/* UC-CS Teaser — editorial dark, narrower, more typographic */
:root {
  --bg: #06080f;
  --bg-2: #0a0d17;
  --bg-card: #0d1220;
  --bg-elev: #131a2b;
  --line: #1a2238;
  --line-soft: #131a2b;
  --line-strong: #283356;

  --ink-1: #ecf0fa;
  --ink-2: #aab3c8;
  --ink-3: #6a7392;
  --ink-4: #424a66;

  --accent: #6e8bff;
  --accent-soft: rgba(110, 139, 255, 0.12);
  --accent-line: rgba(110, 139, 255, 0.4);
  --purple: #8e7bff;
  --ok: #3ec96e;
  --warn: #e8b94c;
  --rec: #ff4d4d;

  --font-sans: "Geist", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "JetBrains Mono", monospace;
  --font-display: "Fraunces", "Geist", ui-serif, Georgia, serif;
}

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

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink-1);
  font-family: var(--font-sans);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
  scroll-behavior: smooth;
}

.mono { font-family: var(--font-mono); letter-spacing: 0; }

a { color: var(--accent); text-decoration: none; transition: color .15s; }
a:hover { color: #8aa3ff; }

button { font-family: inherit; color: inherit; cursor: pointer; background: none; border: 0; padding: 0; }

::selection { background: var(--accent); color: var(--bg); }

/* ── Layout primitives ─────────────────────────────────────────────────── */

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 28px; }
.wrap-narrow { max-width: 760px; margin: 0 auto; padding: 0 28px; }

.section { padding: 120px 0; position: relative; }
.section.divider { border-top: 1px solid var(--line); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
}
.eyebrow::before {
  content: "";
  width: 20px; height: 1px;
  background: var(--accent);
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .8s cubic-bezier(.16,.84,.3,1), transform .8s cubic-bezier(.16,.84,.3,1);
}
.reveal.in { opacity: 1; transform: none; }

/* ── Nav ───────────────────────────────────────────────────────────────── */

.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px) saturate(1.2);
  background: rgba(6, 8, 15, 0.78);
  border-bottom: 1px solid var(--line-soft);
}
.nav-inner {
  display: flex; align-items: center; gap: 28px;
  height: 60px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 28px;
}
.nav-logo {
  display: inline-flex; align-items: baseline; gap: 10px;
  font-weight: 800; letter-spacing: -0.02em; font-size: 17px;
}
.nav-logo .tag {
  font-family: var(--font-mono); font-weight: 500;
  font-size: 10px; letter-spacing: 0.22em; color: var(--ink-3);
}
.nav-spacer { flex: 1; }
.nav-lang {
  display: inline-flex; align-items: center;
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 6px; padding: 2px;
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.08em;
}
.nav-lang button {
  padding: 5px 10px; border-radius: 4px;
  transition: background .15s, color .15s;
  font-weight: 600; color: var(--ink-3);
}
.nav-lang button.active { color: var(--bg); background: var(--accent); }
.nav-lang button:not(.active):hover { color: var(--ink-1); background: var(--bg-elev); }

/* ── Hero ──────────────────────────────────────────────────────────────── */

.hero {
  position: relative;
  padding: 160px 0 100px;
  overflow: hidden;
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.022) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(60% 80% at 50% 30%, black 0%, transparent 80%);
  -webkit-mask-image: radial-gradient(60% 80% at 50% 30%, black 0%, transparent 80%);
  pointer-events: none;
}
.hero-glow {
  position: absolute; inset: -10% -20% 0;
  background:
    radial-gradient(40% 35% at 25% 20%, rgba(110, 139, 255, 0.18) 0%, transparent 65%),
    radial-gradient(30% 30% at 80% 30%, rgba(142, 123, 255, 0.10) 0%, transparent 60%);
  pointer-events: none;
}
.hero-inner { position: relative; }

.hero h1 {
  font-size: clamp(48px, 8vw, 116px);
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 0.94;
  margin: 0 0 28px;
  max-width: 12ch;
}
.hero h1 .muted { color: var(--ink-3); }
.hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--accent) 0%, var(--purple) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lede {
  font-size: clamp(15px, 1.5vw, 18px);
  color: var(--ink-2);
  max-width: 52ch;
  margin: 0 0 56px;
  line-height: 1.5;
}

.hero-meta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px 6px 8px;
  border: 1px solid var(--line);
  background: var(--bg-card);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-2);
  letter-spacing: 0.06em;
  margin-bottom: 48px;
}
.hero-meta .dot {
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  position: relative;
}
.hero-meta .dot::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid var(--accent);
  opacity: 0.5;
  animation: ring 2s ease-out infinite;
}
@keyframes ring {
  0%   { opacity: 0.7; transform: scale(0.8); }
  100% { opacity: 0;   transform: scale(2);   }
}

/* ── Two doors ─────────────────────────────────────────────────────────── */

.doors {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.door {
  position: relative;
  display: block;
  padding: 36px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 12px;
  min-height: 260px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  transition: border-color .25s, transform .25s, background .25s;
  cursor: pointer;
}
.door::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(80% 60% at 50% 0%, var(--accent-soft) 0%, transparent 60%);
  opacity: 0;
  transition: opacity .25s;
  pointer-events: none;
}
.door:hover {
  border-color: var(--accent-line);
  transform: translateY(-3px);
  background: var(--bg-elev);
}
.door:hover::before { opacity: 1; }

.door .door-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.door h3 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  line-height: 1.05;
}
.door p {
  color: var(--ink-2);
  font-size: 14.5px;
  margin: 0 0 28px;
  max-width: 36ch;
  line-height: 1.55;
}
.door .door-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--accent);
  transition: gap .2s;
}
.door:hover .door-cta { gap: 14px; }

@media (max-width: 760px) {
  .doors { grid-template-columns: 1fr; }
}

/* ── Operate preview ───────────────────────────────────────────────────── */

.preview-wrap {
  margin-top: 56px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  position: relative;
}
.preview-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 13, 23, 0.6);
}
.preview-head .dots { display: inline-flex; gap: 6px; }
.preview-head .dots span { width: 11px; height: 11px; border-radius: 50%; }
.preview-head .url {
  margin: 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
}
.preview-head .out {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
}

.preview-body {
  background: radial-gradient(80% 80% at 50% 0%, rgba(110, 139, 255, 0.06) 0%, transparent 60%), #060810;
  position: relative;
  min-height: 460px;
}

/* ── Hints (what is UCCS) ─────────────────────────────────────────────── */

.hints {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 56px;
}
.hint {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-card);
  transition: border-color .2s, background .2s, transform .2s;
}
.hint:hover {
  border-color: var(--line-strong);
  background: var(--bg-elev);
  transform: translateY(-2px);
}
.hint .num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.18em;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.hint .num::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}
.hint h4 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}
.hint p {
  margin: 0;
  color: var(--ink-2);
  font-size: 13.5px;
  line-height: 1.5;
}

@media (max-width: 880px) { .hints { grid-template-columns: 1fr; } }

/* ── Quote / Manifesto ─────────────────────────────────────────────────── */

.manifesto {
  text-align: center;
  padding: 140px 28px;
  border-top: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.manifesto::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(50% 100% at 50% 0%, rgba(110,139,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.manifesto-text {
  position: relative;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(28px, 4.4vw, 52px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  max-width: 22ch;
  margin: 0 auto;
  color: var(--ink-1);
}
.manifesto-text .muted { color: var(--ink-3); font-style: italic; }
.manifesto-source {
  position: relative;
  margin-top: 32px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.16em;
}

/* ── Waitlist / Signup ─────────────────────────────────────────────────── */

.signup {
  padding: 120px 0;
  border-top: 1px solid var(--line);
  text-align: center;
  position: relative;
}
.signup h2 {
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.04;
  margin: 0 0 16px;
  max-width: 18ch;
  margin-left: auto;
  margin-right: auto;
}
.signup h2 .muted { color: var(--ink-3); }
.signup .signup-sub {
  color: var(--ink-2);
  font-size: 15.5px;
  max-width: 50ch;
  margin: 0 auto 40px;
  line-height: 1.55;
}

.signup-form {
  max-width: 460px;
  margin: 0 auto;
  display: flex;
  gap: 8px;
  padding: 4px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 10px;
  transition: border-color .15s;
}
.signup-form:focus-within { border-color: var(--accent); }
.signup-form input {
  flex: 1;
  background: transparent;
  color: var(--ink-1);
  font-family: inherit;
  font-size: 14px;
  padding: 12px 14px;
  border: 0;
  outline: 0;
}
.signup-form input::placeholder { color: var(--ink-4); }
.signup-form button {
  background: var(--accent);
  color: var(--bg);
  padding: 12px 22px;
  font-size: 13.5px;
  font-weight: 600;
  border-radius: 7px;
  transition: background .15s, transform .15s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.signup-form button:hover { background: #7e97ff; }

.signup-meta {
  margin-top: 24px;
  display: inline-flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
}
.signup-meta .pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
}
.signup-meta .pill .d {
  width: 6px; height: 6px; border-radius: 50%;
}

.signup-success {
  max-width: 460px;
  margin: 0 auto;
  padding: 28px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  border-radius: 10px;
  color: var(--ink-1);
  text-align: left;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  animation: pop .3s cubic-bezier(.16,.84,.3,1);
}
@keyframes pop {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}
.signup-success .check {
  width: 28px; height: 28px;
  background: var(--accent);
  color: var(--bg);
  border-radius: 50%;
  display: grid; place-items: center;
  flex: 0 0 auto;
}
.signup-success strong { display: block; margin-bottom: 4px; font-size: 14.5px; }
.signup-success span.muted { color: var(--ink-2); font-size: 13px; }

/* ── Footer ────────────────────────────────────────────────────────────── */

footer {
  border-top: 1px solid var(--line);
  padding: 36px 0;
  font-size: 12px;
  color: var(--ink-3);
}
.foot {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.foot .brand { color: var(--ink-2); font-weight: 700; font-size: 13px; letter-spacing: -0.01em; }
.foot .brand .tag {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.22em;
  color: var(--ink-3);
  margin-left: 8px;
}
.foot .links {
  display: flex;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
}
.foot .links a { color: var(--ink-3); }
.foot .links a:hover { color: var(--ink-1); }

@media (max-width: 760px) {
  .foot { flex-direction: column; align-items: flex-start; }
}