/* quantum website. Design tokens only; no rogue hex values in rules. */

@font-face {
  font-family: "Inter";
  src: url("assets/InterVariable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  font-size: 100%;
  --bg: #08090a;
  --bg-raised: #0f1011;
  --bg-hover: #141516;
  --text: #f7f8f8;
  --text-secondary: #8a8f98;
  --border: rgba(255, 255, 255, 0.08);
  --accent: #5e6ad2;
  /* terminal palette (content, not decoration) */
  --term-green: #3fb950;
  --term-yellow: #d29922;
  --term-red: #f85149;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
}

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

body {
  background: var(--bg);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-optical-sizing: auto;
  font-size: 0.9375rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: color-mix(in srgb, var(--accent) 35%, transparent);
  color: var(--text);
}

.container {
  max-width: 64rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

a {
  color: var(--text);
  text-decoration: none;
  transition: color 150ms ease-out;
}

a:hover {
  color: var(--accent);
}

a:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 0.25rem;
}

p a {
  color: var(--accent);
}

p a:hover {
  text-decoration: underline;
}

code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--text);
  background: var(--bg-hover);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  padding: 0.0625rem 0.3125rem;
}

/* ---- header ---------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.wordmark {
  font-weight: 590;
  font-size: 1rem;
  letter-spacing: -0.012em;
  color: var(--text);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-token {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.nav-token:hover {
  color: var(--text);
}

.nav-hint {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.25rem;
  height: 1.25rem;
  padding: 0 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: var(--bg-hover);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
}

/* ---- hero ------------------------------------------------------------ */

.hero {
  padding: 7.5rem 0 5rem;
}

h1 {
  color: var(--text);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 538;
  letter-spacing: -0.028em;
  line-height: 1.06;
  text-wrap: balance;
}

.lede {
  max-width: 36rem;
  margin-top: 1.5rem;
  font-size: 1.125rem;
  line-height: 1.6;
  letter-spacing: -0.011em;
}

.console-cta {
  margin-top: 2.5rem;
  max-width: 36rem;
}

.console-input {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  height: 3rem;
  padding: 0 0.75rem 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  color: var(--text);
  transition: border-color 150ms ease-out, background 150ms ease-out;
}

.console-input:hover {
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
  background: var(--bg-hover);
  color: var(--text);
}

.console-input .prompt {
  color: var(--text-secondary);
}

.console-input .command {
  flex: 1;
}

.console-input kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  height: 1.5rem;
  padding: 0 0.375rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  background: var(--bg-hover);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
}

.view-source {
  display: inline-block;
  margin-top: 0.875rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.view-source:hover {
  color: var(--text);
}

/* ---- terminal -------------------------------------------------------- */

.terminal {
  margin-top: 4.5rem;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 0.625rem;
  overflow: hidden;
}

.terminal-bar {
  padding: 0.625rem 1.25rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.02em;
  color: var(--text-secondary);
}

.terminal-body {
  padding: 1.5rem 1.75rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--text);
  overflow-x: auto;
}

.t-dim { color: var(--text-secondary); }
.t-green { color: var(--term-green); }
.t-yellow { color: var(--term-yellow); }
.t-red { color: var(--term-red); }
.t-accent { color: var(--accent); }

.cursor {
  display: inline-block;
  width: 0.5em;
  height: 1.05em;
  vertical-align: text-bottom;
  background: var(--text-secondary);
  animation: blink 1.2s steps(1) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .cursor { animation: none; }
  a, .btn { transition: none; }
}

/* ---- features -------------------------------------------------------- */

.features {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
}

.feature-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3.5rem 2.5rem;
}

.feature-grid h2 {
  color: var(--text);
  font-size: 1rem;
  font-weight: 590;
  letter-spacing: -0.011em;
  margin-bottom: 0.625rem;
}

.feature-grid p {
  font-size: 0.875rem;
  line-height: 1.65;
}

/* ---- install --------------------------------------------------------- */

.install {
  padding: 6rem 0 7rem;
  border-top: 1px solid var(--border);
}

.install h2 {
  color: var(--text);
  font-size: 1.75rem;
  font-weight: 590;
  letter-spacing: -0.022em;
  margin-bottom: 0.75rem;
}

.install p {
  max-width: 36rem;
}

.codeblock {
  margin-top: 1.5rem;
  padding: 1.5rem 1.75rem;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 0.625rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.9;
  color: var(--text);
  overflow-x: auto;
}

.install-note {
  margin-top: 1.25rem;
  font-size: 0.8125rem;
}

/* ---- footer ---------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0 4rem;
}

.footer-strip {
  display: flex;
  border-left: 1px solid var(--border);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.footer-cell {
  flex: 1;
  padding: 1.125rem 1.5rem;
  border-right: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  transition: color 150ms ease-out, background 150ms ease-out;
}

a.footer-cell:hover {
  color: var(--text);
  background: var(--bg-hover);
}

/* ---- responsive ------------------------------------------------------ */

@media (max-width: 48rem) {
  .hero { padding: 5rem 0 3.5rem; }
  .terminal { margin-top: 3rem; }
  .features, .install { padding: 4rem 0; }
  .feature-grid { grid-template-columns: 1fr; gap: 2.25rem; }
  .footer-strip { flex-direction: column; border-left: none; }
  .footer-cell { border-right: none; border-bottom: 1px solid var(--border); }
  .footer-cell:last-child { border-bottom: none; }
}

@media (min-width: 48rem) and (max-width: 64rem) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}