/* ─── Spatial Audio Studio — Landing Page ───────────────────────────────────────
 * Style guide: matches /app/css/style.css exactly
 * Dark, minimal, professional — no gradients, no AI aesthetics
 * ──────────────────────────────────────────────────────────────────────────── */

@import 'variables.css';

:focus-visible {
  outline: 2px solid var(--accent, #00ff88);
  outline-offset: 2px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--accent-green); text-decoration: none; transition: opacity 0.15s; }
a:hover { opacity: 0.75; }
button { font-family: inherit; cursor: pointer; }

/* ─── Navigation ───────────────────────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,10,18,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  height: 60px;
  display: flex; align-items: center;
}
.nav-inner {
  max-width: 1100px; margin: 0 auto; padding: 0 24px;
  width: 100%; display: flex; align-items: center; gap: 20px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 15px; font-weight: 600; color: var(--text-primary);
}
.nav-logo-icon {
  width: 28px; height: 28px;
  background-image: url('/logo.svg');
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  flex-shrink: 0;
}
.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-link {
  padding: 7px 14px; border-radius: 8px;
  font-size: 14px; color: var(--text-secondary);
  transition: color 0.15s, background 0.15s;
}
.nav-link:hover { color: var(--text-primary); background: var(--bg-tertiary); }
.nav-cta {
  padding: 8px 18px; border-radius: 8px;
  font-size: 13px; font-weight: 600;
  background: var(--accent-green); color: var(--bg-primary);
  transition: opacity 0.15s;
}
.nav-cta:hover { opacity: 0.85; }

/* ─── Hero ─────────────────────────────────────────────────────────────────── */
.hero {
  min-height: calc(100vh - 60px);
  display: flex; align-items: center; justify-content: center;
  padding: 80px 24px;
  position: relative; overflow: hidden;
}
/* Subtle grid background */
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--border-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.4;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}
.hero-inner {
  position: relative; z-index: 1;
  max-width: 700px; width: 100%;
  text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 24px;
}
.hero-title {
  font-size: clamp(28px, 4.5vw, 52px);
  font-weight: 700; letter-spacing: -1px; line-height: 1.1;
  color: var(--text-primary);
}
.hero-title-main {
  font-style: normal;
  color: var(--accent-green);
  display: block;
}
.hero-subtitle {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 420px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.hero-btn-primary {
  padding: 13px 30px; border-radius: 10px;
  background: var(--accent-green); color: var(--bg-primary);
  font-size: 15px; font-weight: 600; text-decoration: none;
  transition: opacity 0.15s, transform 0.15s;
}
.hero-btn-primary:hover { opacity: 0.88; transform: translateY(-1px); }
.hero-btn-ghost {
  padding: 13px 30px; border-radius: 10px;
  background: transparent; color: var(--text-secondary);
  font-size: 15px; font-weight: 500; text-decoration: none;
  border: 1px solid var(--border-color);
  transition: border-color 0.15s, background 0.15s;
}
.hero-btn-ghost:hover { border-color: var(--border-active); background: var(--bg-tertiary); }

/* App preview — clean product mockup card */
.hero-preview {
  margin-bottom: 8px;
  display: flex; justify-content: center;
}
.preview-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 20px 28px 18px;
  width: 260px;
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.5), 0 0 0 1px rgba(0,255,136,0.04);
}
.preview-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--text-dim); }
.preview-dot--active { background: var(--accent-green); box-shadow: 0 0 8px rgba(0,255,136,0.5); }
.preview-bar { width: 100%; height: 4px; background: var(--bg-tertiary); border-radius: 2px; overflow: hidden; }
.preview-bar-fill { height: 100%; background: var(--accent-green); border-radius: 2px; width: 62%; }
.preview-path-ring {
  width: 100px; height: 100px;
  border: 1.5px solid rgba(0,255,136,0.2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.preview-path-ring-inner {
  width: 48px; height: 48px;
  border: 1.5px solid rgba(0,255,136,0.35);
  border-radius: 50%;
}
.preview-label {
  font-size: 9px; font-weight: 600; letter-spacing: 0.12em; color: var(--text-dim);
}

/* ─── Sections ──────────────────────────────────────────────────────────────── */
.section { padding: 90px 24px; }
.section-inner { max-width: 1060px; margin: 0 auto; }
.section-label {
  font-size: 11px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent-green); margin-bottom: 12px;
}
.section-title {
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 700; letter-spacing: -0.3px;
  color: var(--text-primary); margin-bottom: 52px;
}

/* ─── Features ─────────────────────────────────────────────────────────────── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.feature-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s;
}
.feature-card:hover { border-color: var(--border-active); }
.feature-icon-wrap {
  width: 36px; height: 36px; border-radius: 8px;
  background: rgba(0,255,136,0.1);
  border: 1px solid rgba(0,255,136,0.2);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.feature-icon-line {
  width: 16px; height: 2px;
  background: var(--accent-green); border-radius: 2px;
}
.feature-icon-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-green);
}
.feature-card h3 {
  font-size: 15px; font-weight: 600; color: var(--text-primary); margin-bottom: 8px;
}
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.65; }

/* Feature mini grid — homepage */
.feature-mini-grid {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 8px;
}
.feature-mini {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  transition: border-color 0.15s;
}
.feature-mini:hover { border-color: rgba(0,255,136,0.4); }
.feature-mini-icon { font-size: 13px; color: var(--accent-green); }
.feature-mini-name { font-size: 13px; color: var(--text-secondary); white-space: nowrap; }

/* ─── How It Works ─────────────────────────────────────────────────────────── */
.how-section { background: var(--bg-secondary); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }
.steps {
  display: flex; gap: 0;
}
.step {
  flex: 1; display: flex; flex-direction: column; align-items: center;
  text-align: center; padding: 0 24px; position: relative;
}
.step-num {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-active);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 700; color: var(--accent-green);
  margin-bottom: 18px; flex-shrink: 0;
}
.step h3 { font-size: 15px; font-weight: 600; color: var(--text-primary); margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--text-secondary); line-height: 1.65; }
.step-connector {
  position: absolute; top: 22px; right: -1px;
  width: 48px; height: 1px;
  background: var(--border-color);
}

/* ─── CTA ─────────────────────────────────────────────────────────────────── */
.cta-section { padding: 80px 24px; text-align: center; }
.cta-card {
  max-width: 560px; margin: 0 auto;
  padding: 56px 48px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
}
.cta-card h2 { font-size: 28px; font-weight: 700; color: var(--text-primary); margin-bottom: 12px; }
.cta-card p { font-size: 15px; color: var(--text-secondary); margin-bottom: 28px; }

/* ─── User dropdown menu ─────────────────────────────────────────────────── */
.nav-user-menu {
  position: relative;
}
.nav-user-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
  transition: background 0.15s, border-color 0.15s;
}
.nav-user-btn:hover {
  background: var(--bg-secondary);
  border-color: var(--accent-color, #00ff88);
}
.nav-user-avatar {
  font-size: 14px;
  opacity: 0.7;
}
.nav-user-name {
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.nav-user-arrow {
  font-size: 10px;
  opacity: 0.5;
  transition: transform 0.2s;
}
.nav-user-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  min-width: 160px;
  padding: 6px;
  display: none;
  flex-direction: column;
  gap: 2px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  z-index: 100;
}
.nav-user-dropdown.open {
  display: flex;
}
.dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  text-decoration: none;
  border: none;
  background: none;
  font-family: inherit;
  width: 100%;
  text-align: left;
  transition: background 0.15s, color 0.15s;
}
.dropdown-item:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}
.nav-user-hidden {
  display: none;
}

/* ─── Footer ──────────────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 40px 24px 32px;
}
.footer-inner { max-width: 1060px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.footer-brand .logo-text { font-size: 13px; color: var(--text-secondary); }
.footer-tagline { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { font-size: 13px; color: var(--text-secondary); transition: color 0.15s; }
.footer-links a:hover { color: var(--text-primary); }
.footer-copy { font-size: 12px; color: var(--text-secondary); width: 100%; text-align: center; margin-top: 24px; }

/* ─── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .steps { flex-direction: column; gap: 32px; }
  .step-connector { display: none; }
  .cta-card { padding: 36px 24px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 560px) {
  .hero-visual { display: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .nav-links .nav-link { display: none; }
}