@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&family=Inter:wght@400;500;600&display=swap');

:root {
  --morado-1: #7c3aed;
  --morado-2: #a855f7;
  --morado-3: #c084fc;
  --fondo-oscuro: #0a0714;
  --texto: #F4F1FB;
  --texto-suave: #B9AFD1;
  --vidrio-bg: rgba(255, 255, 255, 0.06);
  --vidrio-borde: rgba(255, 255, 255, 0.14);
  --exito: #4ADE80;
  --error: #F87171;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100vh;
}

body {
  font-family: 'Inter', -apple-system, sans-serif;
  color: var(--texto);
  background: var(--fondo-oscuro);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 900px 700px at 75% 8%, rgba(168, 85, 247, 0.55), transparent 60%),
    radial-gradient(ellipse 700px 900px at 15% 85%, rgba(124, 58, 237, 0.45), transparent 60%),
    radial-gradient(ellipse 600px 500px at 90% 90%, rgba(192, 132, 252, 0.30), transparent 65%),
    var(--fondo-oscuro);
  pointer-events: none;
}

.nav {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 32px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 1.05rem;
}
.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: 1.5px solid var(--morado-3);
  border-radius: 7px;
  color: var(--morado-3);
  font-size: 0.9rem;
  transform: rotate(45deg);
}
.logo-icon span { transform: rotate(-45deg); display: block; }
.nav-tag {
  font-size: 0.82rem;
  color: var(--texto-suave);
  font-style: italic;
}

main.hero {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 24px 16px 40px;
}

.tarjeta {
  width: 100%;
  max-width: 460px;
  background: var(--vidrio-bg);
  border: 1px solid var(--vidrio-borde);
  border-radius: 20px;
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  padding: 32px 30px 26px;
}

.tarjeta h2 {
  margin: 0 0 4px;
  font-family: 'Poppins', sans-serif;
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.tarjeta .subtitulo {
  margin: 0 0 22px;
  color: var(--texto-suave);
  font-size: 0.9rem;
}

form label {
  display: block;
  margin: 14px 0 6px;
  font-size: 0.85rem;
  color: var(--texto-suave);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

form input[type="text"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--vidrio-borde);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--texto);
  font-family: inherit;
  font-size: 0.95rem;
}
form input[type="text"]::placeholder { color: rgba(244, 241, 251, 0.35); }
form input[type="text"]:focus {
  outline: none;
  border-color: var(--morado-3);
  background: rgba(255, 255, 255, 0.08);
}

input::-webkit-calendar-picker-indicator { filter: invert(1); }

.combo {
  position: relative;
}
.combo input[type="text"] {
  padding-right: 34px;
}
.combo-flecha {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--texto-suave);
  font-size: 0.9rem;
  cursor: pointer;
  padding: 6px 8px;
  line-height: 1;
}
.combo-flecha:hover { color: var(--morado-3); }

.combo-lista {
  position: absolute;
  z-index: 5;
  left: 0;
  right: 0;
  margin: 6px 0 0;
  padding: 6px;
  list-style: none;
  max-height: 220px;
  overflow-y: auto;
  background: rgba(20, 14, 34, 0.97);
  border: 1px solid var(--vidrio-borde);
  border-radius: 10px;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  display: none;
}
.combo-lista.abierta { display: block; }
.combo-lista li {
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 0.9rem;
  color: var(--texto);
  cursor: pointer;
}
.combo-lista li:hover { background: rgba(168, 85, 247, 0.18); }
.combo-lista .combo-vacio {
  color: var(--texto-suave);
  font-style: italic;
  cursor: default;
}
.combo-lista .combo-vacio:hover { background: none; }

.alumno-guardado {
  margin: 14px 0 0;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--vidrio-borde);
  border-radius: 8px;
  font-size: 0.88rem;
  color: var(--texto);
}
.alumno-guardado a {
  color: var(--morado-3);
  font-weight: 600;
  text-decoration: none;
}
.alumno-guardado a:hover { text-decoration: underline; }

.checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 0.88rem;
  color: var(--texto-suave);
  text-transform: none;
  letter-spacing: normal;
}
.checkbox input { width: auto; }

.adjunto {
  margin-top: 18px;
  border: 1px dashed var(--vidrio-borde);
  border-radius: 10px;
  padding: 14px;
  text-align: center;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.adjunto.arrastrando {
  border-color: var(--morado-3);
  background: rgba(168, 85, 247, 0.08);
}
.adjunto p {
  margin: 0 0 8px;
  font-size: 0.85rem;
  color: var(--texto-suave);
}
.adjunto-boton {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--morado-3);
  color: var(--morado-3);
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  background: transparent;
}
.adjunto-boton:hover { background: rgba(168, 85, 247, 0.12); }
.adjunto-info {
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--texto);
}
.adjunto-info a {
  color: var(--error);
  text-decoration: none;
  font-weight: 600;
  margin-left: 8px;
}
.nota-combinado {
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--morado-3);
}

button#btn-generar {
  margin-top: 22px;
  width: 100%;
  padding: 13px;
  background: linear-gradient(135deg, var(--morado-1), var(--morado-2));
  color: white;
  border: none;
  border-radius: 24px;
  font-family: 'Poppins', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(124, 58, 237, 0.35);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
button#btn-generar:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 10px 28px rgba(124, 58, 237, 0.5);
}
button#btn-generar:disabled {
  background: rgba(255, 255, 255, 0.12);
  color: var(--texto-suave);
  box-shadow: none;
  cursor: not-allowed;
}

.estado {
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--texto-suave);
}
.estado.exito { color: var(--exito); font-weight: 600; }
.estado.error { color: var(--error); font-weight: 600; }

.descargas { margin-top: 8px; }
.fila-descarga {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.boton-descarga {
  display: inline-block;
  padding: 9px 16px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--morado-3);
  color: var(--texto);
  border-radius: 20px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.88rem;
}
.boton-descarga:hover { background: rgba(168, 85, 247, 0.18); }

.boton-guardar-como {
  display: inline-block;
  padding: 9px 16px;
  background: transparent;
  border: 1px solid var(--vidrio-borde);
  color: var(--texto-suave);
  border-radius: 20px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
}
.boton-guardar-como:hover { border-color: var(--morado-3); color: var(--texto); }

.pie {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 16px;
  font-size: 0.8rem;
  font-style: italic;
  color: var(--texto-suave);
}