/* ===== Brand Colors ===== */
:root {
    --color-black: #1a1a1a;
    /* 본문, 버튼, 아이콘 */
    --color-dark: #404040;
    /* 네비게이션, 서브텍스트 */
    --color-gray: #727171;
    /* 헤딩, 강조 회색 */
    --color-muted: #a3a3a3;
    /* 보조 텍스트 */
    --color-light: #f5f5f5;
    /* 밝은 배경 */
    --color-border: #000000;
    /* 구분선 */
    --color-white: #ffffff;
    /* 흰색 배경 */
}

/* Color Utility - Text */
.text-black {
    color: var(--color-black);
}

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

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

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

/* Color Utility - Background */
.bg-black {
    background-color: var(--color-black);
}

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

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

/* Color Utility - Border */
.border-main {
    border-color: var(--color-border);
}

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

body {
    font-family: 'NanumSquare', 'Inter', 'Noto Sans KR', sans-serif;
    background-color: var(--color-white);
    color: var(--color-black);
    overflow-x: hidden;
}

.wrapper {
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
}

/* Reveal Animation */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

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

/* Social Icon */
.social-icon {
    width: 36px;
    height: 36px;
    border: 1px solid var(--color-black);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s, color 0.3s;
    font-size: 12px;
}

.social-icon:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

/* Button Outline */
.btn-outline {
    display: inline-block;
    border: 1px solid var(--color-black);
    padding: 10px 24px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: all 0.3s;
    text-decoration: none;
    color: var(--color-black);
}

.btn-outline:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

/* Project Card */
.project-card img {
    transition: transform 0.5s ease;
}

.project-card:hover img {
    transform: scale(1.03);
}

/* Client Logo */
.client-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-dark);
    white-space: nowrap;
}

/* Navigation Link */
.nav-link {
    font-family: 'NanumSquare', sans-serif;
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-dark);
    text-decoration: none;
    position: relative;
    padding-bottom: 4px;
    transition: color 0.3s;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-black);
    transition: width 0.3s;
}

.nav-link:hover {
    color: var(--color-black);
}

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

/* Navigation Icon */
.nav-icon {
    width: 32px;
    height: 32px;
    background-color: var(--color-black);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s;
}

.nav-icon:hover {
    background-color: var(--color-dark);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-white);
    z-index: 50;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0;
}

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

.mobile-menu nav {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 28px;
    margin-bottom: 40px;
}

.mobile-menu nav a {
    font-family: 'NanumSquare', sans-serif;
    font-size: 24px;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--color-black);
    text-decoration: none;
    transition: opacity 0.3s;
}

.mobile-menu nav a:hover {
    opacity: 0.5;
}

.mobile-menu-social {
    display: flex;
    gap: 12px;
}

.mobile-menu-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    font-size: 32px;
    cursor: pointer;
    color: var(--color-black);
    transition: opacity 0.3s;
}

.mobile-menu-close:hover {
    opacity: 0.5;
}

/* Service Cell */
.service-cell {
    padding: 32px 40px;
}

/* Footer Link */
.footer-link {
    display: block;
    font-size: 13px;
    color: var(--color-dark);
    text-decoration: none;
    margin-bottom: 10px;
    transition: color 0.2s;
}

.footer-link:hover {
    color: var(--color-black);
}

/* Image Section */
.img-section {
    width: 100%;
    height: 400px;
    overflow: hidden;
    position: relative;
}

.img-section img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}