/* ============================================================================
   SpatiumDDI site styles
   ----------------------------------------------------------------------------
   Replaces jekyll-theme-minimal. That theme put a fixed 270px sidebar beside a
   500px content column, which is why reference docs rendered into a narrow
   strip with empty screen next to it. This is a single-column layout with a
   top nav instead — no side-by-side at any width.

   Palette is taken from assets/logo.svg so the site and the mark agree:
     slate  #0f172a / #1e293b      teal  #134e4a / #0d9488 / #2dd4bf

   Plain CSS, not SCSS, deliberately: it is copied verbatim by Jekyll, so there
   is no Sass compile step that can fail a Pages build.
   ========================================================================= */

:root {
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --bg-code: #f1f5f9;
  --fg: #0f172a;
  --fg-muted: #475569;
  --fg-faint: #64748b;
  --border: #e2e8f0;
  --accent: #0d9488;
  --accent-hover: #0f766e;
  --accent-bright: #2dd4bf;
  --brand-dark: #0f172a;
  --brand-dark-2: #1e293b;
  --shadow: 0 1px 2px rgb(15 23 42 / 6%), 0 8px 24px -12px rgb(15 23 42 / 18%);
  --radius: 12px;
  --page: 78rem; /* outer container */
}

/* Dark palette. Declared twice on purpose — plain CSS has no way to share one
   block between a media query and an attribute selector:
     1. the media query is the default for anyone who has not chosen, and is
        suppressed once they explicitly pick light;
     2. the attribute selector is the explicit choice, set by the toggle and
        persisted in localStorage. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1220;
    --bg-soft: #111c2e;
    --bg-code: #16223a;
    --fg: #e8eefc;
    --fg-muted: #a3b3cc;
    --fg-faint: #8497b5;
    --border: #22304a;
    --accent: #2dd4bf;
    --accent-hover: #5eead4;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 8px 24px -12px rgb(0 0 0 / 60%);
  }
}

:root[data-theme="dark"] {
  --bg: #0b1220;
  --bg-soft: #111c2e;
  --bg-code: #16223a;
  --fg: #e8eefc;
  --fg-muted: #a3b3cc;
  --fg-faint: #8497b5;
  --border: #22304a;
  --accent: #2dd4bf;
  --accent-hover: #5eead4;
  --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 8px 24px -12px rgb(0 0 0 / 60%);
}

/* The toggle swaps icons rather than duplicating markup visibility logic. */
.theme-toggle .icon-dark {
  display: none;
}
:root[data-theme="dark"] .theme-toggle .icon-dark,
.theme-toggle .icon-light {
  display: block;
}
:root[data-theme="dark"] .theme-toggle .icon-light {
  display: none;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-light {
    display: none;
  }
  :root:not([data-theme="light"]) .theme-toggle .icon-dark {
    display: block;
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  /* The nav is sticky and 62px tall, so an un-offset anchor jump parks the
     target underneath it. Applies to #features / #install and to every doc
     heading deep-link. */
  scroll-padding-top: 78px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

code,
pre,
kbd {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
}

/* ─── Top navigation ─────────────────────────────────────────────────────── */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  /* Opaque fallback first: where color-mix() is unsupported the declaration
     below is dropped, and without this the nav would be transparent with page
     text scrolling illegibly beneath it. */
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--page);
  margin: 0 auto;
  padding: 0 24px;
  height: 62px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--fg);
}
.nav-brand:hover {
  text-decoration: none;
  color: var(--fg);
}
.nav-brand img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  display: block;
}
.nav-brand .ddi {
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.14em;
  font-size: 0.78em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-left: auto;
  font-size: 0.94rem;
}
.nav-links a {
  color: var(--fg-muted);
  white-space: nowrap;
}
.nav-links a:hover {
  color: var(--accent);
  text-decoration: none;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--fg) !important;
  background: var(--bg-soft);
}
.nav-cta:hover {
  border-color: var(--accent);
  color: var(--accent) !important;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-soft);
  color: var(--fg-muted);
  cursor: pointer;
  flex: none;
}
.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.theme-toggle svg {
  display: block;
}

@media (max-width: 820px) {
  .nav-links .hide-sm {
    display: none;
  }
}

/* ─── Utilities ──────────────────────────────────────────────────────────── */

.center {
  text-align: center;
}
.center-block {
  text-align: center;
  margin-top: 32px;
}
.muted {
  color: var(--fg-muted);
}

/* ─── Hero (landing) ─────────────────────────────────────────────────────── */

.hero {
  background:
    radial-gradient(
      1200px 500px at 50% -180px,
      rgb(45 212 191 / 22%),
      transparent 70%
    ),
    linear-gradient(180deg, var(--brand-dark), var(--brand-dark-2));
  color: #f1f5f9;
  border-bottom: 1px solid var(--border);
  padding: 92px 24px 84px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::after {
  /* faint grid, evoking subnets without being loud about it */
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(
      rgb(148 163 184 / 7%) 1px,
      transparent 1px
    ),
    linear-gradient(90deg, rgb(148 163 184 / 7%) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(700px 340px at 50% 30%, #000, transparent 75%);
  pointer-events: none;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 13px;
  border-radius: 999px;
  border: 1px solid rgb(45 212 191 / 35%);
  background: rgb(45 212 191 / 10%);
  color: var(--accent-bright);
  font-size: 0.82rem;
  font-weight: 500;
  margin-bottom: 26px;
}

.hero h1 {
  margin: 0 0 18px;
  font-size: clamp(2.2rem, 5.2vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.033em;
  font-weight: 800;
  color: #fff;
  border: 0;
}

.hero h1 .accent {
  background: linear-gradient(96deg, var(--accent-bright), #5eead4);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p.lede {
  margin: 0 auto 34px;
  max-width: 40rem;
  font-size: clamp(1.02rem, 1.9vw, 1.2rem);
  color: #cbd5e1;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.98rem;
  border: 1px solid transparent;
  transition: transform 0.12s ease, background 0.12s ease,
    border-color 0.12s ease;
}
.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}
.btn-primary {
  background: var(--accent);
  color: #04201d !important;
}
.btn-primary:hover {
  background: var(--accent-bright);
}
.btn-ghost {
  border-color: rgb(203 213 225 / 28%);
  color: #e2e8f0 !important;
  background: rgb(255 255 255 / 4%);
}
.btn-ghost:hover {
  border-color: var(--accent-bright);
  color: #fff !important;
}

.hero-meta {
  margin-top: 30px;
  font-size: 0.85rem;
  color: #94a3b8;
}
.hero-meta code {
  background: rgb(255 255 255 / 8%);
  padding: 2px 7px;
  border-radius: 5px;
  color: #cbd5e1;
}

/* ─── Sections ───────────────────────────────────────────────────────────── */

.section {
  max-width: var(--page);
  margin: 0 auto;
  padding: 76px 24px;
}
.section-alt {
  background: var(--bg-soft);
  border-block: 1px solid var(--border);
  max-width: none;
}
.section-alt > .section-inner {
  max-width: var(--page);
  margin: 0 auto;
}

.section-head {
  text-align: center;
  max-width: 42rem;
  margin: 0 auto 46px;
}
.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  letter-spacing: -0.025em;
  margin: 0 0 12px;
  border: 0;
  padding: 0;
}
.section-head p {
  color: var(--fg-muted);
  margin: 0;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 10px;
}

/* ─── Cards ──────────────────────────────────────────────────────────────── */

.grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 290px), 1fr));
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.14s ease, transform 0.14s ease,
    box-shadow 0.14s ease;
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.card h3 {
  margin: 0 0 8px;
  font-size: 1.06rem;
  letter-spacing: -0.015em;
  border: 0;
  padding: 0;
}
.card p {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.94rem;
}
.card .ico {
  font-size: 1.5rem;
  line-height: 1;
  display: block;
  margin-bottom: 14px;
}
a.card,
a.card:hover {
  text-decoration: none;
  color: inherit;
  display: block;
}

/* ─── Split (quick start) ────────────────────────────────────────────────── */

.split {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr));
  align-items: start;
}

.panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg);
}
.panel-head {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}
.panel-head h3 {
  margin: 0;
  font-size: 1rem;
  border: 0;
  padding: 0;
}
.panel-head p {
  margin: 4px 0 0;
  font-size: 0.86rem;
  color: var(--fg-faint);
}
.panel pre {
  margin: 0;
  border: 0;
  border-radius: 0;
  background: var(--bg-code);
}

/* ─── Screenshots ────────────────────────────────────────────────────────── */

.shots {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr));
}
.shot {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-soft);
}
.shot img {
  display: block;
  width: 100%;
  height: auto;
}
.shot-link {
  display: block;
  cursor: zoom-in;
  position: relative;
}
.shot-link::after {
  /* Affordance — the screenshots previously looked interactive but were not.
     Kept subtle and revealed on hover rather than always-on. */
  content: "⤢";
  position: absolute;
  top: 10px;
  right: 10px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: rgb(15 23 42 / 72%);
  color: #fff;
  font-size: 0.95rem;
  opacity: 0;
  transition: opacity 0.14s ease;
}
.shot-link:hover::after,
.shot-link:focus-visible::after {
  opacity: 1;
}

.doc-body img.zoomable {
  cursor: zoom-in;
}

/* ─── Lightbox ───────────────────────────────────────────────────────────── */

.lightbox {
  border: 0;
  padding: 0;
  background: transparent;
  max-width: min(94vw, 1500px);
  max-height: 94vh;
  overflow: visible;
}
.lightbox::backdrop {
  background: rgb(2 6 23 / 82%);
  backdrop-filter: blur(3px);
}
.lightbox img {
  display: block;
  max-width: 100%;
  max-height: 86vh;
  width: auto;
  height: auto;
  border-radius: 10px;
  background: var(--bg);
  box-shadow: 0 24px 70px -18px rgb(0 0 0 / 70%);
}
.lightbox-caption {
  margin: 12px 2px 0;
  color: #cbd5e1;
  font-size: 0.9rem;
  text-align: center;
}
.lightbox-close {
  position: absolute;
  top: -14px;
  right: -14px;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid rgb(148 163 184 / 45%);
  background: #0f172a;
  color: #e2e8f0;
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
}
.lightbox-close:hover {
  border-color: var(--accent-bright);
  color: var(--accent-bright);
}

@media (max-width: 640px) {
  .lightbox-close {
    top: 6px;
    right: 6px;
  }
}
.shot figcaption {
  padding: 11px 16px;
  font-size: 0.86rem;
  color: var(--fg-muted);
  border-top: 1px solid var(--border);
}

/* ─── Docs page ──────────────────────────────────────────────────────────── */

.doc {
  max-width: var(--page);
  margin: 0 auto;
  padding: 44px 24px 90px;
}

.doc-crumb {
  font-size: 0.86rem;
  color: var(--fg-faint);
  margin-bottom: 26px;
}
.doc-crumb a {
  color: var(--fg-muted);
}

.doc-body {
  /* One column, one right edge.
     This previously capped every direct child at --measure (46rem) while
     exempting headings, rules, tables and code at 62rem. The result was two
     competing right edges down the page: h2 underlines and <hr> ran a long
     way past the paragraphs they belonged to, and each table or code block
     visibly jutted out past the prose above it. A single width for everything
     is what makes the page read as aligned. Content too wide to fit scrolls
     inside its own box (see table/pre below) rather than widening the column. */
  max-width: 58rem;
}

.doc-body h1 {
  font-size: clamp(1.9rem, 3.4vw, 2.5rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0 0 8px;
}
.doc-body h2 {
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  margin: 2.3em 0 0.7em;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--border);
}
.doc-body h3 {
  font-size: 1.16rem;
  margin: 1.9em 0 0.6em;
}
.doc-body h4 {
  font-size: 1rem;
  margin: 1.6em 0 0.5em;
  color: var(--fg-muted);
}

.doc-body img,
.doc-body svg {
  max-width: 100%;
  height: auto;
}

.doc-body pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.5;
}
.doc-body :not(pre) > code {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.12em 0.38em;
  font-size: 0.88em;
}

.doc-body table {
  display: block;
  width: max-content;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 1.2em 0;
}
.doc-body th,
.doc-body td {
  border: 1px solid var(--border);
  padding: 8px 13px;
  text-align: left;
  vertical-align: top;
}
.doc-body th {
  background: var(--bg-soft);
  font-weight: 600;
}

.doc-body blockquote {
  margin: 1.3em 0;
  padding: 2px 18px;
  border-left: 3px solid var(--accent);
  background: var(--bg-soft);
  border-radius: 0 8px 8px 0;
  color: var(--fg-muted);
}
.doc-body blockquote > :first-child {
  margin-top: 0.7em;
}
.doc-body blockquote > :last-child {
  margin-bottom: 0.7em;
}

.doc-body hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2.4em 0;
}

.doc-body ul,
.doc-body ol {
  padding-left: 1.35em;
}
.doc-body li + li {
  margin-top: 0.3em;
}

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

.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 46px 24px;
  font-size: 0.9rem;
  color: var(--fg-muted);
}
.footer-inner {
  max-width: var(--page);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 18px 34px;
  align-items: center;
}
.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  /* margin-left:auto pushes the links right on one line, but once the footer
     wraps that auto margin still applies and strands them mid-row. Pairing it
     with a flexible basis keeps them left-aligned under the brand instead. */
  margin-left: auto;
}
@media (max-width: 640px) {
  .footer-links {
    margin-left: 0;
  }
}
.ddi-mark {
  color: var(--accent);
}
.footer a {
  color: var(--fg-muted);
}
.footer a:hover {
  color: var(--accent);
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }
  .hero {
    padding: 66px 20px 60px;
  }
  .section {
    padding: 56px 20px;
  }
  .doc {
    padding: 28px 20px 70px;
  }
}