/* ============================================
   BATERÍAS EXPRESS - Landing Page Optimizada
   Stack: CSS3 Moderno con Variables
   Diseño: Mobile-First, Dark Mode Profesional
   ============================================ */

/* ========== VARIABLES CSS ========== */
:root {
    /* Colores - Inspirados en baterías MAC */
    --color-primary: #C41E3A;           /* Rojo MAC */
    --color-primary-dark: #9B1B30;      /* Rojo oscuro */
    --color-primary-light: #E63950;     /* Rojo claro */
    
    --color-secondary: #FF6600;         /* Naranja vibrante */
    --color-secondary-dark: #CC5200;    /* Naranja oscuro */
    
    --color-whatsapp: #25D366;          /* Verde WhatsApp */
    --color-whatsapp-dark: #1DA851;     /* Verde oscuro */
    
    /* Fondo Dark Mode */
    --color-bg-dark: #0A0E17;           /* Azul muy oscuro */
    --color-bg-card: #111827;           /* Fondo tarjetas */
    --color-bg-elevated: #1F2937;       /* Elementos elevados */
    
    /* Textos */
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #9CA3AF;
    --color-text-muted: #6B7280;
    
    /* Acentos */
    --color-accent: #FFD700;            /* Dorado/Amarillo */
    --color-success: #10B981;
    --color-border: #374151;
    
    /* Tipografía */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.5);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.6);
    --shadow-glow-primary: 0 0 20px rgba(196,30,58,0.4);
    --shadow-glow-whatsapp: 0 0 20px rgba(37,211,102,0.4);
    --shadow-glow-secondary: 0 0 20px rgba(255,102,0,0.4);
    
    /* Transiciones */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Z-index */
    --z-header: 100;
    --z-sticky-nav: 200;
    --z-modal: 300;
}

/* ========== RESET & BASE ========== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-dark);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    padding-bottom: 70px; /* Espacio para sticky nav móvil */
}

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

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

ul {
    list-style: none;
}

/* ========== UTILIDADES ========== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.text-accent {
    color: var(--color-accent);
}

.highlight {
    color: var(--color-primary);
    text-shadow: 0 0 30px rgba(196,30,58,0.5);
}

/* ========== BOTONES ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-family: var(--font-primary);
    font-weight: 700;
    text-align: center;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-2px);
}

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

/* Tamaños de botón */
.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.75rem;
}

.btn-md {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 0.875rem;
}

.btn-xl {
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: 1rem;
    min-width: 200px;
}

.btn-block {
    width: 100%;
}

/* Variantes de botón */
.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-text-primary);
    box-shadow: var(--shadow-glow-primary);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    box-shadow: 0 0 30px rgba(196,30,58,0.6);
}

.btn-whatsapp {
    background: linear-gradient(135deg, var(--color-whatsapp) 0%, var(--color-whatsapp-dark) 100%);
    color: var(--color-text-primary);
    box-shadow: var(--shadow-glow-whatsapp);
}

.btn-whatsapp:hover {
    background: linear-gradient(135deg, #2EE370 0%, var(--color-whatsapp) 100%);
    box-shadow: 0 0 30px rgba(37,211,102,0.6);
}

.btn-call {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-dark) 100%);
    color: var(--color-text-primary);
    box-shadow: var(--shadow-glow-secondary);
}

.btn-call:hover {
    background: linear-gradient(135deg, #FF7A1A 0%, var(--color-secondary) 100%);
    box-shadow: 0 0 30px rgba(255,102,0,0.6);
}

/* ========== HEADER ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-header);
    background: rgba(10,14,23,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
}

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

.logo img {
    height: 35px;
    width: auto;
}

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.header-actions .btn span {
    display: none;
}

/* ========== HERO SECTION ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 80px 0 var(--spacing-2xl);
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, #0F172A 50%, #1E1B4B 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(196,30,58,0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255,102,0,0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: url('imagenes/mac_bateria_medellin.webp') center/cover no-repeat;
    opacity: 0.1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(196,30,58,0.2);
    border: 1px solid var(--color-primary);
    color: var(--color-text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    animation: pulse-badge 2s infinite;
}

.pulse {
    width: 10px;
    height: 10px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

@keyframes pulse-badge {
    0%, 100% { box-shadow: 0 0 0 0 rgba(196,30,58,0.4); }
    50% { box-shadow: 0 0 0 10px rgba(196,30,58,0); }
}

.hero-title {
    font-size: 2rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
}

.hero-subtitle {
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.hero-subtitle strong {
    color: var(--color-text-primary);
}

.hero-ctas {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.hero-urgency {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.urgency-icon {
    font-size: 1.25rem;
    animation: flash 1s infinite;
}

@keyframes flash {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* ========== BARRA DE CONFIANZA ========== */
.trust-bar {
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
}

.trust-items {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.trust-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
}

.trust-icon {
    font-size: 1.5rem;
}

.trust-item span {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

.trust-item strong {
    color: var(--color-text-primary);
}

/* ========== SECCIONES COMUNES ========== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.section-title-sm {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-subtitle {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* ========== SERVICIOS ========== */
.services {
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg-dark);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.service-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.service-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-image {
    background: linear-gradient(135deg, var(--color-bg-elevated) 0%, var(--color-bg-card) 100%);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 120px;
}

.service-image img {
    max-height: 80px;
    object-fit: contain;
}

.service-content {
    padding: var(--spacing-md);
}

.service-content h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.service-content p {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.service-features {
    margin-bottom: var(--spacing-md);
}

.service-features li {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
}

/* ========== MARCAS ========== */
.brands {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-card);
    overflow: hidden;
}

.brands-slider {
    overflow: hidden;
    mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}

.brands-track {
    display: flex;
    gap: var(--spacing-xl);
    animation: scroll 20s linear infinite;
}

.brand-item {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 160px;
    height: 90px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.brand-item:hover {
    border-color: var(--color-primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow-primary);
    background: var(--color-bg-card);
}

.brand-text {
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    text-align: center;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ========== COBERTURA ========== */
.coverage {
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg-dark);
}

.coverage-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    transition: all var(--transition-normal);
}

.badge-primary {
    background: rgba(196,30,58,0.15);
    border: 1px solid rgba(196,30,58,0.3);
    color: var(--color-primary-light);
}

.badge-primary:hover {
    background: rgba(196,30,58,0.25);
    border-color: var(--color-primary);
}

.coverage-cta {
    text-align: center;
}

.coverage-cta p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 0.9rem;
}

/* ========== VENTAJAS ========== */
.advantages {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(180deg, var(--color-bg-card) 0%, var(--color-bg-dark) 100%);
}

.advantages-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.advantage-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
}

.advantage-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-5px);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.advantage-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.advantage-card p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ========== CTA FINAL ========== */
.final-cta {
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg-dark);
}

.cta-box {
    background: linear-gradient(135deg, rgba(196,30,58,0.2) 0%, rgba(255,102,0,0.1) 100%);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
}

.cta-box h2 {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
}

.cta-box p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    font-size: 0.9rem;
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* ========== FOOTER ========== */
.footer {
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    margin-bottom: 70px; /* Espacio para sticky nav */
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand img {
    height: 35px;
    margin-bottom: var(--spacing-md);
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer-contact h4,
.footer-hours h4 {
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.footer-contact ul li {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.footer-contact a:hover {
    color: var(--color-primary-light);
}

.footer-hours p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

/* ========== STICKY BOTTOM NAV (MÓVIL) ========== */
.sticky-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky-nav);
    display: flex;
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border);
    box-shadow: 0 -4px 20px rgba(0,0,0,0.5);
}

.sticky-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all var(--transition-fast);
}

.sticky-whatsapp {
    background: linear-gradient(135deg, var(--color-whatsapp) 0%, var(--color-whatsapp-dark) 100%);
    color: white;
}

.sticky-whatsapp:hover,
.sticky-whatsapp:active {
    background: linear-gradient(135deg, #2EE370 0%, var(--color-whatsapp) 100%);
}

.sticky-call {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-dark) 100%);
    color: white;
}

.sticky-call:hover,
.sticky-call:active {
    background: linear-gradient(135deg, #FF7A1A 0%, var(--color-secondary) 100%);
}

/* ========== RESPONSIVE - TABLET ========== */
@media (min-width: 640px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-ctas {
        flex-direction: row;
        justify-content: center;
    }
    
    .trust-items {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .trust-item {
        flex-direction: row;
        text-align: left;
        gap: var(--spacing-sm);
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .cta-buttons {
        flex-direction: row;
        justify-content: center;
    }
    
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ========== RESPONSIVE - DESKTOP ========== */
@media (min-width: 1024px) {
    body {
        padding-bottom: 0;
    }
    
    /* Ocultar sticky nav en desktop */
    .sticky-bottom-nav {
        display: none;
    }
    
    .footer {
        margin-bottom: 0;
    }
    
    /* Header mejorado */
    .header-actions .btn span {
        display: inline;
    }
    
    .header-actions .btn-sm {
        padding: var(--spacing-sm) var(--spacing-lg);
    }
    
    /* Hero mejorado */
    .hero {
        padding: 120px 0 var(--spacing-3xl);
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-ctas .btn-xl {
        padding: var(--spacing-lg) var(--spacing-2xl);
        font-size: 1.1rem;
        min-width: 250px;
    }
    
    /* Servicios grid */
    .services-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-lg);
    }
    
    .service-image {
        min-height: 150px;
    }
    
    .service-image img {
        max-height: 100px;
    }
    
    /* Ventajas grid */
    .advantages-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    /* CTA box */
    .cta-box {
        padding: var(--spacing-2xl);
    }
    
    .cta-box h2 {
        font-size: 1.75rem;
    }
    
    /* Footer */
    .footer-brand {
        max-width: 300px;
    }
}

/* ========== RESPONSIVE - LARGE DESKTOP ========== */
@media (min-width: 1280px) {
    .hero-title {
        font-size: 4rem;
    }
    
    .hero-subtitle {
        font-size: 1.4rem;
    }
}

/* ========== ACCESIBILIDAD ========== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .brands-track {
        animation: none;
    }
}

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

/* ========== PERFORMANCE - CRITICAL CSS ========== */
/* Estilos críticos above-the-fold ya están al inicio */

/* Lazy load placeholder */
img[loading="lazy"] {
    background: var(--color-bg-elevated);
}