/* ============================================
   3DizStudio — Main Stylesheet
   Dark Theme | Mobile-First | Inter Font
   ============================================ */

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

:root {
    --bg-primary: #0a0a0a;
    --bg-surface: #141414;
    --bg-card: #1a1a1a;
    --border: #222222;
    --text-primary: #f5f5f5;
    --text-secondary: #888888;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-glow: rgba(59, 130, 246, 0.15);
    --font: 'Inter', system-ui, -apple-system, sans-serif;
    --max-width: 1200px;
    --section-padding: 100px 24px;
    --radius: 12px;
    --transition: 0.3s ease;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 24px;
    transition: background var(--transition), backdrop-filter var(--transition);
}

.nav.scrolled {
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color var(--transition);
}

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

.nav-cta {
    background: var(--accent) !important;
    color: #fff !important;
    padding: 8px 20px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.85rem;
    transition: background var(--transition) !important;
}

.nav-cta:hover {
    background: var(--accent-hover) !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(20px);
    z-index: 999;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
}

.mobile-menu.active {
    display: flex;
}

.mobile-menu a {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
        var(--bg-primary);
    z-index: 0;
}

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

.hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -1.5px;
    margin-bottom: 24px;
}

.hero-sub {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

.hero-ctas {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
    font-family: var(--font);
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.3);
}

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

.btn-secondary:hover {
    border-color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
}

.btn-full {
    width: 100%;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.chevron {
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--text-secondary);
    border-bottom: 2px solid var(--text-secondary);
    transform: rotate(45deg);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: rotate(45deg) translateY(0); }
    50% { transform: rotate(45deg) translateY(8px); }
}

/* ============================================
   Sections (Global)
   ============================================ */
.section {
    padding: var(--section-padding);
}

.section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 60px;
    text-align: center;
}

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

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: all var(--transition);
}

.service-card:hover {
    border-color: var(--accent);
    box-shadow: 0 0 30px var(--accent-glow);
    transform: translateY(-4px);
}

.service-icon {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 20px;
    display: block;
}

.service-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.service-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   Portfolio Section
   ============================================ */
.portfolio-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-bottom: 48px;
}

.filter {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 8px 20px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-family: var(--font);
    cursor: pointer;
    transition: all var(--transition);
}

.filter:hover,
.filter.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.portfolio-item {
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition);
}

.portfolio-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.portfolio-placeholder {
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: border-color var(--transition);
}

.portfolio-item:hover .portfolio-placeholder {
    border-color: var(--accent);
}

.portfolio-placeholder span {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
}

.portfolio-cta {
    text-align: center;
    margin-top: 60px;
}

.portfolio-cta p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 20px;
}

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

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

.about-text .section-title {
    text-align: left;
    margin-bottom: 24px;
}

.about-text p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-text p:first-of-type {
    color: var(--text-primary);
    font-size: 1.15rem;
    font-weight: 500;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.stat {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ============================================
   Contact Section
   ============================================ */
.contact-sub {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-top: -40px;
    margin-bottom: 60px;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.95rem;
    transition: border-color var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

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

.contact-icon {
    font-size: 1.3rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-item strong {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 2px;
}

.contact-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.contact-social {
    display: flex;
    gap: 20px;
    margin-top: 12px;
}

.contact-social a {
    color: var(--accent);
    font-weight: 500;
    font-size: 0.9rem;
    transition: color var(--transition);
}

.contact-social a:hover {
    color: var(--accent-hover);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    padding: 60px 24px 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 40px;
    max-width: var(--max-width);
    margin: 0 auto 40px;
}

.footer-logo {
    font-size: 1.2rem;
    font-weight: 700;
    display: block;
    margin-bottom: 8px;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition);
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-contact p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    color: var(--text-secondary);
    font-size: 0.85rem;
    transition: color var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border);
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

/* ============================================
   Responsive (Tablet)
   ============================================ */
@media (max-width: 900px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

/* ============================================
   Responsive (Mobile)
   ============================================ */
@media (max-width: 640px) {
    :root {
        --section-padding: 60px 16px;
    }

    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 100px 16px 60px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-sub {
        font-size: 0.95rem;
    }

    .hero-ctas {
        flex-direction: column;
        align-items: center;
    }

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

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

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

    .stat-number {
        font-size: 1.8rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .portfolio-filters {
        gap: 6px;
    }

    .filter {
        padding: 6px 14px;
        font-size: 0.8rem;
    }
}

/* ============================================
   Animations (Scroll Fade-In)
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ============================================
   Form Success State
   ============================================ */
.form-success {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-primary);
}

.form-success h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.form-success p {
    color: var(--text-secondary);
}