/* 텍스트뷰어 소개 사이트 — 앱 아이콘과 같은 남색·파랑 계열 */

:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --text: #1c1c22;
  --text-2: #5b5f6e;
  --line: #e3e6ef;
  --brand: #4338ca;
  --brand-2: #2f80ed;
  --brand-soft: #eceafe;
  --hero-text: #ffffff;
  --shadow: 0 10px 30px rgba(30, 27, 107, 0.12);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111218;
    --surface: #1b1d26;
    --text: #eceef4;
    --text-2: #a3a8b8;
    --line: #2c2f3b;
    --brand: #8b93ff;
    --brand-2: #6ea8ff;
    --brand-soft: #262a48;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Pretendard", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo",
               "Noto Sans KR", "Malgun Gothic", sans-serif;
  font-size: 17px;
  line-height: 1.7;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

a { color: var(--brand); text-underline-offset: 3px; }

.wrap {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ── 첫 화면 ─────────────────────────────────────────── */

.hero {
  color: var(--hero-text);
  background:
    radial-gradient(900px 500px at 15% 0%, rgba(255, 255, 255, 0.14), transparent 60%),
    linear-gradient(135deg, #4338ca 0%, #3b5bdb 55%, #2f80ed 100%);
  padding: 72px 0 88px;
  text-align: center;
}

.hero .icon {
  width: 128px;
  height: 128px;
  border-radius: 29px;           /* iOS 아이콘 모서리 비율 */
  box-shadow: 0 18px 40px rgba(11, 11, 59, 0.35);
}

.hero h1 {
  margin: 24px 0 4px;
  font-size: clamp(34px, 6vw, 48px);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.hero .lead {
  margin: 0;
  font-size: clamp(18px, 3vw, 22px);
  font-weight: 600;
  opacity: 0.95;
}

.hero .sub {
  max-width: 560px;
  margin: 16px auto 0;
  opacity: 0.88;
}

.badge {
  display: inline-block;
  margin-top: 28px;
  padding: 8px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.35);
  font-size: 15px;
  font-weight: 600;
}

/* ── 앱 화면 ─────────────────────────────────────────── */

.shots {
  margin-top: -48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: start;
}

.shots figure { margin: 0; text-align: center; }

.shots img {
  display: block;
  width: 100%;
  max-width: 280px;
  height: auto;
  margin: 0 auto;
  border-radius: 34px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: var(--surface);
}

.shots figcaption {
  margin-top: 12px;
  font-size: 15px;
  color: var(--text-2);
}

/* 좁은 화면: 가로로 넘겨 보기 (페이지 전체는 가로로 밀리지 않는다) */
@media (max-width: 720px) {
  .shots {
    grid-template-columns: none;
    grid-auto-flow: column;
    grid-auto-columns: 62%;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding: 0 20px 8px;
    margin-left: -20px;
    margin-right: -20px;
    scrollbar-width: none;
  }
  .shots::-webkit-scrollbar { display: none; }
  .shots figure { scroll-snap-align: center; }
}

/* ── 본문 섹션 ───────────────────────────────────────── */

section { padding: 72px 0 0; }

h2 {
  margin: 0 0 24px;
  font-size: clamp(24px, 4vw, 30px);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px 22px 20px;
}

.card h3 {
  margin: 0 0 6px;
  font-size: 18px;
  line-height: 1.4;
}

.card p { margin: 0; color: var(--text-2); font-size: 16px; }

.tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
}

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
  display: grid;
  gap: 12px;
}

.steps li {
  counter-increment: step;
  position: relative;
  padding: 16px 18px 16px 58px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 18px;
  top: 16px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  line-height: 26px;
  text-align: center;
}

@media (prefers-color-scheme: dark) {
  .steps li::before { color: #111218; }
}

.steps b { display: block; }
.steps span { color: var(--text-2); font-size: 16px; }

/* ── 바닥글 ─────────────────────────────────────────── */

footer {
  margin-top: 88px;
  padding: 28px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--text-2);
  font-size: 15px;
}

footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
}

footer .spacer { flex: 1; }

/* ── 개인정보 처리방침 (문서형) ────────────────────── */

.doc-top {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.doc-top .wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.doc-top img { width: 36px; height: 36px; border-radius: 8px; }
.doc-top a { color: var(--text); text-decoration: none; font-weight: 700; }

.doc {
  max-width: 760px;
  padding-top: 48px;
}

.doc h1 {
  margin: 0 0 8px;
  font-size: clamp(28px, 5vw, 36px);
  line-height: 1.3;
}

.doc .meta { margin: 0 0 32px; color: var(--text-2); font-size: 15px; }

.doc .summary {
  margin: 0 0 40px;
  padding: 18px 20px;
  border-radius: 14px;
  background: var(--brand-soft);
  font-weight: 600;
}

.doc h2 {
  margin: 44px 0 12px;
  font-size: 21px;
}

.doc p, .doc li { color: var(--text); }
.doc ul { padding-left: 1.2em; }
.doc li { margin: 6px 0; }

.doc table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 15px;
  display: block;
  overflow-x: auto;
}

.doc th, .doc td {
  padding: 10px 12px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.doc th { background: var(--surface); white-space: nowrap; }