/* 
* Estilos para Pinturas y Limpieza Sercam - Versión Luxury con Tema Claro/Oscuro
* Autor: Manus
* Fecha: Mayo 2025
*/

/* ===== VARIABLES Y RESET ===== */
:root {
    /* Paleta de colores - Tema Oscuro (default) */
    --color-primary: #000000;      /* Negro puro */
    --color-secondary: #333333;    /* Negro grafito */
    --color-accent: #ffffff;       /* Blanco */
    --color-cta: #25D366;          /* Verde de WhatsApp */
    --color-dark-gray: #1a1a1a;    /* Gris muy oscuro */
    --color-medium-gray: #444444;  /* Gris medio */
    --color-light-gray: #f5f5f5;   /* Gris muy claro */
    
    /* Colores adicionales - Tema Oscuro */
    --color-bg-dark: #0a0a0a;
    --color-text: #e0e0e0;
    --color-text-dark: #aaaaaa;
    --color-border: #333333;
    --color-card-bg: rgba(25, 25, 25, 0.7);
    --color-card-border: rgba(60, 60, 60, 0.3);
    --color-card-hover: rgba(30, 30, 30, 0.8);
    --color-header-bg: rgba(0, 0, 0, 0.9);
    --color-form-bg: rgba(30, 30, 30, 0.7);
    --color-form-focus: rgba(40, 40, 40, 0.8);
    --color-hero-overlay: linear-gradient(135deg, rgba(0, 0, 0, 0.9) 0%, rgba(40, 40, 40, 0.7) 50%, rgba(0, 0, 0, 0.9) 100%);
    --color-section-overlay: radial-gradient(circle at center, rgba(30, 30, 30, 0.4) 0%, rgba(10, 10, 10, 0.8) 100%);
    
    /* Tipografía */
    --font-primary: 'Montserrat', sans-serif;
    --font-secondary: 'Dancing Script', cursive;
    
    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    
    /* Bordes y sombras */
    --border-radius: 3px;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    --box-shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.4);
    
    /* Transiciones */
    --transition: all 0.3s ease;
}

/* Variables para el tema claro */
.light-theme {
    --color-primary: #ffffff;      /* Blanco */
    --color-secondary: #f0f0f0;    /* Gris muy claro */
    --color-accent: #222222;       /* Negro suave */
    --color-dark-gray: #e5e5e5;    /* Gris claro */
    --color-medium-gray: #bbbbbb;  /* Gris medio */
    --color-light-gray: #333333;   /* Gris oscuro */
    
    /* Colores adicionales - Tema Claro */
    --color-bg-dark: #f5f5f5;
    --color-text: #333333;
    --color-text-dark: #555555;
    --color-border: #dddddd;
    --color-card-bg: rgba(245, 245, 245, 0.9);
    --color-card-border: rgba(200, 200, 200, 0.5);
    --color-card-hover: rgba(255, 255, 255, 1);
    --color-header-bg: rgba(255, 255, 255, 0.95);
    --color-form-bg: rgba(240, 240, 240, 0.9);
    --color-form-focus: rgba(250, 250, 250, 1);
    --color-hero-overlay: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(230, 230, 230, 0.7) 50%, rgba(255, 255, 255, 0.9) 100%);
    --color-section-overlay: radial-gradient(circle at center, rgba(240, 240, 240, 0.6) 0%, rgba(255, 255, 255, 0.9) 100%);
    
    /* Sombras para tema claro */
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --box-shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* Reset y estilos base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    background-color: var(--color-bg-dark);
    transition: background-color 0.5s ease, color 0.5s ease;
}

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

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

ul {
    list-style: none;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.section-title {
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
    color: var(--color-accent);
    letter-spacing: 1px;
    text-transform: uppercase;
    font-weight: 600;
    transition: color 0.5s ease;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-medium-gray), var(--color-primary));
    transition: background 0.5s ease;
}

/* ===== BOTONES ===== */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.btn-primary {
    background-color: var(--color-cta);
    color: #ffffff;
    box-shadow: 0 4px 10px rgba(37, 211, 102, 0.3);
}

.btn-primary:hover {
    background-color: #1da851;
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(37, 211, 102, 0.4);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
    transition: background-color 0.3s ease, color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.btn-secondary:hover {
    background-color: var(--color-accent);
    color: var(--color-primary);
    transform: translateY(-3px);
    box-shadow: var(--box-shadow);
}

/* ===== BOTÓN WHATSAPP FLOTANTE ===== */
.whatsapp-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    background-color: var(--color-cta);
    color: white;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    transition: var(--transition);
    animation: pulse 2s infinite;
}

.whatsapp-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.4);
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.5);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(37, 211, 102, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0);
    }
}

/* ===== HEADER ===== */
.header {
    background-color: var(--color-header-bg);
    padding: var(--spacing-sm) 0;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(5px);
    transition: background-color 0.5s ease;
}

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

.logo-container {
    width: 150px;
}

.logo {
    width: 100%;
}

.nav ul {
    display: flex;
}

.nav ul li {
    margin-left: var(--spacing-md);
}

.nav ul li a {
    color: var(--color-accent);
    font-weight: 500;
    position: relative;
    padding: 5px 0;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    transition: color 0.5s ease;
}

.nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-accent);
    transition: width 0.3s ease, background-color 0.5s ease;
}

.nav ul li a:hover::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    color: var(--color-accent);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.5s ease;
}

/* Selector de tema */
.theme-toggle {
    color: var(--color-accent);
    font-size: 1.3rem;
    cursor: pointer;
    margin-left: var(--spacing-md);
    transition: color 0.3s ease, transform 0.3s ease;
}

.theme-toggle:hover {
    transform: rotate(15deg);
}

/* ===== HERO SECTION ===== */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--color-accent);
    overflow: hidden;
}

.luxury-hero {
    background-color: var(--color-primary);
    transition: background-color 0.5s ease;
}

.hero-texture {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-bg-dark);
    background-image: 
        linear-gradient(0deg, rgba(40, 40, 40, 0.3) 1px, transparent 1px),
        linear-gradient(90deg, rgba(40, 40, 40, 0.3) 1px, transparent 1px),
        linear-gradient(rgba(40, 40, 40, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(40, 40, 40, 0.1) 1px, transparent 1px),
        linear-gradient(0deg, rgba(60, 60, 60, 0.1) 1px, transparent 1px);
    background-size: 100px 100px, 100px 100px, 20px 20px, 20px 20px, 10px 10px;
    background-position: -1px -1px, -1px -1px, -1px -1px, -1px -1px, -1px -1px;
    opacity: 0.6;
    transition: background-color 0.5s ease;
}

.light-theme .hero-texture {
    background-image: 
        linear-gradient(0deg, rgba(180, 180, 180, 0.3) 1px, transparent 1px),
        linear-gradient(90deg, rgba(180, 180, 180, 0.3) 1px, transparent 1px),
        linear-gradient(rgba(180, 180, 180, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(180, 180, 180, 0.1) 1px, transparent 1px),
        linear-gradient(0deg, rgba(150, 150, 150, 0.1) 1px, transparent 1px);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-hero-overlay);
    transition: background 0.5s ease;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

.hero h1 {
    font-size: 3.2rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    line-height: 1.2;
    background: linear-gradient(to right, var(--color-accent), var(--color-text-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
    transition: background 0.5s ease;
}

.hero h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    font-weight: 400;
    color: var(--color-text-dark);
    letter-spacing: 1px;
    transition: color 0.5s ease;
}

/* ===== SERVICIOS SECTION ===== */
.servicios {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg-dark);
    position: relative;
    transition: background-color 0.5s ease;
}

.servicios::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-section-overlay);
    pointer-events: none;
    transition: background 0.5s ease;
}

.servicios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.servicio-card {
    background-color: var(--color-card-bg);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--box-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.5s ease, border-color 0.5s ease;
    text-align: center;
    border: 1px solid var(--color-card-border);
    backdrop-filter: blur(5px);
}

.servicio-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow-hover);
    background-color: var(--color-card-hover);
    border-color: var(--color-medium-gray);
}

.servicio-icon {
    font-size: 2.5rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    transition: color 0.5s ease;
}

.servicio-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
    font-weight: 600;
    letter-spacing: 1px;
    transition: color 0.5s ease;
}

.servicio-card p {
    color: var(--color-text-dark);
    transition: color 0.5s ease;
}

/* ===== POR QUÉ ELEGIRNOS SECTION ===== */
.por-que-elegirnos {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-primary);
    color: var(--color-text);
    position: relative;
    transition: background-color 0.5s ease, color 0.5s ease;
}

.por-que-elegirnos::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(0, 0, 0, 0.9) 0%, rgba(30, 30, 30, 0.7) 50%, rgba(0, 0, 0, 0.9) 100%);
    pointer-events: none;
    transition: background 0.5s ease;
}

.light-theme .por-que-elegirnos::before {
    background: linear-gradient(45deg, rgba(240, 240, 240, 0.9) 0%, rgba(255, 255, 255, 0.7) 50%, rgba(240, 240, 240, 0.9) 100%);
}

.por-que-elegirnos .section-title {
    color: var(--color-accent);
    position: relative;
    z-index: 1;
    transition: color 0.5s ease;
}

.ventajas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.ventaja-card {
    padding: var(--spacing-md);
    text-align: center;
    transition: transform 0.3s ease, background-color 0.5s ease;
    background-color: var(--color-card-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-card-border);
}

.ventaja-card:hover {
    background-color: var(--color-card-hover);
    transform: translateY(-5px);
}

.ventaja-icon {
    font-size: 2.5rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    transition: color 0.5s ease;
}

.ventaja-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
    font-weight: 600;
    letter-spacing: 1px;
    transition: color 0.5s ease;
}

.ventaja-card p {
    color: var(--color-text-dark);
    transition: color 0.5s ease;
}

/* ===== CTA SECTION ===== */
.cta-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-dark-gray);
    color: var(--color-accent);
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: background-color 0.5s ease, color 0.5s ease;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.8) 0%, rgba(30, 30, 30, 0.6) 50%, rgba(0, 0, 0, 0.8) 100%);
    pointer-events: none;
    transition: background 0.5s ease;
}

.light-theme .cta-section::before {
    background: linear-gradient(135deg, rgba(230, 230, 230, 0.8) 0%, rgba(250, 250, 250, 0.6) 50%, rgba(230, 230, 230, 0.8) 100%);
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
    font-weight: 600;
    transition: color 0.5s ease;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
    color: var(--color-text-dark);
    transition: color 0.5s ease;
}

.cta-section .btn-secondary {
    position: relative;
    z-index: 1;
}

/* ===== CONTACTO SECTION ===== */
.contacto {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg-dark);
    position: relative;
    transition: background-color 0.5s ease;
}

.contacto::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-section-overlay);
    pointer-events: none;
    transition: background 0.5s ease;
}

.contacto-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.contacto-info h3,
.contacto-form h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
    font-weight: 600;
    letter-spacing: 1px;
    transition: color 0.5s ease;
}

.contacto-item {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.contacto-item i {
    font-size: 1.5rem;
    color: var(--color-accent);
    margin-right: var(--spacing-sm);
    transition: color 0.5s ease;
}

.contacto-item a:hover {
    color: var(--color-cta);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--color-text);
    transition: color 0.5s ease;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-family: var(--font-primary);
    background-color: var(--color-form-bg);
    color: var(--color-accent);
    transition: border-color 0.3s ease, background-color 0.5s ease, color 0.5s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-medium-gray);
    background-color: var(--color-form-focus);
    box-shadow: 0 0 5px rgba(100, 100, 100, 0.3);
}

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

/* ===== FOOTER ===== */
.footer {
    background-color: var(--color-primary);
    color: var(--color-text);
    padding: var(--spacing-lg) 0 var(--spacing-sm);
    transition: background-color 0.5s ease, color 0.5s ease;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.logo-footer {
    width: 120px;
}

.footer-info p {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-dark);
    transition: color 0.5s ease;
}

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

.footer-social {
    display: flex;
    justify-content: flex-end;
}

.footer-social a {
    font-size: 1.8rem;
    color: var(--color-text-dark);
    margin-left: var(--spacing-sm);
    transition: color 0.3s ease, transform 0.3s ease;
}

.footer-social a:hover {
    color: var(--color-accent);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-card-border);
    color: var(--color-text-dark);
    font-size: 0.9rem;
    transition: color 0.5s ease, border-color 0.5s ease;
}

/* Clase para animaciones de aparición */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== MEDIA QUERIES ===== */
@media (max-width: 1024px) {
    html {
        font-size: 15px;
    }
    
    .hero h1 {
        font-size: 2.8rem;
    }
    
    .hero h2 {
        font-size: 1.3rem;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background-color: var(--color-header-bg);
        transition: right 0.3s ease, background-color 0.5s ease;
        z-index: 200;
        padding-top: 80px;
        backdrop-filter: blur(10px);
    }
    
    .nav.active {
        right: 0;
    }
    
    .nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    .nav ul li {
        margin: var(--spacing-sm) 0;
    }
    
    .menu-toggle {
        display: block;
        z-index: 300;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero h2 {
        font-size: 1.1rem;
    }
    
    .contacto-grid,
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .contacto-form {
        margin-top: var(--spacing-md);
    }
    
    .footer-social {
        justify-content: center;
        margin-top: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 1.8rem;
    }
    
    .hero {
        height: 90vh;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .servicios-grid,
    .ventajas-grid {
        grid-template-columns: 1fr;
    }
    
    .whatsapp-btn {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
}