/* SpadeIDE site — tokens from SpadeTheme.swift (Night + Day).
   Follows the system appearance via prefers-color-scheme.
   No build step, no external fonts, no CDN. Edit and reload. */

:root {
  color-scheme: dark;
  --bg: #0a0e14;
  --surface: #121821;
  --surface2: #1a2330;
  --border: #2a3544;
  --text: #e8eef6;
  --text-soft: #9aa8b8;
  --muted: #8b9aab;
  --accent: #e0a01a;
  --accent-hover: #eeb82e;
  --accent-fg: #0a0e14;
  --green: #2ea86a;
  --blue: #6ec8ff;
  --danger: #ef5a52;
  --pre-bg: #070b11;
  --pre-fg: #dbe6f2;
  --pre-comment: #7c8b9c;
  --header-bg: rgba(10, 14, 20, 0.88);
  --shot-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
  --mark-filter: none;
  --glow: rgba(224, 160, 26, 0.2);
  --stripe-a: #121821;
  --stripe-b: #141b25;
  --row-hover: rgba(255, 255, 255, 0.02);

  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --radius: 10px;
  --maxw: 1120px;
}

@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg: #e2e8f0;
    --surface: #f1f4f8;
    --surface2: #d4dce7;
    --border: #c2ccd8;
    --text: #121821;
    --text-soft: #3d4f5f;
    --muted: #5c6d7e;
    --accent: #b8760e;
    --accent-hover: #a3680c;
    --accent-fg: #ffffff;
    --green: #1a6b42;
    --blue: #0a628a;
    --danger: #c62828;
    --pre-bg: #ffffff;
    --pre-fg: #121821;
    --pre-comment: #5c6d7e;
    --header-bg: rgba(226, 232, 240, 0.9);
    --shot-shadow: 0 24px 60px rgba(20, 40, 70, 0.14);
    --mark-filter: brightness(0); /* white SpadeMark → black */
    --glow: rgba(184, 118, 14, 0.18);
    --stripe-a: #e8eef4;
    --stripe-b: #dde5ee;
    --row-hover: rgba(18, 24, 33, 0.03);
  }
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  /* Keep hash targets clear of the sticky site header. */
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  background:
    radial-gradient(900px 480px at 50% -8%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 55%),
    radial-gradient(700px 400px at 100% 20%, color-mix(in srgb, var(--blue) 6%, transparent), transparent 50%),
    var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

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

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 820px; }

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

header.site {
  position: sticky; top: 0; z-index: 50;
  background: var(--header-bg);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}
header.site .wrap {
  display: flex; align-items: center; gap: 28px;
  height: 60px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 650; font-size: 17px; color: var(--text);
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; color: var(--text); }
.brand .mark {
  display: block;
  width: 26px; height: 26px; flex-shrink: 0;
  object-fit: contain;
  filter: var(--mark-filter);
}
nav.main { display: flex; gap: 22px; margin-left: auto; align-items: center; }
nav.main a { color: var(--text-soft); font-size: 15px; }
nav.main a:hover { color: var(--text); text-decoration: none; }
nav.main a.current { color: var(--text); }

/* ---------- buttons ---------- */

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 20px; border-radius: 8px;
  font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: var(--accent-fg); }
.btn-primary:hover { background: var(--accent-hover); color: var(--accent-fg); }
nav.main a.btn-primary { color: var(--accent-fg); }
nav.main a.btn-primary:hover { color: var(--accent-fg); }
.btn-ghost { border-color: var(--border); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--muted); color: var(--text); }
.btn-disabled,
.btn[aria-disabled="true"] {
  background: color-mix(in srgb, var(--border) 55%, transparent);
  color: var(--muted);
  border-color: var(--border);
  cursor: not-allowed;
  pointer-events: none;
}
.tag-soon {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  vertical-align: middle;
  white-space: nowrap;
}

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

.hero { padding: 72px 0 56px; text-align: center; }
.hero .brand-hero {
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  margin: 0 0 20px; color: var(--text);
  font-size: clamp(28px, 4vw, 40px); font-weight: 700;
  letter-spacing: -0.03em;
}
.hero .brand-glow {
  width: 96px; height: 96px; border-radius: 50%;
  display: grid; place-items: center;
  background: radial-gradient(circle, var(--glow) 0%, transparent 68%);
}
.hero .brand-glow .mark {
  width: 52px; height: 52px;
  filter: var(--mark-filter);
}
.hero h1 {
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1.15; margin: 0 0 16px;
  letter-spacing: -0.025em; font-weight: 650;
  color: var(--text);
}
.hero h1 .amber { color: var(--accent); }
.hero .lede {
  font-size: clamp(16px, 1.8vw, 19px);
  color: var(--text-soft); max-width: 640px; margin: 0 auto 28px;
}
.hero .cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero .sub { margin-top: 14px; font-size: 14px; color: var(--muted); }

.shot {
  margin: 48px auto 0;
  border: none;
  border-radius: 0;
  overflow: visible;
  background: transparent;
  box-shadow: none;
}
.shot img, .shot picture {
  width: 100%;
  display: block;
  border-radius: 0;
}
/* drop-shadow must be on <img> so it follows alpha — not on <picture> */
.shot > img,
.shot > picture > img {
  filter: drop-shadow(0 18px 44px rgba(0, 0, 0, 0.45));
}
@media (prefers-color-scheme: light) {
  .shot > img,
  .shot > picture > img {
    filter: drop-shadow(0 16px 36px rgba(20, 24, 32, 0.22));
  }
}
/* Mac menu-bar popover — keep near native width, not full column */
.shot.shot-popover {
  max-width: 280px;
  margin-left: auto;
  margin-right: auto;
}
.shot.shot-popover > img,
.shot.shot-popover > picture > img {
  border-radius: 14px;
  filter: drop-shadow(0 14px 32px rgba(0, 0, 0, 0.55));
}
@media (prefers-color-scheme: light) {
  .shot.shot-popover > img,
  .shot.shot-popover > picture > img {
    filter: drop-shadow(0 12px 26px rgba(20, 24, 32, 0.2));
  }
}
.shot figcaption {
  margin-top: 14px;
  padding: 0 4px;
  font-size: 13px;
  color: var(--muted);
  border: none;
  background: transparent;
}

/* placeholder shown until a real screenshot is dropped in */
.shot-missing {
  aspect-ratio: 16 / 10; display: grid; place-items: center;
  color: var(--muted); font-family: var(--mono); font-size: 13px;
  border-radius: 14px; overflow: hidden;
  border: 1px solid var(--border);
  background:
    repeating-linear-gradient(45deg, var(--stripe-a) 0 12px, var(--stripe-b) 12px 24px);
  text-align: center; padding: 24px; line-height: 1.5;
}

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

section { padding: 72px 0; }
section.tight { padding: 48px 0; }
section + section { border-top: 1px solid var(--border); }

h2.section {
  font-size: clamp(26px, 3.4vw, 36px); letter-spacing: -0.02em;
  margin: 0 0 12px; font-weight: 700;
}
p.section-lede {
  color: var(--text-soft); font-size: 17px; margin: 0 0 40px; max-width: 700px;
}
.center { text-align: center; }
.center p.section-lede { margin-left: auto; margin-right: auto; }

/* ---------- feature grid ---------- */

.grid { display: grid; gap: 20px; }
.grid.c3 { grid-template-columns: repeat(3, 1fr); }
.grid.c2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
}
.card h3 {
  margin: 0 0 8px; font-size: 18px; font-weight: 650;
  letter-spacing: -0.01em;
}
.card p { margin: 0; color: var(--text-soft); font-size: 15px; }
.card .ico {
  display: block;
  width: 26px;
  height: 26px;
  margin: 0 0 14px;
  color: var(--accent);
}
.card .ico svg {
  display: block;
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- steps ---------- */

.steps { counter-reset: step; display: grid; gap: 18px; }
.step {
  display: grid; grid-template-columns: 38px 1fr; gap: 16px;
  align-items: start;
}
.step .n {
  counter-increment: step; width: 38px; height: 38px; border-radius: 50%;
  background: var(--accent); color: var(--accent-fg);
  display: grid; place-items: center; font-weight: 700;
}
.step .n::before { content: counter(step); }
.step h3 { margin: 6px 0 6px; font-size: 18px; }
.step p { margin: 0; color: var(--text-soft); }

/* ---------- code ---------- */

pre {
  background: var(--pre-bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px 18px;
  overflow-x: auto; font-family: var(--mono); font-size: 13.5px;
  line-height: 1.6; margin: 18px 0; color: var(--pre-fg);
}
code { font-family: var(--mono); font-size: 0.92em; }
p code, li code, td code {
  background: var(--surface2); padding: 2px 6px; border-radius: 5px;
  color: var(--accent); border: 1px solid var(--border);
}
pre code { background: none; padding: 0; border: 0; color: inherit; }
.c { color: var(--pre-comment); }

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

table {
  width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 15px;
  display: block; overflow-x: auto;
}
@media (min-width: 720px) { table { display: table; } }
th, td {
  text-align: left; padding: 10px 14px;
  border-bottom: 1px solid var(--border); vertical-align: top;
}
th { color: var(--text); font-weight: 650; background: var(--surface); }
td { color: var(--text-soft); }
tbody tr:hover td { background: var(--row-hover); }

/* ---------- callouts ---------- */

.note {
  border-left: 3px solid var(--accent); background: var(--surface);
  padding: 16px 20px; border-radius: 0 var(--radius) var(--radius) 0;
  margin: 22px 0; font-size: 15px; color: var(--text-soft);
}
.note strong { color: var(--text); }
.note.warn { border-left-color: var(--danger); }
.note.good { border-left-color: var(--green); }

/* ---------- docs layout ---------- */

.docs { display: grid; grid-template-columns: 236px 1fr; gap: 48px; padding: 44px 0 90px; }
.docs aside {
  position: sticky; top: 84px; align-self: start;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  padding-right: 4px;
}
.docs aside h4 {
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--muted); margin: 22px 0 10px;
}
.docs aside h4:first-child { margin-top: 0; }
.docs aside a {
  display: block; padding: 6px 12px; border-radius: 6px;
  color: var(--text-soft); font-size: 14.5px;
}
.docs aside a:hover { background: var(--surface); color: var(--text); text-decoration: none; }
.docs aside a.current { background: var(--surface2); color: var(--accent); }
.docs aside .aside-sub {
  margin: 2px 0 6px 12px;
  padding: 2px 0 6px 10px;
  border-left: 1px solid var(--border);
}
.docs aside .aside-sub[hidden] { display: none; }
.docs aside .aside-sub a {
  font-size: 13.5px;
  padding: 4px 10px;
  color: var(--muted);
}
.docs aside .aside-sub a:hover { color: var(--text); }
.docs aside .aside-sub a.current {
  color: var(--accent);
  background: var(--surface2);
}

/* Enough room that every heading — including the last — can reach the spy line. */
.docs main { padding-bottom: calc(100vh - 12rem); }
.docs main h1 {
  font-size: clamp(28px, 4vw, 40px); margin: 0 0 12px; letter-spacing: -0.02em;
}
.docs main > p:first-of-type { font-size: 17px; color: var(--text-soft); }
.docs main h2 {
  font-size: 24px; margin: 44px 0 12px; padding-top: 12px;
  border-top: 1px solid var(--border); letter-spacing: -0.01em;
}
.docs main h3 { font-size: 18px; margin: 28px 0 8px; }
.docs main h4 { font-size: 15.5px; margin: 22px 0 6px; color: var(--text); font-weight: 650; }
.docs main ul, .docs main ol { color: var(--text-soft); padding-left: 22px; }
.docs main li { margin: 6px 0; }
.docs main p { color: var(--text-soft); }
.docs main strong { color: var(--text); }

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

footer.site {
  border-top: 1px solid var(--border); padding: 44px 0 60px;
  color: var(--muted); font-size: 14px;
}
footer.site .cols { display: flex; gap: 60px; flex-wrap: wrap; margin-bottom: 28px; }
footer.site h5 {
  color: var(--text); font-size: 13px; margin: 0 0 10px;
  text-transform: uppercase; letter-spacing: 0.07em;
}
footer.site a { display: block; color: var(--text-soft); padding: 3px 0; }

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

@media (max-width: 900px) {
  .grid.c3 { grid-template-columns: repeat(2, 1fr); }
  .docs { grid-template-columns: 1fr; gap: 24px; }
  .docs aside {
    position: static; border-bottom: 1px solid var(--border); padding-bottom: 16px;
  }
}
@media (max-width: 620px) {
  .grid.c3, .grid.c2 { grid-template-columns: 1fr; }
  nav.main { gap: 14px; }
  nav.main a.hide-sm { display: none; }
  .hero { padding: 56px 0 40px; }
  section { padding: 52px 0; }
}