:root {
    --primary-color: #1e40af;
    --secondary-color: #64748b;
    --success-color: #16a34a;
    --warning-color: #ea580c;
    --danger-color: #dc2626;
    --light-bg: #f8fafc;
    --border-color: #e2e8f0;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-dark);
    background-color: #f1f5f9;
    line-height: 1.6;
}

/* ========================================
   CONTENEDOR PRINCIPAL
   ======================================== */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

/* ========================================
   SECCIÓN DE REPORTES
   ======================================== */

.report-section {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.report-header {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--spacing-xl);
    padding: var(--spacing-2xl);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.year-display h1 {
    font-size: 2.5rem;
    font-weight: 600;
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

#currentYear {
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 700;
}

/* ========================================
   SELECTOR DE AÑO
   ======================================== */

.year-selector {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: right;
}

.year-selector label {
    font-weight: 600;
    font-size: 1rem;
}

.year-dropdown {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.95);
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

.year-dropdown:hover {
    background: white;
    border-color: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.year-dropdown:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.5);
}

/* ========================================
   TABLA DE REPORTES
   ======================================== */

.reports-table-wrapper {
    overflow-x: auto;
    padding: var(--spacing-xl);
}

.reports-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.reports-table thead {
    background: linear-gradient(135deg, #f8fafc 0%, #eef2f5 100%);
    position: sticky;
    top: 0;
    z-index: 10;
}

.reports-table thead tr {
    border-bottom: 2px solid var(--border-color);
}

.reports-table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--text-dark);
    white-space: nowrap;
}

.col-check {
    width: 5%;
    text-align: center;
}

.col-concept {
    width: 35%;
    min-width: 250px;
}

.col-trimester {
    width: 15%;
    text-align: center;
    min-width: 120px;
}

/* Filas de encabezado de sección */
.section-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.section-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
    padding: var(--spacing-md) 0;
}

.section-header td {
    padding: var(--spacing-lg);
}

/* Filas de reportes */
.report-row {
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s ease;
}

.report-row:hover {
    background-color: #f8fafc;
}

.report-row.checked {
    background-color: #eff6ff;
}

.report-row td {
    padding: var(--spacing-md);
    vertical-align: middle;
}

.cell-check {
    text-align: center;
}

.report-checkbox {
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.cell-concept {
    font-weight: 500;
    color: var(--text-dark);
}

.concept-text {
    display: block;
    line-height: 1.5;
}

.cell-trimester {
    text-align: center;
}

/* ========================================
   ENLACES DE DOCUMENTOS
   ======================================== */

.document-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    align-items: center;
}

.doc-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 1.1rem;
}

.doc-link.pdf {
    background: #fee2e2;
    color: var(--danger-color);
}

.doc-link.pdf:hover {
    background: var(--danger-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.doc-link.excel {
    background: #dcfce7;
    color: var(--success-color);
}

.doc-link.excel:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ========================================
   BOTONES DE ACCIÓN
   ======================================== */

.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    padding: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
    background: var(--light-bg);
    justify-content: center;
}

.btn {
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all 0.3s ease;
    white-space: nowrap;
}

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

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

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

.btn-primary:hover {
    background: #1e3a8a;
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background: #475569;
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-success:hover {
    background: #15803d;
}

.btn-success:disabled {
    background: #d1d5db;
    cursor: not-allowed;
    transform: none;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 1024px) {
    .report-header {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-lg);
    }

    .year-selector {
        text-align: center;
    }

    .col-concept {
        width: 30%;
        min-width: 200px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-lg);
    }

    .reports-table-wrapper {
        padding: var(--spacing-md);
    }

    .report-header {
        padding: var(--spacing-lg);
    }

    .year-display h1 {
        font-size: 1.75rem;
    }

    .reports-table {
        font-size: 0.85rem;
    }

    .reports-table th,
    .reports-table td {
        padding: var(--spacing-sm);
    }

    .col-check {
        width: 8%;
    }

    .col-concept {
        width: 25%;
        min-width: 150px;
    }

    .col-trimester {
        width: 17%;
        min-width: 100px;
        font-size: 0.8rem;
    }

    .doc-link {
        width: 2rem;
        height: 2rem;
        font-size: 0.9rem;
    }

    .action-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: var(--spacing-md);
    }

    .report-header {
        grid-template-columns: 1fr;
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .year-display h1 {
        font-size: 1.5rem;
    }

    .reports-table-wrapper {
        padding: var(--spacing-sm);
        overflow-x: auto;
    }

    .reports-table {
        font-size: 0.75rem;
        min-width: 600px;
    }

    .col-concept {
        min-width: 120px;
    }

    .section-header h3 {
        font-size: 0.9rem;
    }

    .concept-text {
        line-height: 1.3;
    }
}

/* ========================================
   UTILIDADES Y ANIMACIONES
   ======================================== */

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

.report-section {
    animation: slideIn 0.3s ease-out;
}

/* Scroll personalizado */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-bg);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}