/*
  Habit Vibes — minimal glassmorphism landing page
  Uses system UI fonts, no network calls, prefers-reduced-motion aware.
*/

/* Reset and base */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.6;
  color: var(--fg);
  background: radial-gradient(1200px 800px at 80% -20%, #7c3aed18, transparent 60%),
              radial-gradient(1000px 700px at -20% 100%, #06b6d418, transparent 60%),
              var(--bg);
  background-attachment: fixed;
}

:root {
  color-scheme: light dark;
  --bg: #0b1220;         /* slate-950-ish */
  --fg: #e6e7eb;         /* near-white */
  --muted: #aab0bb;
  --card:  rgba(255,255,255,0.06);
  --stroke: rgba(255,255,255,0.18);
  --glow:  0 10px 30px rgba(124,58,237,0.25), 0 2px 8px rgba(14,165,233,0.18);
  --brand: #7c3aed;      /* violet-600 */
  --brand-2: #06b6d4;    /* cyan-500 */
  --brand-3: #10b981;    /* emerald-500 */
  --btn: rgba(255,255,255,0.08);
  --btn-stroke: rgba(255,255,255,0.25);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fb;
    --fg: #0b1220;
    --muted: #4b5563;
    --card: rgba(255,255,255,0.65);
    --stroke: rgba(15,23,42,0.08);
    --btn: rgba(15,23,42,0.06);
    --btn-stroke: rgba(15,23,42,0.12);
  }
}

.container {
  position: relative;
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 20px 24px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100svh;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  user-select: none;
}
.brand-name {
  font-weight: 600;
  letter-spacing: 0.2px;
}

.hero {
  margin: min(10vh, 96px) auto 0;
  padding: clamp(20px, 4vw, 36px);
  border-radius: 24px;
  text-align: center;
}

.glass {
  backdrop-filter: saturate(160%) blur(18px);
  -webkit-backdrop-filter: saturate(160%) blur(18px);
  background: linear-gradient(180deg, var(--card), rgba(255,255,255,0.02));
  border: 1px solid var(--stroke);
  box-shadow: var(--glow);
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4.4vw, 48px);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.lead {
  margin: 0 auto;
  max-width: 56ch;
  color: var(--muted);
}

.cta {
  margin-top: 22px;
}

.btn {
  appearance: none;
  border: 1px solid var(--btn-stroke);
  background: linear-gradient(180deg, var(--btn), transparent);
  color: var(--fg);
  padding: 12px 18px;
  border-radius: 14px;
  font-weight: 600;
  letter-spacing: 0.2px;
  cursor: not-allowed;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.btn:disabled {
  opacity: 0.9;
}

.note {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer {
  margin-top: 48px;
  color: var(--muted);
  text-align: center;
}

/* Background orbs */
.bg { position: fixed; inset: 0; overflow: hidden; z-index: -1; }
.bg-blob {
  position: absolute;
  filter: blur(40px);
  opacity: 0.55;
  transform: translateZ(0);
  will-change: transform;
}
.b1 { width: 620px; height: 620px; left: -140px; top: -160px; background: radial-gradient(circle at 30% 30%, #7c3aed, transparent 60%); }
.b2 { width: 520px; height: 520px; right: -180px; top: 20%; background: radial-gradient(circle at 60% 40%, #06b6d4, transparent 60%); }
.b3 { width: 460px; height: 460px; left: 30%; bottom: -160px; background: radial-gradient(circle at 50% 50%, #10b981, transparent 60%); }

@media (prefers-reduced-motion: no-preference) {
  @keyframes float {
    0%   { transform: translate3d(0, 0, 0) scale(1); }
    50%  { transform: translate3d(0, -10px, 0) scale(1.02); }
    100% { transform: translate3d(0, 0, 0) scale(1); }
  }
  .b1 { animation: float 18s ease-in-out infinite; }
  .b2 { animation: float 22s ease-in-out infinite 0.5s; }
  .b3 { animation: float 26s ease-in-out infinite 1s; }
}

/* Responsive tweaks */
@media (max-width: 640px) {
  .hero { margin-top: 10vh; border-radius: 20px; }
}