/* Reset y Variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #2952CC;
    --color-primary-dark: #1a3a8a;
    --color-primary-light: #4a6edb;
    --color-secondary: #f8f9fa;
    --color-text: #212529;
    --color-text-light: #6c757d;
    --color-border: #dee2e6;
    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-danger: #dc3545;
    --color-white: #ffffff;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--color-text);
    background-color: var(--color-secondary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: 1.5rem 0;
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo i {
    font-size: 2.5rem;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.logo p {
    font-size: 0.875rem;
    opacity: 0.9;
}

.admin-btn {
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--color-white);
    border: 2px solid var(--color-white);
    padding: 0.625rem 1.25rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
}

.admin-btn:hover {
    background-color: var(--color-white);
    color: var(--color-primary);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    color: var(--color-white);
    padding: 3rem 0;
    text-align: center;
}

.hero h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.hero p {
    font-size: 1.25rem;
    opacity: 0.95;
}

/* Main Navigation Cards */
.main-nav {
    padding: 3rem 0;
}

.nav-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.nav-card {
    background: var(--color-white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.nav-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.card-icon i {
    font-size: 2rem;
    color: var(--color-white);
}

.nav-card h3 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.nav-card p {
    color: var(--color-text-light);
    font-size: 1rem;
}

/* Content Sections */
.content-section {
    padding: 2rem 0 4rem;
    min-height: 70vh;
}

.section-header {
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.section-header h2 {
    color: var(--color-primary);
    font-size: 2rem;
    font-weight: 700;
}

.back-btn {
    background-color: var(--color-white);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    padding: 0.625rem 1.25rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
}

.back-btn:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* Instructivo */
.instructivo-content {
    max-width: 900px;
    margin: 0 auto;
}

.step-card {
    background: var(--color-white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
    display: flex;
    gap: 1.5rem;
    align-items: start;
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h3 {
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.step-content p {
    color: var(--color-text);
    line-height: 1.7;
}

.info-box {
    background: #e7f3ff;
    border-left: 4px solid var(--color-primary);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-top: 2rem;
}

.info-box.warning {
    background: #fff3cd;
    border-left-color: var(--color-warning);
}

.info-box h3 {
    color: var(--color-primary);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.info-box.warning h3 {
    color: #856404;
}

.info-box ul {
    list-style: none;
    padding-left: 0;
}

.info-box ul li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.info-box ul li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: 700;
}

/* Selector */
.selector-container {
    background: var(--color-white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
}

.selector-container label {
    display: block;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.selector-container select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 1rem;
    color: var(--color-text);
    background-color: var(--color-white);
    cursor: pointer;
    transition: var(--transition);
}

.selector-container select:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* Cronograma */
.cronograma-content {
    background: var(--color-white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.carrera-title {
    color: var(--color-primary);
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 3px solid var(--color-primary);
}

/* ESTILOS PARA CRONOGRAMA DE DRIVE */
.cronograma-drive-card {
    background: linear-gradient(135deg, #4a6edb 0%, #2952CC 100%);
    color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cronograma-drive-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(41, 82, 204, 0.3);
}

.cronograma-drive-card .drive-icon {
    font-size: 3rem;
    opacity: 0.9;
    min-width: 60px;
    text-align: center;
}

.cronograma-drive-card .drive-content {
    flex: 1;
}

.cronograma-drive-card h4 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: white;
}

.cronograma-drive-card p {
    margin-bottom: 1.5rem;
    opacity: 0.95;
    font-size: 1rem;
}

.cronograma-drive-card .btn-primary {
    background: white;
    color: var(--color-primary);
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 6px;
    display: inline-block;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.cronograma-drive-card .btn-primary:hover {
    background: #f8f9fa;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.cronograma-drive-card .btn-primary i {
    margin-right: 0.5rem;
}

.cronograma-table {
    width: 100%;
    border-collapse: collapse;
    overflow-x: auto;
    display: block;
}

.cronograma-table table {
    width: 100%;
    min-width: 600px;
}

.cronograma-table th {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    white-space: nowrap;
}

.cronograma-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.cronograma-table tbody tr:hover {
    background-color: #f1f5ff;
}

.cronograma-table tbody tr:last-child td {
    border-bottom: none;
}

/* Formulario */
.formulario-content {
    background: var(--color-white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.formulario-card {
    text-align: center;
    padding: 2rem;
}

.formulario-card h3 {
    color: var(--color-primary);
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.formulario-card p {
    color: var(--color-text-light);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    border: none;
    padding: 1rem 2.5rem;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary i {
    margin-right: 0.5rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--color-text-light);
}

.empty-state i {
    font-size: 4rem;
    opacity: 0.3;
    margin-bottom: 1rem;
}

.empty-state p {
    font-size: 1.1rem;
}

/* Footer */
.footer {
    background: var(--color-primary-dark);
    color: var(--color-white);
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
}

.footer p {
    opacity: 0.9;
    margin: 0.25rem 0;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h2 {
        font-size: 1.75rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .nav-cards {
        grid-template-columns: 1fr;
    }

    .section-header h2 {
        font-size: 1.5rem;
    }

    .step-card {
        flex-direction: column;
        text-align: center;
    }

    .step-number {
        margin: 0 auto;
    }

    .cronograma-table {
        font-size: 0.875rem;
    }

    .header-content {
        justify-content: center;
        text-align: center;
    }

    .logo {
        flex-direction: column;
        text-align: center;
    }
    
    .cronograma-drive-card {
        flex-direction: column;
        text-align: center;
        padding: 1.5rem;
    }
    
    .cronograma-drive-card .drive-icon {
        font-size: 2.5rem;
    }
    
    .cronograma-drive-card h4 {
        font-size: 1.25rem;
    }
    
    .cronograma-drive-card .btn-primary {
        width: 100%;
        text-align: center;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: var(--color-white);
    animation: spin 1s ease-in-out infinite;
}

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

/* Call to action link style */
.cta-link {
    display: inline-block;
    background-color: var(--color-primary-light);
    color: var(--color-white);
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    transition: background-color 0.3s ease;
}

.cta-link:hover {
    background-color: var(--color-primary);
    transform: scale(1.05);
}