/* ==========================================================================
   BOOKS SELLING MOBILE WEB APP — MAIN DESIGN SYSTEM
   app.css — Foundation: tokens, reset, base, components, utilities, animations
   ========================================================================== */

/* ===== IMPORTS ===== */
@import url('https://fonts.googleapis.com/css2?family=Miranda+Sans:wght@300;400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ==========================================================================
   1. DESIGN TOKENS (CSS Custom Properties)
   ========================================================================== */
:root {
    /* ---- Colors: Primary ---- */
    --color-primary: #0A1628;
    --color-primary-light: #1A2A4A;
    --color-primary-lighter: #2A3A5A;
    --color-primary-rgb: 10, 22, 40;

    /* ---- Colors: Gold Accent ---- */
    --color-gold: #C5993A;
    --color-gold-light: #D4B05C;
    --color-gold-dark: #A67D2E;
    --color-gold-rgb: 197, 153, 58;

    /* ---- Colors: Neutral ---- */
    --color-white: #FFFFFF;
    --color-black: #000000;
    --color-bg: #F5F6FA;

    /* ---- Colors: Gray Scale ---- */
    --gray-50: #F8F9FC;
    --gray-100: #F1F3F8;
    --gray-200: #E2E6EF;
    --gray-300: #CDD3E0;
    --gray-400: #A0AAC0;
    --gray-500: #7A849B;
    --gray-600: #5C6478;
    --gray-700: #434B5E;
    --gray-800: #2E3444;
    --gray-900: #1A1F2E;

    /* ---- Colors: Semantic ---- */
    --color-success: #10B981;
    --color-success-light: #D1FAE5;
    --color-success-dark: #059669;
    --color-danger: #EF4444;
    --color-danger-light: #FEE2E2;
    --color-danger-dark: #DC2626;
    --color-warning: #F59E0B;
    --color-warning-light: #FEF3C7;
    --color-warning-dark: #D97706;
    --color-info: #3B82F6;
    --color-info-light: #DBEAFE;
    --color-info-dark: #2563EB;

    /* ---- Typography ---- */
    --font-primary: 'Miranda Sans', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;

    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.8125rem;    /* 13px */
    --text-base: 0.9375rem;  /* 15px */
    --text-md: 1rem;         /* 16px */
    --text-lg: 1.125rem;     /* 18px */
    --text-xl: 1.25rem;      /* 20px */
    --text-2xl: 1.5rem;      /* 24px */
    --text-3xl: 1.875rem;    /* 30px */
    --text-4xl: 2.25rem;     /* 36px */

    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;

    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;

    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;
    --tracking-wider: 0.05em;

    /* ---- Spacing ---- */
    --space-0: 0;
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */

    /* ---- Border Radius ---- */
    --radius-sm: 0.375rem;   /* 6px */
    --radius-md: 0.5rem;     /* 8px */
    --radius-lg: 0.75rem;    /* 12px */
    --radius-xl: 1rem;       /* 16px */
    --radius-2xl: 1.5rem;    /* 24px */
    --radius-full: 9999px;

    /* ---- Shadows (Blue-tinted for premium) ---- */
    --shadow-xs: 0 1px 2px rgba(10, 22, 40, 0.05);
    --shadow-sm: 0 1px 3px rgba(10, 22, 40, 0.08), 0 1px 2px rgba(10, 22, 40, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(10, 22, 40, 0.08), 0 2px 4px -1px rgba(10, 22, 40, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(10, 22, 40, 0.1), 0 4px 6px -2px rgba(10, 22, 40, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(10, 22, 40, 0.12), 0 10px 10px -5px rgba(10, 22, 40, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(10, 22, 40, 0.25);
    --shadow-gold: 0 4px 14px rgba(197, 153, 58, 0.25);
    --shadow-inner: inset 0 2px 4px rgba(10, 22, 40, 0.06);

    /* ---- Transitions ---- */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
    --transition-spring: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* ---- Z-Index Scale ---- */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal: 300;
    --z-toast: 400;
    --z-overlay: 500;

    /* ---- Sizes ---- */
    --sidebar-width: 260px;
    --topbar-height: 60px;
    --bottom-nav-height: 64px;
    --touch-min: 44px;
}

/* ==========================================================================
   2. RESET & BASE STYLES
   ========================================================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    text-size-adjust: 100%;
    scroll-behavior: smooth;
    -webkit-tap-highlight-color: transparent;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--gray-800);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    padding-top: env(safe-area-inset-top);
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
}

/* Selection */
::selection {
    background-color: rgba(197, 153, 58, 0.25);
    color: var(--color-primary);
}
::-moz-selection {
    background-color: rgba(197, 153, 58, 0.25);
    color: var(--color-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--color-primary);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb {
    background: var(--color-gold);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-gold-light);
}

/* Thin scrollbar for Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--color-gold) var(--color-primary);
}

/* Base element resets */
img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
}

img {
    height: auto;
}

input, button, textarea, select {
    font: inherit;
    color: inherit;
}

button {
    cursor: pointer;
    border: none;
    background: none;
}

a {
    color: var(--color-gold-dark);
    text-decoration: none;
    transition: color var(--transition-fast);
}
a:hover {
    color: var(--color-gold);
}

ul, ol {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    color: var(--color-primary);
    letter-spacing: var(--tracking-tight);
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
h5 { font-size: var(--text-md); }
h6 { font-size: var(--text-base); }

p {
    margin-bottom: var(--space-4);
}
p:last-child {
    margin-bottom: 0;
}

strong, b {
    font-weight: var(--font-semibold);
}

hr {
    border: none;
    border-top: 1px solid var(--gray-200);
    margin: var(--space-6) 0;
}

/* ==========================================================================
   3. TYPOGRAPHY CLASSES
   ========================================================================== */

/* Sizes */
.text-xs { font-size: var(--text-xs) !important; }
.text-sm { font-size: var(--text-sm) !important; }
.text-base { font-size: var(--text-base) !important; }
.text-md { font-size: var(--text-md) !important; }
.text-lg { font-size: var(--text-lg) !important; }
.text-xl { font-size: var(--text-xl) !important; }
.text-2xl { font-size: var(--text-2xl) !important; }
.text-3xl { font-size: var(--text-3xl) !important; }
.text-4xl { font-size: var(--text-4xl) !important; }

/* Weights */
.font-light { font-weight: var(--font-light) !important; }
.font-normal { font-weight: var(--font-normal) !important; }
.font-medium { font-weight: var(--font-medium) !important; }
.font-semibold { font-weight: var(--font-semibold) !important; }
.font-bold { font-weight: var(--font-bold) !important; }

/* Colors */
.text-primary { color: var(--color-primary) !important; }
.text-primary-light { color: var(--color-primary-light) !important; }
.text-gold { color: var(--color-gold) !important; }
.text-gold-dark { color: var(--color-gold-dark) !important; }
.text-white { color: var(--color-white) !important; }
.text-muted { color: var(--gray-500) !important; }
.text-success { color: var(--color-success) !important; }
.text-danger { color: var(--color-danger) !important; }
.text-warning { color: var(--color-warning) !important; }
.text-info { color: var(--color-info) !important; }

/* Alignment */
.text-left { text-align: left !important; }
.text-center { text-align: center !important; }
.text-right { text-align: right !important; }

/* Utilities */
.text-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.text-wrap { white-space: normal !important; }
.text-nowrap { white-space: nowrap !important; }
.text-uppercase { text-transform: uppercase !important; letter-spacing: var(--tracking-wider); }
.text-lowercase { text-transform: lowercase !important; }
.text-capitalize { text-transform: capitalize !important; }
.text-line-through { text-decoration: line-through !important; }
.text-underline { text-decoration: underline !important; }

.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ==========================================================================
   4. LAYOUT UTILITIES
   ========================================================================== */

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}
@media (min-width: 576px) {
    .container { max-width: 540px; }
}
@media (min-width: 768px) {
    .container { max-width: 720px; }
}
@media (min-width: 992px) {
    .container { max-width: 960px; }
}
@media (min-width: 1200px) {
    .container { max-width: 1140px; }
}

.container-fluid {
    width: 100%;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

/* Page content (reserves bottom nav space) */
.page-content {
    padding-bottom: calc(var(--bottom-nav-height) + var(--space-6) + env(safe-area-inset-bottom));
    min-height: 100vh;
    min-height: 100dvh;
}

/* Flex */
.d-flex { display: flex !important; }
.d-inline-flex { display: inline-flex !important; }
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-inline-block { display: inline-block !important; }
.d-grid { display: grid !important; }

.flex-row { flex-direction: row !important; }
.flex-column { flex-direction: column !important; }
.flex-wrap { flex-wrap: wrap !important; }
.flex-nowrap { flex-wrap: nowrap !important; }
.flex-1 { flex: 1 1 0% !important; }
.flex-grow { flex-grow: 1 !important; }
.flex-shrink-0 { flex-shrink: 0 !important; }

.align-start { align-items: flex-start !important; }
.align-center { align-items: center !important; }
.align-end { align-items: flex-end !important; }
.align-stretch { align-items: stretch !important; }
.align-self-center { align-self: center !important; }
.align-self-end { align-self: flex-end !important; }

.justify-start { justify-content: flex-start !important; }
.justify-center { justify-content: center !important; }
.justify-end { justify-content: flex-end !important; }
.justify-between { justify-content: space-between !important; }
.justify-around { justify-content: space-around !important; }
.justify-evenly { justify-content: space-evenly !important; }

.gap-1 { gap: var(--space-1) !important; }
.gap-2 { gap: var(--space-2) !important; }
.gap-3 { gap: var(--space-3) !important; }
.gap-4 { gap: var(--space-4) !important; }
.gap-5 { gap: var(--space-5) !important; }
.gap-6 { gap: var(--space-6) !important; }
.gap-8 { gap: var(--space-8) !important; }

/* Sizing */
.w-100 { width: 100% !important; }
.w-auto { width: auto !important; }
.h-100 { height: 100% !important; }
.h-auto { height: auto !important; }
.min-h-screen { min-height: 100vh !important; min-height: 100dvh !important; }

/* Position */
.position-relative { position: relative !important; }
.position-absolute { position: absolute !important; }
.position-fixed { position: fixed !important; }
.position-sticky { position: sticky !important; }

/* Margin */
.m-0 { margin: 0 !important; }
.m-1 { margin: var(--space-1) !important; }
.m-2 { margin: var(--space-2) !important; }
.m-3 { margin: var(--space-3) !important; }
.m-4 { margin: var(--space-4) !important; }
.m-auto { margin: auto !important; }

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: var(--space-1) !important; }
.mt-2 { margin-top: var(--space-2) !important; }
.mt-3 { margin-top: var(--space-3) !important; }
.mt-4 { margin-top: var(--space-4) !important; }
.mt-5 { margin-top: var(--space-5) !important; }
.mt-6 { margin-top: var(--space-6) !important; }
.mt-8 { margin-top: var(--space-8) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: var(--space-1) !important; }
.mb-2 { margin-bottom: var(--space-2) !important; }
.mb-3 { margin-bottom: var(--space-3) !important; }
.mb-4 { margin-bottom: var(--space-4) !important; }
.mb-5 { margin-bottom: var(--space-5) !important; }
.mb-6 { margin-bottom: var(--space-6) !important; }
.mb-8 { margin-bottom: var(--space-8) !important; }

.ms-0 { margin-left: 0 !important; }
.ms-1 { margin-left: var(--space-1) !important; }
.ms-2 { margin-left: var(--space-2) !important; }
.ms-3 { margin-left: var(--space-3) !important; }
.ms-4 { margin-left: var(--space-4) !important; }
.ms-auto { margin-left: auto !important; }

.me-0 { margin-right: 0 !important; }
.me-1 { margin-right: var(--space-1) !important; }
.me-2 { margin-right: var(--space-2) !important; }
.me-3 { margin-right: var(--space-3) !important; }
.me-4 { margin-right: var(--space-4) !important; }
.me-auto { margin-right: auto !important; }

.mx-auto { margin-left: auto !important; margin-right: auto !important; }

/* Padding */
.p-0 { padding: 0 !important; }
.p-1 { padding: var(--space-1) !important; }
.p-2 { padding: var(--space-2) !important; }
.p-3 { padding: var(--space-3) !important; }
.p-4 { padding: var(--space-4) !important; }
.p-5 { padding: var(--space-5) !important; }
.p-6 { padding: var(--space-6) !important; }
.p-8 { padding: var(--space-8) !important; }

.pt-0 { padding-top: 0 !important; }
.pt-1 { padding-top: var(--space-1) !important; }
.pt-2 { padding-top: var(--space-2) !important; }
.pt-3 { padding-top: var(--space-3) !important; }
.pt-4 { padding-top: var(--space-4) !important; }
.pt-6 { padding-top: var(--space-6) !important; }

.pb-0 { padding-bottom: 0 !important; }
.pb-1 { padding-bottom: var(--space-1) !important; }
.pb-2 { padding-bottom: var(--space-2) !important; }
.pb-3 { padding-bottom: var(--space-3) !important; }
.pb-4 { padding-bottom: var(--space-4) !important; }
.pb-6 { padding-bottom: var(--space-6) !important; }

.ps-0 { padding-left: 0 !important; }
.ps-1 { padding-left: var(--space-1) !important; }
.ps-2 { padding-left: var(--space-2) !important; }
.ps-3 { padding-left: var(--space-3) !important; }
.ps-4 { padding-left: var(--space-4) !important; }

.pe-0 { padding-right: 0 !important; }
.pe-1 { padding-right: var(--space-1) !important; }
.pe-2 { padding-right: var(--space-2) !important; }
.pe-3 { padding-right: var(--space-3) !important; }
.pe-4 { padding-right: var(--space-4) !important; }

.px-4 { padding-left: var(--space-4) !important; padding-right: var(--space-4) !important; }
.py-2 { padding-top: var(--space-2) !important; padding-bottom: var(--space-2) !important; }
.py-3 { padding-top: var(--space-3) !important; padding-bottom: var(--space-3) !important; }
.py-4 { padding-top: var(--space-4) !important; padding-bottom: var(--space-4) !important; }
.py-6 { padding-top: var(--space-6) !important; padding-bottom: var(--space-6) !important; }
.py-8 { padding-top: var(--space-8) !important; padding-bottom: var(--space-8) !important; }

/* ==========================================================================
   5. BUTTON STYLES
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-height: var(--touch-min);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    line-height: var(--leading-tight);
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    touch-action: manipulation;
    user-select: none;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn:active {
    transform: scale(0.97);
}

.btn:focus-visible {
    outline: 2px solid var(--color-gold);
    outline-offset: 2px;
}

/* Primary */
.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
    border-bottom: 3px solid var(--color-gold);
}
.btn-primary:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary-light);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

/* Gold */
.btn-gold {
    background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
    color: var(--color-primary);
    border-color: var(--color-gold);
}
.btn-gold:hover {
    background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold));
    box-shadow: var(--shadow-gold);
    color: var(--color-primary);
}

/* Outline */
.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

/* Outline Gold */
.btn-outline-gold {
    background: transparent;
    color: var(--color-gold-dark);
    border-color: var(--color-gold);
}
.btn-outline-gold:hover {
    background: var(--color-gold);
    color: var(--color-primary);
}

/* Danger */
.btn-danger {
    background: var(--color-danger);
    color: var(--color-white);
    border-color: var(--color-danger);
}
.btn-danger:hover {
    background: var(--color-danger-dark);
    border-color: var(--color-danger-dark);
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.3);
}

/* Success */
.btn-success {
    background: var(--color-success);
    color: var(--color-white);
    border-color: var(--color-success);
}
.btn-success:hover {
    background: var(--color-success-dark);
    border-color: var(--color-success-dark);
}

/* Ghost */
.btn-ghost {
    background: transparent;
    color: var(--gray-600);
    border-color: transparent;
}
.btn-ghost:hover {
    background: var(--gray-100);
    color: var(--color-primary);
}

/* White */
.btn-white {
    background: var(--color-white);
    color: var(--color-primary);
    border-color: var(--gray-200);
}
.btn-white:hover {
    background: var(--gray-50);
    border-color: var(--gray-300);
    box-shadow: var(--shadow-sm);
}

/* Sizes */
.btn-sm {
    min-height: 36px;
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
}

.btn-lg {
    min-height: 52px;
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
    border-radius: var(--radius-xl);
}

.btn-block {
    display: flex;
    width: 100%;
}

/* Icon button */
.btn-icon {
    width: var(--touch-min);
    height: var(--touch-min);
    min-height: var(--touch-min);
    padding: 0;
    border-radius: var(--radius-full);
}
.btn-icon svg {
    width: 20px;
    height: 20px;
}

/* Floating Action Button */
.btn-fab {
    position: fixed;
    bottom: calc(var(--bottom-nav-height) + var(--space-4) + env(safe-area-inset-bottom));
    right: var(--space-4);
    width: 56px;
    height: 56px;
    min-height: 56px;
    padding: 0;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
    color: var(--color-primary);
    box-shadow: var(--shadow-xl), var(--shadow-gold);
    z-index: var(--z-sticky);
}
.btn-fab:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-2xl), 0 6px 20px rgba(197, 153, 58, 0.4);
}
.btn-fab:active {
    transform: scale(0.95);
}
.btn-fab svg {
    width: 24px;
    height: 24px;
}

/* Disabled */
.btn:disabled,
.btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
    transform: none;
}

/* Loading state */
.btn.is-loading {
    color: transparent !important;
    pointer-events: none;
    position: relative;
}
.btn.is-loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: var(--radius-full);
    animation: spin 0.6s linear infinite;
    top: 50%;
    left: 50%;
    margin-top: -10px;
    margin-left: -10px;
}
.btn-primary.is-loading::after,
.btn-danger.is-loading::after,
.btn-success.is-loading::after {
    border-color: var(--color-white);
    border-right-color: transparent;
}
.btn-gold.is-loading::after {
    border-color: var(--color-primary);
    border-right-color: transparent;
}

/* Button group */
.btn-group {
    display: inline-flex;
    gap: 0;
}
.btn-group .btn {
    border-radius: 0;
}
.btn-group .btn:first-child {
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}
.btn-group .btn:last-child {
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}
.btn-group .btn + .btn {
    margin-left: -2px;
}

/* ==========================================================================
   6. CARD STYLES
   ========================================================================== */
.card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}
.card:hover {
    box-shadow: var(--shadow-md);
}

.card-body {
    padding: var(--space-5);
}

.card-header {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-footer {
    padding: var(--space-4) var(--space-5);
    border-top: 1px solid var(--gray-100);
    background: var(--gray-50);
}

.card-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-primary);
    margin-bottom: var(--space-1);
}

.card-subtitle {
    font-size: var(--text-sm);
    color: var(--gray-500);
}

/* Glass card */
.card-glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow-lg);
}

/* Stat card */
.card-stat {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    transition: all var(--transition-normal);
    border: 1px solid var(--gray-100);
}
.card-stat:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.card-stat-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xl);
}
.card-stat-icon.gold {
    background: rgba(197, 153, 58, 0.1);
    color: var(--color-gold);
}
.card-stat-icon.blue {
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-info);
}
.card-stat-icon.green {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
}
.card-stat-icon.red {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-danger);
}
.card-stat-content {
    flex: 1;
    min-width: 0;
}
.card-stat-value {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--color-primary);
    line-height: var(--leading-none);
    margin-bottom: var(--space-1);
}
.card-stat-label {
    font-size: var(--text-sm);
    color: var(--gray-500);
    font-weight: var(--font-medium);
}
.card-stat-trend {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    margin-top: var(--space-1);
    padding: 2px var(--space-2);
    border-radius: var(--radius-full);
}
.card-stat-trend.up {
    background: var(--color-success-light);
    color: var(--color-success-dark);
}
.card-stat-trend.down {
    background: var(--color-danger-light);
    color: var(--color-danger-dark);
}

/* Book card (storefront) */
.card-book {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
}
.card-book:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.card-book-cover {
    position: relative;
    width: 100%;
    aspect-ratio: 2 / 3;
    overflow: hidden;
    background: var(--gray-100);
}
.card-book-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}
.card-book:hover .card-book-cover img {
    transform: scale(1.05);
}
.card-book-badge {
    position: absolute;
    top: var(--space-3);
    left: var(--space-3);
    z-index: 1;
}
.card-book-wishlist {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    z-index: 1;
}
.card-book-wishlist:hover {
    background: var(--color-white);
    transform: scale(1.1);
}
.card-book-wishlist.active {
    color: var(--color-danger);
}
.card-book-wishlist svg {
    width: 18px;
    height: 18px;
}
.card-book-info {
    padding: var(--space-3) var(--space-4) var(--space-4);
}
.card-book-title {
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    color: var(--color-primary);
    margin-bottom: var(--space-1);
    line-height: var(--leading-snug);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.card-book-author {
    font-size: var(--text-sm);
    color: var(--gray-500);
    margin-bottom: var(--space-2);
}
.card-book-price {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}
.card-book-price-current {
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    color: var(--color-gold-dark);
}
.card-book-price-old {
    font-size: var(--text-sm);
    color: var(--gray-400);
    text-decoration: line-through;
}

/* ==========================================================================
   7. FORM STYLES (Custom — NOT generic Bootstrap)
   ========================================================================== */
.form-group {
    margin-bottom: var(--space-5);
    position: relative;
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--gray-700);
    margin-bottom: var(--space-2);
    letter-spacing: var(--tracking-wide);
}

.form-label .required {
    color: var(--color-danger);
    margin-left: 2px;
}

.form-control {
    display: block;
    width: 100%;
    height: 48px;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--gray-800);
    background-color: var(--color-white);
    background-clip: padding-box;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    appearance: none;
    -webkit-appearance: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control::placeholder {
    color: var(--gray-400);
    opacity: 1;
}

.form-control:hover {
    border-color: var(--gray-300);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-gold);
    box-shadow: 0 0 0 3px rgba(197, 153, 58, 0.15);
}

.form-control.is-invalid {
    border-color: var(--color-danger);
}
.form-control.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.form-control.is-valid {
    border-color: var(--color-success);
}

/* Textarea */
textarea.form-control {
    height: auto;
    min-height: 100px;
    resize: vertical;
}

/* Select */
.form-select {
    display: block;
    width: 100%;
    height: 48px;
    padding: var(--space-3) var(--space-10) var(--space-3) var(--space-4);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--gray-800);
    background-color: var(--color-white);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M2.5 4.5L6 8L9.5 4.5' stroke='%235C6478' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-4) center;
    background-size: 12px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    appearance: none;
    -webkit-appearance: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    cursor: pointer;
}

.form-select:focus {
    outline: none;
    border-color: var(--color-gold);
    box-shadow: 0 0 0 3px rgba(197, 153, 58, 0.15);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    min-height: var(--touch-min);
    padding: var(--space-2) 0;
    cursor: pointer;
}

.form-check-input {
    width: 20px;
    height: 20px;
    min-width: 20px;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    background: var(--color-white);
}
.form-check-input[type="radio"] {
    border-radius: var(--radius-full);
}

.form-check-input:checked {
    background: var(--color-gold);
    border-color: var(--color-gold);
}
.form-check-input:checked::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.form-check-input[type="checkbox"]:checked::after {
    width: 5px;
    height: 9px;
    border: solid var(--color-white);
    border-width: 0 2px 2px 0;
    transform: translate(-50%, -60%) rotate(45deg);
}
.form-check-input[type="radio"]:checked::after {
    width: 8px;
    height: 8px;
    background: var(--color-white);
    border-radius: var(--radius-full);
}

.form-check-input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(197, 153, 58, 0.15);
}

.form-check-label {
    font-size: var(--text-base);
    color: var(--gray-700);
    cursor: pointer;
    user-select: none;
}

/* Password toggle */
.password-wrapper {
    position: relative;
}
.password-wrapper .form-control {
    padding-right: 52px;
}
.password-toggle {
    position: absolute;
    right: var(--space-2);
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: color var(--transition-fast);
    touch-action: manipulation;
}
.password-toggle:hover {
    color: var(--gray-600);
}
.password-toggle svg {
    width: 20px;
    height: 20px;
}

/* Form hint & error */
.form-hint {
    display: block;
    font-size: var(--text-xs);
    color: var(--gray-500);
    margin-top: var(--space-2);
}

.form-error {
    display: block;
    font-size: var(--text-xs);
    color: var(--color-danger);
    margin-top: var(--space-2);
    animation: fadeInUp 0.2s ease;
}

/* Input group */
.input-group {
    position: relative;
    display: flex;
    align-items: stretch;
}
.input-group .form-control {
    flex: 1;
}
.input-group-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    z-index: 1;
    pointer-events: none;
}
.input-group-icon svg {
    width: 20px;
    height: 20px;
}
.input-group-icon + .form-control {
    padding-left: 44px;
}

.input-group-suffix {
    position: absolute;
    right: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    z-index: 1;
    pointer-events: none;
}

/* Search input */
.form-search {
    position: relative;
}
.form-search .form-control {
    padding-left: 44px;
    border-radius: var(--radius-full);
    height: var(--touch-min);
    background: var(--gray-50);
    border-color: transparent;
}
.form-search .form-control:focus {
    background: var(--color-white);
    border-color: var(--color-gold);
}
.form-search-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    pointer-events: none;
}
.form-search-icon svg {
    width: 20px;
    height: 20px;
}

/* File input */
.form-file {
    position: relative;
}
.form-file-input {
    position: absolute;
    width: 0;
    height: 0;
    opacity: 0;
    overflow: hidden;
}
.form-file-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    width: 100%;
    min-height: 48px;
    padding: var(--space-3) var(--space-4);
    background: var(--gray-50);
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-lg);
    color: var(--gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
}
.form-file-label:hover {
    border-color: var(--color-gold);
    background: rgba(197, 153, 58, 0.05);
}

/* ==========================================================================
   8. BADGE & TAG STYLES
   ========================================================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    line-height: var(--leading-tight);
    border-radius: var(--radius-full);
    white-space: nowrap;
    letter-spacing: var(--tracking-wide);
}

.badge-primary {
    background: rgba(10, 22, 40, 0.1);
    color: var(--color-primary);
}
.badge-gold {
    background: rgba(197, 153, 58, 0.15);
    color: var(--color-gold-dark);
}

/* Book type badges */
.badge-ebook {
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-info-dark);
}
.badge-physical {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success-dark);
}
.badge-audiobook {
    background: rgba(139, 92, 246, 0.1);
    color: #7C3AED;
}

/* Status badges */
.badge-status-pending {
    background: var(--color-warning-light);
    color: var(--color-warning-dark);
}
.badge-status-paid,
.badge-status-published,
.badge-status-active {
    background: var(--color-success-light);
    color: var(--color-success-dark);
}
.badge-status-draft {
    background: var(--gray-100);
    color: var(--gray-600);
}
.badge-status-cancelled,
.badge-status-rejected {
    background: var(--color-danger-light);
    color: var(--color-danger-dark);
}
.badge-status-processing {
    background: var(--color-info-light);
    color: var(--color-info-dark);
}

/* Tag */
.tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    background: var(--gray-100);
    color: var(--gray-700);
    border-radius: var(--radius-full);
    border: 1px solid var(--gray-200);
}
.tag-remove {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: var(--radius-full);
    background: var(--gray-300);
    color: var(--gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    padding: 0;
    font-size: 10px;
    line-height: 1;
}
.tag-remove:hover {
    background: var(--color-danger);
    color: var(--color-white);
}

/* ==========================================================================
   9. TABLE STYLES
   ========================================================================== */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius-xl);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.data-table th {
    position: sticky;
    top: 0;
    background: var(--color-primary);
    color: var(--color-white);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    padding: var(--space-3) var(--space-4);
    text-align: left;
    white-space: nowrap;
    letter-spacing: var(--tracking-wide);
    user-select: none;
}
.data-table th:first-child {
    border-radius: var(--radius-xl) 0 0 0;
}
.data-table th:last-child {
    border-radius: 0 var(--radius-xl) 0 0;
}

.data-table th.sortable {
    cursor: pointer;
    transition: background var(--transition-fast);
}
.data-table th.sortable:hover {
    background: var(--color-primary-light);
}
.data-table th .sort-icon {
    display: inline-flex;
    margin-left: var(--space-1);
    opacity: 0.4;
}
.data-table th.sort-asc .sort-icon,
.data-table th.sort-desc .sort-icon {
    opacity: 1;
    color: var(--color-gold);
}

.data-table td {
    padding: var(--space-3) var(--space-4);
    vertical-align: middle;
    border-bottom: 1px solid var(--gray-100);
    font-size: var(--text-sm);
    color: var(--gray-700);
}

.data-table tbody tr {
    transition: background var(--transition-fast);
}
.data-table tbody tr:hover {
    background: rgba(197, 153, 58, 0.04);
}
.data-table tbody tr:last-child td {
    border-bottom: none;
}

.data-table .row-checkbox {
    width: 44px;
    text-align: center;
}

/* Hide table on mobile, show cards */
@media (max-width: 768px) {
    .data-table-container .table-responsive {
        display: none;
    }
    .data-table-container .mobile-card-list {
        display: block;
    }
}
@media (min-width: 769px) {
    .data-table-container .mobile-card-list {
        display: none;
    }
}

/* ==========================================================================
   10. MOBILE CARD LIST (Replaces tables on mobile)
   ========================================================================== */
.mobile-card-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.mobile-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 1px solid var(--gray-100);
}

.mobile-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    cursor: pointer;
    touch-action: manipulation;
}

.mobile-card-header-content {
    flex: 1;
    min-width: 0;
}
.mobile-card-header-title {
    font-weight: var(--font-semibold);
    color: var(--color-primary);
    font-size: var(--text-base);
    margin-bottom: var(--space-1);
}
.mobile-card-header-subtitle {
    font-size: var(--text-sm);
    color: var(--gray-500);
}

.mobile-card-expand-icon {
    width: 24px;
    height: 24px;
    color: var(--gray-400);
    transition: transform var(--transition-normal);
    flex-shrink: 0;
}
.mobile-card.expanded .mobile-card-expand-icon {
    transform: rotate(180deg);
}

.mobile-card-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}
.mobile-card.expanded .mobile-card-body {
    max-height: 500px;
}

.mobile-card-body-inner {
    padding: 0 var(--space-4) var(--space-4);
    border-top: 1px solid var(--gray-100);
    padding-top: var(--space-4);
}

.mobile-card-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-2) 0;
    font-size: var(--text-sm);
}
.mobile-card-row-label {
    color: var(--gray-500);
    font-weight: var(--font-medium);
}
.mobile-card-row-value {
    color: var(--gray-800);
    font-weight: var(--font-medium);
    text-align: right;
}

.mobile-card-actions {
    display: flex;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border-top: 1px solid var(--gray-100);
    background: var(--gray-50);
}
.mobile-card-actions .btn {
    flex: 1;
}

/* ==========================================================================
   11. MODAL & BOTTOM SHEET
   ========================================================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 22, 40, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: var(--z-modal);
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}
.modal-overlay.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    width: 90%;
    max-width: 500px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-2xl);
    animation: scaleIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
}

.modal-handle {
    display: none;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--gray-100);
}
.modal-header-title {
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    color: var(--color-primary);
}
.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    color: var(--gray-500);
    transition: all var(--transition-fast);
    cursor: pointer;
    background: none;
    border: none;
}
.modal-close:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

.modal-body {
    padding: var(--space-6);
}

.modal-footer {
    display: flex;
    gap: var(--space-3);
    justify-content: flex-end;
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--gray-100);
}

/* Bottom sheet on mobile */
@media (max-width: 768px) {
    .modal-overlay.active {
        align-items: flex-end;
    }

    .modal-content {
        width: 100%;
        max-width: 100%;
        max-height: 90vh;
        border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
        animation: slideUp 0.35s cubic-bezier(0.32, 0.72, 0, 1);
    }

    .modal-handle {
        display: flex;
        justify-content: center;
        padding: var(--space-3) 0 0;
    }
    .modal-handle::after {
        content: '';
        width: 40px;
        height: 4px;
        background: var(--gray-300);
        border-radius: var(--radius-full);
    }
}

/* Confirm dialog */
.confirm-dialog .modal-body {
    text-align: center;
    padding: var(--space-8) var(--space-6);
}
.confirm-dialog .confirm-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-5);
    font-size: var(--text-2xl);
}
.confirm-dialog .confirm-icon.danger {
    background: var(--color-danger-light);
    color: var(--color-danger);
}
.confirm-dialog .confirm-icon.warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
}
.confirm-dialog .confirm-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}
.confirm-dialog .confirm-message {
    color: var(--gray-600);
    font-size: var(--text-base);
}
.confirm-dialog .modal-footer {
    justify-content: center;
}

/* Premium feedback modals (processing / success / error) */
.feedback-dialog {
    max-width: 420px;
    text-align: center;
    overflow: hidden;
}
.feedback-dialog .modal-body {
    padding: var(--space-8) var(--space-6) var(--space-6);
}
.feedback-icon-wrap {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-5);
    position: relative;
}
.feedback-icon-wrap.processing {
    background: linear-gradient(135deg, rgba(10, 22, 40, 0.06), rgba(197, 153, 58, 0.12));
}
.feedback-icon-wrap.success {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.12), rgba(34, 197, 94, 0.22));
    color: var(--color-success);
    animation: feedbackPop 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.feedback-icon-wrap.error {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(239, 68, 68, 0.2));
    color: var(--color-danger);
    animation: feedbackPop 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.feedback-icon-wrap svg {
    width: 36px;
    height: 36px;
}
.feedback-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}
.feedback-message {
    color: var(--gray-600);
    font-size: var(--text-base);
    line-height: 1.6;
    margin: 0;
}
.feedback-dialog .modal-footer {
    justify-content: center;
    padding-top: var(--space-2);
    border-top: none;
}
.feedback-dialog .modal-footer .btn {
    min-width: 140px;
}
.feedback-dialog.is-processing .modal-footer {
    display: none;
}
.feedback-dialog.is-processing {
    pointer-events: none;
}
@keyframes feedbackPop {
    0% { transform: scale(0.6); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

/* ==========================================================================
   12. TOAST NOTIFICATIONS
   ========================================================================== */
.toast-container {
    position: fixed;
    top: var(--space-4);
    right: var(--space-4);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    pointer-events: none;
    max-width: 400px;
    width: 100%;
}

@media (max-width: 768px) {
    .toast-container {
        right: var(--space-4);
        left: var(--space-4);
        max-width: none;
        width: auto;
        top: calc(var(--space-4) + env(safe-area-inset-top));
    }
}

.toast {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    pointer-events: auto;
    position: relative;
    overflow: hidden;
    animation: slideInRight 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    cursor: pointer;
    border-left: 4px solid transparent;
    touch-action: manipulation;
}

@media (max-width: 768px) {
    .toast {
        animation: fadeInDown 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    }
}

.toast.removing {
    animation: fadeOut 0.25s ease forwards;
}

.toast-icon {
    width: 24px;
    height: 24px;
    min-width: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
}

.toast-content {
    flex: 1;
    min-width: 0;
}
.toast-message {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--gray-800);
}
.toast-action {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-gold-dark);
    cursor: pointer;
    margin-top: var(--space-1);
    display: inline-block;
}

.toast-close {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    cursor: pointer;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast);
    flex-shrink: 0;
}
.toast-close:hover {
    color: var(--gray-700);
}

.toast-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    border-radius: 0 0 0 var(--radius-xl);
    animation: toastProgress linear forwards;
}

/* Toast variants */
.toast-success {
    border-left-color: var(--color-success);
}
.toast-success .toast-icon {
    background: var(--color-success-light);
    color: var(--color-success);
}
.toast-success .toast-progress {
    background: var(--color-success);
}

.toast-error {
    border-left-color: var(--color-danger);
}
.toast-error .toast-icon {
    background: var(--color-danger-light);
    color: var(--color-danger);
}
.toast-error .toast-progress {
    background: var(--color-danger);
}

.toast-warning {
    border-left-color: var(--color-warning);
}
.toast-warning .toast-icon {
    background: var(--color-warning-light);
    color: var(--color-warning);
}
.toast-warning .toast-progress {
    background: var(--color-warning);
}

.toast-info {
    border-left-color: var(--color-info);
}
.toast-info .toast-icon {
    background: var(--color-info-light);
    color: var(--color-info);
}
.toast-info .toast-progress {
    background: var(--color-info);
}

@keyframes toastProgress {
    from { width: 100%; }
    to { width: 0%; }
}

/* ==========================================================================
   13. NAVIGATION — BOTTOM NAV
   ========================================================================== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background: var(--color-white);
    border-top: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-around;
    z-index: var(--z-sticky);
    padding-bottom: env(safe-area-inset-bottom);
    box-shadow: 0 -2px 10px rgba(10, 22, 40, 0.06);
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-1);
    min-width: var(--touch-min);
    min-height: var(--touch-min);
    padding: var(--space-2);
    color: var(--gray-500);
    text-decoration: none;
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    transition: all var(--transition-fast);
    position: relative;
    touch-action: manipulation;
}
.bottom-nav-item svg {
    width: 24px;
    height: 24px;
    transition: transform var(--transition-spring);
}
.bottom-nav-item.active {
    color: var(--color-gold-dark);
}
.bottom-nav-item.active svg {
    transform: scale(1.1);
}
.bottom-nav-item.active::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background: var(--color-gold);
    border-radius: 0 0 var(--radius-full) var(--radius-full);
}

.bottom-nav-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    min-width: 18px;
    height: 18px;
    padding: 0 4px;
    font-size: 10px;
    font-weight: var(--font-bold);
    background: var(--color-danger);
    color: var(--color-white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

/* ==========================================================================
   14. NAVIGATION — SIDEBAR
   ========================================================================== */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--color-primary);
    z-index: var(--z-modal);
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-slow);
    overflow-y: auto;
    overscroll-behavior: contain;
}

.sidebar-header {
    padding: var(--space-6) var(--space-5);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}
.sidebar-logo {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-weight: var(--font-bold);
    font-size: var(--text-lg);
}
.sidebar-brand {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--color-white);
    letter-spacing: var(--tracking-tight);
}
.sidebar-brand span {
    color: var(--color-gold);
}

.sidebar-menu {
    padding: var(--space-4) 0;
    flex: 1;
}

.sidebar-group {
    margin-bottom: var(--space-2);
}
.sidebar-group-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-2) var(--space-5);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    color: rgba(255, 255, 255, 0.35);
    cursor: pointer;
    user-select: none;
}
.sidebar-group-title .collapse-icon {
    transition: transform var(--transition-normal);
}
.sidebar-group.collapsed .sidebar-group-title .collapse-icon {
    transform: rotate(-90deg);
}
.sidebar-group.collapsed .sidebar-group-items {
    display: none;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-5);
    color: rgba(255, 255, 255, 0.65);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    text-decoration: none;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
    position: relative;
}
.sidebar-item svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}
.sidebar-item:hover {
    background: var(--color-primary-light);
    color: var(--color-white);
}
.sidebar-item.active {
    background: rgba(197, 153, 58, 0.1);
    color: var(--color-gold);
    border-left-color: var(--color-gold);
    font-weight: var(--font-semibold);
}
.sidebar-item-badge {
    margin-left: auto;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    font-size: 11px;
    font-weight: var(--font-bold);
    background: var(--color-gold);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-footer {
    padding: var(--space-4) var(--space-5);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* Sidebar overlay */
.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 22, 40, 0.5);
    z-index: calc(var(--z-modal) - 1);
    display: none;
    opacity: 0;
    transition: opacity var(--transition-normal);
}
.sidebar-overlay.active {
    display: block;
    opacity: 1;
}

/* Mobile sidebar */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open {
        transform: translateX(0);
    }
}
@media (min-width: 993px) {
    .sidebar-overlay {
        display: none !important;
    }
}

/* ==========================================================================
   15. TOP BAR
   ========================================================================== */
.topbar {
    background: var(--color-white);
    box-shadow: var(--shadow-xs);
    padding: 0 var(--space-5);
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.topbar-toggle {
    width: var(--touch-min);
    height: var(--touch-min);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    color: var(--gray-700);
    cursor: pointer;
    transition: background var(--transition-fast);
    background: none;
    border: none;
}
.topbar-toggle:hover {
    background: var(--gray-100);
}
.topbar-toggle svg {
    width: 24px;
    height: 24px;
}

@media (min-width: 993px) {
    .topbar-toggle {
        display: none;
    }
}

.topbar-title {
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    color: var(--color-primary);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.topbar-icon-btn {
    width: var(--touch-min);
    height: var(--touch-min);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    color: var(--gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    background: none;
    border: none;
}
.topbar-icon-btn:hover {
    background: var(--gray-100);
    color: var(--color-primary);
}
.topbar-icon-btn svg {
    width: 22px;
    height: 22px;
}
.topbar-icon-btn .notification-dot {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 8px;
    height: 8px;
    background: var(--color-danger);
    border-radius: var(--radius-full);
    border: 2px solid var(--color-white);
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: background var(--transition-fast);
}
.topbar-user:hover {
    background: var(--gray-50);
}
.topbar-user-name {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--gray-800);
    display: none;
}
@media (min-width: 768px) {
    .topbar-user-name {
        display: block;
    }
}

/* ==========================================================================
   16. SKELETON LOADING
   ========================================================================== */
.skeleton {
    background: var(--gray-200);
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;
}
.skeleton::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.5),
        transparent
    );
    animation: shimmer 1.5s infinite;
}

.skeleton-text {
    height: 14px;
    width: 100%;
    border-radius: var(--radius-sm);
}
.skeleton-text.short {
    width: 60%;
}
.skeleton-text.medium {
    width: 80%;
}

.skeleton-title {
    height: 20px;
    width: 70%;
    border-radius: var(--radius-sm);
}

.skeleton-circle {
    border-radius: var(--radius-full);
}
.skeleton-circle.sm {
    width: 32px;
    height: 32px;
}
.skeleton-circle.md {
    width: 44px;
    height: 44px;
}
.skeleton-circle.lg {
    width: 64px;
    height: 64px;
}

.skeleton-rect {
    border-radius: var(--radius-lg);
}

.skeleton-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    box-shadow: var(--shadow-sm);
}

.skeleton-book-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
}
.skeleton-book-card .skeleton-cover {
    width: 100%;
    aspect-ratio: 2/3;
}
.skeleton-book-card .skeleton-info {
    padding: var(--space-3) var(--space-4) var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

/* ==========================================================================
   17. ANIMATIONS
   ========================================================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        transform: translateY(0);
    }
    to {
        transform: translateY(100%);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* Animation utility classes */
.animate-fade-in {
    animation: fadeIn 0.3s ease forwards;
}
.animate-fade-in-up {
    animation: fadeInUp 0.4s ease forwards;
}
.animate-fade-in-down {
    animation: fadeInDown 0.4s ease forwards;
}
.animate-slide-up {
    animation: slideUp 0.35s cubic-bezier(0.32, 0.72, 0, 1) forwards;
}
.animate-slide-in-right {
    animation: slideInRight 0.35s ease forwards;
}
.animate-slide-in-left {
    animation: slideInLeft 0.35s ease forwards;
}
.animate-scale-in {
    animation: scaleIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}
.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}
.animate-spin {
    animation: spin 0.8s linear infinite;
}
.animate-bounce {
    animation: bounce 1s ease infinite;
}

/* Staggered children animation */
.stagger-children > * {
    opacity: 0;
    animation: fadeInUp 0.4s ease forwards;
}
.stagger-children > *:nth-child(1) { animation-delay: 0.05s; }
.stagger-children > *:nth-child(2) { animation-delay: 0.1s; }
.stagger-children > *:nth-child(3) { animation-delay: 0.15s; }
.stagger-children > *:nth-child(4) { animation-delay: 0.2s; }
.stagger-children > *:nth-child(5) { animation-delay: 0.25s; }
.stagger-children > *:nth-child(6) { animation-delay: 0.3s; }
.stagger-children > *:nth-child(7) { animation-delay: 0.35s; }
.stagger-children > *:nth-child(8) { animation-delay: 0.4s; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ==========================================================================
   18. MISCELLANEOUS UTILITIES
   ========================================================================== */

/* Loading overlay */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 22, 40, 0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: var(--z-overlay);
    flex-direction: column;
    gap: var(--space-4);
}
.loading-overlay.active {
    display: flex;
}

/* Spinner */
.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--color-gold);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}
.spinner.sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}
.spinner.lg {
    width: 48px;
    height: 48px;
    border-width: 4px;
}

/* Empty state */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-12) var(--space-6);
}
.empty-state-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-5);
    color: var(--gray-400);
    font-size: var(--text-3xl);
}
.empty-state-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}
.empty-state-message {
    font-size: var(--text-base);
    color: var(--gray-500);
    max-width: 300px;
    margin-bottom: var(--space-6);
}

/* Divider */
.divider {
    height: 1px;
    background: var(--gray-200);
    margin: var(--space-4) 0;
    border: none;
}
.divider-with-text {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin: var(--space-6) 0;
    color: var(--gray-400);
    font-size: var(--text-sm);
}
.divider-with-text::before,
.divider-with-text::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--gray-200);
}

/* Avatar */
.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    color: var(--color-white);
    font-weight: var(--font-semibold);
    flex-shrink: 0;
}
.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.avatar-sm {
    width: 32px;
    height: 32px;
    font-size: var(--text-xs);
}
.avatar-md {
    width: 40px;
    height: 40px;
    font-size: var(--text-sm);
}
.avatar-lg {
    width: 56px;
    height: 56px;
    font-size: var(--text-lg);
}
.avatar-xl {
    width: 80px;
    height: 80px;
    font-size: var(--text-2xl);
}

.avatar-group {
    display: flex;
}
.avatar-group .avatar {
    border: 2px solid var(--color-white);
}
.avatar-group .avatar + .avatar {
    margin-left: -8px;
}

/* Status dot */
.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    flex-shrink: 0;
}
.status-dot.online { background: var(--color-success); }
.status-dot.offline { background: var(--gray-400); }
.status-dot.busy { background: var(--color-danger); }
.status-dot.away { background: var(--color-warning); }
.status-dot.lg {
    width: 12px;
    height: 12px;
}

/* Price display */
.price {
    font-weight: var(--font-bold);
    color: var(--color-gold-dark);
}
.price-lg {
    font-size: var(--text-2xl);
}
.price-old {
    font-weight: var(--font-normal);
    color: var(--gray-400);
    text-decoration: line-through;
    font-size: var(--text-sm);
}
.price-discount {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-2);
    background: var(--color-danger-light);
    color: var(--color-danger);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-sm);
}
.price-free {
    font-weight: var(--font-bold);
    color: var(--color-success);
}

/* Progress bar */
.progress {
    width: 100%;
    height: 8px;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    overflow: hidden;
}
.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-gold), var(--color-gold-light));
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}
.progress-bar.success {
    background: linear-gradient(90deg, var(--color-success), var(--color-success-dark));
}
.progress.sm {
    height: 4px;
}
.progress.lg {
    height: 12px;
}

/* Screen reader only */
.sr-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border-width: 0 !important;
}

/* Overflow */
.overflow-hidden { overflow: hidden !important; }
.overflow-auto { overflow: auto !important; }
.overflow-x-auto { overflow-x: auto !important; }
.overflow-y-auto { overflow-y: auto !important; }

/* Visibility */
.visible { visibility: visible !important; }
.invisible { visibility: hidden !important; }
.opacity-0 { opacity: 0 !important; }
.opacity-50 { opacity: 0.5 !important; }
.opacity-100 { opacity: 1 !important; }

/* Cursor */
.cursor-pointer { cursor: pointer !important; }
.cursor-default { cursor: default !important; }
.pointer-events-none { pointer-events: none !important; }

/* Borders */
.border { border: 1px solid var(--gray-200) !important; }
.border-0 { border: 0 !important; }
.border-top { border-top: 1px solid var(--gray-200) !important; }
.border-bottom { border-bottom: 1px solid var(--gray-200) !important; }
.border-gold { border-color: var(--color-gold) !important; }

/* Rounded */
.rounded-sm { border-radius: var(--radius-sm) !important; }
.rounded-md { border-radius: var(--radius-md) !important; }
.rounded-lg { border-radius: var(--radius-lg) !important; }
.rounded-xl { border-radius: var(--radius-xl) !important; }
.rounded-2xl { border-radius: var(--radius-2xl) !important; }
.rounded-full { border-radius: var(--radius-full) !important; }
.rounded-0 { border-radius: 0 !important; }

/* Shadow */
.shadow-none { box-shadow: none !important; }
.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow-md { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }
.shadow-xl { box-shadow: var(--shadow-xl) !important; }

/* Background */
.bg-white { background-color: var(--color-white) !important; }
.bg-primary { background-color: var(--color-primary) !important; }
.bg-gold { background-color: var(--color-gold) !important; }
.bg-light { background-color: var(--color-bg) !important; }
.bg-transparent { background-color: transparent !important; }
.bg-success-light { background-color: var(--color-success-light) !important; }
.bg-danger-light { background-color: var(--color-danger-light) !important; }
.bg-warning-light { background-color: var(--color-warning-light) !important; }
.bg-info-light { background-color: var(--color-info-light) !important; }

/* ==========================================================================
   19. RESPONSIVE UTILITIES
   ========================================================================== */
/* Show/hide at breakpoints */
@media (max-width: 575.98px) {
    .d-sm-none { display: none !important; }
}
@media (min-width: 576px) {
    .d-sm-block { display: block !important; }
    .d-sm-flex { display: flex !important; }
    .d-sm-none-up { display: none !important; }
}
@media (max-width: 767.98px) {
    .d-md-none { display: none !important; }
}
@media (min-width: 768px) {
    .d-md-block { display: block !important; }
    .d-md-flex { display: flex !important; }
    .d-md-none-up { display: none !important; }
}
@media (max-width: 991.98px) {
    .d-lg-none { display: none !important; }
}
@media (min-width: 992px) {
    .d-lg-block { display: block !important; }
    .d-lg-flex { display: flex !important; }
    .d-lg-none-up { display: none !important; }
}
@media (max-width: 1199.98px) {
    .d-xl-none { display: none !important; }
}
@media (min-width: 1200px) {
    .d-xl-block { display: block !important; }
    .d-xl-flex { display: flex !important; }
}