/* =========================================================================
   PARALLAX — style.css
   Design tokens
   Color:  base #0F1626 (night navy) / surface #17203399 (over base) /
           ink #E9EDF3 / muted #8B96A8 / signal amber #FFB74D /
           delta blue #7DD3FC / warn rose #F5808C
   Type:   Display "Fraunces" (headlines) / "Inter" (body/UI) /
           "IBM Plex Mono" (benchmark numbers + code/prompt blocks only)
   Layout: left-aligned, single-column reading measure (~72ch), a
           horizontal "gauge strip" as the one hero motif.
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,380..600&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --base: #0F1626;
  --surface: #161F30;
  --surface-2: #1C2740;
  --line: #2A3550;
  --ink: #E9EDF3;
  --muted: #8B96A8;
  --amber: #FFB74D;
  --amber-dim: #7A5A2E;
  --blue: #7DD3FC;
  --rose: #F5808C;
  --measure: 68ch;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--base);
  color: var(--ink);
  font-family: "Inter", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

a { color: var(--blue); }

::selection { background: var(--amber-dim); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0 0 0.4em;
}

p { max-width: var(--measure); }

/* ---------------- Top bar ---------------- */
.topbar {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}
.topbar .wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  font-family: "Fraunces", serif;
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.brand span { color: var(--amber); }
.topnav { display: flex; gap: 22px; font-size: 14px; }
.topnav a { color: var(--muted); text-decoration: none; }
.topnav a:hover { color: var(--ink); }

/* ---------------- Hero ---------------- */
.hero { padding: 64px 0 40px; }
.hero h1 {
  font-size: clamp(32px, 5vw, 48px);
  max-width: 18ch;
  color: var(--ink);
}
.hero .lede {
  color: var(--muted);
  font-size: 18px;
  max-width: 62ch;
  margin-bottom: 8px;
}
.hero .lede a { color: var(--amber); }

.source-line {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  color: var(--muted);
  margin-top: 18px;
}

/* ---------------- Gauge strip (the one hero motif) ---------------- */
.gauge-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: 36px;
}
@media (max-width: 760px) {
  .gauge-strip { grid-template-columns: repeat(2, 1fr); }
}
.gauge {
  background: var(--surface);
  padding: 20px 18px;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 480ms ease, transform 480ms ease;
  transition-delay: var(--delay, 0ms);
}
.gauge.in { opacity: 1; transform: translateY(0); }
.gauge-stat {
  font-family: "IBM Plex Mono", monospace;
  font-size: 26px;
  color: var(--amber);
  font-weight: 500;
}
.gauge-label {
  color: var(--muted);
  font-size: 12.5px;
  margin: 4px 0 12px;
  min-height: 32px;
}
.gauge-bar {
  height: 3px;
  background: var(--line);
  margin-bottom: 12px;
  position: relative;
  overflow: hidden;
}
.gauge-fill {
  position: absolute; inset: 0 auto 0 0;
  width: 0;
  background: var(--amber);
  transition: width 900ms ease 200ms;
}
.gauge.in .gauge-fill { width: 78%; }
.gauge-title { font-size: 13.5px; color: var(--ink); }

/* ---------------- Sections ---------------- */
section { padding: 56px 0; border-top: 1px solid var(--line); }
.section-head { margin-bottom: 28px; }
.section-head .eyebrow {
  color: var(--blue);
  font-size: 13px;
  margin-bottom: 6px;
}
.section-head h2 { font-size: 28px; }
.section-head p { color: var(--muted); }

/* ---------------- Capability cards ---------------- */
.cap-grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.cap-card {
  background: var(--surface);
  padding: 22px 24px;
}
.cap-card header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.cap-card h3 { font-size: 17px; margin-bottom: 10px; }
.cap-tag {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
}
.cap-card p { color: var(--ink); font-size: 14.5px; margin-bottom: 14px; }
.cap-caveat {
  border-left: 2px solid var(--rose);
  padding: 8px 0 8px 14px;
  font-size: 13.5px;
  color: var(--muted);
  margin-bottom: 12px;
}
.cap-caveat span {
  display: block;
  color: var(--rose);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  margin-bottom: 3px;
}
.cap-source {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  color: var(--muted);
  opacity: 0.8;
}

/* ---------------- Model picker ---------------- */
.model-group { margin-bottom: 18px; }
.model-group-label {
  font-size: 12.5px;
  color: var(--muted);
  margin-bottom: 8px;
}
.model-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 8px 14px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  font-family: inherit;
  transition: border-color 160ms ease, background 160ms ease;
}
.chip:hover { border-color: var(--muted); }
.chip.active { border-color: var(--amber); background: var(--surface-2); }
.chip-name { font-size: 14px; }
.chip-dev { font-size: 11px; color: var(--muted); }

.model-blurb {
  margin-top: 16px;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 14px;
  color: var(--muted);
}
.model-blurb strong { color: var(--ink); }

/* ---------------- Prompt library ---------------- */
.library-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 22px 0 6px;
}
.cat-filter { display: flex; flex-wrap: wrap; gap: 6px; }
.cat-pill {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 12.5px;
  padding: 6px 12px;
  cursor: pointer;
  font-family: inherit;
}
.cat-pill.active { color: var(--base); background: var(--blue); border-color: var(--blue); }
#search {
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 8px 12px;
  font-family: inherit;
  font-size: 13px;
  min-width: 220px;
  margin-left: auto;
}
#prompt-count {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  color: var(--muted);
  margin: 10px 0 18px;
}

.prompt-item {
  border: 1px solid var(--line);
  border-top: none;
  background: var(--surface);
}
.prompt-item:first-of-type { border-top: 1px solid var(--line); }
.prompt-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
}
.prompt-item summary::-webkit-details-marker { display: none; }
.prompt-num {
  font-family: "IBM Plex Mono", monospace;
  color: var(--muted);
  font-size: 12px;
}
.prompt-title { flex: 1; font-size: 14.5px; }
.prompt-cat {
  font-size: 11px;
  color: var(--blue);
  border: 1px solid var(--line);
  padding: 3px 8px;
}
.prompt-body {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--base);
  padding: 16px 18px;
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 360px;
  overflow-y: auto;
  border-top: 1px solid var(--line);
}
.prompt-actions {
  display: flex;
  gap: 10px;
  padding: 12px 18px 18px;
}
.btn-copy, .btn-send {
  font-family: inherit;
  font-size: 12.5px;
  padding: 8px 14px;
  cursor: pointer;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
}
.btn-copy:hover { border-color: var(--amber); color: var(--amber); }
.btn-send:hover { border-color: var(--blue); color: var(--blue); }

/* ---------------- Playground ---------------- */
.pg-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 760px) { .pg-grid { grid-template-columns: 1fr; } }
.pg-field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.pg-field label { font-size: 12.5px; color: var(--muted); }
.pg-field select, .pg-field input, .pg-field textarea {
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 10px 12px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 12.5px;
}
.pg-field textarea { min-height: 90px; resize: vertical; }
#pg-system { min-height: 200px; }
#pg-user { min-height: 90px; }
.pg-note { font-size: 12px; color: var(--muted); }
.pg-remember { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--muted); }
#pg-run {
  background: var(--amber);
  color: #241705;
  border: none;
  padding: 12px 22px;
  font-family: inherit;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  margin-top: 6px;
}
#pg-run:hover { filter: brightness(1.08); }
#pg-output {
  background: var(--base);
  border: 1px solid var(--line);
  padding: 16px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 12.5px;
  white-space: pre-wrap;
  min-height: 160px;
  max-height: 480px;
  overflow-y: auto;
  color: var(--ink);
}
.pg-disclaimer {
  font-size: 12.5px;
  color: var(--muted);
  border-left: 2px solid var(--blue);
  padding-left: 14px;
  margin-bottom: 20px;
}

/* ---------------- Footer ---------------- */
footer {
  border-top: 1px solid var(--line);
  padding: 32px 0 60px;
  color: var(--muted);
  font-size: 13px;
}
footer a { color: var(--muted); }
footer .foot-grid {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}