/* ==========================================================================
   BioStudy Lab — Estilos globales
   Depende de css/variables.css
   ========================================================================== */

/* --- Reset mínimo ---------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.55;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  margin: 0;
  font-family: var(--font-display);
  line-height: 1.15;
  letter-spacing: -0.012em;
}

p { margin: 0; }
img, svg { display: block; max-width: 100%; }
button, input { font: inherit; color: inherit; }
[hidden] { display: none !important; }

:focus-visible {
  outline: 3px solid var(--focus-ring-color);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

/* --- Marca ----------------------------------------------------------------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: inherit;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
}
.brand__mark { width: 34px; height: 34px; flex: none; }

/* --- Botones --------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 46px;
  padding: 0.65rem 1.15rem;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s, transform 0.1s;
}
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.btn--primary { background: var(--color-violet); color: #fff; }
.btn--primary:hover:not(:disabled) { background: var(--color-violet-600); }

.btn--outline {
  background: var(--color-surface);
  color: var(--color-violet);
  border-color: var(--color-border-strong);
}
.btn--outline:hover:not(:disabled) { border-color: var(--color-violet); background: var(--color-violet-100); }

.btn--on-dark {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.28);
}
.btn--on-dark:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.55);
}

.btn--block { width: 100%; }

.btn[aria-busy="true"]::before {
  content: '';
  width: 1em;
  height: 1em;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.link-btn {
  padding: 0;
  border: 0;
  background: none;
  color: var(--color-violet);
  font-size: var(--fs-sm);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  cursor: pointer;
}
.link-btn:hover { color: var(--color-violet-600); }

/* --- Formularios ----------------------------------------------------------- */
.field { display: grid; gap: 0.4rem; }
.field__label { font-size: var(--fs-sm); font-weight: 700; }
.field__hint { font-size: var(--fs-xs); color: var(--color-text-muted); }

.input {
  width: 100%;
  min-height: 48px;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  font-size: 1rem; /* 16px evita el zoom automático en iOS */
  transition: border-color 0.15s, box-shadow 0.15s;
}
.input::placeholder { color: #8A93AB; }
.input:hover { border-color: #A6AFC6; }
.input:focus {
  outline: none;
  border-color: var(--color-violet);
  box-shadow: 0 0 0 3px rgba(98, 86, 201, 0.2);
}
.input[aria-invalid="true"] { border-color: var(--color-danger); }

.input-wrap { position: relative; }
.input-wrap .input { padding-right: 5.5rem; }

.toggle-pass {
  position: absolute;
  top: 50%;
  right: 0.4rem;
  transform: translateY(-50%);
  padding: 0.4rem 0.6rem;
  border: 0;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
  font-weight: 700;
  cursor: pointer;
}
.toggle-pass:hover { color: var(--color-violet); background: var(--color-violet-100); }

/* --- Avisos ---------------------------------------------------------------- */
.alert {
  padding: 0.8rem 1rem;
  border-left: 4px solid;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
}
.alert--error { background: var(--color-danger-100); border-color: var(--color-danger); color: var(--color-danger-800); }
.alert--success { background: var(--color-teal-100); border-color: var(--color-teal); color: var(--color-teal-700); }
.alert--info { background: var(--color-amber-100); border-color: var(--color-amber); color: var(--color-amber-800); }

.config-banner {
  padding: 0.75rem 1.25rem;
  background: var(--color-amber);
  color: var(--color-night);
  font-size: var(--fs-sm);
  text-align: center;
}
.config-banner code {
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  background: rgba(23, 32, 57, 0.1);
  font-size: 0.9em;
}

/* ==========================================================================
   PÁGINA DE ACCESO (index.html)
   ========================================================================== */
.auth-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  min-height: 100vh;
  min-height: 100dvh;
}

/* Panel izquierdo: papel milimetrado de electrocardiograma */
.auth-hero {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 2.5rem;
  padding: clamp(2rem, 4vw, 3.5rem);
  overflow: hidden;
  background-color: var(--color-night);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 100px 100px, 100px 100px, 20px 20px, 20px 20px;
  color: var(--color-text-on-dark);
}
.auth-hero .brand { color: #fff; }

.auth-hero__body h1 {
  max-width: 15ch;
  color: #fff;
  font-size: var(--fs-3xl);
  font-weight: 700;
}
.auth-hero__body p {
  max-width: 42ch;
  margin-top: var(--space-4);
  color: var(--color-text-on-dark-muted);
  font-size: 1.125rem;
}

.auth-features {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--fs-sm);
}
.auth-features li { display: flex; align-items: center; gap: 0.65rem; }
.auth-features .dot { width: 10px; height: 10px; border-radius: 50%; flex: none; }
.dot--violet { background: var(--color-violet); box-shadow: 0 0 0 3px rgba(98, 86, 201, 0.3); }
.dot--teal { background: var(--color-teal); box-shadow: 0 0 0 3px rgba(39, 138, 128, 0.3); }
.dot--amber { background: var(--color-amber); box-shadow: 0 0 0 3px rgba(242, 193, 78, 0.3); }

.auth-hero__foot { color: #8C95B0; font-size: var(--fs-xs); }

/* Panel derecho: formularios */
.auth-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1.5rem, 4vw, 3rem);
}
.auth-card { width: 100%; max-width: 420px; }

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-bottom: var(--space-6);
  padding: 4px;
  border-radius: var(--radius-md);
  background: #E5E8F2;
}
.tab {
  min-height: 42px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
}
.tab:hover { color: var(--color-night); }
.tab[aria-selected="true"] {
  background: var(--color-surface);
  color: var(--color-night);
  box-shadow: 0 1px 2px rgba(23, 32, 57, 0.14);
}

.auth-form { display: grid; gap: 1.1rem; }
.auth-form__head { display: grid; gap: 0.4rem; margin-bottom: 0.25rem; }
.auth-form__head h2 { font-size: var(--fs-xl); font-weight: 700; }
.auth-form__head p { color: var(--color-text-muted); font-size: var(--fs-sm); }
.auth-form__row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.auth-form__foot { text-align: center; }
.auth-message { margin-top: var(--space-5); }

/* ==========================================================================
   APLICACIÓN (app.html)
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  min-height: var(--navbar-h);
  padding: 0.6rem clamp(1rem, 3vw, 2rem);
  padding-top: calc(0.6rem + env(safe-area-inset-top));
  background: var(--color-night);
  color: #fff;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06), 0 6px 20px -12px rgba(0, 0, 0, 0.5);
}

.navbar__stats { display: flex; gap: 0.5rem; margin-left: auto; }

.stat {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-pill);
  font-size: var(--fs-sm);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  transition: background-color 0.2s, color 0.2s;
}
.stat__icon { width: 16px; height: 16px; flex: none; }
.stat__label { font-weight: 400; opacity: 0.9; }

.stat--xp {
  background: rgba(242, 193, 78, 0.14);
  color: var(--color-amber);
  box-shadow: inset 0 0 0 1px rgba(242, 193, 78, 0.35);
}
.stat--boss {
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text-on-dark);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.14);
}
.stat--boss.has-pending {
  background: var(--color-amber);
  color: var(--color-night);
  box-shadow: none;
}

.navbar__user { display: flex; align-items: center; gap: 0.75rem; }
.avatar {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  flex: none;
  border-radius: 50%;
  background: var(--color-violet);
  font-size: 0.875rem;
  font-weight: 700;
}
.user-name {
  max-width: 18ch;
  overflow: hidden;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.navbar .btn { min-height: 38px; padding: 0.45rem 0.85rem; }

/* --- Dashboard ------------------------------------------------------------- */
.dashboard {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 2.75rem) clamp(1rem, 3vw, 2rem) var(--space-8);
}

.dash-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.25rem;
  margin-bottom: var(--space-6);
}
.dash-greeting { margin-bottom: 0.35rem; color: var(--color-text-muted); }
.dash-head h1 { font-size: var(--fs-2xl); font-weight: 800; }

.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.chip {
  min-height: 36px;
  padding: 0.4rem 0.9rem;
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
  font-weight: 700;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.chip:hover { border-color: var(--color-violet); color: var(--color-violet); }
.chip[aria-pressed="true"] {
  border-color: var(--color-night);
  background: var(--color-night);
  color: #fff;
  box-shadow: var(--shadow-xs);
}

.semester-group + .semester-group { margin-top: 2.5rem; }
.semester-group__head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: var(--space-4);
}
.semester-group__head h2 { font-size: var(--fs-lg); font-weight: 700; }
.semester-group__count { color: var(--color-text-muted); font-size: var(--fs-sm); white-space: nowrap; }
.semester-group__head::after {
  content: '';
  flex: 1;
  height: 1px;
  align-self: center;
  background: var(--color-border);
}

.subject-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-4);
}

.subject-card {
  --accent: var(--color-violet);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  min-height: 184px;
  padding: 1.25rem 1.25rem 1rem 1.5rem;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}
.subject-card::before {
  content: '';
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--accent);
}
.subject-card__top { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; }
.subject-card__glyph {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 12%, white);
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
}
.subject-card__code { color: var(--color-text-muted); font-size: var(--fs-xs); font-weight: 700; letter-spacing: 0.02em; }
.subject-card__title { font-size: 1.1875rem; font-weight: 700; line-height: 1.25; }
.subject-card__desc {
  display: -webkit-box;
  overflow: hidden;
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.subject-card__footer {
  display: grid;
  gap: 0.75rem;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--color-border);
}
.subject-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
}
.subject-card__cta {
  min-height: 40px;
  padding: 0.5rem 0.9rem;
  font-size: var(--fs-xs);
}

/* --- Insignia de rol y botón Panel Admin en Navbar ------------------------- */
.role-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.12);
  color: var(--color-text-on-dark);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.role-badge[data-role="admin"] {
  background: rgba(242, 193, 78, 0.2);
  color: var(--color-amber);
  box-shadow: inset 0 0 0 1px rgba(242, 193, 78, 0.45);
}
.role-badge[data-role="editor"] {
  background: rgba(39, 138, 128, 0.25);
  color: var(--color-teal-300);
  box-shadow: inset 0 0 0 1px rgba(92, 199, 187, 0.45);
}

.btn--admin-nav {
  background: var(--color-amber);
  color: var(--color-night);
  border-color: var(--color-amber);
}
.btn--admin-nav:hover:not(:disabled) {
  background: #f5cc6a;
  color: var(--color-night);
}

/* ==========================================================================
   VISTA DE ASIGNATURA, TEMAS Y APUNTES (topic.html)
   ========================================================================== */
.topic-page {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: clamp(1.25rem, 3vw, 2.25rem) clamp(1rem, 3vw, 2rem) var(--space-8);
}

.topic-page__header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}
.topic-page__header h1 {
  font-size: var(--fs-2xl);
  font-weight: 800;
}
.topic-page__desc {
  max-width: 68ch;
  margin-top: 0.35rem;
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
}

.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.4rem;
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
  font-weight: 700;
}
.breadcrumb a {
  color: var(--color-violet);
  text-decoration: none;
}
.breadcrumb a:hover { text-decoration: underline; }

.topic-mobile-picker {
  width: 100%;
  max-width: 340px;
}

.topic-workspace {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  gap: var(--space-5);
  align-items: start;
}

.topic-sidebar {
  position: sticky;
  top: calc(var(--navbar-h) + 1.25rem);
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}
.topic-sidebar__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--color-border);
}
.topic-sidebar__head h2 {
  font-size: var(--fs-sm);
  font-weight: 700;
}
.topic-sidebar__count {
  padding: 0.1rem 0.5rem;
  border-radius: var(--radius-pill);
  background: var(--color-violet-100);
  color: var(--color-violet);
  font-size: var(--fs-xs);
  font-weight: 700;
}

.topic-list {
  display: grid;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.skeleton-topic-item {
  height: 54px;
  border-radius: var(--radius-md);
}

.topic-item {
  display: grid;
  gap: 0.15rem;
  width: 100%;
  padding: 0.65rem 0.8rem;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  background: transparent;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s;
}
.topic-item:hover {
  background: var(--color-bg);
  border-color: var(--color-border);
}
.topic-item.is-active {
  background: var(--color-violet-100);
  border-color: var(--color-violet);
}
.topic-item__unit {
  color: var(--color-violet);
  font-size: var(--fs-xs);
  font-weight: 700;
}
.topic-item__title {
  color: var(--color-night);
  font-size: var(--fs-sm);
  font-weight: 700;
  line-height: 1.3;
}

/* --- Hoja de estudio y Markdown renderizado -------------------------------- */
.study-sheet {
  padding: clamp(1.25rem, 3vw, 2.25rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-raised);
}
.study-sheet__head {
  padding-bottom: 1.25rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}
.study-sheet__eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.6rem;
}
.unit-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-pill);
  background: var(--color-night);
  color: #fff;
  font-size: var(--fs-xs);
  font-weight: 700;
}
.study-sheet__slug {
  color: var(--color-text-muted);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: var(--fs-xs);
}
.study-sheet__title {
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  font-weight: 800;
}

.study-prose {
  max-width: 72ch;
  color: var(--color-text);
  line-height: 1.68;
}
.study-prose > * + * { margin-top: 1rem; }
.study-prose h2,
.study-prose h3,
.study-prose h4 {
  margin-top: 1.65rem;
  margin-bottom: 0.45rem;
  color: var(--color-night);
}
.study-prose h2 { font-size: 1.35rem; }
.study-prose h3 { font-size: 1.15rem; color: var(--color-night-800); }
.study-prose h4 { font-size: 1.02rem; }
.study-prose ul,
.study-prose ol {
  padding-left: 1.4rem;
}
.study-prose li + li { margin-top: 0.35rem; }
.study-prose strong { color: var(--color-night); font-weight: 700; }
.study-prose code {
  padding: 0.12rem 0.38rem;
  border-radius: 4px;
  background: var(--color-bg);
  color: var(--color-violet-600);
  font-size: 0.92em;
}
.study-prose pre {
  padding: 0.9rem 1.1rem;
  overflow-x: auto;
  border-radius: var(--radius-md);
  background: var(--color-night);
  color: var(--color-text-on-dark);
}
.study-prose pre code {
  padding: 0;
  background: none;
  color: inherit;
}
.study-prose blockquote {
  margin-left: 0;
  padding: 0.65rem 1rem;
  border-left: 4px solid var(--color-violet);
  border-radius: var(--radius-sm);
  background: var(--color-violet-100);
}

/* Recuadro de Fuente verificada */
.verified-source {
  display: grid;
  gap: 0.35rem;
  margin-top: 2rem;
  padding: 1rem 1.15rem;
  border: 1px solid rgba(39, 138, 128, 0.35);
  border-left: 4px solid var(--color-teal);
  border-radius: var(--radius-md);
  background: var(--color-teal-100);
  color: var(--color-teal-700);
}
.verified-source__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.verified-source__text {
  color: var(--color-night);
  font-size: var(--fs-sm);
}

/* Tres tarjetas de acción del tema */
.topic-actions {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}
.topic-actions__heading {
  margin-bottom: 1rem;
  font-size: var(--fs-lg);
}
.topic-actions__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.action-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.15rem 1.2rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-night);
  text-decoration: none;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.action-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-raised);
}
.action-card__tag {
  font-size: var(--fs-xs);
  font-weight: 700;
}
.action-card__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
}
.action-card__desc {
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
}
.action-card--violet { border-top: 4px solid var(--color-violet); }
.action-card--violet .action-card__tag { color: var(--color-violet); }
.action-card--violet:hover { border-color: var(--color-violet); }

.action-card--teal { border-top: 4px solid var(--color-teal); }
.action-card--teal .action-card__tag { color: var(--color-teal); }
.action-card--teal:hover { border-color: var(--color-teal); }

.action-card--amber { border-top: 4px solid var(--color-amber); }
.action-card--amber .action-card__tag { color: var(--color-amber-800); }
.action-card--amber:hover { border-color: var(--color-amber); }

/* ==========================================================================
   PANEL DE ADMINISTRACIÓN (admin.html)
   ========================================================================== */
.admin-dashboard {
  display: grid;
  gap: 2.5rem;
}
.admin-section {
  display: grid;
  gap: 1.25rem;
  scroll-margin-top: calc(var(--navbar-h) + 1rem);
}
.admin-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
}
.admin-section__step {
  display: inline-block;
  margin-bottom: 0.25rem;
  color: var(--color-violet);
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.admin-section__head h2 { font-size: var(--fs-xl); }
.admin-section__head p {
  margin-top: 0.25rem;
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
}

.admin-grid-two {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.95fr);
  gap: 1.25rem;
  align-items: start;
}

.admin-card {
  padding: clamp(1.1rem, 2.5vw, 1.6rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}
.admin-card__subhead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--color-border);
}
.admin-card__subhead h3 { font-size: var(--fs-base); }

.admin-form { display: grid; gap: 1rem; }
.admin-form__row-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
}
.admin-form__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}
.admin-form__mode {
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
  font-weight: 700;
}

.textarea {
  min-height: 140px;
  line-height: 1.5;
  resize: vertical;
}
.textarea--code {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.875rem;
}
.file-input {
  padding: 0.55rem 0.75rem;
}

.md-preview {
  margin-top: 0.5rem;
  padding: 1rem;
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}

.importer-samples {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.batch-preview {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  background: var(--color-violet-100);
  color: var(--color-night);
  font-size: var(--fs-sm);
}

.alert__list {
  margin: 0.45rem 0 0;
  padding-left: 1.25rem;
}
.alert__list li + li { margin-top: 0.2rem; }

/* Etiquetas de estado: draft (gris), review (ámbar), published (verde azulado) */
.status-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.22rem 0.65rem;
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  font-weight: 700;
  white-space: nowrap;
}
.status-pill--draft {
  background: #E5E8F0;
  color: #3D465E;
}
.status-pill--review {
  background: var(--color-amber);
  color: var(--color-night);
}
.status-pill--published {
  background: var(--color-teal);
  color: #fff;
}

.diff-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  font-weight: 700;
}
.diff-pill--basic {
  background: var(--color-violet-100);
  color: var(--color-violet-600);
}
.diff-pill--advanced {
  background: var(--color-amber-100);
  color: var(--color-amber-800);
}

/* Botones compactos para filas de revisión */
.btn--xs {
  min-height: 32px;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: var(--fs-xs);
}
.btn--status-review {
  background: var(--color-amber-100);
  border-color: var(--color-amber);
  color: var(--color-amber-800);
}
.btn--status-review:hover:not(:disabled) {
  background: var(--color-amber);
  color: var(--color-night);
}
.btn--status-publish {
  background: var(--color-teal);
  border-color: var(--color-teal);
  color: #fff;
}
.btn--status-publish:hover:not(:disabled) {
  background: var(--color-teal-700);
}
.btn--status-draft {
  background: #EEF0F6;
  border-color: var(--color-border-strong);
  color: var(--color-text-muted);
}
.btn--status-draft:hover:not(:disabled) {
  background: #E1E5F0;
  color: var(--color-night);
}

.status-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.admin-topics-list,
.review-list {
  display: grid;
  gap: 0.85rem;
  max-height: 620px;
  overflow-y: auto;
  padding-right: 0.2rem;
}

.admin-item,
.review-item {
  display: grid;
  gap: 0.55rem;
  padding: 0.95rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}
.admin-item__top,
.review-item__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}
.admin-item__title {
  margin-left: 0.35rem;
  font-size: var(--fs-sm);
}
.admin-item__meta {
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
}
.admin-item__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding-top: 0.45rem;
  border-top: 1px dashed var(--color-border-strong);
}
.admin-item__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.review-toolbar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.review-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}
.review-item__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.review-item__prompt {
  font-size: var(--fs-sm);
  font-weight: 700;
}
.review-item__explanation,
.review-item__source {
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
}
.review-options {
  display: grid;
  gap: 0.3rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--fs-xs);
}
.review-options__item {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.35rem 0.55rem;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}
.review-options__item.is-correct {
  border-color: var(--color-teal);
  background: var(--color-teal-100);
  color: var(--color-teal-700);
}
.review-options__id { font-weight: 700; }
.review-options__correct-tag { margin-left: auto; white-space: nowrap; }

.state-panel__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin-top: 0.35rem;
}

/* --- Estados: carga, vacío, error ----------------------------------------- */
.skeleton {
  background: linear-gradient(90deg, #E7EAF3 25%, #F1F3F9 50%, #E7EAF3 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
}
.skeleton-card { height: 184px; border-radius: var(--radius-lg); }
.skeleton-title { width: 180px; height: 22px; margin-bottom: var(--space-4); border-radius: var(--radius-sm); }

.state-panel {
  display: grid;
  justify-items: center;
  gap: 0.75rem;
  padding: 2.75rem 1.5rem;
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  text-align: center;
}
.state-panel h2 { font-size: var(--fs-lg); }
.state-panel p { max-width: 52ch; color: var(--color-text-muted); }
.state-panel--error { border-style: solid; border-color: #F1C4BF; }
.state-panel__detail { color: var(--color-text-muted); font-size: var(--fs-xs); }
.state-panel code {
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  background: var(--color-bg);
}

/* --- Animaciones ----------------------------------------------------------- */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }
/* --- Fase 4: Modal de Nombre, Flashcards FSRS y Cuestionarios ------------- */

/* Modal de edición de nombre / detección de matrícula */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 1.25rem;
  background: rgba(23, 32, 57, 0.68);
  backdrop-filter: blur(4px);
}
.modal-backdrop[hidden] {
  display: none !important;
}

.modal-card {
  width: min(100%, 460px);
  padding: 1.65rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
  display: grid;
  gap: 1.1rem;
}

.modal-card__head {
  display: grid;
  gap: 0.45rem;
  justify-items: start;
}

.modal-card__title {
  font-size: var(--fs-lg);
  color: var(--color-night);
}

.modal-card__desc {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
}

.modal-form {
  display: grid;
  gap: 1rem;
}

.modal-form__actions,
.modal-card__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.65rem;
}

/* Contenedor de estudio centrado (Flashcards y Quiz) */
.study-stage {
  width: min(100% - 2rem, 840px);
  margin-inline: auto;
  padding-block: clamp(1.5rem, 3vw, 2.5rem) 4rem;
}

.study-stage__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.35rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.study-stage__head h1 {
  font-size: var(--fs-xl);
}

.deck-mode-bar {
  display: inline-flex;
  gap: 0.4rem;
  padding: 0.25rem;
  border-radius: var(--radius-pill);
  background: #E7EAF3;
}

.quiz-score-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-pill);
  background: var(--color-teal-100);
  color: var(--color-teal-700);
  font-size: var(--fs-sm);
}

/* Barra de progreso de sesión */
.fc-container,
.quiz-container {
  display: grid;
  gap: 1.15rem;
}

.fc-progress {
  display: grid;
  gap: 0.5rem;
}

.fc-progress__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: var(--fs-sm);
}

.quiz-meta-pills {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.progress-track {
  width: 100%;
  height: 10px;
  border-radius: var(--radius-pill);
  background: #E2E6F2;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--color-violet) 0%, var(--color-teal) 100%);
  transition: width 240ms var(--ease-out);
}

/* Tarjeta Flashcard FSRS */
.fc-card,
.quiz-card {
  display: grid;
  gap: 1.35rem;
  padding: clamp(1.35rem, 3vw, 2.15rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
}

.fc-face {
  display: grid;
  gap: 0.65rem;
}

.fc-face--back {
  padding-top: 1.25rem;
  border-top: 2px dashed var(--color-border-strong);
}

.fc-face__label {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-pill);
  background: var(--color-violet-100);
  color: var(--color-violet-600);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.fc-face__label--teal {
  background: var(--color-teal-100);
  color: var(--color-teal-700);
}

.fc-face__text {
  font-size: var(--fs-lg);
  line-height: 1.38;
  color: var(--color-night);
}

.fc-face__source {
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
}

.fc-face__answer {
  padding: 1.1rem 1.25rem;
  border-left: 4px solid var(--color-teal);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--color-teal-100);
  color: var(--color-night);
  font-size: var(--fs-base);
  line-height: 1.6;
}

.fc-actions {
  padding-top: 0.35rem;
}

.kbd-hint {
  opacity: 0.82;
  font-size: var(--fs-xs);
  font-weight: 400;
}

.fc-rating-block {
  display: grid;
  gap: 0.75rem;
}

.fc-rating-block__prompt {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  font-weight: 700;
  text-align: center;
}

.fc-rating-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.65rem;
}

.fc-rate-btn {
  display: grid;
  justify-items: center;
  gap: 0.2rem;
  padding: 0.75rem 0.5rem;
  border: 1.5px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-night);
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
}
.fc-rate-btn:hover:not(:disabled) {
  transform: translateY(-2px);
}
.fc-rate-btn:disabled {
  opacity: 0.6;
  cursor: wait;
}

.fc-rate-btn__interval {
  padding: 0.12rem 0.5rem;
  border-radius: var(--radius-pill);
  background: rgba(23, 32, 57, 0.08);
  font-size: var(--fs-xs);
  font-weight: 700;
}

.fc-rate-btn__label {
  font-family: var(--font-display);
  font-size: var(--fs-base);
}

.fc-rate-btn__sub {
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

.fc-rate-btn--again {
  border-color: #EBA8A1;
  background: var(--color-danger-100);
}
.fc-rate-btn--again:hover:not(:disabled) {
  border-color: var(--color-danger);
}

.fc-rate-btn--hard {
  border-color: var(--color-amber);
  background: var(--color-amber-100);
}

.fc-rate-btn--good {
  border-color: var(--color-teal);
  background: var(--color-teal-100);
}

.fc-rate-btn--easy {
  border-color: var(--color-violet);
  background: var(--color-violet-100);
}

/* Cuestionario de Práctica (quiz.html) */
.quiz-card__head {
  display: grid;
  gap: 0.45rem;
}

.quiz-card__source {
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
  font-weight: 700;
}

.quiz-card__prompt {
  font-size: var(--fs-lg);
  line-height: 1.38;
  color: var(--color-night);
}

.quiz-options {
  display: grid;
  gap: 0.65rem;
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  width: 100%;
  padding: 0.9rem 1.05rem;
  border: 1.5px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--fs-base);
  text-align: left;
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}

.quiz-option:hover:not(:disabled) {
  border-color: var(--color-violet);
  background: var(--color-surface);
}

.quiz-option:disabled {
  cursor: default;
}

.quiz-option__key {
  display: inline-grid;
  place-items: center;
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  color: var(--color-night);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-sm);
}

.quiz-option__text {
  flex: 1;
}

.quiz-option__badge {
  margin-left: auto;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  font-weight: 700;
  white-space: nowrap;
}

.quiz-option--selected {
  border-color: var(--color-violet);
  background: var(--color-violet-100);
}
.quiz-option--selected .quiz-option__key {
  background: var(--color-violet);
  border-color: var(--color-violet);
  color: #fff;
}

/* Opción correcta resaltada en verde azulado (--color-teal) */
.quiz-option--correct {
  border-color: var(--color-teal);
  background: var(--color-teal-100);
  color: var(--color-night);
}
.quiz-option--correct .quiz-option__key {
  background: var(--color-teal);
  border-color: var(--color-teal);
  color: #fff;
}
.quiz-option__badge--correct {
  background: var(--color-teal);
  color: #fff;
}

/* Opción elegida incorrecta resaltada en rojo suave (--color-danger) */
.quiz-option--wrong {
  border-color: var(--color-danger);
  background: var(--color-danger-100);
  color: var(--color-night);
}
.quiz-option--wrong .quiz-option__key {
  background: var(--color-danger);
  border-color: var(--color-danger);
  color: #fff;
}
.quiz-option__badge--wrong {
  background: var(--color-danger);
  color: #fff;
}

/* Panel de retroalimentación científica */
.quiz-feedback {
  display: grid;
  gap: 0.55rem;
  padding: 1.15rem 1.25rem;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-teal);
  background: var(--color-teal-100);
}

.quiz-feedback--wrong {
  border-left-color: var(--color-danger);
  background: #FDF2F1;
}

.quiz-feedback__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
}

.quiz-feedback__badge {
  display: inline-flex;
  align-items: center;
  padding: 0.18rem 0.6rem;
  border-radius: var(--radius-pill);
  background: var(--color-teal);
  color: #fff;
  font-size: var(--fs-xs);
  font-weight: 700;
}
.quiz-feedback--wrong .quiz-feedback__badge {
  background: var(--color-danger);
}

.quiz-feedback__message {
  color: var(--color-night);
  font-size: var(--fs-base);
}

.quiz-feedback__explanation {
  color: var(--color-text);
  font-size: var(--fs-sm);
  line-height: 1.6;
}

.quiz-feedback__source {
  padding-top: 0.35rem;
  border-top: 1px dashed rgba(23, 32, 57, 0.16);
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
}

.quiz-card__footer {
  padding-top: 0.25rem;
}

/* Resumen final de sesión (Flashcards y Quiz) */
.summary-card {
  display: grid;
  justify-items: center;
  gap: 1rem;
  padding: 2.5rem 1.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
  text-align: center;
}

.summary-card h2 {
  font-size: var(--fs-xl);
}

.summary-card p {
  max-width: 54ch;
  color: var(--color-text-muted);
}

.summary-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(95px, 1fr));
  gap: 0.75rem;
  width: min(100%, 540px);
  margin-block: 0.35rem;
}

.summary-metric {
  display: grid;
  gap: 0.2rem;
  padding: 0.85rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}

.summary-metric__num {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 800;
  color: var(--color-night);
}

.summary-metric__label {
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
  font-weight: 700;
}

/* --- Fase 5: Navegación conectada, Modo Juego A/B, Arena BOSS y Perfil ---- */

.stat--link {
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.stat--link:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.14);
}

.user-profile-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: inherit;
  text-decoration: none;
  padding: 0.25rem 0.45rem;
  border-radius: var(--radius-pill);
  transition: background var(--dur-fast) var(--ease-out);
}
.user-profile-link:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn--amber-solid {
  background: var(--color-amber);
  border-color: var(--color-amber);
  color: var(--color-night);
  font-weight: 700;
}
.btn--amber-solid:hover:not(:disabled) {
  background: #E7B236;
  border-color: #E7B236;
}

.game-resolution-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}
.game-resolution-actions > .btn {
  flex: 1 1 220px;
}

/* Variante ámbar para aviso de BOSS_PENDING y BOSS_LOST */
.quiz-feedback--boss {
  border-left-color: var(--color-amber);
  background: var(--color-amber-100);
}

.quiz-feedback__badge--amber {
  background: var(--color-amber);
  color: var(--color-night);
}

.quiz-feedback__subnote {
  color: var(--color-amber-800);
  font-size: var(--fs-xs);
  font-weight: 700;
}

/* Arena de Desafíos BOSS (boss.html) */
.boss-list-wrap {
  display: grid;
  gap: 1.1rem;
}

.boss-list-intro {
  padding: 0.9rem 1.15rem;
  border-radius: var(--radius-md);
  background: var(--color-violet-100);
  color: var(--color-night);
  font-size: var(--fs-sm);
}

.boss-list {
  display: grid;
  gap: 1rem;
}

.boss-card {
  display: grid;
  gap: 0.9rem;
  padding: 1.35rem 1.5rem;
  border: 1.5px solid var(--color-border-strong);
  border-left: 5px solid var(--color-amber);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.boss-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}

.boss-card__context {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--fs-xs);
}

.boss-card__subject {
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-pill);
  background: var(--color-night);
  color: #fff;
  font-weight: 700;
}

.boss-card__topic {
  color: var(--color-night);
  font-size: var(--fs-sm);
}

.boss-card__badges {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
}

.boss-card__prompt {
  color: var(--color-night);
  font-size: var(--fs-base);
  font-weight: 700;
  line-height: 1.45;
}

.boss-card__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-top: 0.65rem;
  border-top: 1px dashed var(--color-border-strong);
}

.boss-card__attempts {
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
  font-weight: 700;
}

/* Perfil de Progreso e Historial (profile.html) */
.profile-hero-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 1.6rem 1.75rem;
  margin-bottom: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.profile-hero-card__identity {
  display: flex;
  align-items: center;
  gap: 1.15rem;
}

.profile-hero-card__avatar {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: var(--color-violet);
  color: #fff;
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 800;
  flex-shrink: 0;
}

.profile-hero-card__name {
  margin-top: 0.25rem;
  font-size: var(--fs-xl);
}

.profile-hero-card__meta {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
}

.profile-hero-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.profile-kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.profile-kpi-card {
  display: grid;
  gap: 0.35rem;
  padding: 1.25rem 1.35rem;
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-violet);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-xs);
}
.profile-kpi-card--amber { border-top-color: var(--color-amber); }
.profile-kpi-card--violet { border-top-color: var(--color-violet); }
.profile-kpi-card--teal { border-top-color: var(--color-teal); }
.profile-kpi-card--night { border-top-color: var(--color-night); }

.profile-kpi-card__tag {
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.profile-kpi-card__value {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: 800;
  color: var(--color-night);
}

.profile-kpi-card__sub {
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
}

.profile-history-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.25rem;
}

.profile-feed {
  display: grid;
  gap: 0.65rem;
}

.profile-feed-list {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.profile-feed-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.8rem 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}

.profile-feed-item__main {
  display: grid;
  gap: 0.15rem;
}

.profile-feed-item__title {
  color: var(--color-night);
  font-size: var(--fs-sm);
}

.profile-feed-item__date {
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
}

.profile-empty-box {
  display: grid;
  justify-items: start;
  gap: 0.65rem;
  padding: 1.25rem;
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
}

/* ==========================================================================
   BioMed Survivors (2D Top-Down Action-Survivor Canvas & Pre-Match)
   ========================================================================== */
.survivor-page {
  background: var(--color-bg);
}

.pregame-section {
  display: grid;
  gap: 0.85rem;
}

.pregame-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
}

.pregame-section__head h2 {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  color: var(--color-night);
}

.units-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 0.85rem;
}

.unit-card {
  display: grid;
  align-content: start;
  gap: 0.65rem;
  padding: 0.95rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  text-align: left;
  cursor: pointer;
  transition: transform 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.unit-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-violet);
  box-shadow: var(--shadow-sm);
}

.unit-card__weapon {
  color: var(--color-night);
  font-size: var(--fs-xs);
  padding: 0.35rem 0.55rem;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.unit-card__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-teal);
}

.unit-card__desc {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
  line-height: 1.4;
}

.worlds-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
}

.world-card {
  display: grid;
  align-content: start;
  gap: 0.35rem;
  padding: 0.9rem 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  text-align: left;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.world-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-teal);
}

.world-card__sub {
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
}

.btn--xl {
  padding: 0.85rem 1.6rem;
  font-size: var(--fs-base);
  font-weight: 800;
}

/* Arena & HUD */
.arena-wrapper {
  display: grid;
  gap: 0.75rem;
}

.survivor-hud {
  display: grid;
  gap: 0.6rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-lg);
  background: var(--color-night);
  color: #F4F6FB;
  border: 1px solid rgba(98, 86, 201, 0.45);
  box-shadow: var(--shadow-md);
}

.hud-timer-box {
  display: grid;
  justify-items: center;
  gap: 0.1rem;
}

.hud-timer {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-amber);
  letter-spacing: 0.06em;
}

.hud-boss-bar {
  display: grid;
  gap: 0.35rem;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-md);
  background: rgba(242, 193, 78, 0.14);
  border: 1px solid var(--color-amber);
}

#survivor-canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 960 / 560;
  touch-action: none;
  cursor: crosshair;
}

.hud-power-chip {
  padding: 0.22rem 0.55rem;
  border-radius: 999px;
  background: rgba(23, 32, 57, 0.86);
  border: 1px solid rgba(98, 86, 201, 0.65);
  color: #F4F6FB;
  font-size: 0.72rem;
  font-weight: 700;
}

/* Survivor Modals */
.survivor-modal {
  max-width: 720px;
  width: min(94vw, 720px);
  max-height: 90vh;
  overflow-y: auto;
}

.boss-return-ribbon {
  margin-top: 0.75rem;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  background: rgba(242, 193, 78, 0.2);
  border: 1px solid var(--color-amber);
  color: var(--color-night);
  font-weight: 800;
  font-size: var(--fs-sm);
}

.powers-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(195px, 1fr));
  gap: 0.8rem;
  margin-top: 0.75rem;
}

.power-choice-card {
  display: grid;
  align-content: space-between;
  gap: 0.6rem;
  padding: 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  text-align: left;
  cursor: pointer;
  transition: transform 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}

.power-choice-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-violet);
  box-shadow: var(--shadow-sm);
}

.power-choice-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem;
}

.power-choice-card__icon {
  font-size: 1.5rem;
}

.power-choice-card__title {
  color: var(--color-night);
  font-family: var(--font-display);
  font-size: var(--fs-base);
  font-weight: 800;
}

.power-choice-card__desc {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
  line-height: 1.38;
}

/* ==========================================================================
   Expediente: Lo que dominas y lo que no (Barras de dominio y 4 Cajas)
   ========================================================================== */
.expediente-hero {
  border-left: 4px solid var(--color-amber);
}

.box-steps {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.box-step {
  display: inline-grid;
  place-items: center;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text-muted);
  font-size: 0.72rem;
  font-weight: 800;
}

.box-step--done {
  background: rgba(39, 138, 128, 0.16);
  border-color: var(--color-teal);
  color: var(--color-teal);
}

.box-step--active {
  background: var(--color-night);
  border-color: var(--color-amber);
  color: var(--color-amber);
  box-shadow: 0 0 0 2px rgba(242, 193, 78, 0.25);
}

.box-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 800;
}

.box-pill--1 { background: rgba(242, 193, 78, 0.24); color: var(--color-night); }
.box-pill--2 { background: rgba(98, 86, 201, 0.16); color: var(--color-violet); }
.box-pill--3 { background: rgba(39, 138, 128, 0.16); color: var(--color-teal); }
.box-pill--4 { background: rgba(23, 32, 57, 0.12); color: var(--color-night); }

.box-status-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: var(--fs-xs);
  font-weight: 700;
}

.box-status-tag--amber {
  background: rgba(242, 193, 78, 0.22);
  color: var(--color-night);
  border: 1px solid rgba(242, 193, 78, 0.55);
}

.box-status-tag--danger {
  background: rgba(242, 193, 78, 0.24);
  color: var(--color-night);
  border: 1px solid var(--color-amber);
}

.box-status-tag--violet {
  background: rgba(98, 86, 201, 0.12);
  color: var(--color-violet);
}

.box-status-tag--teal {
  background: rgba(39, 138, 128, 0.14);
  color: var(--color-teal);
}

.expediente-section {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding: 1.25rem 1.4rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-xs);
}

.expediente-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.expediente-section__head h2 {
  margin: 0.2rem 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  color: var(--color-night);
}

.boxes-legend,
.mastery-legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.legend-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 999px;
}

.legend-dot--red { background: var(--color-danger); }
.legend-dot--amber { background: var(--color-amber); }
.legend-dot--teal { background: var(--color-teal); }

.expediente-subject-card__right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.expediente-pct-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: 800;
}

.expediente-pct-badge--teal { background: rgba(39, 138, 128, 0.16); color: var(--color-teal); }
.expediente-pct-badge--amber { background: rgba(242, 193, 78, 0.25); color: var(--color-night); }
.expediente-pct-badge--danger { background: rgba(214, 69, 80, 0.15); color: var(--color-danger); }

.expediente-topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.6rem;
  padding-top: 0.5rem;
}

.expediente-topic-row__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: var(--fs-xs);
}

.expediente-topic-row__name {
  color: var(--color-night);
}

.expediente-topic-row__count {
  color: var(--color-text-muted);
  font-weight: 700;
}

.mastery-bar__fill--red { background: var(--color-danger); }
.boss-chest-eyebrow {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: rgba(242, 193, 78, 0.25);
  color: var(--color-night);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

/* Barras de dominio por materia y tema */
.expediente-subjects-list {
  display: grid;
  gap: 1rem;
}

.expediente-subject-card {
  display: grid;
  gap: 0.75rem;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}

.expediente-subject-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.expediente-subject-card__title {
  margin: 0.25rem 0 0.15rem;
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  color: var(--color-night);
}

.expediente-subject-card__sub {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
}

.mastery-bar {
  width: 100%;
  border-radius: 999px;
  background: rgba(23, 32, 57, 0.1);
  overflow: hidden;
}

.mastery-bar--sm { height: 7px; }

.mastery-bar__fill {
  height: 100%;
  border-radius: 999px;
  transition: width 0.25s ease;
}

.mastery-bar__fill--teal { background: var(--color-teal); }
.mastery-bar__fill--amber { background: var(--color-amber); }

.expediente-topic-row {
  display: grid;
  gap: 0.3rem;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

/* --- Responsive ------------------------------------------------------------ */
@media (max-width: 920px) {
  .topic-workspace,
  .admin-grid-two {
    grid-template-columns: 1fr;
  }
  .topic-sidebar {
    position: static;
  }
}

@media (max-width: 880px) {
  .auth-layout { grid-template-columns: 1fr; }
  .auth-hero { gap: 1.25rem; padding: 1.5rem 1.25rem 1.25rem; }
  .auth-hero__body h1 { max-width: none; font-size: 1.75rem; }
  .auth-hero__body p,
  .auth-features,
  .auth-hero__foot { display: none; }

}

@media (max-width: 760px) {
  .navbar { flex-wrap: wrap; gap: 0.6rem 0.75rem; }
  .navbar__user { margin-left: auto; }
  .navbar__stats { order: 3; width: 100%; margin-left: 0; }
  .stat { flex: 1; justify-content: center; }
  .user-name { display: none; }
  .fc-rating-grid,
  .summary-metrics {
    grid-template-columns: repeat(2, 1fr);
  }

}

@media (max-width: 420px) {
  .stat__label--long { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}