/* Examenes iMa — Design System v1.1 (tipografía sistemática) */
:root {
  /* Paleta */
  --bg:  #1b2232;
  --bg2: #242c3e;
  --bg3: #2b344a;
  --accent:       #38bdf8;
  --accent2:      #7dd3fc;
  --accent-glow:  rgba(56,189,248,0.12);
  --text:  #e5e9f0;
  --text2: #a3adc2;
  --text3: #6b7590;
  --border: #3a4358;
  --green:        #22c55e;
  --green-glow:   rgba(34,197,94,0.12);
  --green-border: rgba(34,197,94,0.35);
  --red:          #ef4444;
  --red-glow:     rgba(239,68,68,0.10);
  --red-border:   rgba(239,68,68,0.35);
  --amber:        #f59e0b;
  --amber-glow:   rgba(245,158,11,0.12);
  --amber-border: rgba(245,158,11,0.35);

  /* Tipografía — escala modular base 16px ratio 1.125 (Major Second)
     redondeada a px para nitidez en pantalla. Para móvil se reduce 1 paso. */
  --fs-eyebrow: 12px;   /* etiquetas pequeñas, meta */
  --fs-caption: 14px;   /* meta secundario */
  --fs-body:    16px;   /* texto general en cards */
  --fs-lead:    18px;   /* afirmaciones de examen, párrafos importantes */
  --fs-h3:      20px;   /* títulos de card */
  --fs-h2:      24px;   /* títulos de sección */
  --fs-h1:      32px;   /* títulos de pantalla */
  --fs-display: 40px;   /* score grande, hero */

  /* Line heights */
  --lh-tight:   1.25;
  --lh-snug:    1.45;
  --lh-normal:  1.6;
  --lh-relaxed: 1.75;

  /* Espaciados */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;
}

@media (max-width: 600px) {
  :root {
    --fs-body: 15px;
    --fs-lead: 17px;
    --fs-h3:   18px;
    --fs-h2:   22px;
    --fs-h1:   28px;
    --fs-display: 36px;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  -webkit-font-smoothing: antialiased;
  -webkit-user-select: none; user-select: none;
  min-height: 100vh;
  overscroll-behavior: none;
  position: relative;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    radial-gradient(circle at 20% 0%, rgba(56,189,248,0.06), transparent 50%),
    radial-gradient(circle at 80% 100%, rgba(56,189,248,0.04), transparent 50%);
  pointer-events: none;
}
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: url('brand/watermark-anatomy.png');
  background-repeat: no-repeat;
  background-position: center right -8%;
  background-size: min(560px, 70vw) auto;
  opacity: 0.07;
  pointer-events: none;
  mix-blend-mode: screen;
}
@media (max-width: 700px) {
  body::after {
    background-position: center bottom -10%;
    background-size: min(420px, 90vw) auto;
    opacity: 0.05;
  }
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent2); }

.container { max-width: 820px; margin: 0 auto; padding: 24px 20px; }
.container-wide { max-width: 1080px; }
@media (max-width: 600px) {
  .container { padding: 14px 12px; }
  .container-wide { padding: 12px 10px; }
}

.header {
  margin: 16px 0 28px;
  text-align: center;
}
.brand-logo {
  display: block;
  margin: 0 auto var(--sp-4);
  width: 64px; height: 64px;
  object-fit: contain;
  border-radius: 18px;
  box-shadow:
    0 8px 32px rgba(56,189,248,0.30),
    0 2px 8px rgba(0,0,0,0.25);
}
.header h1 {
  font-size: var(--fs-h1); font-weight: 800;
  line-height: var(--lh-tight); margin: 0;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent2) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.header .subtitle {
  font-size: var(--fs-caption); line-height: var(--lh-normal);
  color: var(--text2); margin-top: var(--sp-2);
}
.header .institut {
  font-size: var(--fs-eyebrow); letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text3);
  margin-top: var(--sp-1); font-weight: 600;
}

.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  margin-bottom: 16px;
  box-shadow: 0 1px 0 rgba(255,255,255,0.02) inset;
}
.card-elev {
  background: var(--bg3);
  border-color: var(--border);
}
.card h2 { font-size: var(--fs-h2); font-weight: 700; line-height: var(--lh-tight); margin: 0 0 var(--sp-3); color: var(--text); }
.card h3 { font-size: var(--fs-h3); font-weight: 700; line-height: var(--lh-snug); margin: 0 0 var(--sp-3); color: var(--text); }
.card p { font-size: var(--fs-body); line-height: var(--lh-relaxed); color: var(--text); margin: var(--sp-3) 0; }
.card ul, .card ol { font-size: var(--fs-body); line-height: var(--lh-relaxed); color: var(--text); padding-left: 22px; }
.card li { margin-bottom: var(--sp-2); }
.muted { color: var(--text2); font-size: var(--fs-caption); line-height: var(--lh-normal); }
.meta { color: var(--text3); font-size: var(--fs-eyebrow); line-height: var(--lh-normal); letter-spacing: 0.02em; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-2);
  background: var(--accent); color: #0d1620;
  border: none; padding: var(--sp-3) var(--sp-6);
  border-radius: 10px; font-size: var(--fs-body); font-weight: 700;
  cursor: pointer; transition: background 120ms ease, transform 60ms ease;
  -webkit-tap-highlight-color: transparent;
}
.btn:hover:not(:disabled) { background: var(--accent2); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-ghost {
  background: transparent; color: var(--accent);
  border: 1.5px solid var(--accent);
}
.btn-ghost:hover:not(:disabled) { background: var(--accent-glow); color: var(--accent2); border-color: var(--accent2); }
.btn-success { background: var(--green); color: #06160a; }
.btn-success:hover:not(:disabled) { background: #4ade80; }
.btn-danger { background: var(--red); color: #fff; }

input[type=text], input[type=email] {
  width: 100%; padding: var(--sp-3) var(--sp-4);
  background: var(--bg); color: var(--text);
  border: 1.5px solid var(--border); border-radius: 10px;
  font-size: var(--fs-lead); font-family: inherit;
  outline: none; transition: border-color 120ms ease;
}
input[type=text]:focus, input[type=email]:focus { border-color: var(--accent); }

.honor-box {
  background: var(--amber-glow);
  border-left: 3px solid var(--amber);
  padding: var(--sp-4) var(--sp-5);
  border-radius: 10px;
  margin: var(--sp-4) 0;
  font-size: var(--fs-body); line-height: var(--lh-relaxed);
  color: var(--text);
}

.statement {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  margin-bottom: 12px;
  display: flex; gap: 16px;
  flex-direction: column;
  transition: background 120ms ease, border-color 120ms ease;
}
@media (min-width: 700px) {
  .statement { flex-direction: row; align-items: center; }
}
.statement .text { flex: 1; font-size: var(--fs-lead); line-height: var(--lh-relaxed); }
/* Estados de revisión / corrección — pintados sobre el contenedor */
.statement.active-v {
  background: var(--green-glow);
  border-color: var(--green-border);
}
.statement.active-f {
  background: var(--red-glow);
  border-color: var(--red-border);
}
.statement.active-n {
  background: var(--bg2);
  border-color: var(--border);
}
.vf-group {
  display: flex; gap: 10px; flex-wrap: wrap;
}
.vf-btn {
  background: var(--bg);
  border: 1.5px solid var(--border);
  color: var(--text2);
  padding: var(--sp-3) var(--sp-5);
  border-radius: 10px;
  font-size: var(--fs-body); font-weight: 700;
  cursor: pointer;
  min-width: 72px;
  transition: all 100ms ease;
  -webkit-tap-highlight-color: transparent;
  letter-spacing: 0.02em;
}
.vf-btn:hover { border-color: var(--text2); color: var(--text); }
.vf-btn.active-v { background: var(--green); border-color: var(--green); color: #06160a; }
.vf-btn.active-f { background: var(--red); border-color: var(--red); color: #fff; }
.vf-btn.active-n { background: var(--bg3); border-color: var(--accent); color: var(--accent); }

.timer-bar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(43, 52, 74, 0.92);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: var(--sp-3) var(--sp-4);
  display: flex; justify-content: space-between; align-items: center;
  font-weight: 700;
}
.timer-bar .time { color: var(--accent); font-size: var(--fs-h3); font-variant-numeric: tabular-nums; }
.timer-bar .time.warn { color: var(--amber); }
.timer-bar .time.crit { color: var(--red); }
.timer-bar .progress { color: var(--text2); font-size: var(--fs-caption); }

.q-counter {
  display: inline-block;
  background: var(--accent-glow);
  color: var(--accent);
  padding: 4px 12px; border-radius: 999px;
  font-size: 12px; font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.nav-bar {
  display: flex; justify-content: space-between; gap: 12px;
  margin-top: 22px;
}
.nav-bar .grow { flex: 1; }

.score-display {
  font-size: 72px; font-weight: 800;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  text-align: center; line-height: 1;
  margin: var(--sp-6) 0 var(--sp-2);
  font-variant-numeric: tabular-nums;
}
.score-display.fail {
  background: linear-gradient(135deg, var(--red) 0%, #fca5a5 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.score-display.mid {
  background: linear-gradient(135deg, var(--amber) 0%, #fcd34d 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.score-display.pass {
  background: linear-gradient(135deg, var(--green) 0%, #86efac 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
@media (max-width: 600px) { .score-display { font-size: 56px; } }
.grade-display {
  text-align: center; font-size: var(--fs-h3); font-weight: 700;
  color: var(--text); margin-bottom: var(--sp-6);
  letter-spacing: 0.02em;
}
.grade-display.fail { color: var(--red); }
.grade-display.mid  { color: var(--amber); }
.grade-display.pass { color: var(--green); }
.card.result-fail { border: 1.5px solid var(--red-border); }
.card.result-mid  { border: 1.5px solid var(--amber-border); }
.card.result-pass { border: 1.5px solid var(--green-border); }

.banner {
  position: fixed; left: 0; right: 0; bottom: 0;
  background: var(--amber);
  color: #1a1106;
  padding: 12px 16px;
  text-align: center;
  font-size: 13px; font-weight: 600;
  z-index: 100;
  box-shadow: 0 -2px 12px rgba(0,0,0,0.3);
}
.banner.error { background: var(--red); color: white; }

.list-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.list-item:last-child { border-bottom: none; }
.list-item .info h3 { margin: 0 0 4px; font-size: 16px; }
.list-item .info .meta { font-size: 12px; }
.badge {
  display: inline-block;
  padding: 3px 10px; border-radius: 999px;
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.04em; text-transform: uppercase;
}
.badge-open { background: var(--green-glow); color: var(--green); border: 1px solid var(--green-border); }
.badge-closed { background: var(--accent-glow); color: var(--accent); border: 1px solid var(--accent); }
.badge-scheduled { background: var(--amber-glow); color: var(--amber); border: 1px solid var(--amber-border); }

.center-action { text-align: center; padding: 24px 0; }

.fade-in { animation: fadeIn 200ms ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

input[type=checkbox] {
  width: 20px; height: 20px;
  accent-color: var(--accent);
  margin-right: 8px;
  cursor: pointer;
}
label.checkbox-line {
  display: flex; align-items: center; cursor: pointer;
  font-size: 14px; line-height: 1.5; color: var(--text);
  padding: 8px 0;
}

.alert-msg {
  background: var(--red-glow);
  border-left: 3px solid var(--red);
  padding: 12px 14px;
  border-radius: 8px;
  margin: 12px 0;
  color: var(--text);
  font-size: 14px;
}
.alert-ok {
  background: var(--green-glow);
  border-left: 3px solid var(--green);
  padding: 12px 14px;
  border-radius: 8px;
  margin: 12px 0;
  color: var(--text);
  font-size: 14px;
}