/* UAPT 홍보 홈페이지 스타일.
   색은 :root 토큰으로 두고, 다크 모드에서는 같은 이름의 값만 바꾼다. */
:root {
  --bg: #ffffff;
  --bg-alt: #f5f7fb;
  --text: #1c2233;
  --muted: #5b6478;
  --brand: #2456d6;
  --brand-strong: #1a43aa;
  --line: #e2e6ef;
  --radius: 12px;
  --max: 1040px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1420;
    --bg-alt: #161d2c;
    --text: #e8ecf5;
    --muted: #9aa4b8;
    --brand: #6f98ff;
    --brand-strong: #8fb0ff;
    --line: #26304a;
  }
}

:root[data-theme="dark"] {
  --bg: #0f1420;
  --bg-alt: #161d2c;
  --text: #e8ecf5;
  --muted: #9aa4b8;
  --brand: #6f98ff;
  --brand-strong: #8fb0ff;
  --line: #26304a;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "Pretendard", "Noto Sans KR", "Malgun Gothic", system-ui, sans-serif;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}
a { color: var(--brand); }
img { max-width: 100%; height: auto; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }

/* 상단 바 */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: var(--bg); border-bottom: 1px solid var(--line);
}
.bar { display: flex; align-items: center; justify-content: space-between; min-height: 56px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: 0.04em; color: var(--text); text-decoration: none; }
.brand__logo { display: block; width: auto; height: 26px; }
.nav { display: flex; gap: 16px; flex-wrap: wrap; }
.nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
.nav a:hover { color: var(--text); }

/* 첫 화면 */
.hero { padding: 72px 0 56px; background: var(--bg-alt); }
.eyebrow { margin: 0 0 8px; color: var(--brand); font-weight: 700; letter-spacing: 0.08em; font-size: 0.9rem; }
.hero h1 { margin: 0 0 16px; font-size: clamp(1.8rem, 4vw, 2.6rem); line-height: 1.25; }
.lead { margin: 0 0 28px; color: var(--muted); font-size: 1.05rem; max-width: 640px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-block; padding: 12px 20px; border-radius: 999px;
  text-decoration: none; font-weight: 700; font-size: 0.98rem; border: 1px solid transparent;
}
.btn.primary { background: var(--brand); color: #fff; }
.btn.primary:hover { background: var(--brand-strong); }
.btn.ghost { border-color: var(--line); color: var(--text); background: transparent; }

/* 본문 구역 */
.section { padding: 64px 0; }
.section.alt { background: var(--bg-alt); }
.section h2 { margin: 0 0 8px; font-size: clamp(1.4rem, 3vw, 1.8rem); }
.sub { margin: 0 0 28px; color: var(--muted); }

.cards { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.card h3 { margin: 0 0 8px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); }

.card .patent { margin-top: 10px; font-size: 0.85rem; color: var(--muted); }
.note { margin: 20px 0 0; color: var(--muted); font-size: 0.95rem; }
.hero__grid { display: grid; gap: 32px; align-items: center; }
@media (min-width: 800px) { .hero__grid { grid-template-columns: 1.1fr 1fr; } }
.hero__media, .feature__media { margin: 0; }
.hero__media img, .feature__media img { display: block; width: 100%; height: auto; border-radius: var(--radius); border: 1px solid var(--line); }
.feature__media { margin: 0 0 20px; }
.group-title { margin: 28px 0 14px; font-size: 1.15rem; color: var(--brand); }

.card__label { margin: 0 0 6px; color: var(--brand); font-size: 0.85rem; font-weight: 700; }
.card__status { margin: 14px 0 0; display: inline-block; padding: 4px 10px; border-radius: 999px; background: var(--bg-alt); color: var(--muted); font-size: 0.85rem; }
.split-note { display: grid; gap: 28px; }
@media (min-width: 800px) { .split-note { grid-template-columns: 1fr 1fr; } }
.split-note h2 { margin-top: 0; }
.nav .btn { padding: 8px 14px; font-size: 0.9rem; }
.group-title:first-of-type { margin-top: 0; }

.list { margin: 0; padding-left: 20px; }
.list li { margin: 6px 0; }

.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.steps li { display: flex; gap: 14px; align-items: center; background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 20px; }
.steps span {
  flex: 0 0 auto; width: 34px; height: 34px; border-radius: 50%;
  background: var(--brand); color: #fff; font-weight: 800;
  display: inline-flex; align-items: center; justify-content: center;
}
.steps p { margin: 0; }

.contact-line { margin: 0; font-size: 1.05rem; }

/* 하단 */
.site-footer { border-top: 1px solid var(--line); padding: 28px 0; color: var(--muted); font-size: 0.92rem; }
.site-footer p { margin: 4px 0; }
.small { font-size: 0.85rem; }

/* 휴대폰 화면 */
@media (max-width: 600px) {
  .hero { padding: 48px 0 40px; }
  .nav { gap: 12px; }
  .nav a { font-size: 0.88rem; }
}

/* 헤더 메뉴를 세로 가운데로 맞춘다 */
.site-header .bar { min-height: 64px; }
.nav { align-items: center; line-height: 1; }
.nav > a, .nav > .btn { display: inline-flex; align-items: center; }
.nav .btn { line-height: 1.2; }

/* 상단 바: faceok 로고(태그라인 포함)와 UAPT 글자를 키우고, 메뉴는 오른쪽·세로 가운데 */
.site-header .bar { min-height: 72px; }
.brand { gap: 14px; }
.brand__logo { height: 38px; }
.brand__name { font-size: 1.25rem; font-weight: 800; letter-spacing: 0.02em; }
.nav { gap: 18px; }
.nav .btn { padding: 10px 18px; }
@media (max-width: 600px) {
  .site-header .bar { min-height: 60px; }
  .brand__logo { height: 30px; }
  .brand__name { font-size: 1.05rem; }
}

/* 로그인 안내: 왼쪽 소개 패널 + 오른쪽 본문 (넓은 화면), 휴대폰은 위아래로 쌓음 */
.login-split { display: grid; grid-template-columns: 1fr; }
.login-panel { background: linear-gradient(160deg, #0f1f3d 0%, #13305c 100%); color: #e8eefc; padding: 40px 32px; }
.login-panel img { display: block; height: 44px; width: auto; }
.login-panel .tagline { color: #8fb0ff; font-size: 0.9rem; margin: 12px 0 28px; }
.login-panel ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }
.login-panel li { position: relative; padding-left: 18px; line-height: 1.6; font-size: 0.97rem; }
.login-panel li::before { content: ""; position: absolute; left: 0; top: 0.6em; width: 7px; height: 7px; border-radius: 50%; background: #8fb0ff; }
.login-main { min-width: 0; }
@media (min-width: 900px) {
  .login-split { grid-template-columns: minmax(320px, 420px) 1fr; min-height: calc(100vh - 72px); }
}