/* ═══════════════════════════════════════════════════════════════════════════
   StegoPixel — Site Stylesheet
   Layout + components. All colour/scale values come from tokens.css, which
   mirrors the desktop app's Design System. Nothing here hardcodes a brand
   colour, so light/dark switching is automatic.
   ═══════════════════════════════════════════════════════════════════════════ */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-weight: var(--fw-regular);
  color: var(--m3-text-secondary);
  background: var(--m3-surface);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  color: var(--m3-text-primary);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  text-wrap: balance;
}
p { margin: 0; text-wrap: pretty; }
ul, ol { margin: 0; padding: 0; }
img, svg, video { max-width: 100%; display: block; }
img { height: auto; }
button { font: inherit; color: inherit; }
a { color: var(--m3-primary); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
strong, b { color: var(--m3-text-primary); font-weight: var(--fw-semibold); }
em { font-style: italic; }
hr { border: 0; border-top: 1px solid var(--m3-outline-variant); margin: var(--sp-7) 0; }

code, kbd, samp, pre { font-family: var(--font-mono); }
code {
  font-size: 0.88em;
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 0.12em 0.42em;
  border-radius: 6px;
  word-break: break-word;
}
pre {
  margin: 0;
  background: var(--code-bg);
  border: 1px solid var(--m3-outline-variant);
  border-radius: var(--r-data);
  padding: var(--sp-4);
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--m3-text-primary);
}
pre code { background: none; padding: 0; color: inherit; font-size: 1em; }

:focus-visible {
  outline: 2px solid var(--m3-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ── Accessibility helpers ────────────────────────────────────────────────── */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  transform: translate(-50%, -140%);
  z-index: 200;
  background: var(--m3-primary);
  color: var(--m3-on-primary);
  padding: 10px 18px;
  border-radius: 0 0 var(--r-input) var(--r-input);
  font-weight: var(--fw-semibold);
  font-size: 0.9rem;
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus { transform: translate(-50%, 0); text-decoration: none; }

/* ── Layout ───────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--sp-6);
}
.container-narrow { max-width: var(--max-w-narrow); }

.icon {
  width: 1.15em;
  height: 1.15em;
  flex: none;
  vertical-align: -0.18em;
}

/* ── Header ───────────────────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--m3-surface-overlay);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--m3-outline-variant);
  background: var(--m3-surface-overlay-strong);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
  font-size: 1.12rem;
  font-weight: var(--fw-black);
  letter-spacing: var(--ls-tight);
  color: var(--m3-text-primary);
}
.brand:hover { text-decoration: none; }
.brand img, .brand svg { border-radius: 9px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
  list-style: none;
}
.nav-links a:not(.btn) {
  display: block;
  padding: 8px 13px;
  border-radius: var(--r-input);
  color: var(--m3-text-secondary);
  font-size: 0.92rem;
  font-weight: var(--fw-medium);
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.nav-links a:not(.btn):hover {
  color: var(--m3-text-primary);
  background: var(--hover-wash);
  text-decoration: none;
}
/* Active page — the app's "selected sidebar pill" treatment (SKILL §2.1) */
.nav-links a[aria-current="page"] {
  color: var(--m3-primary);
  background: var(--m3-secondary-container);
  border-radius: var(--r-pill);
}
.nav-cta-group { display: flex; gap: var(--sp-2); margin-left: 10px; }
/* The theme toggle sits after that CTA. It is not another nav link, so it gets
   deliberate clearance instead of the 2px link gap. */
.nav-links .theme-toggle { margin-left: var(--sp-3); }

.nav-toggle {
  display: none;
  margin-left: auto;
  border: 1px solid var(--m3-outline);
  background: var(--m3-surface-container);
  color: var(--m3-text-primary);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--r-input);
}
.nav-toggle .icon { width: 21px; height: 21px; }
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  flex: none;
  border-radius: 50%;
  border: 1px solid var(--m3-outline);
  background: var(--m3-surface-container);
  color: var(--m3-text-secondary);
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.theme-toggle:hover { color: var(--m3-primary); border-color: var(--m3-primary); transform: translateY(-1px); }
.theme-toggle .icon { width: 18px; height: 18px; }
.theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: var(--r-input);
  font-size: 0.94rem;
  font-weight: var(--fw-semibold);
  cursor: pointer;
  text-align: center;
  white-space: nowrap;
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur) var(--ease),
              background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--m3-primary);
  color: var(--m3-on-primary);
  box-shadow: var(--elev-1), 0 4px 18px color-mix(in srgb, var(--m3-primary) 32%, transparent);
}
.btn-primary:hover { box-shadow: var(--elev-2), 0 8px 26px color-mix(in srgb, var(--m3-primary) 42%, transparent); }

.btn-secondary {
  background: var(--m3-surface-container);
  color: var(--m3-text-primary);
  border-color: var(--m3-outline);
}
.btn-secondary:hover { border-color: var(--m3-primary); color: var(--m3-primary); }

.btn-ghost { background: transparent; color: var(--m3-text-secondary); border-color: var(--m3-outline); }
.btn-ghost:hover { color: var(--m3-text-primary); border-color: var(--m3-primary); }

.btn-sm { padding: 8px 14px; font-size: 0.875rem; border-radius: var(--r-data); }
.btn-lg { padding: 14px 26px; font-size: 1.01rem; border-radius: 13px; }
.btn-block { width: 100%; }

/* The app's GlassPill (SKILL §6.3.2) */
.btn-pill { border-radius: var(--r-glass-pill); padding: 10px 22px; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: 0.55; cursor: not-allowed; transform: none !important; }

/* ── Badges & chips ───────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  margin: 0 0 var(--sp-5);
  border: 1px solid var(--m3-outline);
  border-radius: var(--r-full);
  background: var(--m3-surface-container);
  color: var(--m3-text-secondary);
  font-size: 0.82rem;
  font-weight: var(--fw-semibold);
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: var(--r-full);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid var(--m3-outline);
  background: var(--m3-surface-container);
  color: var(--m3-text-secondary);
  white-space: nowrap;
}
.chip-primary { color: var(--m3-primary); border-color: color-mix(in srgb, var(--m3-primary) 38%, transparent); background: color-mix(in srgb, var(--m3-primary) 12%, transparent); }
.chip-success { color: var(--m3-success); border-color: color-mix(in srgb, var(--m3-success) 38%, transparent); background: color-mix(in srgb, var(--m3-success) 12%, transparent); }
.chip-warning { color: var(--m3-warning); border-color: color-mix(in srgb, var(--m3-warning) 40%, transparent); background: color-mix(in srgb, var(--m3-warning) 14%, transparent); }
.chip-danger  { color: var(--m3-error); border-color: color-mix(in srgb, var(--m3-error) 38%, transparent); background: color-mix(in srgb, var(--m3-error) 12%, transparent); }
.chip-violet  { color: var(--glow-violet); border-color: color-mix(in srgb, var(--glow-violet) 40%, transparent); background: color-mix(in srgb, var(--glow-violet) 13%, transparent); }

/* Verdict badges — the app's theme-independent semantic tokens (SKILL §5.1).
   Identical in dark and light on purpose: a verdict must read the same way in
   both, and all four carry white text at WCAG AA or better. */
.verdict {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 13px;
  border-radius: var(--r-full);
  color: #fff;
  font-size: 0.8rem;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.verdict-positive { background: var(--verdict-positive); }
.verdict-caution  { background: var(--verdict-caution); }
.verdict-negative { background: var(--verdict-negative); }
.verdict-neutral  { background: var(--verdict-neutral); }

.chip-row { display: flex; flex-wrap: wrap; gap: 7px; }

/* The app's data-title pattern: uppercase + tracked caption label (SKILL §4.2) */
.label {
  display: block;
  font-size: var(--fs-caption);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--m3-text-secondary);
  margin-bottom: 4px;
}

.pulse-dot {
  width: 8px; height: 8px;
  flex: none;
  border-radius: 50%;
  background: var(--m3-warning);
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 color-mix(in srgb, var(--m3-warning) 55%, transparent); }
  70%  { box-shadow: 0 0 0 9px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

/* ── Page hero (home) ─────────────────────────────────────────────────────── */
.hero { position: relative; padding: var(--sp-11) 0 var(--sp-10); overflow: hidden; }
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(660px 340px at 16% 0%, var(--hero-glow-a), transparent 66%),
    radial-gradient(560px 320px at 86% 10%, var(--hero-glow-b), transparent 66%);
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: var(--sp-9);
  align-items: center;
}
.hero h1 { font-size: var(--fs-display); font-weight: var(--fw-black); margin-bottom: var(--sp-5); }
.hero h1 em { font-style: normal; color: var(--m3-primary); }
.lead { max-width: 560px; font-size: var(--fs-lead); margin-bottom: var(--sp-7); }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--sp-3); margin-bottom: var(--sp-6); }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  list-style: none;
  font-size: 0.88rem;
  color: var(--m3-text-secondary);
}
.hero-meta li { display: flex; align-items: center; gap: 8px; }
.hero-meta .icon { color: var(--m3-success); }

/* ── Page hero (subpages) ─────────────────────────────────────────────────── */
.page-hero {
  position: relative;
  padding: var(--sp-9) 0 var(--sp-8);
  border-bottom: 1px solid var(--m3-outline-variant);
  background: var(--m3-surface);
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(620px 260px at 12% -20%, var(--hero-glow-a), transparent 68%);
}
.page-hero .container { position: relative; }
.page-hero h1 { font-size: var(--fs-h2-lg); font-weight: var(--fw-black); margin-bottom: var(--sp-4); }
.page-hero .lead { margin-bottom: 0; max-width: 680px; }

.crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; list-style: none; margin-bottom: var(--sp-4); font-size: 0.83rem; color: var(--m3-text-secondary); }
.crumbs li { display: flex; align-items: center; gap: 8px; }
.crumbs li + li::before { content: "/"; color: var(--m3-text-disabled); }
.crumbs a { color: var(--m3-text-secondary); }
.crumbs a:hover { color: var(--m3-primary); }
.crumbs [aria-current="page"] { color: var(--m3-text-primary); font-weight: var(--fw-medium); }

/* ── Sections ─────────────────────────────────────────────────────────────── */
.section { padding: var(--sp-11) 0; }
.section-sm { padding: var(--sp-9) 0; }
.section-alt {
  background: var(--m3-surface-container);
  border-block: 1px solid var(--m3-outline-variant);
}

.eyebrow {
  font-size: 0.78rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--m3-primary);
  margin-bottom: var(--sp-3);
}
.section h2 { font-size: var(--fs-h2-lg); margin-bottom: var(--sp-4); }
.section-lead { max-width: 660px; font-size: var(--fs-lead); margin-bottom: var(--sp-8); }
.section-head { margin-bottom: var(--sp-8); }
.section-head .section-lead { margin-bottom: 0; }
.section-foot { margin-top: var(--sp-7); display: flex; flex-wrap: wrap; gap: var(--sp-3); }

/* ── Surfaces ─────────────────────────────────────────────────────────────── */
.card {
  background: var(--m3-surface-variant);
  border: 1px solid var(--m3-outline-variant);
  border-radius: var(--r-card);
  padding: var(--sp-6);
  box-shadow: var(--elev-1);
}
[data-theme="light"] .card { border-color: var(--m3-outline); }

/* Glass card — the app's discovery/dashboard language (SKILL §1.1) */
.glass {
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-card);
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
}
.glass-strong { background: var(--glass-bg-strong); }
.glass-interactive {
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.glass-interactive:hover {
  transform: translateY(-4px);
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-strong);
  box-shadow: var(--glass-shadow-hover);
}
.glass > .shine {
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-shine), transparent);
  pointer-events: none;
}

/* ── Feature / module cards ───────────────────────────────────────────────── */
.grid { display: grid; gap: var(--sp-5); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* Icon-forward card: the icon is the hero (SKILL §1.1, §7.4) */
.icon-tile {
  width: 48px; height: 48px;
  display: grid;
  place-items: center;
  border-radius: var(--r-full);
  background: var(--glow-blue-bg);
  box-shadow: var(--glow-blue-shadow);
  color: var(--glow-blue);
  margin-bottom: var(--sp-4);
}
.icon-tile .icon { width: 23px; height: 23px; }
.icon-tile.t-violet { background: var(--glow-violet-bg); box-shadow: var(--glow-violet-shadow); color: var(--glow-violet); }
.icon-tile.t-green  { background: var(--glow-green-bg);  box-shadow: var(--glow-green-shadow);  color: var(--glow-green); }
.icon-tile.t-amber  { background: var(--glow-amber-bg);  box-shadow: var(--glow-amber-shadow);  color: var(--glow-amber); }
.icon-tile.t-red    { background: var(--glow-red-bg);    box-shadow: var(--glow-red-shadow);    color: var(--glow-red); }
.icon-tile.t-slate  { background: var(--glow-slate-bg);  box-shadow: var(--glow-slate-shadow);  color: var(--m3-text-secondary); }

.feature-card { display: flex; flex-direction: column; padding: var(--sp-6); }
.feature-card h3 { font-size: var(--fs-h2); margin-bottom: 10px; }
.feature-card p { font-size: 0.92rem; }
.feature-card .card-link { margin-top: auto; padding-top: var(--sp-4); font-size: 0.87rem; font-weight: var(--fw-semibold); display: inline-flex; align-items: center; gap: 6px; }

/* Compact list card */
.list-card { padding: var(--sp-5) var(--sp-6); display: flex; gap: var(--sp-4); align-items: flex-start; }
.list-card .icon-tile { width: 40px; height: 40px; margin-bottom: 0; flex: none; }
.list-card .icon-tile .icon { width: 20px; height: 20px; }
.list-card h3 { font-size: var(--fs-h2); margin-bottom: 5px; }
.list-card p { font-size: 0.89rem; }

/* Numbered module item */
.module-item { display: flex; gap: var(--sp-4); align-items: flex-start; }
.module-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: var(--fw-semibold);
  color: var(--m3-primary);
  border: 1px solid color-mix(in srgb, var(--m3-primary) 34%, transparent);
  background: color-mix(in srgb, var(--m3-primary) 10%, transparent);
  border-radius: var(--r-data);
  padding: 4px 9px;
  line-height: 1.5;
}

/* ── Check lists ──────────────────────────────────────────────────────────── */
.check-list { list-style: none; display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--sp-3); }
.check-list li { display: flex; gap: 11px; align-items: flex-start; font-size: 0.94rem; }
.check-list .icon { color: var(--m3-success); margin-top: 5px; width: 16px; height: 16px; }
/* Dash bullets are absolutely positioned rather than flex items: an inline
   <code>/<a> child would be blockified into its own flex item, so a sentence
   containing one could no longer wrap and would overflow the card. */
.check-list.dash li { display: block; position: relative; padding-left: 22px; }
.check-list.dash li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 11px; height: 2px;
  border-radius: 2px;
  background: var(--m3-primary);
}

/* ── Tables ───────────────────────────────────────────────────────────────── */
.table-wrap {
  border: 1px solid var(--m3-outline-variant);
  border-radius: var(--r-card);
  overflow: hidden;
  background: var(--m3-surface-variant);
  box-shadow: var(--elev-1);
}
.table-scroll { overflow-x: auto; }
table.tbl { width: 100%; border-collapse: collapse; font-size: 0.89rem; min-width: 520px; }
table.tbl caption {
  caption-side: top;
  text-align: left;
  padding: var(--sp-4) var(--sp-5);
  font-size: 10px;
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--m3-text-secondary);
  border-bottom: 1px solid var(--m3-outline-variant);
}
table.tbl th, table.tbl td { padding: 12px var(--sp-5); text-align: left; border-bottom: 1px solid var(--m3-outline-variant); vertical-align: top; }
table.tbl thead th {
  font-size: 10px;
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--m3-text-secondary);
  background: var(--m3-surface-container);
  white-space: nowrap;
}
table.tbl tbody tr:last-child th, table.tbl tbody tr:last-child td { border-bottom: 0; }
table.tbl tbody tr:hover { background: var(--hover-wash); }
table.tbl th[scope="row"] { color: var(--m3-text-primary); font-weight: var(--fw-semibold); }
table.tbl td { color: var(--m3-text-secondary); }
table.tbl code { font-size: 0.86em; }

.yn { font-weight: var(--fw-bold); }
.yn-yes { color: var(--m3-success); }
.yn-no  { color: var(--m3-text-disabled); }
.yn-part { color: var(--m3-warning); }

/* ── Pipeline diagram ─────────────────────────────────────────────────────── */
.pipeline {
  background: var(--m3-surface-variant);
  border: 1px solid var(--m3-outline-variant);
  border-radius: var(--r-card);
  padding: var(--sp-6);
  box-shadow: var(--elev-1);
  overflow-x: auto;
}
.pipe { display: flex; align-items: center; gap: 10px; min-width: max-content; }
.pipe-node {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  border: 1px solid var(--m3-outline);
  border-radius: 11px;
  background: var(--m3-surface-container);
  color: var(--m3-text-primary);
  font-size: 0.85rem;
  font-weight: var(--fw-semibold);
  white-space: nowrap;
}
.pipe-kind { width: 9px; height: 9px; border-radius: 3px; flex: none; }
.k-input { background: #38bdf8; }
.k-meta  { background: #a78bfa; }
.k-priv  { background: #4ade80; }
.k-file  { background: #fbbf24; }
.k-img   { background: #fb7185; }
.k-stego { background: #c084fc; }
.k-out   { background: #94a3b8; }
.pipe-arrow { color: var(--m3-text-disabled); font-size: 1.05rem; }

/* ── Stats strip ──────────────────────────────────────────────────────────── */
.stats { border-block: 1px solid var(--m3-outline-variant); background: var(--m3-surface-container); padding: var(--sp-7) 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--sp-6); }
.stat { text-align: center; }
.stat-num { display: block; font-size: 2.05rem; font-weight: var(--fw-black); color: var(--m3-primary); letter-spacing: var(--ls-tight); line-height: 1.1; }
.stat-label { font-size: 0.85rem; color: var(--m3-text-secondary); font-weight: var(--fw-medium); }

/* ── Callouts ─────────────────────────────────────────────────────────────── */
.callout {
  display: flex;
  gap: var(--sp-4);
  padding: var(--sp-5);
  border: 1px solid var(--m3-outline);
  border-left-width: 3px;
  border-radius: var(--r-data);
  background: var(--m3-surface-container);
  font-size: 0.92rem;
}
.callout .icon { width: 19px; height: 19px; margin-top: 3px; flex: none; }
.callout h3, .callout strong:first-child { display: block; margin-bottom: 5px; color: var(--m3-text-primary); }
.callout p + p { margin-top: 8px; }
.callout-info { border-left-color: var(--m3-primary); }
.callout-info .icon { color: var(--m3-primary); }
.callout-success { border-left-color: var(--m3-success); }
.callout-success .icon { color: var(--m3-success); }
.callout-warning { border-left-color: var(--m3-warning); }
.callout-warning .icon { color: var(--m3-warning); }
.callout-danger { border-left-color: var(--m3-error); }
.callout-danger .icon { color: var(--m3-error); }

/* ── Prose (content pages) ────────────────────────────────────────────────── */
.prose { max-width: var(--max-w-narrow); }
.prose > * + * { margin-top: var(--sp-5); }
.prose h2 { font-size: 1.42rem; margin-top: var(--sp-9); padding-top: var(--sp-2); }
.prose h3 { font-size: 1.08rem; margin-top: var(--sp-7); }
.prose h2 + h3, .prose h2 + p, .prose h3 + p { margin-top: var(--sp-3); }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: 7px; }
.prose ul li::marker { color: var(--m3-primary); }
.prose ol li::marker { color: var(--m3-primary); font-weight: var(--fw-semibold); }
.prose h2:first-child, .prose h3:first-child { margin-top: 0; }

/* ── Steps / process ──────────────────────────────────────────────────────── */
.steps { list-style: none; counter-reset: step; display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--sp-5); }
.steps > li { position: relative; counter-increment: step; padding-left: 56px; }
.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0; top: 0;
  width: 36px; height: 36px;
  display: grid;
  place-items: center;
  border-radius: var(--r-full);
  background: var(--m3-primary-container);
  color: var(--m3-on-primary-container);
  border: 1px solid color-mix(in srgb, var(--m3-primary) 32%, transparent);
  font-weight: var(--fw-bold);
  font-size: 0.92rem;
}
.steps h3 { font-size: 1.03rem; margin-bottom: 6px; }
.steps p { font-size: 0.93rem; }

/* ── Definition rows (spec sheets) ────────────────────────────────────────── */
.spec-card { padding: var(--sp-2) var(--sp-6); }
.spec-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--sp-4);
  padding: 12px 0;
  border-bottom: 1px solid var(--m3-outline-variant);
  font-size: 0.89rem;
}
.spec-row:last-child { border-bottom: 0; }
.spec-row dt { color: var(--m3-text-secondary); }
.spec-row dd { margin: 0; color: var(--m3-text-primary); font-weight: var(--fw-semibold); font-family: var(--font-mono); font-size: 0.84rem; text-align: right; }
.spec-row dd code { font-size: 0.98em; }

/* ── FAQ (native <details>, works without JS) ─────────────────────────────── */
.faq-list { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--sp-3); }
.faq-item {
  background: var(--m3-surface-variant);
  border: 1px solid var(--m3-outline-variant);
  border-radius: var(--r-card);
  padding: 2px var(--sp-6);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
[data-theme="light"] .faq-item { border-color: var(--m3-outline); }
.faq-item[open] { border-color: color-mix(in srgb, var(--m3-primary) 42%, var(--m3-outline)); }
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: 17px 0;
  cursor: pointer;
  list-style: none;
  color: var(--m3-text-primary);
  font-weight: var(--fw-semibold);
  font-size: 0.99rem;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "";
  flex: none;
  width: 11px; height: 11px;
  border-right: 2px solid var(--m3-primary);
  border-bottom: 2px solid var(--m3-primary);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform var(--dur) var(--ease);
}
.faq-item[open] summary::after { transform: rotate(225deg) translate(-2px, -2px); }
.faq-item .faq-body { padding: 0 0 20px; font-size: 0.94rem; }
.faq-item .faq-body > * + * { margin-top: var(--sp-4); }
.faq-item .faq-body ul { padding-left: 1.25em; }
.faq-item .faq-body li + li { margin-top: 6px; }

/* ── CTA panel ────────────────────────────────────────────────────────────── */
.cta-panel {
  position: relative;
  text-align: center;
  padding: var(--sp-10) var(--sp-7);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-card);
  background:
    radial-gradient(620px 260px at 50% -40%, color-mix(in srgb, var(--m3-primary) 18%, transparent), transparent 70%),
    var(--glass-bg-strong);
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  overflow: hidden;
}
.cta-logo { margin: 0 auto var(--sp-5); border-radius: 18px; box-shadow: var(--glow-blue-shadow); }
.cta-panel h2 { font-size: var(--fs-h2-lg); margin-bottom: var(--sp-4); }
.cta-panel > p { max-width: 560px; margin: 0 auto var(--sp-7); font-size: var(--fs-lead); }
.cta-panel .hero-actions { justify-content: center; margin-bottom: var(--sp-5); }
.cta-note { font-size: 0.83rem; color: var(--m3-text-secondary); }

/* ── Store button ─────────────────────────────────────────────────────────── */
.store-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 12px 22px;
  border-radius: var(--r-input);
  border: 1px solid var(--m3-outline);
  background: var(--m3-surface-container);
  color: var(--m3-text-primary);
  text-align: left;
  transition: border-color var(--dur) var(--ease), transform var(--dur-fast) var(--ease), background var(--dur) var(--ease);
}
.store-btn:hover { border-color: var(--m3-primary); transform: translateY(-1px); text-decoration: none; }
.store-btn .icon { width: 26px; height: 26px; color: var(--m3-primary); }
.store-btn .store-btn-text { display: flex; flex-direction: column; line-height: 1.25; }
.store-btn .store-btn-kicker { font-size: 0.68rem; letter-spacing: var(--ls-label); text-transform: uppercase; color: var(--m3-text-secondary); font-weight: var(--fw-semibold); }
.store-btn .store-btn-title { font-size: 1rem; font-weight: var(--fw-bold); color: var(--m3-text-primary); }

/* ── App window mockup (hero visual) ──────────────────────────────────────── */
.hero-visual { position: relative; }
.app-window {
  position: relative;
  z-index: 1;
  border: 1px solid var(--m3-outline);
  border-radius: var(--r-card);
  background: var(--m3-surface);
  box-shadow: var(--elev-3), 0 0 70px color-mix(in srgb, var(--m3-primary) 16%, transparent);
  overflow: hidden;
}
.app-titlebar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 11px 15px;
  background: var(--m3-surface-container);
  border-bottom: 1px solid var(--m3-outline-variant);
}
.traffic { display: flex; gap: 6px; }
.traffic i { width: 11px; height: 11px; border-radius: 50%; display: block; }
.traffic i:nth-child(1) { background: #f87171; }
.traffic i:nth-child(2) { background: #fbbf24; }
.traffic i:nth-child(3) { background: #4ade80; }
.app-title { font-size: 0.82rem; font-weight: var(--fw-semibold); color: var(--m3-text-secondary); }
.app-status {
  margin-left: auto;
  padding: 3px 11px;
  border: 1px solid var(--m3-outline);
  border-radius: var(--r-full);
  font-size: 0.71rem;
  color: var(--m3-text-secondary);
}
.app-body { display: grid; grid-template-columns: 172px minmax(0, 1fr); }
.app-sidebar {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 12px 10px;
  background: var(--m3-surface-container);
  border-right: 1px solid var(--m3-outline-variant);
}
.side-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 11px;
  border-radius: var(--r-pill);
  font-size: 0.78rem;
  font-weight: var(--fw-medium);
  color: var(--m3-text-secondary);
  white-space: nowrap;
}
.side-item .icon { width: 15px; height: 15px; flex: none; }
.side-item.active { background: var(--m3-secondary-container); color: var(--m3-primary); font-weight: var(--fw-semibold); }
.app-main { padding: 13px; display: grid; gap: 11px; align-content: start; }

.mock-image {
  position: relative;
  border: 1px solid var(--m3-outline-variant);
  border-radius: var(--r-data);
  overflow: hidden;
  background: var(--m3-surface-container);
  aspect-ratio: 200 / 138;
}
.mock-svg { width: 100%; height: 100%; display: block; }
.mock-payload {
  position: absolute;
  left: 9px; bottom: 9px;
  padding: 5px 10px;
  border: 1px solid rgba(125, 211, 252, 0.35);
  border-radius: var(--r-data);
  background: rgba(2, 6, 23, 0.8);
  color: #e0f2fe;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  backdrop-filter: blur(4px);
}
.mock-payload b { color: #7dd3fc; }

.mock-inspector {
  border: 1px solid var(--m3-outline-variant);
  border-radius: var(--r-data);
  background: var(--m3-surface-container);
  padding: 3px 13px;
}
.insp-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  border-bottom: 1px solid var(--m3-outline-variant);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}
.insp-row:last-child { border-bottom: 0; }
.insp-row span { color: var(--m3-text-secondary); }
.insp-row b { color: var(--m3-text-primary); font-weight: var(--fw-semibold); }
.insp-row b.ok { color: var(--m3-success); }
.insp-row b.warn { color: var(--m3-warning); }

.app-statusbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 15px;
  background: var(--m3-surface-container);
  border-top: 1px solid var(--m3-outline-variant);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--m3-text-secondary);
}

.glow { position: absolute; border-radius: 50%; filter: blur(64px); z-index: 0; opacity: 0.55; pointer-events: none; }
.glow-a { width: 260px; height: 260px; background: color-mix(in srgb, var(--m3-primary) 35%, transparent); top: -60px; right: -70px; }
.glow-b { width: 200px; height: 200px; background: color-mix(in srgb, var(--glow-violet) 25%, transparent); bottom: -70px; left: -60px; }

/* ── Screenshot figure ────────────────────────────────────────────────────── */
.shot {
  margin: 0;
  border: 1px solid var(--m3-outline);
  border-radius: var(--r-card);
  overflow: hidden;
  background: var(--m3-surface-container);
  box-shadow: var(--elev-3);
}
.shot img { width: 100%; display: block; }
.shot figcaption {
  padding: 11px var(--sp-5);
  border-top: 1px solid var(--m3-outline-variant);
  font-size: 0.8rem;
  color: var(--m3-text-secondary);
}

/* ── Feature matrix legend ────────────────────────────────────────────────── */
.legend { display: flex; flex-wrap: wrap; gap: var(--sp-4); font-size: 0.82rem; color: var(--m3-text-secondary); margin-top: var(--sp-4); }
.legend span { display: inline-flex; align-items: center; gap: 7px; }

/* ── Footer ───────────────────────────────────────────────────────────────── */
.site-footer {
  margin-top: var(--sp-9);
  padding: var(--sp-9) 0 var(--sp-6);
  background: var(--m3-surface-container);
  border-top: 1px solid var(--m3-outline-variant);
}
.footer-grid { display: grid; grid-template-columns: 1.7fr 1fr 1fr 1fr; gap: var(--sp-7); margin-bottom: var(--sp-8); }
.footer-brand p { margin-top: var(--sp-4); max-width: 320px; font-size: 0.87rem; }
.footer-brand .chip-row { margin-top: var(--sp-4); }
.footer-col { display: flex; flex-direction: column; gap: 9px; align-items: flex-start; }
/* Group labels are real headings (they help screen-reader navigation) but sit
   at h2 so the document outline never skips a level. Sized as labels. */
.footer-col h2 {
  font-size: 0.76rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--m3-text-secondary);
  margin-bottom: 5px;
  line-height: 1.4;
}
.footer-col a { color: var(--m3-text-secondary); font-size: 0.89rem; }
.footer-col a:hover { color: var(--m3-primary); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-4);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--m3-outline-variant);
  font-size: 0.82rem;
  color: var(--m3-text-secondary);
}
.footer-bottom nav { display: flex; flex-wrap: wrap; gap: var(--sp-4); }

/* ── Table of contents (sticky) ───────────────────────────────────────────── */
.toc { position: sticky; top: calc(var(--header-h) + var(--sp-5)); font-size: 0.87rem; }
.toc h2 {
  font-size: 10px;
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--m3-text-secondary);
  margin-bottom: var(--sp-3);
}
.toc ul { list-style: none; display: grid; grid-template-columns: minmax(0, 1fr); gap: 2px; }
.toc a {
  display: block;
  padding: 6px 11px;
  border-left: 2px solid var(--m3-outline-variant);
  color: var(--m3-text-secondary);
  font-size: 0.855rem;
}
.toc a:hover { color: var(--m3-text-primary); border-left-color: var(--m3-primary); background: var(--hover-wash); text-decoration: none; }
.toc a.is-active { color: var(--m3-primary); border-left-color: var(--m3-primary); font-weight: var(--fw-semibold); }

.layout-doc { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: var(--sp-9); align-items: start; }

/* ── Reveal-on-scroll (only when JS is present) ───────────────────────────── */
html.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease); }
html.js .reveal.is-visible { opacity: 1; transform: none; }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: var(--sp-8); }
  .hero-visual { max-width: 660px; }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .layout-doc { grid-template-columns: minmax(0, 1fr); gap: var(--sp-7); }
  .toc { position: static; }
  .toc ul { display: flex; flex-wrap: wrap; gap: 4px; }
  .toc a { border-left: 0; border: 1px solid var(--m3-outline-variant); border-radius: var(--r-full); padding: 5px 12px; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: absolute;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 3px;
    margin: 0;
    padding: var(--sp-4) var(--sp-6) var(--sp-5);
    background: var(--m3-surface);
    border-bottom: 1px solid var(--m3-outline);
    box-shadow: var(--elev-3);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a:not(.btn) { padding: 12px; font-size: 1rem; }
  .nav-cta-group { flex-direction: column; margin: var(--sp-2) 0 0; }
  .theme-toggle { display: none; }
  .nav-links .theme-toggle { display: inline-flex; align-self: flex-start; margin: var(--sp-3) 0 0; }

  .section { padding: var(--sp-9) 0; }
  .hero { padding: var(--sp-9) 0 var(--sp-8); }
  .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sp-5); }
  .grid, .grid-2, .grid-3, .grid-4 { grid-template-columns: minmax(0, 1fr); }
  .app-body { grid-template-columns: 132px minmax(0, 1fr); }
  .app-statusbar { flex-direction: column; gap: 4px; }
}

@media (max-width: 560px) {
  .container { padding-inline: var(--sp-5); }
  /* Long labels ("Microsoft Store — coming soon") cannot honour width:100%
     while nowrap: the flex automatic minimum size keeps them at max-content. */
  .btn { white-space: normal; min-width: 0; }
  .hero-actions .btn { width: 100%; }
  .cta-panel { padding: var(--sp-8) var(--sp-5); }
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: var(--sp-6); }
  .footer-bottom { flex-direction: column; align-items: flex-start; text-align: left; }
  .steps > li { padding-left: 0; padding-top: 46px; }
  .steps > li::before { top: 0; }
  table.tbl th, table.tbl td { padding: 10px var(--sp-4); }
}

/* ── Reduced motion ───────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  html.js .reveal { opacity: 1; transform: none; }
}

/* ── Print ────────────────────────────────────────────────────────────────── */
@media print {
  .site-header, .site-footer, .hero-actions, .theme-toggle, .toc, .cta-panel .hero-actions { display: none !important; }
  body { background: #fff; color: #000; }
  .section, .hero, .page-hero { padding: 16px 0; }
  a { color: #000; text-decoration: underline; }
  .glass, .card, .table-wrap { box-shadow: none; border-color: #ccc; background: #fff; }
  .faq-item { break-inside: avoid; }
}