/* ═══════════════════════════════════════
   Roomie Landing Page — Design System
   ═══════════════════════════════════════ */

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

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

:root {
  --bg-primary: #08080c;
  --bg-secondary: #0d0d14;
  --bg-card: rgba(255,255,255,0.04);
  --bg-card-hover: rgba(255,255,255,0.08);
  --border-subtle: rgba(255,255,255,0.07);
  --border-glow: rgba(255,255,255,0.12);
  --text-primary: #f0f0f5;
  --text-secondary: rgba(240,240,245,0.6);
  --text-muted: rgba(240,240,245,0.4);
  --accent-purple: #a855f7;
  --accent-blue: #3b82f6;
  --accent-cyan: #06b6d4;
  --accent-green: #22c55e;
  --gradient-hero: linear-gradient(135deg, #a855f7 0%, #6366f1 50%, #3b82f6 100%);
  --gradient-cta: linear-gradient(135deg, #a855f7, #7c3aed);
  --glass: rgba(255,255,255,0.03);
  --glass-border: rgba(255,255,255,0.06);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-glow: 0 0 80px rgba(168,85,247,0.15);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-w: 1140px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: var(--font); cursor: pointer; border: none; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* ── Navbar ── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 16px 0;
  background: rgba(8,8,12,0.7);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background 0.3s;
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; }
.nav-brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; letter-spacing: -0.3px; }
.nav-brand svg { width: 32px; height: 32px; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { font-size: 14px; font-weight: 500; color: var(--text-secondary); transition: color 0.2s; }
.nav-links a:hover { color: var(--text-primary); }
.nav-cta {
  padding: 10px 22px; border-radius: 10px; font-size: 14px; font-weight: 600;
  background: var(--gradient-cta); color: #fff;
  transition: transform 0.2s, box-shadow 0.2s;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(168,85,247,0.35); }

/* ── Hero ── */
.hero {
  position: relative; padding: 160px 0 80px; text-align: center; overflow: hidden;
}
.hero-glow {
  position: absolute; top: -120px; left: 50%; transform: translateX(-50%);
  width: 700px; height: 700px; border-radius: 50%;
  background: radial-gradient(circle, rgba(168,85,247,0.12) 0%, rgba(99,102,241,0.06) 40%, transparent 70%);
  pointer-events: none; animation: pulse-glow 6s ease-in-out infinite;
}
@keyframes pulse-glow { 0%,100%{ opacity:.7; transform:translateX(-50%) scale(1); } 50%{ opacity:1; transform:translateX(-50%) scale(1.08); } }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px 6px 8px; border-radius: 40px;
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  font-size: 13px; font-weight: 500; color: var(--text-secondary); margin-bottom: 28px;
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-green); animation: blink 2s infinite; }
@keyframes blink { 0%,100%{ opacity:1; } 50%{ opacity:.4; } }

.hero h1 { font-size: clamp(42px, 6vw, 72px); font-weight: 900; letter-spacing: -2px; line-height: 1.05; margin-bottom: 20px; }
.hero h1 .gradient-text {
  background: var(--gradient-hero); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero .subtitle { font-size: clamp(16px, 2vw, 20px); color: var(--text-secondary); max-width: 560px; margin: 0 auto 40px; line-height: 1.7; }

.hero-actions { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; margin-bottom: 16px; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 16px 32px; border-radius: 14px; font-size: 16px; font-weight: 700;
  background: var(--gradient-cta); color: #fff;
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(168,85,247,0.4); }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 16px 32px; border-radius: 14px; font-size: 16px; font-weight: 600;
  background: var(--bg-card); border: 1px solid var(--border-subtle); color: var(--text-primary);
  transition: background 0.2s, border-color 0.2s;
}
.btn-secondary:hover { background: var(--bg-card-hover); border-color: var(--border-glow); }
.hero-note { font-size: 13px; color: var(--text-muted); margin-top: 8px; }

/* Hero screenshot */
.hero-screenshot {
  position: relative; max-width: 820px; margin: 60px auto 0;
  border-radius: var(--radius-xl); overflow: hidden;
  box-shadow: var(--shadow-glow), 0 32px 64px rgba(0,0,0,0.5);
  border: 1px solid var(--border-subtle);
}
.hero-screenshot img { width: 100%; border-radius: var(--radius-xl); }
.hero-screenshot::after {
  content: ''; position: absolute; inset: 0;
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, transparent 60%, var(--bg-primary) 100%);
  pointer-events: none;
}

/* ── Section shared ── */
.section { padding: 100px 0; position: relative; }
.section-label {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 40px;
  background: rgba(168,85,247,0.1); border: 1px solid rgba(168,85,247,0.2);
  font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--accent-purple); margin-bottom: 16px;
}
.section-title { font-size: clamp(30px, 4vw, 44px); font-weight: 800; letter-spacing: -1.2px; line-height: 1.15; margin-bottom: 14px; }
.section-desc { font-size: 17px; color: var(--text-secondary); max-width: 540px; line-height: 1.7; }

/* ── Features Grid ── */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 56px; }
.feature-card {
  padding: 32px; border-radius: var(--radius-lg);
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.feature-card:hover { transform: translateY(-4px); border-color: var(--border-glow); box-shadow: 0 12px 40px rgba(0,0,0,0.3); }
.feature-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 20px;
}
.feature-icon.purple { background: rgba(168,85,247,0.15); color: var(--accent-purple); }
.feature-icon.blue { background: rgba(59,130,246,0.15); color: var(--accent-blue); }
.feature-icon.cyan { background: rgba(6,182,212,0.15); color: var(--accent-cyan); }
.feature-icon.green { background: rgba(34,197,94,0.15); color: var(--accent-green); }
.feature-icon.orange { background: rgba(249,115,22,0.15); color: #f97316; }
.feature-icon.pink { background: rgba(236,72,153,0.15); color: #ec4899; }
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.65; }

/* ── Modes showcase ── */
.modes { background: var(--bg-secondary); }
.modes-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 56px; }
.mode-card {
  position: relative; border-radius: var(--radius-xl); overflow: hidden;
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  transition: transform 0.3s, box-shadow 0.3s;
}
.mode-card:hover { transform: translateY(-4px); box-shadow: 0 16px 48px rgba(0,0,0,0.4); }
.mode-card-img { width: 100%; aspect-ratio: 1/1; object-fit: cover; }
.mode-card-content { padding: 28px 32px 32px; }
.mode-tag {
  display: inline-block; padding: 4px 12px; border-radius: 20px;
  font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 1px;
  margin-bottom: 12px;
}
.mode-tag.blue { background: rgba(59,130,246,0.15); color: var(--accent-blue); }
.mode-tag.purple { background: rgba(168,85,247,0.15); color: var(--accent-purple); }
.mode-card h3 { font-size: 22px; font-weight: 800; margin-bottom: 8px; }
.mode-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ── Categories ── */
.categories-wrap { margin-top: 56px; }
.cat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.cat-item {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 18px; border-radius: var(--radius-md);
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  transition: background 0.2s, border-color 0.2s;
}
.cat-item:hover { background: var(--bg-card-hover); border-color: var(--border-glow); }
.cat-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.cat-item span { font-size: 14px; font-weight: 500; }

/* ── Safety ── */
.safety { background: var(--bg-secondary); }
.safety-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 56px; }
.safety-card {
  padding: 32px; border-radius: var(--radius-lg);
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  text-align: center;
}
.safety-card .icon-wrap {
  width: 56px; height: 56px; border-radius: 16px; margin: 0 auto 20px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(34,197,94,0.1); font-size: 26px;
}
.safety-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.safety-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.65; }

/* ── Requirements ── */
.req-list { display: flex; gap: 16px; margin-top: 40px; flex-wrap: wrap; }
.req-item {
  flex: 1; min-width: 200px; padding: 24px; border-radius: var(--radius-lg);
  background: var(--bg-card); border: 1px solid var(--border-subtle); text-align: center;
}
.req-item .icon-wrap {
  width: 48px; height: 48px; border-radius: 12px; margin: 0 auto 14px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(168,85,247,0.1); font-size: 22px;
}
.req-item h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.req-item p { font-size: 13px; color: var(--text-muted); }

/* ── CTA ── */
.cta {
  text-align: center; padding: 120px 0;
  background: radial-gradient(ellipse at center, rgba(168,85,247,0.08) 0%, transparent 70%);
}
.cta h2 { font-size: clamp(32px, 4.5vw, 50px); font-weight: 900; letter-spacing: -1.5px; margin-bottom: 16px; }
.cta p { font-size: 18px; color: var(--text-secondary); margin-bottom: 36px; }

/* ── Footer ── */
.footer {
  padding: 40px 0; border-top: 1px solid var(--border-subtle);
  text-align: center; font-size: 13px; color: var(--text-muted);
}
.footer-brand { display: flex; align-items: center; justify-content: center; gap: 8px; margin-bottom: 12px; font-size: 16px; font-weight: 700; color: var(--text-secondary); }
.footer-brand svg { width: 24px; height: 24px; }

/* ── Animations ── */
.fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ── Responsive ── */
@media (max-width: 900px) {
  .features-grid, .safety-grid { grid-template-columns: repeat(2, 1fr); }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .modes-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .features-grid, .safety-grid { grid-template-columns: 1fr; }
  .cat-grid { grid-template-columns: 1fr; }
  .nav-links a:not(.nav-cta) { display: none; }
  .hero { padding: 130px 0 60px; }
  .section { padding: 70px 0; }
  .hero-actions { flex-direction: column; }
  .req-list { flex-direction: column; }
}