/* 공부핏 소개·개인정보처리방침 페이지 (GitHub Pages).
   앱과 같은 톤: 다크 배경, 굵고 큰 글씨, 컬러 배너 카드. 색은 lib/design/tokens.dart와 맞춘다.
   외부 글꼴·스크립트를 불러오지 않는다(개인정보처리방침 페이지가 제3자에게 요청을 보내지 않게). */
:root {
  --bg: #0e0e12;
  --surface: #1a1a20;
  --surface-raised: #232329;
  --text: #f5f5f7;
  --text-secondary: #a0a0aa;
  --line: #2e2e36;
  --coral: #ff6b57;
  --yellow: #ffc24b;
  --blue: #5b8cff;
  --mint: #6be3b4;
  --purple: #b48cff;
  --link: #8fb0ff;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f6f8;
    --surface: #ffffff;
    --surface-raised: #ececf1;
    --text: #15151a;
    --text-secondary: #5a5a66;
    --line: #dcdce3;
    --link: #2f5fd6;
    color-scheme: light;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic",
    "Noto Sans KR", "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

a { color: var(--link); }

.wrap {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 0 16px;
}

/* 머리 */
.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  white-space: nowrap;
  gap: 10px;
  color: var(--text);
  font-weight: 800;
  font-size: 20px;
  text-decoration: none;
}

.logo {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--coral);
  color: #fff;
  font-weight: 800;
  font-size: 18px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px 14px;
}

.nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
}

.nav a:hover { color: var(--text); }

/* 소개 페이지 */
.hero { padding: 40px 0 28px; }

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(36px, 9vw, 56px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero > p {
  margin: 0;
  color: var(--text-secondary);
  font-size: clamp(17px, 4.2vw, 20px);
}

.tester-banner {
  margin: 28px 0 0;
  padding: 24px;
  border-radius: 24px;
  background:
    linear-gradient(135deg, rgba(91, 140, 255, 0.18), rgba(107, 227, 180, 0.10)),
    var(--surface);
  border: 1px solid var(--line);
}

.tester-kicker {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--mint);
  font-size: 14px;
  font-weight: 800;
}

.tester-banner h2 {
  margin: 0 0 10px;
  font-size: clamp(23px, 6vw, 30px);
  line-height: 1.3;
}

.tester-banner p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 16px;
}

.tester-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  margin-top: 18px;
  padding: 11px 20px;
  border-radius: 14px;
  background: var(--blue);
  color: #fff;
  font-weight: 800;
  text-decoration: none;
  transition: transform 0.15s ease, filter 0.15s ease;
}

.tester-cta:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

.tester-cta:focus-visible {
  outline: 3px solid var(--mint);
  outline-offset: 3px;
}

.tester-banner small {
  display: block;
  margin-top: 10px;
  color: var(--text-secondary);
  font-size: 13px;
}

.badge {
  display: inline-block;
  margin-top: 24px;
  padding: 12px 20px;
  border-radius: 999px;
  background: #000;
  color: #fff;
  font-weight: 700;
  font-size: 15px;
}

@media (prefers-color-scheme: light) {
  .badge { background: #15151a; }
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin: 32px 0;
}

.card {
  padding: 20px;
  border-radius: 20px;
  background: var(--surface);
  border-top: 6px solid var(--accent, var(--coral));
}

.card h3 {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 800;
}

.card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.6;
}

.card.premium { background: var(--surface-raised); }

.tag {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 8px;
  border-radius: 999px;
  background: var(--purple);
  color: #15151a;
  font-size: 12px;
  font-weight: 800;
  vertical-align: 2px;
}

.section-title {
  margin: 40px 0 0;
  font-size: 24px;
  font-weight: 800;
}

.note {
  margin: 8px 0 0;
  color: var(--text-secondary);
}

/* 문서(개인정보처리방침) */
.doc { padding: 16px 0 40px; }

.doc h1 {
  margin: 16px 0 4px;
  font-size: clamp(30px, 7vw, 40px);
  font-weight: 800;
  line-height: 1.2;
}

.doc .meta {
  margin: 0 0 24px;
  color: var(--text-secondary);
}

.doc h2 {
  margin: 36px 0 8px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 21px;
  font-weight: 800;
}

.doc h3 {
  margin: 20px 0 6px;
  font-size: 17px;
  font-weight: 700;
}

.doc ul { padding-left: 1.2em; }

.doc li { margin: 4px 0; }

.summary {
  margin: 0 0 8px;
  padding: 16px 18px;
  border-radius: 16px;
  background: var(--surface);
  border-left: 6px solid var(--mint);
}

/* 꼬리 */
footer {
  margin-top: 40px;
  padding: 24px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--text-secondary);
  font-size: 14px;
}

footer a { color: var(--text-secondary); }

/* 통신판매업자 표시(전자상거래법) */
footer .biz { margin: 12px 0 0; font-size: 12px; line-height: 1.7; }

@media (max-width: 520px) {
  .tester-banner { padding: 20px; }
  .tester-cta { width: 100%; }
}