/* SpectraControl landing — palette matches the app (frontend/index.html :root). */

:root {
  --bg: #0c0c0f;
  --surface: #13131a;
  --surface2: #1a1a25;
  --surface3: #20202d;
  --border: #ffffff0f;
  --border2: #ffffff18;
  --text: #e8e8f0;
  --text-dim: #c0c4d4;
  --text-muted: #9095a8;
  --accent: #f5a623;
  --accent2: #ff6b35;
  --sync: #22d3a5;
  --sync-dim: #22d3a530;
  --danger: #ff4757;
  --radius: 10px;
  --radius-lg: 16px;
  --sans: "Syne", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "DM Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --max: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  font-weight: 500;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(900px 600px at 85% -10%, #f5a62318, transparent 60%),
    radial-gradient(700px 500px at -5% 20%, #22d3a514, transparent 60%),
    radial-gradient(800px 700px at 50% 90%, #ff6b3510, transparent 65%);
  background-attachment: fixed;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent2); }

code, pre { font-family: var(--mono); font-weight: 400; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  padding: 1rem 1.5rem;
  background: color-mix(in srgb, var(--bg) 75%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.01em;
  font-size: 1.05rem;
}
.brand img { display: block; }
.nav nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.nav nav a {
  color: var(--text-dim);
  font-size: 0.92rem;
  letter-spacing: 0.02em;
}
.nav nav a:hover { color: var(--text); }

/* ---------- Hero ---------- */
.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 4.5rem 1.5rem 3rem;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: center;
}
.eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--border2);
  border-radius: 999px;
  margin-bottom: 1.25rem;
}
.hero h1 {
  font-size: clamp(2.2rem, 4.6vw, 3.8rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0 0 1.2rem;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent2) 60%, var(--sync) 110%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lede {
  font-size: 1.1rem;
  color: var(--text-dim);
  margin: 0 0 2rem;
  max-width: 36rem;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius);
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 200ms ease, background 200ms ease, border-color 200ms ease;
}
.btn.primary {
  background: var(--accent);
  color: #0c0c0f;
}
.btn.primary:hover {
  background: var(--accent2);
  transform: translateY(-1px);
}
.btn.ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border2);
}
.btn.ghost:hover { border-color: #ffffff60; }

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}
.badges img { height: 20px; }

.hero-shot {
  position: relative;
  display: flex;
  justify-content: center;
}
.hero-shot img {
  max-width: 100%;
  width: min(420px, 100%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border2);
  box-shadow:
    0 30px 80px -20px rgba(0,0,0,0.6),
    0 0 0 1px var(--border);
}

/* ---------- Sections ---------- */
section { padding: 4rem 1.5rem; }
.section-title {
  max-width: var(--max);
  margin: 0 auto 0.6rem;
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.section-lede {
  max-width: var(--max);
  margin: 0 auto 2.5rem;
  color: var(--text-dim);
  font-size: 1.02rem;
}

/* ---------- Features ---------- */
.feature-grid {
  max-width: var(--max);
  margin: 2.5rem auto 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}
.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  transition: border-color 200ms ease, transform 200ms ease;
}
.feature:hover {
  border-color: var(--border2);
  transform: translateY(-2px);
}
.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 100%);
  color: #0c0c0f;
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}
.feature h3 {
  margin: 0 0 0.5rem;
  font-size: 1.08rem;
  font-weight: 700;
}
.feature p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}
.feature code {
  background: var(--surface3);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.85em;
}

/* ---------- Screenshots ---------- */
.shots { background: linear-gradient(180deg, transparent, #ffffff03 50%, transparent); }
.shot-grid {
  max-width: var(--max);
  margin: 1.5rem auto 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.shot {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 200ms ease, transform 200ms ease;
}
.shot:hover {
  border-color: var(--border2);
  transform: translateY(-2px);
}
.shot.wide {
  max-width: var(--max);
  margin: 0 auto 1.5rem;
}
.shot.wide img { max-height: 560px; object-fit: contain; background: #0c0c0f; }
.shot img {
  display: block;
  width: 100%;
  height: auto;
  background: #0c0c0f;
}
.shot figcaption {
  padding: 0.9rem 1.1rem 1.1rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.cap-num {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
}

/* ---------- Install ---------- */
.install-grid {
  max-width: var(--max);
  margin: 2rem auto 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}
.install-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}
.install-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.install-card p {
  margin: 0 0 0.9rem;
  color: var(--text-dim);
  font-size: 0.92rem;
}
.tag {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  font-weight: 500;
}
.tag-accent { background: color-mix(in srgb, var(--sync) 18%, transparent); color: var(--sync); }
.install-card pre {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  color: var(--text);
  margin: 0 0 0.75rem;
}
.install-card small {
  color: var(--text-muted);
  font-size: 0.82rem;
}
.install-card code {
  background: var(--surface3);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.85em;
}
.reqs {
  max-width: var(--max);
  margin: 2rem auto 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem 1.4rem;
}
.reqs summary {
  cursor: pointer;
  font-weight: 700;
  padding: 0.4rem 0;
  list-style: none;
}
.reqs summary::after {
  content: "+";
  float: right;
  color: var(--accent);
  font-family: var(--mono);
  transition: transform 200ms ease;
}
.reqs[open] summary::after { content: "−"; }
.reqs ul { margin: 0.5rem 0 0.75rem 1.2rem; color: var(--text-dim); }
.reqs p { margin: 0.5rem 0 0; color: var(--text-dim); font-size: 0.95rem; }
.reqs code {
  background: var(--surface3);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.88em;
}

/* ---------- Stack ---------- */
.stack-grid {
  max-width: var(--max);
  margin: 2rem auto 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.6rem;
  font-family: var(--mono);
}
.stack-grid > div {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  font-size: 0.88rem;
}
.stack-grid strong {
  color: var(--text);
  font-weight: 500;
}
.stack-grid span {
  color: var(--text-muted);
  text-align: right;
}

/* ---------- CTA foot ---------- */
.cta-foot {
  max-width: var(--max);
  margin: 0 auto;
  padding: 5rem 1.5rem;
  text-align: center;
}
.cta-foot h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 700;
  margin: 0 0 0.75rem;
}
.cta-foot p {
  color: var(--text-dim);
  max-width: 38rem;
  margin: 0 auto 1.75rem;
}
.cta-foot .cta-row { justify-content: center; }

/* ---------- Footer ---------- */
.foot {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-family: var(--mono);
  font-size: 0.82rem;
  display: grid;
  gap: 0.5rem;
}
.foot a { color: var(--text-dim); }
.foot a:hover { color: var(--text); }
.foot-fine { font-size: 0.75rem; max-width: 38rem; margin: 0 auto; line-height: 1.5; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 2.5rem;
    gap: 2rem;
  }
  .hero-shot img { width: min(340px, 100%); }
  .nav nav { gap: 0.85rem; }
  .nav nav a { font-size: 0.86rem; }
  section { padding: 3rem 1rem; }
}
@media (max-width: 520px) {
  .nav { padding: 0.85rem 1rem; }
  .brand span { display: none; }
  .badges img { height: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}