@charset "UTF-8";

/* ---------- 1. Global Variables & Reset ---------- */
:root {
    /* Color Palette */
    --color-bg: #030303;
    --color-surface: #0f0f0f;
    --color-surface-hover: #1a1a1a;
    --color-accent: #00ff66;
    --color-accent-glow: rgba(0, 255, 102, 0.2);
    --color-text: #ffffff;
    --color-text-muted: #888888;
    --color-border: rgba(255, 255, 255, 0.08);
    
    /* Typography */
    --font-head: 'Inter', 'Noto Sans KR', sans-serif;
    --font-body: 'Inter', 'Noto Sans KR', sans-serif;
    
    /* Layout & Transitions */
    --container-width: 1280px;
    --transition-fast: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
    scroll-behavior: smooth;
    background-color: var(--color-bg);
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    word-break: keep-all;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul {
    list-style: none;
}

/* Light Theme */
body.light-theme {
    --color-bg: #ffffff;
    --color-surface: #f0f0f0;
    --color-surface-hover: #e0e0e0;
    --color-text: #111111;
    --color-text-muted: #666666;
    --color-border: rgba(0, 0, 0, 0.1);
    --color-accent: #00aa44;
    --color-accent-glow: rgba(0, 170, 68, 0.2);
}
body.light-theme .navbar {
    background: rgba(255, 255, 255, 0.8);
}
body.light-theme .btn-primary {
    --color-accent: #00aa44 !important;
    color: var(--color-accent) !important;
    border-color: var(--color-accent) !important;
}
body.light-theme .dark-section {
    background: #f9f9f9;
}
body.light-theme .hero-title .outline-text {
    -webkit-text-stroke: 1.5px rgba(0, 0, 0, 0.8);
}
body.light-theme .work-info {
    background: linear-gradient(to top, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.5) 50%, transparent 100%);
}
body.light-theme .bg-glow {
    opacity: 0.1;
}

/* ---------- 2. Abstract Background Effects ---------- */
.bg-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(150px);
    z-index: -1;
    pointer-events: none;
    opacity: 0.4;
    animation: float 20s infinite alternate;
}

.glow-1 {
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(0,255,102,0.15) 0%, rgba(0,0,0,0) 70%);
    top: -20%;
    left: -10%;
}

.glow-2 {
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(0,153,255,0.1) 0%, rgba(0,0,0,0) 70%);
    bottom: -10%;
    right: -10%;
    animation-delay: -5s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(5%, 5%) scale(1.1); }
}

/* ---------- 3. Typography & Utility ---------- */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 8rem 0;
    position: relative;
}

.section-title {
    font-family: var(--font-head);
    font-size: 3.5rem;
    font-weight: 800;
    text-transform: uppercase;
    margin-bottom: 4rem;
    letter-spacing: -1px;
}

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

/* Scroll Animations */
.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* ---------- 4. Buttons ---------- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: transparent;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
    font-family: var(--font-head);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-accent);
    z-index: -1;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-fast);
}

.btn-primary:hover {
    color: var(--color-bg);
    box-shadow: 0 0 20px var(--color-accent-glow);
}

.btn-primary:hover::before {
    transform: scaleX(1);
    transform-origin: left;
}

.massive-btn {
    font-size: 1.125rem;
    padding: 1.25rem 3rem;
}

/* ---------- 5. Navigation ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 90px;
    z-index: 1000;
    background: rgba(3, 3, 3, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition-fast);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo {
    font-family: var(--font-head);
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -1px;
}

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

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    transition: color var(--transition-fast);
}

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

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

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

.nav-btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.85rem;
}

/* ---------- 6. Hero Section ---------- */
.hero-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 90px;
    position: relative;
}

.hero-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-title {
    font-family: var(--font-head);
    font-size: clamp(3.5rem, 8vw, 7rem);
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.03em;
    margin-bottom: 2rem;
}

.outline-text {
    color: transparent;
    -webkit-text-stroke: 1.5px rgba(255, 255, 255, 0.8);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin-bottom: 3rem;
    font-weight: 300;
}

/* Marquee */
.marquee-container {
    width: 100%;
    overflow: hidden;
    background: var(--color-accent);
    color: var(--color-bg);
    padding: 1rem 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.marquee-track {
    display: flex;
    width: fit-content;
    animation: marquee 20s linear infinite;
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: 2px;
}

.marquee-track span {
    padding-right: 2rem;
    white-space: nowrap;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-33.333%); }
}

/* ---------- 7. Services Section ---------- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 3rem 2rem;
    border-radius: 12px;
    position: relative;
    transition: var(--transition-fast);
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--color-accent);
    box-shadow: 0 10px 30px var(--color-accent-glow);
}

.card-icon {
    font-family: var(--font-head);
    font-size: 4rem;
    font-weight: 800;
    color: transparent;
    -webkit-text-stroke: 1px var(--color-border);
    margin-bottom: 2rem;
    transition: var(--transition-fast);
}

.service-card:hover .card-icon {
    -webkit-text-stroke: 1px var(--color-accent);
    color: rgba(0, 255, 102, 0.1);
}

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

.card-desc {
    color: var(--color-text-muted);
    font-size: 1rem;
    margin-bottom: 2rem;
}

.card-line {
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-slow);
}

.service-card:hover .card-line {
    width: 100%;
}

/* ---------- 8. Engine Section (WASM) ---------- */
.engine-section {
    padding: 4rem 0;
}

.engine-box {
    background: #090909;
    border: 1px solid #222;
    border-radius: 8px;
    font-family: 'Courier New', Courier, monospace;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

.engine-header {
    background: #111;
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid #222;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--color-accent);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { opacity: 1; box-shadow: 0 0 10px var(--color-accent); }
    50% { opacity: 0.4; box-shadow: 0 0 2px var(--color-accent); }
    100% { opacity: 1; box-shadow: 0 0 10px var(--color-accent); }
}

.engine-body {
    padding: 2rem;
    color: #a0a0a0;
    line-height: 1.8;
}

.highlight {
    color: #fff;
    font-weight: bold;
}

.neon-text {
    color: var(--color-accent);
    text-shadow: 0 0 5px rgba(0, 255, 102, 0.5);
    transition: color 0.3s;
}

/* ---------- 9. Works Section ---------- */
.dark-section {
    background: #000000;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.works-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

.work-item {
    position: relative;
    cursor: pointer;
    border-radius: 8px;
    overflow: hidden;
}

.work-image {
    width: 100%;
    height: 350px;
    background-size: cover;
    background-position: center;
    background-color: var(--color-surface);
    transition: transform 0.8s cubic-bezier(0.2, 1, 0.3, 1), filter 0.8s;
    filter: grayscale(0%) contrast(1);
}

.work-item:hover .work-image {
    transform: scale(1.05);
    filter: brightness(1.1);
}

/* Temporary placeholders for works */
.placeholder-1 { background-image: linear-gradient(45deg, #1a1a1a, #0a0a0a); }
.placeholder-2 { background-image: linear-gradient(135deg, #111, #222); }
.placeholder-3 { background-image: linear-gradient(to top, #0f0f0f, #1f1f1f); }
.placeholder-4 { background-image: linear-gradient(to right, #111, #0a0a0a); }

.work-info {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 2rem;
    background: linear-gradient(to top, rgba(0,0,0,0.95) 0%, rgba(0,0,0,0.5) 50%, transparent 100%);
    transform: translateY(0);
    opacity: 1;
    transition: padding var(--transition-fast);
}

.work-item:hover .work-info {
    padding-bottom: 2.5rem;
}

.work-info h3 {
    font-family: var(--font-head);
    font-size: 1.75rem;
    margin-bottom: 0.25rem;
}

.work-info span {
    color: var(--color-accent);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ---------- 10. Contact Section ---------- */
.form-container {
    max-width: 800px;
    margin: 0 auto;
}

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

.contact-header p {
    color: var(--color-text-muted);
    font-size: 1.125rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.input-group {
    position: relative;
    width: 100%;
}

.input-group input,
.input-group textarea {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 1.125rem;
    transition: border-color var(--transition-fast);
    resize: none;
    outline: none;
}

.input-group label {
    position: absolute;
    left: 0;
    top: 1rem;
    color: var(--color-text-muted);
    font-size: 1.125rem;
    pointer-events: none;
    transition: var(--transition-fast);
}

/* Floating Label Magic */
.input-group input:focus,
.input-group textarea:focus,
.input-group input:not(:placeholder-shown),
.input-group textarea:not(:placeholder-shown) {
    border-bottom-color: var(--color-accent);
}

.input-group input:focus + label,
.input-group textarea:focus + label,
.input-group input:not(:placeholder-shown) + label,
.input-group textarea:not(:placeholder-shown) + label {
    top: -1rem;
    font-size: 0.85rem;
    color: var(--color-accent);
}

.submit-btn {
    align-self: flex-start;
    margin-top: 1rem;
    padding: 1.25rem 3rem;
}

/* ---------- 11. Footer ---------- */
.site-footer {
    background: var(--color-surface);
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4rem;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-brand h2 {
    font-family: var(--font-head);
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

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

.footer-brand p {
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 1.5rem;
    justify-content: flex-end;
    max-width: 550px;
}

.footer-links a {
    color: var(--color-text-muted);
    font-weight: 500;
    transition: var(--transition-fast);
    white-space: nowrap;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    color: #555;
    font-size: 0.85rem;
}

/* ---------- 12. Scroll to Top Button ---------- */
.scroll-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--color-accent);
    color: var(--color-bg);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 4px 15px var(--color-accent-glow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-fast);
    z-index: 999;
}

.scroll-top-btn.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top-btn:hover {
    background-color: var(--color-text);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.3);
}

/* ---------- 13. Media Queries ---------- */
@media screen and (max-width: 992px) {
    .hero-title {
        font-size: clamp(3rem, 6vw, 5rem);
    }
    
    .works-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (max-width: 768px) {
    .works-grid {
        grid-template-columns: 1fr;
    }

    .nav-links {
        display: none;
    }
    
    .section {
        padding: 5rem 0;
    }
    
    .section-title {
        font-size: 2.5rem;
        margin-bottom: 3rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
        max-width: 100%;
        gap: 1rem;
    }
}

@media screen and (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .work-image {
        height: 250px;
    }
}
```