/* ==========================================================================
   SurSystems - Estilos Principales
   ========================================================================== */

:root {
    /* Paleta de Colores Azul Corporativa */
    --color-primary-dark: #0D47A1;    /* Azul muy oscuro */
    --color-primary: #1976D2;         /* Azul medio */
    --color-primary-light: #42A5F5;   /* Azul claro */
    --color-primary-ultralight: #E3F2FD; /* Fondo azul clarísimo */
    
    /* Neutrales */
    --color-text: #111111; /* Actualizado para WCAG */
    --color-text-light: #333333; /* Actualizado para WCAG */
    --color-white: #ffffff;
    --color-bg: #FAFAFA;
    --color-border: #E0E0E0;
    
    /* Tipografía */
    --font-heading: 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Espaciado y Utilidades */
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 20px rgba(13, 71, 161, 0.1);
    --shadow-lg: 0 15px 35px rgba(13, 71, 161, 0.15);
    --radius: 12px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-primary-dark);
    line-height: 1.2;
    margin-bottom: 0.5em;
}

p {
    margin-bottom: 1em;
    color: var(--color-text-light);
}

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

img, svg {
    max-width: 100%;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.container-narrow {
    max-width: 900px;
}

.text-center { text-align: center; }
.text-white { color: var(--color-white) !important; }
.text-light { color: rgba(255,255,255,0.8) !important; }

/* Utilidades de fondo */
.bg-light { background-color: var(--color-bg); }
.bg-gradient-blue { background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%); }

.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
}

.section-desc {
    font-size: 1.125rem;
    max-width: 700px;
    margin: 0 auto;
}

/* ==========================================================================
   Botones
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 8px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: linear-gradient(90deg, var(--color-primary-dark), var(--color-primary));
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    color: var(--color-white);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255,255,255,0.5);
}

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

.pricing-card .btn-outline {
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.pricing-card .btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.125rem;
}

.btn-block {
    display: block;
    width: 100%;
}

/* ==========================================================================
   Header & Navegación
   ========================================================================== */
#main-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo a {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary-dark);
}

.logo .dot {
    color: var(--color-primary-light);
}

#main-nav {
    display: flex;
    gap: 30px;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-primary-dark);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #F8FAFC 0%, #EFF6FF 100%); /* Premium Light Mode */
    color: var(--color-text);
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero-bg-shapes {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: 1;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
}

.shape-1 {
    width: 400px; height: 400px;
    background: rgba(66, 165, 245, 0.6);
    top: -100px; right: -100px;
}

.shape-2 {
    width: 500px; height: 500px;
    background: rgba(13, 71, 161, 0.5);
    bottom: -200px; left: -100px;
}

.hero-container {
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    opacity: 0; /* GSAP reveals this */
}

.hero-badge {
    display: inline-block;
    background: rgba(13, 71, 161, 0.08);
    color: var(--color-primary-dark);
    border: 1px solid rgba(13, 71, 161, 0.15);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 25px;
}

.hero-title {
    font-size: 3.5rem;
    color: var(--color-text);
    letter-spacing: -1px;
}

.hero-title span {
    color: var(--color-primary);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-light);
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* ==========================================================================
   Sección Servicios (Cards)
   ========================================================================== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--color-white);
    border-radius: var(--radius);
    padding: 40px 30px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-primary-ultralight);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 0;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-primary-light));
    transition: var(--transition);
    z-index: -1;
    opacity: 0.05;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.service-card:hover::before {
    height: 100%;
}

.card-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 20px;
    color: var(--color-primary);
}

.service-card:hover .card-icon {
    transform: scale(1.1);
    transition: var(--transition);
}

/* ==========================================================================
   Planes (Pricing)
   ========================================================================== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    align-items: center;
}

.pricing-card {
    background: var(--color-white);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.pricing-card:hover {
    box-shadow: var(--shadow-lg);
}

.pricing-card.popular {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    position: relative;
    transform: scale(1.05);
}

.popular-badge {
    position: absolute;
    top: -15px; left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: var(--color-white);
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
}

.pricing-header h3 {
    font-size: 1.5rem;
    color: var(--color-text);
}

.price {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-primary-dark);
    margin: 15px 0;
    font-family: var(--font-heading);
}

.price span:first-child {
    font-size: 1.5rem;
    vertical-align: top;
    line-height: 2;
}

.period {
    font-size: 1rem;
    color: var(--color-text-light);
    font-weight: 500;
}

.pricing-features {
    list-style: none;
    margin: 30px 0;
}

.pricing-features li {
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
    position: relative;
    padding-left: 30px;
}

.pricing-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary-light);
    font-weight: bold;
}

/* ==========================================================================
   Comparativa de Planes (Tabla)
   ========================================================================== */
.table-responsive {
    overflow-x: auto;
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.compare-table th, .compare-table td {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.compare-table th:first-child, .compare-table td:first-child {
    text-align: left;
    font-weight: 600;
    color: var(--color-primary-dark);
}

.compare-table th {
    background-color: var(--color-primary-dark);
    color: var(--color-white);
    font-family: var(--font-heading);
    font-weight: 700;
}

.compare-table tbody tr {
    transition: var(--transition);
}

.compare-table tbody tr:hover {
    background-color: var(--color-primary-ultralight);
    transform: scale(1.01);
}

/* ==========================================================================
   Servicios Adicionales
   ========================================================================== */
.extras-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.extra-item {
    padding: 20px;
}

.extra-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

/* ==========================================================================
   Acerca de (About)
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.stats-grid {
    display: flex;
    gap: 30px;
    margin-top: 40px;
}

.stat-box {
    text-align: left;
}

.stat-number {
    font-size: 2.5rem;
    color: var(--color-primary);
    display: inline-block;
    margin-bottom: 0;
}

.stat-box span {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
}

.tech-illustration {
    position: relative;
    height: 400px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border-radius: 20px;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: var(--shadow-lg);
}

/* ==========================================================================
   Contacto & CTA Box
   ========================================================================== */
.cta-box {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    padding: 50px 40px;
    border-radius: var(--radius);
    box-shadow: 0 20px 40px rgba(13, 71, 161, 0.2);
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.cta-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 30px 60px rgba(13, 71, 161, 0.3);
}

.cta-box::before {
    content: '';
    position: absolute;
    top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
    pointer-events: none;
}

.cta-box h3, .cta-box p {
    color: #FFFFFF !important;
    position: relative;
    z-index: 2;
}

.cta-box p {
    opacity: 0.9;
}

.btn-whatsapp-primary {
    background: linear-gradient(90deg, #25D366, #128C7E);
    color: #FFFFFF !important;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    position: relative;
    z-index: 2;
}

.btn-whatsapp-primary:hover {
    background: linear-gradient(90deg, #128C7E, #075E54);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4);
    color: #FFFFFF !important;
}

.contact-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: var(--color-white);
    border-radius: var(--radius);
    overflow: hidden;
    margin-top: 40px;
}

.contact-info {
    padding: 50px;
    background: var(--color-primary-dark);
    color: var(--color-white);
}

.contact-info h2 {
    color: var(--color-white);
}

.contact-details {
    list-style: none;
    margin: 30px 0;
}

.contact-details li {
    margin-bottom: 15px;
    font-size: 1.05rem;
}

.map-placeholder {
    height: 150px;
    background: rgba(255,255,255,0.1);
    border: 2px dashed rgba(255,255,255,0.3);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.6);
}

.contact-form-wrapper {
    padding: 50px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text);
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(66, 165, 245, 0.2);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.main-footer {
    background: #0F172A; /* Slate muy oscuro, premium */
    color: #94A3B8;
    padding-top: 80px;
}

.footer-grid-5 {
    display: grid;
    grid-template-columns: 2fr 1.5fr 1.5fr 2fr 1fr;
    gap: 30px;
    margin-bottom: 50px;
}

.footer-brand .logo {
    color: #FFFFFF;
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.footer-brand .logo span {
    color: var(--color-primary-light);
}

.footer-brand p {
    color: #8892B0;
}

.footer-links h4 {
    color: #FFFFFF;
    margin-bottom: 20px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: #8892B0;
}

.footer-links a:hover {
    color: var(--color-primary-light);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding: 25px 0;
    border-top: 1px solid rgba(255,255,255,0.1);
}

/* ==========================================================================
   Widget Chat (Floating)
   ========================================================================== */
.chat-widget-placeholder {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    z-index: 1000;
    transition: var(--transition);
    animation: bounce 2s infinite ease-in-out;
}

.chat-widget-placeholder:hover {
    transform: scale(1.1);
    background: var(--color-primary-dark);
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* ==========================================================================
   Media Queries
   ========================================================================== */
@media screen and (max-width: 992px) {
    .about-grid, .contact-box {
        grid-template-columns: 1fr;
    }
    
    .tech-illustration {
        margin-top: 40px;
    }
    
    .pricing-card.popular {
        transform: scale(1);
    }
}

@media screen and (max-width: 768px) {
    .header-cta, #main-nav {
        display: none; /* Sería reemplazado por menú móvil JS en prod */
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .section {
        padding: 60px 0;
    }
}

/* ==========================================================================
   Dark Mode & UI Controls
   ========================================================================== */
[data-theme="dark"] {
    --color-primary-dark: #64B5F6;
    --color-primary: #42A5F5;
    --color-primary-light: #2196F3;
    --color-primary-ultralight: #1e1e1e;
    
    --color-text: #FFFFFF;
    --color-text-light: #E0E0E0;
    --color-white: #1A1A1A;
    --color-bg: #121212;
    --color-border: #333333;
}

/* Glassmorphism panel for Contact Box */
.glass-panel {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-top: 5px solid var(--color-primary);
    text-align: center;
}
[data-theme="dark"] .glass-panel {
    background: rgba(30, 41, 59, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.contact-ul { list-style: none; padding: 0; }
.contact-ul li { margin-bottom: 12px; font-size: 0.95rem; }

/* Tareas: Ajuste de contraste para fondos oscuros */
/* Hero ahora es claro en Light mode, no necesita texto blanco. Los "Extras" sí */
.bg-gradient-blue .section-title, .bg-gradient-blue .section-desc, .bg-gradient-blue .extra-item h4, .bg-gradient-blue .extra-item p {
    color: #FFFFFF !important;
}
.bg-gradient-blue .section-desc, .bg-gradient-blue .extra-item p {
    color: #E0E0E0 !important;
}

/* En Modo Oscuro, el gradiente primario se vuelve azul muy claro que arruina el contraste.
Por eso forzamos un gradiente oscuro real para estas secciones. */
[data-theme="dark"] .hero,
[data-theme="dark"] .bg-gradient-blue {
    background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%) !important;
}

[data-theme="dark"] .hero-title, [data-theme="dark"] .hero-subtitle {
    color: #F1F5F9 !important;
}

[data-theme="dark"] .hero-title span {
    color: var(--color-primary-light) !important;
}

[data-theme="dark"] .hero-badge {
    background: rgba(255, 255, 255, 0.1) !important;
    border-color: rgba(255, 255, 255, 0.2) !important;
    color: #F1F5F9 !important;
}

/* Transiciones SVG variables */
:root {
    --color-bg-transition: #FAFAFA;
}
[data-theme="dark"] {
    --color-bg-transition: #121212;
}

/* Responsividad extra para grid de 5 */
@media screen and (max-width: 992px) {
    .footer-grid-5 {
        grid-template-columns: 1fr 1fr;
    }
}
@media screen and (max-width: 768px) {
    .footer-grid-5 {
        grid-template-columns: 1fr;
    }
}

[data-theme="dark"] body {
    background-color: var(--color-bg);
}

[data-theme="dark"] #main-header {
    background: rgba(26, 26, 26, 0.95);
    border-bottom: 1px solid var(--color-border);
}

[data-theme="dark"] .tech-illustration svg rect {
    fill: #1e1e1e;
}

/* Header Controls */
.header-cta {
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.control-btn {
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 50px;
    padding: 8px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    transition: var(--transition);
    font-family: var(--font-body);
    font-weight: 600;
}

.control-btn:hover {
    background: var(--color-primary-ultralight);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.theme-icon {
    width: 20px;
    height: 20px;
}

@media screen and (max-width: 768px) {
    .header-cta {
        display: none;
    }
}