/* 
  css/student.css
  Diseño de máxima accesibilidad y alto contraste para estudiantes adolescentes con discapacidad visual
*/

:root {
    --bg-main: #0f141c;
    --bg-card: #18202d;
    --bg-card-alt: #1f2a3a;
    --text-primary: #ffffff;
    --text-secondary: #c5d2e0;
    --accent-yellow: #ffd600;
    --accent-cyan: #00e5ff;
    --accent-green: #00e676;
    --accent-red: #ff334b;
    --border-color: #2e3e54;
    --focus-ring: #ffd600;
    --font-stack: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* Modo Ultra Alto Contraste (Amarillo sobre negro puro) */
body.theme-ultra-contrast {
    --bg-main: #000000;
    --bg-card: #0a0a0a;
    --bg-card-alt: #141414;
    --text-primary: #ffff00;
    --text-secondary: #ffffff;
    --accent-yellow: #ffff00;
    --accent-cyan: #00ffff;
    --accent-green: #00ff66;
    --accent-red: #ff0033;
    --border-color: #ffff00;
    --focus-ring: #ffffff;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-stack);
    font-size: 20px;
    line-height: 1.6;
    min-height: 100vh;
    padding: 16px;
    display: flex;
    flex-direction: column;
}

/* Foco accesible ultra visible para navegación con teclado */
*:focus-visible {
    outline: 4px solid var(--focus-ring) !important;
    outline-offset: 4px !important;
}

/* Barra superior accesible */
.top-header {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 16px 24px;
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand .logo-icon {
    font-size: 2.2rem;
    background: var(--accent-yellow);
    color: #000;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-weight: 900;
}

.brand h1 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.brand .subtitle {
    font-size: 1rem;
    color: var(--accent-cyan);
    font-weight: 600;
}

.header-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
}

.student-tag {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-card-alt);
    padding: 8px 16px;
    border-radius: 12px;
    border: 2px solid var(--border-color);
    font-size: 1.05rem;
    color: var(--text-secondary);
}

.student-tag input {
    background: transparent;
    border: none;
    border-bottom: 2px dashed var(--accent-yellow);
    color: var(--accent-yellow);
    font-size: 1.1rem;
    font-weight: bold;
    padding: 2px 6px;
    width: 140px;
}

.btn-header {
    background: var(--bg-card-alt);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 10px 16px;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-header:hover {
    background: var(--border-color);
    border-color: var(--accent-cyan);
}

/* Barra de Estado en Vivo (Anunciador) */
.live-status-bar {
    background: #000;
    border: 2px solid var(--accent-cyan);
    border-radius: 12px;
    padding: 14px 20px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--accent-cyan);
}

.live-status-bar .pulse-dot {
    width: 16px;
    height: 16px;
    background: var(--accent-cyan);
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.9); opacity: 0.7; }
    50% { transform: scale(1.3); opacity: 1; }
    100% { transform: scale(0.9); opacity: 0.7; }
}

/* Layout Principal */
.main-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    flex: 1;
}

/* Tarjeta de la Actividad Educativa */
.activity-card {
    background: var(--bg-card);
    border: 3px solid var(--border-color);
    border-radius: 20px;
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.activity-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 16px;
}

.subject-badge {
    background: var(--accent-yellow);
    color: #000;
    font-size: 1.15rem;
    font-weight: 900;
    padding: 6px 16px;
    border-radius: 30px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.activity-counter {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--accent-cyan);
}

.activity-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.3;
}

/* Contenido de la Lección / Texto de lectura */
.lesson-box {
    background: var(--bg-card-alt);
    border-left: 6px solid var(--accent-yellow);
    border-radius: 12px;
    padding: 24px;
}

.lesson-box h3 {
    font-size: 1.3rem;
    color: var(--accent-yellow);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.lesson-text {
    font-size: 1.35rem;
    line-height: 1.8;
    color: var(--text-primary);
    transition: all 0.3s;
}

.lesson-text.reading-active {
    background: rgba(255, 214, 0, 0.12);
    border-radius: 8px;
    padding: 10px;
}

/* Cuadro de la Pregunta / Consigna */
.question-box {
    background: #002538;
    border: 3px dashed var(--accent-cyan);
    border-radius: 16px;
    padding: 24px;
}

.question-box h3 {
    font-size: 1.3rem;
    color: var(--accent-cyan);
    margin-bottom: 10px;
    text-transform: uppercase;
}

.question-text {
    font-size: 1.45rem;
    font-weight: 700;
    color: #ffffff;
    line-height: 1.6;
}

/* Panel de Grabación y Acción del Estudiante */
.actions-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 10px;
}

.buttons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

/* Botones Grandes de Interacción Sonora */
.btn-action {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 22px 24px;
    border-radius: 16px;
    font-size: 1.3rem;
    font-weight: 800;
    cursor: pointer;
    border: 3px solid transparent;
    transition: transform 0.15s, background-color 0.2s, box-shadow 0.2s;
    text-align: center;
    min-height: 80px;
}

.btn-action:hover {
    transform: translateY(-2px);
}

.btn-action:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
}

.btn-action .icon {
    font-size: 1.8rem;
}

.btn-read {
    background: #2563eb;
    color: #ffffff;
    border-color: #3b82f6;
}

.btn-read:hover:not(:disabled) {
    background: #1d4ed8;
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.4);
}

.btn-question {
    background: #0891b2;
    color: #ffffff;
    border-color: #06b6d4;
}

.btn-question:hover:not(:disabled) {
    background: #0e7490;
}

.btn-record {
    background: #dc2626;
    color: #ffffff;
    border-color: #ef4444;
}

.btn-record:hover:not(:disabled) {
    background: #b91c1c;
    box-shadow: 0 0 25px rgba(220, 38, 38, 0.5);
}

.btn-record.recording {
    background: #7f1d1d;
    border-color: #ff334b;
    animation: recordGlow 1.2s infinite alternate;
}

@keyframes recordGlow {
    from { box-shadow: 0 0 15px rgba(255, 51, 75, 0.6); }
    to { box-shadow: 0 0 35px rgba(255, 51, 75, 1); }
}

.btn-listen {
    background: #7c3aed;
    color: #ffffff;
    border-color: #8b5cf6;
}

.btn-listen:hover:not(:disabled) {
    background: #6d28d9;
}

.btn-save {
    background: #059669;
    color: #ffffff;
    border-color: #10b981;
}

.btn-save:hover:not(:disabled) {
    background: #047857;
    box-shadow: 0 0 25px rgba(16, 185, 129, 0.5);
}

/* Indicador de grabación en curso */
.recording-indicator {
    background: #2d0a0e;
    border: 3px solid var(--accent-red);
    border-radius: 14px;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 1.3rem;
    font-weight: 800;
    color: #ff7584;
}

.recording-indicator.hidden {
    display: none;
}

.rec-timer {
    font-family: monospace;
    font-size: 1.8rem;
    color: #ffffff;
    background: #500e16;
    padding: 4px 14px;
    border-radius: 8px;
}

/* Barra inferior de navegación */
.bottom-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 16px 24px;
    margin-top: 10px;
}

.btn-nav {
    background: var(--bg-card-alt);
    color: var(--text-primary);
    border: 3px solid var(--border-color);
    padding: 14px 28px;
    border-radius: 14px;
    font-size: 1.2rem;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-nav:hover:not(:disabled) {
    border-color: var(--accent-yellow);
    background: #28364b;
}

.btn-nav:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

/* Lista rápida de atajos de teclado accesible */
.shortcuts-footer {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    margin-top: 20px;
}

.shortcuts-footer h4 {
    font-size: 1.2rem;
    color: var(--accent-yellow);
    margin-bottom: 12px;
    text-transform: uppercase;
}

.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 10px;
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
    color: var(--text-secondary);
}

.kbd {
    background: #000;
    border: 2px solid var(--accent-cyan);
    color: var(--accent-cyan);
    padding: 4px 10px;
    border-radius: 6px;
    font-weight: 900;
    font-size: 0.95rem;
    font-family: monospace;
    min-width: 32px;
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    body { font-size: 18px; padding: 10px; }
    .activity-title { font-size: 1.7rem; }
    .lesson-text { font-size: 1.15rem; }
    .question-text { font-size: 1.25rem; }
    .btn-action { padding: 18px; font-size: 1.15rem; min-height: 70px; }
}

/* ========================================================
   BANNER Y BOTONES DE AUDIO DEL PROFESOR (ACCESIBLE)
   ======================================================== */
.teacher-audio-banner {
    background: #1e1b4b;
    border: 3px solid #818cf8;
    border-radius: 16px;
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 8px;
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.3);
    transition: all 0.3s;
}

.teacher-audio-header-row {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.teacher-audio-player-wrapper {
    background: #0f141c;
    border: 2px solid #6366f1;
    border-radius: 12px;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.5);
}

.teacher-audio-player-wrapper audio {
    width: 100%;
    height: 48px;
    outline: none;
}

.teacher-audio-banner.hidden {
    display: none !important;
}

.teacher-audio-icon {
    font-size: 2.2rem;
    background: #312e81;
    color: #ffd600;
    width: 54px;
    height: 54px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 2px solid #818cf8;
}

.teacher-audio-content {
    flex: 1;
}

.teacher-audio-title {
    font-size: 1.3rem;
    font-weight: 800;
    color: #c7d2fe;
    display: block;
    margin-bottom: 2px;
}

.teacher-audio-desc {
    font-size: 1.1rem;
    color: #e0e7ff;
    line-height: 1.4;
}

.teacher-audio-badge {
    background: #4f46e5;
    color: #ffffff;
    font-weight: 900;
    font-size: 0.95rem;
    padding: 6px 14px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

/* Botón estilo Audio del Profesor */
.btn-teacher-audio {
    background: #6366f1 !important;
    color: #ffffff !important;
    border-color: #a5b4fc !important;
}

.btn-teacher-audio:hover:not(:disabled) {
    background: #4f46e5 !important;
    box-shadow: 0 0 25px rgba(99, 102, 241, 0.5) !important;
}

/* Botón estilo IA fallback */
.btn-ai {
    background: #1e293b !important;
    color: var(--accent-cyan) !important;
    border-color: var(--accent-cyan) !important;
}

.btn-ai:hover:not(:disabled) {
    background: #0f172a !important;
    box-shadow: 0 0 20px rgba(0, 229, 255, 0.3) !important;
}

.btn-ai.hidden {
    display: none !important;
}

/* Adaptación para Ultra Alto Contraste */
body.theme-ultra-contrast .teacher-audio-banner {
    background: #000000;
    border-color: #ffff00;
}

body.theme-ultra-contrast .teacher-audio-icon {
    background: #000000;
    color: #ffff00;
    border-color: #ffff00;
}

body.theme-ultra-contrast .teacher-audio-title,
body.theme-ultra-contrast .teacher-audio-desc {
    color: #ffff00;
}

body.theme-ultra-contrast .teacher-audio-badge {
    background: #000000;
    border: 2px solid #ffff00;
    color: #ffff00;
}

body.theme-ultra-contrast .btn-teacher-audio {
    background: #000000 !important;
    border-color: #ffff00 !important;
    color: #ffff00 !important;
}

body.theme-ultra-contrast .btn-ai {
    background: #000000 !important;
    border-color: #00ffff !important;
    color: #00ffff !important;
}

/* Badge de Día */
.day-badge {
    background: #312e81;
    color: #e0e7ff;
    border: 2px solid #6366f1;
    font-size: 1.15rem;
    font-weight: 800;
    padding: 6px 16px;
    border-radius: 30px;
    letter-spacing: 0.5px;
}

/* Banner de Video de YouTube */
.youtube-banner {
    background: #1c1010;
    border: 3px solid #ef4444;
    border-radius: 18px;
    padding: 22px;
    margin-bottom: 24px;
    box-shadow: 0 8px 25px rgba(239, 68, 68, 0.25);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.youtube-banner.hidden {
    display: none !important;
}

.youtube-banner-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 14px;
}

.youtube-title {
    font-size: 1.4rem;
    font-weight: 800;
    color: #fca5a5;
    margin-bottom: 4px;
}

.youtube-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.btn-youtube {
    background: #dc2626 !important;
    color: #ffffff !important;
    border-color: #f87171 !important;
    width: auto !important;
    padding: 12px 24px !important;
    font-size: 1.1rem !important;
    font-weight: 800 !important;
}

.btn-youtube:hover:not(:disabled) {
    background: #b91c1c !important;
    box-shadow: 0 0 25px rgba(239, 68, 68, 0.6) !important;
}

body.theme-ultra-contrast .youtube-banner {
    background: #000000;
    border-color: #ff0000;
}

body.theme-ultra-contrast .btn-youtube {
    background: #000000 !important;
    border-color: #ff0000 !important;
    color: #ff0000 !important;
}

body.theme-ultra-contrast .day-badge {
    background: #000000;
    border-color: #00ffff;
    color: #00ffff;
}

/* ========================================================
   BARRA DE FILTRO DE DÍA (Lunes a Domingo / Hoy)
   ======================================================== */
.day-filter-nav {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 14px;
    padding: 12px 20px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.day-filter-label {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--accent-yellow);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.day-pills {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}

.day-pill {
    background: var(--bg-card-alt);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
}

.day-pill:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.day-pill.active {
    background: var(--accent-cyan);
    color: #000000;
    border-color: var(--accent-cyan);
    font-weight: 800;
    box-shadow: 0 0 14px rgba(6, 182, 212, 0.4);
}

.day-pill.today {
    border-color: var(--accent-yellow);
}

.day-pill.today.active {
    background: var(--accent-yellow);
    color: #000000;
    border-color: var(--accent-yellow);
    box-shadow: 0 0 14px rgba(250, 204, 21, 0.4);
}

/* ========================================================
   INSIGNIA DE ESTADO DE LECCIÓN (Realizada vs Pendiente)
   ======================================================== */
.lesson-status-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.badge-completed {
    background: #064e3b;
    color: #a7f3d0;
    border: 2px solid #10b981;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 1rem;
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.badge-pending {
    background: #451a03;
    color: #fde68a;
    border: 2px solid #f59e0b;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 1rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.already-answered-banner {
    background: #064e3b;
    border: 2px solid #10b981;
    border-radius: 12px;
    padding: 14px 20px;
    margin-top: 14px;
    margin-bottom: 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.already-answered-content {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #ecfdf5;
    font-size: 1.05rem;
}

.already-answered-icon {
    font-size: 1.8rem;
}

.btn-sm-audio {
    background: #10b981 !important;
    color: #000000 !important;
    border: 2px solid #34d399 !important;
    padding: 8px 16px !important;
    font-size: 0.95rem !important;
    font-weight: 800 !important;
    border-radius: 8px !important;
    cursor: pointer;
}

/* ========================================================
   OBSERVACIONES Y DEVOLUCIÓN DEL DOCENTE
   ======================================================== */
.teacher-feedback-card {
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
    border: 3px solid #818cf8;
    border-radius: 16px;
    padding: 22px 26px;
    margin-top: 18px;
    margin-bottom: 18px;
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.25);
    animation: fadeIn 0.4s ease;
}

.teacher-feedback-card.hidden {
    display: none !important;
}

.feedback-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.feedback-badge-tag {
    background: #818cf8;
    color: #0f172a;
    font-weight: 900;
    font-size: 0.85rem;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.feedback-title {
    font-size: 1.35rem;
    font-weight: 800;
    color: #e0e7ff;
    margin: 0;
}

.feedback-quote {
    background: rgba(15, 23, 42, 0.6);
    border-left: 6px solid #a5b4fc;
    border-radius: 8px;
    padding: 16px 20px;
    margin: 12px 0 16px 0;
    font-size: 1.25rem;
    font-style: italic;
    color: #f8fafc;
    line-height: 1.6;
}

.btn-hear-feedback {
    background: #6366f1 !important;
    color: #ffffff !important;
    border: 2px solid #c7d2fe !important;
    padding: 12px 22px !important;
    font-size: 1.1rem !important;
    font-weight: 800 !important;
    cursor: pointer;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: all 0.2s;
}

.btn-hear-feedback:hover {
    background: #4f46e5 !important;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.6);
}

/* ========================================================
   MODO ULTRA CONTRASTE PARA NUEVOS ELEMENTOS
   ======================================================== */
body.theme-ultra-contrast .day-filter-nav {
    background: #000;
    border-color: #ffff00;
}

body.theme-ultra-contrast .day-pill {
    background: #000;
    color: #fff;
    border-color: #fff;
}

body.theme-ultra-contrast .day-pill.active {
    background: #ffff00;
    color: #000;
    border-color: #ffff00;
}

body.theme-ultra-contrast .badge-completed {
    background: #000;
    color: #00ff00;
    border-color: #00ff00;
}

body.theme-ultra-contrast .badge-pending {
    background: #000;
    color: #ffff00;
    border-color: #ffff00;
}

body.theme-ultra-contrast .already-answered-banner {
    background: #000;
    border-color: #00ff00;
    color: #00ff00;
}

body.theme-ultra-contrast .teacher-feedback-card {
    background: #000;
    border-color: #ffff00;
}

body.theme-ultra-contrast .feedback-quote {
    background: #000;
    border-left-color: #ffff00;
    color: #ffff00;
}

body.theme-ultra-contrast .btn-hear-feedback {
    background: #000 !important;
    border-color: #ffff00 !important;
    color: #ffff00 !important;
}

/* ===== Ingreso del estudiante por DNI ===== */
.dni-login {
    position: fixed;
    inset: 0;
    z-index: 900;
    background: var(--bg-main);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    overflow-y: auto;
}

.dni-login[hidden] {
    display: none;
}

.dni-login-card {
    width: 100%;
    max-width: 560px;
    background: var(--bg-card);
    border: 3px solid var(--border-color);
    border-radius: 24px;
    padding: 36px 28px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    text-align: center;
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.6);
}

.dni-login-icon {
    font-size: 3.5rem;
}

.dni-login-title {
    font-size: 2.3rem;
    font-weight: 900;
    color: var(--accent-yellow);
}

.dni-login-help {
    font-size: 1.3rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.dni-login-label {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--text-primary);
    align-self: stretch;
    text-align: left;
}

.dni-login-input {
    width: 100%;
    font-size: 2.6rem;
    font-weight: 900;
    letter-spacing: 0.15em;
    text-align: center;
    padding: 14px;
    background: #000;
    color: var(--accent-yellow);
    border: 3px solid var(--accent-cyan);
    border-radius: 16px;
    font-variant-numeric: tabular-nums;
}

.dni-login-input::placeholder {
    color: #5b6b80;
    letter-spacing: normal;
    font-size: 1.6rem;
}

.dni-login-input:focus {
    outline: 4px solid var(--focus-ring);
    outline-offset: 3px;
}

.dni-login-btn {
    width: 100%;
    font-size: 1.6rem;
    font-weight: 900;
    padding: 16px;
    border-radius: 16px;
    border: none;
    background: var(--accent-yellow);
    color: #000;
    cursor: pointer;
}

.dni-login-btn:disabled {
    opacity: 0.6;
    cursor: wait;
}

.dni-login-btn:focus {
    outline: 4px solid var(--accent-cyan);
    outline-offset: 3px;
}

.dni-login-message {
    min-height: 1.6em;
    font-size: 1.2rem;
    font-weight: 800;
}

.dni-login-message.error {
    color: var(--accent-red);
}

.dni-login-message.success {
    color: var(--accent-green);
}

.dni-login-keys {
    font-size: 1rem;
    color: var(--text-secondary);
}

.dni-login-keys a {
    color: var(--accent-cyan);
}

.student-name-display {
    color: var(--accent-yellow);
    font-size: 1.1rem;
}

.btn-logout {
    background: transparent;
    border: 2px solid var(--accent-red);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 4px 10px;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
}

.btn-logout:hover, .btn-logout:focus {
    background: var(--accent-red);
}

@media (max-width: 480px) {
    .dni-login-card {
        padding: 28px 18px;
    }

    .dni-login-title {
        font-size: 1.8rem;
    }

    .dni-login-input {
        font-size: 2rem;
    }
}

/* Elementos ocultos por la aplicación (también quedan fuera del recorrido con Tab) */
.hidden {
    display: none !important;
}