/* ============================================================
   FUTURUM SAPIENS — Dark Navy (identidad de marca, skill futurum-sapiens-brand)
   Copiado tal cual de assets/futurum-dark-navy.css. No se inventan colores nuevos aquí.
   ============================================================ */

:root {
  --c1:#134f5c; --c2:#45818e; --c3:#a2c4c9; --c4:#d5a6bd;
  --c5:#76a5af; --c6:#a64d79; --c7:#e2e8f0;

  --bg:    #060e10;
  --bg-2:  #0a1a1f;
  --card:  #0a1a1f;
  --panel: rgba(19,79,92,.10);
  --line:      rgba(162,196,201,.10);
  --line-soft: rgba(162,196,201,.08);
  --line-med:  rgba(162,196,201,.14);

  --primary:   #15677a;
  --secondary: #45818e;
  --accent:    #a64d79;
  --ink:       #e2e8f0;
  --ink-dim:   #8aacb0;
  --ink-mid:   #b5c9cc;
  --muted:     #8aacb0;
  --muted2:    #76a5af;

  --fs-font:    'Inter', system-ui, -apple-system, 'Segoe UI', Arial, sans-serif;
  --fs-display: 'Outfit', var(--fs-font);
  --fs-grad: linear-gradient(135deg, var(--c3), var(--c6));
}

* { box-sizing: border-box; }
body {
  margin: 0; font-family: var(--fs-font); color: var(--ink); line-height: 1.6;
  background-color: var(--bg);
  background-image:
    linear-gradient(rgba(162,196,201,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(162,196,201,.022) 1px, transparent 1px);
  background-size: 52px 52px;
  padding-top: 52px; padding-bottom: 38px;
  overflow-x: clip; max-width: 100%;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

.fs-brandbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  height: 52px; padding: 0 1.5rem; background: rgba(10,26,31,.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-soft); position: fixed; top: 0; left: 0; right: 0; z-index: 200; }
.fs-logo { height: 34px; width: auto; display: block; flex-shrink: 0; }
.fs-brandbar .fs-site { font-family: var(--fs-font); color: var(--c2); font-size: 11px; font-weight: 600;
  letter-spacing: .22em; text-transform: uppercase; flex-shrink: 0; }
.fs-brandbar .fs-site::before { content: '◆ '; opacity: .7; }

.fs-copyright { position: fixed; bottom: 0; left: 0; right: 0; background: rgba(10,26,31,.94); backdrop-filter: blur(8px);
  color: rgba(226,232,240,.55); text-align: center; padding: .45rem 1rem; font-size: .72rem;
  z-index: 200; border-top: 1px solid var(--line-soft); font-family: var(--fs-font); letter-spacing: .04em; }

.fs-kicker { font-family: var(--fs-font); font-size: 11px; font-weight: 600; letter-spacing: .3em;
  text-transform: uppercase; color: var(--c2); }
.fs-kicker::before { content: '◆ '; opacity: .7; }

.fs-card { background: var(--card); border: 1px solid var(--line-soft); border-radius: 18px; margin: 16px 0; padding: 18px 20px;
  transition: border-color .25s; }
.fs-card:hover { border-color: var(--line-med); }

.fs-btn { cursor: pointer; border: none; border-radius: 999px; padding: 9px 18px; font-weight: 700; font-size: 11px;
  letter-spacing: .14em; text-transform: uppercase; font-family: var(--fs-font); color: #fff;
  background: linear-gradient(135deg, var(--c2), var(--c1)); box-shadow: 0 0 16px rgba(69,129,142,.30); transition: all .25s; }
.fs-btn:hover { filter: brightness(1.12); box-shadow: 0 0 22px rgba(69,129,142,.50); }
.fs-btn--secondary { background: linear-gradient(135deg, var(--c2), #2f5a66); }
.fs-btn--accent    { background: linear-gradient(135deg, var(--c6), #7a3458); box-shadow: 0 0 16px rgba(166,77,121,.35); }
.fs-btn--soft { background: transparent; color: var(--c3); border: 1px solid var(--c2); box-shadow: none; }
.fs-btn--soft:hover { background: rgba(69,129,142,.16); color: var(--c7); filter: none; box-shadow: none; }
.fs-btn:disabled { opacity: .45; cursor: not-allowed; filter: none; box-shadow: none; }

.fs-muted  { color: var(--muted); }
.fs-faint  { color: rgba(162,196,201,.45); }
.fs-accent { color: var(--accent); }
.fs-grad { background: var(--fs-grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; font-weight: 800; }
strong, .fs-strong { color: var(--c4); }
a { color: var(--c3); }
a:hover { color: var(--c6); }

@media print { .fs-no-print { display: none !important; } }

/* ============================================================
   CUADERNO FOTOGRÁFICO — pantallas de la app (mobile-first, botones grandes)
   ============================================================ */

.cf-main { max-width: 640px; margin: 14px auto 0; padding: 0 14px 16px; }
.cf-oculto { display: none !important; }

.cf-hero { text-align: center; padding: 1.4rem 1rem 1rem; }
.cf-hero h1 { font-family: var(--fs-display); font-weight: 800; font-size: clamp(1.3rem, 5vw, 1.7rem);
  margin: 0 0 .3rem; }
.cf-hero p { color: var(--c4); margin: 0; font-size: .95rem; }

/* Barra de usuario (nombre + salir) */
.cf-topbar { display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 2px 0; font-size: .82rem; color: var(--ink-dim); }
.cf-topbar strong { color: var(--c7); }

/* Formularios grandes, cómodos para el dedo */
.cf-campo { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.cf-campo label { font-size: .78rem; color: var(--c3); font-weight: 600; letter-spacing: .03em; }
.cf-campo input, .cf-campo select {
  width: 100%; padding: 14px 16px; border-radius: 14px; border: 1px solid var(--line-med);
  background: rgba(19,79,92,.14); color: var(--c7); font-size: 1rem; font-family: inherit;
}
.cf-campo input:focus, .cf-campo select:focus { outline: none; border-color: var(--c2); box-shadow: 0 0 0 3px rgba(69,129,142,.22); }
.cf-campo input::placeholder { color: rgba(162,196,201,.45); }

.cf-btn-grande { width: 100%; padding: 16px; border-radius: 16px; font-size: .95rem; letter-spacing: .1em; }
.cf-fila-botones { display: flex; gap: 10px; flex-wrap: wrap; }
.cf-fila-botones .fs-btn { flex: 1; min-width: 140px; }

.cf-error { background: rgba(220,38,38,.12); border: 1px solid rgba(248,113,113,.4); color: #fca5a5;
  border-radius: 12px; padding: 10px 14px; font-size: .85rem; margin-bottom: 14px; }
.cf-aviso { background: rgba(69,129,142,.14); border: 1px solid var(--line-med); color: var(--c3);
  border-radius: 12px; padding: 10px 14px; font-size: .85rem; margin-bottom: 14px; }
.cf-exito { background: rgba(34,197,94,.10); border: 1px solid rgba(134,239,172,.35); color: #86efac;
  border-radius: 12px; padding: 10px 14px; font-size: .85rem; margin-bottom: 14px; }

/* Lista de cuadernos */
.cf-lista-cuadernos { display: flex; flex-direction: column; gap: 10px; }
.cf-cuaderno { display: flex; align-items: center; justify-content: space-between; gap: 10px;
  background: var(--bg-2); border: 1px solid var(--line-soft); border-radius: 16px; padding: 14px 16px;
  cursor: pointer; text-align: left; width: 100%; font-family: inherit; color: inherit; }
.cf-cuaderno:hover { border-color: var(--c2); }
.cf-cuaderno .nombre { font-weight: 700; color: var(--c7); font-size: 1rem; }
.cf-cuaderno .detalle { font-size: .78rem; color: var(--ink-dim); margin-top: 2px; }
.cf-cuaderno .flecha { color: var(--c2); font-size: 1.2rem; }

/* Captura de cámara */
.cf-captura { text-align: center; }
.cf-captura input[type="file"] { display: none; }
.cf-boton-camara { display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 10px; width: 100%; padding: 40px 16px; border-radius: 20px; border: 2px dashed var(--line-med);
  background: rgba(19,79,92,.08); color: var(--c3); cursor: pointer; font-weight: 700; letter-spacing: .08em; }
.cf-boton-camara:hover { border-color: var(--c2); background: rgba(19,79,92,.16); }
.cf-boton-camara .icono { font-size: 2.4rem; }
.cf-previa { max-width: 100%; border-radius: 16px; border: 1px solid var(--line-med); margin: 14px 0; }

/* Miniaturas de páginas ya guardadas */
.cf-paginas { display: grid; grid-template-columns: repeat(auto-fill, minmax(84px, 1fr)); gap: 8px; margin: 14px 0; }
.cf-pagina { position: relative; border-radius: 10px; overflow: hidden; border: 1px solid var(--line-soft); background: var(--bg-2); }
.cf-pagina img { width: 100%; aspect-ratio: 3/4; object-fit: cover; display: block; }
.cf-pagina .num { position: absolute; bottom: 2px; right: 4px; font-size: .65rem; background: rgba(6,14,16,.75); color: var(--c7); padding: 1px 5px; border-radius: 6px; }
.cf-pagina .borrar { position: absolute; top: 2px; right: 2px; background: rgba(166,77,121,.85); color: #fff;
  border: none; border-radius: 999px; width: 20px; height: 20px; font-size: .7rem; cursor: pointer; line-height: 1; }
.cf-pagina .ver-texto { position: absolute; top: 2px; left: 2px; background: rgba(21,103,122,.9); color: #fff;
  border: none; border-radius: 999px; width: 20px; height: 20px; font-size: .68rem; cursor: pointer; line-height: 1; }

/* Panel de texto extraído (OCR) de una página */
.cf-texto-contenido { white-space: pre-wrap; font-family: var(--fs-font); font-size: .88rem;
  color: var(--ink-mid); max-height: 320px; overflow-y: auto; margin: 0 0 12px; padding: 12px 14px;
  background: rgba(19,79,92,.10); border: 1px solid var(--line-soft); border-radius: 12px; }

.cf-progreso { display: flex; align-items: center; gap: 8px; font-size: .8rem; color: var(--muted); }
.cf-spinner { width: 16px; height: 16px; border-radius: 50%; border: 2px solid var(--line-med); border-top-color: var(--c2); animation: cf-girar .8s linear infinite; flex-shrink: 0; }
@keyframes cf-girar { to { transform: rotate(360deg); } }

/* Panel de profesor: acordeón de alumnos */
.cf-alumno { border: 1px solid var(--line-soft); border-radius: 16px; margin-bottom: 10px; overflow: hidden; }
.cf-alumno > summary { list-style: none; cursor: pointer; padding: 14px 16px; display: flex; justify-content: space-between;
  align-items: center; font-weight: 700; color: var(--c7); background: var(--bg-2); }
.cf-alumno > summary::-webkit-details-marker { display: none; }
.cf-alumno > summary .badge { font-size: .72rem; color: var(--c3); font-weight: 600; }
.cf-alumno .cf-lista-cuadernos { padding: 10px 12px 14px; }

@media (max-width: 480px) {
  .cf-fila-botones .fs-btn { min-width: 100%; }
}