/* ==========================================================================
   Digital Asset Marketplace — Charter reference site
   Palette: deep space navy + violet / cyan / pink accents (creative, digital)
   ========================================================================== */

:root {
  --bg: #0a0c12;
  --bg-elevated: #10131c;
  --surface: #171b26;
  --surface-hover: #1e2330;
  --border: #262b3a;
  --border-strong: #333952;

  --text-primary: #f2f4f8;
  --text-secondary: #a6adbd;
  --text-muted: #6b7284;

  --violet: #8b5cf6;
  --violet-soft: rgba(139, 92, 246, 0.14);
  --cyan: #22d3ee;
  --cyan-soft: rgba(34, 211, 238, 0.14);
  --pink: #f472b6;
  --pink-soft: rgba(244, 114, 182, 0.14);
  --amber: #fbbf24;
  --amber-soft: rgba(251, 191, 36, 0.14);
  --green: #34d399;
  --green-soft: rgba(52, 211, 153, 0.14);
  --danger: #fb7185;
  --danger-soft: rgba(251, 113, 133, 0.14);

  --gradient-brand: linear-gradient(135deg, var(--violet), var(--cyan));
  --gradient-hero: radial-gradient(60% 60% at 15% 0%, rgba(139, 92, 246, 0.22), transparent 60%),
                    radial-gradient(50% 50% at 90% 10%, rgba(34, 211, 238, 0.16), transparent 60%);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.45);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --sidebar-w: 272px;
  --topbar-h: 64px;
}

:root[data-theme="light"] {
  --bg: #f9fafc;
  --bg-elevated: #ffffff;
  --surface: #f2f4f8;
  --surface-hover: #e9ecf3;
  --border: #e3e6ee;
  --border-strong: #cdd2e0;

  --text-primary: #12141c;
  --text-secondary: #4b5163;
  --text-muted: #767d8f;

  --violet: #7c3aed;
  --violet-soft: rgba(124, 58, 237, 0.1);
  --cyan: #0891b2;
  --cyan-soft: rgba(8, 145, 178, 0.1);
  --pink: #db2777;
  --pink-soft: rgba(219, 39, 119, 0.1);
  --amber: #d97706;
  --amber-soft: rgba(217, 119, 6, 0.1);
  --green: #059669;
  --green-soft: rgba(5, 150, 105, 0.1);
  --danger: #e11d48;
  --danger-soft: rgba(225, 29, 72, 0.1);

  --gradient-hero: radial-gradient(60% 60% at 15% 0%, rgba(124, 58, 237, 0.12), transparent 60%),
                    radial-gradient(50% 50% at 90% 10%, rgba(8, 145, 178, 0.1), transparent 60%);

  --shadow-sm: 0 1px 2px rgba(20, 24, 40, 0.06);
  --shadow-md: 0 8px 24px rgba(20, 24, 40, 0.08);
  --shadow-lg: 0 16px 48px rgba(20, 24, 40, 0.12);
}

/* ---------------------------------- Reset ---------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.25s ease, color 0.25s ease;
}
h1, h2, h3, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input { font: inherit; color: inherit; background: none; border: none; }
input:focus { outline: none; }
img { max-width: 100%; display: block; }
code { font-family: var(--font-mono); }

::selection { background: var(--violet); color: #fff; }

/* Author rules below set `display` on several of these elements (.callout,
   .tab-panel, .code-block…), which would otherwise beat the UA [hidden]
   default in the cascade. Force it to always win. */
[hidden] { display: none !important; }

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

.icon-defs { position: absolute; width: 0; height: 0; overflow: hidden; }

.icon {
  width: 18px;
  height: 18px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------------------------------- Progress bar ---------------------------------- */
.progress-bar {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: var(--gradient-brand);
  z-index: 1000;
  transition: width 0.1s ease-out;
}

/* ---------------------------------- Top bar ---------------------------------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px;
  background: color-mix(in srgb, var(--bg-elevated) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: background 0.15s ease, color 0.15s ease;
}
.icon-btn:hover { background: var(--surface-hover); color: var(--text-primary); }

.sidebar-toggle { display: none; }

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--gradient-brand);
  box-shadow: var(--shadow-sm);
  flex: none;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { font-weight: 700; font-size: 0.95rem; }
.brand-sub { font-size: 0.72rem; color: var(--text-muted); font-weight: 500; }

.topbar-spacer { flex: 1; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1px solid var(--border-strong);
  white-space: nowrap;
}
.chip-muted { color: var(--text-secondary); background: var(--surface); }
.chip-brand {
  color: var(--violet);
  background: var(--violet-soft);
  border-color: transparent;
}

#themeToggle .icon-moon { display: none; }
:root[data-theme="light"] #themeToggle .icon-sun { display: none; }
:root[data-theme="light"] #themeToggle .icon-moon { display: block; }

/* ---------------------------------- Shell / layout ---------------------------------- */
.shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  align-items: start;
}

.sidebar {
  position: sticky;
  top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  border-right: 1px solid var(--border);
  overflow-y: auto;
}
.sidebar-inner {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 28px 18px;
}
.sidebar-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0 12px;
  margin-bottom: 10px;
}
.sidebar-nav { display: flex; flex-direction: column; gap: 2px; }
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background 0.15s ease, color 0.15s ease;
}
.sidebar-nav a .icon { width: 16px; height: 16px; color: var(--text-muted); transition: color 0.15s ease; }
.sidebar-nav a:hover { background: var(--surface); color: var(--text-primary); }
.sidebar-nav a.active {
  background: var(--violet-soft);
  color: var(--violet);
}
.sidebar-nav a.active .icon { color: var(--violet); }

.sidebar-meta {
  margin-top: auto;
  padding: 16px 12px 4px;
  border-top: 1px solid var(--border);
}
.sidebar-org { font-weight: 700; font-size: 0.88rem; }
.sidebar-audience { font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; }

.sidebar-scrim {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 90;
}

main { min-width: 0; padding: 0 40px 80px; }

/* ---------------------------------- Hero ---------------------------------- */
.hero {
  position: relative;
  padding: 76px 8px 56px;
  max-width: 780px;
  background-image: var(--gradient-hero);
  background-repeat: no-repeat;
}
.hero h1 {
  font-size: clamp(2rem, 4.2vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin: 18px 0 20px;
}
.text-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-lede {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 640px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.92rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn .icon { width: 16px; height: 16px; }
.btn-primary {
  background: var(--gradient-brand);
  color: #0a0c12;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-lg); }
.btn-ghost {
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  background: var(--surface);
}
.btn-ghost:hover { background: var(--surface-hover); }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 48px;
  max-width: 620px;
}
.stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 4px;
  border-top: 1px solid var(--border-strong);
}
.stat-num { font-size: 1.5rem; font-weight: 800; color: var(--text-primary); }
.stat-label { font-size: 0.76rem; color: var(--text-muted); font-weight: 500; }

/* ---------------------------------- Sections ---------------------------------- */
.section {
  padding-top: 64px;
  scroll-margin-top: calc(var(--topbar-h) + 16px);
  max-width: 980px;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.section.in-view { opacity: 1; transform: translateY(0); }

.eyebrow {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--cyan);
  margin-bottom: 10px;
}
.section h2 {
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}
.section-lede {
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: 30px;
  font-size: 1rem;
}

/* ---------------------------------- Grid & cards ---------------------------------- */
.grid { display: grid; gap: 16px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.card, .role-card, .tech-card, .schema-card, .rule-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover, .tech-card:hover, .role-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  margin-bottom: 14px;
}
.card-icon .icon { width: 20px; height: 20px; }
.icon-violet { background: var(--violet-soft); color: var(--violet); }
.icon-cyan   { background: var(--cyan-soft);   color: var(--cyan); }
.icon-pink   { background: var(--pink-soft);   color: var(--pink); }
.icon-amber  { background: var(--amber-soft);  color: var(--amber); }
.icon-green  { background: var(--green-soft);  color: var(--green); }
.icon-danger { background: var(--danger-soft); color: var(--danger); }
.icon-muted  { background: var(--surface);     color: var(--text-muted); }

.card h3, .role-card h3, .tech-card h3, .schema-card h3 { font-size: 1.02rem; font-weight: 700; margin-bottom: 6px; }
.card p, .role-card p, .tech-card p { color: var(--text-secondary); font-size: 0.92rem; }

/* Callouts */
.callout {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  margin-top: 18px;
  font-size: 0.92rem;
}
.callout .icon { margin-top: 2px; flex: none; }
.callout p { color: var(--text-secondary); }
.callout p strong { color: var(--text-primary); }
.callout-info    { background: var(--cyan-soft);   color: var(--cyan); }
.callout-warning { background: var(--amber-soft);  color: var(--amber); }
.callout-accent  { background: var(--violet-soft); color: var(--violet); }

/* ---------------------------------- Filter row / search ---------------------------------- */
.filter-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.search-field {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-elevated);
  min-width: 260px;
  color: var(--text-muted);
  transition: border-color 0.15s ease;
}
.search-field:focus-within { border-color: var(--violet); color: var(--text-primary); }
.search-field input { flex: 1; color: var(--text-primary); }
.search-field input::placeholder { color: var(--text-muted); }
.search-field-sm { min-width: 200px; padding: 8px 12px; }
.filter-count { font-size: 0.82rem; color: var(--text-muted); }

/* Category cards (rendered by JS) */
.category-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.category-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.category-card .cat-top { display: flex; align-items: center; justify-content: space-between; }
.category-card h4 { font-size: 0.98rem; font-weight: 700; }
.category-card .cat-types { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}
.tag-tools { background: var(--pink-soft); color: var(--pink); border-color: transparent; }
.cat-index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ---------------------------------- Roles ---------------------------------- */
.role-head { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.role-head .card-icon { margin-bottom: 0; }
.role-card-active { border-color: var(--violet); box-shadow: 0 0 0 1px var(--violet) inset; }

.table-wrap { margin-top: 8px; overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-md); }
.perm-table { width: 100%; border-collapse: collapse; min-width: 480px; }
.perm-table th, .perm-table td {
  padding: 13px 16px;
  text-align: left;
  font-size: 0.88rem;
  border-bottom: 1px solid var(--border);
}
.perm-table th { color: var(--text-muted); font-weight: 600; font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.05em; background: var(--surface); }
.perm-table th:not(:first-child), .perm-table td:not(:first-child) { text-align: center; }
.perm-table tr:last-child td { border-bottom: none; }
.perm-table tbody tr:hover { background: var(--surface); }
td[data-perm]::before {
  content: "";
  display: inline-flex;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-position: center;
}
td[data-perm="yes"] { color: var(--green); }
td[data-perm="yes"]::before { background: var(--green-soft); }
td[data-perm="no"] { color: var(--text-muted); }
td[data-perm="no"]::before { background: var(--surface); }

/* ---------------------------------- Tech ---------------------------------- */
.tech-name { color: var(--text-primary) !important; font-weight: 600; font-size: 0.9rem; margin-bottom: 4px; }
.tech-card-flow { display: flex; flex-direction: column; justify-content: center; }
.flow-chain {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary) !important;
  line-height: 1.9;
}
.flow-chain span { color: var(--text-muted); }

/* ---------------------------------- Tabs ---------------------------------- */
.tabs {
  display: flex;
  gap: 6px;
  padding: 5px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  width: fit-content;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.tab {
  padding: 9px 16px;
  border-radius: 9px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: background 0.15s ease, color 0.15s ease;
}
.tab:hover { color: var(--text-primary); }
.tab.active { background: var(--bg-elevated); color: var(--violet); box-shadow: var(--shadow-sm); }

.tab-panel { animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }

.check-list { display: flex; flex-direction: column; gap: 4px; }
.check-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 4px;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
  color: var(--text-secondary);
}
.check-list li:last-child { border-bottom: none; }
.check-list li .icon { color: var(--green); margin-top: 2px; flex: none; }
.check-list li strong { color: var(--text-primary); }

/* Mini demo blocks */
.mini-demo {
  margin-top: 26px;
  padding: 20px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
}
.mini-demo-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; flex-wrap: wrap; gap: 8px; }
.mini-demo-title { font-weight: 700; font-size: 0.92rem; }
.mini-demo-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--cyan);
  background: var(--cyan-soft);
  padding: 3px 9px;
  border-radius: 999px;
}
.mini-demo-controls { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 16px; }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip-filter {
  padding: 7px 13px;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  background: var(--surface);
  transition: all 0.15s ease;
}
.chip-filter:hover { color: var(--text-primary); }
.chip-filter.active { background: var(--gradient-brand); color: #0a0c12; border-color: transparent; }

.pack-grid, .tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.pack-card, .tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.pack-card:hover, .tool-card:hover { border-color: var(--violet); transform: translateY(-2px); }
.pack-card-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; margin-bottom: 10px; }
.pack-card h4, .tool-card h4 { font-size: 0.9rem; font-weight: 700; margin-bottom: 4px; }
.pack-card p, .tool-card p { font-size: 0.8rem; color: var(--text-secondary); }
.pack-price { font-family: var(--font-mono); font-weight: 700; color: var(--violet); font-size: 0.88rem; white-space: nowrap; }
.pack-badge {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.pack-badge.published { background: var(--green-soft); color: var(--green); }
.pack-badge.draft { background: var(--surface-hover); color: var(--text-muted); }
.no-results { color: var(--text-muted); font-size: 0.88rem; padding: 20px 4px; grid-column: 1 / -1; }
.tool-card .tool-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 10px; font-size: 0.78rem; font-weight: 600; color: var(--cyan); }

/* ---------------------------------- Schema / code ---------------------------------- */
.schema-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.schema-head h3 { display: flex; align-items: center; gap: 8px; font-family: var(--font-mono); }
.schema-head h3 .icon { width: 16px; height: 16px; color: var(--violet); }
.btn-copy {
  display: flex; align-items: center; justify-content: center;
  width: 30px; height: 30px;
  border-radius: 7px;
  color: var(--text-muted);
  border: 1px solid var(--border);
  transition: color 0.15s ease, border-color 0.15s ease;
}
.btn-copy:hover { color: var(--text-primary); border-color: var(--border-strong); }
.btn-copy.copied { color: var(--green); border-color: var(--green); }

.code-block {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  overflow-x: auto;
  white-space: pre;
}
.code-example { margin-top: 10px; color: var(--cyan); }
.btn-example {
  margin-top: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--violet);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn-example:hover { text-decoration: underline; }

/* ---------------------------------- Rules ---------------------------------- */
.rules-list { display: flex; flex-direction: column; gap: 12px; }
.rule-card { display: flex; gap: 16px; align-items: flex-start; padding: 18px 20px; }
.rule-card .card-icon { margin-bottom: 0; }
.rule-card h3 { font-size: 0.96rem; margin-bottom: 4px; }
.rule-card p { color: var(--text-secondary); font-size: 0.88rem; }

/* ---------------------------------- Deliverables ---------------------------------- */
.deliverable-list { display: flex; flex-direction: column; gap: 2px; margin-bottom: 34px; }
.deliverable-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px 4px;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}
.deliverable-list li:last-child { border-bottom: none; }
.d-num {
  flex: none;
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #0a0c12;
  font-weight: 800;
  font-size: 0.82rem;
}

.flow-stepper {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 24px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
}
.flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-align: center;
  width: 108px;
}
.flow-icon {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--violet-soft);
  color: var(--violet);
}
.flow-arrow { color: var(--border-strong); flex: none; }

/* ---------------------------------- Footer ---------------------------------- */
.site-footer {
  margin-top: 90px;
  padding-top: 26px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.84rem;
  color: var(--text-muted);
}
.footer-title { color: var(--text-primary); font-weight: 700; margin-bottom: 4px; font-size: 0.92rem; }
.footer-note code { background: var(--surface); padding: 2px 6px; border-radius: 5px; }

/* ---------------------------------- To top / toast ---------------------------------- */
.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #0a0c12;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 80;
}
.to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.to-top .icon { transform: rotate(-90deg); }

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 12px);
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 200;
}
.toast.visible { opacity: 1; transform: translate(-50%, 0); }

/* ---------------------------------- Responsive ---------------------------------- */
@media (max-width: 1080px) {
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .sidebar-toggle { display: flex; }
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 84vw;
    max-width: 320px;
    background: var(--bg-elevated);
    z-index: 95;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    padding-top: var(--topbar-h);
  }
  .sidebar.open { transform: translateX(0); box-shadow: var(--shadow-lg); }
  .sidebar-scrim.open { display: block; }
  .topbar-hide-sm { display: none; }
  main { padding: 0 20px 70px; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .hero { padding-top: 48px; }
  .hero-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow-stepper { justify-content: center; }
}

@media (max-width: 520px) {
  .topbar { padding: 0 14px; gap: 8px; }
  .brand-sub { display: none; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { justify-content: center; }
}

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