/**
 * Theater Ticket Booking - CSS Style
 * Inspired by Claude Design System (Anthropic)
 * Warm parchment aesthetic with terracotta accents
 */

/* ============================================================
   CSS VARIABLES - Claude Color System
   ============================================================ */
:root {
    /* Brand Colors */
    --color-near-black: #141413;
    --color-terracotta: #c96442;
    --color-coral: #d97757;

    /* Semantic Colors */
    --color-error: #b53333;
    --color-success: #2d7a4f;
    --color-focus-blue: #3898ec;

    /* Surface Colors */
    --color-parchment: #f5f4ed;
    --color-ivory: #faf9f5;
    --color-white: #ffffff;
    --color-warm-sand: #e8e6dc;

    /* Dark Surfaces */
    --color-dark-surface: #30302e;
    --color-deep-dark: #141413;

    /* Text Colors */
    --color-charcoal: #4d4c48;
    --color-olive: #5e5d59;
    --color-stone: #87867f;
    --color-dark-text: #3d3d3a;
    --color-warm-silver: #b0aea5;

    /* Borders */
    --color-border-cream: #f0eee6;
    --color-border-warm: #e8e6dc;
    --color-border-dark: #30302e;
    --color-ring-warm: #d1cfc5;
    --color-ring-subtle: #dedc01;

    /* Seat Colors */
    --seat-available: #2d7a4f;
    --seat-selected: #c96442;
    --seat-booked: #b0aea5;
    --seat-vip: #8b6914;
    --seat-premium: #3898ec;

    /* Shadows */
    --shadow-whisper: 0px 4px 24px rgba(0, 0, 0, 0.05);
    --shadow-ring: 0px 0px 0px 1px;

    /* Border Radius */
    --radius-sharp: 4px;
    --radius-subtle: 6px;
    --radius-comfortable: 8px;
    --radius-generous: 12px;
    --radius-very-rounded: 16px;
    --radius-highly-rounded: 24px;
    --radius-maximum: 32px;

    /* Spacing */
    --space-xs: 3px;
    --space-sm: 4px;
    --space-md: 8px;
    --space-lg: 12px;
    --space-xl: 16px;
    --space-2xl: 20px;
    --space-3xl: 24px;
    --space-4xl: 30px;
    --space-5xl: 40px;
    --space-6xl: 60px;
    --space-7xl: 80px;

    /* Typography */
    --font-serif: Georgia, 'Times New Roman', serif;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    --font-mono: 'Courier New', Courier, monospace;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-parchment);
    color: var(--color-near-black);
    line-height: 1.60;
    min-height: 100vh;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-terracotta);
}

/* ============================================================
   TYPOGRAPHY - Serif for Headlines, Sans for UI
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 500;
    line-height: 1.20;
    color: var(--color-near-black);
}

h1 {
    font-size: 3.25rem;
    line-height: 1.10;
}

h2 {
    font-size: 2.3rem;
    line-height: 1.25;
}

h3 {
    font-size: 2rem;
    line-height: 1.10;
}

h4 {
    font-size: 1.6rem;
}

h5 {
    font-size: 1.3rem;
}

h6 {
    font-size: 1.06rem;
}

p {
    margin-bottom: var(--space-lg);
}

.text-serif {
    font-family: var(--font-serif);
}

.text-sans {
    font-family: var(--font-sans);
}

.text-olive {
    color: var(--color-olive);
}

.text-stone {
    color: var(--color-stone);
}

.text-terracotta {
    color: var(--color-terracotta);
}

/* ============================================================
   LAYOUT - Container & Grid
   ============================================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.container-narrow {
    max-width: 800px;
}

.container-wide {
    max-width: 1400px;
}

.section {
    padding: var(--space-7xl) 0;
}

.section-dark {
    background-color: var(--color-near-black);
    color: var(--color-ivory);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4,
.section-dark h5,
.section-dark h6 {
    color: var(--color-ivory);
}

.grid {
    display: grid;
    gap: var(--space-3xl);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 991px) {
    .grid-3, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   NAVIGATION - Sticky Top Nav
   ============================================================ */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--color-parchment);
    border-bottom: 1px solid var(--color-border-warm);
    padding: var(--space-lg) 0;
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-xl);
}

.navbar-brand {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-near-black);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.navbar-brand:hover {
    color: var(--color-terracotta);
}

.navbar-brand-icon {
    width: 40px;
    height: 40px;
    background-color: var(--color-terracotta);
    border-radius: var(--radius-generous);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-ivory);
    font-size: 1.2rem;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--space-3xl);
    list-style: none;
}

.navbar-nav a {
    font-size: 1rem;
    color: var(--color-olive);
    transition: color 0.2s ease;
}

.navbar-nav a:hover,
.navbar-nav a.active {
    color: var(--color-near-black);
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-generous);
    background-color: var(--color-warm-sand);
    color: var(--color-charcoal);
    font-size: 0.94rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.user-menu:hover {
    background-color: var(--color-border-warm);
}

/* Mobile Navigation */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-near-black);
    cursor: pointer;
}

@media (max-width: 767px) {
    .nav-toggle {
        display: block;
    }

    .navbar-nav,
    .navbar-actions {
        display: none;
    }

    .navbar-nav.active,
    .navbar-actions.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-parchment);
        border-bottom: 1px solid var(--color-border-warm);
        padding: var(--space-xl);
        gap: var(--space-xl);
    }
}

/* ============================================================
   BUTTONS - Warm Sand, White, Dark, Terracotta, Dark Primary
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-lg) var(--space-2xl);
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    line-height: 1;
    border: none;
    border-radius: var(--radius-generous);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

/* Warm Sand Button (Secondary) */
.btn-secondary {
    background-color: var(--color-warm-sand);
    color: var(--color-charcoal);
    box-shadow: var(--shadow-ring) var(--color-warm-sand), var(--shadow-ring) var(--color-ring-warm);
}

.btn-secondary:hover {
    background-color: var(--color-border-warm);
    color: var(--color-charcoal);
    box-shadow: var(--shadow-ring) var(--color-border-warm), var(--shadow-ring) var(--color-ring-warm);
}

/* White Surface Button */
.btn-white {
    background-color: var(--color-white);
    color: var(--color-near-black);
    box-shadow: var(--shadow-whisper);
}

.btn-white:hover {
    background-color: var(--color-ivory);
    color: var(--color-near-black);
}

/* Dark Charcoal Button */
.btn-dark {
    background-color: var(--color-dark-surface);
    color: var(--color-ivory);
}

.btn-dark:hover {
    background-color: var(--color-near-black);
    color: var(--color-ivory);
}

/* Terracotta Brand Button (Primary CTA) */
.btn-primary {
    background-color: var(--color-terracotta);
    color: var(--color-ivory);
    box-shadow: var(--shadow-ring) var(--color-terracotta);
}

.btn-primary:hover {
    background-color: #b85a3a;
    color: var(--color-ivory);
    box-shadow: var(--shadow-ring) #b85a3a;
}

/* Dark Primary Button */
.btn-dark-primary {
    background-color: var(--color-near-black);
    color: var(--color-warm-silver);
    border: 1px solid var(--color-dark-surface);
}

.btn-dark-primary:hover {
    background-color: var(--color-dark-surface);
    color: var(--color-ivory);
}

/* Outline Button */
.btn-outline {
    background-color: transparent;
    color: var(--color-terracotta);
    border: 1px solid var(--color-terracotta);
}

.btn-outline:hover {
    background-color: var(--color-terracotta);
    color: var(--color-ivory);
}

/* Button Sizes */
.btn-sm {
    padding: var(--space-md) var(--space-xl);
    font-size: 0.88rem;
    border-radius: var(--radius-comfortable);
}

.btn-lg {
    padding: var(--space-xl) var(--space-3xl);
    font-size: 1.06rem;
}

.btn-block {
    width: 100%;
}

/* Button States */
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

/* ============================================================
   CARDS & CONTAINERS
   ============================================================ */
.card {
    background-color: var(--color-ivory);
    border: 1px solid var(--color-border-cream);
    border-radius: var(--radius-comfortable);
    padding: var(--space-3xl);
    transition: all 0.2s ease;
}

.card-elevated {
    box-shadow: var(--shadow-whisper);
}

.card-interactive:hover {
    box-shadow: 0px 0px 0px 1px var(--color-ring-warm), var(--shadow-whisper);
    transform: translateY(-2px);
}

.card-dark {
    background-color: var(--color-dark-surface);
    border: 1px solid var(--color-border-dark);
}

.card-header {
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--color-border-warm);
}

.card-title {
    font-size: 1.3rem;
    margin-bottom: var(--space-sm);
}

.card-subtitle {
    font-size: 0.94rem;
    color: var(--color-olive);
}

.card-body {
    margin-bottom: var(--space-xl);
}

.card-footer {
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border-warm);
}

/* ============================================================
   FORMS & INPUTS
   ============================================================ */
.form-group {
    margin-bottom: var(--space-xl);
}

.form-label {
    display: block;
    font-size: 0.94rem;
    font-weight: 500;
    color: var(--color-charcoal);
    margin-bottom: var(--space-md);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-near-black);
    background-color: var(--color-white);
    border: 1px solid var(--color-border-warm);
    border-radius: var(--radius-generous);
    transition: all 0.2s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-focus-blue);
    box-shadow: 0px 0px 0px 3px rgba(56, 152, 236, 0.2);
}

.form-input::placeholder {
    color: var(--color-stone);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: var(--color-error);
}

.form-error {
    display: block;
    font-size: 0.88rem;
    color: var(--color-error);
    margin-top: var(--space-sm);
}

.form-hint {
    display: block;
    font-size: 0.88rem;
    color: var(--color-stone);
    margin-top: var(--space-sm);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    cursor: pointer;
}

.form-check input {
    width: 20px;
    height: 20px;
    accent-color: var(--color-terracotta);
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
    padding: var(--space-7xl) 0;
    text-align: center;
    background-color: var(--color-parchment);
}

.hero-title {
    font-size: 4rem;
    line-height: 1.10;
    margin-bottom: var(--space-xl);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-olive);
    max-width: 600px;
    margin: 0 auto var(--space-3xl);
    line-height: 1.60;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    flex-wrap: wrap;
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }
}

/* ============================================================
   PLAY CARDS (Show Listings)
   ============================================================ */
.play-card {
    background-color: var(--color-ivory);
    border: 1px solid var(--color-border-cream);
    border-radius: var(--radius-very-rounded);
    overflow: hidden;
    transition: all 0.3s ease;
}

.play-card:hover {
    box-shadow: var(--shadow-whisper);
    transform: translateY(-4px);
}

.play-card-image {
    width: 100%;
    aspect-ratio: 2/3;
    object-fit: cover;
    background-color: var(--color-warm-sand);
}

.play-card-content {
    padding: var(--space-2xl);
}

.play-card-title {
    font-size: 1.3rem;
    margin-bottom: var(--space-md);
    line-height: 1.30;
}

.play-card-meta {
    font-size: 0.88rem;
    color: var(--color-olive);
    margin-bottom: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.play-card-price {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-terracotta);
    margin-bottom: var(--space-lg);
}

.play-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ============================================================
   SEAT SELECTION - Theater Seating
   ============================================================ */
.seat-legend {
    display: flex;
    justify-content: center;
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
    flex-wrap: wrap;
}

.seat-legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: 0.94rem;
    color: var(--color-olive);
}

.seat-legend-color {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-subtle);
}

.seat-legend-available {
    background-color: var(--seat-available);
}

.seat-legend-selected {
    background-color: var(--seat-selected);
}

.seat-legend-booked {
    background-color: var(--seat-booked);
}

.seat-legend-vip {
    background-color: var(--seat-vip);
}

.seat-legend-premium {
    background-color: var(--seat-premium);
}

.stage-indicator {
    text-align: center;
    margin-bottom: var(--space-4xl);
}

.stage-label {
    display: inline-block;
    padding: var(--space-lg) var(--space-5xl);
    background-color: var(--color-dark-surface);
    color: var(--color-warm-silver);
    font-family: var(--font-serif);
    font-size: 1rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    border-radius: var(--radius-maximum);
}

.seating-area {
    max-width: 100%;
    margin: 0 auto;
    overflow-x: auto;
    padding-bottom: 20px;
}

.seat-row {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.seat-row-label {
    width: 30px;
    font-weight: 600;
    color: var(--color-charcoal);
    text-align: center;
}

.seat-row-seats {
    display: flex;
    gap: var(--space-sm);
    flex: 1;
    justify-content: center;
}

.seat {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    flex-shrink: 0;
}

.seat-available {
    background-color: var(--seat-available);
    color: white;
}

.seat-available:hover {
    background-color: #236b42;
    transform: scale(1.1);
}

.seat-selected {
    background-color: var(--seat-selected);
    color: white;
    transform: scale(1.1);
    box-shadow: var(--shadow-ring) var(--color-terracotta);
}

.seat-booked {
    background-color: var(--seat-booked);
    color: white;
    cursor: not-allowed;
    opacity: 0.6;
}

.seat-vip {
    background-color: var(--seat-vip);
    color: white;
}

.seat-vip:hover {
    background-color: #7a5c10;
    transform: scale(1.1);
}

.seat-premium {
    background-color: var(--seat-premium);
    color: white;
}

.seat-premium:hover {
    background-color: #2a7ab8;
    transform: scale(1.1);
}

/* Seat Aisle (lối đi giữa các ghế) */
.seat-aisle {
    width: 20px;
    flex-shrink: 0;
}

/* ============================================================
   BOOKING SUMMARY
   ============================================================ */
.booking-summary {
    background-color: var(--color-ivory);
    border: 1px solid var(--color-border-cream);
    border-radius: var(--radius-comfortable);
    padding: var(--space-3xl);
}

.booking-summary-title {
    font-size: 1.3rem;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--color-border-warm);
}

.booking-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) 0;
}

.booking-item-label {
    color: var(--color-olive);
}

.booking-item-value {
    font-weight: 500;
}

.booking-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-xl);
    margin-top: var(--space-xl);
    border-top: 2px solid var(--color-border-warm);
    font-size: 1.2rem;
    font-weight: 600;
}

.booking-total-price {
    color: var(--color-terracotta);
    font-size: 1.4rem;
}

/* ============================================================
   PAYMENT & QR SECTION
   ============================================================ */
.qr-ticket {
    background-color: var(--color-white);
    border: 1px solid var(--color-border-cream);
    border-radius: var(--radius-very-rounded);
    padding: var(--space-3xl);
    text-align: center;
    box-shadow: var(--shadow-whisper);
}

.qr-ticket-image {
    width: 200px;
    height: 200px;
    margin: 0 auto var(--space-xl);
    border-radius: var(--radius-generous);
}

.qr-ticket-code {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    color: var(--color-near-black);
    margin-bottom: var(--space-lg);
    letter-spacing: 2px;
}

.qr-ticket-info {
    font-size: 0.94rem;
    color: var(--color-olive);
}

.qr-ticket-seat {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-charcoal);
    margin-bottom: var(--space-md);
}

/* ============================================================
   TICKET STATUS BADGES
   ============================================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-xs) var(--space-lg);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-highly-rounded);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-pending {
    background-color: #fff3cd;
    color: #856404;
}

.badge-confirmed {
    background-color: #d4edda;
    color: #155724;
}

.badge-cancelled {
    background-color: #f8d7da;
    color: #721c24;
}

.badge-used {
    background-color: var(--color-dark-surface);
    color: var(--color-warm-silver);
}

.badge-admin {
    background-color: var(--color-terracotta);
    color: var(--color-ivory);
}

.badge-customer {
    background-color: var(--color-olive);
    color: var(--color-ivory);
}

/* ============================================================
   ALERT & NOTIFICATION
   ============================================================ */
.alert {
    padding: var(--space-xl) var(--space-2xl);
    border-radius: var(--radius-generous);
    margin-bottom: var(--space-xl);
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
}

.alert-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.alert-success {
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.alert-error {
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

.alert-warning {
    background-color: #fff3cd;
    border: 1px solid #ffeeba;
    color: #856404;
}

.alert-info {
    background-color: #d1ecf1;
    border: 1px solid #bee5eb;
    color: #0c5460;
}

/* ============================================================
   TABLES
   ============================================================ */
.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: var(--space-xl);
    text-align: left;
    border-bottom: 1px solid var(--color-border-warm);
}

.table th {
    font-weight: 600;
    color: var(--color-charcoal);
    background-color: var(--color-warm-sand);
}

.table tbody tr:hover {
    background-color: var(--color-ivory);
}

.table td {
    color: var(--color-near-black);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
    background-color: var(--color-near-black);
    color: var(--color-warm-silver);
    padding: var(--space-6xl) 0 var(--space-3xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-4xl);
    margin-bottom: var(--space-4xl);
}

.footer-brand {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--color-ivory);
    margin-bottom: var(--space-lg);
}

.footer-description {
    color: var(--color-stone);
    line-height: 1.60;
}

.footer-title {
    font-family: var(--font-sans);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-ivory);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-xl);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.footer-links a {
    color: var(--color-stone);
    font-size: 0.94rem;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--color-ivory);
}

.footer-bottom {
    padding-top: var(--space-3xl);
    border-top: 1px solid var(--color-dark-surface);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-lg);
}

.footer-copyright {
    font-size: 0.88rem;
    color: var(--color-stone);
}

@media (max-width: 767px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 479px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   AUTH PAGES (Login, Register)
   ============================================================ */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3xl);
}

.auth-card {
    width: 100%;
    max-width: 480px;
    background-color: var(--color-ivory);
    border: 1px solid var(--color-border-cream);
    border-radius: var(--radius-very-rounded);
    padding: var(--space-4xl);
    box-shadow: var(--shadow-whisper);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
}

.auth-title {
    font-size: 2rem;
    margin-bottom: var(--space-md);
}

.auth-subtitle {
    color: var(--color-olive);
}

.auth-footer {
    text-align: center;
    margin-top: var(--space-3xl);
    padding-top: var(--space-3xl);
    border-top: 1px solid var(--color-border-warm);
    color: var(--color-olive);
    font-size: 0.94rem;
}

.auth-footer a {
    color: var(--color-terracotta);
    font-weight: 500;
}

/* ============================================================
   ADMIN DASHBOARD
   ============================================================ */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: 260px;
    background-color: var(--color-near-black);
    color: var(--color-warm-silver);
    padding: var(--space-3xl) 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.admin-sidebar-title {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    color: var(--color-ivory);
    padding: 0 var(--space-2xl);
    margin-bottom: var(--space-3xl);
}

.admin-nav {
    list-style: none;
}

.admin-nav-item {
    margin-bottom: var(--space-xs);
}

.admin-nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg) var(--space-2xl);
    color: var(--color-stone);
    font-size: 0.94rem;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.admin-nav-link:hover {
    color: var(--color-ivory);
    background-color: var(--color-dark-surface);
}

.admin-nav-link.active {
    color: var(--color-ivory);
    background-color: var(--color-dark-surface);
    border-left-color: var(--color-terracotta);
}

.admin-nav-icon {
    width: 20px;
    text-align: center;
}

.admin-main {
    flex: 1;
    margin-left: 260px;
    padding: var(--space-3xl);
    background-color: var(--color-parchment);
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-3xl);
}

.admin-title {
    font-size: 2rem;
}

.admin-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-2xl);
    margin-bottom: var(--space-4xl);
}

.stat-card {
    background-color: var(--color-ivory);
    border: 1px solid var(--color-border-cream);
    border-radius: var(--radius-comfortable);
    padding: var(--space-2xl);
}

.stat-label {
    font-size: 0.88rem;
    color: var(--color-olive);
    margin-bottom: var(--space-md);
}

.stat-value {
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-near-black);
}

.stat-change {
    font-size: 0.88rem;
    margin-top: var(--space-sm);
}

.stat-change-positive {
    color: var(--color-success);
}

.stat-change-negative {
    color: var(--color-error);
}

@media (max-width: 991px) {
    .admin-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    .admin-sidebar {
        display: none;
    }

    .admin-main {
        margin-left: 0;
    }
}

/* ============================================================
   QR SCANNER SECTION
   ============================================================ */
.qr-scanner-section {
    background-color: var(--color-ivory);
    border: 1px solid var(--color-border-cream);
    border-radius: var(--radius-very-rounded);
    padding: var(--space-4xl);
    text-align: center;
}

.qr-scanner-title {
    font-size: 1.6rem;
    margin-bottom: var(--space-xl);
}

.qr-scanner-input {
    max-width: 400px;
    margin: 0 auto var(--space-2xl);
}

.qr-scanner-result {
    margin-top: var(--space-3xl);
    padding: var(--space-3xl);
    border-radius: var(--radius-generous);
}

.qr-result-success {
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
}

.qr-result-error {
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
}

.qr-result-already-used {
    background-color: #fff3cd;
    border: 1px solid #ffeeba;
}

/* ============================================================
   PAGE HEADERS
   ============================================================ */
.page-header {
    padding: var(--space-4xl) 0;
    border-bottom: 1px solid var(--color-border-warm);
    margin-bottom: var(--space-4xl);
}

.page-title {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.page-subtitle {
    color: var(--color-olive);
    font-size: 1.1rem;
}

/* ============================================================
   UTILITIES
   ============================================================ */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-left {
    text-align: left;
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-xl); }
.mt-3 { margin-top: var(--space-2xl); }
.mt-4 { margin-top: var(--space-3xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-xl); }
.mb-3 { margin-bottom: var(--space-2xl); }
.mb-4 { margin-bottom: var(--space-3xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--space-md); }
.p-2 { padding: var(--space-xl); }
.p-3 { padding: var(--space-2xl); }
.p-4 { padding: var(--space-3xl); }

.pt-0 { padding-top: 0; }
.pt-1 { padding-top: var(--space-md); }
.pt-2 { padding-top: var(--space-xl); }
.pt-3 { padding-top: var(--space-2xl); }
.pt-4 { padding-top: var(--space-3xl); }
.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-xl); }
.mb-3 { margin-bottom: var(--space-2xl); }
.mb-4 { margin-bottom: var(--space-3xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--space-md); }
.p-2 { padding: var(--space-xl); }
.p-3 { padding: var(--space-2xl); }
.p-4 { padding: var(--space-3xl); }

.d-flex { display: flex; }
.d-block { display: block; }
.d-none { display: none; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: var(--space-md); }
.gap-2 { gap: var(--space-xl); }
.gap-3 { gap: var(--space-2xl); }

.w-full { width: 100%; }
.w-auto { width: auto; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.border-bottom { border-bottom: 1px solid var(--color-border-warm); }
.border-top { border-top: 1px solid var(--color-border-warm); }

.bg-ivory { background-color: var(--color-ivory); }
.bg-white { background-color: var(--color-white); }
.bg-parchment { background-color: var(--color-parchment); }
.bg-dark { background-color: var(--color-near-black); }

.rounded { border-radius: var(--radius-generous); }
.rounded-lg { border-radius: var(--radius-very-rounded); }
.rounded-full { border-radius: 50%; }

.cursor-pointer { cursor: pointer; }

/* Animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.3s ease forwards;
}

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

.pulse {
    animation: pulse 2s infinite;
}

/* ============================================================
   SHOW LIST CARD (LỊCH DIỄN)
   ============================================================ */
.show-list-card {
    display: flex;
    align-items: center;
    gap: 30px;
    padding: 24px;
}
.show-list-img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 12px;
    flex-shrink: 0;
}
.show-list-info {
    flex: 1;
    min-width: 0;
}
.show-list-title {
    font-size: 1.3rem;
    margin-bottom: 8px;
}
.show-list-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    color: var(--color-olive);
    font-size: 0.94rem;
}
.show-list-action {
    text-align: right;
    flex-shrink: 0;
}
.show-list-price {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-terracotta);
    margin-bottom: 12px;
}

@media (max-width: 767px) {
    .show-list-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        padding: 16px;
    }
    .show-list-img {
        width: 100%;
        height: 200px; /* Poster hiển thị đầy đủ hơn trên mobile */
    }
    .show-list-action {
        width: 100%;
        display: flex;
        justify-content: space-between;
        align-items: center;
        text-align: left;
    }
    .show-list-price {
        margin-bottom: 0;
    }
}