/* ==========================================================================
   Estudio Contable Ortiz-Rivera - Hoja de Estilos Principal (style.css)
   Diseño Responsive, Accesible y Optimizado para SEO
   ========================================================================== */

/* --- Variables CSS --- */
:root {
    --primary-navy: #0A4F78;
    --dark-navy: #06324D;
    --light-navy: #13679A;
    --gold-accent: #C59B27;
    --gold-hover: #D97706;
    --whatsapp-green: #059669;
    --whatsapp-hover: #047857;
    
    --bg-light: #F8FAFC;
    --bg-white: #FFFFFF;
    --bg-dark: #0B131F;
    --surface-card: #FFFFFF;
    
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #64748B;
    --text-light: #F8FAFC;
    
    --border-color: #E2E8F0;
    --border-focus: #0A4F78;
    
    --font-serif: 'Cinzel', serif;
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
}

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

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-light);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

/* --- Accesibilidad: Enlace de Salto --- */
.skip-link {
    position: absolute;
    top: -100px;
    left: 1rem;
    background: var(--gold-accent);
    color: #000;
    padding: 0.75rem 1.25rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    z-index: 9999;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 1rem;
}

:focus-visible {
    outline: 3px solid var(--gold-accent);
    outline-offset: 2px;
}

/* --- Top Bar --- */
.top-bar {
    background-color: var(--bg-dark);
    color: #CBD5E1;
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    border-bottom: 1px solid #1E293B;
}

.top-bar-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
}

.top-bar-info, .top-bar-phones {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.top-bar-info i, .top-bar-phones i {
    color: var(--gold-accent);
}

.top-bar a:hover {
    color: var(--gold-accent);
}

/* --- Header & Navegación --- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brand-logo img {
    height: 52px;
    width: 52px;
    border-radius: var(--radius-full);
    object-fit: cover;
    box-shadow: var(--shadow-sm);
}

.brand-title {
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--dark-navy);
    letter-spacing: 0.05em;
    line-height: 1.1;
}

.brand-subtitle {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gold-accent);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

/* Menú de Navegación */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-secondary);
    padding: 0.5rem 0;
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-navy);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--gold-accent);
    border-radius: var(--radius-full);
}

/* Botón Hamburguesa Móvil */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark-navy);
    cursor: pointer;
    padding: 0.5rem;
}

/* --- Componentes del Botón --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-weight: 700;
    font-size: 0.95rem;
    border-radius: var(--radius-lg);
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-normal);
}

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

.btn-primary:hover {
    background-color: var(--dark-navy);
    box-shadow: var(--shadow-md);
}

.btn-gold {
    background-color: var(--gold-accent);
    color: #000;
}

.btn-gold:hover {
    background-color: var(--gold-hover);
    color: #000;
    box-shadow: var(--shadow-md);
}

.btn-whatsapp {
    background-color: var(--whatsapp-green);
    color: var(--bg-white);
}

.btn-whatsapp:hover {
    background-color: var(--whatsapp-hover);
    color: var(--bg-white);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    border-color: var(--border-color);
    background-color: transparent;
    color: var(--text-primary);
}

.btn-outline:hover {
    background-color: var(--border-color);
}

/* --- Hero Section --- */
.hero-section {
    background: linear-gradient(135deg, #06324D 0%, #0A4F78 60%, #0F2537 100%);
    color: var(--text-light);
    padding: 5rem 1rem;
    position: relative;
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
}

@media (min-width: 992px) {
    .hero-container {
        grid-template-columns: 1.2fr 0.8fr;
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(5px);
    padding: 0.4rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gold-accent);
    border: 1px solid rgba(255, 255, 255, 0.15);
    margin-bottom: 1rem;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.25rem;
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 3.25rem;
    }
}

.hero-description {
    font-size: 1.125rem;
    color: #E2E8F0;
    margin-bottom: 2rem;
    max-width: 650px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.hero-logo-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-logo-card {
    width: 260px;
    height: 260px;
    border-radius: var(--radius-full);
    padding: 8px;
    background: linear-gradient(135deg, var(--gold-accent), var(--primary-navy));
    box-shadow: var(--shadow-xl);
}

.hero-logo-card img {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-full);
    object-fit: cover;
}

/* --- Breadcrumbs / Encabezado Interno --- */
.page-header {
    background: linear-gradient(135deg, var(--dark-navy) 0%, var(--primary-navy) 100%);
    color: var(--text-light);
    padding: 3.5rem 1rem;
    text-align: center;
}

.page-header h1 {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.breadcrumbs {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: #CBD5E1;
}

.breadcrumbs a:hover {
    color: var(--gold-accent);
}

/* --- Contenedor Global y Secciones --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section-padding {
    padding: 4.5rem 0;
}

.section-title-wrapper {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3.5rem auto;
}

.section-tag {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--primary-navy);
    margin-bottom: 0.5rem;
    display: block;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 2.25rem;
    color: var(--dark-navy);
    font-weight: 700;
    line-height: 1.25;
}

.section-description {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-top: 0.75rem;
}

/* --- Grillas y Cards --- */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .grid-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

.card {
    background-color: var(--surface-card);
    border-radius: var(--radius-xl);
    padding: 2rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 56px;
    height: 56px;
    background-color: rgba(10, 79, 120, 0.08);
    color: var(--primary-navy);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
}

.card-title {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    color: var(--dark-navy);
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.card-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.25rem;
}

.card-list {
    list-style: none;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.card-list li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.card-list li i {
    color: var(--whatsapp-green);
}

/* --- Sucursales / Tarjetas de Ubicación --- */
.branch-card {
    background-color: var(--bg-white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.branch-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background-color: rgba(10, 79, 120, 0.1);
    color: var(--primary-navy);
    font-weight: 700;
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
}

.branch-name {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--dark-navy);
    font-weight: 700;
    margin: 0.5rem 0 0.25rem 0;
}

.branch-detail {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.4rem;
}

.branch-detail i {
    color: var(--gold-accent);
}

/* --- Formulario de Contacto --- */
.contact-form {
    background-color: var(--bg-white);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 0.85rem 1rem;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-light);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-navy);
    background-color: var(--bg-white);
    box-shadow: 0 0 0 3px rgba(10, 79, 120, 0.15);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

/* --- Footer --- */
.site-footer {
    background-color: var(--bg-dark);
    color: #94A3B8;
    padding: 4rem 0 2rem 0;
    border-top: 1px solid #1E293B;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    margin-bottom: 3rem;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 1.5fr 1fr 1fr;
    }
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.footer-brand img {
    height: 64px;
    width: 64px;
    border-radius: var(--radius-full);
    border: 2.5px solid var(--gold-accent);
    box-shadow: 0 0 16px rgba(197, 155, 39, 0.4);
    background-color: var(--primary-navy);
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.footer-brand img:hover {
    transform: scale(1.08);
}

.footer-brand span {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--bg-white);
    font-weight: 700;
    letter-spacing: 0.05em;
}

.footer-title {
    color: var(--bg-white);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}

.footer-links {
    list-style: none;
    font-size: 0.9rem;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a:hover {
    color: var(--gold-accent);
}

.footer-bottom {
    border-top: 1px solid #1E293B;
    padding-top: 2rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    font-size: 0.85rem;
}

/* Responsive Menu Dropdown */
@media (max-width: 767px) {
    .mobile-toggle {
        display: block;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-white);
        flex-direction: column;
        align-items: flex-start;
        padding: 1.5rem;
        gap: 1.25rem;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        display: none;
    }
    
    .nav-menu.show {
        display: flex;
    }
}