/* Orator's Guild - Premium Unified Stylesheet */

/* ============================================================
   CSS CUSTOM PROPERTIES - THEME SYSTEM
   ============================================================ */

:root {
  /* Light Theme Colors */
  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F8F9FA;
  --color-bg-tertiary: #F0F1F3;
  --color-text-primary: #1a1a2e;
  --color-text-secondary: #555555;
  --color-text-muted: #888888;
  --color-brand-primary: #0A2463;
  --color-brand-accent: #E2B616;
  --color-brand-light: #E8EDF5;
  --color-border: #e0e0e0;
  --color-shadow: rgba(10, 36, 99, 0.08);
  --color-overlay: rgba(0, 0, 0, 0.5);

  /* Typography */
  --font-serif: 'Crimson Text', Georgia, serif;
  --font-sans: 'Poppins', 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --font-chinese: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;

  /* 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: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index */
  --z-dropdown: 100;
  --z-modal: 500;
  --z-tooltip: 600;
}

/* Dark Theme */
[data-theme="dark"] {
  --color-bg-primary: #0f1419;
  --color-bg-secondary: #1a1f2e;
  --color-bg-tertiary: #252d3d;
  --color-text-primary: #e8e8e8;
  --color-text-secondary: #b0b0b0;
  --color-text-muted: #808080;
  --color-border: #404854;
  --color-shadow: rgba(0, 0, 0, 0.4);
  --color-overlay: rgba(0, 0, 0, 0.8);
  --color-brand-light: #1a2847;
}

/* ============================================================
   GLOBAL STYLES
   ============================================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-base), color var(--transition-base);
  font-size: 16px;
}

body.zh-lang {
  font-family: var(--font-chinese), var(--font-sans);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  color: var(--color-brand-primary);
  font-weight: 700;
  line-height: 1.2;
}

[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4,
[data-theme="dark"] h5,
[data-theme="dark"] h6 {
  color: #f0e6d2;
}

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

a {
  color: var(--color-brand-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-brand-accent);
}

/* ============================================================
   HEADER & NAVIGATION
   ============================================================ */

header {
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 8px var(--color-shadow);
  transition: all var(--transition-base);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
}

.navbar-brand {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-brand-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

[data-theme="dark"] .navbar-brand {
  color: #f0e6d2;
}

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

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

.nav-item a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-brand-accent);
  transition: width var(--transition-base);
}

.nav-item a:hover::after {
  width: 100%;
}

.nav-controls {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

/* Language & Theme Switcher */
.lang-switcher, .theme-switcher {
  display: inline-flex;
  align-items: center;
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-xs) var(--spacing-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.85rem;
  font-weight: 600;
}

.lang-switcher:hover, .theme-switcher:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-brand-accent);
}

.lang-option {
  padding: var(--spacing-xs) var(--spacing-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-option.active {
  background: var(--color-brand-accent);
  color: var(--color-brand-primary);
  border-radius: var(--radius-sm);
  font-weight: 700;
}

.theme-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.5;
  transition: opacity var(--transition-fast);
}

.theme-icon.active {
  opacity: 1;
}

/* Hamburger Menu */
.navbar-toggler {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  gap: 4px;
}

.navbar-toggler span {
  width: 24px;
  height: 2.5px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

@media (max-width: 768px) {
  .navbar-toggler {
    display: flex;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-secondary);
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
  }

  .nav-menu.active {
    display: flex;
  }

  .enroll-btn {
    display: none;
  }
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  font-weight: 600;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--color-brand-primary);
  color: white;
  border-color: var(--color-brand-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px var(--color-shadow);
  background: #081c4a;
}

.btn-accent {
  background: var(--color-brand-accent);
  color: var(--color-brand-primary);
  border-color: var(--color-brand-accent);
  font-weight: 700;
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(226, 182, 22, 0.3);
  background: #c9a313;
}

.btn-outline {
  background: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn-outline:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-brand-accent);
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 0.875rem;
}

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

/* ============================================================
   HERO SECTION
   ============================================================ */

.hero {
  position: relative;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
  text-align: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-overlay);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  color: white;
  animation: fadeInUp 0.8s ease-out;
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 4rem);
  color: white;
  margin-bottom: var(--spacing-lg);
  font-weight: 700;
}

.hero p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: var(--spacing-2xl);
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================
   BENTO GRID LAYOUTS
   ============================================================ */

.grid {
  display: grid;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-3xl);
}

.grid-cols-1 {
  grid-template-columns: 1fr;
}

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

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

.grid-cols-auto {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* Bento spans */
.span-2 {
  grid-column: span 2;
}

.span-2-rows {
  grid-row: span 2;
}

@media (max-width: 1024px) {
  .grid-cols-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-cols-2 {
    grid-template-columns: 1fr;
  }

  .span-2 {
    grid-column: span 1;
  }
}

@media (max-width: 640px) {
  .grid {
    gap: var(--spacing-md);
  }

  .grid-cols-3, .grid-cols-2, .grid-cols-auto {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   CARDS & TILES
   ============================================================ */

.card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  height: 100%;
  box-shadow: 0 2px 8px var(--color-shadow);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px var(--color-shadow);
  border-color: var(--color-brand-accent);
}

.card-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-brand-primary);
}

[data-theme="dark"] .card-title {
  color: #f0e6d2;
}

.card-text {
  flex-grow: 1;
  margin-bottom: var(--spacing-lg);
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  margin-top: auto;
}

.badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--color-brand-light);
  color: var(--color-brand-primary);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

[data-theme="dark"] .badge {
  background: var(--color-bg-tertiary);
  color: #f0e6d2;
}

/* ============================================================
   SECTIONS
   ============================================================ */

section {
  padding: var(--spacing-3xl) var(--spacing-lg);
}

section.bg-light {
  background: var(--color-bg-secondary);
}

section h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-2xl);
  text-align: center;
}

section p {
  max-width: 800px;
  margin: var(--spacing-lg) auto;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* ============================================================
   TESTIMONIALS
   ============================================================ */

.testimonial {
  background: var(--color-brand-light);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  text-align: center;
  border-left: 4px solid var(--color-brand-accent);
}

[data-theme="dark"] .testimonial {
  background: var(--color-bg-tertiary);
  border-left-color: var(--color-brand-accent);
}

.testimonial-text {
  font-size: 1.1rem;
  font-style: italic;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-primary);
}

.testimonial-author {
  font-weight: 700;
  color: var(--color-brand-primary);
}

[data-theme="dark"] .testimonial-author {
  color: #f0e6d2;
}

.testimonial-role {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ============================================================
   FORMS
   ============================================================ */

form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--color-text-primary);
}

input[type="text"],
input[type="email"],
input[type="phone"],
textarea,
select {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 1rem;
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  transition: border-color var(--transition-fast);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="phone"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-brand-accent);
  box-shadow: 0 0 0 3px var(--color-brand-light);
}

textarea {
  resize: vertical;
  min-height: 150px;
}

/* ============================================================
   FOOTER
   ============================================================ */

footer {
  background: var(--color-brand-primary);
  color: white;
  padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-lg);
  margin-top: var(--spacing-3xl);
  border-top: 1px solid var(--color-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-section h6 {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-md);
  font-family: var(--font-sans);
  color: var(--color-brand-accent);
}

.footer-section p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-sm);
  font-size: 0.95rem;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-fast);
}

.footer-section a:hover {
  color: var(--color-brand-accent);
}

.footer-divider {
  width: 60px;
  height: 3px;
  background: var(--color-brand-accent);
  margin-bottom: var(--spacing-lg);
  border-radius: 2px;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
}

/* ============================================================
   ANIMATIONS
   ============================================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

.animate-fade-up {
  animation: fadeInUp 0.6s ease-out;
}

.animate-slide-left {
  animation: slideInLeft 0.6s ease-out;
}

.animate-slide-right {
  animation: slideInRight 0.6s ease-out;
}

/* Stagger animations */
.stagger > * {
  opacity: 0;
  animation: fadeInUp 0.6s ease-out forwards;
}

.stagger > :nth-child(1) { animation-delay: 0.1s; }
.stagger > :nth-child(2) { animation-delay: 0.2s; }
.stagger > :nth-child(3) { animation-delay: 0.3s; }
.stagger > :nth-child(4) { animation-delay: 0.4s; }
.stagger > :nth-child(5) { animation-delay: 0.5s; }

/* ============================================================
   UTILITY CLASSES
   ============================================================ */

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

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

.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }
.mt-3xl { margin-top: var(--spacing-3xl); }

.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }
.mb-3xl { margin-bottom: var(--spacing-3xl); }

.py-lg {
  padding-top: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
}

.py-2xl {
  padding-top: var(--spacing-2xl);
  padding-bottom: var(--spacing-2xl);
}

.py-3xl {
  padding-top: var(--spacing-3xl);
  padding-bottom: var(--spacing-3xl);
}

.max-w-container {
  max-width: 1400px;
  margin: 0 auto;
}

.shadow-sm {
  box-shadow: 0 2px 8px var(--color-shadow);
}

.shadow-md {
  box-shadow: 0 6px 16px var(--color-shadow);
}

.shadow-lg {
  box-shadow: 0 12px 32px var(--color-shadow);
}

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

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1024px) {
  section {
    padding: var(--spacing-2xl) var(--spacing-lg);
  }

  section h2 {
    font-size: 2rem;
  }

  h1 {
    font-size: clamp(1.75rem, 6vw, 3rem);
  }
}

@media (max-width: 768px) {
  section {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  section h2 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-xl);
  }

  .hero {
    min-height: 500px;
    padding: var(--spacing-2xl) var(--spacing-md);
  }

  .hero h1 {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
  }

  .hero p {
    font-size: 1rem;
  }

  .nav-menu {
    gap: var(--spacing-md);
  }

  .grid {
    gap: var(--spacing-md);
  }

  .card {
    padding: var(--spacing-md);
  }

  .btn {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 0.95rem;
  }
}

@media (max-width: 480px) {
  :root {
    font-size: 14px;
  }

  section {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .hero-buttons {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .hero-buttons .btn {
    width: 100%;
  }

  nav {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }
}

/* ============================================================
   PRINT STYLES
   ============================================================ */

@media print {
  body {
    background: white;
    color: black;
  }

  .no-print, header, footer {
    display: none;
  }

  a {
    text-decoration: underline;
  }

  section {
    page-break-inside: avoid;
  }
}