:root {
    --bg-color: #0d0d0d;
    --surface-color: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent: #ffffff;
    --border: rgba(255, 255, 255, 0.1);
    --transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

.serif {
    font-family: 'Noto Serif KR', serif;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.container.narrow {
    max-width: 900px;
}

/* Typography */
.title-lg {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

.title-xl {
    font-size: 5rem;
    margin-bottom: 2rem;
    line-height: 1.1;
}

.text-lg {
    font-size: 1.25rem;
}

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

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

.mb-6 {
    margin-bottom: 1.5rem;
}

.mb-8 {
    margin-bottom: 2rem;
}

.mb-12 {
    margin-bottom: 3rem;
}

.mb-16 {
    margin-bottom: 4rem;
}

/* Buttons */
.btn-primary {
    background: #fff;
    color: #000;
    padding: 1rem 2.5rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.btn-primary.lg {
    padding: 1.25rem 4rem;
    font-size: 1.1rem;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.1);
}

.btn-outline-white {
    border: 1px solid #fff;
    color: #fff;
    padding: 1rem 2.5rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn-outline {
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 0.5rem 1.5rem;
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.btn-outline:hover {
    background: #fff;
    color: #000;
    border-color: #fff;
}

/* Navbar */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 2rem 0;
    transition: var(--transition);
}

#navbar.scrolled {
    padding: 1rem 0;
    background: rgba(13, 13, 13, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

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

.logo {
    height: 80px;
    padding: 5px 0;
}

.logo img {
    height: 100%;
    width: auto;
    display: block;
    aspect-ratio: 1/1;
}

.footer-brand .logo {
    height: 120px;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    transition: var(--transition);
}

.nav-links a:hover {
    color: #fff;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
}

/* Hero */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
}

.hero-bg .overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 40%, var(--bg-color));
}

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

.hero h1 {
    font-size: 6rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 3rem;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

/* Base Layout */
.section {
    padding: 10rem 0;
}

.bg-surface {
    background-color: var(--surface-color);
}

.border-top {
    border-top: 1px solid var(--border);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4rem;
    align-items: center;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.flex-between {
    display: flex;
    justify-content: space-between;
}

.items-end {
    align-items: flex-end;
}

/* About Items */
blockquote {
    font-size: 1.5rem;
    border-left: 2px solid #fff;
    padding-left: 2rem;
    margin-top: 2rem;
    color: #fff;
}

.stat-box {
    background: var(--surface-color);
    padding: 4rem;
    border: 1px solid var(--border);
}

.stat-item:first-child {
    margin-bottom: 3rem;
}

.stat-num {
    font-size: 4rem;
    display: block;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.2em;
}

/* Service Cards */
.service-card {
    padding: 3rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.service-card:hover {
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-5px);
}

.card-num {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    border: 1px solid var(--border);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Work Cards */
.work-card {
    cursor: pointer;
}

.work-img {
    aspect-ratio: 3/4;
    overflow: hidden;
    position: relative;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
}

.work-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.work-card:hover img {
    transform: scale(1.05);
}

.work-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

.work-overlay span {
    border: 1px solid #fff;
    padding: 0.6rem 1.5rem;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.work-cat {
    display: block;
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    letter-spacing: 0.1em;
}

.work-author {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.platform-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: linear-gradient(135deg, #228be6, #1971c2);
    color: #fff;
    padding: 0.4rem 0.75rem;
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    z-index: 10;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.work-card h3 {
    font-size: 1.1rem;
    line-height: 1.4;
    margin: 0;
}

/* Submission Info */
.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: 2rem;
}

.submission-info {
    background: var(--surface-color);
    padding: 5rem;
    margin-bottom: 4rem;
}

.info-title {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.list-dots {
    list-style: none;
}

.list-dots li::before {
    content: "— ";
    color: #555;
}

.list-dots li {
    margin-bottom: 0.8rem;
}

.email-link {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.guide-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

/* Footer */
footer {
    padding: 8rem 0 4rem;
    border-top: 1px solid var(--border);
    background: var(--surface-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 4rem;
    margin-bottom: 6rem;
}

.footer-brand {
    max-width: 400px;
}

.footer-links {
    display: flex;
    gap: 6rem;
}

.link-group h5 {
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.link-group a {
    display: block;
    text-decoration: none;
    color: var(--text-primary);
    margin-bottom: 0.8rem;
    font-size: 0.9rem;
    transition: var(--transition);
}

.link-group a:hover {
    color: var(--text-secondary);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 3rem;
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    text-transform: uppercase;
    color: #555;
    letter-spacing: 0.1em;
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s, transform 1s;
}

.reveal-delay-1 {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s 0.2s, transform 1s 0.2s;
}

.reveal-delay-2 {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s 0.4s, transform 1s 0.4s;
}

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

/* Responsive */
@media (max-width: 768px) {
    .title-xl {
        font-size: 3rem;
    }

    .hero h1 {
        font-size: 3.5rem;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .submission-info {
        padding: 2rem;
    }

    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .footer-content {
        flex-direction: column;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 4rem;
    }
}

/* Modal System */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: var(--surface-color);
    width: 100%;
    max-width: 400px;
    padding: 3.5rem 2.5rem;
    position: relative;
    border: 1px solid var(--border);
    transform: translateY(20px);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    text-align: center;
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    transition: var(--transition);
}

.modal-close:hover {
    color: #fff;
    transform: rotate(90deg);
}

.modal-title {
    margin-bottom: 2.5rem;
}

.modal-title h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

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

.social-btns {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.btn-social {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem;
    font-weight: 600;
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
}

.btn-kakao {
    background: #FEE500;
    color: #000;
}

.btn-kakao:hover {
    background: #fada00;
    transform: translateY(-2px);
}

.btn-google {
    background: #fff;
    color: #3c4043;
    border: 1px solid #dadce0;
}

.btn-google:hover {
    background: #f8f9fa;
    transform: translateY(-2px);
}