/* eInventiva Academy · sistema visual (handoff de diseño, sept. 2026)
   Minimalista, editorial y premium. Los componentes leen solo tokens. */
@import url("fonts.css");

:root {
  --color-bg: #FAFAF8;            --color-surface: #FFFFFF;
  --color-surface-muted: #F4F3EF; --color-text: #17191A;
  --color-muted: #5B5F61;         --color-border: #E3E2DD;
  --color-border-strong: #8E918F;
  --color-brand: #0F4C5C;         --color-brand-strong: #0A3642;
  --color-brand-soft: #E6F0F2;
  --color-accent: #C2562F;        --color-accent-text: #9A3F1F;
  --color-accent-soft: #FBEDE7;   --color-accent-softer: #FDF7F4;
  /* Tonos de avatar (fondo / texto), armonizados con la marca */
  --avatar-0-bg: #E6F0F2; --avatar-0-fg: #0A3642;
  --avatar-1-bg: #FBEDE7; --avatar-1-fg: #9A3F1F;
  --avatar-2-bg: #E4F1EA; --avatar-2-fg: #1E5A3C;
  --avatar-3-bg: #F6EDD9; --avatar-3-fg: #6E4800;
  --avatar-4-bg: #EFE8F3; --avatar-4-fg: #5A3470;
  --avatar-5-bg: #E8ECF1; --avatar-5-fg: #33475E;
  --color-focus: #2E6BE6;
  --color-success: #1E6B45;       --color-success-soft: #E7F2EC;
  --color-warning: #8A5A00;       --color-warning-soft: #FBF0D9;  --color-warning-text: #6E4800;
  --color-danger: #B3261E;        --color-danger-soft: #FBE9E7;
  --color-reading: #26292B;       --color-secondary-text: #3C4042;
  --color-button-border: #CFCDC6; --color-disabled: #8A8D8E;

  --space-1: 4px;  --space-2: 8px;  --space-3: 12px; --space-4: 16px;
  --space-5: 24px; --space-6: 40px; --space-7: 64px;

  --radius-1: 6px;
  --radius-2: 12px;
  --shadow-1: 0 1px 2px rgba(23, 25, 26, .06);
  --shadow-2: 0 12px 32px -12px rgba(23, 25, 26, .18), 0 2px 6px rgba(23, 25, 26, .05);

  --font-heading: "Newsreader", Georgia, serif;
  --font-body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --measure: 680px;
  --wide: 880px;
  --target-min: 44px;
  --topbar-h: 57px;
  --sidebar-w: 316px;
}
/* Tonos de sección: fondo muy suave + mosaico del ícono (mismos matices que los avatares) */
:root {
  --tone-slate-bg: #F3F5F8;      --tone-slate-tile: #E3E8EF;      --tone-slate-fg: #33475E;
  --tone-lavender-bg: #F7F4F9;   --tone-lavender-tile: #EBE2F1;   --tone-lavender-fg: #5A3470;
  --tone-teal-bg: #EEF5F6;       --tone-teal-tile: #DCEBEE;       --tone-teal-fg: #0A3642;
  --tone-green-bg: #F1F7F3;      --tone-green-tile: #DDEEE4;      --tone-green-fg: #1E5A3C;
  --tone-amber-bg: #FBF4E4;      --tone-amber-tile: #F4E4BE;      --tone-amber-fg: #6E4800;
  --tone-terracotta-bg: #FCF5F1; --tone-terracotta-tile: #F7E1D6; --tone-terracotta-fg: #9A3F1F;
}
[data-theme="dark"] {
  --tone-slate-bg: #1A1F25;      --tone-slate-tile: #262F3A;      --tone-slate-fg: #C3CFDD;
  --tone-lavender-bg: #1F1A24;   --tone-lavender-tile: #33243D;   --tone-lavender-fg: #D6BDE6;
  --tone-teal-bg: #142227;       --tone-teal-tile: #16373F;       --tone-teal-fg: #B9DCE3;
  --tone-green-bg: #152219;      --tone-green-tile: #1B3A2B;      --tone-green-fg: #A8DBBF;
  --tone-amber-bg: #231E13;      --tone-amber-tile: #3D3017;      --tone-amber-fg: #EBCB8B;
  --tone-terracotta-bg: #241A16; --tone-terracotta-tile: #42261B; --tone-terracotta-fg: #F2B79E;
}
[data-theme="dark"] {
  --avatar-0-bg: #16373F; --avatar-0-fg: #B9DCE3;
  --avatar-1-bg: #42261B; --avatar-1-fg: #F2B79E;
  --avatar-2-bg: #1B3A2B; --avatar-2-fg: #A8DBBF;
  --avatar-3-bg: #3D3017; --avatar-3-fg: #EBCB8B;
  --avatar-4-bg: #33243D; --avatar-4-fg: #D6BDE6;
  --avatar-5-bg: #262F3A; --avatar-5-fg: #C3CFDD;
  --color-bg: #111416; --color-surface: #181C1F; --color-surface-muted: #1F2427;
  --color-text: #ECEDEA; --color-muted: #A3A8A9; --color-border: #2C3236;
  --color-brand: #6FB3C2; --color-brand-strong: #9BCBD6; --color-brand-soft: #13303A;
  --color-accent: #E08A64; --color-accent-text: #EFA283; --color-focus: #7AA2FF;
  --color-success: #6CC495; --color-warning: #E0B458; --color-danger: #F08A80;
  --color-reading: #DADCD8; --color-secondary-text: #C3C6C4;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--color-bg); color: var(--color-text);
  font-family: var(--font-body); font-size: 16px; line-height: 1.5;
  overflow-x: hidden; -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; height: auto; }
a { color: var(--color-brand); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--color-brand-strong); }
h1, h2, h3 { font-family: var(--font-heading); font-weight: 500; color: var(--color-text); }
h1 { font-size: clamp(34px, 4.4vw, 48px); line-height: 1.09; letter-spacing: -0.02em; margin: 0 0 var(--space-4); }
h2 { font-size: clamp(26px, 2.6vw, 30px); line-height: 1.2; letter-spacing: -0.01em; margin: 0 0 var(--space-4); }
h3 { font-size: 22px; line-height: 1.27; margin: var(--space-5) 0 var(--space-3); }
h4 { font-family: var(--font-body); font-size: 17px; line-height: 1.4; font-weight: 600; margin: var(--space-4) 0 var(--space-2); }
code { font-family: var(--font-mono); font-size: .9em; color: var(--color-brand-strong); background: var(--color-surface-muted); padding: 1px 5px; border-radius: 4px; overflow-wrap: anywhere; }
table { border-collapse: collapse; width: 100%; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 14px 16px; border-top: 1px solid var(--color-border); vertical-align: top; }
thead th { border-top: 0; background: var(--color-surface-muted); color: var(--color-muted); font-size: 13px; font-weight: 500; }
caption { text-align: left; font-size: 13px; font-weight: 500; color: var(--color-muted); padding: 12px 16px; caption-side: top; }
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; border-radius: 4px; }
[tabindex="-1"]:focus, [tabindex="-1"]:focus-visible { outline: none; }
::selection { background: var(--color-brand-soft); }

.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: var(--space-3); top: -60px; z-index: 100; background: var(--color-brand); color: #fff; padding: var(--space-2) var(--space-4); border-radius: var(--radius-1); }
.skip-link:focus { top: var(--space-2); color: #fff; }

/* Etiqueta: 13 px, mayúsculas, espaciado */
.label, .module-eyebrow, .hero-eyebrow, .tool-kind, .outline-track {
  font-family: var(--font-body); font-size: 13px; font-weight: 500; text-transform: uppercase; letter-spacing: .06em; color: var(--color-accent-text); margin: 0;
}

/* ---------- Logotipo ---------- */
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--color-text); min-height: var(--target-min); }
.brand-mark { width: 28px; height: 28px; border-radius: 7px; background: var(--color-brand); color: #fff; display: grid; place-items: center; font-family: var(--font-heading); font-style: italic; font-size: 19px; line-height: 1; flex: none; }
.brand-text { font-weight: 600; font-size: 16px; white-space: nowrap; }
.brand-text small { font-weight: 400; color: var(--color-muted); font-size: 16px; margin-left: 4px; }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  min-height: var(--target-min); padding: 0 18px; border-radius: var(--radius-1);
  border: 1px solid var(--color-button-border); background: var(--color-surface); color: var(--color-text);
  font: inherit; font-weight: 500; font-size: 15px; cursor: pointer; text-decoration: none; white-space: nowrap;
  transition: background-color .15s, border-color .15s, color .15s;
}
.btn:hover { background: var(--color-surface-muted); color: var(--color-text); }
.btn-primary { background: var(--color-brand); border-color: var(--color-brand); color: #fff; }
.btn-primary:hover { background: var(--color-brand-strong); border-color: var(--color-brand-strong); color: #fff; }
.btn-text { border-color: transparent; background: transparent; color: var(--color-brand); padding: 0 10px; }
.btn-text:hover { background: var(--color-brand-soft); color: var(--color-brand-strong); }
.btn-success { background: var(--color-success); border-color: var(--color-success); color: #fff; }
.btn:disabled, .btn[aria-disabled="true"] { background: var(--color-surface-muted); border-color: var(--color-border); color: var(--color-disabled); cursor: not-allowed; }
.btn[aria-pressed="true"] { background: var(--color-success-soft); border-color: transparent; color: var(--color-success); }

/* ---------- Insignias (símbolo + texto + color) ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 6px; min-height: 26px; padding: 0 10px; border-radius: 999px;
  font-size: 13px; font-weight: 500; line-height: 1; white-space: nowrap;
  background: var(--color-surface); border: 1px solid var(--color-button-border); color: var(--color-secondary-text);
  font-variant-numeric: tabular-nums;
}
.badge-reading { background: var(--color-brand-soft); border-color: transparent; color: var(--color-brand-strong); }
.badge-done { background: var(--color-success-soft); border-color: transparent; color: var(--color-success); }
.badge-approved { background: var(--color-success); border-color: transparent; color: #fff; }
.badge-review { background: var(--color-warning-soft); border-color: transparent; color: var(--color-warning-text); }
.badge-hard, .badge-changes { background: var(--color-danger-soft); border-color: transparent; color: var(--color-danger); }
.badge-lab { background: var(--color-accent-soft); border-color: transparent; color: var(--color-accent-text); }
/* Dificultad: 4 barras, 1 a 4 rellenas */
.badge.badge-diff { border-radius: var(--radius-1); gap: 8px; background: var(--color-surface); border-color: var(--color-button-border); color: var(--color-secondary-text); }
.badge-diff .bars { display: inline-flex; gap: 2px; align-items: flex-end; }
.badge-diff .bars i { width: 4px; height: 10px; border-radius: 1px; background: var(--color-border); }
.badge-diff[data-level="1"] .bars i:nth-child(-n+1),
.badge-diff[data-level="2"] .bars i:nth-child(-n+2),
.badge-diff[data-level="3"] .bars i:nth-child(-n+3),
.badge-diff[data-level="4"] .bars i:nth-child(-n+4) { background: var(--color-brand); }
.badge-easy, .badge-working, .badge-capstone { border-radius: var(--radius-1); }

/* ---------- Encabezado del curso (barra fija) ---------- */
.course-header {
  position: sticky; top: 0; z-index: 40; height: var(--topbar-h);
  display: flex; align-items: center; gap: var(--space-3); padding: 0 clamp(12px, 2.4vw, 24px);
  background: rgba(250, 250, 248, .92); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.topbar-title { color: var(--color-muted); font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; flex: 1; }
.topbar-links { display: flex; align-items: center; gap: var(--space-1); }
.course-header .outline-toggle { display: none; }
.outline-toggle .burger { display: inline-block; width: 16px; height: 2px; background: currentColor; box-shadow: 0 -5px 0 currentColor, 0 5px 0 currentColor; margin-right: 4px; }

/* ---------- Menú de usuario ---------- */
.user-area { display: flex; align-items: center; }
.user-menu { position: relative; }
.user-menu summary { list-style: none; display: inline-flex; align-items: center; gap: 6px; min-height: var(--target-min); padding: 0 6px; border-radius: 999px; border: 1px solid transparent; cursor: pointer; color: var(--color-secondary-text); }
.user-menu summary:hover { border-color: var(--color-border); background: var(--color-surface); }
.user-menu summary::-webkit-details-marker { display: none; }
/* Avatar: foto de la persona o sus iniciales sobre un tono propio (el mismo
   nombre siempre da el mismo tono). Tamaños: sm 24, base 32, md 40, lg 64, xl 112. */
.avatar { --av: 32px; width: var(--av); height: var(--av); border-radius: 50%; background: var(--av-bg, var(--color-brand-soft)); color: var(--av-fg, var(--color-brand-strong)); display: inline-grid; place-items: center; font-size: calc(var(--av) * .4); font-weight: 600; letter-spacing: .02em; flex: none; overflow: hidden; line-height: 1; user-select: none; }
.avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }
.avatar.has-photo { background: var(--color-surface-muted); box-shadow: inset 0 0 0 1px rgb(0 0 0 / .06); }
.avatar-sm { --av: 24px; font-size: 10px; }
.avatar-md { --av: 40px; }
.avatar-lg { --av: 64px; font-family: var(--font-heading); font-weight: 500; font-size: 26px; box-shadow: 0 0 0 3px var(--color-surface), 0 0 0 4px var(--color-border); }
.avatar-xl { --av: 112px; font-family: var(--font-heading); font-weight: 500; font-size: 44px; box-shadow: 0 0 0 4px var(--color-surface), 0 0 0 5px var(--color-border), var(--shadow-2); }
.avatar[data-tone="0"] { --av-bg: var(--avatar-0-bg); --av-fg: var(--avatar-0-fg); }
.avatar[data-tone="1"] { --av-bg: var(--avatar-1-bg); --av-fg: var(--avatar-1-fg); }
.avatar[data-tone="2"] { --av-bg: var(--avatar-2-bg); --av-fg: var(--avatar-2-fg); }
.avatar[data-tone="3"] { --av-bg: var(--avatar-3-bg); --av-fg: var(--avatar-3-fg); }
.avatar[data-tone="4"] { --av-bg: var(--avatar-4-bg); --av-fg: var(--avatar-4-fg); }
.avatar[data-tone="5"] { --av-bg: var(--avatar-5-bg); --av-fg: var(--avatar-5-fg); }
/* Persona: avatar junto al nombre, con un dato secundario debajo */
.person { display: inline-flex; align-items: center; gap: 10px; min-width: 0; vertical-align: middle; }
.person > span:last-child { display: grid; min-width: 0; line-height: 1.3; }
.person small { color: var(--color-muted); font-size: 13px; overflow-wrap: anywhere; }
.avatar-stack { display: inline-flex; align-items: center; }
.avatar-stack .avatar { box-shadow: 0 0 0 2px var(--color-surface); }
.avatar-stack .avatar + .avatar { margin-left: -8px; }
.user-menu-panel { position: absolute; right: 0; top: calc(100% + 6px); z-index: 60; width: 240px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 10px; box-shadow: var(--shadow-2); padding: 6px; display: grid; }
.user-menu-panel p { margin: 0 0 6px; padding: 10px 12px; border-bottom: 1px solid var(--color-border); font-size: 14px; }
.user-menu-panel .menu-head { display: flex; align-items: center; gap: 12px; margin: 0 0 6px; padding: 10px 12px 12px; border-bottom: 1px solid var(--color-border); font-size: 14px; }
.user-menu-panel .menu-head span:last-child { display: grid; min-width: 0; }
.user-menu-panel .menu-head small { color: var(--color-muted); overflow-wrap: anywhere; }
.user-menu-panel a, .user-menu-panel button { display: flex; align-items: center; gap: 10px; min-height: 44px; padding: 0 12px; border-radius: var(--radius-1); text-decoration: none; color: var(--color-text); font: inherit; font-size: 15px; background: none; border: 0; text-align: left; cursor: pointer; width: 100%; }
.user-menu-panel a:hover, .user-menu-panel button:hover { background: var(--color-surface-muted); }
.user-menu-panel [data-logout] { color: var(--color-danger); border-top: 1px solid var(--color-border); border-radius: 0 0 var(--radius-1) var(--radius-1); margin-top: 6px; }

/* ---------- Estructura: índice lateral + lector ---------- */
.layout { display: grid; grid-template-columns: var(--sidebar-w) minmax(0, 1fr); min-height: calc(100vh - var(--topbar-h)); }
.course-outline {
  position: sticky; top: var(--topbar-h); height: calc(100vh - var(--topbar-h)); overflow-y: auto;
  background: var(--color-bg); border-right: 1px solid var(--color-border); padding: var(--space-5) var(--space-4) var(--space-6);
}
.drawer-head { display: none; }
.side-nav { display: grid; gap: 2px; margin-bottom: var(--space-5); }
.side-nav a { display: flex; align-items: center; gap: 10px; min-height: 40px; padding: 0 10px; border-radius: var(--radius-1); color: var(--color-secondary-text); text-decoration: none; font-size: 15px; }
.side-nav a:hover { background: var(--color-surface-muted); color: var(--color-text); }
.side-nav a[aria-current="page"] { background: var(--color-brand-soft); color: var(--color-brand-strong); font-weight: 600; }
.progress-panel { padding: 0 10px var(--space-5); border-bottom: 1px solid var(--color-border); margin-bottom: var(--space-4); }
.progress-panel h2 { font-family: var(--font-body); font-size: 13px; font-weight: 500; color: var(--color-muted); margin: 0 0 var(--space-2); }
.progress-summary { font-size: 13px; color: var(--color-muted); margin: var(--space-2) 0 var(--space-3); font-variant-numeric: tabular-nums; }
progress { appearance: none; -webkit-appearance: none; width: 100%; height: 6px; border: 0; border-radius: 999px; background: var(--color-border); overflow: hidden; }
progress::-webkit-progress-bar { background: var(--color-border); border-radius: 999px; }
progress::-webkit-progress-value { background: var(--color-brand); border-radius: 999px; }
progress::-moz-progress-bar { background: var(--color-brand); border-radius: 999px; }
.progress-panel .btn { width: 100%; }

.outline-group > h2 { font-family: var(--font-body); font-size: 13px; font-weight: 500; color: var(--color-muted); text-transform: uppercase; letter-spacing: .06em; margin: var(--space-5) 10px var(--space-2); }
.outline-route { border-bottom: 1px solid var(--color-border); }
.outline-route > summary { list-style: none; display: flex; align-items: center; gap: var(--space-2); min-height: 48px; padding: 0 10px; cursor: pointer; font-weight: 600; font-size: 14px; color: var(--color-text); }
.outline-route > summary::-webkit-details-marker { display: none; }
.outline-route > summary .count { margin-left: auto; font-weight: 400; color: var(--color-muted); font-size: 13px; font-variant-numeric: tabular-nums; }
.outline-route > summary .chev { transition: transform .2s; color: var(--color-muted); font-size: 12px; }
.outline-route[open] > summary .chev { transform: rotate(180deg); }
.outline-route ol { list-style: none; margin: 0 0 var(--space-3); padding: 0; }
.outline-group a { display: flex; gap: 10px; align-items: center; min-height: 44px; padding: 6px 10px; border-radius: var(--radius-1); text-decoration: none; color: var(--color-text); font-size: 14px; line-height: 1.3; }
.outline-group a:hover { background: var(--color-surface-muted); }
.outline-group a[aria-current="page"] { background: var(--color-brand-soft); font-weight: 600; }
.outline-num { flex: 0 0 34px; color: var(--color-muted); font-variant-numeric: tabular-nums; font-size: 13px; font-weight: 400; }
.outline-status { flex: none; width: 18px; height: 18px; border-radius: 50%; border: 1.5px solid var(--color-border-strong); display: inline-grid; place-items: center; font-size: 11px; color: #fff; }
.outline-group a.is-done .outline-status { background: var(--color-success); border-color: var(--color-success); }
.outline-group a.is-done .outline-status::after { content: "✓"; }
.outline-group a[aria-current="page"] .outline-status { border: 5px solid var(--color-brand); background: var(--color-surface); }
.drawer-backdrop { display: none; }

main.reader { min-width: 0; padding: clamp(24px, 5vw, 56px) clamp(16px, 4vw, 48px) var(--space-7); }
main.reader:focus { outline: none; }
.view { max-width: 1040px; margin: 0 auto; }
.lesson { max-width: var(--wide); margin: 0 auto; }

/* ---------- Lector de lección ---------- */
.lesson-nav-top { display: flex; justify-content: space-between; gap: var(--space-2); font-size: 14px; color: var(--color-muted); max-width: var(--measure); margin: 0 auto var(--space-5); }
.lesson-nav-top a { text-decoration: none; }
.jump-links { display: none; }
.lesson article { color: var(--color-reading); }
.lesson article section { margin: var(--space-7) 0; }
/* Bloques de texto a 680 px; diagramas, rejillas, tablas, laboratorios y entrega a 880 px */
.lesson article > header, .lesson article section > * { max-width: var(--measure); margin-left: auto; margin-right: auto; }
.lesson article section > :is(figure, .first-principles-grid, .table-wrap, .lab-card, .practice-grid, .submission-panel) { max-width: none; }
.lesson article p, .lesson article li { font-size: 18px; line-height: 1.7; }
.lesson article li + li { margin-top: 6px; }

.module-header { margin-bottom: var(--space-6); }
.module-eyebrow { display: flex; align-items: center; gap: 12px; }
.module-eyebrow::before { content: ""; width: 28px; height: 2px; background: var(--color-accent); flex: none; }
.module-header h1 { margin: var(--space-3) 0 var(--space-4); max-width: 18ch; }
.lesson article .module-lede { font-size: clamp(18px, 1.7vw, 21px); line-height: 1.55; color: var(--color-secondary-text); margin: 0; }
.lesson-meta { display: flex; flex-wrap: wrap; gap: var(--space-5); border-top: 1px solid var(--color-border); margin-top: var(--space-5); padding-top: var(--space-4); font-size: 14px; color: var(--color-muted); font-variant-numeric: tabular-nums; }

/* Títulos de sección: número en itálica + línea terracota */
.sec-kicker { display: flex; align-items: center; gap: 12px; margin-bottom: var(--space-2); }
.sec-num { font-family: var(--font-heading); font-style: italic; font-size: 19px; color: var(--color-accent-text); font-variant-numeric: tabular-nums; }
.sec-kicker::after { content: ""; width: 40px; height: 1.5px; background: var(--color-accent); }
.lesson article h2 { margin-top: 0; }

/* Etiquetas de bloque con rombo */
.tool-kind, .block-label { display: inline-flex; align-items: center; gap: 8px; color: var(--color-brand); }
.tool-kind::before, .block-label::before { content: ""; width: 8px; height: 8px; background: var(--color-brand); transform: rotate(45deg); flex: none; }

/* 1. Diagrama */
figure.diagram-art { margin: 0 0 var(--space-5); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-2); padding: var(--space-4); }
.diagram-art img { display: block; width: 100%; max-width: 760px; margin: 0 auto; }
figcaption { font-size: 14px; line-height: 1.5; color: var(--color-muted); margin-top: var(--space-3); padding: 0 var(--space-2); }
figcaption .fig-label { font-weight: 600; color: var(--color-text); }

/* 2. «Dónde lo verás» */
.real-world-anchor [data-boundary] { color: var(--color-secondary-text); }

/* 3. Rejilla de 6 tarjetas */
.first-principles-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--space-3); counter-reset: card; margin: var(--space-5) 0; }
.first-principles-grid > div { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-2); padding: 20px; box-shadow: var(--shadow-1); counter-increment: card; }
.first-principles-grid h3 { font-family: var(--font-body); font-size: 15px; font-weight: 600; margin: 0 0 var(--space-2); display: flex; align-items: center; gap: 10px; }
.first-principles-grid h3::before { content: counter(card); width: 24px; height: 24px; border-radius: 50%; background: var(--color-brand-soft); color: var(--color-brand-strong); display: inline-grid; place-items: center; font-size: 12px; font-weight: 600; flex: none; }
.first-principles-grid > div:nth-child(6) h3::before { background: var(--color-accent-soft); color: var(--color-accent-text); }
.lesson article .card-lead { font-size: 15px; line-height: 1.5; font-weight: 500; color: var(--color-text); margin: 0 0 var(--space-2); }
.card-points { margin: 0; padding-left: 18px; }
.lesson article .card-points li { font-size: 14px; line-height: 1.5; color: var(--color-muted); }
.card-lead code, .card-points code { font-size: 13px; }
.teach-back { background: var(--color-surface); border: 1px solid var(--color-border); border-left: 3px solid var(--color-brand); border-radius: var(--radius-2); padding: var(--space-5); margin-top: var(--space-5); }
.teach-back h3 { margin-top: 0; font-size: 20px; }

/* 4. Tablas */
.table-wrap { overflow-x: auto; max-width: 100%; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-2); margin: var(--space-5) 0; }
.table-wrap table { min-width: 620px; }
.lesson .table-wrap td, .lesson .table-wrap th { font-size: 15px; line-height: 1.5; }
.table-wrap tbody tr:hover { background: var(--color-bg); }
.table-wrap table.rubric { min-width: 560px; margin: 0; }

/* 5. Trampa común */

.expert-upgrade h3, .make-it-yours h3 { font-size: 20px; }

/* 6. Opción múltiple */
.tool-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-2); padding: var(--space-5); margin: var(--space-5) auto; box-shadow: var(--shadow-1); }
.quiz-card { max-width: var(--measure); }
.quiz-fieldset, .lab-choice { border: 0; padding: 0; margin: var(--space-3) 0 0; min-width: 0; }
.quiz-fieldset legend, .lab-choice legend { float: left; width: 100%; font-weight: 500; font-size: 17px; line-height: 1.5; color: var(--color-text); margin-bottom: var(--space-3); }
.quiz-fieldset legend + *, .lab-choice legend + * { clear: both; }
.choice-row { display: grid; grid-template-columns: 20px minmax(0, 1fr) auto; gap: var(--space-3); align-items: center; min-height: 52px; padding: 12px 14px; border: 1px solid var(--color-border); border-radius: var(--radius-1); margin-bottom: var(--space-2); cursor: pointer; background: var(--color-surface); font-size: 16px; line-height: 1.45; color: var(--color-text); }
.choice-row input { width: 18px; height: 18px; margin: 0; accent-color: var(--color-brand); }
.choice-row:hover { border-color: var(--color-border-strong); }
.choice-row:has(input:checked) { border-color: var(--color-brand); background: var(--color-brand-soft); }
.choice-row.is-correct, .choice-row.is-correct:has(input:checked) { border-color: var(--color-success); background: var(--color-success-soft); }
.choice-row.is-wrong, .choice-row.is-wrong:has(input:checked) { border-color: var(--color-danger); background: var(--color-danger-soft); }
.choice-row .mark { font-size: 13px; font-weight: 500; white-space: nowrap; }
.choice-row.is-correct .mark { color: var(--color-success); }
.choice-row.is-wrong .mark { color: var(--color-danger); }
.quiz-actions { display: flex; gap: var(--space-2); margin-top: var(--space-3); }
.quiz-feedback { margin-top: var(--space-3); padding: 14px 16px; border-radius: var(--radius-1); font-size: 15px; line-height: 1.55; }
.quiz-feedback.is-correct { background: var(--color-success-soft); }
.quiz-feedback.is-wrong { background: var(--color-danger-soft); }

/* 7. Laboratorio */
.tool-card.lab-card { padding: 0; overflow: hidden; }
.lab-head { padding: var(--space-5) var(--space-5) 0; }
.lab-card h3 { margin: var(--space-2) 0; }
.lesson article .lab-card p, .lesson article .lab-card li { font-size: 16px; line-height: 1.6; }
.lab-steps h4 { font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--color-muted); font-weight: 500; }
.lab-steps ol { padding-left: 20px; margin: 0; }
.lab-metaphor { color: var(--color-muted); font-style: italic; }
.lab-form { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: var(--space-4); align-items: end; padding: var(--space-5); }
.lab-form .btn { grid-column: 1 / -1; justify-self: start; min-width: 184px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 14px; font-weight: 500; color: var(--color-text); }
.field input, .problem-answer textarea, .auth-form input, .auth-form textarea, .auth-form select, .submission-form input, .submission-form textarea, .filters input, .filters select {
  min-height: var(--target-min); padding: 0 12px; border: 1px solid var(--color-border-strong); border-radius: var(--radius-1);
  font: inherit; font-size: 16px; background: var(--color-surface); color: var(--color-text); width: 100%;
}
.problem-answer textarea, .submission-form textarea, .auth-form textarea { padding: 10px 12px; min-height: 96px; resize: vertical; }
.field input:focus, textarea:focus, .auth-form input:focus, .submission-form input:focus, .filters select:focus { border-color: var(--color-focus); outline: 2px solid var(--color-focus); outline-offset: 0; }
[aria-invalid="true"] { border: 1.5px solid var(--color-danger) !important; }
.lab-error { color: var(--color-danger); font-size: 13px; font-weight: 500; margin: 0; padding: 0 var(--space-5); }
.form-msg.lab-error { padding: 0; }
.lab-error::before { content: "⚠ "; }
.lab-output:not(:empty) { border-top: 1px solid var(--color-border); padding: var(--space-5); display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: var(--space-5); align-items: start; }
.lab-table { min-width: 0; }
.lab-table caption { padding: 0 0 var(--space-2); }
.lab-table th, .lab-table td { padding: 10px 0; font-size: 14px; border-top: 1px solid var(--color-border); background: none; color: var(--color-secondary-text); }
.lab-table th { font-weight: 400; padding-right: var(--space-3); }
.lab-table td { color: var(--color-text); font-weight: 500; }
.lesson article .lab-insight, .lab-insight { margin: 0; padding: 18px 20px; border-radius: var(--radius-1); background: var(--color-brand-soft); font-size: 16px; line-height: 1.55; color: var(--color-text); }
.lab-insight::before { display: block; font-size: 13px; font-weight: 500; letter-spacing: .06em; text-transform: uppercase; margin-bottom: 6px; color: var(--color-brand-strong); content: "Qué significa"; }
.lab-insight > strong:first-child { display: none; }
.lab-insight[data-tone="success"] { background: var(--color-success-soft); }
.lab-insight[data-tone="success"]::before { color: var(--color-success); content: "Qué significa · Vas bien"; }
.lab-insight[data-tone="warning"] { background: var(--color-warning-soft); }
.lab-insight[data-tone="warning"]::before { color: var(--color-warning-text); content: "Qué significa · Ajusta antes de avanzar"; }
.lab-insight[data-tone="danger"] { background: var(--color-danger-soft); }
.lab-insight[data-tone="danger"]::before { color: var(--color-danger); content: "Qué significa · Pierde dinero"; }
.lab-choice { padding: 0 var(--space-5) var(--space-5); }
.lab-hint { font-size: 14px; color: var(--color-muted); }
.lab-next, .lab-reflection, .lab-transfer { padding: 0 var(--space-5); }
.lab-next { border-top: 1px solid var(--color-border); padding-top: var(--space-4); }
.lab-next h4 { margin-top: 0; font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--color-muted); font-weight: 500; }
.lab-next ul { padding-left: 20px; }
.lab-transfer { padding-bottom: var(--space-5); }

/* 8. Práctica en niveles */
.practice-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr)); gap: var(--space-3); margin: var(--space-5) 0; }
[data-practice] { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-2); padding: 20px 22px; box-shadow: var(--shadow-1); display: flex; flex-direction: column; }
[data-practice] h3 { margin: var(--space-3) 0 var(--space-2); font-size: 19px; }
.lesson article [data-practice] p, .lesson article [data-practice] li { font-size: 16px; line-height: 1.6; }
details { margin-top: var(--space-3); }
summary { cursor: pointer; font-weight: 500; color: var(--color-brand); min-height: 44px; display: flex; align-items: center; list-style: none; }
summary::-webkit-details-marker { display: none; }
.lesson details > summary::after { content: "▾"; margin-left: 6px; transition: transform .2s; }
.lesson details[open] > summary::after { transform: rotate(180deg); }
.lesson details > :not(summary) { background: var(--color-surface-muted); border-radius: var(--radius-1); padding: 14px 16px; margin: var(--space-2) 0 0; }

/* 9. Proyecto y rúbrica */
.build-project .project-goal { font-weight: 500; color: var(--color-text); }
.lesson article [data-rubric] { font-size: 15px; line-height: 1.6; color: var(--color-secondary-text); background: var(--color-surface-muted); border-radius: var(--radius-1); padding: 14px 16px; }

/* Panel «Aplícalo a tu proyecto» */
.submission-panel { background: var(--color-surface); border: 1px solid var(--color-border); border-top: 3px solid var(--color-accent); border-radius: var(--radius-2); box-shadow: var(--shadow-1); overflow: hidden; margin-top: var(--space-6); }
.submission-head { background: var(--color-accent-softer); padding: var(--space-5); display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--space-4); align-items: start; border-bottom: 1px solid var(--color-border); }
.submission-head .label { margin-bottom: 6px; }
.submission-head h3 { margin: 0 0 var(--space-2); font-size: 24px; }
.lesson article .submission-head p { margin: 0; font-size: 15px; line-height: 1.6; color: var(--color-secondary-text); max-width: 60ch; }
.submission-body { padding: var(--space-5); }
.lesson article .submission-body p { font-size: 16px; line-height: 1.6; }
.review-box { margin: 0 0 var(--space-5); padding-bottom: var(--space-5); border-bottom: 1px solid var(--color-border); }
.reviewer { display: flex; gap: var(--space-3); align-items: center; margin-bottom: var(--space-3); }
.reviewer .avatar { --av: 36px; }
.me-head { display: flex; align-items: center; gap: var(--space-5); margin-bottom: var(--space-5); }
.me-head h1 { margin: 0 0 4px; }
.me-head p { margin: 0; }
.me-head .me-hint { margin-top: 4px; font-size: 14px; }
@media (max-width: 600px) { .me-head { gap: var(--space-4); } .me-head .avatar-lg { --av: 52px; font-size: 22px; } }
.reviewer small { display: block; color: var(--color-muted); font-size: 13px; }
.check-list { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-2); }
.lesson article .check-list li, .check-list li { font-size: 15px; color: var(--color-secondary-text); display: flex; gap: var(--space-2); align-items: baseline; margin: 0; }
.check-list li.is-met { color: var(--color-success); }
.submission-form { display: grid; gap: var(--space-4); }
.submission-form label { display: grid; gap: 6px; font-weight: 500; font-size: 14px; color: var(--color-text); }
.drop-zone input[type=file] { border: 1.5px dashed var(--color-button-border); background: var(--color-bg); padding: 22px 16px; min-height: 88px; cursor: pointer; }
.form-hint { font-size: 13px; color: var(--color-muted); font-weight: 400; }

/* Pie de lección */
.lesson-footer { display: grid; grid-template-columns: 1fr auto 1fr; gap: var(--space-3); align-items: center; border-top: 1px solid var(--color-border); margin-top: var(--space-7); padding-top: var(--space-5); }
.lesson-footer > :last-child { justify-self: end; }
.lesson-footer a.btn { border-color: transparent; background: transparent; color: var(--color-brand); }
.lesson-footer a.btn:hover { background: var(--color-brand-soft); }

/* ---------- Avisos ---------- */
.callout { border-radius: var(--radius-1); padding: 14px 16px; margin: var(--space-4) 0; background: var(--color-brand-soft); color: var(--color-brand-strong); font-size: 15px; }
.callout p { margin: 0; }
.callout-tip { background: var(--color-success-soft); color: var(--color-success); }
.callout-warning { background: var(--color-warning-soft); color: var(--color-warning-text); }
.callout-misconception, .callout-error { background: var(--color-danger-soft); color: var(--color-danger); }
.callout a { color: inherit; font-weight: 500; }

/* ---------- Problemas: preguntas activas ---------- */
[data-prompt] { background: var(--color-surface); border: 1px solid var(--color-border); border-left: 3px solid var(--color-brand); border-radius: var(--radius-2); padding: var(--space-5); margin: var(--space-4) auto; }
.problem-answer { display: grid; gap: var(--space-2); margin-top: var(--space-3); }
.problem-answer label { font-weight: 500; font-size: 14px; }
.problem-answer .btn { justify-self: start; }
[data-problem-feedback] { background: var(--color-success-soft); border-radius: var(--radius-1); padding: 14px 16px; margin-top: var(--space-3); }
.expert-name { font-weight: 500; }

/* ---------- Inicio del curso, tarjetas y rejillas ---------- */
.hero { padding: var(--space-4) 0 var(--space-6); border-bottom: 1px solid var(--color-border); }
.hero h1 { font-size: clamp(38px, 5vw, 56px); max-width: 16ch; margin-top: var(--space-3); }
.hero-promise { font-size: clamp(17px, 1.6vw, 20px); color: var(--color-secondary-text); max-width: 54ch; margin: 0 0 var(--space-5); line-height: 1.55; }
.guiding-question { margin: 0; padding-left: var(--space-4); border-left: 2px solid var(--color-accent); font-family: var(--font-heading); font-style: italic; font-size: 20px; color: var(--color-text); max-width: 54ch; }
.section-title { font-size: clamp(26px, 2.6vw, 30px); margin: var(--space-7) 0 var(--space-4); }
.path-choice { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); gap: var(--space-4); }
.path-card, .panel, .module-card, .stat, .readiness-card, .roadmap-track, .chapter {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-2); box-shadow: var(--shadow-1);
}
.path-card { padding: 28px; display: flex; flex-direction: column; gap: var(--space-3); }
.path-card h3 { margin: 0; }
.path-card p { margin: 0; color: var(--color-secondary-text); }
.path-card .btn { margin-top: auto; align-self: flex-start; }
.panel { padding: var(--space-5); }
.panel h2 { font-size: 22px; margin: 0 0 var(--space-3); }
.panel ul { margin: 0; padding-left: 20px; }
.home-panels { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); gap: var(--space-4); }
.course-map { margin: 0; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-2); padding: var(--space-4); }
.visual-models { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr)); gap: var(--space-4); margin: var(--space-4) 0 0; }
.visual-models figure { margin: 0; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-2); padding: var(--space-4); }

.track-tabs { display: flex; gap: var(--space-2); border-bottom: 1px solid var(--color-border); overflow-x: auto; }
.track-tabs [role="tab"] { min-height: var(--target-min); padding: 0 var(--space-4); border: 0; background: none; font: inherit; font-size: 15px; color: var(--color-muted); cursor: pointer; white-space: nowrap; box-shadow: inset 0 -2px 0 transparent; }
.track-tabs [role="tab"]:hover { box-shadow: inset 0 -2px 0 var(--color-button-border); }
.track-tabs [role="tab"][aria-selected="true"] { color: var(--color-text); font-weight: 500; box-shadow: inset 0 -2px 0 var(--color-brand); }
.track-panel { padding-top: var(--space-5); }
.track-promise { color: var(--color-muted); margin: 0 0 var(--space-4); }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); gap: var(--space-4); }
.module-card { display: flex; flex-direction: column; gap: var(--space-2); padding: 22px; text-decoration: none; color: var(--color-text); transition: box-shadow .2s; }
.module-card:hover { box-shadow: var(--shadow-2); color: var(--color-text); }
.module-card h3 { margin: var(--space-1) 0 0; font-size: 20px; }
.module-card p { margin: 0; font-size: 15px; color: var(--color-secondary-text); }
.module-card.is-current { border-color: var(--color-brand); }
.card-meta { display: flex; flex-wrap: wrap; gap: 6px; }
.concept-list { font-size: 14px; color: var(--color-muted); }
.problem-card dl { margin: var(--space-2) 0 0; display: grid; gap: 2px; font-size: 14px; }
.problem-card dt { font-weight: 600; color: var(--color-text); }
.problem-card dd { margin: 0 0 var(--space-2); color: var(--color-secondary-text); }

/* Indicadores, preparación y ruta (Mi avance, simuladores) */
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: var(--space-3); margin: var(--space-5) 0; }
.stat { padding: 18px 20px; display: grid; gap: 2px; }
.stat strong { font-size: 32px; font-weight: 500; color: var(--color-text); font-variant-numeric: tabular-nums; line-height: 1.1; }
.stat span { color: var(--color-muted); font-size: 14px; }
.readiness-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 290px), 1fr)); gap: var(--space-4); }
.readiness-card .check-list li { flex-wrap: wrap; }
.readiness-card { padding: var(--space-5); }
.readiness-card h3 { margin: 0 0 var(--space-3); font-size: 20px; }
.readiness-card.is-ready { border-top: 3px solid var(--color-success); }
.meter { height: 6px; border-radius: 999px; background: var(--color-border); overflow: hidden; }
.meter span { display: block; height: 100%; background: var(--color-brand); border-radius: 999px; }
.is-ready .meter span { background: var(--color-success); }
.readiness-status { margin: var(--space-3) 0; font-size: 15px; }
.roadmap-track { padding: 0 var(--space-5); margin: var(--space-3) 0; }
.roadmap-track summary { font-weight: 600; min-height: 52px; color: var(--color-text); }
.roadmap-track .table-wrap { border: 0; border-radius: 0; margin: 0 calc(-1 * var(--space-5)); }
.exam-bar { position: sticky; top: calc(var(--topbar-h) + 8px); z-index: 5; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-2); box-shadow: var(--shadow-2); padding: var(--space-3) var(--space-4); display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-2); align-items: center; }
.exam-timer { font-variant-numeric: tabular-nums; font-weight: 500; font-size: 20px; }
.exam-timer.is-low { color: var(--color-danger); }
.exam-bank .stat-row { grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }
.topic-table td:last-child { width: 30%; }
.exam-q { max-width: var(--measure); }

/* Certificación, glosario, recursos y filtros */
.cert-item { display: grid; grid-template-columns: 24px minmax(0, 1fr); gap: var(--space-3); padding: var(--space-4) 0; border-top: 1px solid var(--color-border); }
.crit-state { width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; font-size: 13px; font-weight: 700; margin-top: 1px; border: 1.5px solid var(--color-border-strong); color: var(--color-muted); }
.cert-item.is-verified .crit-state { background: var(--color-success); border-color: var(--color-success); color: #fff; }
.cert-item.is-progress .crit-state { border-color: var(--color-warning); color: var(--color-warning); background: var(--color-warning-soft); }
.crit-status { margin: 6px 0 4px; font-size: 14px; color: var(--color-muted); }
.cert-item.is-verified .crit-status { color: var(--color-success); font-weight: 500; }
.cert-item.is-progress .crit-status { color: var(--color-warning-text); }
.crit-summary { display: grid; gap: 8px; margin: var(--space-4) 0 var(--space-5); padding: var(--space-4) var(--space-5); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-2); }
.crit-summary .progress-line { display: flex; justify-content: space-between; gap: var(--space-3); font-size: 15px; font-variant-numeric: tabular-nums; }
.crit-summary p { margin: 0; }
.cert-item .links { font-size: 14px; color: var(--color-muted); }
.chip-links { display: flex; flex-wrap: wrap; gap: var(--space-2); margin: var(--space-3) 0 var(--space-5); }
.chip-links a, .chip { display: inline-flex; align-items: center; min-height: 32px; padding: 0 12px; border-radius: var(--radius-1); border: 1px solid var(--color-button-border); background: var(--color-surface); color: var(--color-secondary-text); font-size: 13px; text-decoration: none; }
.chip-links a:hover { border-color: var(--color-brand); color: var(--color-brand); }
.filters { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: end; margin-bottom: var(--space-4); }
.filters label { display: grid; gap: 6px; font-size: 14px; font-weight: 500; }
.filters select, .filters input { width: auto; min-width: 180px; }
.glossary-list dt { font-weight: 600; margin-top: var(--space-4); }
.glossary-list dd { margin: var(--space-1) 0 0; max-width: var(--measure); color: var(--color-secondary-text); }
.ec-note { font-size: 14px; color: var(--color-warning-text); }
.resource-card .resource-why { font-size: 14px; }

/* Formularios y utilidades */
.auth-form { display: grid; gap: var(--space-4); max-width: 560px; }
.auth-form label { display: grid; gap: 6px; font-weight: 500; font-size: 14px; }
.check-row { display: grid !important; grid-template-columns: 20px minmax(0, 1fr); gap: var(--space-2); align-items: start; font-weight: 400 !important; font-size: 15px; }
.check-row input { width: 18px !important; height: 18px; min-height: 0 !important; margin-top: 3px; accent-color: var(--color-brand); }
.form-msg { margin: 0; }
.btn-row { display: flex; flex-wrap: wrap; gap: var(--space-2); }

/* ---------- Logos de marca y certificaciones ---------- */
.brand-logo { width: 28px; height: 28px; object-fit: contain; flex: none; }
.cert-logos { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-4) var(--space-5); margin: 0 0 var(--space-3); }
.cert-logos figure { margin: 0; display: flex; align-items: center; gap: 10px; }
.cert-logos figcaption { margin: 0; padding: 0; font-size: 13px; color: var(--color-muted); line-height: 1.3; }
.cert-logo { height: 40px; width: auto; max-width: 140px; object-fit: contain; flex: none; }
.cert-logo.is-small { height: 24px; max-width: 96px; }
.cert-logo[src*="red-conocer"] { height: 60px; max-width: 110px; }
.cert-title .cert-logo[src*="red-conocer"] { height: 64px; }
.readiness-card h3 .cert-logo[src*="red-conocer"] { height: 44px; }
.logo-chip img[src*="red-conocer"] { height: 32px; }
.cert-logo.is-badge { height: 72px; max-width: 72px; }
.cert-title .cert-logo.is-badge { height: 88px; max-width: 88px; }
.readiness-card h3 .cert-logo.is-badge { height: 56px; max-width: 56px; }
.cert-logo.is-badge.is-small { height: 32px; max-width: 32px; }
.cert-title { display: flex; align-items: center; gap: var(--space-4); }
.cert-title > span { min-width: 0; }
.chip-links a img { height: 20px; width: auto; max-width: 64px; object-fit: contain; margin-right: 8px; }
.chip-links a img[src*="red-conocer"] { height: 26px; }
.cert-title .cert-logo { height: 44px; }
.logo-chip { display: inline-flex; align-items: center; gap: 8px; min-height: 36px; padding: 4px 10px 4px 6px; border-radius: var(--radius-1); border: 1px solid var(--color-border); background: var(--color-surface); font-size: 13px; color: var(--color-secondary-text); }
.logo-chip img { height: 24px; width: auto; max-width: 72px; object-fit: contain; }
/* Los logos de los certificadores vienen pensados para fondo claro. */
[data-theme="dark"] .cert-logo:not(.is-badge), [data-theme="dark"] .logo-chip img { background: #F4F5F3; border-radius: 4px; padding: 2px 4px; }
.readiness-card h3 { display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-3); }
.readiness-card h3 .cert-logo { height: 32px; max-width: 88px; }

/* ---------- Móvil: índice como cajón (< 960 px) ---------- */
@media (max-width: 959px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .course-header .outline-toggle { display: inline-flex; padding: 0 12px; }
  .topbar-links .hide-mobile { display: none; }
  .course-outline {
    position: fixed; top: 0; left: 0; bottom: 0; height: 100vh; z-index: 70; width: min(88vw, 340px);
    background: var(--color-surface); transform: translateX(-105%); transition: transform .22s ease; box-shadow: var(--shadow-2); padding-top: 0;
  }
  .course-outline.is-open { transform: none; }
  .drawer-head { display: flex; align-items: center; justify-content: space-between; min-height: var(--topbar-h); border-bottom: 1px solid var(--color-border); margin: 0 calc(-1 * var(--space-4)) var(--space-4); padding: 0 var(--space-4); position: sticky; top: 0; background: var(--color-surface); z-index: 1; }
  .drawer-backdrop { display: block; position: fixed; inset: 0; z-index: 65; background: rgba(23, 25, 26, .36); opacity: 0; pointer-events: none; transition: opacity .22s ease; }
  .drawer-backdrop.is-open { opacity: 1; pointer-events: auto; }
  .jump-links { display: flex; position: sticky; top: var(--topbar-h); z-index: 4; gap: var(--space-2); overflow-x: auto; background: var(--color-bg); padding: var(--space-2) 0; margin: 0 0 var(--space-4); }
  .jump-links a { flex: 0 0 auto; display: inline-flex; align-items: center; min-height: 36px; padding: 0 12px; border-radius: 999px; background: var(--color-surface); border: 1px solid var(--color-border); font-size: 13px; text-decoration: none; color: var(--color-secondary-text); }
  .brand-text, .topbar-title { font-size: 14px; }
  .lesson article p, .lesson article li { font-size: 17px; }
  .lesson article section { margin: var(--space-6) 0; }
  .lesson-footer { grid-template-columns: 1fr 1fr; }
  .lesson-footer [data-complete] { grid-column: 1 / -1; grid-row: 1; }
  .submission-head { grid-template-columns: minmax(0, 1fr); }
  .cert-title { flex-direction: column; align-items: flex-start; gap: var(--space-2); }
}

@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }

@media print {
  .course-header, .course-outline, .skip-link, .lesson-footer, .jump-links, .drawer-backdrop { display: none !important; }
  .layout { display: block; }
}

/* Iconos de línea (js/icons.js): heredan el color del texto, un poco atenuados */
.icon { flex: none; width: 18px; height: 18px; opacity: .8; }
.side-nav a:hover .icon, .user-menu-panel a:hover .icon, [aria-current="page"] > .icon { opacity: 1; }
.side-nav a[aria-current="page"] .icon { color: var(--color-brand); }
.user-menu-panel [data-logout] .icon { opacity: 1; }
.btn .icon { width: 16px; height: 16px; }

/* Franja de vista previa (personal) */
.preview-banner { background: var(--color-warning-soft); color: var(--color-warning-text); border-bottom: 1px solid var(--color-warning); padding: 8px clamp(12px, 2.4vw, 24px); font-size: 14px; text-align: center; }
.preview-banner a { color: inherit; font-weight: 600; margin-left: 6px; }

/* ---------- Portafolio de evidencias ---------- */
.portfolio-note { display: flex; gap: 10px; align-items: flex-start; margin: var(--space-3) 0 var(--space-4); padding: 10px 14px; border-radius: var(--radius-1); background: var(--color-brand-soft); color: var(--color-brand-strong); font-size: 15px; }
.portfolio-note .icon { flex: none; margin-top: 2px; color: var(--color-brand); opacity: 1; }
.portfolio-home { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--space-4); align-items: start; margin: var(--space-6) 0; padding: clamp(20px, 3vw, 28px); background: var(--color-surface); border: 1px solid var(--color-border); border-left: 4px solid var(--color-accent); border-radius: var(--radius-2); box-shadow: var(--shadow-1); }
.portfolio-home > div:first-child { width: 48px; height: 48px; border-radius: 12px; background: var(--color-accent-soft); color: var(--color-accent-text); display: grid; place-items: center; }
.portfolio-home > div:first-child .icon { width: 26px; height: 26px; opacity: 1; }
.portfolio-home h2 { margin: 2px 0 var(--space-2); font-size: 26px; }
.portfolio-home p { margin: 0 0 var(--space-3); color: var(--color-secondary-text); max-width: 68ch; }
.portfolio-gate { display: grid; gap: var(--space-3); padding-bottom: var(--space-4); margin-bottom: var(--space-2); border-bottom: 1px solid var(--color-border); }
.portfolio-gate h2 { display: flex; align-items: center; gap: 10px; margin: 0; font-size: 22px; }
.portfolio-gate h2 .icon { color: var(--color-accent); opacity: 1; width: 22px; height: 22px; }
.portfolio-gate p { margin: 0; }
.portfolio-goals { border: 1px solid var(--color-border); border-radius: var(--radius-1); padding: var(--space-3) var(--space-4); display: grid; gap: var(--space-2); margin: 0; }
.portfolio-goals legend { font-weight: 600; padding: 0 6px; }
.check-row.goal-option { grid-template-columns: 20px 76px minmax(0, 1fr); align-items: center; gap: 10px; min-height: var(--target-min); }
.goal-option input { margin-top: 0; }
.goal-option .cert-logo, .goal-option .cert-logo[src*="red-conocer"] { height: 30px; max-width: 72px; justify-self: start; }
.portfolio-cert { margin: var(--space-3) 0; }
.portfolio-cert h4 { margin: var(--space-4) 0 var(--space-2); font-size: 16px; font-family: var(--font-body); font-weight: 600; }
.portfolio-cert ul { margin: 0; padding-left: 1.2em; display: grid; gap: 6px; }
.portfolio-checklist { list-style: none; padding-left: 0 !important; }
.portfolio-checklist .check-row { align-items: flex-start; }
.portfolio-ack { font-weight: 600; padding: var(--space-3); border-radius: var(--radius-1); background: var(--color-accent-softer); border: 1px solid var(--color-accent-soft); }
.project-form-title { margin: var(--space-3) 0 0; font-size: 22px; }
.portfolio-acked { display: flex; gap: 8px; align-items: center; color: var(--color-secondary-text); }
.portfolio-acked .icon { color: var(--color-success); opacity: 1; }
.portfolio-progress { display: grid; gap: 8px; margin: var(--space-4) 0; }
.portfolio-progress .progress-line { display: flex; justify-content: space-between; gap: var(--space-3); font-variant-numeric: tabular-nums; }
.portfolio-progress p { margin: 0; }
.portfolio-goals-form { display: grid; gap: var(--space-3); margin: var(--space-4) 0; }
.portfolio-goals-form .btn { justify-self: start; }
.lead-text { font-size: 18px; color: var(--color-secondary-text); max-width: 68ch; }
.portfolio-table td { vertical-align: top; }
@media (max-width: 600px) { .portfolio-home { grid-template-columns: 1fr; } }
/* Siguiente paso en el inicio y confirmación del primer proyecto */
.path-card-main { border-top: 4px solid var(--color-brand); }
.portfolio-home.is-reminder { border-left-color: var(--color-brand); padding: 20px 24px; }
.portfolio-home.is-reminder h2 { font-size: 21px; }
.project-ready { padding: clamp(24px, 4vw, 40px); border-top: 4px solid var(--color-success); }
.project-ready .label { display: flex; align-items: center; gap: 6px; color: var(--color-success); }
.project-ready .label .icon { opacity: 1; }
.project-ready h1 { margin: var(--space-2) 0 var(--space-3); }
.project-ready p { color: var(--color-secondary-text); max-width: 62ch; }
/* «Hazlo con IA»: ayuda dentro de «Constrúyelo tú» */
.ai-help { margin: var(--space-6) 0 var(--space-4); padding: clamp(18px, 3vw, 26px); border: 1px solid var(--color-border); border-left: 4px solid var(--color-brand); border-radius: var(--radius-2); background: var(--color-surface); }
.ai-help h3 { margin: 0 0 var(--space-2); font-size: 22px; scroll-margin-top: calc(var(--topbar-h) + 64px); }
.ai-help .ai-project { display: flex; gap: 8px; align-items: flex-start; margin: 0 0 var(--space-3); font-size: 14px; color: var(--color-secondary-text); }
.ai-help .ai-project .icon { color: var(--color-success); opacity: 1; flex: none; margin-top: 2px; }
.ai-help .ai-split { margin: 0 0 var(--space-4); }
.ai-prompt { position: relative; margin: 0 0 var(--space-4); }
.ai-prompt .ai-prompt-title { margin: 0 0 6px; font-weight: 600; padding-right: 96px; }
.ai-prompt pre { margin: 0; padding: 14px 16px; white-space: pre-wrap; overflow-wrap: anywhere; font-family: var(--font-mono); font-size: 13.5px; line-height: 1.55; background: var(--color-surface-muted); border: 1px solid var(--color-border); border-radius: var(--radius-1); color: var(--color-text); }
.ai-prompt .ai-copy { position: absolute; top: -6px; right: 0; min-height: 34px; padding: 0 14px; font-size: 13px; }
.ai-help .ai-check-title { margin: var(--space-4) 0 var(--space-2); }
.ai-help .ai-check { margin: 0 0 var(--space-3); }
.ai-help .ai-privacy { margin: 0; padding: 10px 14px; border-radius: var(--radius-1); background: var(--color-accent-softer); font-size: 14px; }
.jump-links a.jump-ai { border-color: var(--color-brand); color: var(--color-brand-strong); }
@media print { .ai-copy { display: none; } }
/* Notificaciones: campana con contador, lista y aviso en el inicio */
.notif-bell { position: relative; }
.notif-bell .icon { width: 20px; height: 20px; opacity: 1; }
.notif-badge { position: absolute; top: 2px; right: 2px; min-width: 18px; height: 18px; padding: 0 5px; border-radius: 999px; background: var(--color-accent); color: #fff; font-size: 11px; font-weight: 700; line-height: 18px; text-align: center; }
.notif-list { list-style: none; margin: var(--space-4) 0; padding: 0; display: grid; gap: var(--space-3); }
.notif-item { display: grid; grid-template-columns: 40px minmax(0, 1fr); gap: var(--space-3); padding: 18px 20px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-2); }
.notif-item.is-unread { border-left: 4px solid var(--color-accent); background: var(--color-accent-softer); }
.notif-icon { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; background: var(--color-brand-soft); color: var(--color-brand-strong); }
.notif-icon .icon { opacity: 1; }
.notif-item h2 { margin: 2px 0 6px; font-size: 19px; }
.notif-meta { margin: 0; font-size: 13px; color: var(--color-muted); }
.notif-body { margin: 0 0 var(--space-3); white-space: pre-line; color: var(--color-secondary-text); }
.home-alert { margin: 0 0 var(--space-5); padding: 6px 20px; border: 1px solid var(--color-border); border-left: 4px solid var(--color-accent); border-radius: var(--radius-2); background: var(--color-accent-softer); }
.home-alert-row { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: var(--space-3); align-items: center; padding: 12px 0; }
.home-alert-row + .home-alert-row { border-top: 1px solid var(--color-border); }
.home-alert-row > .icon { width: 22px; height: 22px; opacity: 1; color: var(--color-accent-text); }
.home-alert-row p { margin: 0; }
@media (max-width: 600px) { .home-alert-row { grid-template-columns: auto minmax(0, 1fr); } .home-alert-row .btn { grid-column: 2; justify-self: start; } }

/* Secciones de lección: panel con tono propio y encabezado con ícono mediano */
.sec-head { display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: var(--space-4); align-items: center; margin-bottom: var(--space-4); }
.sec-head .sec-kicker { margin-bottom: 2px; }
.sec-head h2 { margin: 0; }
.sec-icon { width: 48px; height: 48px; border-radius: 13px; display: grid; place-items: center; background: var(--tone-tile, var(--color-brand-soft)); color: var(--tone-fg, var(--color-brand-strong)); }
.sec-icon .icon { width: 26px; height: 26px; opacity: 1; }
.lesson article section.sec-panel { max-width: var(--wide); margin: var(--space-5) auto; padding: var(--space-6) clamp(20px, 4vw, 48px); border-radius: var(--radius-2); background: var(--tone-bg); }
.lesson article section.sec-panel > * { max-width: var(--measure); }
.lesson article section.sec-panel > :is(figure, .first-principles-grid, .table-wrap, .lab-card, .practice-grid, .submission-panel, .sec-head) { max-width: none; }
.sec-panel .sec-kicker::after { background: var(--tone-fg); opacity: .5; }
.sec-panel .sec-num { color: var(--tone-fg); }
.tone-slate { --tone-bg: var(--tone-slate-bg); --tone-tile: var(--tone-slate-tile); --tone-fg: var(--tone-slate-fg); }
.tone-lavender { --tone-bg: var(--tone-lavender-bg); --tone-tile: var(--tone-lavender-tile); --tone-fg: var(--tone-lavender-fg); }
.tone-teal { --tone-bg: var(--tone-teal-bg); --tone-tile: var(--tone-teal-tile); --tone-fg: var(--tone-teal-fg); }
.tone-green { --tone-bg: var(--tone-green-bg); --tone-tile: var(--tone-green-tile); --tone-fg: var(--tone-green-fg); }
.tone-amber { --tone-bg: var(--tone-amber-bg); --tone-tile: var(--tone-amber-tile); --tone-fg: var(--tone-amber-fg); }
.tone-terracotta { --tone-bg: var(--tone-terracotta-bg); --tone-tile: var(--tone-terracotta-tile); --tone-fg: var(--tone-terracotta-fg); }
@media print { .lesson article section.sec-panel { background: none; padding: 0; } .sec-icon { display: none; } .sec-head { display: block; } }
@media (max-width: 760px) {
  .lesson article section.sec-panel { padding: var(--space-5) var(--space-4); margin: var(--space-4) calc(-1 * var(--space-2)); }
  .sec-head { grid-template-columns: 40px minmax(0, 1fr); gap: var(--space-3); }
  .sec-icon { width: 40px; height: 40px; border-radius: 11px; }
  .sec-icon .icon { width: 22px; height: 22px; }
}
/* Guía de IA del curso */
.ai-rules { list-style: none; counter-reset: rule; padding: 0; margin: var(--space-4) 0; display: grid; gap: var(--space-3); }
.ai-rules li { counter-increment: rule; position: relative; padding: 18px 20px 18px 64px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-2); }
.ai-rules li::before { content: counter(rule); position: absolute; left: 20px; top: 18px; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: var(--tone-teal-tile); color: var(--tone-teal-fg); font-weight: 700; font-size: 14px; }
.ai-rules h3 { margin: 0 0 4px; font-size: 19px; }
.ai-rules p { margin: 0; color: var(--color-secondary-text); }
.ai-howto li + li { margin-top: 6px; }
.ai-help .ai-guide-link { display: flex; align-items: center; gap: 6px; margin: var(--space-3) 0 0; font-size: 14px; }
.ai-help .ai-guide-link .icon { width: 16px; height: 16px; opacity: 1; color: var(--color-brand); }
.ai-use { border: 1px solid var(--color-border); border-radius: var(--radius-1); padding: var(--space-3) var(--space-4); margin: 0; display: grid; gap: var(--space-2); }
.ai-use legend { font-weight: 600; padding: 0 6px; }
.ai-use .form-hint { margin: 0; }