/* DayStock 마케팅 사이트
 *
 * 색·치수는 실제 Flutter 앱에서 그대로 가져왔다(1차 근거:
 * DayStock/lib/core/design_system/app_theme.dart 의 AppColors + DayStock/DESIGN_SYSTEM.md).
 * 스크린샷 눈대중이 아니다. 앱 토큰이 바뀌면 이 :root 도 같이 갱신한다.
 *
 * 모티프는 하나 — 호재가 체결될 때만 계단으로 오르는 선. 다른 은유(촛대·원형 차트·화살표
 * 아이콘)는 섞지 않는다.
 *
 * 다크 고정이다. 앱이 다크 한 벌뿐이고, 사이트가 라이트로 뒤집히면 상승 레드가 시세판이
 * 아니라 경고색으로 읽힌다.
 */

:root {
  color-scheme: dark;

  /* AppColors */
  --bg: #17171c;
  --card: #202027;
  --card-high: #2a2a33;
  --line: #2e2e38;
  --ink: #ffffff;
  --ink-muted: #b0b8c1;
  --ink-faint: #8b95a1;
  --rise: #f04452;
  --rise-soft: rgba(240, 68, 82, 0.14);
  --fall: #3182f6;
  --on-rise: #ffffff;

  --sans: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard",
    "Malgun Gothic", "Noto Sans KR", system-ui, sans-serif;

  /* AppRadius 9/13/16/22 */
  --radius-sm: 9px;
  --radius: 13px;
  --radius-lg: 16px;
  --radius-xl: 22px;

  --wrap: 960px;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-inline: 20px;
}

a { color: inherit; }
img { max-width: 100%; }

/* 숫자는 앱과 같이 자리를 맞춘다 */
.tnum { font-variant-numeric: tabular-nums; }

/* ── 헤더 ─────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(23, 23, 28, 0.86);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 60px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.brand img { width: 26px; height: 26px; border-radius: 7px; }
.site-nav {
  margin-left: auto;
  display: flex;
  gap: 18px;
  font-size: 14px;
  color: var(--ink-muted);
  flex-wrap: wrap;
}
.site-nav a { text-decoration: none; }
.site-nav a:hover { color: var(--ink); }

/* ── 히어로 ───────────────────────────────────── */
.hero { padding-block: 72px 56px; }
.badge {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--rise);
  background: var(--rise-soft);
  border-radius: 999px;
  padding: 5px 11px;
  letter-spacing: 0;
}
.hero h1 {
  margin: 18px 0 0;
  font-size: clamp(30px, 5.4vw, 48px);
  line-height: 1.18;
  letter-spacing: -0.035em;
  font-weight: 800;
  text-wrap: balance;
}
.lead {
  margin: 14px 0 0;
  max-width: 62ch;
  color: var(--ink-muted);
  font-size: 17px;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: var(--radius-lg);
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  border: 1px solid transparent;
}
.btn-primary { background: var(--rise); color: var(--on-rise); }
.btn-secondary { background: var(--card); color: var(--ink); border-color: var(--line); }
.btn:hover { filter: brightness(1.08); }

/* 히어로 차트 — 앱 홈의 계단 선을 그대로 쓴다 */
.cover-stage {
  margin-top: 40px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: 22px 22px 16px;
}
.cover-stage .quote {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}
.cover-stage .price {
  font-size: clamp(30px, 6vw, 40px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
}
.cover-stage .chg { color: var(--rise); font-weight: 700; }
.cover-stage .mark {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 5px;
  background: var(--rise);
  color: var(--on-rise);
  font-weight: 800;
  font-size: 13px;
}
.cover-stage svg { display: block; width: 100%; height: auto; margin-top: 14px; }
.cover-stage .axis {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--ink-faint);
}

/* ── 섹션 공통 ────────────────────────────────── */
section { padding-block: 44px; }
section h2 {
  margin: 0;
  font-size: clamp(22px, 3.4vw, 28px);
  letter-spacing: -0.03em;
  font-weight: 800;
}
.section-lead {
  margin: 10px 0 0;
  color: var(--ink-muted);
  max-width: 62ch;
}

/* 세 걸음 */
.loop {
  list-style: none;
  counter-reset: step;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.loop-step {
  counter-increment: step;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px;
}
.loop-step::before {
  content: counter(step);
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: var(--card-high);
  color: var(--rise);
  font-weight: 800;
  font-size: 13px;
  margin-bottom: 10px;
}
.loop-step h3 { margin: 0 0 4px; font-size: 16px; font-weight: 700; }
.loop-step p { margin: 0; color: var(--ink-muted); font-size: 14.5px; }

/* 기능 카드 */
.feature-grid {
  margin-top: 26px;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.feature-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px;
}
.feature-card h3 { margin: 0 0 6px; font-size: 17px; font-weight: 700; letter-spacing: -0.02em; }
.feature-card p { margin: 0; color: var(--ink-muted); font-size: 14.5px; }

/* 원칙 — 하지 않는 것 */
.principles {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.principle {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  background: var(--bg);
}
.principle b { display: block; font-size: 15px; }
.principle span { color: var(--ink-faint); font-size: 14px; }
.zero { color: var(--fall); font-weight: 800; }

/* 표 */
.table-wrap { overflow-x: auto; margin-top: 18px; }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 420px; }
th, td { text-align: left; padding: 11px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--ink-faint); font-weight: 600; font-size: 13px; }

/* ── 지원 페이지 ──────────────────────────────── */
.faq-list { margin-top: 24px; display: grid; gap: 10px; }
.faq-list details {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 4px 18px;
}
.faq-list summary {
  cursor: pointer;
  padding: 14px 0;
  font-weight: 700;
  font-size: 15.5px;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: " +"; color: var(--rise); }
.faq-list details[open] summary::after { content: " −"; }
.faq-list p { margin: 0 0 16px; color: var(--ink-muted); font-size: 14.5px; }

.contact-card {
  margin-top: 26px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.support-form { display: grid; gap: 14px; margin-top: 18px; }
.support-form label { display: grid; gap: 6px; font-size: 14px; color: var(--ink-muted); }
.support-form select,
.support-form input,
.support-form textarea {
  font: inherit;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 12px 13px;
  width: 100%;
}
.support-form textarea { resize: vertical; }
.support-form :focus-visible { outline: 2px solid var(--rise); outline-offset: 1px; }
.support-form button {
  font: inherit;
  font-weight: 700;
  min-height: 48px;
  border: 0;
  border-radius: var(--radius-lg);
  background: var(--rise);
  color: var(--on-rise);
  cursor: pointer;
}
.support-form button[disabled] { opacity: 0.6; cursor: default; }
.form-note { color: var(--ink-faint); font-size: 13.5px; margin: 0; }
#form-status { font-size: 14px; min-height: 1.4em; margin: 0; }

/* ── 방침 페이지 ──────────────────────────────── */
.breadcrumb { font-size: 13.5px; color: var(--ink-faint); padding-top: 26px; }
.breadcrumb a { text-decoration: none; }
.policy { padding-block: 10px 40px; max-width: 76ch; }
.policy h1 { font-size: clamp(26px, 4.4vw, 34px); letter-spacing: -0.03em; margin-bottom: 6px; }
.policy h2 {
  margin-top: 34px;
  font-size: 19px;
  letter-spacing: -0.02em;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.policy p, .policy li { color: var(--ink-muted); }
.policy ul { padding-left: 20px; }
.policy li { margin-bottom: 6px; }
.meta { color: var(--ink-faint); font-size: 14px; }
.callout {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--rise);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-top: 18px;
}
.callout p { margin: 0; color: var(--ink); font-size: 14.5px; }

/* ── 푸터 ─────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 40px;
  padding-block: 28px 44px;
  color: var(--ink-faint);
  font-size: 13.5px;
}
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 18px; align-items: center; }
.site-footer a { text-decoration: none; }
.site-footer .spacer { margin-left: auto; }