:root {
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.2);
    --shadow-hover: 0 12px 40px rgba(0,0,0,0.25);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
}

/* Modo oscuro (default) */
body.dark {
    --bg-primary: #0a0a0a;
    --bg-secondary: #0f0f0f;
    --bg-card: #141414;
    --bg-header: rgba(10,10,10,0.9);
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #6b6b6b;
    --accent: #00ffa6;
    --accent-dark: #00cc88;
    --border: #222222;
    --card-hover: #1a1a1a;
    --footer-border: #1a1a1a;
    --input-bg: #1a1a1a;
}

/* Modo claro - TONOS GRISES (sin blanco puro) */
body.light {
    --bg-primary: #1e1e1e;
    --bg-secondary: #252525;
    --bg-card: #2a2a2a;
    --bg-header: rgba(30,30,30,0.95);
    --text-primary: #e8e8e8;
    --text-secondary: #b0b0b0;
    --text-muted: #888888;
    --accent: #00ffa6;
    --accent-dark: #00cc88;
    --border: #3a3a3a;
    --card-hover: #2f2f2f;
    --footer-border: #2a2a2a;
    --input-bg: #2a2a2a;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

/* HEADER */
header {
    position: fixed;
    top: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 2.5rem;
    background: var(--bg-header);
    backdrop-filter: blur(12px);
    z-index: 1000;
    transition: all var(--transition-normal);
    border-bottom: 1px solid var(--border);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.logo span {
    color: var(--accent);
}

nav a {
    margin: 0 1.2rem;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width var(--transition-normal);
}

nav a:hover::after {
    width: 100%;
}

nav a:hover {
    color: var(--accent);
}

.header-controls button {
    margin-left: 0.8rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    padding: 0.4rem 0.8rem;
    border-radius: 30px;
    transition: all var(--transition-fast);
}

.header-controls button:hover {
    background: var(--accent);
    color: var(--bg-primary);
    transform: scale(1.05);
}

/* HERO */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    background: linear-gradient(135deg, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.6) 100%);
}

body.light .hero {
    background: linear-gradient(135deg, #2a2a2a 0%, #1e1e1e 100%);
}

.hero-content {
    max-width: 800px;
    padding: 2rem;
    z-index: 2;
}

.hero h1 {
    font-size: 5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
}

.subtitle {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 1rem;
    font-weight: 500;
}

.tagline {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    background: var(--accent);
    color: var(--bg-primary);
    padding: 0.9rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    background: var(--accent-dark);
}

/* Scroll indicator */
.hero-scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.hero-scroll-indicator span {
    display: block;
    width: 2px;
    height: 40px;
    background: var(--accent);
}

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

/* Animaciones al hacer scroll */
.animate-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Secciones */
.section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Grid y Cards */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

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

.card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
    font-weight: 600;
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.card-hover-effect {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--accent);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.card:hover .card-hover-effect {
    transform: scaleX(1);
}

/* Proyectos */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    text-decoration: none;
    color: inherit;
    display: block;
    text-align: left;
}

.project-card h3 {
    font-size: 1.4rem;
}

.project-preview {
    margin: 0.8rem 0;
}

.project-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--accent);
    font-weight: 500;
    transition: transform var(--transition-fast);
}

.project-card:hover .project-link {
    transform: translateX(5px);
}

/* SECCIÓN DIVIDIDA: QUIÉNES SOMOS + FORMULARIO */
.split-section {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    max-width: 100%;
    padding: 5rem 2rem;
}

.split-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.split-left, .split-right {
    padding: 1rem;
}

.split-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
}

.split-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--accent);
}

.split-text {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.7;
}

/* Formulario */
.contact-form-split {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.9rem 1rem;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(0,255,166,0.1);
}

.form-submit {
    background: var(--accent);
    color: var(--bg-primary);
    border: none;
    padding: 0.9rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
}

.form-submit:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
}

.form-message-split {
    margin-top: 1rem;
    font-size: 0.85rem;
    text-align: center;
}

.form-message-split.success {
    color: var(--accent);
}

.form-message-split.error {
    color: #ff6b6b;
}

/* FOOTER */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--footer-border);
    padding: 3rem 2rem 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.footer-brand {
    text-align: center;
}

.footer-logo {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.footer-logo span {
    color: var(--accent);
}

.footer-tagline {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Banderas */
.footer-flags {
    text-align: center;
}

.flag-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: block;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.flags {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.flag-icon {
    width: 28px;
    height: 20px;
    object-fit: cover;
    border-radius: 2px;
    box-shadow: var(--shadow-sm);
}

.flag-name {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-left: 0.3rem;
}

.footer-copyright {
    text-align: center;
    font-size: 0.7rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
    padding-top: 2rem;
}

/* WhatsApp */
.whatsapp-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 52px;
    height: 52px;
    background: #25D366;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    z-index: 1000;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.whatsapp-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

/* Panel fullscreen */
.web-panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0,0,0,0.95);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: all var(--transition-normal);
}

body.light .web-panel {
    background: rgba(30,30,30,0.98);
}

.web-panel.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.web-panel-content {
    width: 90%;
    max-width: 1200px;
    text-align: center;
    max-height: 90vh;
    overflow-y: auto;
    padding: 2rem;
}

.web-panel-content h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.panel-subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.web-pricing {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.price-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    position: relative;
    transition: all var(--transition-normal);
    border: 1px solid var(--border);
}

.price-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.price-card.featured {
    border: 2px solid var(--accent);
    transform: scale(1.02);
}

.featured-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: var(--bg-primary);
    padding: 0.2rem 1rem;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
}

.price-card h3 {
    font-size: 1.5rem;
    margin: 1rem 0;
}

.price-features {
    list-style: none;
    margin: 1.5rem 0;
    text-align: left;
}

.price-features li {
    margin: 0.5rem 0;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.price {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
    margin: 1rem 0;
}

.price-cta {
    display: inline-block;
    background: var(--accent);
    color: var(--bg-primary);
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.price-cta:hover {
    transform: translateX(5px);
}

.close-panel {
    position: absolute;
    top: 2rem;
    right: 2rem;
    font-size: 2rem;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.close-panel:hover {
    transform: scale(1.1);
}

/* Responsive */
@media (max-width: 768px) {
    header {
        padding: 1rem;
    }
    
    nav {
        display: none;
    }
    
    .hero h1 {
        font-size: 3rem;
    }
    
    .subtitle {
        font-size: 1.2rem;
    }
    
    .section {
        padding: 4rem 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .grid, .projects-grid, .web-pricing {
        gap: 1.5rem;
    }
    
    .split-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .split-title::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .split-left, .split-right {
        text-align: center;
    }
    
    .flags {
        gap: 1rem;
    }
    
    .web-panel-content {
        padding: 1rem;
    }
    
    .price-card.featured {
        transform: scale(1);
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .card {
        padding: 1.5rem;
    }
}
/* Grid para 6 servicios (2 filas) */
.grid-2rows {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

@media (min-width: 1200px) {
    .grid-2rows {
        grid-template-columns: repeat(3, 1fr);
    }
}