* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Segoe UI', Tahoma, sans-serif;
  background: #eef2f7;
  color: #333;
}

/* ===== Sistema de pantallas ===== */
.screen { display: none; }
.screen.active { display: block; }

/* ===== LOGO ===== */
.logo-container { background: white; padding: 15px 20px; text-align: center; border-bottom: 3px solid #1e3c72; }
.logo-container-pdf { background: white; padding: 10px 20px; text-align: center; border-bottom: 2px solid #1e3c72; margin-bottom: 15px; }
.logo { max-width: 100%; max-height: 70px; object-fit: contain; }

/* ===== PANTALLA 1: DATOS ===== */
#screen-datos { min-height: 100vh; display: none; justify-content: center; align-items: center; padding: 20px; background: linear-gradient(135deg, #1e3c72, #2a5298); }
#screen-datos.active { display: flex; }
#screen-datos .container { background: white; border-radius: 12px; box-shadow: 0 20px 60px rgba(0,0,0,0.3); max-width: 700px; width: 100%; overflow: hidden; }
#screen-datos .header { background: #1e3c72; color: white; padding: 25px; text-align: center; }
#screen-datos .header h1 { font-size: 1.4em; margin-bottom: 8px; }
#screen-datos .header p { font-size: 0.95em; opacity: 0.9; }
#screen-datos .content { padding: 30px; }
.info-box { background: #f0f4f8; border-left: 4px solid #2a5298; padding: 15px; margin-bottom: 25px; border-radius: 6px; font-size: 0.9em; line-height: 1.6; }
.info-box strong { color: #1e3c72; }
.form-group { margin-bottom: 18px; }
label { display: block; font-weight: 600; color: #1e3c72; margin-bottom: 6px; font-size: 0.95em; }
input[type="text"], input[type="date"] { width: 100%; padding: 12px; border: 2px solid #d1d9e6; border-radius: 6px; font-size: 1em; transition: border 0.3s; }
input:focus { outline: none; border-color: #2a5298; }
.row { display: flex; gap: 15px; }
.row .form-group { flex: 1; }
.instructions { background: #fff8e1; border-left: 4px solid #f9a825; padding: 15px; margin: 20px 0; border-radius: 6px; font-size: 0.88em; line-height: 1.7; }
.instructions h3 { color: #f57f17; margin-bottom: 8px; font-size: 1em; }
.instructions ul { margin-left: 20px; }
.footer { background: #f0f4f8; padding: 15px; text-align: center; font-size: 0.85em; color: #555; }

/* ===== PANTALLA 2: PRUEBA ===== */
#screen-prueba { padding: 20px; }
.topbar { background: #1e3c72; color: white; padding: 15px 25px; border-radius: 10px; display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; flex-wrap: wrap; gap: 10px; max-width: 900px; margin-left: auto; margin-right: auto; }
.topbar .info { font-size: 0.9em; }
.timer { background: #f9a825; color: #1e3c72; padding: 8px 18px; border-radius: 20px; font-weight: 700; font-size: 1.1em; }
.timer.warning { background: #e53935; color: white; animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: 0.7; } }
.container-prueba { max-width: 900px; margin: 0 auto; }
.container { background: white; border-radius: 10px; padding: 30px; box-shadow: 0 5px 20px rgba(0,0,0,0.08); }
.cabecera-pdf { background: linear-gradient(135deg, #1e3c72, #2a5298); color: white; padding: 20px; border-radius: 8px; margin-bottom: 25px; text-align: center; }
.cabecera-pdf h1 { font-size: 1.3em; margin-bottom: 6px; border: none; color: white; padding: 0; }
.cabecera-pdf p { font-size: 0.95em; opacity: 0.95; margin-bottom: 12px; }
.datos-cabecera { display: flex; justify-content: center; gap: 25px; flex-wrap: wrap; font-size: 0.9em; background: rgba(255,255,255,0.15); padding: 10px; border-radius: 6px; margin-top: 10px; }
.datos-cabecera strong { color: #ffd54f; }
h2 { color: #1e3c72; border-bottom: 3px solid #2a5298; padding-bottom: 10px; margin: 25px 0 18px; font-size: 1.2em; }
h2:first-of-type { margin-top: 0; }
.question { background: #f8fafc; border-left: 4px solid #2a5298; padding: 15px 18px; margin-bottom: 15px; border-radius: 6px; }
.question p { font-weight: 600; margin-bottom: 10px; line-height: 1.5; }
.options label { display: block; padding: 8px 12px; margin: 5px 0; background: white; border: 2px solid #d1d9e6; border-radius: 5px; cursor: pointer; transition: all 0.2s; }
.options label:hover { border-color: #2a5298; background: #e8f0fb; }
.options input[type="radio"] { margin-right: 8px; }
.options input[type="radio"]:checked + span { font-weight: 600; color: #1e3c72; }
.options label:has(input:checked) { background: #e3f2fd; border-color: #2a5298; }
.match-table { width: 100%; border-collapse: collapse; margin-top: 10px; }
.match-table th, .match-table td { border: 1px solid #d1d9e6; padding: 10px; text-align: left; font-size: 0.92em; }
.match-table th { background: #1e3c72; color: white; }
.match-table select { width: 100%; padding: 6px; border: 1px solid #d1d9e6; border-radius: 4px; }
.word-bank { background: #fff8e1; border: 2px dashed #f9a825; padding: 12px; border-radius: 6px; margin-bottom: 15px; font-size: 0.9em; }
.word-bank strong { color: #f57f17; }
.fill-input { width: 100%; padding: 10px; border: 2px solid #d1d9e6; border-radius: 5px; font-size: 1em; margin-top: 8px; }

/* ===== PANTALLA 3: RESULTADOS ===== */
#screen-resultados { padding: 20px; }
.container-resultados { max-width: 1000px; margin: 0 auto; background: white; border-radius: 10px; padding: 30px; box-shadow: 0 5px 20px rgba(0,0,0,0.08); }
#screen-resultados .header { background: linear-gradient(135deg, #1e3c72, #2a5298); color: white; padding: 25px; border-radius: 10px; margin-bottom: 25px; text-align: center; }
#screen-resultados .header h1 { font-size: 1.5em; margin-bottom: 10px; }
.datos-alumno { background: #f0f4f8; padding: 15px; border-radius: 8px; margin-bottom: 20px; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; }
.datos-alumno div { font-size: 0.95em; }
.datos-alumno strong { color: #1e3c72; }
.score-card { background: linear-gradient(135deg, #43a047, #66bb6a); color: white; padding: 25px; border-radius: 10px; text-align: center; margin-bottom: 25px; }
.score-card.fail { background: linear-gradient(135deg, #e53935, #ef5350); }
.score-card.ok { background: linear-gradient(135deg, #fb8c00, #ffa726); }
.score-card .big { font-size: 3em; font-weight: 700; }
.score-card .label { font-size: 1.1em; opacity: 0.95; }

/* ===== RESUMEN VISUAL ===== */
.resumen-visual { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 15px; margin-bottom: 25px; }
.bloque-card { background: white; border-radius: 10px; padding: 18px; box-shadow: 0 3px 12px rgba(0,0,0,0.08); border-top: 5px solid #2a5298; transition: transform 0.2s; }
.bloque-card:hover { transform: translateY(-3px); }
.bloque-card .bloque-nombre { font-size: 0.85em; color: #666; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 8px; }
.bloque-card .bloque-puntuacion { font-size: 1.8em; font-weight: 700; color: #1e3c72; margin-bottom: 10px; }
.bloque-card .bloque-detalle { font-size: 0.85em; color: #555; margin-bottom: 12px; }
.barra-fondo { background: #e0e0e0; border-radius: 10px; height: 14px; overflow: hidden; position: relative; }
.barra-progreso { height: 100%; border-radius: 10px; transition: width 1s ease-out; background: linear-gradient(90deg, #43a047, #66bb6a); }
.barra-progreso.media { background: linear-gradient(90deg, #fb8c00, #ffa726); }
.barra-progreso.baja { background: linear-gradient(90deg, #e53935, #ef5350); }
.porcentaje { text-align: right; font-size: 0.85em; font-weight: 700; color: #1e3c72; margin-top: 6px; }

/* Tabla detalle */
table { width: 100%; border-collapse: collapse; margin-bottom: 20px; font-size: 0.92em; }
th, td { border: 1px solid #d1d9e6; padding: 10px; text-align: left; }
th { background: #1e3c72; color: white; }
tr:nth-child(even) { background: #f8fafc; }
.ok { color: #2e7d32; font-weight: 700; }
.ko { color: #c62828; font-weight: 700; }
.neutral { color: #757575; font-style: italic; }

/* ===== Botones comunes ===== */
.actions { display: flex; gap: 15px; margin-top: 30px; flex-wrap: wrap; }
.btn { flex: 1; padding: 14px; border: none; border-radius: 6px; font-size: 1em; font-weight: 600; cursor: pointer; transition: all 0.3s; min-width: 180px; }
.btn-final { background: linear-gradient(135deg, #2a5298, #1e3c72); color: white; font-size: 1.1em; padding: 16px; box-shadow: 0 4px 15px rgba(42, 82, 152, 0.3); }
.btn-final:hover { background: linear-gradient(135deg, #1e3c72, #0d2347); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(42, 82, 152, 0.4); }
.btn-pdf1 { background: #1e3c72; color: white; }
.btn-pdf1:hover { background: #0d2347; }
.btn-pdf2 { background: #2e7d32; color: white; }
.btn-pdf2:hover { background: #1b5e20; }