/* www/public/style.css - Ear Immersion Player Styles */
:root {
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 9999px;
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

:root[data-theme="dark"] {
  --bg: #09090b;
  --bg-subtle: #121214;
  --surface: #141417;
  --surface-raised: #1c1c20;
  --surface-hover: #232328;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #f4f4f5;
  --text-muted: #a1a1aa;
  --text-dim: #71717a;
  --accent: #2f7cf6;
  --accent-hover: #3b82f6;
  --accent-soft: rgba(47, 124, 246, 0.12);
  --accent-glow: rgba(47, 124, 246, 0.25);
  --success: #22c55e;
  --success-soft: rgba(34, 197, 94, 0.12);
  --warning: #f59e0b;
  --warning-soft: rgba(245, 158, 11, 0.12);
  --danger: #ef4444;
  --danger-soft: rgba(239, 68, 68, 0.12);
  --header-bg: rgba(9, 9, 11, 0.8);
  --window-shadow: 0 24px 60px -12px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(255, 255, 255, 0.08);
  --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --mask-dot-color: #52525b;
}

:root[data-theme="light"] {
  --bg: #ffffff;
  --bg-subtle: #f8fafc;
  --surface: #ffffff;
  --surface-raised: #f1f5f9;
  --surface-hover: #e2e8f0;
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.16);
  --text: #09090b;
  --text-muted: #52525b;
  --text-dim: #94a3b8;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.08);
  --accent-glow: rgba(37, 99, 235, 0.18);
  --success: #16a34a;
  --success-soft: rgba(22, 163, 74, 0.1);
  --warning: #d97706;
  --warning-soft: rgba(217, 119, 6, 0.1);
  --danger: #dc2626;
  --danger-soft: rgba(220, 38, 38, 0.1);
  --header-bg: rgba(255, 255, 255, 0.85);
  --window-shadow: 0 20px 50px -12px rgba(15, 23, 42, 0.12), 0 0 0 1px rgba(0, 0, 0, 0.08);
  --card-shadow: 0 8px 24px -8px rgba(15, 23, 42, 0.08);
  --mask-dot-color: #cbd5e1;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
input { font-family: inherit; }

/* ── Glow Mesh Background ── */
.bg-glow {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 480px;
  background: radial-gradient(ellipse at 50% 0%, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

/* ── Header ── */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--accent-soft);
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.2;
}

.brand-sub {
  font-size: 10px;
  color: var(--text-dim);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  margin-left: 36px;
  margin-right: auto;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  border: 1px solid var(--border);
  transition: all var(--transition);
  font-size: 12px;
}

.btn-icon:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: var(--surface-raised);
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: #ffffff;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition);
}

.btn-cta:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

/* ── Container ── */
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ── Hero ── */
.hero {
  padding: 36px 0 16px;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: var(--accent-soft);
  border: 1px solid var(--border-strong);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 14px;
}

.hero-title {
  font-size: clamp(30px, 4.2vw, 48px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 12px;
}

.hero-title span {
  background: linear-gradient(135deg, var(--text) 30%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  max-width: 620px;
  margin: 0 auto 18px;
  font-size: clamp(14px, 1.8vw, 16px);
  color: var(--text-muted);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.btn-primary-hero {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--text);
  color: var(--bg);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  transition: all var(--transition);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

.btn-primary-hero:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
  opacity: 0.95;
}

.btn-secondary-hero {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background: var(--surface);
  transition: all var(--transition);
}

.btn-secondary-hero:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

/* App mockup & video practice player styles: www/public/player.css */
@import "./player.css";

/* ── Section Header ── */
.section {
  padding: 60px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-tag {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(24px, 3.5vw, 36px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* ── Download Platform Cards ── */
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 960px;
  margin: 0 auto 28px;
}

.download-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition);
  box-shadow: var(--card-shadow);
}

.download-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

#hero-dl-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 0;
}

.download-card-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  color: var(--text);
  margin-bottom: 14px;
}

.download-card-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.download-card-desc {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.5;
  margin-bottom: 20px;
}

.download-card-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.download-card-btn:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ── AI Install Prompt Box ── */
.ai-box {
  max-width: 960px;
  margin: 0 auto;
  background: var(--bg-subtle);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: var(--card-shadow);
  transition: all var(--transition);
}

.ai-box:hover {
  border-color: var(--accent);
}

.ai-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.ai-box-title {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.ai-box-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  background: var(--accent-soft);
  color: var(--accent);
}

.ai-box-hint {
  font-size: 13px;
  color: var(--text-muted);
}

.ai-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: var(--surface-raised);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
}

.ai-copy-btn:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.ai-copy-btn.copied {
  background: var(--success-soft);
  color: var(--success);
  border-color: var(--success);
}

.ai-prompt-content {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  color: var(--text);
  user-select: all;
  cursor: pointer;
  white-space: pre-wrap;
  word-break: break-all;
  transition: border-color var(--transition);
}

.ai-prompt-content:hover {
  border-color: var(--border-strong);
}

/* ── FAQ Accordion ── */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item:hover {
  border-color: var(--border-strong);
}

.faq-question {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-icon {
  font-size: 14px;
  color: var(--text-dim);
  transition: transform var(--transition);
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-dim);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 8px;
}

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

/* ── Keyframe Animations ── */
@keyframes slide-up {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .app-sidebar {
    display: none;
  }
  .download-grid {
    grid-template-columns: 1fr;
  }
  .window-titlebar {
    padding: 0 12px;
  }
  .step-btn {
    padding: 4px 8px;
    font-size: 11px;
  }
  .hero {
    padding: 48px 0 24px;
  }
  .import-card {
    flex-direction: column;
    align-items: flex-start;
  }
  .import-thumb {
    width: 100%;
    height: 140px;
  }
  .ai-box-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .ai-copy-btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }
}