/* ==========================================================================
   ARKHANA DESIGN SYSTEM - WEB FOUNDATION
   Matches packages/presentation/design_system:
   Background: #050505 (OLED Black)
   Surface: #121217, Surface Highlight: #1c1c24
   Primary: #00CEC9 (Neon Turquoise)
   Secondary: #6C5CE7 (Deep Purple)
   Brand Gold: #F5C15C
   Text Primary: #F1F2F6, Text Secondary: #A4B0BE
   ========================================================================== */

:root {
  --bg: #050505;
  --bg-gradient: radial-gradient(circle at 50% 0%, #171032 0%, #08080c 50%, #050505 100%);
  --surface: #121217;
  --surface-card: rgba(18, 18, 23, 0.75);
  --surface-highlight: #1c1c24;
  --surface-glass: rgba(255, 255, 255, 0.04);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glass-glow: rgba(0, 206, 201, 0.3);

  --primary: #00CEC9;
  --primary-glow: rgba(0, 206, 201, 0.25);
  --secondary: #6C5CE7;
  --secondary-glow: rgba(108, 92, 231, 0.35);
  --brand-gold: #F5C15C;
  --brand-gold-glow: rgba(245, 193, 92, 0.25);

  --text-primary: #F1F2F6;
  --text-secondary: #A4B0BE;
  --text-muted: #747D8C;

  --success: #2ED573;
  --error: #FF4757;

  --font-main: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', 'Plus Jakarta Sans', sans-serif;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 9999px;

  --transition-smooth: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Background Animated Canvas */
#ambient-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.65;
}

/* Global Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Typography Helpers */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.gradient-text {
  background: linear-gradient(135deg, #F1F2F6 0%, #00CEC9 50%, #6C5CE7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gold-gradient-text {
  background: linear-gradient(135deg, #FFF 0%, #F5C15C 70%, #E67E22 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* Buttons & Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  background: rgba(108, 92, 231, 0.12);
  border: 1px solid rgba(108, 92, 231, 0.35);
  color: #A29BFE;
  backdrop-filter: blur(10px);
}

.badge-gold {
  background: rgba(245, 193, 92, 0.12);
  border-color: rgba(245, 193, 92, 0.35);
  color: var(--brand-gold);
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 10px var(--primary);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border-radius: var(--radius-full);
  font-family: var(--font-main);
  font-size: 0.98rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #0984e3 100%);
  color: #050505;
  box-shadow: 0 8px 24px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 206, 201, 0.45);
}

.btn-secondary {
  background: var(--surface-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(14px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-store {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 12px 22px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  color: #FFF;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.btn-store:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 206, 201, 0.2);
}

.btn-store svg {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.btn-store .store-sub {
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  display: block;
}

.btn-store .store-title {
  font-size: 1.1rem;
  font-weight: 700;
  display: block;
  line-height: 1.1;
}

/* Glass Cards */
.glass-card {
  background: var(--surface-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  padding: 32px;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.glass-card:hover {
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  background: rgba(5, 5, 5, 0.75);
  border-bottom: 1px solid var(--border-glass);
  padding: 18px 0;
  transition: var(--transition-smooth);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  box-shadow: 0 4px 14px rgba(0, 206, 201, 0.3);
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, #FFF 0%, #00CEC9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition-smooth);
}

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

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Hero Section */
.hero {
  padding: 90px 0 60px;
  text-align: center;
  position: relative;
}

.hero-content {
  max-width: 820px;
  margin: 0 auto;
}

.hero-badge-wrap {
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2.4rem, 5.5vw, 4.4rem);
  line-height: 1.12;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-desc {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 38px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

/* Mockup Widget - Live Audio Room */
.mockup-wrapper {
  max-width: 840px;
  margin: 0 auto;
  position: relative;
}

.mockup-wrapper::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90%;
  height: 80%;
  background: radial-gradient(circle, var(--secondary-glow) 0%, var(--primary-glow) 40%, transparent 70%);
  filter: blur(60px);
  z-index: -1;
}

.room-preview {
  background: #111116;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.7);
  text-align: left;
}

.room-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-glass);
}

.room-title-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.room-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 10px;
  background: rgba(0, 206, 201, 0.15);
  color: var(--primary);
  border-radius: var(--radius-full);
}

.room-speakers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 18px;
  margin-bottom: 24px;
}

.speaker-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.avatar-ring {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  padding: 3px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  position: relative;
  margin-bottom: 8px;
}

.avatar-ring.active-speaking {
  box-shadow: 0 0 20px var(--primary-glow);
  animation: voice-pulse 1.8s infinite ease-out;
}

@keyframes voice-pulse {
  0% { box-shadow: 0 0 0 0 rgba(0, 206, 201, 0.6); }
  70% { box-shadow: 0 0 0 14px rgba(0, 206, 201, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 206, 201, 0); }
}

.avatar-inner {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: #1c1c24;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #FFF;
  font-size: 1.1rem;
}

.speaker-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.speaker-role {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Sound Wave Bars */
.sound-bars {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: 26px;
  margin-top: 10px;
}

.sound-bar {
  width: 4px;
  border-radius: 4px;
  background: var(--primary);
  animation: wave 1.2s ease-in-out infinite;
}

.sound-bar:nth-child(2) { animation-delay: 0.2s; height: 18px; }
.sound-bar:nth-child(3) { animation-delay: 0.4s; height: 26px; background: #6C5CE7; }
.sound-bar:nth-child(4) { animation-delay: 0.1s; height: 14px; }
.sound-bar:nth-child(5) { animation-delay: 0.3s; height: 20px; background: var(--brand-gold); }

@keyframes wave {
  0%, 100% { transform: scaleY(0.4); }
  50% { transform: scaleY(1); }
}

/* Pillars Section */
.section {
  padding: 80px 0;
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 50px;
}

.section-title {
  font-size: clamp(1.9rem, 3.5vw, 2.7rem);
  margin-bottom: 14px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
}

.feature-card h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Play Store / Subdomain Legal Gateway */
.legal-gateway {
  background: linear-gradient(180deg, rgba(18, 18, 23, 0.6) 0%, rgba(10, 10, 14, 0.9) 100%);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 44px;
  margin: 40px 0;
}

.legal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 30px;
}

.legal-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-primary);
  transition: var(--transition-smooth);
}

.legal-card:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: var(--primary);
  transform: translateX(4px);
}

.legal-card-icon {
  font-size: 1.4rem;
  color: var(--primary);
}

.legal-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.legal-card-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.legal-card-url {
  font-size: 0.75rem;
  color: var(--primary);
  margin-top: 6px;
  word-break: break-all;
}

/* FAQ Accordion */
.faq-item {
  border-bottom: 1px solid var(--border-glass);
  padding: 20px 0;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.15rem;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.65;
}

.faq-item.active .faq-answer {
  max-height: 250px;
  padding-top: 14px;
}

.faq-item.active .faq-chevron {
  transform: rotate(180deg);
}

.faq-chevron {
  transition: transform 0.25s ease;
  color: var(--primary);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-glass);
  padding: 60px 0 30px;
  background: #040406;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-top: 12px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin-bottom: 18px;
}

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

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-smooth);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-glass);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 900px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 680px) {
  .nav-links {
    display: none;
  }
  .hero {
    padding: 60px 0 40px;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

/* Legal Documents Clean Styling (For privacy.html, terms.html, delete-account.html) */
.legal-doc-page {
  padding: 50px 0 100px;
}

.doc-wrapper {
  max-width: 860px;
  margin: 0 auto;
}

.doc-back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  margin-bottom: 24px;
  transition: var(--transition-smooth);
}

.doc-back-link:hover {
  transform: translateX(-4px);
}

.doc-card {
  background: var(--surface-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 44px;
  backdrop-filter: blur(20px);
}

.doc-header {
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 24px;
  margin-bottom: 30px;
}

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 12px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.doc-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.doc-body {
  font-size: 1rem;
  color: #D6D8DF;
  line-height: 1.75;
}

.doc-body h2 {
  font-size: 1.45rem;
  margin: 36px 0 14px;
  color: #FFF;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding-bottom: 8px;
}

.doc-body h3 {
  font-size: 1.15rem;
  margin: 22px 0 10px;
  color: var(--primary);
}

.doc-body p, .doc-body ul, .doc-body ol {
  margin-bottom: 18px;
}

.doc-body ul, .doc-body ol {
  padding-left: 24px;
}

.doc-body li {
  margin-bottom: 8px;
}

.doc-callout {
  padding: 18px 22px;
  border-radius: var(--radius-md);
  background: rgba(0, 206, 201, 0.08);
  border-left: 4px solid var(--primary);
  margin: 24px 0;
  color: var(--text-primary);
}

.doc-callout.warning {
  background: rgba(255, 71, 87, 0.08);
  border-left-color: var(--error);
}

.doc-callout.gold {
  background: rgba(245, 193, 92, 0.08);
  border-left-color: var(--brand-gold);
}