/* ==========================================================================
   Deckboard — marketing pages shared styles [MARKETING]
   Dark retro-terminal aesthetic per ARCHITECTURE.md §14:
   near-black page, warm off-white type, amber accent, condensed headlines.
   No frameworks, no build step. Modern evergreen browsers.
   ========================================================================== */

:root {
  --bg: #0a0a09;
  --bg-raised: #121110;
  --bg-card: #14130f;
  --ink: #f2ede3;
  --ink-dim: #a89f8f;
  --ink-faint: #6f685c;
  --amber: #f5a623;
  --amber-hi: #ffc24d;
  --line: #262420;
  --line-soft: #1c1a16;
  --good: #3ecf6e;
  --bad: #e05b4f;
  --radius: 10px;
  --font-ui: system-ui, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: "Arial Narrow", "Helvetica Neue Condensed", "Segoe UI", system-ui, sans-serif;
  --font-mono: ui-monospace, "Cascadia Mono", "SF Mono", Consolas, Menlo, monospace;
  /* fallback-board color chips (mirror engine charset chips) */
  --c-red: #ff4d42;
  --c-orange: #ff9a3d;
  --c-yellow: #ffd23f;
  --c-green: #3ecf6e;
  --c-blue: #4a9df7;
  --c-violet: #b385f7;
  --c-white: #f5f2ea;
  --c-black: #191919;
}

* { box-sizing: border-box; }

html {
  background: var(--bg);
  color: var(--ink);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { max-width: 100%; }

a { color: var(--amber); text-decoration: none; }
a:hover { color: var(--amber-hi); text-decoration: underline; }

:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; border-radius: 4px; }

.wrap { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.wrap-wide { max-width: 1280px; margin: 0 auto; padding: 0 20px; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--amber); color: #000; padding: 8px 14px; z-index: 100;
  font-weight: 700; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- type ---------- */

h1, h2, h3 {
  font-family: var(--font-display);
  font-stretch: condensed;
  text-transform: uppercase;
  letter-spacing: -0.015em;
  line-height: 1.05;
  margin: 0 0 0.4em;
  font-weight: 800;
}

h1 { font-size: clamp(2.4rem, 6.5vw, 4.4rem); }
h2 { font-size: clamp(1.7rem, 4vw, 2.7rem); }
h3 { font-size: clamp(1.15rem, 2.4vw, 1.5rem); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 14px;
}

.sub {
  color: var(--ink-dim);
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  max-width: 46em;
  margin: 0 auto 26px;
}

.center { text-align: center; }

/* ---------- buttons & pills ---------- */

.btn {
  display: inline-block;
  font: 700 1rem var(--font-ui);
  padding: 12px 22px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.12s ease, background 0.12s ease, border-color 0.12s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary { background: var(--amber); color: #000; }
.btn-primary:hover { background: var(--amber-hi); color: #000; }

.btn-ghost {
  background: transparent; color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--amber); color: var(--amber-hi); }

.btn-sm { padding: 8px 14px; font-size: 0.88rem; }

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

.pill {
  display: inline-block;
  font: 600 0.72rem var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber);
  border: 1px solid color-mix(in srgb, var(--amber) 45%, transparent);
  border-radius: 999px;
  padding: 2px 10px;
  vertical-align: middle;
  white-space: nowrap;
}
.pill-dim { color: var(--ink-faint); border-color: var(--line); }

.tick { color: var(--amber); font-weight: 800; }
.cross { color: var(--ink-faint); }

/* ---------- nav ---------- */

.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}
.nav-inner {
  max-width: 1280px; margin: 0 auto; padding: 12px 20px;
  display: flex; align-items: center; gap: 26px;
}
.logo {
  font-family: var(--font-display);
  font-stretch: condensed;
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: 0.04em;
  color: var(--ink);
  text-transform: uppercase;
}
.logo:hover { color: var(--amber); text-decoration: none; }
.logo .dot { color: var(--amber); }
.nav-links { display: flex; gap: 20px; align-items: center; margin-left: auto; }
.nav-links a { color: var(--ink-dim); font-size: 0.95rem; }
.nav-links a:hover { color: var(--ink); text-decoration: none; }
.nav-links .btn { color: #000; }

@media (max-width: 720px) {
  .nav-links a:not(.btn) { display: none; }
  .nav-links a.nav-keep { display: inline; }
}

/* ---------- sections ---------- */

section { padding: 72px 0; }
section.tight { padding: 44px 0; }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 44px; }

.hr-glow {
  border: 0; height: 1px; margin: 0;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
}

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

.hero { padding: 56px 0 0; text-align: center; }
.hero .sub { margin-bottom: 30px; }

.hero-board-shell { position: relative; margin-top: 44px; background: #000; }
.hero-board {
  height: clamp(300px, 56vh, 540px);
  width: 100%;
}
.sound-chip {
  position: absolute; right: 16px; bottom: 16px; z-index: 5;
  font: 600 0.8rem var(--font-mono);
  letter-spacing: 0.06em;
  background: rgba(10, 10, 9, 0.82);
  color: var(--ink-dim);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 14px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.sound-chip:hover, .sound-chip[aria-pressed="true"] { color: var(--amber); border-color: var(--amber); }

/* ---------- board containers & static fallback renderer ---------- */

.board {
  position: relative;
  background: #000;
  overflow: hidden;
}
.board .noscript-note, .noscript-note {
  color: var(--ink-dim); padding: 20px; font-size: 0.9rem; text-align: center; display: block;
}

/* static fallback board (used while engine loads / on failure / reduced motion) */
.sfb { display: flex; align-items: center; justify-content: center; background: var(--fb-bg, #000); }
.sfb-grid { display: grid; }
.sft {
  display: flex; align-items: center; justify-content: center;
  width: calc(var(--sft-h) * 0.75);
  height: var(--sft-h);
  border-radius: calc(var(--sft-h) * 0.08);
  font-family: var(--font-display), var(--font-mono);
  font-stretch: condensed;
  font-weight: 700;
  font-size: calc(var(--sft-h) * 0.78);
  line-height: 1;
  color: var(--fb-glyph, #f4efe4);
  /* faked hinge: lighter upper half, dark split line, darker lower half */
  background:
    linear-gradient(180deg,
      color-mix(in srgb, var(--fb-tile, #151513) 92%, #fff) 0%,
      var(--fb-tile, #151513) 47%,
      #000 49.4%, #000 50.6%,
      color-mix(in srgb, var(--fb-tile, #151513) 88%, #000) 52%,
      color-mix(in srgb, var(--fb-tile, #151513) 72%, #000) 100%);
  user-select: none;
}
.sft.b { font-weight: 900; }
.sft.c-red { color: var(--c-red); }     .sft.c-orange { color: var(--c-orange); }
.sft.c-yellow { color: var(--c-yellow); } .sft.c-green { color: var(--c-green); }
.sft.c-blue { color: var(--c-blue); }   .sft.c-violet { color: var(--c-violet); }
.sft.c-white { color: var(--c-white); } .sft.c-black { color: var(--c-black); }
.sft.chip { color: transparent; }
.sft.chip.c-red { background: var(--c-red); }     .sft.chip.c-orange { background: var(--c-orange); }
.sft.chip.c-yellow { background: var(--c-yellow); } .sft.chip.c-green { background: var(--c-green); }
.sft.chip.c-blue { background: var(--c-blue); }   .sft.chip.c-violet { background: var(--c-violet); }
.sft.chip.c-white { background: var(--c-white); } .sft.chip.c-black { background: var(--c-black); }

/* fallback theme variable sets (mirror engine themes §6) */
.sfb[data-sftheme="classic"]  { --fb-bg: #000; --fb-tile: #151513; --fb-glyph: #f4efe4; }
.sfb[data-sftheme="amber"]    { --fb-bg: #000; --fb-tile: #131210; --fb-glyph: #f5a623; }
.sfb[data-sftheme="terminal"] { --fb-bg: #000; --fb-tile: #101210; --fb-glyph: #4ade80; }
.sfb[data-sftheme="paper"]    { --fb-bg: #e8e4dc; --fb-tile: #f4f1ea; --fb-glyph: #1c1a16; }
.sfb[data-sftheme="navy"]     { --fb-bg: #000; --fb-tile: #0e1626; --fb-glyph: #dbe6ff; }
.sfb[data-sftheme="crimson"]  { --fb-bg: #000; --fb-tile: #1d0d0f; --fb-glyph: #ff7a6b; }

/* change "pop" on fallback tiles — opacity/transform only, compositor safe */
@keyframes sft-pop {
  0% { transform: scaleY(0.55); opacity: 0.4; }
  100% { transform: scaleY(1); opacity: 1; }
}
.sft.pop { animation: sft-pop 0.22s ease-out; }

/* loading shimmer while the live engine boots */
@keyframes sfb-breathe { 0%, 100% { opacity: 1; } 50% { opacity: 0.62; } }
.is-loading .sfb-grid { animation: sfb-breathe 1.6s ease-in-out infinite; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .sft.pop, .is-loading .sfb-grid { animation: none; }
  .btn:hover { transform: none; }
}

/* "typical simulator" comparison variant: loose, gappy, small glyphs */
.sfb-loose .sfb-grid { gap: calc(var(--sft-h) * 0.22) !important; }
.sfb-loose .sft {
  font-size: calc(var(--sft-h) * 0.52);
  font-family: var(--font-mono);
  font-stretch: normal;
  font-weight: 400;
  letter-spacing: 0.08em;
  border-radius: 2px;
  background: #1a1a1a;
}

/* ---------- try-it strip ---------- */

.try-strip {
  background: var(--bg-raised);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
.try-board { height: clamp(170px, 26vw, 250px); border: 1px solid var(--line); border-radius: var(--radius); }
.try-controls { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
.try-controls input[type="text"] {
  flex: 1 1 260px;
  background: #000;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font: 500 1rem var(--font-mono);
  padding: 12px 14px;
  text-transform: uppercase;
}
.try-controls input[type="text"]::placeholder { color: var(--ink-faint); text-transform: none; }
.try-controls input[type="text"]:focus { outline: 2px solid var(--amber); border-color: transparent; }
.try-hint { color: var(--ink-faint); font-size: 0.86rem; margin-top: 12px; }
.share-out {
  margin-top: 12px; font-family: var(--font-mono); font-size: 0.82rem;
  color: var(--ink-dim); word-break: break-all;
}
.share-out a { color: var(--amber); }

/* ---------- differentiators ---------- */

.diff {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 44px 0;
}
.diff + .diff { border-top: 1px solid var(--line-soft); }
.diff:nth-child(even) .diff-media { order: 2; }
.diff h3 { color: var(--ink); }
.diff .num {
  font-family: var(--font-mono); color: var(--amber);
  font-size: 0.8rem; letter-spacing: 0.2em;
}
.diff p { color: var(--ink-dim); }
.diff-media { min-width: 0; }
.diff-board {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.d-density-board { height: 240px; }
.d-photo-board { height: 200px; }
.d-sound-board { height: 210px; }
.d-tiling-outer { background: #000; border: 1px solid var(--line); border-radius: var(--radius); padding: 0; overflow: hidden; }
.d-tiling-board { height: 230px; margin: 0 auto; width: 100%; }

.demo-buttons { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }
.demo-buttons button {
  font: 600 0.78rem var(--font-mono);
  letter-spacing: 0.08em;
  background: transparent;
  color: var(--ink-dim);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px 12px;
  cursor: pointer;
  text-transform: uppercase;
}
.demo-buttons button:hover { color: var(--ink); border-color: var(--ink-faint); }
.demo-buttons button[aria-pressed="true"] { color: #000; background: var(--amber); border-color: var(--amber); }

.compare-pair { display: grid; gap: 14px; }
.compare-pair figure { margin: 0; }
.compare-pair .board { height: 120px; border: 1px solid var(--line); border-radius: var(--radius); }
.compare-pair figcaption {
  font: 600 0.72rem var(--font-mono); letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ink-faint); margin-top: 8px;
}
.compare-pair figure:first-child figcaption { color: var(--amber); }

.metric-list { list-style: none; padding: 0; margin: 14px 0 0; color: var(--ink-dim); font-size: 0.95rem; }
.metric-list li { padding: 4px 0 4px 22px; position: relative; }
.metric-list li::before { content: "→"; position: absolute; left: 0; color: var(--amber); }

@media (max-width: 860px) {
  .diff { grid-template-columns: 1fr; gap: 26px; }
  .diff:nth-child(even) .diff-media { order: 0; }
}

/* ---------- channels wall ---------- */

.chan-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 18px;
}
.chan-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.chan-card .board { height: 150px; border-bottom: 1px solid var(--line-soft); }
.chan-card .chan-label {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 10px 14px;
  font: 600 0.78rem var(--font-mono);
  letter-spacing: 0.12em; text-transform: uppercase;
}
.chan-card .chan-label .live { color: var(--good); font-size: 0.68rem; }

/* ---------- use cases ---------- */

.uses {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px;
}
.use-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 18px;
}
.use-card .tag {
  display: inline-block;
  font: 700 0.82rem var(--font-mono);
  letter-spacing: 0.1em;
  background: #000;
  color: var(--amber);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 5px 9px;
  margin-bottom: 12px;
}
.use-card h3 { font-size: 1.05rem; margin-bottom: 6px; }
.use-card p { color: var(--ink-dim); font-size: 0.9rem; margin: 0; }

/* ---------- API section ---------- */

.code-block {
  background: #0d0d0b;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  overflow-x: auto;
  position: relative;
}
.code-block pre {
  margin: 0;
  font: 0.86rem/1.55 var(--font-mono);
  color: var(--ink);
  white-space: pre;
}
.code-block .cm { color: var(--ink-faint); }
.code-block .ca { color: var(--amber); }
.code-block .cg { color: var(--good); }
.copy-btn {
  position: absolute; top: 10px; right: 10px;
  font: 600 0.72rem var(--font-mono);
  background: var(--bg-raised); color: var(--ink-dim);
  border: 1px solid var(--line); border-radius: 6px;
  padding: 5px 10px; cursor: pointer;
}
.copy-btn:hover { color: var(--amber); border-color: var(--amber); }

/* ---------- tables ---------- */

.tbl-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table.cmp {
  border-collapse: collapse;
  width: 100%;
  min-width: 720px;
  font-size: 0.92rem;
}
table.cmp th, table.cmp td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}
table.cmp thead th {
  font: 700 0.78rem var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
  background: var(--bg-raised);
  position: sticky; top: 0;
}
table.cmp thead th.us { color: var(--amber); }
table.cmp tbody tr:last-child td { border-bottom: 0; }
table.cmp td.us { background: color-mix(in srgb, var(--amber) 5%, transparent); color: var(--ink); }
table.cmp td .money { color: var(--ink-dim); font-family: var(--font-mono); font-size: 0.82rem; }
table.cmp td small { color: var(--ink-faint); display: block; }

/* ---------- feature groups (features.html) ---------- */

.fgroup { margin-bottom: 56px; }
.fgroup h2 { margin-bottom: 6px; }
.fgroup .fgroup-sub { color: var(--ink-dim); margin: 0 0 22px; }
.flist {
  list-style: none; padding: 0; margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 12px;
}
.flist li {
  display: flex; gap: 12px; align-items: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 14px 16px;
}
.flist li .tick, .flist li .road { flex: 0 0 auto; margin-top: 2px; }
.flist li strong { display: block; font-size: 0.98rem; }
.flist li p { margin: 2px 0 0; color: var(--ink-dim); font-size: 0.88rem; }
.road {
  font: 700 0.62rem var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--bg);
  background: var(--ink-dim);
  border-radius: 4px;
  padding: 2px 6px;
  text-transform: uppercase;
}

.feat-hero-board { height: clamp(180px, 30vw, 260px); }

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

footer.site {
  border-top: 1px solid var(--line-soft);
  padding: 48px 0 40px;
  color: var(--ink-dim);
  font-size: 0.92rem;
}
.foot-grid { display: flex; gap: 48px; flex-wrap: wrap; justify-content: space-between; }
.foot-col h4 {
  font: 700 0.75rem var(--font-mono);
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--ink-faint); margin: 0 0 10px;
}
.foot-col ul { list-style: none; margin: 0; padding: 0; }
.foot-col li { margin: 6px 0; }
.foot-col a { color: var(--ink-dim); }
.foot-col a:hover { color: var(--amber); }
.foot-brand { max-width: 320px; }
.foot-brand .logo { font-size: 1.15rem; }
.foot-legal { margin-top: 34px; color: var(--ink-faint); font-size: 0.82rem; }

/* ---------- free tool pages (clock / countdown) ---------- */

.tool-page { height: 100dvh; display: flex; flex-direction: column; background: #000; }
.tool-board { flex: 1 1 auto; min-height: 0; }
.tool-top {
  position: fixed; top: 0; left: 0; right: 0; z-index: 20;
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px;
  pointer-events: none;
}
.tool-top > * { pointer-events: auto; }
.tool-cta {
  font: 600 0.8rem var(--font-mono);
  background: rgba(10, 10, 9, 0.8);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 14px;
  color: var(--ink-dim);
}
.tool-cta:hover { color: var(--amber); border-color: var(--amber); text-decoration: none; }
.tool-top .logo {
  background: rgba(10, 10, 9, 0.8);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 1rem;
}

.tool-panel {
  position: fixed; left: 50%; bottom: 18px; transform: translateX(-50%);
  z-index: 20;
  background: rgba(14, 13, 12, 0.94);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
  justify-content: center;
  max-width: min(94vw, 720px);
  transition: opacity 0.4s ease;
}
.tool-panel.faded { opacity: 0; pointer-events: none; }
.tool-panel label {
  font: 600 0.72rem var(--font-mono);
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ink-dim);
  display: flex; align-items: center; gap: 6px;
  white-space: nowrap;
}
.tool-panel input[type="text"], .tool-panel input[type="datetime-local"], .tool-panel select {
  background: #000; color: var(--ink);
  border: 1px solid var(--line); border-radius: 6px;
  font: 500 0.86rem var(--font-mono);
  padding: 7px 9px;
  color-scheme: dark;
}
.tool-panel input[type="checkbox"] { accent-color: var(--amber); }
.tool-panel .btn { padding: 8px 13px; font-size: 0.82rem; }

/* generic small toast */
.toast {
  position: fixed; left: 50%; bottom: 84px; transform: translateX(-50%);
  background: var(--amber); color: #000;
  font: 700 0.84rem var(--font-ui);
  padding: 9px 16px; border-radius: 8px;
  z-index: 60;
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}
.toast.show { opacity: 1; }

@media (max-width: 640px) {
  section { padding: 52px 0; }
  .hero { padding-top: 36px; }
  .foot-grid { gap: 26px; }
}