/* BASE GENERAL – Estilo Premium Mejor Llame a Roberto 
 * Versión mejorada con responsive design y optimizaciones
 */

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --success: #16a34a;
    --success-light: #dcfce7;
    --warning: #92400e;
    --warning-bg: #fffbeb;
    --danger: #991b1b;
    --danger-bg: #fef2f2;
    --info: #1d4ed8;
    --info-bg: #eff6ff;
    --bg: #f4f6f8;
    --text: #111827;
    --muted: #6b7280;
    --border-subtle: #e5e7eb;
    --radius: 10px;
    --transition-speed: 0.18s;
}

/* Reset mínimo */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 16px;
}

/* HEADER CORPORATIVO */
header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    background: var(--primary);
    color: #fff;
    border-bottom: none;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.15);
}

header img {
    height: 56px;
    width: auto;
    flex-shrink: 0;
}

header h1 {
    margin: 0;
    font-size: 22px;
    font-weight: 700;
    color: #fff;
}

header p {
    margin: 0;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.85);
}

/* Responsive header */
@media (max-width: 640px) {
    header {
        padding: 12px 16px;
        gap: 12px;
    }
    
    header img {
        height: 44px;
    }
    
    header h1 {
        font-size: 18px;
    }
    
    header p {
        font-size: 13px;
    }
}

/* Contenedor principal */
main {
    padding-top: 16px;
}

/* Tarjetas genéricas */
.card {
    background-color: #fff;
    border-radius: var(--radius);
    padding: 20px 24px;
    box-shadow: 0 2px 6px rgba(15, 23, 42, 0.06);
    border: 1px solid rgba(148, 163, 184, 0.25);
    transition: box-shadow var(--transition-speed);
}

.card:hover {
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
}

.card h2 {
    margin-top: 0;
    margin-bottom: 16px;
    font-size: 20px;
    font-weight: 600;
    color: var(--text);
}

.card h3 {
    margin-top: 20px;
    margin-bottom: 12px;
    font-size: 18px;
    font-weight: 600;
}

.card h4 {
    margin-top: 16px;
    margin-bottom: 10px;
    font-size: 16px;
    font-weight: 600;
    color: #374151;
}

/* Responsive cards */
@media (max-width: 640px) {
    .card {
        padding: 16px 18px;
    }
    
    .card h2 {
        font-size: 18px;
    }
    
    .card h3 {
        font-size: 16px;
    }
    
    .card h4 {
        font-size: 15px;
    }
}

/* Callouts */
.callout {
    border-radius: 8px;
    padding: 14px 16px;
    margin: 16px 0;
    font-size: 14px;
    line-height: 1.6;
}

.callout h4 {
    margin-top: 0;
    margin-bottom: 6px;
    font-size: 15px;
    font-weight: 600;
}

.callout p:last-child,
.callout ul:last-child {
    margin-bottom: 0;
}

.callout-warning {
    border-left: 4px solid var(--warning);
    background-color: var(--warning-bg);
    color: #5b3411;
}

.callout-danger {
    border-left: 4px solid var(--danger);
    background-color: var(--danger-bg);
    color: #7f1d1d;
}

.callout-info {
    border-left: 4px solid var(--info);
    background-color: var(--info-bg);
    color: #1e3a8a;
}

.callout-success {
    border-left: 4px solid var(--success);
    background-color: var(--success-light);
    color: #14532d;
}

/* Badges / etiquetas pequeñas */
.badge {
    display: inline-block;
    border-radius: 999px;
    padding: 3px 10px;
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: .03em;
    background-color: var(--info-bg);
    color: var(--info);
}

.badge-success {
    background-color: var(--success-light);
    color: var(--success);
}

.badge-warning {
    background-color: var(--warning-bg);
    color: var(--warning);
}

/* Listas más legibles */
ul, ol {
    margin: 12px 0;
    line-height: 1.7;
}

ul {
    padding-left: 24px;
}

ol {
    padding-left: 26px;
}

li {
    margin: 6px 0;
}

/* Listas anidadas */
ul ul, ol ol, ul ol, ol ul {
    margin-top: 6px;
    margin-bottom: 6px;
}

/* Pre y code */
pre {
    background-color: #1e293b;
    color: #e2e8f0;
    padding: 12px 16px;
    border-radius: 6px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
    line-height: 1.5;
    margin: 12px 0;
}

code {
    background-color: #f1f5f9;
    color: #dc2626;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 13px;
}

pre code {
    background-color: transparent;
    color: inherit;
    padding: 0;
}

/* Tablas */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
}

th, td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-subtle);
}

th {
    background-color: var(--bg);
    font-weight: 600;
    color: var(--text);
}

tr:hover {
    background-color: rgba(37, 99, 235, 0.02);
}

/* Responsive tables */
@media (max-width: 640px) {
    table {
        font-size: 14px;
    }
    
    th, td {
        padding: 8px 10px;
    }
}

/* Enlaces */
a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-speed);
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

a:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 2px;
}

/* Imágenes responsive */
img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
}

/* Footer genérico */
footer {
    margin-top: 40px;
    text-align: center;
    color: var(--muted);
    font-size: 13px;
    padding-bottom: 20px;
    padding-left: 16px;
    padding-right: 16px;
}

footer p {
    margin: 6px 0;
}

/* Botón flotante de WhatsApp */
.whatsapp-float {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background-color: #25d366;
    color: #fff;
    border-radius: 50%;
    font-size: 32px;
    width: 60px;
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 6px 28px rgba(37, 211, 102, 0.4);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 9999;
    text-decoration: none;
}

.whatsapp-float:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 8px 32px rgba(37, 211, 102, 0.5);
}

.whatsapp-float:active {
    transform: scale(1.05);
}

/* Responsive WhatsApp button */
@media (max-width: 640px) {
    .whatsapp-float {
        width: 56px;
        height: 56px;
        font-size: 28px;
        bottom: 20px;
        right: 20px;
    }
}

/* Utilidades de espaciado */
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }

/* Utilidades de texto */
.text-center { text-align: center; }
.text-muted { color: var(--muted); }
.text-small { font-size: 14px; }
.font-bold { font-weight: 600; }

/* Separador visual */
hr {
    border: none;
    border-top: 1px solid var(--border-subtle);
    margin: 24px 0;
}

/* Scroll suave */
html {
    scroll-behavior: smooth;
}

/* Focus visible mejorado para accesibilidad */
*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Modo impresión */
@media print {
    body {
        background-color: #fff;
    }
    
    .whatsapp-float {
        display: none;
    }
    
    header {
        background: #fff;
        color: #000;
        border-bottom: 2px solid var(--border-subtle);
    }
    
    header h1,
    header p {
        color: #000;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--border-subtle);
        page-break-inside: avoid;
    }
    
    a {
        text-decoration: underline;
    }
    
    a[href]:after {
        content: " (" attr(href) ")";
        font-size: 11px;
        color: var(--muted);
    }
}

/* Dark mode (preparado para futura implementación) */
@media (prefers-color-scheme: dark) {
    /* Descomentar cuando se implemente dark mode
    :root {
        --bg: #0f172a;
        --text: #f1f5f9;
        --border-subtle: #334155;
    }
    
    body {
        background-color: var(--bg);
        color: var(--text);
    }
    
    .card {
        background-color: #1e293b;
    }
    */
}

/* Animación de carga (opcional) */
@keyframes fadeInPage {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

body {
    animation: fadeInPage 0.3s ease;
}

/* Selección de texto personalizada */
::selection {
    background-color: rgba(37, 99, 235, 0.2);
    color: var(--text);
}

::-moz-selection {
    background-color: rgba(37, 99, 235, 0.2);
    color: var(--text);
}