/* AIMech Stylesheet — Periwinkle Lavender & Cool Frost Theme */
:root {
  --bg: #f8f9fc;
  --card: #ffffff;
  --card-muted: #f1f3f9;
  --line: #d5d9e8;
  --ink: #1a1c2e;
  --meta: #525a7a;
  --accent: #5662a8;
  --accent-hover: #434e91;
  --accent-light: #e8eaf6;
  --pastel-a: #DCE0F9;
  --pastel-b: #E5E9F0;
  --table-stripe: #f5f6fc;
  --table-hover: #eceef8;

  --badge-curated-bg: #e0e4fc;
  --badge-curated-text: #2f3775;
  --badge-curated-border: #b8c2f5;

  --badge-aio-bg: #e2e8f0;
  --badge-aio-text: #334155;
  --badge-aio-border: #cbd5e1;

  --badge-mech-bg: #dcfce7;
  --badge-mech-text: #166534;
  --badge-mech-border: #86efac;

  --badge-limit-bg: #fee2e2;
  --badge-limit-text: #991b1b;
  --badge-limit-border: #fca5a5;

  --badge-scope-bg: #fef3c7;
  --badge-scope-text: #92400e;
  --badge-scope-border: #fcd34d;

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

:root[data-theme="dark"] {
  --bg: #0f111a;
  --card: #171a29;
  --card-muted: #1e2236;
  --line: #2b304c;
  --ink: #e6e9f5;
  --meta: #9aa1c2;
  --accent: #9aa4e8;
  --accent-hover: #b4bcf5;
  --accent-light: #20243d;
  --pastel-a: #1f243d;
  --pastel-b: #151827;
  --table-stripe: #131624;
  --table-hover: #1c2035;

  --badge-curated-bg: #262c52;
  --badge-curated-text: #c5ccfa;
  --badge-curated-border: #444d85;

  --badge-aio-bg: #1e293b;
  --badge-aio-text: #cbd5e1;
  --badge-aio-border: #334155;

  --badge-mech-bg: #064e3b;
  --badge-mech-text: #a7f3d0;
  --badge-mech-border: #047857;

  --badge-limit-bg: #7f1d1d;
  --badge-limit-text: #fecaca;
  --badge-limit-border: #991b1b;

  --badge-scope-bg: #78350f;
  --badge-scope-text: #fde68a;
  --badge-scope-border: #92400e;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f111a;
    --card: #171a29;
    --card-muted: #1e2236;
    --line: #2b304c;
    --ink: #e6e9f5;
    --meta: #9aa1c2;
    --accent: #9aa4e8;
    --accent-hover: #b4bcf5;
    --accent-light: #20243d;
    --pastel-a: #1f243d;
    --pastel-b: #151827;
    --table-stripe: #131624;
    --table-hover: #1c2035;

    --badge-curated-bg: #262c52;
    --badge-curated-text: #c5ccfa;
    --badge-curated-border: #444d85;

    --badge-aio-bg: #1e293b;
    --badge-aio-text: #cbd5e1;
    --badge-aio-border: #334155;

    --badge-mech-bg: #064e3b;
    --badge-mech-text: #a7f3d0;
    --badge-mech-border: #047857;

    --badge-limit-bg: #7f1d1d;
    --badge-limit-text: #fecaca;
    --badge-limit-border: #991b1b;

    --badge-scope-bg: #78350f;
    --badge-scope-text: #fde68a;
    --badge-scope-border: #92400e;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  font-size: 15px;
}

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

code, pre {
  font-family: var(--mono);
  font-size: 0.9em;
}

code {
  background: var(--card-muted);
  padding: 0.15em 0.35em;
  border-radius: 4px;
  border: 1px solid var(--line);
}

/* Header & Nav */
header {
  background: linear-gradient(135deg, var(--pastel-a), var(--pastel-b));
  border-bottom: 1px solid var(--line);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand {
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: -0.02em;
}
.brand:hover {
  text-decoration: none;
  opacity: 0.9;
}
.brand-tag {
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--accent);
  color: #fff;
  padding: 0.15rem 0.5rem;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

nav {
  display: flex;
  gap: 1.25rem;
  align-items: center;
  font-weight: 500;
}
nav a {
  color: var(--ink);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  transition: background 0.15s;
}
nav a:hover {
  background: rgba(0, 0, 0, 0.06);
  text-decoration: none;
}
:root[data-theme="dark"] nav a:hover {
  background: rgba(255, 255, 255, 0.08);
}

/* Main Layout */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--meta);
  margin-bottom: 1.5rem;
}
.breadcrumbs span {
  opacity: 0.6;
}

/* Hero Section */
.hero {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 2.25rem 2rem;
  margin-bottom: 2.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}
.hero h1 {
  margin: 0 0 0.5rem;
  font-size: 2rem;
  letter-spacing: -0.02em;
}
.hero p.lead {
  margin: 0 0 1.5rem;
  font-size: 1.1rem;
  color: var(--meta);
  max-width: 860px;
  line-height: 1.6;
}

/* Metric Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.stat-card {
  background: var(--card-muted);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.1rem 1rem;
  text-align: center;
}
.stat-number {
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
  margin-bottom: 0.25rem;
}
.stat-label {
  font-size: 0.82rem;
  color: var(--meta);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Section Headings */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin: 2.5rem 0 1rem;
  border-bottom: 2px solid var(--line);
  padding-bottom: 0.5rem;
}
.section-header h2 {
  margin: 0;
  font-size: 1.45rem;
  letter-spacing: -0.01em;
}
.section-header a.view-all {
  font-size: 0.9rem;
  font-weight: 600;
}

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 1.25rem;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 1rem;
}

/* Category & Featured Cards */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
}
.card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.5rem;
}
.card-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 600;
}
.card-count {
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--accent-light);
  color: var(--accent);
  padding: 0.15rem 0.5rem;
  border-radius: 10px;
}
.card-body {
  font-size: 0.9rem;
  color: var(--meta);
  flex: 1;
  line-height: 1.5;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  border: 1px solid transparent;
  white-space: nowrap;
}
.badge-curated {
  background: var(--badge-curated-bg);
  color: var(--badge-curated-text);
  border-color: var(--badge-curated-border);
}
.badge-aio {
  background: var(--badge-aio-bg);
  color: var(--badge-aio-text);
  border-color: var(--badge-aio-border);
}
.badge-mechanism {
  background: var(--badge-mech-bg);
  color: var(--badge-mech-text);
  border-color: var(--badge-mech-border);
}
.badge-limitation {
  background: var(--badge-limit-bg);
  color: var(--badge-limit-text);
  border-color: var(--badge-limit-border);
}
.badge-scope {
  background: var(--badge-scope-bg);
  color: var(--badge-scope-text);
  border-color: var(--badge-scope-border);
}
.badge-application {
  background: var(--accent-light);
  color: var(--accent);
  border-color: var(--line);
}

/* Tables */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  margin-top: 1rem;
}
table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}
th {
  background: var(--card-muted);
  padding: 0.75rem 1rem;
  font-weight: 600;
  color: var(--ink);
  border-bottom: 2px solid var(--line);
  white-space: nowrap;
}
td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
tr:nth-child(even) td {
  background: var(--table-stripe);
}
tr:hover td {
  background: var(--table-hover);
}

/* Search and Filters */
.browser-controls {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.search-bar {
  display: flex;
  gap: 0.5rem;
}
.search-input {
  flex: 1;
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--ink);
  font-size: 0.95rem;
}
.search-input:focus {
  outline: 2px solid var(--accent);
  border-color: transparent;
}
.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}
.filter-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--meta);
}
.filter-select {
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--ink);
  font-size: 0.85rem;
}
.btn {
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--card-muted);
  color: var(--ink);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover {
  background: var(--accent-light);
  border-color: var(--accent);
}
.filter-count {
  margin-left: auto;
  font-size: 0.85rem;
  color: var(--meta);
  font-weight: 600;
}

/* Detail Pages */
.detail-header {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.75rem 2rem;
  margin-bottom: 1.75rem;
}
.detail-title-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}
.detail-title {
  margin: 0;
  font-size: 2rem;
  letter-spacing: -0.02em;
}
.detail-id {
  font-family: var(--mono);
  font-size: 0.95rem;
  color: var(--meta);
  background: var(--card-muted);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  border: 1px solid var(--line);
}
.detail-desc {
  font-size: 1.1rem;
  line-height: 1.6;
  margin: 1rem 0 0;
  color: var(--ink);
}
.identity-box {
  background: var(--card-muted);
  border-left: 4px solid var(--accent);
  padding: 0.9rem 1.25rem;
  margin-top: 1.25rem;
  border-radius: 0 6px 6px 0;
  font-size: 0.95rem;
}
.identity-box strong {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--meta);
  margin-bottom: 0.25rem;
}

/* Claims Section */
.claim-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.claim-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}
.claim-statement {
  font-size: 1rem;
  margin: 0.5rem 0 0.75rem;
  line-height: 1.5;
}
.evidence-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.evidence-item {
  background: var(--card-muted);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.6rem 0.9rem;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.evidence-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  color: var(--meta);
}

/* Limitations Box */
.limitations-box {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 4px solid var(--badge-limit-text);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}
.limitations-box h3 {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
  color: var(--badge-limit-text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.limitations-box ul {
  margin: 0;
  padding-left: 1.25rem;
}
.limitations-box li {
  margin-bottom: 0.4rem;
  line-height: 1.5;
}

/* Callout Box */
.callout {
  background: var(--card-muted);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}
.callout-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--meta);
  margin-bottom: 0.5rem;
}

/* Footer */
footer {
  border-top: 1px solid var(--line);
  background: var(--card);
  padding: 2rem 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--meta);
}
footer a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}
footer a:hover {
  color: var(--accent);
}
footer .fam {
  margin-top: 0.75rem;
  line-height: 1.8;
}
footer span.self {
  font-weight: 700;
  color: var(--accent);
  background: var(--pastel-a);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

@media (max-width: 768px) {
  header {
    flex-direction: column;
    align-items: flex-start;
  }
  nav {
    flex-wrap: wrap;
    gap: 0.75rem;
  }
  .hero {
    padding: 1.5rem;
  }
  .hero h1 {
    font-size: 1.6rem;
  }
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
}