/* ===== CSS Variables ===== */
:root {
    --color-primary: #000000;
    --color-secondary: #1a1a1a;
    --color-accent: #4F46E5;
    --color-accent-light: #6366F1;
    --color-text: #1a1a1a;
    --color-text-light: #6b7280;
    --color-text-muted: #9ca3af;
    --color-bg: #ffffff;
    --color-bg-alt: #f9fafb;
    --color-bg-dark: #111111;
    --color-border: #e5e7eb;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;
    
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1);
    
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background: var(--color-secondary);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-alt);
}

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

.btn-white:hover {
    background: var(--color-bg-alt);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-full {
    width: 100%;
}

/* ===== Navigation ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem var(--spacing-md);
}

.logo {
    display: flex;
    flex-direction: column;
    line-height: 1;
}

.logo-hey {
    font-size: 1.25rem;
    font-weight: 300;
    color: #c0c0c0;
}

.logo-casa {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.mobile-menu-btn {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

.nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    gap: var(--spacing-sm);
}

.nav-links.active {
    display: flex;
}

.nav-links a {
    padding: 0.75rem 0;
    font-weight: 500;
    color: var(--color-text);
    transition: var(--transition);
}

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

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 8rem var(--spacing-md) var(--spacing-2xl);
    background: linear-gradient(135deg, #f5f5f5 0%, #ffffff 100%);
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    margin-bottom: var(--spacing-md);
}

.hero-title-small {
    display: block;
    font-size: clamp(1.5rem, 5vw, 2rem);
    font-weight: 400;
    color: var(--color-text-light);
}

.hero-title-big {
    display: block;
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    max-width: 500px;
}

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

.hero-visual {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-2xl);
}

.hero-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: float 3s ease-in-out infinite;
}

.hero-card:nth-child(2) { animation-delay: 0.5s; }
.hero-card:nth-child(3) { animation-delay: 1s; }

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

.hero-card-icon {
    font-size: 1.5rem;
}

.hero-card-text {
    display: flex;
    flex-direction: column;
}

.hero-card-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.hero-card-status {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
}

/* ===== Section Headers ===== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-tag {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Services Section ===== */
.services {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg);
}

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

.service-card {
    background: var(--color-bg-alt);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

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

.service-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.service-card p {
    color: var(--color-text-light);
    font-size: 0.9375rem;
}

/* ===== Portfolio Section ===== */
.portfolio {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-alt);
}

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

.portfolio-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg-dark);
}

.video-placeholder {
    aspect-ratio: 16/9;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    color: white;
}

.video-placeholder-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    transition: var(--transition);
}

.portfolio-item:hover .video-placeholder-icon {
    background: var(--color-accent);
    transform: scale(1.1);
}

.video-placeholder-text {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.portfolio-info {
    padding: var(--spacing-md);
    background: white;
}

.portfolio-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.portfolio-info h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.portfolio-info p {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

/* ===== About Section ===== */
.about {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
}

.about-content p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.about-content p strong {
    color: var(--color-primary);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.about-image-placeholder {
    aspect-ratio: 4/3;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    color: var(--color-text-muted);
}

.about-image-placeholder span {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

/* ===== CTA Section ===== */
.cta {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
}

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

.cta h2 {
    font-size: clamp(1.5rem, 5vw, 2.25rem);
    margin-bottom: var(--spacing-sm);
}

.cta p {
    color: rgba(255,255,255,0.8);
    margin-bottom: var(--spacing-lg);
}

/* ===== Contact Section ===== */
.contact {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-alt);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
}

.contact-details {
    margin-top: var(--spacing-lg);
}

.contact-item {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

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

.contact-item strong {
    display: block;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.contact-item p {
    color: var(--color-text-light);
    margin: 0;
}

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

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

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    font-family: inherit;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-group textarea {
    resize: vertical;
}

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

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

.footer-brand p {
    color: var(--color-text-muted);
    margin-top: var(--spacing-sm);
}

.footer-brand .logo-hey {
    color: #666;
}

.footer-brand .logo-casa {
    color: white;
}

.footer h4 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-links a {
    color: var(--color-text-muted);
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    font-size: 1.5rem;
    transition: var(--transition);
}

.social-links a:hover {
    transform: scale(1.2);
}

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

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

/* ===== Responsive - Tablet ===== */
@media (min-width: 640px) {
    .hero-cta {
        flex-direction: row;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .portfolio-item-large {
        grid-column: span 2;
    }
    
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ===== Responsive - Desktop ===== */
@media (min-width: 1024px) {
    .mobile-menu-btn {
        display: none;
    }
    
    .nav-links {
        display: flex;
        flex-direction: row;
        position: static;
        background: none;
        padding: 0;
        border: none;
        align-items: center;
        gap: var(--spacing-lg);
    }
    
    .nav-links a {
        padding: 0;
    }
    
    .hero {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        padding: 0 var(--spacing-2xl);
    }
    
    .hero-content {
        flex: 1;
    }
    
    .hero-visual {
        flex: 1;
        justify-content: flex-end;
        margin-top: 0;
        flex-direction: column;
        align-items: flex-end;
    }
    
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .about-grid {
        grid-template-columns: 1fr 1fr;
        align-items: center;
    }
    
    .contact-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* ===== Animations ===== */
@media (prefers-reduced-motion: no-preference) {
    .service-card,
    .portfolio-item,
    .btn {
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
}