/**
 * AL Asesorías - CSS Versión Básica
 * Diseño simple y funcional
 */

/* ========================================
   VARIABLES BÁSICAS
======================================== */
:root {
    --color-primary: #5a67d8;
    --color-text: #1f2937;
    --color-gray: #6b7280;
    --color-border: #d1d5db;
    --color-bg: #f9fafb;
}

/* ========================================
   RESET BÁSICO
======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

.row {
    display: flex;
    flex-wrap: wrap;
    margin: -8px;
}

.col-3 { flex: 0 0 25%; padding: 8px; }
.col-4 { flex: 0 0 33.333%; padding: 8px; }
.col-6 { flex: 0 0 50%; padding: 8px; }
.col-8 { flex: 0 0 66.666%; padding: 8px; }
.col-12 { flex: 0 0 100%; padding: 8px; }

/* ========================================
   CARDS SIMPLES
======================================== */
.card {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    margin-bottom: 20px;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg);
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
}

/* ========================================
   FORMULARIOS BÁSICOS
======================================== */
.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 14px;
    color: var(--color-text);
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
}

select.form-control {
    background: white;
    cursor: pointer;
}

textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

/* ========================================
   BOTONES SIMPLES
======================================== */
.btn {
    display: inline-block;
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    font-family: inherit;
}

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

.btn-primary:hover {
    background: #4c51bf;
}

.btn-light {
    background: white;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-light:hover {
    background: var(--color-bg);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

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

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

.table thead th {
    background: var(--color-bg);
    padding: 12px;
    text-align: left;
    font-size: 13px;
    font-weight: 600;
    border-bottom: 2px solid var(--color-border);
}

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

.table tbody tr:hover {
    background: var(--color-bg);
}

/* ========================================
   BADGES SIMPLES
======================================== */
.badge {
    display: inline-block;
    padding: 4px 8px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 3px;
}

.badge-primary {
    background: #dbeafe;
    color: #1e40af;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-secondary {
    background: #e5e7eb;
    color: #374151;
}

/* ========================================
   ALERTAS SIMPLES
======================================== */
.alert {
    padding: 12px 16px;
    border-radius: 4px;
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert-success {
    background: #d1fae5;
    border-color: #10b981;
    color: #065f46;
}

.alert-danger {
    background: #fee2e2;
    border-color: #ef4444;
    color: #991b1b;
}

.alert-info {
    background: #dbeafe;
    border-color: #3b82f6;
    color: #1e40af;
}

/* ========================================
   PAGE HEADER
======================================== */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--color-border);
}

/* ========================================
   UTILIDADES
======================================== */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }

/* ========================================
   RESPONSIVE BÁSICO
======================================== */
@media (max-width: 768px) {
    .col-3, .col-4, .col-6, .col-8 {
        flex: 0 0 100%;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
}