/* ==========================================
   PLASTICOS SERNA SL - Estilos Principales
   Diseño Moderno Profesional Español
   ========================================== */

/* ===== VARIABLES CSS ===== */
:root {
    /* Colores Principales */
    --primary-color: #0066cc;
    --primary-dark: #004c99;
    --primary-light: #3385e6;
    --secondary-color: #00b894;
    --accent-color: #ff6b35;

    /* Colores Neutros */
    --dark-bg: #1a1a2e;
    --darker-bg: #0f0f1e;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --gray-50: #f8f9fa;
    --gray-100: #e9ecef;
    --gray-200: #dee2e6;
    --gray-300: #ced4da;
    --gray-400: #adb5bd;
    --gray-500: #6c757d;
    --gray-600: #495057;
    --gray-700: #343a40;
    --gray-800: #212529;
    --gray-900: #0d1117;

    /* Gradientes */
    --gradient-primary: linear-gradient(135deg, #0066cc 0%, #00b894 100%);
    --gradient-dark: linear-gradient(135deg, #1a1a2e 0%, #0f0f1e 100%);
    --gradient-overlay: linear-gradient(180deg, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.4) 100%);

    /* Sombras */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.16);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.24);
    --shadow-glow: 0 0 40px rgba(0,102,204,0.3);

    /* Transiciones */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;

    /* Bordes */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Tipografía */
    --font-primary: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-secondary: 'Roboto', 'Helvetica Neue', Arial, sans-serif;
}

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

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

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--white);
    overflow-x: hidden;
}

/* ===== THREE.JS CANVAS BACKGROUND ===== */
#three-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.6;
}

/* ===== HEADER & NAVIGATION ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-lg);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

/* ===== LOGO ===== */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition-normal);
}

.logo:hover {
    transform: scale(1.02);
}

.logo-icon {
    width: 50px;
    height: 50px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-dark);
    line-height: 1.2;
    letter-spacing: -0.5px;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--gray-500);
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* ===== NAVIGATION ===== */
.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-xs);
    align-items: center;
}

.nav-link {
    position: relative;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--gray-700);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-normal);
    transform: translateX(-50%);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: rgba(0, 102, 204, 0.08);
}

.nav-link:hover::before,
.nav-link.active::before {
    width: 80%;
}

.nav-link .material-icons {
    font-size: 1.25rem;
}

/* ===== MOBILE MENU ===== */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    color: var(--gray-700);
}

.mobile-toggle .material-icons {
    font-size: 1.75rem;
}

/* ===== HERO SECTION ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin-top: 80px;
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 900px;
    padding: var(--spacing-xl);
    color: var(--white);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.hero-title span {
    display: block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.25rem);
    opacity: 0.95;
    margin-bottom: var(--spacing-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition-normal);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 102, 204, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* ===== SLIDESHOW ===== */
.slideshow-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.slideshow-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.slideshow-slide.active {
    opacity: 1;
}

.slideshow-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slideshow-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-overlay);
}

/* ===== SECTIONS ===== */
.section {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

.section-dark {
    background: var(--dark-bg);
    color: var(--white);
}

.section-light {
    background: var(--light-bg);
}

.section-white {
    background: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(0, 102, 204, 0.1);
    color: var(--primary-color);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.section-dark .section-title {
    color: var(--white);
}

.section-description {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto;
}

.section-dark .section-description {
    color: rgba(255,255,255,0.8);
}

/* ===== CARDS ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 1px solid var(--gray-100);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.card-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.card-content {
    padding: var(--spacing-lg);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.card-icon .material-icons {
    font-size: 2rem;
    color: var(--white);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.card-description {
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
}

.card-link:hover {
    color: var(--primary-dark);
    gap: var(--spacing-sm);
}

/* ===== STATS SECTION ===== */
.stats-section {
    background: var(--gradient-primary);
    padding: var(--spacing-2xl) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.stat-item {
    text-align: center;
    color: var(--white);
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 1.125rem;
    opacity: 0.9;
}

/* ===== GALLERY ===== */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.gallery-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/3;
    cursor: pointer;
    transition: var(--transition-normal);
}

.gallery-item:hover {
    transform: scale(1.03);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-lg);
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: var(--white);
    transform: translateY(100%);
    transition: var(--transition-normal);
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

.gallery-title {
    font-size: 1.125rem;
    font-weight: 600;
}

/* ===== FORM ===== */
.form-container {
    max-width: 700px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.form {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

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

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--gray-700);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

/* ===== CONTACT INFO ===== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1200px;
    margin: 0 auto var(--spacing-2xl);
    padding: 0 var(--spacing-lg);
}

.contact-card {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: rgba(0, 102, 204, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon .material-icons {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.contact-content h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--gray-900);
}

.contact-content p {
    color: var(--gray-600);
}

/* ===== MAP ===== */
.map-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.map-container iframe {
    width: 100%;
    height: 400px;
    border-radius: var(--radius-xl);
    border: none;
    box-shadow: var(--shadow-lg);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--darker-bg);
    color: var(--white);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand .logo {
    color: var(--white);
}

.footer-brand .logo-title {
    color: var(--white);
}

.footer-brand .logo-subtitle {
    color: rgba(255,255,255,0.7);
}

.footer-brand p {
    margin-top: var(--spacing-md);
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

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

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
    color: rgba(255,255,255,0.6);
    font-size: 0.875rem;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeInUp 0.6s ease forwards;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .nav-list {
        gap: var(--spacing-xs);
    }

    .nav-link {
        padding: var(--spacing-sm);
        font-size: 0.875rem;
    }
}

@media (max-width: 768px) {
    .header-container {
        padding: 0 var(--spacing-md);
    }

    .mobile-toggle {
        display: block;
    }

    .nav-list {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-normal);
    }

    .nav-list.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        width: 100%;
        padding: var(--spacing-md);
        border-radius: var(--radius-md);
    }

    .hero {
        margin-top: 70px;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .section {
        padding: var(--spacing-xl) 0;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .logo-title {
        font-size: 1.25rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }
}