/* ECIJA Learning — design tokens mirror ecijaai.com */
:root {
  --bg: #f2ece2;
  --bg-elev: #ffffff;
  --bg-tint: #f7f2e8;
  --ink: #14110d;
  --ink-soft: #4a4639;
  --ink-mute: #7d7866;
  --ink-faint: #b3ad9d;
  --line: #e1d9c8;
  --line-strong: #cfc6b3;
  --gold: #7a1722;
  --gold-deep: #5a1019;
  --gold-soft: #a6404c;
  --gold-tint: rgba(122, 23, 34, 0.06);
  --shadow-sm: 0 1px 2px rgba(20, 17, 13, 0.04);
  --shadow-md: 0 10px 30px rgba(20, 17, 13, 0.06);
  --shadow-lg: 0 30px 80px rgba(20, 17, 13, 0.12);
  --radius: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --serif: "Fraunces", "Tiempos Headline", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}
.container-narrow {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 245, 241, 0.88);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-logo { height: 28px; width: auto; }
.brand-suffix {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  font-size: 22px;
  color: var(--gold-deep);
  letter-spacing: 0.02em;
  padding-left: 10px;
  border-left: 1px solid var(--line);
  line-height: 1;
  position: relative;
  top: 1px;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.site-nav a {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
  transition: color 0.2s ease;
}
.site-nav a:hover,
.site-nav a.is-active { color: var(--gold-deep); }

/* ---------- Eyebrow / common ---------- */
.eyebrow {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold-deep);
  margin: 0 0 18px;
}

/* ---------- Hero ---------- */
.hero { padding: 80px 0 64px; }
.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}
.hero-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(40px, 5.4vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0 0 24px;
  max-width: 18ch;
}
.hero-title em {
  font-style: italic;
  font-weight: 500;
  color: var(--gold);
}
.hero-sub {
  font-size: 18px;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0 0 32px;
  max-width: 60ch;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-mute);
}
.hero-meta b { color: var(--ink); font-weight: 600; }

/* ---------- Sections ---------- */
.section { padding: 56px 0; }
.section + .section { border-top: 1px solid var(--line); }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}
.section-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(28px, 3vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ink);
}
.section-title em { font-style: italic; color: var(--gold); font-weight: 500; }
.section-sub {
  font-family: var(--serif);
  font-style: italic;
  font-size: 16px;
  color: var(--ink-mute);
  margin: 8px 0 0;
  max-width: 60ch;
}

/* ---------- Card grid ---------- */
.card-grid {
  display: grid;
  gap: 18px;
}
.card-grid-3 { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.card-grid-2 { grid-template-columns: repeat(auto-fill, minmax(420px, 1fr)); }

.card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 24px 24px 22px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}
.card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.card-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
}
.card-num {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  font-size: 14px;
  color: var(--gold);
  letter-spacing: 0.02em;
}
.card-meta {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.card-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 22px;
  line-height: 1.2;
  color: var(--ink);
  margin: 0;
  letter-spacing: -0.005em;
}
.card-desc {
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
}
.card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--ink-mute);
}
.card-link {
  color: var(--gold);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s ease;
}
.card:hover .card-link { gap: 10px; color: var(--gold-deep); }
.card-link svg { width: 14px; height: 14px; }

/* Card variant: case */
.card-case .stars {
  font-family: var(--serif);
  color: var(--gold);
  letter-spacing: 0.05em;
}
.card-pattern {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: var(--bg-tint);
  border: 1px solid var(--line);
  padding: 4px 10px;
  border-radius: 999px;
}
.card-pattern b { color: var(--gold-deep); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
  text-decoration: none;
  border: 1px solid transparent;
}
.btn svg { width: 14px; height: 14px; }
.btn-primary {
  background: var(--gold);
  color: #faf6ec;
  border-color: var(--gold);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--gold-deep); border-color: var(--gold-deep); }
.btn-primary:active { transform: translateY(1px); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn-ghost:hover { border-color: var(--gold); color: var(--gold-deep); }
.btn-small {
  padding: 8px 14px;
  font-size: 12px;
}

/* ---------- Footer (dark — mirror ecijaai.com) ---------- */
.site-footer {
  margin-top: 80px;
  background: #14110d;
  color: #cdc6b5;
  padding: 56px 0 32px;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 18px;
}
.footer-logo {
  height: 26px;
  filter: brightness(0) invert(1);
  opacity: 0.95;
}
.footer-tagline {
  font-family: var(--serif);
  font-style: italic;
  font-size: 16px;
  margin: 0;
  color: #b8b09b;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 28px;
  padding: 22px 0;
  border-top: 1px solid rgba(122, 23, 34, 0.18);
  border-bottom: 1px solid rgba(122, 23, 34, 0.18);
}
.footer-links a {
  font-size: 12px;
  letter-spacing: 0.02em;
  color: #cdc6b5;
  padding: 6px 0;
  transition: color 0.15s ease;
}
.footer-links a:hover { color: var(--gold); }
.footer-copy {
  font-size: 11px;
  color: #6a6553;
  letter-spacing: 0.04em;
  margin: 0;
}

/* ---------- Page header (non-landing pages) ---------- */
.page-header {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--line);
}
.page-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0 0 14px;
  color: var(--ink);
}
.page-title em { font-style: italic; color: var(--gold); font-weight: 500; }
.page-sub {
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0;
  max-width: 65ch;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.breadcrumb a { color: var(--ink-mute); transition: color 0.15s ease; }
.breadcrumb a:hover { color: var(--gold-deep); }
.breadcrumb-sep { color: var(--ink-faint); }

/* ---------- File browser (two-pane) ---------- */
.case-detail {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 32px;
  margin-top: 32px;
  min-height: 600px;
}
.case-aside {
  position: sticky;
  top: 96px;
  align-self: start;
  max-height: calc(100vh - 120px);
  overflow: auto;
  padding: 22px 20px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.case-aside h3 {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 14px;
}
.case-aside-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.case-info {
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.case-info dt {
  font-family: var(--sans);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-top: 10px;
}
.case-info dt:first-child { margin-top: 0; }
.case-info dd {
  margin: 4px 0 0;
  color: var(--ink);
  font-weight: 500;
}

/* File tree */
.file-tree {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
}
.file-tree ul {
  list-style: none;
  margin: 0;
  padding-left: 16px;
  border-left: 1px solid var(--line);
  margin-left: 8px;
}
.file-tree li { margin: 2px 0; }
.file-tree-dir {
  font-weight: 600;
  color: var(--ink-soft);
  padding: 4px 0;
  display: flex;
  align-items: center;
  gap: 6px;
}
.file-tree-dir::before {
  content: "›";
  font-family: var(--serif);
  color: var(--ink-mute);
  width: 10px;
}
.file-tree-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: var(--radius);
  color: var(--ink-soft);
  cursor: pointer;
  transition: background 0.12s ease, color 0.12s ease;
  font-family: var(--mono);
  font-size: 12px;
}
.file-tree-link:hover {
  background: var(--gold-tint);
  color: var(--gold-deep);
}
.file-tree-link.is-active {
  background: var(--gold);
  color: #faf6ec;
}
.file-tree-link.is-active:hover { background: var(--gold-deep); }

/* Main file viewer */
.file-viewer {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.file-viewer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 22px;
  background: var(--bg-tint);
  border-bottom: 1px solid var(--line);
}
.file-viewer-path {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file-viewer-actions {
  display: flex;
  gap: 10px;
}
.file-viewer-body {
  padding: 28px 36px 40px;
  min-height: 480px;
}
.file-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  color: var(--ink-mute);
  font-family: var(--serif);
  font-style: italic;
  font-size: 16px;
}

/* ---------- Markdown rendering ---------- */
.md {
  font-family: var(--sans);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.65;
}
.md h1, .md h2, .md h3, .md h4 {
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 1.8em 0 0.6em;
}
.md h1:first-child, .md h2:first-child { margin-top: 0; }
.md h1 { font-size: 32px; line-height: 1.15; }
.md h2 { font-size: 24px; line-height: 1.2; }
.md h3 { font-size: 19px; line-height: 1.25; }
.md h4 { font-size: 16px; line-height: 1.3; font-weight: 700; letter-spacing: 0; }
.md p { margin: 0 0 1em; }
.md a { color: var(--gold); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.md a:hover { color: var(--gold-deep); }
.md strong { font-weight: 600; color: var(--ink); }
.md em { font-style: italic; }
.md ul, .md ol { padding-left: 1.4em; margin: 0 0 1em; }
.md li { margin: 0.2em 0; }
.md li::marker { color: var(--gold); }
.md blockquote {
  margin: 1.2em 0;
  padding: 0.6em 1.2em;
  border-left: 3px solid var(--gold);
  background: var(--gold-tint);
  font-family: var(--serif);
  font-style: italic;
  color: var(--ink-soft);
}
.md code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--bg-tint);
  border: 1px solid var(--line);
  padding: 0.1em 0.4em;
  border-radius: 3px;
  color: var(--gold-deep);
}
.md pre {
  font-family: var(--mono);
  font-size: 13px;
  background: #14110d;
  color: #ece4d3;
  padding: 18px 22px;
  border-radius: var(--radius-md);
  overflow: auto;
  line-height: 1.5;
  margin: 1.2em 0;
}
.md pre code {
  background: none;
  border: 0;
  padding: 0;
  color: inherit;
  font-size: inherit;
}
.md hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2em 0;
}
.md table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 1.2em 0;
  border: 1px solid var(--line);
  background: var(--bg-elev);
}
.md th, .md td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.md th {
  background: var(--bg-tint);
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.md tr:last-child td { border-bottom: 0; }
.md img { max-width: 100%; border-radius: var(--radius-md); margin: 1em 0; }

/* ---------- Slide deck landing card list ---------- */
.deck-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}
.deck-item {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 20px 24px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.deck-item:hover {
  border-color: var(--gold);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.deck-num {
  flex: 0 0 56px;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  font-size: 32px;
  color: var(--gold);
  line-height: 1;
}
.deck-meta { flex: 1 1 auto; min-width: 0; }
.deck-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.25;
  margin: 0 0 4px;
  color: var(--ink);
}
.deck-sub {
  font-size: 13px;
  color: var(--ink-mute);
  margin: 0;
}
.deck-arrow {
  flex: 0 0 auto;
  color: var(--ink-mute);
  transition: color 0.15s ease, transform 0.15s ease;
}
.deck-item:hover .deck-arrow {
  color: var(--gold);
  transform: translateX(4px);
}

/* ---------- Toolbar/utility ---------- */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 14px 18px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  margin: 24px 0;
  font-size: 13px;
}
.toolbar b { color: var(--ink); }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding: 4px 10px;
  background: var(--bg-tint);
  border: 1px solid var(--line);
  border-radius: 999px;
}
.tag-accent { color: var(--gold); background: var(--gold-tint); border-color: rgba(122,23,34,0.18); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .container, .container-narrow { padding: 0 20px; }
  .header-inner { height: 64px; }
  .hero { padding: 48px 0 40px; }
  .case-detail {
    grid-template-columns: 1fr;
  }
  .case-aside {
    position: static;
    max-height: none;
  }
  .file-viewer-body { padding: 20px; }
}