/* 23WIN Vietnam - Design System */
/* Brand Colors: Gold & Dark Theme - Luxury Casino */

:root {
  /* Primary Colors */
  --primary-gold: #FFD700;
  --primary-gold-dark: #B8860B;
  --primary-gold-light: #FFF8DC;

  /* Dark Theme */
  --bg-dark: #0D0D0D;
  --bg-dark-secondary: #1A1A1A;
  --bg-dark-tertiary: #2D2D2D;
  --bg-gradient: linear-gradient(135deg, #0D0D0D 0%, #1A1A1A 50%, #2D2D2D 100%);

  /* Accent Colors */
  --accent-red: #DC143C;
  --accent-green: #32CD32;
  --accent-purple: #8B5CF6;

  /* Text Colors */
  --text-primary: #FFFFFF;
  --text-secondary: #B8B8B8;
  --text-muted: #6B7280;
  --text-gold: #FFD700;

  /* Status Colors */
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  --info: #3B82F6;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.5);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.5);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.5);
  --shadow-gold: 0 0 20px rgba(255,215,0,0.3);

  /* Typography */
  --font-primary: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;

  /* Container */
  --container-max: 1200px;
  --container-padding: 1rem;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-primary);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--text-gold);
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--text-primary);
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  color: var(--text-primary);
}

h4 {
  font-size: 1.125rem;
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

a {
  color: var(--primary-gold);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--primary-gold-light);
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13, 13, 13, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 215, 0, 0.2);
  padding: var(--spacing-md) 0;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-gold);
  text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.logo span {
  color: var(--text-primary);
}

/* Navigation */
.nav {
  display: none;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--spacing-sm) 0;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-gold);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-gold);
  transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Mobile Menu Button */
.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.menu-toggle span {
  display: block;
  width: 25px;
  height: 2px;
  background: var(--primary-gold);
  transition: all 0.3s ease;
}

/* Mobile Navigation */
.mobile-nav {
  display: none;
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-dark);
  padding: var(--spacing-xl);
  z-index: 999;
}

.mobile-nav.active {
  display: block;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.mobile-nav-link {
  display: block;
  padding: var(--spacing-md);
  color: var(--text-primary);
  font-size: 1.125rem;
  border-bottom: 1px solid var(--bg-dark-tertiary);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  padding: var(--spacing-3xl) 0;
  background: var(--bg-gradient);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    linear-gradient(135deg, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.3) 50%, transparent 100%),
    radial-gradient(circle at 30% 20%, rgba(255, 215, 0, 0.15) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 215, 0, 0.1);
  border: 1px solid var(--primary-gold);
  color: var(--primary-gold);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: var(--spacing-lg);
}

.hero-title .highlight {
  color: var(--primary-gold);
  text-shadow: 0 0 30px rgba(255, 215, 0, 0.5);
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

.hero-image {
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-50%);
  width: 50%;
  max-width: 600px;
  z-index: 0;
  opacity: 0.8;
}

.hero-image img {
  width: 100%;
  height: auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  min-height: 48px;
  min-width: 48px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-gold) 0%, var(--primary-gold-dark) 100%);
  color: var(--bg-dark);
  box-shadow: var(--shadow-gold);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(255, 215, 0, 0.5);
  color: var(--bg-dark);
}

.btn-secondary {
  background: transparent;
  color: var(--primary-gold);
  border: 2px solid var(--primary-gold);
}

.btn-secondary:hover {
  background: var(--primary-gold);
  color: var(--bg-dark);
}

.btn-large {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: 1.125rem;
}

.btn-block {
  width: 100%;
}

/* CTA Button Floating */
.cta-floating {
  position: fixed;
  bottom: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%);
  z-index: 900;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.4);
  }
  50% {
    box-shadow: 0 0 40px rgba(255, 215, 0, 0.8);
  }
}

/* Cards */
.card {
  background: var(--bg-dark-secondary);
  border: 1px solid var(--bg-dark-tertiary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  transition: all 0.3s ease;
}

.card:hover {
  border-color: var(--primary-gold);
  box-shadow: var(--shadow-gold);
  transform: translateY(-4px);
}

.card-icon {
  width: 60px;
  height: 60px;
  background: rgba(255, 215, 0, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
}

.card-icon svg,
.card-icon img {
  width: 32px;
  height: 32px;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.card-description {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* Feature Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin: var(--spacing-2xl) 0;
}

/* Steps */
.steps {
  counter-reset: step;
}

.step {
  position: relative;
  padding-left: 80px;
  margin-bottom: var(--spacing-xl);
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 50px;
  height: 50px;
  background: var(--primary-gold);
  color: var(--bg-dark);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
}

.step-title {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xs);
}

.step-description {
  color: var(--text-secondary);
}

/* Tables */
.table-container {
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--bg-dark-tertiary);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-dark-secondary);
}

th, td {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  border-bottom: 1px solid var(--bg-dark-tertiary);
}

th {
  background: var(--bg-dark-tertiary);
  color: var(--primary-gold);
  font-weight: 600;
}

tr:hover {
  background: rgba(255, 215, 0, 0.05);
}

/* FAQ Accordion */
.faq-item {
  border: 1px solid var(--bg-dark-tertiary);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: var(--spacing-lg);
  background: var(--bg-dark-secondary);
  border: none;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.3s ease;
}

.faq-question:hover {
  background: var(--bg-dark-tertiary);
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--primary-gold);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 var(--spacing-lg);
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
  padding: var(--spacing-lg);
  max-height: 500px;
}

/* Sections */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Highlight Box */
.highlight-box {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.1) 0%, rgba(255, 215, 0, 0.05) 100%);
  border: 1px solid var(--primary-gold);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
}

.highlight-box-title {
  color: var(--primary-gold);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
}

/* Warning Box */
.warning-box {
  background: rgba(239, 68, 68, 0.1);
  border-left: 4px solid var(--error);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* Success Box */
.success-box {
  background: rgba(16, 185, 129, 0.1);
  border-left: 4px solid var(--success);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* Info Box */
.info-box {
  background: rgba(59, 130, 246, 0.1);
  border-left: 4px solid var(--info);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* Tip Box */
.tip-box {
  background: rgba(255, 215, 0, 0.1);
  border-left: 4px solid var(--primary-gold);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* Lists */
.list-check {
  list-style: none;
}

.list-check li {
  position: relative;
  padding-left: 30px;
  margin-bottom: var(--spacing-sm);
}

.list-check li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: bold;
}

/* Footer */
.footer {
  background: var(--bg-dark-secondary);
  border-top: 1px solid var(--bg-dark-tertiary);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
  color: var(--primary-gold);
  margin-bottom: var(--spacing-lg);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--bg-dark-tertiary);
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Responsible Gambling Badge */
.responsible-gambling {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  margin-top: var(--spacing-lg);
}

.responsible-gambling-icon {
  width: 40px;
  height: 40px;
  background: var(--warning);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: var(--bg-dark);
}

.responsible-gambling-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-secondary);
}

.breadcrumb span {
  color: var(--text-muted);
}

/* Content */
.content {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--container-padding);
}

.content h2 {
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--bg-dark-tertiary);
}

.content h3 {
  margin-top: var(--spacing-xl);
  color: var(--primary-gold);
}

.content ul, .content ol {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-xl);
}

.content li {
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

/* Payment Icons */
.payment-methods {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.payment-method {
  background: var(--bg-dark-secondary);
  border: 1px solid var(--bg-dark-tertiary);
  border-radius: var(--radius-md);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.payment-method img {
  height: 24px;
  width: auto;
}

/* Responsive */
@media (min-width: 768px) {
  .nav {
    display: block;
  }

  .menu-toggle {
    display: none;
  }

  .hero-image {
    opacity: 1;
  }

  .hero-content {
    max-width: 50%;
  }
}

@media (min-width: 1024px) {
  :root {
    --container-padding: 2rem;
  }

  .hero {
    min-height: 80vh;
  }
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .cta-floating,
  .btn {
    display: none;
  }

  body {
    background: white;
    color: black;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease forwards;
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}