/* sbto.kr — 토큰은 PRD v2 8장, 레이아웃은 PRD v2 시안(direction.css)에서 가져왔다 */
@font-face { font-family: "Pretendard"; src: url(/fonts/pretendard-400.woff2) format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Pretendard"; src: url(/fonts/pretendard-700.woff2) format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Geist"; src: url(/fonts/geist-700.woff2) format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Geist Mono"; src: url(/fonts/geist-mono-400.woff2) format("woff2"); font-weight: 400; font-display: swap; }

:root {
  --paper: #f4f5f3; --surface: #ffffff; --ink: #0f1011; --muted: #5b5f5c; --faint: #858a86;
  --line: #e1e3df; --chip: #eceeea; --blue: #2f4cff;
  --shadow: 0 1px 2px rgba(15,16,17,.04), 0 18px 40px -20px rgba(15,16,17,.18);
  --kr: "Pretendard", system-ui, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  --la: "Geist", "Pretendard", system-ui, sans-serif;
  --mono: "Geist Mono", "Pretendard", ui-monospace, Consolas, monospace;
  --ease: cubic-bezier(.2,.8,.2,1);
  /* 서비스 고유색은 서비스 타일 안에서만 쓴다. 두 테마 모두 같은 색이다 */
  --checkjarak: #0e5c4f;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0c0d0d; --surface: #161817; --ink: #eceeea; --muted: #9fa4a0; --faint: #6f7470;
    --line: #262927; --chip: #1f2220; --blue: #8096ff;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 18px 40px -20px rgba(0,0,0,.8);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body { background: var(--paper); color: var(--ink); font: 16px/1.65 var(--kr); word-break: keep-all; -webkit-font-smoothing: antialiased; } /* 한글은 어절 단위로 줄바꿈 */
a { color: inherit; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 6px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip { position: absolute; left: 16px; top: -100px; z-index: 20; padding: 12px 16px; border-radius: 12px; background: var(--ink); color: var(--paper); }
.skip:focus { top: 16px; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
@media (min-width: 768px) { .wrap { padding: 0 32px; } }
.mono { font-family: var(--mono); font-size: 13px; letter-spacing: .02em; }

/* 워드마크: 마침표는 글자가 아니라 원이다 */
.wordmark { font: 700 22px/1 var(--la); letter-spacing: -.045em; text-decoration: none; white-space: nowrap; }
.dot { display: inline-block; width: .2em; height: .2em; margin-left: .05em; border-radius: 50%; background: var(--blue); vertical-align: baseline; }

.btn { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 20px; border-radius: 999px; border: 1px solid transparent; background: var(--ink); color: var(--paper); font: 700 15px var(--kr); text-decoration: none; white-space: nowrap; cursor: pointer; }
.btn:hover { opacity: .88; }
.btn-line { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-paper { background: var(--paper); color: var(--ink); }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 36px; }

/* 내비게이션 — 화면 위에 떠 있는 알약 */
.nav-wrap { position: sticky; top: 16px; z-index: 10; padding: 16px 20px 0; }
@media (min-width: 768px) { .nav-wrap { padding: 16px 32px 0; } }
.nav { display: flex; align-items: center; gap: 8px; max-width: 1136px; margin: 0 auto; padding: 8px 8px 8px 20px; border-radius: 999px; background: var(--surface); background: color-mix(in srgb, var(--surface) 82%, transparent); border: 1px solid var(--line); backdrop-filter: blur(14px); }
.nav .wordmark { margin-right: auto; }
.nav-links { display: flex; gap: 4px; margin: 0; padding: 0; list-style: none; }
.nav-links a { display: block; padding: 10px 14px; font-size: 14px; color: var(--muted); text-decoration: none; border-radius: 999px; }
.nav-links a:hover { color: var(--ink); background: var(--chip); }
@media (max-width: 767px) { .nav-wrap { top: 8px; padding: 8px 12px 0; } .nav-links { display: none; } .nav { justify-content: space-between; } }

/* 히어로: 입장 + 첫 서비스 */
.hero { display: grid; gap: 56px; align-items: center; padding-top: 104px; padding-bottom: 88px; }
@media (min-width: 1024px) { .hero { grid-template-columns: 1.1fr 1fr; } }
@media (max-width: 767px) { .hero { gap: 40px; padding-top: 48px; padding-bottom: 56px; } }
.eyebrow { margin: 0 0 24px; color: var(--muted); }
.hero h1 { margin: 0; font: 700 clamp(40px, 5.2vw, 72px)/1.12 var(--kr); letter-spacing: -.04em; text-wrap: balance; }
.lead { margin: 28px 0 0; max-width: 30em; font-size: clamp(17px, 1.5vw, 19px); color: var(--muted); }

/* 서비스 타일: 타일 전체가 「열기」 링크다 */
.tile { position: relative; display: flex; flex-direction: column; border-radius: 28px; overflow: hidden; background: var(--checkjarak); color: #fff; }
.tile-body { padding: 32px 32px 0; }
.tile-meta { display: flex; align-items: center; gap: 10px; margin: 0; }
.tile-name { margin: 18px 0 0; font: 700 clamp(34px, 3.4vw, 46px)/1.1 var(--kr); letter-spacing: -.035em; }
.tile-link { text-decoration: none; }
.tile-link::after { content: ""; position: absolute; inset: 0; z-index: 1; border-radius: inherit; }
.tile:has(.tile-link:focus-visible) { outline: 3px solid var(--blue); outline-offset: 4px; }
.tile:has(.tile-link:focus-visible) .tile-link { outline: none; }
.tile-sub { margin: 8px 0 0; }
.tile-desc { margin: 16px 0 0; max-width: 24em; }
.chip, .chips li { display: inline-flex; align-items: center; padding: 5px 11px; border-radius: 999px; background: rgba(255,255,255,.14); font: 700 12.5px var(--kr); white-space: nowrap; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 20px 0 0; padding: 0; list-style: none; }
.tile-links { position: relative; z-index: 2; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; margin: 24px 0 0; font-size: 14px; }
.tile-links a { padding: 10px 0; text-underline-offset: 3px; }
.tile .btn-paper { background: #fff; color: var(--checkjarak); }
.tile-shot { width: min(78%, 300px); aspect-ratio: 600 / 520; margin: 32px auto 0; border: 6px solid #1b1e1d; border-bottom: 0; border-radius: 30px 30px 0 0; overflow: hidden; box-shadow: 0 24px 60px -20px rgba(0,0,0,.5); transition: transform .3s var(--ease); }
.tile-shot img { display: block; width: 100%; height: auto; }
.tile:hover .tile-shot { transform: translateY(-10px); }

/* 섹션 공통 */
section[id] { scroll-margin-top: 96px; } /* 떠 있는 내비가 앵커 대상을 가리지 않게 */
.section { padding-top: 96px; padding-bottom: 96px; }
@media (max-width: 767px) { .section { padding-top: 64px; padding-bottom: 64px; } }
.section h2 { margin: 0; font: 700 clamp(30px, 3.4vw, 44px)/1.2 var(--kr); letter-spacing: -.03em; }
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .section { animation: rise linear both; animation-timeline: view(); animation-range: entry 0% cover 28%; }
    @keyframes rise { from { transform: translateY(28px); } } /* 투명도는 건드리지 않는다: 멈춘 화면에서도 다 보인다 */
  }
}

/* 이름과 원칙 */
.name-line { margin: 0 0 56px; font: 700 clamp(36px, 0.75rem + 5.4vw, 84px)/1.05 var(--la); letter-spacing: -.045em; color: var(--faint); }
.name-line b { color: var(--ink); }
.principles { display: grid; gap: 40px; }
@media (min-width: 1024px) { .principles { grid-template-columns: 1fr 1.5fr; gap: 80px; } .principles-head { position: sticky; top: 120px; align-self: start; } }
.principles-head p { margin: 16px 0 0; font-size: 17px; color: var(--muted); max-width: 24em; }
.principles-list { margin: 0; padding: 0; list-style: none; }
.principles-list li { display: grid; grid-template-columns: 56px 1fr; gap: 0 16px; padding: 32px 0; border-top: 1px solid var(--line); }
.principles-list li:last-child { border-bottom: 1px solid var(--line); }
.principles-list li > * { grid-column: 2; }
.principles-list .num { grid-column: 1; grid-row: 1 / span 3; padding-top: 6px; color: var(--blue); }
.principles-list h3 { margin: 0; font: 700 clamp(22px, 2.2vw, 28px)/1.3 var(--kr); letter-spacing: -.02em; }
.principles-list p { margin: 10px 0 0; color: var(--muted); }
@media (max-width: 767px) { .principles-list li { grid-template-columns: 32px 1fr; gap: 0 12px; } }
.principles-list .proof { position: relative; margin-top: 16px; padding-left: 19px; font-size: 14.5px; color: var(--ink); }
.proof::before { content: ""; position: absolute; left: 0; top: .62em; width: 9px; height: 9px; border-radius: 50%; background: var(--checkjarak); }

/* 운영자의 말 */
.note { max-width: 860px; margin: 0 auto; padding: clamp(28px, 5vw, 64px); border-radius: 28px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); }
.note blockquote { margin: 0; }
.note p { margin: 0 0 18px; font-size: clamp(17px, 1.6vw, 20px); line-height: 1.8; }
.note figcaption { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; margin-top: 32px; color: var(--muted); }
.sign { font: 700 26px var(--la); letter-spacing: -.03em; color: var(--ink); }

/* 문의 — 색을 뒤집은 패널 */
.contact { border-radius: 32px; background: var(--ink); color: var(--paper); padding: clamp(32px, 6vw, 80px); }
.contact .label { margin: 0; font: 13px var(--mono); letter-spacing: .02em; color: color-mix(in srgb, var(--paper) 70%, var(--ink)); }
.contact-mail { margin: 18px 0 16px; font: 700 clamp(30px, 6.4vw, 92px)/1.05 var(--la); letter-spacing: -.045em; overflow-wrap: anywhere; }
.contact-mail a { text-decoration: none; }
.contact p:not(.contact-mail) { margin: 0; font-size: 17px; max-width: 30em; color: color-mix(in srgb, var(--paper) 78%, var(--ink)); }
.contact .btn-line { color: var(--paper); border-color: color-mix(in srgb, var(--paper) 35%, var(--ink)); }
.copy-status { font-size: 14px; }

/* 푸터 — 큰 워드마크 */
.footer { padding-top: 72px; padding-bottom: 40px; }
.big-mark { margin: 0 0 40px -.04em; font: 700 clamp(96px, 24vw, 340px)/.82 var(--la); letter-spacing: -.06em; }
.big-mark .dot { width: .17em; height: .17em; }
.foot-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px 32px; padding-top: 24px; border-top: 1px solid var(--line); font-size: 14px; }
.sig { margin: 0; }
.foot-links { display: flex; flex-wrap: wrap; gap: 20px; margin: 0; padding: 0; list-style: none; }
.foot-links a { display: inline-block; padding: 6px 0; color: var(--muted); text-decoration: none; }
.fine { margin: 16px 0 0; font-size: 13px; color: var(--muted); }

/* 404 */
.lost { padding-top: 120px; padding-bottom: 40px; }
.lost h1 { margin: 0; font: 700 clamp(32px, 4vw, 52px)/1.2 var(--kr); letter-spacing: -.03em; }
.lost p { margin: 16px 0 0; color: var(--muted); }

@media (prefers-reduced-motion: reduce) { .tile-shot { transition: none; } .tile:hover .tile-shot { transform: none; } }