/* ==========================================
   GSL PRODUCTION STUDIOS - CINEMATIC STYLESHEET
   ========================================== */

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

:root {
    /* Colors */
    --primary-black: #0A0A0A;
    --charcoal: #1A1A1A;
    --gold: #D4AF37;
    --gold-light: #F4E4B7;
    --text-primary: #F5F5F5;
    --text-secondary: #999999;
    
    /* Typography */
    --font-display: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
    --font-nav: 'Space Grotesk', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-medium: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

/* ========== NAVIGATION ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition-fast);
    padding: 1.5rem 0;
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1rem 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    transition: var(--transition-fast);
}

.logo a:hover .logo-icon {
    transform: rotate(90deg);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    font-family: var(--font-nav);
}

.nav-menu a {
    position: relative;
    padding: 0.5rem 0;
    font-weight: 500;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: width var(--transition-fast);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    width: 28px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
}

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

.hero-video-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    z-index: -2;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10,10,10,0.3) 0%, rgba(10,10,10,0.8) 100%);
    z-index: -1;
}

.hero-content {
    text-align: center;
    z-index: 1;
    max-width: 1000px;
    padding: 2rem;
    animation: fadeInUp 1.2s ease-out;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 900;
    margin-bottom: 1.5rem;
    text-shadow: 0 0 30px rgba(212, 175, 55, 0.5);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-weight: 300;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition-fast);
    cursor: pointer;
    border: none;
    font-size: 1.1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 50%, var(--gold) 100%);
    background-size: 200% 200%;
    color: var(--primary-black);
    animation: gradient 3s ease infinite;
}

.btn-primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 40px rgba(212, 175, 55, 0.4);
}

.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator svg {
    width: 32px;
    height: 32px;
    color: var(--gold);
}

/* ========== SECTIONS ========== */
.section {
    padding: 8rem 0;
    position: relative;
}

.section-dark {
    background: var(--primary-black);
}

.section-darker {
    background: linear-gradient(180deg, var(--primary-black) 0%, var(--charcoal) 100%);
}

.section-header {
    text-align: center;
    margin-bottom: 5rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 0;
    width: 80px;
    height: 4px;
    background: var(--gold);
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-top: 2rem;
}

/* ========== PROJECTS GRID ========== */
.projects-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 4rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid rgba(255, 255, 255, 0.2);
    background: transparent;
    color: var(--text-primary);
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition-fast);
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    border-color: var(--gold);
    color: var(--gold);
    background: rgba(212, 175, 55, 0.1);
}

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

.project-card {
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition-medium);
    animation: fadeInUp 0.8s ease-out;
    animation-fill-mode: both;
}

.project-card:nth-child(1) { animation-delay: 0.1s; }
.project-card:nth-child(2) { animation-delay: 0.2s; }
.project-card:nth-child(3) { animation-delay: 0.3s; }
.project-card:nth-child(4) { animation-delay: 0.4s; }

.project-card:hover {
    transform: scale(1.05) translateY(-10px);
}

.project-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: var(--transition-medium);
}

.project-card:hover .project-image {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(0,0,0,0.95) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 2rem;
    opacity: 0;
    transition: var(--transition-fast);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-category {
    color: var(--gold);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.project-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ========== ABOUT/VISION SECTION ========== */
.split-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.content-left h2 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3.5rem);
    margin-bottom: 2rem;
    position: relative;
    display: inline-block;
}

.content-left h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--gold);
}

.content-left p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.content-right img {
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    transition: var(--transition-medium);
}

.content-right img:hover {
    transform: scale(1.05);
}

/* ========== STUDIO INFO CARDS ========== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.info-card {
    background: var(--charcoal);
    padding: 3rem 2rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-fast);
}

.info-card:hover {
    border-color: rgba(212, 175, 55, 0.5);
    transform: translateY(-5px);
}

.card-icon {
    width: 60px;
    height: 60px;
    color: var(--gold);
    margin-bottom: 1.5rem;
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.card-text {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========== CONTACT FORM ========== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 1rem;
    background: var(--charcoal);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--gold);
}

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

.contact-info h3 {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--gold);
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contact-icon {
    width: 24px;
    height: 24px;
    color: var(--gold);
    flex-shrink: 0;
}

/* ========== FOOTER ========== */
.footer {
    background: var(--primary-black);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-tagline {
    color: var(--text-secondary);
    max-width: 400px;
}

.footer-links {
    display: flex;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

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

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-fast);
}

.footer-social a:hover {
    border-color: var(--gold);
    background: rgba(212, 175, 55, 0.1);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
}

/* ========== SCROLL TO TOP BUTTON ========== */
.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--gold);
    border: none;
    border-radius: 50%;
    color: var(--primary-black);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(212, 175, 55, 0.4);
}

/* ========== ANIMATIONS ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translate(-50%, 0);
    }
    50% {
        transform: translate(-50%, 15px);
    }
}

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* Fade-in observer trigger */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
    .container {
        padding: 0 1.5rem;
    }
    
    .split-section,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .projects-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: rgba(10, 10, 10, 0.98);
        flex-direction: column;
        padding: 5rem 2rem;
        transition: var(--transition-fast);
        backdrop-filter: blur(20px);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .hamburger {
        display: flex;
        z-index: 1001;
    }
    
    .section {
        padding: 5rem 0;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .btn {
        padding: 0.875rem 2rem;
        font-size: 1rem;
    }
}

/* ========== UTILITIES ========== */
.text-gold {
    color: var(--gold);
}

.text-gradient {
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }