/* =========================================================
   PAES M2 · Entrenador — Design tokens
   Concepto: "cuaderno de ecuaciones" — tinta sobre noche,
   con acentos que codifican dominio (verde) y debilidad (ámbar).
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  /* Color */
  --bg:          #10142B;
  --bg-panel:    #171C3B;
  --bg-panel-2:  #1F2547;
  --border:      #2A3060;
  --accent:      #5B8DFF;
  --accent-dim:  #3A54A8;
  --mastery:     #34D399;
  --weak:        #FBBF24;
  --danger:      #FB7185;
  --text:        #EDEFF9;
  --text-dim:    #9AA1C6;
  --text-faint:  #5B6293;

  /* Type */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;
  --font-mono:    'IBM Plex Mono', ui-monospace, monospace;

  /* Layout */
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.5);
  --grid-line: rgba(91, 141, 255, 0.06);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  min-height: 100vh;
}

/* Subtle graph-paper texture — nods to math notebooks without being literal */
body {
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
}

h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
}

.mono { font-family: var(--font-mono); }

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

button {
  font-family: var(--font-body);
  cursor: pointer;
}

/* Focus visibility (accessibility floor) */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--accent);
  color: #0A0D1F;
}
.btn-primary:hover { background: #7CA3FF; }

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent-dim); }

.btn-block { width: 100%; }

/* ---------- Form fields ---------- */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
  text-align: left;
}
.field label {
  font-size: 12px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.field input, .field select {
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 11px 14px;
  color: var(--text);
  font-size: 14px;
  font-family: var(--font-body);
  transition: border-color 0.15s ease;
}
.field input:focus, .field select:focus {
  border-color: var(--accent);
  outline: none;
}

.error-msg {
  color: var(--danger);
  font-size: 13px;
  margin-top: -8px;
  margin-bottom: 12px;
  min-height: 1em;
}

/* ---------- Auth page ---------- */
.auth-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.auth-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 32px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
}
.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), var(--mastery));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0A0D1F;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
}
.brand small {
  display: block;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 10px;
  color: var(--text-faint);
  letter-spacing: 0.04em;
}

.auth-main {
  flex: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  padding: 40px;
  align-items: center;
}

@media (max-width: 900px) {
  .auth-main { grid-template-columns: 1fr; padding: 24px; }
  .hero-equation { min-height: 260px; }
}

/* Signature element: animated equation transform */
.hero-equation {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  min-height: 420px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 18px;
  position: relative;
  overflow: hidden;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.eq-line {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.4vw, 34px);
  color: var(--text-faint);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.5s ease, transform 0.5s ease, color 0.5s ease;
}
.eq-line.active {
  opacity: 1;
  transform: translateY(0);
  color: var(--text);
}
.eq-line.solved {
  color: var(--mastery);
}
.eq-line .hl {
  color: var(--accent);
}
.eq-arrow {
  font-family: var(--font-mono);
  color: var(--text-faint);
  font-size: 20px;
  opacity: 0;
  transition: opacity 0.4s ease;
}
.eq-arrow.active { opacity: 1; }

.hero-caption {
  margin-top: 20px;
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.6;
  max-width: 42ch;
}
.hero-caption strong { color: var(--text); }

.auth-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow);
}

.auth-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-panel-2);
  border-radius: var(--radius);
  padding: 4px;
  margin-bottom: 24px;
}
.auth-tab {
  flex: 1;
  text-align: center;
  padding: 9px 0;
  border-radius: 7px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  background: transparent;
  border: none;
}
.auth-tab.active {
  background: var(--bg);
  color: var(--text);
}

.auth-card h2 {
  font-size: 20px;
  margin-bottom: 6px;
}
.auth-card .subtitle {
  color: var(--text-dim);
  font-size: 13px;
  margin-bottom: 24px;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-faint);
  font-size: 12px;
  margin: 18px 0;
}
.auth-divider::before, .auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ---------- App shell (dashboards) ---------- */
.app-shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}
@media (max-width: 760px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { display: none; }
}

.sidebar {
  border-right: 1px solid var(--border);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.sidebar .brand { padding: 0 8px 24px; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 500;
}
.nav-item:hover { background: var(--bg-panel); color: var(--text); }
.nav-item.active { background: var(--bg-panel-2); color: var(--text); }

.nav-footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.content {
  padding: 32px 40px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 28px;
}
.page-header h1 { font-size: 24px; }
.page-header .subtitle { color: var(--text-dim); font-size: 14px; margin-top: 4px; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.pill-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--mastery);
}

.card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.empty-state {
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  text-align: center;
  color: var(--text-dim);
}
.empty-state h3 { color: var(--text); margin-bottom: 8px; font-size: 16px; }
.empty-state p { font-size: 14px; max-width: 40ch; margin: 0 auto 20px; line-height: 1.6; }

.loading-line {
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 13px;
}

/* =========================================================
   MVP funcional: panel, práctica, banco y responsive
   ========================================================= */

button.nav-item {
  width: 100%;
  border: 0;
  background: transparent;
  text-align: left;
}
button.nav-item.active { background: var(--bg-panel-2); }

.field textarea,
.toolbar input,
.toolbar select {
  width: 100%;
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 11px 14px;
  color: var(--text);
  font: inherit;
  resize: vertical;
}
.field textarea:focus,
.toolbar input:focus,
.toolbar select:focus {
  border-color: var(--accent);
  outline: none;
}

.btn-small { padding: 8px 12px; font-size: 12px; }
.btn-danger {
  background: rgba(251, 113, 133, 0.12);
  border-color: rgba(251, 113, 133, 0.4);
  color: var(--danger);
}
.btn-danger:hover { background: rgba(251, 113, 133, 0.2); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.mobile-menu-btn {
  display: none;
  margin-bottom: 18px;
  background: var(--bg-panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 9px 13px;
}

.admin-panel,
.student-view { display: none; }
.admin-panel.active,
.student-view.active { display: block; }
.practice-runner[hidden] { display: none; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}
.stat-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  display: flex;
  flex-direction: column;
  min-height: 126px;
}
.stat-card span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: .05em;
}
.stat-card strong {
  font-family: var(--font-display);
  font-size: 30px;
  margin: 12px 0 4px;
}
.stat-card small { color: var(--text-dim); font-size: 12px; }

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 22px;
}
.dashboard-grid-main { grid-template-columns: minmax(0, 1.25fr) minmax(320px, .75fr); }
.accent-card {
  background:
    radial-gradient(circle at 90% 10%, rgba(52, 211, 153, .12), transparent 34%),
    linear-gradient(135deg, rgba(91, 141, 255, .14), transparent 62%),
    var(--bg-panel);
  border-color: rgba(91, 141, 255, .45);
}
.card h2 { font-size: 20px; margin: 5px 0 10px; }
.card p { color: var(--text-dim); font-size: 14px; line-height: 1.65; }
.card-kicker {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.inline-status { color: var(--text-dim); font-size: 13px; margin-left: 10px; }

.pipeline-list {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  display: grid;
  gap: 13px;
}
.pipeline-list li { display: flex; align-items: center; gap: 11px; color: var(--text-dim); font-size: 14px; }
.pipeline-list li span {
  width: 25px; height: 25px; flex: 0 0 25px;
  border-radius: 50%; display: grid; place-items: center;
  background: var(--bg-panel-2); color: var(--accent); font-family: var(--font-mono); font-size: 11px;
}

.section-card { margin-bottom: 24px; }
.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 20px;
}
.section-heading h2 { font-size: 21px; margin-top: 5px; }
.section-heading p { color: var(--text-dim); font-size: 14px; line-height: 1.55; margin: 6px 0 0; }
.compact-heading { margin-bottom: 14px; }

.upload-zone {
  display: flex;
  gap: 14px;
  align-items: end;
}
.field-grow { flex: 1; margin-bottom: 0; }
.upload-progress { display: grid; grid-template-columns: minmax(160px, 360px) auto; align-items: center; gap: 12px; color: var(--text-dim); font-size: 12px; }

.progress-track {
  width: 100%;
  height: 7px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--mastery));
  border-radius: inherit;
  transition: width .35s ease;
}
.weak-fill { background: linear-gradient(90deg, var(--danger), var(--weak)); }

.stack-list { display: grid; gap: 12px; }
.list-card,
.question-bank-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
}
.list-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.list-card-main { display: flex; align-items: center; gap: 14px; min-width: 0; }
.list-card-main h3 { font-size: 15px; overflow-wrap: anywhere; }
.list-card-main p { color: var(--text-dim); margin: 5px 0 0; font-size: 12px; }
.file-icon {
  width: 48px; height: 48px; flex: 0 0 48px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
}
.list-card-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.pill-dot.warning { background: var(--weak); }
.pill-dot.danger { background: var(--danger); }
.mini-error { color: var(--danger); font-size: 12px; margin-top: 7px; }
.error-banner {
  border: 1px solid rgba(251, 113, 133, .45);
  background: rgba(251, 113, 133, .08);
  color: var(--danger);
  padding: 14px;
  border-radius: var(--radius);
}

.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.form-grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.alternatives-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 14px; }
.check-row { display: flex; align-items: center; gap: 9px; color: var(--text-dim); font-size: 13px; margin: 4px 0 16px; }
.check-row input { accent-color: var(--accent); }

.toolbar {
  display: grid;
  grid-template-columns: 1fr 190px;
  gap: 12px;
  padding: 14px;
  margin-bottom: 14px;
}
.question-bank-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 14px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  display: inline-flex;
  padding: 4px 8px;
  border: 1px solid var(--border);
  background: var(--bg-panel-2);
  color: var(--text-dim);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10px;
}
.status-badge { font-family: var(--font-mono); font-size: 10px; border-radius: 999px; padding: 5px 9px; }
.status-badge.published { color: var(--mastery); background: rgba(52, 211, 153, .1); }
.status-badge.draft { color: var(--weak); background: rgba(251, 191, 36, .1); }
.bank-question-text { font-size: 16px; line-height: 1.65; margin: 16px 0 9px; }
.bank-answer { color: var(--text-dim); font-size: 12px; }
.question-bank-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 14px; }

/* ---------- Student dashboard ---------- */
.recommendation-card { min-height: 250px; display: flex; flex-direction: column; align-items: flex-start; }
.recommendation-card .btn { margin-top: auto; }
.progress-list { display: grid; gap: 17px; margin-top: 17px; }
.progress-row > div:first-child { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 7px; font-size: 12px; }
.progress-row span { color: var(--text-dim); }
.progress-row strong { font-family: var(--font-mono); font-size: 11px; }

.attempt-list { display: grid; gap: 6px; }
.attempt-row {
  display: grid;
  grid-template-columns: 32px 1fr;
  align-items: center;
  gap: 11px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(42, 48, 96, .65);
}
.attempt-row:last-child { border-bottom: 0; }
.attempt-row strong { display: block; font-size: 13px; font-weight: 500; line-height: 1.45; }
.attempt-row small { display: block; color: var(--text-faint); margin-top: 3px; }
.attempt-result { width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; font-weight: 700; }
.attempt-result.correct { background: rgba(52, 211, 153, .12); color: var(--mastery); }
.attempt-result.incorrect { background: rgba(251, 113, 133, .12); color: var(--danger); }
.empty-inline { color: var(--text-faint); font-size: 13px; padding: 14px 0; }

.setup-card { max-width: 760px; }
.setup-card h2 { font-size: 25px; }
.setup-card > p { max-width: 62ch; }
.chip-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0; }
.weak-chip {
  display: flex; flex-direction: column; gap: 4px;
  padding: 11px 13px;
  border: 1px solid rgba(251, 191, 36, .35);
  background: rgba(251, 191, 36, .07);
  border-radius: var(--radius);
}
.weak-chip strong { font-size: 12px; }
.weak-chip small { color: var(--weak); font-family: var(--font-mono); font-size: 10px; }

.skill-map { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.skill-card { background: var(--bg-panel); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 20px; }
.skill-card-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; }
.skill-card h3 { font-size: 16px; }
.skill-card-head strong { color: var(--accent); font-family: var(--font-mono); }
.skill-card p { color: var(--text-faint); font-size: 12px; margin: 11px 0 0; }

.table-like { display: grid; margin-top: 14px; }
.table-row { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 10px; padding: 12px 8px; border-bottom: 1px solid var(--border); font-size: 12px; align-items: center; }
.table-row span { color: var(--text-dim); }
.table-head { color: var(--text-faint); font-family: var(--font-mono); text-transform: uppercase; font-size: 10px; }

/* ---------- Question runner ---------- */
.practice-runner { max-width: 900px; margin: 0 auto; }
.runner-topbar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 18px;
  margin-bottom: 20px;
}
.runner-progress { display: grid; gap: 7px; }
.runner-progress > span { font-size: 12px; color: var(--text-dim); text-align: center; }
.question-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: clamp(22px, 4vw, 40px);
  box-shadow: var(--shadow);
}
.question-meta { display: flex; justify-content: space-between; gap: 15px; align-items: flex-start; }
.difficulty-dots { display: flex; gap: 4px; padding-top: 4px; }
.difficulty-dots i { width: 6px; height: 6px; border-radius: 50%; background: var(--border); }
.difficulty-dots i.filled { background: var(--weak); }
.question-text { font-family: var(--font-display); font-size: clamp(19px, 2.7vw, 27px); line-height: 1.55; margin: 30px 0; }
.answer-grid { display: grid; gap: 11px; }
.answer-option {
  width: 100%;
  display: grid;
  grid-template-columns: 37px 1fr;
  align-items: center;
  gap: 13px;
  text-align: left;
  padding: 13px 15px;
  border: 1px solid var(--border);
  background: var(--bg-panel-2);
  color: var(--text);
  border-radius: 12px;
  font-size: 15px;
  transition: border-color .15s ease, transform .15s ease, background .15s ease;
}
.answer-option:hover:not(:disabled) { border-color: var(--accent); transform: translateY(-1px); }
.answer-option > span { width: 31px; height: 31px; border-radius: 8px; display: grid; place-items: center; background: var(--bg); color: var(--accent); font-family: var(--font-mono); font-size: 12px; }
.answer-option.correct-answer { border-color: rgba(52, 211, 153, .7); background: rgba(52, 211, 153, .1); }
.answer-option.wrong-answer { border-color: rgba(251, 113, 133, .7); background: rgba(251, 113, 133, .1); }
.answer-option:disabled { cursor: default; opacity: .88; }

.feedback { margin-top: 22px; border-radius: 14px; padding: 18px; border: 1px solid; }
.feedback-correct { background: rgba(52, 211, 153, .07); border-color: rgba(52, 211, 153, .35); }
.feedback-wrong { background: rgba(251, 113, 133, .06); border-color: rgba(251, 113, 133, .32); }
.feedback-title { font-family: var(--font-display); font-size: 18px; color: var(--text); }
.feedback p, .feedback li { color: var(--text-dim); font-size: 14px; line-height: 1.65; }
.feedback ol { padding-left: 22px; }
.common-error { background: rgba(251, 191, 36, .08); border-left: 3px solid var(--weak); color: var(--text-dim); padding: 11px 13px; margin: 14px 0; font-size: 13px; line-height: 1.5; }

.session-result { text-align: center; padding: 22px 0 10px; }
.result-ring {
  width: 150px; height: 150px; border-radius: 50%; margin: 0 auto 22px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: radial-gradient(circle, var(--bg-panel) 55%, transparent 57%), conic-gradient(var(--mastery) 0 75%, var(--border) 75% 100%);
}
.result-ring strong { font-family: var(--font-display); font-size: 35px; }
.result-ring span { color: var(--text-faint); font-size: 11px; text-transform: uppercase; }
.session-result h2 { font-size: 28px; }
.session-result > p { color: var(--text-dim); max-width: 52ch; margin: 11px auto 18px; line-height: 1.6; }
.result-review { background: var(--bg-panel-2); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; color: var(--text-dim); font-size: 13px; }
.result-actions { display: flex; justify-content: center; gap: 10px; margin-top: 22px; }

@media (max-width: 1050px) {
  .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .form-grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dashboard-grid-main { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .app-shell { display: block; }
  .sidebar {
    display: flex;
    position: fixed;
    z-index: 50;
    inset: 0 auto 0 0;
    width: min(300px, 88vw);
    background: var(--bg);
    transform: translateX(-105%);
    transition: transform .2s ease;
    box-shadow: 18px 0 60px rgba(0,0,0,.45);
  }
  .sidebar.open { transform: translateX(0); }
  .mobile-menu-btn { display: inline-flex; }
  .content { padding: 20px 16px 34px; }
  .page-header { flex-direction: column; gap: 12px; }
  .stats-grid, .dashboard-grid, .skill-map, .form-grid, .form-grid-4, .alternatives-grid { grid-template-columns: 1fr; }
  .upload-zone, .list-card, .question-bank-top { align-items: stretch; flex-direction: column; }
  .list-card-actions { justify-content: flex-start; }
  .toolbar { grid-template-columns: 1fr; }
  .runner-topbar { grid-template-columns: auto 1fr; }
  .runner-topbar > .mono { grid-column: 1 / -1; text-align: center; }
  .question-card { padding: 20px 16px; }
  .question-meta { flex-direction: column; }
  .result-actions { flex-direction: column; }
  .table-row { grid-template-columns: 1.5fr repeat(3, .7fr); font-size: 11px; }
  .upload-progress { grid-template-columns: 1fr; }
}

/* ---------- Workers AI notice ---------- */
.ai-note {
  margin-top: 10px;
  padding: 11px 13px;
  border: 1px solid var(--accent-dim);
  border-radius: var(--radius);
  background: rgba(91, 141, 255, 0.08);
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.55;
}
.ai-note strong { color: var(--text); }

/* ---------- Contexto autosuficiente de preguntas ---------- */
.question-context {
  margin: 26px 0 8px;
  padding: 18px 20px;
  border: 1px solid rgba(91, 141, 255, .32);
  border-left: 4px solid var(--accent);
  border-radius: 14px;
  background: rgba(91, 141, 255, .07);
}
.question-context-label {
  margin-bottom: 10px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.question-context-body {
  color: var(--text);
  font-size: 15px;
  line-height: 1.72;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.bank-context {
  margin-top: 14px;
  padding: 13px 15px;
  border-radius: 10px;
  background: rgba(91, 141, 255, .06);
  border: 1px solid rgba(91, 141, 255, .22);
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.65;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.context-warning {
  margin-top: 12px;
  padding: 10px 12px;
  border: 1px solid rgba(251, 113, 133, .35);
  border-radius: 9px;
  background: rgba(251, 113, 133, .07);
  color: var(--danger);
  font-size: 12px;
}
.status-badge.context-incomplete {
  color: var(--danger);
  background: rgba(251, 113, 133, .1);
}