/* ==========================================================================
   360Party - Main Layout & Core Styling
   Brand: 360Party | Hạ Long, Vietnam | 360p.vn
   ========================================================================== */

@import url('./themes.css');

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  transition: all 0.2s ease;
}

ul, ol {
  list-style: none;
}

/* --------------------------------------------------------------------------
   2. Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); }
h4 { font-size: 1.25rem; }

p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.text-gradient {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.text-gold { color: var(--accent-gold); }
.text-cyan { color: var(--accent-cyan); }
.text-muted { color: var(--text-muted); }

/* --------------------------------------------------------------------------
   3. Container & Layout Helpers
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: 96px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 60px auto;
}

.section-subtitle {
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  font-weight: 700;
  color: var(--accent-gold);
  margin-bottom: 12px;
  display: inline-block;
}

.section-title {
  margin-bottom: 18px;
}

.section-desc {
  font-size: 1.12rem;
}

/* --------------------------------------------------------------------------
   4. Buttons & Badges
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  font-size: 0.98rem;
  font-weight: 600;
  border-radius: 999px;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: var(--accent-primary-text);
  box-shadow: 0 4px 20px var(--accent-gold-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--accent-gold-glow);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: var(--bg-elevated);
  border-color: var(--accent-gold);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--accent-gold);
  border: 1px solid var(--accent-gold);
}

.btn-outline:hover {
  background: var(--accent-gold);
  color: var(--accent-primary-text);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: 999px;
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
}

.badge-demo {
  background: var(--demo-badge-bg);
  color: var(--demo-badge-text);
  border: 1px solid var(--demo-badge-border);
}

/* --------------------------------------------------------------------------
   5. Site Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(16px);
  transition: all 0.3s ease;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

/* Brand Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.45rem;
  color: var(--text-primary);
}

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px var(--accent-gold-glow);
  position: relative;
  overflow: hidden;
}

.brand-icon svg {
  width: 24px;
  height: 24px;
  fill: var(--accent-primary-text);
  transition: transform 0.5s ease;
}

.brand-logo:hover .brand-icon svg {
  transform: rotate(180deg);
}

.brand-title {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand-title-main {
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -0.03em;
}

.brand-title-sub {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin-top: 3px;
}

/* Nav Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gold);
  transition: width 0.25s ease;
}

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

/* Header Controls: Theme & Language */
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.theme-switch-group,
.lang-switch-group {
  display: flex;
  align-items: center;
  background: var(--bg-glass-input);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  padding: 3px;
}

.control-btn {
  padding: 6px 12px;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 999px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 5px;
}

.control-btn:hover {
  color: var(--text-primary);
}

.control-btn.active {
  background: var(--accent-gold);
  color: var(--accent-primary-text);
  box-shadow: 0 2px 8px var(--accent-gold-glow);
}

/* Mobile Nav Toggle */
.mobile-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--bg-glass-input);
  border: 1px solid var(--border-subtle);
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
}

.mobile-toggle svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
}

/* --------------------------------------------------------------------------
   6. Mobile Drawer Menu
   -------------------------------------------------------------------------- */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: min(85vw, 360px);
  height: 100vh;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-medium);
  z-index: 2000;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: right 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.6);
  overflow-y: auto;
}

.mobile-drawer.open {
  right: 0;
}

.drawer-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.drawer-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.drawer-close-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.drawer-links {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.drawer-link {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.drawer-link:hover,
.drawer-link.active {
  color: var(--accent-gold);
}

.drawer-controls {
  padding-top: 28px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* --------------------------------------------------------------------------
   7. Demo Mode Banner
   -------------------------------------------------------------------------- */
.demo-banner {
  background: var(--demo-badge-bg);
  border-bottom: 1px solid var(--demo-badge-border);
  color: var(--demo-badge-text);
  font-size: 0.85rem;
  padding: 8px 16px;
  text-align: center;
  font-weight: 500;
}

.demo-banner a {
  text-decoration: underline;
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   8. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 80px 0 40px 0;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-col-brand p {
  margin: 18px 0 24px 0;
  max-width: 320px;
  font-size: 0.95rem;
}

.footer-heading {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.footer-link:hover {
  color: var(--accent-gold);
  transform: translateX(4px);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 12px;
}

.footer-contact-item svg {
  width: 18px;
  height: 18px;
  fill: var(--accent-gold);
  flex-shrink: 0;
  margin-top: 3px;
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-legal-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

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

/* --------------------------------------------------------------------------
   9. Media Queries (Responsive)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .nav-menu {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 640px) {
  .header-container {
    height: 70px;
  }
  .section {
    padding: 64px 0;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .footer-legal-links {
    justify-content: center;
    flex-wrap: wrap;
  }
}

/* Reduced motion preference */
@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;
  }
}