/* ==================== Variables ==================== */
:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #06b6d4;
    --accent-color: #f59e0b;
    --text-dark: #0f172a;
    --text-light: #64748b;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-dark: #0f172a;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==================== Performance Optimizations ==================== */
/* Enable GPU acceleration for animations */
.service-card,
.portfolio-card,
.visual-card,
.btn,
.gradient-ball {
    will-change: transform;
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* Contain layout changes for better rendering */
.service-card,
.portfolio-card {
    contain: layout style paint;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; /* Offset para el header fijo */
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background: var(--bg-white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==================== Typography ==================== */
h1, h2, h3, h4 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==================== Header & Navigation ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
    text-decoration: none;
}

.logo-icon {
    font-size: 28px;
}

.nav-list {
    display: flex;
    gap: 40px;
    list-style: none;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: var(--transition);
}

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.language-switcher {
    display: flex;
    gap: 4px;
    background: var(--bg-light);
    padding: 4px;
    border-radius: 50px;
}

.lang-btn {
    padding: 6px 14px;
    background: transparent;
    border: none;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
}

.lang-btn:hover {
    color: var(--text-dark);
}

.lang-btn.active {
    background: white;
    color: var(--primary-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* ==================== Hero Section ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.gradient-ball {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: float 20s infinite ease-in-out;
}

.ball-1 {
    width: 500px;
    height: 500px;
    background: var(--gradient-1);
    top: -200px;
    right: -100px;
}

.ball-2 {
    width: 400px;
    height: 400px;
    background: var(--gradient-2);
    bottom: -150px;
    left: -100px;
    animation-delay: -5s;
}

.ball-3 {
    width: 300px;
    height: 300px;
    background: var(--gradient-3);
    top: 50%;
    left: 50%;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(50px, -50px) scale(1.1); }
    66% { transform: translate(-50px, 50px) scale(0.9); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    text-align: center;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 50px;
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
    animation: slideDown 0.8s ease-out;
}

.hero-title {
    font-size: 64px;
    margin-bottom: 24px;
    animation: slideUp 0.8s ease-out;
}

.hero-description {
    font-size: 20px;
    color: var(--text-light);
    margin-bottom: 40px;
    line-height: 1.8;
    animation: slideUp 0.8s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
    animation: slideUp 0.8s ease-out 0.4s both;
}

.hero-stats {
    display: flex;
    gap: 60px;
    justify-content: center;
    animation: slideUp 0.8s ease-out 0.6s both;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== Buttons ==================== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 16px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

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

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

.btn-full {
    width: 100%;
}

/* ==================== Sections ==================== */
section {
    padding: 100px 0;
}

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

.section-title {
    font-size: 48px;
    margin-bottom: 16px;
}

.section-description {
    font-size: 18px;
    color: var(--text-light);
}

/* ==================== Services Section ==================== */
.services {
    background: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.service-card {
    background: white;
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    cursor: pointer;
}

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

.service-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 24px;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.service-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* ==================== Portfolio Section ==================== */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.portfolio-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

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

.portfolio-card.featured {
    /* Removed grid-column to allow 2-column layout */
}

.portfolio-card.hero-project {
    grid-column: 1 / -1;
    max-width: 800px;
    margin: 0 auto;
}

.portfolio-image {
    height: 300px;
    overflow: hidden;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.portfolio-card:hover .portfolio-image img {
    transform: scale(1.05);
}

.portfolio-card.featured .portfolio-image {
    height: 300px;
}

.portfolio-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-icon {
    font-size: 80px;
    filter: brightness(0) invert(1);
}

.portfolio-content {
    padding: 32px;
}

.portfolio-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(245, 158, 11, 0.1);
    color: var(--accent-color);
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.portfolio-content h3 {
    font-size: 24px;
    margin-bottom: 12px;
}

.portfolio-content p {
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.7;
}

.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.tag {
    padding: 6px 14px;
    background: var(--bg-light);
    border-radius: 50px;
    font-size: 13px;
    color: var(--text-dark);
    font-weight: 500;
}

.portfolio-actions {
    display: flex;
    gap: 16px;
    align-items: center;
    flex-wrap: wrap;
}

.portfolio-link {
    display: inline-block;
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.portfolio-link:hover {
    gap: 8px;
    transform: translateX(4px);
}

.btn-buy {
    padding: 12px 24px;
    font-size: 14px;
    white-space: nowrap;
}

/* ==================== About Section ==================== */
.about {
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 42px;
    margin-bottom: 24px;
}

.about-lead {
    font-size: 20px;
    color: var(--text-dark);
    margin-bottom: 20px;
    font-weight: 500;
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 30px;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.feature-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    font-size: 12px;
    font-weight: 700;
}

.about-visual {
    display: grid;
    gap: 24px;
}

.visual-card {
    background: white;
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.visual-card:hover {
    transform: translateX(8px);
}

.visual-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.visual-card h3 {
    font-size: 24px;
    margin-bottom: 8px;
}

.visual-card p {
    color: var(--text-light);
}

/* ==================== Contact Section ==================== */
.contact {
    background: var(--bg-dark);
    color: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h2 {
    font-size: 42px;
    margin-bottom: 16px;
}

.contact-info p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 24px;
}

.contact-item h4 {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 4px;
    font-weight: 500;
}

.contact-item a {
    color: white;
    text-decoration: none;
    font-size: 18px;
    transition: var(--transition);
}

.contact-item a:hover {
    color: var(--secondary-color);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px 20px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    color: white;
    font-size: 16px;
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.08);
}

/* ==================== Footer ==================== */
.footer {
    background: var(--text-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.footer-column h4 {
    color: white;
    margin-bottom: 16px;
    font-size: 16px;
}

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

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--secondary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 14px;
}

/* ==================== Responsive Design ==================== */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: white;
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
        padding: 30px 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-list {
        flex-direction: column;
        gap: 0;
        text-align: center;
    }

    .nav-link {
        display: block;
        padding: 15px 0;
    }

    .nav-actions {
        gap: 12px;
    }

    .language-switcher {
        transform: scale(0.9);
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 42px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-stats {
        gap: 30px;
    }

    .section-title {
        font-size: 36px;
    }

    .services-grid,
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .portfolio-card.featured {
        /* Single column on mobile */
    }

    .portfolio-image,
    .portfolio-card.featured .portfolio-image {
        height: 250px;
    }

    .about-content,
    .contact-content,
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-features {
        grid-template-columns: 1fr;
    }
}

/* Tablet - maintain 2 columns for portfolio */
@media (max-width: 768px) and (min-width: 641px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 32px;
    }

    .hero-description {
        font-size: 16px;
    }

    .section-title {
        font-size: 28px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .contact-info h2,
    .about-text h2 {
        font-size: 32px;
    }

    /* Mobile - single column for portfolio */
    .portfolio-grid {
        grid-template-columns: 1fr !important;
    }
}