/* ═══════════════════════════════════════════════════════════════════
   Centinela design system tokens — mirror of ctl-landing/globals.css
   ═══════════════════════════════════════════════════════════════════ */

:root {
  /* Surfaces */
  --bg: #0a0d12;
  --bg-soft: #11151c;
  --bg-elev: #161b25;
  --bg-card: rgba(255, 255, 255, 0.025);

  /* Borders & dividers */
  --line: rgba(236, 232, 223, 0.08);
  --line-strong: rgba(236, 232, 223, 0.18);

  /* Ink (text) */
  --ink: #ece8df;
  --ink-mid: #a8a39a;
  --ink-lo: #6c7787;

  /* Brand */
  --primary: #3d5a80;
  --primary-glow: #6b8cb8;
  --primary-soft: #8aa6cf;
  --primary-shadow: rgba(107, 140, 184, 0.28);

  /* Status */
  --sage: #7eb09a;
  --terra: #d39073;
  --critical: #c96666;

  /* Shadow */
  --shadow-soft: 0 1px 0 rgba(61, 90, 128, 0.08);
  --shadow-drop: 0 18px 60px -20px rgba(0, 0, 0, 0.6);

  /* Fonts */
  --font-editorial: "Lora", Georgia, serif;
  --font-ui: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Layout */
  --container-max: 1200px;
  --container-lg: 1400px;
}

/* Fonts from Google Fonts loaded in base.html */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-ui);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

a {
  color: var(--primary-glow);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover {
  color: var(--primary-soft);
}

/* ═══ Typography ═══ */
h1, h2, h3, h4 {
  font-family: var(--font-editorial);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--ink);
}

h1 { font-size: clamp(2rem, 4.5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.75rem); }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

.kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-lo);
}

.kicker-glow {
  color: var(--primary-glow);
}

.underline-inline {
  text-decoration: underline;
  text-decoration-color: var(--primary-glow);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 6px;
}

code, pre, .mono {
  font-family: var(--font-mono);
  font-size: 0.875em;
}

p code {
  background: var(--bg-elev);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--line);
  font-size: 0.85em;
  color: var(--primary-soft);
}

/* ═══ Layout ═══ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.container-lg {
  max-width: var(--container-lg);
  margin: 0 auto;
  padding: 0 24px;
}

/* ═══ Header ═══ */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 13, 18, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--container-lg);
  margin: 0 auto;
}
/* Brand — mirror del header de ctl-landing (font Inter 24px w600, primary-glow) */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary-glow);
  font-family: var(--font-ui);
  font-size: 1.5rem;      /* text-2xl = 24px */
  font-weight: 600;
  line-height: 1;         /* leading-none */
  letter-spacing: 0;
  text-decoration: none;
  transition: color 0.15s ease;
}
.brand:hover {
  color: var(--primary-soft);
}
.brand-mark {
  width: 26px;
  height: 26px;
  color: var(--primary-glow);
  flex-shrink: 0;
}
.brand-name {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 1.5rem;
  letter-spacing: 0;
}
.brand-workshop {
  color: var(--ink-mid);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 400;
  margin-left: 4px;
  padding-left: 12px;
  border-left: 1px solid var(--line);
  line-height: 1;
  padding-top: 2px;   /* alinear con la baseline visual del brand */
}
.nav-links {
  display: none;
  gap: 24px;
  align-items: center;
  font-size: 14px;
}
.nav-links a {
  color: var(--ink-mid);
}
.nav-links a:hover, .nav-links a.active {
  color: var(--ink);
}
@media (min-width: 768px) {
  .nav-links { display: flex; }
}

/* ═══ Lesson strip (persistent nav) ═══ */
.lesson-strip {
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
}
.lesson-strip-inner {
  max-width: var(--container-lg);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  overflow-x: auto;
  scrollbar-width: none;
}
.lesson-strip-inner::-webkit-scrollbar {
  display: none;
}
.lesson-strip-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-lo);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  white-space: nowrap;
  flex-shrink: 0;
}
.lesson-strip-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 6px;
  color: var(--ink-mid);
  border: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 12px;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.15s ease;
}
.lesson-strip-item:hover {
  border-color: var(--line-strong);
  color: var(--ink);
}
.lesson-strip-item.active {
  color: var(--primary-glow);
  border-color: var(--primary-glow);
  background: rgba(107, 140, 184, 0.06);
}
.lesson-strip-num {
  font-weight: 600;
}
.lesson-strip-title {
  display: none;
}
@media (min-width: 900px) {
  .lesson-strip-title { display: inline; }
}

/* ═══ Buttons ═══ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 8px;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease;
  box-shadow: var(--shadow-soft);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover {
  transform: translateY(-1px);
}
.btn-primary {
  background: var(--primary-glow);
  color: var(--bg);
}
.btn-primary:hover {
  background: var(--primary-soft);
  color: var(--bg);
}
.btn-ghost {
  border-color: var(--line-strong);
  color: var(--ink);
  background: transparent;
}
.btn-ghost:hover {
  border-color: var(--primary-glow);
  color: var(--primary-glow);
}
.btn-sm {
  padding: 8px 14px;
  font-size: 13px;
}

/* ═══ Card ═══ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: border-color 0.2s ease;
}
.card:hover {
  border-color: rgba(107, 140, 184, 0.4);
}
.card-title {
  font-family: var(--font-editorial);
  font-size: 1.5rem;
  margin-bottom: 12px;
}
.card-body {
  color: var(--ink-mid);
  font-size: 0.95rem;
}

/* ═══ Hero ═══ */
.hero {
  position: relative;
  padding: 96px 24px 64px;
  border-radius: 16px;
  border: 1px solid var(--line);
  margin: 32px auto;
  max-width: var(--container-lg);
  overflow: hidden;
  background: radial-gradient(1200px 700px at 50% -20%, rgba(107, 140, 184, 0.15), transparent 60%);
}
.hero h1 {
  max-width: 900px;
  margin-bottom: 24px;
}
.hero-lead {
  max-width: 700px;
  color: var(--ink-mid);
  font-size: 1.15rem;
  line-height: 1.6;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}
.hero-eyebrow .mascot {
  font-size: 24px;
}

/* Stat line */
.stat-line {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  padding: 32px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 48px 0;
}
.stat-line dt {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-lo);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  margin-bottom: 6px;
}
.stat-line dd {
  font-family: var(--font-editorial);
  font-size: 1.5rem;
  color: var(--ink);
}

/* ═══ Prompt block (copy-to-clipboard) ═══ */
.prompt-block {
  background: var(--bg-elev);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  margin: 24px 0;
  overflow: hidden;
}
.prompt-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--line);
}
.prompt-block-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-lo);
  text-transform: uppercase;
  letter-spacing: 0.22em;
}
.prompt-copy-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--ink-mid);
  padding: 6px 12px;
  border-radius: 6px;
  font-family: var(--font-ui);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.prompt-copy-button:hover {
  border-color: var(--primary-glow);
  color: var(--primary-glow);
}
.prompt-copy-button.copied {
  border-color: var(--sage);
  color: var(--sage);
}
.prompt-copy-button svg {
  width: 14px;
  height: 14px;
}
.prompt-block-body {
  padding: 20px;
  overflow-x: auto;
  background: var(--bg);
}
.prompt-block-body code {
  color: var(--ink);
  white-space: pre-wrap;
  word-wrap: break-word;
  font-size: 13px;
  line-height: 1.6;
}

/* ═══ Checklist ═══ */
.checklist {
  background: var(--bg-elev);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  padding: 24px;
  margin: 24px 0;
}
.checklist-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.checklist-title {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-lo);
  text-transform: uppercase;
  letter-spacing: 0.22em;
}
.checklist-progress {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--primary-glow);
  font-weight: 500;
}
.checklist-reset {
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--ink-mid);
  padding: 4px 10px;
  border-radius: 6px;
  font-family: var(--font-ui);
  font-size: 11px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.checklist-reset:hover {
  border-color: var(--critical);
  color: var(--critical);
}
.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  cursor: pointer;
  border-bottom: 1px solid var(--line);
}
.checklist-item:last-child {
  border-bottom: none;
}
.checklist-item input[type="checkbox"] {
  appearance: none;
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--line-strong);
  border-radius: 4px;
  margin-top: 2px;
  cursor: pointer;
  flex-shrink: 0;
  position: relative;
  background: var(--bg);
  transition: all 0.15s ease;
}
.checklist-item input[type="checkbox"]:hover {
  border-color: var(--primary-glow);
}
.checklist-item input[type="checkbox"]:checked {
  background: var(--primary-glow);
  border-color: var(--primary-glow);
}
.checklist-item input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 1px;
  width: 5px;
  height: 9px;
  border: solid var(--bg);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.checklist-item.checked label {
  color: var(--ink-lo);
  text-decoration: line-through;
}
.checklist-item label {
  color: var(--ink);
  cursor: pointer;
  flex: 1;
  line-height: 1.5;
  font-size: 15px;
}

/* ═══ Lesson pagination ═══ */
.lesson-pagination {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 32px 0;
  align-items: center;
}
.lesson-pagination-prev,
.lesson-pagination-next {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.lesson-pagination-next {
  text-align: right;
  align-items: flex-end;
}
.lesson-pagination-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-lo);
  text-transform: uppercase;
  letter-spacing: 0.22em;
}
.lesson-pagination-link {
  color: var(--ink);
  font-weight: 500;
}
.lesson-pagination-link:hover {
  color: var(--primary-glow);
}
.lesson-pagination-center a {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-mid);
  text-transform: uppercase;
  letter-spacing: 0.22em;
}

/* ═══ Lesson body ═══ */
.lesson-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 32px 0 16px;
}
.lesson-eyebrow-mascot {
  font-size: 20px;
}
.lesson-eyebrow-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--primary-glow);
  letter-spacing: 0.06em;
}
.lesson-meta {
  display: flex;
  gap: 24px;
  color: var(--ink-lo);
  font-family: var(--font-mono);
  font-size: 12px;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
.lesson-section {
  margin: 48px 0;
}
.lesson-section h2 {
  margin-bottom: 16px;
  font-size: 1.75rem;
}
.lesson-section h3 {
  margin: 24px 0 12px;
  font-family: var(--font-ui);
  font-weight: 600;
  color: var(--primary-glow);
  font-size: 1.1rem;
}
.lesson-section p {
  margin: 12px 0;
  color: var(--ink-mid);
  max-width: 65ch;
}
.lesson-section ul, .lesson-section ol {
  color: var(--ink-mid);
  padding-left: 24px;
  margin: 12px 0;
  max-width: 65ch;
}
.lesson-section li {
  margin: 6px 0;
}
.lesson-section pre {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 20px;
  overflow-x: auto;
  margin: 16px 0;
}
.lesson-section pre code {
  color: var(--ink);
  font-size: 13px;
}
.lesson-section blockquote {
  border-left: 3px solid var(--primary-glow);
  padding-left: 20px;
  margin: 20px 0;
  color: var(--ink-mid);
  font-style: italic;
}
.lesson-section details {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 16px 0;
}
.lesson-section summary {
  cursor: pointer;
  color: var(--primary-glow);
  font-weight: 500;
  user-select: none;
}

/* Notas para el instructor — deliberadamente discretas.
   El participante las ignora; el instructor las abre si quiere.  */
.lesson-section details.instructor-note {
  background: transparent;
  border: 1px dashed var(--line-strong);
  border-radius: 6px;
  padding: 10px 16px;
  margin: 20px 0;
  opacity: 0.75;
  transition: opacity 0.2s ease;
}
.lesson-section details.instructor-note:hover,
.lesson-section details.instructor-note[open] {
  opacity: 1;
}
.lesson-section details.instructor-note summary {
  color: var(--ink-lo);
  font-size: 12px;
  font-family: var(--font-mono);
  font-weight: 400;
  letter-spacing: 0.02em;
  text-transform: none;
}
.lesson-section details.instructor-note[open] summary {
  color: var(--ink-mid);
  margin-bottom: 10px;
}
.lesson-section details.instructor-note > *:not(summary) {
  font-size: 14px;
  color: var(--ink-mid);
}

/* Fastrack — escape hatch para participante con poco tiempo.
   Más visible que instructor-note; visualmente distinta.  */
.lesson-section details.fastrack {
  background: linear-gradient(135deg, rgba(211, 144, 115, 0.06), rgba(211, 144, 115, 0.02));
  border: 1px solid rgba(211, 144, 115, 0.3);
  border-radius: 10px;
  padding: 14px 20px;
  margin: 32px 0 16px;
}
.lesson-section details.fastrack summary {
  color: var(--terra);
  font-weight: 500;
  font-size: 14px;
  font-family: var(--font-ui);
  letter-spacing: normal;
  text-transform: none;
}
.lesson-section details.fastrack[open] summary {
  margin-bottom: 12px;
  border-bottom: 1px dashed rgba(211, 144, 115, 0.25);
  padding-bottom: 10px;
}
.lesson-section details.fastrack > *:not(summary) {
  font-size: 14.5px;
  color: var(--ink-mid);
}
.lesson-section details.fastrack code {
  background: var(--bg);
  border-color: rgba(211, 144, 115, 0.2);
  color: var(--terra);
}
.lesson-section details.fastrack pre {
  border-color: rgba(211, 144, 115, 0.2);
}
.lesson-section table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}
.lesson-section th, .lesson-section td {
  border: 1px solid var(--line);
  padding: 10px 14px;
  text-align: left;
}
.lesson-section th {
  background: var(--bg-elev);
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-lo);
  font-weight: 400;
}

/* ═══ Lesson index (grid) ═══ */
.lesson-index {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 32px 0;
  list-style: none;
  padding: 0;
}
@media (min-width: 768px) {
  .lesson-index { grid-template-columns: repeat(2, 1fr); }
}
.lesson-index-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 12px;
  transition: border-color 0.2s ease;
}
.lesson-index-item:hover {
  border-color: var(--primary-glow);
}
.lesson-index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--primary-glow);
  letter-spacing: 0.22em;
  text-transform: uppercase;
}
.lesson-index-title {
  font-family: var(--font-editorial);
  font-size: 1.25rem;
  color: var(--ink);
}
.lesson-index-lead {
  color: var(--ink-mid);
  font-size: 14px;
}

/* ═══ Footer ═══ */
.footer {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  padding: 48px 24px;
  margin-top: 96px;
}
.footer-inner {
  max-width: var(--container-lg);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}
.footer-brand {
  color: var(--ink-mid);
  font-size: 14px;
}
.footer-links {
  display: flex;
  gap: 24px;
  font-size: 13px;
}
.footer-links a {
  color: var(--ink-mid);
}
.footer-links a:hover {
  color: var(--primary-glow);
}

/* ═══ Mermaid ═══ */
.mermaid {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 32px 24px;
  margin: 32px 0;
  overflow-x: auto;
  text-align: center;
}
.mermaid svg {
  max-width: 100%;
  height: auto;
}
/* Mermaid a veces inyecta font family inline; forzamos el nuestro */
.mermaid .nodeLabel, .mermaid .edgeLabel {
  font-family: var(--font-ui) !important;
}
.mermaid .cluster-label .nodeLabel {
  font-family: var(--font-editorial) !important;
  font-weight: 400;
}

/* ═══ Utility ═══ */
.mt-0 { margin-top: 0; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mb-8 { margin-bottom: 32px; }
.text-mid { color: var(--ink-mid); }
.text-lo { color: var(--ink-lo); }
.text-glow { color: var(--primary-glow); }