/* ============================================================
   PalStream Marketing Website — Ethereal Stream Design System
   Colors, gradients, and glass effects from SFColors.swift
   Background inspired by TVBackgroundLayer.swift
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ── Design Tokens ── */
:root {
  --sf-bg: #111318;
  --sf-surface-lowest: #0C0E12;
  --sf-surface-low: #1A1C20;
  --sf-surface: #1E2024;
  --sf-surface-high: #282A2E;
  --sf-surface-highest: #333539;
  --sf-surface-bright: #37393E;
  --sf-primary: #7C4DFF;
  --sf-primary-light: #CDBDFF;
  --sf-secondary: #00E5FF;
  --sf-secondary-light: #BDF4FF;
  --sf-tertiary: #FFB688;
  --sf-on-surface: #E2E2E8;
  --sf-on-surface-variant: #CAC3D8;
  --sf-outline: #948EA1;
  --sf-outline-variant: #494455;
  --sf-gradient-top: #25263D;
  --sf-gradient-bottom: #1A1B2E;
  --sf-error: #FFB4AB;
  --sf-glass-overlay: rgba(46, 47, 77, 0.7);
  --sf-glass-border: rgba(255, 255, 255, 0.15);
  --sf-focus-glow: rgba(124, 77, 255, 0.4);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition-quick: 0.15s ease;
  --transition-standard: 0.3s ease;
  --transition-focus: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--sf-on-surface);
  background: var(--sf-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── TVBackgroundLayer — Full-page gradient + radial glow ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background: linear-gradient(to bottom, #0A0B10, #111318, #15161E);
}

body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 140%;
  height: 100%;
  z-index: -1;
  background: radial-gradient(ellipse at top center, rgba(124, 77, 255, 0.14), transparent 65%);
  pointer-events: none;
}

a {
  color: var(--sf-primary-light);
  text-decoration: none;
  transition: color var(--transition-quick);
}
a:hover {
  color: var(--sf-secondary);
}

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

/* ── Utility ── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--sf-primary), var(--sf-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.accent-line {
  width: 60px;
  height: 3px;
  background: linear-gradient(to right, var(--sf-primary), var(--sf-secondary));
  border-radius: 2px;
}

/* ── Glass Card ── */
.glass-card {
  background: var(--sf-glass-overlay);
  border: 1px solid var(--sf-glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 24px;
  transition: background var(--transition-standard), box-shadow var(--transition-standard);
}

.nav.scrolled {
  background: rgba(12, 14, 18, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--sf-outline-variant);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.nav-brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.nav-brand span {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--sf-on-surface);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--sf-on-surface-variant);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-quick);
}
.nav-links a:hover {
  color: var(--sf-on-surface);
}

.nav-cta {
  padding: 8px 20px;
  background: var(--sf-primary);
  color: #fff !important;
  border-radius: 100px;
  font-weight: 600;
  font-size: 0.85rem;
  transition: background var(--transition-quick), transform var(--transition-quick);
}
.nav-cta:hover {
  background: #6833EA;
  transform: translateY(-1px);
  color: #fff !important;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--sf-on-surface);
  cursor: pointer;
  padding: 8px;
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
}

/* ── Hero Section ── */
.hero {
  padding: 160px 24px 100px;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(124, 77, 255, 0.15);
  border: 1px solid rgba(124, 77, 255, 0.3);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--sf-primary-light);
  margin-bottom: 28px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  background: var(--sf-secondary);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--sf-on-surface-variant);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.6;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 20px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: var(--sf-primary);
  color: #fff;
  border-radius: 100px;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition-focus);
  text-decoration: none;
}
.btn-primary:hover {
  background: #6833EA;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(124, 77, 255, 0.35);
  color: #fff;
}
.btn-primary svg {
  width: 20px;
  height: 20px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: transparent;
  color: var(--sf-on-surface);
  border: 1px solid var(--sf-outline-variant);
  border-radius: 100px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-focus);
  text-decoration: none;
}
.btn-secondary:hover {
  border-color: var(--sf-primary);
  color: var(--sf-primary-light);
  transform: translateY(-2px);
}

.hero-platforms {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 16px;
  color: var(--sf-outline);
  font-size: 0.8rem;
  font-weight: 500;
}

.hero-platforms span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-platforms svg {
  width: 16px;
  height: 16px;
  opacity: 0.7;
}

/* ── Device Showcase ── */
.showcase {
  padding: 0 24px 120px;
  position: relative;
}

.showcase-inner {
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

.device-tabs {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin-bottom: 48px;
  padding: 4px;
  background: var(--sf-surface-low);
  border-radius: 100px;
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}

.device-tab {
  padding: 10px 24px;
  border-radius: 100px;
  border: none;
  background: transparent;
  color: var(--sf-on-surface-variant);
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-focus);
}

.device-tab.active {
  background: var(--sf-primary);
  color: #fff;
}

.device-tab:hover:not(.active) {
  color: var(--sf-on-surface);
  background: var(--sf-surface);
}

.device-gallery {
  display: none;
  justify-content: center;
  gap: 24px;
  align-items: flex-start;
}

.device-gallery.active {
  display: flex;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Phone frame */
.phone-frame {
  width: 260px;
  flex-shrink: 0;
  border-radius: 36px;
  padding: 12px;
  background: linear-gradient(145deg, #2A2A3A, #1A1A28);
  box-shadow:
    0 25px 80px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.phone-frame img {
  border-radius: 26px;
  width: 100%;
}

/* Tablet frame */
.tablet-frame {
  width: 580px;
  flex-shrink: 0;
  border-radius: 24px;
  padding: 14px;
  background: linear-gradient(145deg, #2A2A3A, #1A1A28);
  box-shadow:
    0 25px 80px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.tablet-frame img {
  border-radius: 14px;
  width: 100%;
}

/* Desktop frame */
.desktop-frame {
  width: 800px;
  max-width: 100%;
  flex-shrink: 0;
  border-radius: 16px;
  padding: 10px;
  background: linear-gradient(145deg, #2A2A3A, #1A1A28);
  box-shadow:
    0 25px 80px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.desktop-frame img {
  border-radius: 8px;
  width: 100%;
}

/* TV frame */
.tv-frame {
  width: 900px;
  max-width: 100%;
  flex-shrink: 0;
  border-radius: 12px;
  padding: 8px;
  background: linear-gradient(145deg, #2A2A3A, #1A1A28);
  box-shadow:
    0 30px 100px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.tv-frame img {
  border-radius: 6px;
  width: 100%;
}

/* ── Features Section ── */
.features {
  padding: 120px 24px;
  position: relative;
}

.features::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--sf-outline-variant), transparent);
}

.section-header {
  text-align: center;
  margin-bottom: 72px;
}

.section-header .accent-line {
  margin: 0 auto 20px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-header p {
  color: var(--sf-on-surface-variant);
  max-width: 560px;
  margin: 0 auto;
  font-size: 1.05rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.feature-card {
  padding: 36px 28px;
  border-radius: var(--radius-lg);
  background: rgba(30, 32, 36, 0.6);
  border: 1px solid var(--sf-outline-variant);
  transition: all var(--transition-standard);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--sf-primary), var(--sf-secondary));
  opacity: 0;
  transition: opacity var(--transition-standard);
}

.feature-card:hover {
  border-color: rgba(124, 77, 255, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  background: rgba(124, 77, 255, 0.12);
  color: var(--sf-primary);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-icon.cyan {
  background: rgba(0, 229, 255, 0.12);
  color: var(--sf-secondary);
}

.feature-icon.amber {
  background: rgba(255, 182, 136, 0.12);
  color: var(--sf-tertiary);
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.feature-card p {
  color: var(--sf-on-surface-variant);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ── Platforms Section ── */
.platforms {
  padding: 120px 24px;
  position: relative;
}

.platforms::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--sf-outline-variant), transparent);
}

.platforms-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1000px;
  margin: 0 auto;
}

.platform-card {
  text-align: center;
  padding: 40px 20px;
  border-radius: var(--radius-lg);
  background: rgba(30, 32, 36, 0.4);
  border: 1px solid var(--sf-outline-variant);
  transition: all var(--transition-standard);
}

.platform-card:hover {
  border-color: rgba(124, 77, 255, 0.3);
  transform: translateY(-4px);
  background: rgba(30, 32, 36, 0.7);
}

.platform-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sf-on-surface);
}

.platform-icon svg {
  width: 40px;
  height: 40px;
}

.platform-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.platform-card p {
  color: var(--sf-on-surface-variant);
  font-size: 0.8rem;
}

/* ── CTA Section ── */
.cta-section {
  padding: 120px 24px;
  text-align: center;
  position: relative;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124, 77, 255, 0.1), transparent 70%);
  pointer-events: none;
}

.cta-section h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.cta-section p {
  color: var(--sf-on-surface-variant);
  font-size: 1.1rem;
  margin-bottom: 36px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ── Footer ── */
.footer {
  padding: 64px 24px 32px;
  border-top: 1px solid var(--sf-outline-variant);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.footer-brand span {
  font-size: 1.1rem;
  font-weight: 700;
}

.footer-desc {
  color: var(--sf-on-surface-variant);
  font-size: 0.85rem;
  line-height: 1.6;
  max-width: 320px;
}

.footer h4 {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--sf-outline);
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--sf-on-surface-variant);
  font-size: 0.9rem;
  transition: color var(--transition-quick);
}
.footer-links a:hover {
  color: var(--sf-on-surface);
}

.footer-bottom {
  max-width: 1200px;
  margin: 48px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(73, 68, 85, 0.4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--sf-outline);
  font-size: 0.8rem;
}

.footer-bottom a {
  color: var(--sf-outline);
}
.footer-bottom a:hover {
  color: var(--sf-on-surface-variant);
}

/* ── Legal Pages ── */
.legal-page {
  padding: 140px 24px 80px;
}

.legal-content {
  max-width: 800px;
  margin: 0 auto;
}

.legal-content h1 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.legal-meta {
  color: var(--sf-outline);
  font-size: 0.85rem;
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--sf-outline-variant);
}

.legal-content h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-top: 48px;
  margin-bottom: 16px;
  color: var(--sf-on-surface);
}

.legal-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--sf-on-surface);
}

.legal-content p {
  color: var(--sf-on-surface-variant);
  margin-bottom: 16px;
  line-height: 1.7;
  font-size: 0.95rem;
}

.legal-content ul, .legal-content ol {
  color: var(--sf-on-surface-variant);
  margin-bottom: 16px;
  padding-left: 24px;
  line-height: 1.7;
  font-size: 0.95rem;
}

.legal-content li {
  margin-bottom: 8px;
}

.legal-content strong {
  color: var(--sf-on-surface);
}

.legal-content a {
  color: var(--sf-primary-light);
}

/* ── FAQ Page ── */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--sf-outline-variant);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-standard);
}

.faq-item:hover {
  border-color: rgba(124, 77, 255, 0.3);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: rgba(30, 32, 36, 0.4);
  border: none;
  color: var(--sf-on-surface);
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: background var(--transition-quick);
}

.faq-question:hover {
  background: rgba(30, 32, 36, 0.7);
}

.faq-question svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--sf-outline);
  transition: transform var(--transition-standard);
}

.faq-item.open .faq-question svg {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 24px 20px;
}

.faq-answer p {
  color: var(--sf-on-surface-variant);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ── Scroll Animations ── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ── Responsive ── */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .tv-frame, .desktop-frame {
    width: 100%;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(12, 14, 18, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--sf-outline-variant);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    padding: 130px 24px 60px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-platforms {
    flex-wrap: wrap;
    gap: 16px;
  }

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

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

  .phone-frame {
    width: 220px;
  }

  .tablet-frame {
    width: 100%;
  }

  .device-gallery {
    flex-wrap: wrap;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .device-tabs {
    flex-wrap: wrap;
    border-radius: var(--radius-md);
  }

  .device-tab {
    padding: 8px 16px;
    font-size: 0.8rem;
  }

  .legal-content h1 {
    font-size: 1.8rem;
  }
}

@media (max-width: 480px) {
  .phone-frame {
    width: 200px;
  }

  .hero h1 {
    font-size: 2rem;
  }
}