/* ============================================
   탄베이오첸 - Main Stylesheet (Redesign)
   Editorial / Minimal approach
   ============================================ */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable.min.css');

:root {
    --black: #1a1a1a;
    --dark: #333;
    --mid: #666;
    --light: #999;
    --border: #e0e0e0;
    --bg: #fafafa;
    --white: #fff;
    --accent: #2563EB;
    --font: 'Pretendard Variable', 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
    --header-h: 60px;
}

body {
    font-family: var(--font);
    color: var(--dark);
    background: var(--white);
    font-size: 16px;
    line-height: 1.7;
    overflow-x: hidden;
}

/* ── Layout ── */
.wrap {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 28px;
}

/* ============================================
   HEADER — editorial split nav
   ============================================ */
.gnb {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-h);
    background: var(--white);
    z-index: 100;
    border-bottom: 1px solid var(--border);
}

.gnb .wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.gnb-logo {
    display: flex;
    align-items: center;
}

.gnb-logo img {
    height: 36px;
    width: auto;
    object-fit: contain;
}

.gnb-nav {
    display: flex;
    align-items: center;
    gap: 0;
}

.gnb-nav a {
    position: relative;
    font-size: 13px;
    font-weight: 500;
    color: var(--mid);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0 18px;
    line-height: var(--header-h);
    transition: color .2s;
}

.gnb-nav a:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 14px;
    background: var(--border);
}

.gnb-nav a:hover,
.gnb-nav a.on {
    color: var(--black);
}

.gnb-nav a.on::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 18px;
    right: 18px;
    height: 2px;
    background: var(--black);
}

/* mobile toggle */
.gnb-open {
    display: none;
    font-size: 13px;
    font-weight: 600;
    color: var(--dark);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
    padding: 6px 0;
}

/* mobile overlay */
.m-nav {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--white);
    z-index: 200;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0;
}

.m-nav.open {
    display: flex;
}

.m-nav a {
    font-size: 22px;
    font-weight: 600;
    color: var(--dark);
    padding: 18px 0;
    letter-spacing: -0.01em;
    transition: color .2s;
}

.m-nav a:hover,
.m-nav a.on {
    color: var(--black);
}

.m-nav-close {
    position: absolute;
    top: 18px;
    right: 28px;
    font-size: 14px;
    font-weight: 600;
    color: var(--mid);
    cursor: pointer;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

/* ============================================
   HERO
   ============================================ */
.hero {
    padding: 160px 0 120px;
    border-bottom: 1px solid var(--border);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-inner {
    max-width: 100%;
}

.hero h1 {
    font-size: 42px;
    font-weight: 700;
    line-height: 1.35;
    color: var(--black);
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.hero p {
    font-size: 17px;
    color: var(--mid);
    line-height: 1.8;
    margin-bottom: 40px;
}

.hero-links {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-img {
    border-radius: 12px;
    overflow: hidden;
}

.hero-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform .4s ease;
}

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

.link-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--black);
    border: 1px solid var(--black);
    padding: 12px 24px;
    transition: background .2s, color .2s;
}

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

.link-btn.fill {
    background: var(--black);
    color: var(--white);
}

.link-btn.fill:hover {
    background: var(--dark);
}

/* ============================================
   SECTION — generic
   ============================================ */
.sec {
    padding: 96px 0;
    border-bottom: 1px solid var(--border);
}

.sec:last-of-type {
    border-bottom: none;
}

.sec-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--light);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.sec-title {
    font-size: 30px;
    font-weight: 700;
    color: var(--black);
    line-height: 1.3;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}

.sec-desc {
    font-size: 16px;
    color: var(--mid);
    line-height: 1.8;
    max-width: 600px;
    margin-bottom: 48px;
}

/* ============================================
   SERVICES — horizontal row list
   ============================================ */
.svc-grid {
    display: flex;
    flex-direction: column;
    margin-top: 40px;
}

.svc-item {
    display: grid;
    grid-template-columns: 60px 1fr;
    gap: 8px;
    align-items: start;
    padding: 32px 0;
    border-top: 1px solid var(--border);
    transition: all .25s ease;
}

.svc-item:last-child {
    border-bottom: 1px solid var(--border);
}

.svc-item:hover {
    background: var(--bg);
    padding-left: 20px;
    margin-left: -20px;
    margin-right: -20px;
    padding-right: 20px;
    border-left: 3px solid var(--black);
}

.svc-num {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: #ccc;
    padding-top: 1px;
    letter-spacing: -0.02em;
}

.svc-item h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 6px;
    letter-spacing: -0.01em;
}

.svc-item p {
    font-size: 14px;
    color: var(--mid);
    line-height: 1.7;
}

/* ============================================
   ABOUT
   ============================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

.about-text {
    font-size: 16px;
    color: var(--dark);
    line-height: 1.9;
    margin-bottom: 40px;
}

.values {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.val-item {
    padding-left: 20px;
    border-left: 2px solid var(--border);
}

.val-item h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 4px;
}

.val-item p {
    font-size: 14px;
    color: var(--mid);
    line-height: 1.6;
}

.about-img {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.about-img .ph {
    font-size: 13px;
    color: var(--light);
}

/* ============================================
   PROCESS
   ============================================ */
.proc-list {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0;
    counter-reset: step;
}

.proc-item {
    padding: 24px 20px;
    border-left: 1px solid var(--border);
    counter-increment: step;
}

.proc-item:first-child {
    border-left: none;
    padding-left: 0;
}

.proc-item::before {
    content: '0' counter(step);
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: #ccc;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.proc-item h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 6px;
}

.proc-item p {
    font-size: 13px;
    color: var(--mid);
    line-height: 1.5;
}

/* ============================================
   DETAIL SERVICES (tabs)
   ============================================ */
.detail-sec {
    background: var(--bg);
}

.tab-nav {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 48px;
}

.tab-nav button {
    font-size: 14px;
    font-weight: 500;
    color: var(--light);
    padding: 14px 24px;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    cursor: pointer;
    transition: color .2s, border-color .2s;
    background: none;
}

.tab-nav button:hover {
    color: var(--dark);
}

.tab-nav button.on {
    color: var(--black);
    font-weight: 600;
    border-bottom-color: var(--black);
}

.tab-body {
    display: none;
}

.tab-body.on {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
    animation: fadeUp .3s ease;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tab-body h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 12px;
}

.tab-body>div>p {
    font-size: 15px;
    color: var(--mid);
    line-height: 1.8;
    margin-bottom: 28px;
}

.tab-body h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 12px;
}

.feat-list {
    margin-bottom: 24px;
}

.feat-list li {
    font-size: 14px;
    color: var(--mid);
    padding: 6px 0;
    padding-left: 16px;
    position: relative;
}

.feat-list li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--light);
}

.tab-img {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 12px;
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.tab-img .ph {
    font-size: 13px;
    color: var(--light);
}

/* ============================================
   SECURITY
   ============================================ */
.sec-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    border-top: 1px solid var(--border);
}

.sec-card {
    padding: 32px 20px;
    border-bottom: 1px solid var(--border);
    border-right: 1px solid var(--border);
}

.sec-card:nth-child(4n) {
    border-right: none;
}

.sec-card h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 6px;
}

.sec-card p {
    font-size: 13px;
    color: var(--mid);
    line-height: 1.6;
}

/* ============================================
   CONTACT
   ============================================ */
.contact-inner {
    text-align: center;
    max-width: 520px;
    margin: 0 auto;
}

.contact-inner p {
    margin-bottom: 32px;
}

.naver-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: #03C75A;
    color: var(--white);
    font-size: 15px;
    font-weight: 600;
    padding: 14px 36px;
    border-radius: 4px;
    transition: opacity .2s;
    margin-bottom: 48px;
}

.naver-btn:hover {
    opacity: .85;
}

.naver-btn svg {
    display: inline;
    width: 18px;
    height: 18px;
}

.contact-row {
    display: flex;
    justify-content: center;
    gap: 48px;
    text-align: left;
    flex-wrap: wrap;
}

.contact-row dt {
    font-size: 12px;
    font-weight: 600;
    color: var(--light);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 4px;
}

.contact-row dd {
    font-size: 14px;
    color: var(--dark);
    line-height: 1.6;
}

.contact-row dd a {
    color: var(--dark);
    transition: color .2s;
}

.contact-row dd a:hover {
    color: var(--accent);
}

.contact-row .sub {
    font-size: 12px;
    color: var(--light);
    margin-top: 2px;
}

/* ============================================
   FOOTER — thin single line
   ============================================ */
.ft {
    border-top: 1px solid var(--border);
    padding: 16px 0;
}

.ft .wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.ft-left {
    font-size: 12px;
    color: var(--light);
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.ft-left span::after {
    content: '·';
    margin-left: 16px;
    color: var(--border);
}

.ft-left span:last-child::after {
    display: none;
}

.ft-right {
    font-size: 12px;
    color: var(--light);
}

/* ============================================
   PAGE TOP SPACER
   ============================================ */
.page-top {
    padding-top: calc(var(--header-h) + 60px);
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border);
}

.page-top h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--black);
    letter-spacing: -0.02em;
}

.page-top p {
    font-size: 15px;
    color: var(--mid);
    margin-top: 8px;
}

/* ============================================
   UTILITIES
   ============================================ */
.mt-60 {
    margin-top: 60px;
}

.mb-60 {
    margin-bottom: 60px;
}

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