/* =====================================================
   SISTEMA DE ADMISIÓN - CECyTE Uruapan
   Sistema de Diseño Premium
   ===================================================== */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Variables / Design Tokens ── */
:root {
    /* Paleta principal - Tonos institucionales CECyTE (Verde y Naranja) */
    --color-primary: #007936;
    --color-primary-light: #009945;
    --color-primary-dark: #005a28;
    --color-primary-rgb: 0, 121, 54;

    --color-accent: #f26522;
    --color-accent-light: #f58c56;
    --color-accent-dark: #d04d10;

    --color-secondary: #2d9cdb;
    --color-secondary-light: #63b3ed;

    --color-success: #38a169;
    --color-success-light: #c6f6d5;
    --color-warning: #d69e2e;
    --color-warning-light: #fefcbf;
    --color-danger: #e53e3e;
    --color-danger-light: #fed7d7;
    --color-info: #3182ce;
    --color-info-light: #bee3f8;

    /* Neutros */
    --color-bg: #f0f4f8;
    --color-surface: #ffffff;
    --color-surface-alt: #f7fafc;
    --color-border: #e2e8f0;
    --color-border-light: #edf2f7;

    --color-text: #1a202c;
    --color-text-secondary: #4a5568;
    --color-text-muted: #a0aec0;
    --color-text-inverse: #ffffff;

    /* Tipografía */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;

    /* Espaciado */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;

    /* Bordes */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Sombras */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 30px rgba(var(--color-primary-rgb), 0.15);

    /* Transiciones */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ── Reset ── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
}

a { color: var(--color-secondary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-primary-light); }

img { max-width: 100%; height: auto; display: block; }

/* ── Utilidades ── */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* =====================================================
   LOGIN PAGE
   ===================================================== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 40%, var(--color-primary-light) 100%);
}

/* Fondo animado con formas geométricas */
.login-page::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%);
    top: -200px;
    right: -150px;
    border-radius: 50%;
    animation: floatBg 15s ease-in-out infinite;
}

.login-page::after {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(229,62,62,0.08) 0%, transparent 70%);
    bottom: -200px;
    left: -100px;
    border-radius: 50%;
    animation: floatBg 18s ease-in-out infinite reverse;
}

@keyframes floatBg {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

.login-container {
    width: 100%;
    max-width: 440px;
    position: relative;
    z-index: 2;
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-2xl);
    padding: var(--space-10);
    box-shadow: var(--shadow-2xl), 0 0 80px rgba(0,0,0,0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.login-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.login-logo {
    width: 72px;
    height: 72px;
    margin: 0 auto var(--space-5);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(var(--color-primary-rgb), 0.3);
    animation: logoEntry 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards;
    opacity: 0;
    transform: scale(0.5);
}

@keyframes logoEntry {
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.login-logo svg {
    width: 36px;
    height: 36px;
    fill: white;
}

.login-header h1 {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: var(--space-2);
    letter-spacing: -0.02em;
}

.login-header p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    font-weight: 400;
}

.login-header .subtitle-institution {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

/* ── Form Groups ── */
.form-group {
    margin-bottom: var(--space-5);
    position: relative;
}

.form-group label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

.input-wrapper {
    position: relative;
}

.input-wrapper .input-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--color-text-muted);
    pointer-events: none;
    transition: color var(--transition-fast);
}

.form-input {
    width: 100%;
    padding: var(--space-3) var(--space-4) var(--space-3) calc(var(--space-4) + 18px + var(--space-3));
    font-family: var(--font-sans);
    font-size: var(--text-base);
    color: var(--color-text);
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    outline: none;
    transition: all var(--transition-base);
}

.form-input::placeholder {
    color: var(--color-text-muted);
    font-weight: 400;
}

.form-input:hover {
    border-color: var(--color-secondary-light);
}

.form-input:focus {
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(45, 156, 219, 0.15);
}

.form-input:focus ~ .input-icon,
.form-input:focus + .input-icon {
    color: var(--color-secondary);
}

/* Password toggle */
.password-toggle {
    position: absolute;
    right: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-muted);
    padding: var(--space-1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast);
}

.password-toggle:hover {
    color: var(--color-text-secondary);
}

.password-toggle svg {
    width: 18px;
    height: 18px;
}

/* ── Botones ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-sans);
    font-size: var(--text-base);
    font-weight: 600;
    line-height: 1.5;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    width: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-text-inverse);
    box-shadow: 0 4px 12px rgba(var(--color-primary-rgb), 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(var(--color-primary-rgb), 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::after {
    left: 100%;
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-secondary);
    border: 2px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(var(--color-primary-rgb), 0.03);
}

.btn-danger {
    background: linear-gradient(135deg, var(--color-danger) 0%, var(--color-accent-dark) 100%);
    color: var(--color-text-inverse);
    box-shadow: 0 4px 12px rgba(229, 62, 62, 0.3);
}

.btn-danger:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(229, 62, 62, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, var(--color-success) 0%, #2f855a 100%);
    color: var(--color-text-inverse);
    box-shadow: 0 4px 12px rgba(56, 161, 105, 0.3);
}

.btn-success:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(56, 161, 105, 0.4);
}

.btn-sm { padding: var(--space-2) var(--space-4); font-size: var(--text-sm); }
.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--text-lg); }

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Loading state */
.btn.loading {
    pointer-events: none;
    position: relative;
    color: transparent;
}

.btn.loading::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ── Alertas / Flash Messages ── */
.alert {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    margin-bottom: var(--space-5);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    animation: alertIn 0.3s ease-out;
    border-left: 4px solid;
}

@keyframes alertIn {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.alert-error {
    background: var(--color-danger-light);
    color: var(--color-accent-dark);
    border-color: var(--color-danger);
}

.alert-success {
    background: var(--color-success-light);
    color: #22543d;
    border-color: var(--color-success);
}

.alert-warning {
    background: var(--color-warning-light);
    color: #744210;
    border-color: var(--color-warning);
}

.alert-info {
    background: var(--color-info-light);
    color: #2a4365;
    border-color: var(--color-info);
}

.alert svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

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

/* ── Navbar ── */
.navbar {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0 var(--space-6);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: 700;
    font-size: var(--text-lg);
    color: var(--color-primary-dark);
    text-decoration: none;
}

.navbar-brand-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.navbar-brand-icon svg {
    width: 20px;
    height: 20px;
    fill: white;
}

.navbar-info {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.navbar-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: var(--text-sm);
}

.navbar-user-details {
    display: flex;
    flex-direction: column;
}

.navbar-user-name {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.2;
}

.navbar-user-role {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    text-transform: capitalize;
}

.navbar-logout {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
    font-weight: 500;
}

.navbar-logout:hover {
    color: var(--color-danger);
    border-color: var(--color-danger);
    background: var(--color-danger-light);
}

.navbar-logout svg {
    width: 16px;
    height: 16px;
}

/* ── Main Content ── */
.main-content {
    flex: 1;
    padding: var(--space-8) var(--space-6);
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

/* ── Page Header ── */
.page-header {
    margin-bottom: var(--space-8);
}

.page-header h1 {
    font-size: var(--text-3xl);
    font-weight: 800;
    color: var(--color-primary-dark);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-2);
}

.page-header p {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
}

/* ── Cards ── */
.card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h2,
.card-header h3 {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-text);
}

.card-body {
    padding: var(--space-6);
}

.card-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--color-border-light);
    background: var(--color-surface-alt);
}

/* ── Grid Layout ── */
.grid {
    display: grid;
    gap: var(--space-6);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ── Stat Cards ── */
.stat-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
}

.stat-icon.primary { background: rgba(var(--color-primary-rgb), 0.1); color: var(--color-primary); }
.stat-icon.success { background: rgba(56, 161, 105, 0.1); color: var(--color-success); }
.stat-icon.warning { background: rgba(214, 158, 46, 0.1); color: var(--color-warning); }
.stat-icon.danger { background: rgba(229, 62, 62, 0.1); color: var(--color-danger); }
.stat-icon.info { background: rgba(49, 130, 206, 0.1); color: var(--color-info); }

.stat-content h3 {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
    margin-bottom: var(--space-1);
}

.stat-value {
    font-size: var(--text-3xl);
    font-weight: 800;
    color: var(--color-text);
    line-height: 1;
}

/* ── Perfil / Datos del aspirante ── */
.profile-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4) var(--space-8);
}

.profile-field {
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.profile-field:last-child,
.profile-field:nth-last-child(2) {
    border-bottom: none;
}

.profile-label {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-1);
}

.profile-value {
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--color-text);
}

/* ── Badge / Etiquetas ── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge-success { background: var(--color-success-light); color: #22543d; }
.badge-warning { background: var(--color-warning-light); color: #744210; }
.badge-danger { background: var(--color-danger-light); color: var(--color-accent-dark); }
.badge-info { background: var(--color-info-light); color: #2a4365; }
.badge-primary {
    background: rgba(var(--color-primary-rgb), 0.1);
    color: var(--color-primary);
}

/* =====================================================
   EXAMEN
   ===================================================== */
.examen-progress {
    margin-bottom: var(--space-6);
}

.progress-bar-container {
    background: var(--color-border-light);
    border-radius: var(--radius-full);
    height: 8px;
    overflow: hidden;
    margin-top: var(--space-2);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-secondary) 0%, var(--color-success) 100%);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.progress-text {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    display: flex;
    justify-content: space-between;
}

.question-card {
    margin-bottom: var(--space-6);
    animation: fadeInUp 0.3s ease-out;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.question-number {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-2);
}

.question-category {
    display: inline-block;
    margin-left: var(--space-2);
    padding: var(--space-1) var(--space-2);
    background: rgba(var(--color-primary-rgb), 0.08);
    color: var(--color-primary);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
}

.question-text {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-5);
    line-height: 1.5;
}

.options-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.option-item {
    position: relative;
}

.option-input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.option-label {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.option-letter {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-surface-alt);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.option-label:hover {
    border-color: var(--color-secondary-light);
    background: rgba(45, 156, 219, 0.03);
}

.option-input:checked + .option-label {
    border-color: var(--color-secondary);
    background: rgba(45, 156, 219, 0.05);
}

.option-input:checked + .option-label .option-letter {
    background: var(--color-secondary);
    color: white;
}

/* ── Examen Navigation ── */
.examen-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border-light);
}

.question-dots {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    justify-content: center;
    margin: var(--space-4) 0;
}

.question-dot {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--color-border);
    background: var(--color-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.question-dot:hover {
    border-color: var(--color-secondary);
    color: var(--color-secondary);
}

.question-dot.answered {
    background: var(--color-secondary);
    border-color: var(--color-secondary);
    color: white;
}

.question-dot.current {
    border-color: var(--color-primary);
    color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15);
}

/* =====================================================
   ADMIN PANEL
   ===================================================== */
.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
}

.admin-table thead {
    background: var(--color-surface-alt);
}

.admin-table th {
    padding: var(--space-3) var(--space-4);
    text-align: left;
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--color-border);
}

.admin-table td {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text);
    vertical-align: middle;
}

.admin-table tbody tr {
    transition: background var(--transition-fast);
}

.admin-table tbody tr:hover {
    background: var(--color-surface-alt);
}

.admin-table .ficha-cell {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--color-primary);
}

/* ── Formulario Admin (fechas, etc.) ── */
.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

.form-input-admin {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    color: var(--color-text);
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    outline: none;
    transition: all var(--transition-base);
}

.form-input-admin:focus {
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(45, 156, 219, 0.15);
}

/* ── Empty State ── */
.empty-state {
    text-align: center;
    padding: var(--space-16) var(--space-6);
    color: var(--color-text-muted);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    opacity: 0.4;
}

.empty-state h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

.empty-state p {
    font-size: var(--text-sm);
}

/* =====================================================
   FOOTER
   ===================================================== */
.footer {
    text-align: center;
    padding: var(--space-6);
    color: var(--color-text-muted);
    font-size: var(--text-xs);
    border-top: 1px solid var(--color-border-light);
}

.login-footer {
    text-align: center;
    margin-top: var(--space-6);
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--text-xs);
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 768px) {
    .login-card {
        padding: var(--space-6);
    }

    .navbar {
        padding: 0 var(--space-4);
    }

    .navbar-user-details {
        display: none;
    }

    .main-content {
        padding: var(--space-6) var(--space-4);
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .profile-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .page-header h1 {
        font-size: var(--text-2xl);
    }

    .admin-table {
        display: block;
        overflow-x: auto;
    }

    .examen-nav {
        flex-direction: column;
        gap: var(--space-3);
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: var(--space-5);
    }

    .login-logo {
        width: 56px;
        height: 56px;
    }

    .login-header h1 {
        font-size: var(--text-xl);
    }

    .stat-card {
        padding: var(--space-4);
    }

    .stat-value {
        font-size: var(--text-2xl);
    }
}

/* ── TIMER WIDGET ── */
.exam-timer {
    position: sticky;
    top: 0;
    z-index: 100;
    background: linear-gradient(135deg, rgba(255,255,255,0.97) 0%, rgba(240,244,248,0.97) 100%);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4) var(--space-5);
    margin-bottom: var(--space-6);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08), 0 1px 4px rgba(0, 0, 0, 0.04);
    transition: all 0.4s ease;
}

.exam-timer-inner {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-6);
    margin-bottom: var(--space-3);
}

.timer-section {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.timer-icon {
    font-size: 1.5rem;
    line-height: 1;
}

.timer-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.timer-label {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.timer-value {
    font-size: var(--text-xl);
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-text);
    letter-spacing: 0.02em;
    line-height: 1.2;
}

.timer-divider {
    width: 1px;
    height: 40px;
    background: var(--color-border);
}

.timer-section-remaining .timer-value {
    color: var(--color-primary);
}

/* Timer progress bar */
.timer-bar-container {
    width: 100%;
    height: 6px;
    background: var(--color-border-light);
    border-radius: 3px;
    overflow: hidden;
}

.timer-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    border-radius: 3px;
    transition: width 1s linear;
}

/* Warning state: < 10 min */
.exam-timer.timer-warning {
    border-color: var(--color-warning);
    box-shadow: 0 4px 20px rgba(214, 158, 46, 0.15), 0 0 0 1px rgba(214, 158, 46, 0.2);
}

.exam-timer.timer-warning .timer-section-remaining .timer-value {
    color: var(--color-warning);
}

.exam-timer.timer-warning .timer-bar {
    background: linear-gradient(90deg, var(--color-warning), #ecc94b);
}

/* Danger state: < 5 min */
.exam-timer.timer-danger {
    border-color: var(--color-danger);
    box-shadow: 0 4px 20px rgba(229, 62, 62, 0.2), 0 0 0 1px rgba(229, 62, 62, 0.3);
    animation: timerPulse 1.5s ease-in-out infinite;
}

.exam-timer.timer-danger .timer-section-remaining .timer-value {
    color: var(--color-danger);
    animation: timerBlink 1s ease-in-out infinite;
}

.exam-timer.timer-danger .timer-bar {
    background: linear-gradient(90deg, var(--color-danger), #fc8181);
}

@keyframes timerPulse {
    0%, 100% { box-shadow: 0 4px 20px rgba(229, 62, 62, 0.2), 0 0 0 1px rgba(229, 62, 62, 0.3); }
    50% { box-shadow: 0 4px 30px rgba(229, 62, 62, 0.35), 0 0 0 2px rgba(229, 62, 62, 0.4); }
}

@keyframes timerBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* Timer Modal (time expired) */
.timer-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.timer-modal {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-8) var(--space-10);
    text-align: center;
    max-width: 440px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalSlideUp 0.4s ease;
}

.timer-modal-icon {
    font-size: 3.5rem;
    margin-bottom: var(--space-4);
    animation: shake 0.6s ease-in-out;
}

.timer-modal h2 {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-danger);
    margin-bottom: var(--space-3);
}

.timer-modal p {
    color: var(--color-text-secondary);
    font-size: var(--text-base);
    line-height: 1.6;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes modalSlideUp {
    from { opacity: 0; transform: translateY(30px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

/* Badge secondary for "Pendiente" status */
.badge-secondary {
    background-color: var(--color-text-muted);
    color: var(--color-text-inverse);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
}

/* Responsive timer */
@media (max-width: 640px) {
    .exam-timer {
        padding: var(--space-3) var(--space-4);
    }

    .exam-timer-inner {
        gap: var(--space-3);
    }

    .timer-value {
        font-size: var(--text-lg);
    }

    .timer-icon {
        font-size: 1.2rem;
    }

    .timer-divider {
        height: 30px;
    }

    .timer-modal {
        padding: var(--space-6);
    }
}