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

:root {
  --bg:        #080d18;
  --surface:   #0f1623;
  --surface-2: #141c2b;
  --border:    rgba(255,255,255,0.07);
  --accent:    #c0281e;
  --text-1:    #f1f5f9;
  --text-2:    #94a3b8;
  --text-3:    #4a5568;
  --radius:    14px;
  --radius-sm: 8px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text-1);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Background ─────────────────────────────────────── */
.page-shell { position: relative; min-height: 100vh; }

.noise {
  pointer-events: none;
  position: fixed; inset: 0; z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  background-size: 200px 200px;
  opacity: 0.4;
}

.orb {
  pointer-events: none;
  position: fixed; z-index: 0;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.22;
}
.orb-one {
  width: 520px; height: 520px;
  top: -80px; left: -60px;
  background: radial-gradient(circle, #9b1c1c 0%, #450a0a 60%, transparent 100%);
}
.orb-two {
  width: 400px; height: 400px;
  bottom: 10%; right: -80px;
  background: radial-gradient(circle, #1e3a5f 0%, transparent 70%);
  opacity: 0.18;
}

.grid-lines {
  pointer-events: none;
  position: fixed; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
}

/* ── Topbar ─────────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 clamp(24px, 5vw, 80px);
  height: 60px;
  background: rgba(8,13,24,0.75);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--text-1);
}
.brand-mark img {
  width: 32px; height: 32px;
  border-radius: 8px;
  display: block;
}
.brand-text {
  font-size: 1rem; font-weight: 600; letter-spacing: -0.01em;
}

.status-pill {
  font-size: 0.72rem; font-weight: 500;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-2);
  background: var(--surface);
  letter-spacing: 0.01em;
}

/* ── Sections common ────────────────────────────────── */
main { position: relative; z-index: 1; }

section {
  padding: clamp(64px, 10vw, 120px) clamp(24px, 5vw, 80px);
}

.section-heading {
  max-width: 680px;
  margin-bottom: clamp(40px, 6vw, 64px);
}
.section-heading h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-top: 10px;
}

.eyebrow {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ── Hero ───────────────────────────────────────────── */
.hero {
  min-height: calc(100vh - 60px);
  display: flex; align-items: center;
  gap: clamp(40px, 6vw, 80px);
  padding-top: clamp(48px, 8vh, 100px);
  padding-bottom: clamp(48px, 8vh, 100px);
}

.hero-copy {
  flex: 1 1 420px;
  max-width: 600px;
}
.hero-copy .eyebrow { margin-bottom: 14px; }

.hero-copy h1 {
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 20px;
}

.hero-text {
  font-size: clamp(0.9rem, 1.4vw, 1.05rem);
  color: var(--text-2);
  max-width: 480px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.primary-button, .secondary-button {
  display: inline-flex; align-items: center;
  padding: 13px 26px;
  font-size: 0.9rem; font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: opacity 0.15s, transform 0.15s;
  cursor: pointer;
  white-space: nowrap;
}
.primary-button:active, .secondary-button:active { transform: scale(0.97); }

.primary-button {
  background: var(--surface-2);
  color: var(--text-1);
  border: 1px solid rgba(255,255,255,0.12);
}
.primary-button:hover { opacity: 0.85; }
.download-btn { gap: 8px; }
.download-linux { background: #0d1220; border-color: rgba(255,255,255,0.08); }
.download-android { background: #0d1a0d; border-color: rgba(100,220,100,0.2); }

.secondary-button {
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border);
}
.secondary-button:hover { color: var(--text-1); border-color: rgba(255,255,255,0.18); }

/* ── Hero Visual ────────────────────────────────────── */
.hero-visual {
  flex: 1 1 340px;
  position: relative;
  display: flex; align-items: center; justify-content: center;
  max-width: 520px;
  min-height: 380px;
}

.visual-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.main-card {
  width: 100%;
  max-width: 380px;
  min-height: 300px;
  padding: 0 0 24px;
  position: relative;
  overflow: hidden;
}

.card-topline {
  width: 100%; height: 90px;
  background: linear-gradient(135deg, #6b1313 0%, #2d0a0a 50%, #0f1623 100%);
  border-radius: var(--radius) var(--radius) 0 0;
  margin-bottom: 20px;
}

.mini-label {
  display: inline-flex; align-items: center;
  font-size: 0.72rem; font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.07);
  color: var(--text-2);
  margin: 0 20px 12px;
  border: 1px solid var(--border);
}
.mini-label::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #22c55e;
  margin-right: 6px;
}

.visual-title {
  font-size: 1.35rem; font-weight: 700;
  letter-spacing: -0.02em;
  padding: 0 20px;
  margin-bottom: 20px;
  line-height: 1.3;
}

.visual-lines {
  display: flex; flex-direction: column; gap: 8px;
  padding: 0 20px;
}
.visual-lines span {
  height: 6px;
  border-radius: 4px;
  background: var(--surface-2);
}
.visual-lines span:nth-child(1) { width: 80%; }
.visual-lines span:nth-child(2) { width: 55%; }
.visual-lines span:nth-child(3) { width: 68%; }

.signal-cluster {
  position: absolute; bottom: 20px; right: 20px;
  display: flex; gap: 5px; align-items: center;
}
.signal-cluster span {
  width: 4px;
  background: var(--accent);
  border-radius: 2px;
  opacity: 0.5;
}
.signal-cluster span:nth-child(1) { height: 8px; }
.signal-cluster span:nth-child(2) { height: 14px; opacity: 0.7; }
.signal-cluster span:nth-child(3) { height: 20px; opacity: 1; }

.side-card {
  position: absolute;
  padding: 10px 16px;
  font-size: 0.75rem; font-weight: 600;
  color: var(--text-2);
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  white-space: nowrap;
  backdrop-filter: blur(8px);
}
.side-card-top  { top: 10px;  right: -10px; }
.side-card-bottom { bottom: 30px; right: -20px; }

/* ── About ──────────────────────────────────────────── */
.about { border-top: 1px solid var(--border); }
.about-text {
  max-width: 640px;
  color: var(--text-2);
  font-size: clamp(0.9rem, 1.3vw, 1.05rem);
  line-height: 1.75;
}

/* ── Feature grid ───────────────────────────────────── */
.features { border-top: 1px solid var(--border); }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.feature-card, .architecture-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s;
}
.feature-card:hover, .architecture-card:hover {
  border-color: rgba(255,255,255,0.14);
}

.card-index {
  font-size: 0.65rem; font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-3);
  margin-bottom: 14px;
}

.feature-card h3, .architecture-card h3 {
  font-size: 0.95rem; font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.feature-card p, .architecture-card p {
  font-size: 0.85rem; color: var(--text-2); line-height: 1.65;
}

/* ── Architecture ───────────────────────────────────── */
.architecture { border-top: 1px solid var(--border); }
.architecture-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

/* ── Stack ──────────────────────────────────────────── */
.stack { border-top: 1px solid var(--border); }

.stack-shell {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.stack-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.stack-panel h3 {
  font-size: 0.9rem; font-weight: 700;
  margin-bottom: 16px;
}
.stack-list {
  list-style: none;
  display: flex; flex-direction: column; gap: 8px;
}
.stack-list li {
  font-size: 0.83rem; color: var(--text-2); line-height: 1.5;
  padding-left: 14px;
  position: relative;
}
.stack-list li::before {
  content: '–';
  position: absolute; left: 0;
  color: var(--text-3);
}

/* ── Assurance ──────────────────────────────────────── */
.assurance { border-top: 1px solid var(--border); }
.assurance-card {
  max-width: 800px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(32px, 5vw, 56px);
}
.assurance-card .eyebrow { margin-bottom: 14px; }
.assurance-card h2 {
  font-size: clamp(1.3rem, 2.8vw, 2rem);
  font-weight: 700; letter-spacing: -0.03em;
  line-height: 1.25; margin-bottom: 18px;
}
.assurance-card p {
  font-size: clamp(0.85rem, 1.2vw, 0.95rem);
  color: var(--text-2); line-height: 1.75;
}

/* ── Toast ──────────────────────────────────────────── */
.toast {
  position: fixed; bottom: 24px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 13px 22px;
  font-size: 0.85rem; color: var(--text-2);
  z-index: 200;
  opacity: 0;
  transition: opacity 0.25s, transform 0.25s;
  pointer-events: none;
  white-space: nowrap;
}
.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── Reveal ─────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.in-view {
  opacity: 1;
  transform: none;
}

/* ── Responsive ─────────────────────────────────────── */
@media (max-width: 760px) {
  .hero {
    flex-direction: column;
    min-height: auto;
    padding-top: 48px;
  }
  .hero-visual { display: none; }
  .side-card { display: none; }
}