/* ============================================
   S2 Studio | Stylesheet
   Dark. Bold. Distinctive.
   ============================================ */

/* --- VARIABLES --- */
:root {
    --bg: #060609;
    --bg-card: #0E0E14;
    --bg-elevated: #181822;
    --bg-surface: #1A1A26;

    --accent: #CDFF00;
    --accent-hover: #DBFF4A;
    --accent-dim: rgba(205, 255, 0, 0.06);
    --accent-glow: rgba(205, 255, 0, 0.12);

    --text: #F0EDE8;
    --text-secondary: #7A7880;
    --text-dim: #3C3A44;

    --border: #1C1C28;
    --border-hover: #2C2C3A;

    --font-display: 'Exo 2', sans-serif;
    --font-body: 'Albert Sans', sans-serif;

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 3rem;
    --space-xl: 6rem;

    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
    --radius: 12px;
    --radius-lg: 20px;
}


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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

::selection {
    background: var(--accent);
    color: var(--bg);
}


/* --- CONTAINER --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}


/* --- GRAIN TEXTURE --- */
.grain {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    pointer-events: none;
    z-index: 10000;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}


/* --- GLOW ORBS --- */
.glow {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    filter: blur(120px);
    z-index: 0;
}

.glow-1 {
    top: -250px;
    right: -150px;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(205, 255, 0, 0.05) 0%, transparent 70%);
    animation: glowDrift 22s ease-in-out infinite;
}

.glow-2 {
    bottom: -300px;
    left: -200px;
    width: 550px;
    height: 550px;
    background: radial-gradient(circle, rgba(120, 80, 255, 0.04) 0%, transparent 70%);
    animation: glowDrift 28s ease-in-out infinite reverse;
}

@keyframes glowDrift {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -20px) scale(1.05); }
    66% { transform: translate(-20px, 30px) scale(0.95); }
}


/* --- NAVIGATION --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-sm) 0;
    transition: background 0.4s, backdrop-filter 0.4s, border-color 0.4s;
    border-bottom: 1px solid transparent;
}

.nav.scrolled {
    background: rgba(6, 6, 9, 0.88);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom-color: var(--border);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
}

.logo {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.6rem;
    letter-spacing: -0.03em;
    position: relative;
    z-index: 1001;
}

.logo-sup {
    font-size: 0.55em;
    color: var(--accent);
    vertical-align: super;
    margin-left: 1px;
    font-weight: 800;
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
}

.nav-links a {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.25s;
    letter-spacing: 0.01em;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width 0.3s var(--ease);
}

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

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

.nav-right {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    position: relative;
    z-index: 1001;
}


/* --- LANGUAGE SWITCHER --- */
.lang-switcher {
    display: flex;
    gap: 2px;
    background: var(--bg-card);
    border-radius: 10px;
    padding: 3px;
    border: 1px solid var(--border);
}

.lang-btn {
    background: none;
    border: none;
    color: var(--text-dim);
    font-family: var(--font-body);
    font-size: 0.72rem;
    font-weight: 600;
    padding: 6px 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.25s var(--ease);
    letter-spacing: 0.06em;
}

.lang-btn.active {
    background: var(--accent);
    color: var(--bg);
}

.lang-btn:hover:not(.active) {
    color: var(--text-secondary);
}


/* --- HAMBURGER --- */
.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    flex-direction: column;
    gap: 5px;
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.35s var(--ease);
    transform-origin: center;
}

.hamburger.open span:first-child {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.hamburger.open span:last-child {
    transform: rotate(-45deg) translate(5px, -5px);
}


/* --- HERO --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 160px 0 120px;
}

.hero-content {
    max-width: 860px;
}

.hero-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    padding: 10px 20px;
    border: 1px solid rgba(205, 255, 0, 0.18);
    border-radius: 100px;
    margin-bottom: var(--space-lg);
    opacity: 0;
    animation: fadeInUp 0.9s var(--ease) 0.1s forwards;
}

.hero-title {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(3.2rem, 9vw, 7rem);
    line-height: 1.02;
    letter-spacing: -0.035em;
    margin-bottom: var(--space-md);
}

.hero-line {
    display: block;
    opacity: 0;
    animation: fadeInUp 0.9s var(--ease) forwards;
}

.hero-line:nth-child(1) {
    animation-delay: 0.2s;
}

.hero-line:nth-child(2) {
    animation-delay: 0.38s;
}

.hero-line.accent {
    color: var(--accent);
    text-shadow: 0 0 80px rgba(205, 255, 0, 0.15);
}

.hero-sub {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 580px;
    line-height: 1.75;
    margin-bottom: var(--space-lg);
    font-weight: 400;
    opacity: 0;
    animation: fadeInUp 0.9s var(--ease) 0.55s forwards;
}

.hero-cta {
    display: flex;
    gap: var(--space-sm);
    opacity: 0;
    animation: fadeInUp 0.9s var(--ease) 0.7s forwards;
}


/* --- BUTTONS --- */
.btn {
    font-family: var(--font-body);
    font-size: 0.92rem;
    font-weight: 600;
    padding: 15px 34px;
    border-radius: 100px;
    border: none;
    cursor: pointer;
    transition: all 0.3s var(--ease);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.01em;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(205, 255, 0, 0.2);
}

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

.btn-secondary:hover {
    border-color: var(--text-secondary);
    transform: translateY(-3px);
    background: rgba(255, 255, 255, 0.03);
}


/* --- SCROLL INDICATOR --- */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    animation: fadeIn 1s var(--ease) 1.2s forwards;
}

.scroll-line {
    width: 1px;
    height: 56px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    animation: scrollPulse 2.2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.2; transform: scaleY(0.5); transform-origin: top; }
    50% { opacity: 0.8; transform: scaleY(1); transform-origin: top; }
}


/* --- TECH MARQUEE --- */
.marquee-section {
    padding: var(--space-md) 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    overflow: hidden;
    position: relative;
    z-index: 1;
}

.marquee {
    overflow: hidden;
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
    display: flex;
    gap: var(--space-md);
    white-space: nowrap;
    animation: marqueeScroll 40s linear infinite;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-dim);
    width: max-content;
}

.marquee-track span {
    flex-shrink: 0;
}

.marquee-track .dot {
    color: var(--accent);
    opacity: 0.5;
}

@keyframes marqueeScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}


/* --- SECTIONS --- */
section {
    padding: clamp(80px, 12vw, 160px) 0;
    position: relative;
    z-index: 1;
}

.section-header {
    margin-bottom: var(--space-xl);
}

.section-label {
    display: block;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: var(--space-xs);
}

.section-title {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    letter-spacing: -0.025em;
}


/* --- SERVICES GRID --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.service-item {
    background: var(--bg);
    padding: clamp(28px, 4vw, 48px);
    transition: background 0.4s;
}

.service-item:hover {
    background: var(--bg-card);
}

.service-num {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.82rem;
    color: var(--accent);
    display: block;
    margin-bottom: var(--space-sm);
    letter-spacing: 0.05em;
}

.service-item h3 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.3rem;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.service-item p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.65;
    font-weight: 400;
}


/* --- PORTFOLIO GRID --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.project-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all 0.4s var(--ease);
}

.project-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow:
        0 24px 60px rgba(0, 0, 0, 0.5),
        0 0 50px var(--accent-dim);
}

.project-image {
    aspect-ratio: 16 / 10;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.project-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.1);
    transition: opacity 0.4s;
}

.project-card:hover .project-image::after {
    opacity: 0;
}

/* Project gradient placeholders */
.grad-1 { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.grad-2 { background: linear-gradient(135deg, #f5af19 0%, #f12711 100%); }
.grad-3 { background: linear-gradient(135deg, #0cebeb 0%, #20e3b2 60%, #29ffc6 100%); }
.grad-4 { background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); }
.grad-5 { background: linear-gradient(135deg, #fa709a 0%, #fee140 100%); }
.grad-6 { background: linear-gradient(135deg, #a18cd1 0%, #fbc2eb 100%); }

.project-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    opacity: 0.8;
    position: relative;
    z-index: 1;
    transition: transform 0.4s var(--ease);
}

.project-card:hover .project-placeholder {
    transform: scale(1.05);
}

.placeholder-icon {
    font-size: 3rem;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
}

.placeholder-text {
    font-size: 0.72rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.55);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.project-info {
    padding: var(--space-md) var(--space-md) calc(var(--space-md) + 4px);
}

.project-tag {
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 8px;
    display: block;
}

.project-name {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.35rem;
    margin-bottom: 6px;
    letter-spacing: -0.01em;
}

.project-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.55;
    font-weight: 400;
}


/* --- ABOUT --- */
.about-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-xl);
    align-items: start;
}

.about-text p {
    font-size: 1.12rem;
    line-height: 1.85;
    color: var(--text-secondary);
    font-weight: 400;
}

.about-text strong {
    color: var(--text);
    font-weight: 600;
}

.founders {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.founder-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    transition: all 0.3s var(--ease);
}

.founder-card:hover {
    border-color: var(--border-hover);
    transform: translateX(4px);
}

.founder-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.founder-avatar.a {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.founder-avatar.r {
    background: var(--accent);
    color: var(--bg);
}

.founder-name {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 2px;
}

.founder-title {
    font-size: 0.82rem;
    color: var(--text-secondary);
    font-weight: 400;
}


/* --- PROCESS --- */
.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.process-step {
    background: var(--bg);
    padding: clamp(32px, 3vw, 52px) clamp(20px, 2vw, 32px);
    text-align: center;
    transition: all 0.4s var(--ease);
    position: relative;
}

.process-step::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(205, 255, 0, 0.06) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.4s var(--ease);
}

.process-step:hover {
    background: var(--bg-elevated);
}

.process-step:hover::before {
    opacity: 1;
}

.process-num {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    color: var(--accent);
    opacity: 0.5;
    margin-bottom: var(--space-sm);
    line-height: 1;
    transition: all 0.4s var(--ease);
    position: relative;
}

.process-step:hover .process-num {
    opacity: 1;
    transform: scale(1.1);
    text-shadow: 0 0 30px rgba(205, 255, 0, 0.4);
}

.process-step h3 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
    transition: color 0.4s;
    position: relative;
}

.process-step:hover h3 {
    color: var(--accent);
}

.process-step p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.55;
    font-weight: 400;
    position: relative;
    transition: color 0.4s;
}

.process-step:hover p {
    color: var(--text);
}


/* --- CTA SECTION --- */
.cta-section {
    background: var(--accent);
    padding: clamp(70px, 10vw, 130px) 0;
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-section h2 {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(2.2rem, 5vw, 4rem);
    color: var(--bg);
    letter-spacing: -0.03em;
    margin-bottom: 6px;
}

.cta-sub {
    font-size: clamp(1rem, 2.5vw, 1.35rem);
    color: rgba(6, 6, 9, 0.5);
    margin-bottom: var(--space-lg);
    font-weight: 500;
}

.cta-email {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--bg);
    position: relative;
    display: inline-block;
}

.cta-email::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 100%;
    height: 2px;
    background: rgba(6, 6, 9, 0.25);
    transition: background 0.3s;
}

.cta-email:hover::after {
    background: var(--bg);
}


/* --- FOOTER --- */
.footer {
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--border);
    position: relative;
    z-index: 1;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-logo {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.2rem;
}

.footer-copy {
    font-size: 0.78rem;
    color: var(--text-dim);
    font-weight: 400;
}

.footer-links {
    display: flex;
    gap: var(--space-md);
}

.footer-links a {
    font-size: 0.82rem;
    color: var(--text-secondary);
    transition: color 0.25s;
    font-weight: 400;
}

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


/* --- ANIMATIONS --- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(28px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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


/* --- SCROLL REVEAL --- */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}


/* --- RESPONSIVE: TABLET --- */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .about-content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}


/* --- RESPONSIVE: MOBILE --- */
@media (max-width: 768px) {
    :root {
        --space-lg: 2rem;
        --space-xl: 4rem;
    }

    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(6, 6, 9, 0.97);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: var(--space-lg);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.35s var(--ease);
        z-index: 999;
    }

    .nav-links.open {
        opacity: 1;
        pointer-events: all;
    }

    .nav-links a {
        font-family: var(--font-display);
        font-size: 1.8rem;
        font-weight: 700;
        color: var(--text);
    }

    .nav-links a::after {
        display: none;
    }

    .hero {
        padding: 140px 0 100px;
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        justify-content: center;
        width: 100%;
    }

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

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

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

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

    .footer-inner {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .scroll-indicator {
        display: none;
    }
}


/* --- RESPONSIVE: SMALL --- */
@media (max-width: 480px) {
    .hero-title {
        font-size: clamp(2.4rem, 12vw, 3.5rem);
    }

    .lang-switcher {
        gap: 1px;
    }

    .lang-btn {
        padding: 5px 8px;
        font-size: 0.68rem;
    }
}