/* ============================================
   LECTURAS ARENALINAS - Estilos Principales
   Colores: Azul oscuro #0a1628, Celeste #00b4d8
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@300;400;500;600;700&family=Nunito:wght@300;400;500;600;700;800&display=swap');

:root {
    --azul-oscuro: #0a1628;
    --azul-medio: #1b2d4f;
    --azul-claro: #2a4a7f;
    --celeste: #00b4d8;
    --celeste-light: #48cae4;
    --celeste-dark: #0096c7;
    --dorado: #fbbf24;
    --dorado-light: #fcd34d;
    --verde: #10b981;
    --verde-light: #34d399;
    --rojo: #ef4444;
    --naranja: #f97316;
    --blanco: #ffffff;
    --gris-50: #f8fafc;
    --gris-100: #f1f5f9;
    --gris-200: #e2e8f0;
    --gris-300: #cbd5e1;
    --gris-500: #64748b;
    --gris-700: #334155;
    --gris-900: #0f172a;
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.2);
    --shadow-glow: 0 0 20px rgba(0,180,216,0.3);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Nunito', sans-serif;
    background: var(--gris-50);
    color: var(--gris-900);
    min-height: 100vh;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Fredoka', sans-serif;
}

a {
    text-decoration: none;
    color: inherit;
}

/* ========================
   LOGIN PAGE
   ======================== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--azul-oscuro) 0%, var(--azul-medio) 50%, var(--azul-claro) 100%);
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0,180,216,0.15) 0%, transparent 70%);
    top: -100px;
    right: -100px;
    border-radius: 50%;
    animation: floatBubble 8s ease-in-out infinite;
}

.login-page::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(251,191,36,0.1) 0%, transparent 70%);
    bottom: -100px;
    left: -100px;
    border-radius: 50%;
    animation: floatBubble 10s ease-in-out infinite reverse;
}

@keyframes floatBubble {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.1); }
}

.login-container {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    padding: 50px 40px;
    width: 100%;
    max-width: 440px;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 1;
    text-align: center;
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-logo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 15px;
    border: 4px solid var(--celeste);
    box-shadow: var(--shadow-glow);
}

.login-title {
    font-size: 28px;
    color: var(--azul-oscuro);
    margin-bottom: 5px;
}

.login-subtitle {
    color: var(--gris-500);
    font-size: 14px;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--azul-medio);
    margin-bottom: 6px;
    font-size: 14px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gris-200);
    border-radius: var(--radius-md);
    font-size: 15px;
    font-family: 'Nunito', sans-serif;
    transition: var(--transition);
    background: var(--blanco);
}

.form-control:focus {
    outline: none;
    border-color: var(--celeste);
    box-shadow: 0 0 0 3px rgba(0,180,216,0.15);
}

.form-control::placeholder {
    color: var(--gris-300);
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-family: 'Fredoka', sans-serif;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--celeste) 0%, var(--celeste-dark) 100%);
    color: var(--blanco);
    width: 100%;
    padding: 14px;
    font-size: 17px;
    box-shadow: 0 4px 15px rgba(0,180,216,0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,180,216,0.5);
}

.btn-secondary {
    background: var(--gris-100);
    color: var(--azul-medio);
    border: 2px solid var(--gris-200);
}

.btn-secondary:hover {
    background: var(--gris-200);
}

.btn-success {
    background: linear-gradient(135deg, var(--verde) 0%, #059669 100%);
    color: var(--blanco);
}

.btn-warning {
    background: linear-gradient(135deg, var(--dorado) 0%, #d97706 100%);
    color: var(--azul-oscuro);
}

.btn-danger {
    background: linear-gradient(135deg, var(--rojo) 0%, #dc2626 100%);
    color: var(--blanco);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 18px;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-full);
    font-size: 18px;
}

/* ========================
   LAYOUT PRINCIPAL
   ======================== */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* SIDEBAR */
.sidebar {
    width: 280px;
    background: linear-gradient(180deg, var(--azul-oscuro) 0%, var(--azul-medio) 100%);
    color: var(--blanco);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    overflow-y: auto;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 25px 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-logo {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--celeste);
    margin-bottom: 10px;
}

.sidebar-brand {
    font-family: 'Fredoka', sans-serif;
    font-size: 20px;
    color: var(--celeste-light);
}

.sidebar-user {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--celeste);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.sidebar-user-info {
    overflow: hidden;
}

.sidebar-user-name {
    font-weight: 700;
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-role {
    font-size: 12px;
    color: var(--celeste-light);
    text-transform: capitalize;
}

/* Nivel y XP en sidebar */
.sidebar-level {
    padding: 15px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.level-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.level-icon {
    font-size: 24px;
}

.level-info {
    flex: 1;
}

.level-name {
    font-size: 12px;
    color: var(--dorado);
    font-weight: 700;
}

.level-number {
    font-size: 11px;
    color: var(--gris-300);
}

.xp-bar {
    width: 100%;
    height: 6px;
    background: rgba(255,255,255,0.15);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.xp-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--dorado), var(--dorado-light));
    border-radius: var(--radius-full);
    transition: width 0.8s ease;
}

.xp-text {
    font-size: 10px;
    color: var(--gris-300);
    margin-top: 4px;
    text-align: right;
}

/* Nav links */
.sidebar-nav {
    padding: 15px 0;
    flex: 1;
}

.nav-section-title {
    padding: 10px 20px 5px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--gris-500);
    font-weight: 700;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--gris-300);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.nav-link:hover {
    background: rgba(0,180,216,0.1);
    color: var(--blanco);
    border-left-color: var(--celeste);
}

.nav-link.active {
    background: rgba(0,180,216,0.15);
    color: var(--celeste-light);
    border-left-color: var(--celeste);
}

.nav-link-icon {
    width: 22px;
    text-align: center;
    font-size: 18px;
}

.nav-badge {
    margin-left: auto;
    background: var(--rojo);
    color: var(--blanco);
    font-size: 11px;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-weight: 700;
}

.sidebar-footer {
    padding: 15px 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

/* MAIN CONTENT */
.main-content {
    flex: 1;
    margin-left: 280px;
    transition: var(--transition);
}

/* TOPBAR */
.topbar {
    background: var(--blanco);
    padding: 15px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 15px;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--azul-oscuro);
    padding: 5px;
}

.page-title {
    font-size: 22px;
    color: var(--azul-oscuro);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.notification-btn {
    position: relative;
    background: none;
    border: none;
    font-size: 22px;
    cursor: pointer;
    color: var(--gris-500);
    padding: 8px;
    border-radius: var(--radius-full);
    transition: var(--transition);
}

.notification-btn:hover {
    background: var(--gris-100);
    color: var(--azul-oscuro);
}

.notification-count {
    position: absolute;
    top: 2px;
    right: 2px;
    background: var(--rojo);
    color: var(--blanco);
    font-size: 10px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.racha-display {
    display: flex;
    align-items: center;
    gap: 5px;
    background: linear-gradient(135deg, #fff7ed, #ffedd5);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-weight: 700;
    color: var(--naranja);
    font-size: 14px;
}

.puntos-display {
    display: flex;
    align-items: center;
    gap: 5px;
    background: linear-gradient(135deg, #fefce8, #fef9c3);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-weight: 700;
    color: #a16207;
    font-size: 14px;
}

/* CONTENT AREA */
.content-area {
    padding: 25px 30px;
}

/* ========================
   DASHBOARD CARDS
   ======================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--blanco);
    border-radius: var(--radius-lg);
    padding: 22px;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
    border: 1px solid var(--gris-100);
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    flex-shrink: 0;
}

.stat-icon.blue { background: linear-gradient(135deg, #dbeafe, #bfdbfe); }
.stat-icon.green { background: linear-gradient(135deg, #d1fae5, #a7f3d0); }
.stat-icon.yellow { background: linear-gradient(135deg, #fef3c7, #fde68a); }
.stat-icon.red { background: linear-gradient(135deg, #fee2e2, #fecaca); }
.stat-icon.purple { background: linear-gradient(135deg, #e9d5ff, #d8b4fe); }
.stat-icon.cyan { background: linear-gradient(135deg, #cffafe, #a5f3fc); }

.stat-value {
    font-size: 28px;
    font-family: 'Fredoka', sans-serif;
    font-weight: 700;
    color: var(--azul-oscuro);
    line-height: 1;
}

.stat-label {
    font-size: 13px;
    color: var(--gris-500);
    margin-top: 2px;
}

/* ========================
   CARDS GENERALES
   ======================== */
.card {
    background: var(--blanco);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gris-100);
    overflow: hidden;
    margin-bottom: 20px;
}

.card-header {
    padding: 18px 22px;
    border-bottom: 1px solid var(--gris-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 18px;
    color: var(--azul-oscuro);
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-body {
    padding: 22px;
}

.card-footer {
    padding: 15px 22px;
    border-top: 1px solid var(--gris-100);
    background: var(--gris-50);
}

/* ========================
   LECTURA CARD (Semanas)
   ======================== */
.lecturas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.lectura-card {
    background: var(--blanco);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gris-100);
    overflow: hidden;
    transition: var(--transition);
    position: relative;
}

.lectura-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.lectura-card.completada {
    border-color: var(--verde);
}

.lectura-card.completada::after {
    content: '✅';
    position: absolute;
    top: 12px;
    right: 12px;
    font-size: 24px;
}

.lectura-card.bloqueada {
    opacity: 0.6;
    filter: grayscale(0.5);
}

.lectura-semana-badge {
    background: linear-gradient(135deg, var(--celeste) 0%, var(--celeste-dark) 100%);
    color: var(--blanco);
    padding: 10px 18px;
    font-family: 'Fredoka', sans-serif;
    font-size: 14px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.lectura-tipo-badge {
    background: rgba(255,255,255,0.2);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 11px;
}

.lectura-card-body {
    padding: 18px;
}

.lectura-titulo {
    font-size: 17px;
    font-weight: 700;
    color: var(--azul-oscuro);
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.lectura-autor {
    font-size: 13px;
    color: var(--gris-500);
    margin-bottom: 12px;
}

.lectura-meta {
    display: flex;
    gap: 15px;
    font-size: 12px;
    color: var(--gris-500);
}

.lectura-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.lectura-card-footer {
    padding: 12px 18px;
    border-top: 1px solid var(--gris-100);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ========================
   LECTOR DE TEXTO
   ======================== */
.reader-container {
    max-width: 800px;
    margin: 0 auto;
}

.reader-header {
    text-align: center;
    margin-bottom: 30px;
}

.reader-title {
    font-size: 28px;
    color: var(--azul-oscuro);
    margin-bottom: 8px;
}

.reader-meta {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    color: var(--gris-500);
    font-size: 14px;
}

.reader-body {
    background: var(--blanco);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-sm);
    line-height: 1.9;
    font-size: 17px;
    color: var(--gris-700);
    margin-bottom: 25px;
    border: 1px solid var(--gris-100);
}

.reader-timer {
    position: sticky;
    bottom: 20px;
    background: var(--azul-oscuro);
    color: var(--blanco);
    padding: 12px 25px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    max-width: 500px;
    margin: 0 auto;
    box-shadow: var(--shadow-lg);
    font-family: 'Fredoka', sans-serif;
}

.timer-value {
    font-size: 22px;
    color: var(--celeste-light);
    font-weight: 700;
}

.reader-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.audio-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--azul-medio), var(--azul-oscuro));
    color: var(--blanco);
    padding: 10px 20px;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    font-family: 'Nunito', sans-serif;
    font-weight: 600;
    transition: var(--transition);
}

.audio-btn:hover {
    transform: scale(1.05);
}

.intentos-badge {
    background: rgba(0,180,216,0.1);
    color: var(--celeste-dark);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
}

/* ========================
   TEST DE COMPRENSIÓN
   ======================== */
.test-container {
    max-width: 800px;
    margin: 0 auto;
}

.test-progress {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 25px;
}

.test-progress-bar {
    flex: 1;
    height: 10px;
    background: var(--gris-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.test-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--celeste), var(--celeste-dark));
    border-radius: var(--radius-full);
    transition: width 0.4s ease;
}

.test-progress-text {
    font-size: 14px;
    font-weight: 700;
    color: var(--azul-oscuro);
    white-space: nowrap;
}

.pregunta-card {
    background: var(--blanco);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
    border: 1px solid var(--gris-100);
}

.pregunta-nivel {
    display: inline-block;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.pregunta-nivel.literal { background: #dbeafe; color: #1e40af; }
.pregunta-nivel.inferencial { background: #fef3c7; color: #92400e; }
.pregunta-nivel.critico { background: #fce7f3; color: #9d174d; }

.pregunta-texto {
    font-size: 17px;
    font-weight: 600;
    color: var(--azul-oscuro);
    margin-bottom: 18px;
    line-height: 1.5;
}

.alternativas {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.alternativa {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    border: 2px solid var(--gris-200);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    font-size: 15px;
}

.alternativa:hover {
    border-color: var(--celeste);
    background: rgba(0,180,216,0.05);
}

.alternativa.selected {
    border-color: var(--celeste);
    background: rgba(0,180,216,0.1);
}

.alternativa.correct {
    border-color: var(--verde);
    background: rgba(16,185,129,0.1);
}

.alternativa.incorrect {
    border-color: var(--rojo);
    background: rgba(239,68,68,0.1);
}

.alternativa-letter {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--gris-100);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
    color: var(--azul-medio);
}

.alternativa.selected .alternativa-letter {
    background: var(--celeste);
    color: var(--blanco);
}

/* ========================
   RESULTADOS
   ======================== */
.results-container {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.results-hero {
    background: linear-gradient(135deg, var(--azul-oscuro) 0%, var(--azul-claro) 100%);
    color: var(--blanco);
    border-radius: var(--radius-xl);
    padding: 40px;
    margin-bottom: 30px;
    position: relative;
    overflow: hidden;
}

.results-hero::before {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    background: rgba(0,180,216,0.15);
    border-radius: 50%;
    top: -50px;
    right: -50px;
}

.results-score {
    font-size: 72px;
    font-family: 'Fredoka', sans-serif;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 5px;
}

.results-label {
    font-size: 18px;
    color: var(--celeste-light);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-top: 25px;
}

.result-item {
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    padding: 15px;
}

.result-item-value {
    font-size: 24px;
    font-weight: 700;
}

.result-item-label {
    font-size: 12px;
    color: var(--celeste-light);
    margin-top: 3px;
}

/* Medalla ganada animación */
.medal-earned {
    animation: medalBounce 0.6s ease;
}

@keyframes medalBounce {
    0% { transform: scale(0); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}

/* ========================
   RESUMEN (Escribir)
   ======================== */
.resumen-container {
    max-width: 700px;
    margin: 0 auto;
}

.char-counter {
    text-align: right;
    font-size: 13px;
    color: var(--gris-500);
    margin-top: 8px;
}

.char-counter.near-limit { color: var(--naranja); }
.char-counter.at-limit { color: var(--rojo); font-weight: 700; }

/* ========================
   RANKING
   ======================== */
.ranking-list {
    list-style: none;
}

.ranking-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--gris-100);
    transition: var(--transition);
}

.ranking-item:hover {
    background: var(--gris-50);
}

.ranking-position {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Fredoka', sans-serif;
    font-weight: 700;
    font-size: 16px;
    flex-shrink: 0;
}

.ranking-position.top-1 {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: var(--blanco);
    font-size: 20px;
}

.ranking-position.top-2 {
    background: linear-gradient(135deg, #94a3b8, #64748b);
    color: var(--blanco);
}

.ranking-position.top-3 {
    background: linear-gradient(135deg, #d97706, #b45309);
    color: var(--blanco);
}

.ranking-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--celeste);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.ranking-info {
    flex: 1;
}

.ranking-name {
    font-weight: 700;
    font-size: 15px;
    color: var(--azul-oscuro);
}

.ranking-detail {
    font-size: 12px;
    color: var(--gris-500);
}

.ranking-points {
    font-family: 'Fredoka', sans-serif;
    font-weight: 700;
    font-size: 18px;
    color: var(--dorado);
}

/* ========================
   MEDALLAS GRID
   ======================== */
.medallas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 15px;
}

.medalla-card {
    text-align: center;
    padding: 20px 15px;
    border-radius: var(--radius-lg);
    border: 2px solid var(--gris-200);
    transition: var(--transition);
}

.medalla-card.earned {
    border-color: var(--dorado);
    background: linear-gradient(135deg, #fffbeb, #fef3c7);
}

.medalla-card.locked {
    opacity: 0.5;
    filter: grayscale(0.8);
}

.medalla-icon {
    font-size: 48px;
    margin-bottom: 10px;
}

.medalla-nombre {
    font-weight: 700;
    font-size: 14px;
    color: var(--azul-oscuro);
    margin-bottom: 4px;
}

.medalla-desc {
    font-size: 11px;
    color: var(--gris-500);
}

/* ========================
   TABLAS
   ======================== */
.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th {
    background: var(--gris-50);
    padding: 12px 16px;
    text-align: left;
    font-size: 13px;
    font-weight: 700;
    color: var(--gris-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--gris-200);
}

.table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--gris-100);
    font-size: 14px;
}

.table tr:hover {
    background: var(--gris-50);
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
}

.badge-success { background: #d1fae5; color: #065f46; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-info { background: #dbeafe; color: #1e40af; }
.badge-purple { background: #e9d5ff; color: #6b21a8; }

/* ========================
   MODALES
   ======================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10,22,40,0.7);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--blanco);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 550px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: var(--transition);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    padding: 22px 25px;
    border-bottom: 1px solid var(--gris-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--gris-500);
    padding: 5px;
}

.modal-body {
    padding: 25px;
}

.modal-footer {
    padding: 15px 25px;
    border-top: 1px solid var(--gris-100);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* ========================
   ALERTS
   ======================== */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    font-size: 14px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success { background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-error { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }
.alert-warning { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }
.alert-info { background: #dbeafe; color: #1e40af; border: 1px solid #bfdbfe; }

/* ========================
   EMPTY STATE
   ======================== */
.empty-state {
    text-align: center;
    padding: 50px 20px;
    color: var(--gris-500);
}

.empty-state-icon {
    font-size: 64px;
    margin-bottom: 15px;
}

.empty-state-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--azul-oscuro);
    margin-bottom: 8px;
}

/* ========================
   TABS
   ======================== */
.tabs {
    display: flex;
    gap: 5px;
    border-bottom: 2px solid var(--gris-200);
    margin-bottom: 25px;
    overflow-x: auto;
}

.tab {
    padding: 10px 20px;
    font-weight: 600;
    font-size: 14px;
    color: var(--gris-500);
    border-bottom: 3px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
    font-family: 'Nunito', sans-serif;
}

.tab:hover {
    color: var(--azul-oscuro);
}

.tab.active {
    color: var(--celeste-dark);
    border-bottom-color: var(--celeste);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ========================
   PADRE - Panel supervisión
   ======================== */
.supervision-card {
    background: linear-gradient(135deg, #ecfdf5, #d1fae5);
    border: 2px solid var(--verde);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 15px;
}

.visto-bueno-btn {
    background: linear-gradient(135deg, var(--verde), #059669);
    color: var(--blanco);
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-family: 'Fredoka', sans-serif;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.visto-bueno-btn:hover {
    transform: scale(1.05);
}

/* ========================
   RESPONSIVE
   ======================== */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .sidebar-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.5);
        z-index: 99;
        display: none;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
}

@media (max-width: 768px) {
    .content-area {
        padding: 15px;
    }
    
    .topbar {
        padding: 12px 15px;
    }
    
    .page-title {
        font-size: 18px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .stat-card {
        padding: 15px;
    }
    
    .stat-value {
        font-size: 22px;
    }
    
    .lecturas-grid {
        grid-template-columns: 1fr;
    }
    
    .reader-body {
        padding: 20px;
        font-size: 15px;
    }
    
    .pregunta-card {
        padding: 20px;
    }
    
    .results-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .results-score {
        font-size: 54px;
    }
    
    .login-container {
        padding: 30px 25px;
        margin: 15px;
    }
    
    .medallas-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .topbar-right .racha-display,
    .topbar-right .puntos-display {
        display: none;
    }
    
    .medallas-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
}

/* ========================
   ANIMATIONS
   ======================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes confetti {
    0% { transform: translateY(0) rotate(0deg); opacity: 1; }
    100% { transform: translateY(-100px) rotate(720deg); opacity: 0; }
}

.animate-fade { animation: fadeIn 0.5s ease; }
.animate-slide { animation: slideInRight 0.5s ease; }
.animate-pulse { animation: pulse 2s infinite; }

/* ========================
   SCROLLBAR CUSTOM
   ======================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gris-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gris-300);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gris-500);
}

/* ========================
   PRINT
   ======================== */
@media print {
    .sidebar, .topbar, .btn { display: none; }
    .main-content { margin: 0; }
    .content-area { padding: 0; }
}