/* SeaChart V4 공개 랜딩 (RESULT_V4_PUBLIC_LANDING_P3 → RESULT_240DA hero 이미지 교체).
   글꼴·기본 토큰은 app.css(SeaChart Sans · --info/--primary) 를 그대로 쓰고, 여기서는 body.landing 범위만 정의한다.
   hero = 제공 이미지 1장(바다·선박·세계지도·연결선) + 왼쪽 가독성 overlay + 문구 → 밝은 기능 섹션 → 볼 수 있는 정보 → 마지막 CTA.
   외부 자원 없음. 애니메이션 없음(hover 전환만). */
body.landing {
  --lp-navy: #071d38; --lp-ink: #f2f7fc; --lp-ink2: #c4d4e6; --lp-ink3: #8ea6c1; --lp-line: rgba(196, 212, 230, .2);
  --lp-accent: #5ccbe8; --lp-blue: #1f86cf;
  --lp-max: 1240px; --lp-gut: 32px; --lp-nav-h: 84px; --lp-radius: 8px;
  --lp-head: #0f1b2b; --lp-text: #4a5869;
  background: #fff; color: var(--lp-text); font-size: 1rem; line-height: 1.6;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
.landing h1, .landing h2, .landing h3 { letter-spacing: -.02em; word-break: keep-all; margin: 0; }
.landing p, .landing li { word-break: keep-all; }
.landing section[id], .landing [id="about"], .landing [id="features"] { scroll-margin-top: calc(var(--lp-nav-h) + 8px); }
.lp-wrap { max-width: var(--lp-max); margin: 0 auto; padding: 0 var(--lp-gut); }
.lp-skip { position: absolute; left: -999px; top: 8px; z-index: 50; background: #fff; color: var(--primary-ink); padding: 8px 12px; border-radius: 6px; }
.lp-skip:focus { left: 8px; }

/* ── nav ── */
.lp-nav { position: fixed; inset: 0 0 auto; z-index: 20; height: var(--lp-nav-h); transition: background .25s, box-shadow .25s; }
.lp-nav.is-solid { background: rgba(7, 29, 56, .9); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); box-shadow: 0 1px 0 var(--lp-line); }
.lp-navin { height: 100%; display: flex; align-items: center; gap: 56px; }
.lp-brand { display: flex; align-items: center; flex-shrink: 0; }
.lp-brand img { height: 52px; width: auto; display: block; }
.lp-links { display: flex; gap: 40px; }
.lp-links a { color: var(--lp-ink2); text-decoration: none; font-size: 1.0625rem; font-weight: 500; transition: color .15s; }
.lp-links a:hover, .lp-links a:focus-visible { color: #fff; }
.lp-navact { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.lp-menu { display: none; width: 42px; height: 42px; border: 1px solid var(--lp-line); border-radius: 8px; background: transparent; cursor: pointer;
  flex-direction: column; justify-content: center; align-items: center; gap: 4px; padding: 0; }
.lp-menu span { display: block; width: 18px; height: 2px; background: var(--lp-ink); border-radius: 1px; transition: transform .2s, opacity .2s; }
.lp-menu[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.lp-menu[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.lp-menu[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ── buttons ── */
.lp-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 28px; border-radius: var(--lp-radius);
  font-weight: 700; font-size: 1rem; text-decoration: none; white-space: nowrap; border: 1px solid transparent;
  transition: background .15s, border-color .15s, box-shadow .15s; }
.lp-btn:focus-visible { outline: 2px solid var(--lp-accent); outline-offset: 3px; }
.lp-btn-primary { background: linear-gradient(135deg, #4cc3e8 0%, #2a8ee0 100%); color: #fff; box-shadow: 0 8px 22px -8px rgba(57, 175, 209, .7); }
.lp-btn-primary:hover { background: linear-gradient(135deg, #5dcdef 0%, #3498e6 100%); }
.lp-btn-ghost { background: rgba(7, 29, 56, .3); border-color: rgba(242, 247, 252, .45); color: var(--lp-ink); }
.lp-btn-ghost:hover { border-color: rgba(242, 247, 252, .8); background: rgba(7, 29, 56, .5); }
.lp-btn-nav { min-height: 42px; padding: 0 22px; font-size: 1rem; background: rgba(7, 29, 56, .25); border-color: rgba(242, 247, 252, .5); color: #fff; }
.lp-btn-nav:hover { border-color: #fff; }

/* ── hero: 하나의 정적 장면 ── */
.lp-hero { position: relative; isolation: isolate; overflow: hidden; color: var(--lp-ink); background: #0a2a4c;
  min-height: max(640px, min(100svh, 860px)); display: flex; align-items: center; padding: var(--lp-nav-h) 0 48px; }
/* 배경 이미지: cover. 선박(이미지 x≈74%)이 오른쪽에 남도록 가로 기준점을 오른쪽으로 */
.lp-bg { position: absolute; inset: 0; z-index: -5; }
.lp-bg-img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: 62% 50%; }
/* 문구 가독성: 왼쪽만 짙은 남색, 가운데부터는 이미지 원색. 위(nav)·아래 가장자리는 아주 약하게 */
.lp-shade { position: absolute; inset: 0; z-index: -4; pointer-events: none;
  background:
    linear-gradient(90deg, rgba(5, 22, 44, .86) 0%, rgba(5, 22, 44, .7) 26%, rgba(5, 22, 44, .3) 46%, rgba(5, 22, 44, 0) 62%),
    linear-gradient(180deg, rgba(5, 22, 44, .45) 0%, rgba(5, 22, 44, 0) 18%, rgba(5, 22, 44, 0) 85%, rgba(5, 22, 44, .25) 100%); }
.lp-herogrid { position: relative; width: 100%; }
.lp-copy { max-width: 600px; position: relative; z-index: 2; }
.lp-eyebrow { display: inline-flex; margin: 0 0 22px; padding: 6px 14px; border-radius: 999px; border: 1px solid rgba(196, 226, 255, .45);
  background: rgba(7, 29, 56, .35); color: var(--lp-ink); font-size: .875rem; font-weight: 500; }
.lp-hero h1 { color: #fff; font-size: clamp(2.375rem, 1.2rem + 2.9vw, 4rem); font-weight: 700; line-height: 1.16; margin-bottom: 22px; }
.lp-hero h1 span { white-space: nowrap; }
.lp-hero h1 em { font-style: normal; background: linear-gradient(90deg, #5ccbe8, #3aa3e0); -webkit-background-clip: text; background-clip: text; color: transparent; letter-spacing: .01em; }
.lp-lead { color: var(--lp-ink2); font-size: clamp(1.0625rem, 1rem + .3vw, 1.25rem); line-height: 1.7; margin: 0 0 32px; max-width: 32em; }
.lp-cta { display: flex; flex-wrap: wrap; gap: 12px; }
/* 기능 띠(숫자 KPI 대신 기능 이름) */
.lp-caps { list-style: none; margin: 40px 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, auto); justify-content: start; }
.lp-caps li { padding: 2px 22px; border-left: 1px solid var(--lp-line); display: flex; flex-direction: column; gap: 4px; }
.lp-caps li:first-child { padding-left: 0; border-left: 0; }
.lp-caps strong { color: #fff; font-size: 1rem; font-weight: 700; }
.lp-caps span { color: var(--lp-ink3); font-size: .8125rem; }

/* ── features (light) ── */
.lp-features { background: linear-gradient(180deg, #f2f6fb 0%, #f8fafc 60%, #fff 100%); padding: 88px 0 96px; }
.lp-sechead { max-width: 760px; margin-bottom: 40px; }
.lp-kicker { margin: 0 0 12px; color: var(--lp-blue); font-weight: 700; font-size: .875rem; letter-spacing: .04em; }
.lp-features h2, .lp-data h2 { color: var(--lp-head); font-size: clamp(1.75rem, 1.25rem + 1.4vw, 2.5rem); line-height: 1.28; }
.lp-seclead { margin: 14px 0 0; font-size: 1.0625rem; color: var(--lp-text); }
.lp-fgrid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 20px; }
.lp-feat-main, .lp-feat { background: #fff; border: 1px solid #e3eaf2; border-radius: 16px; box-shadow: 0 2px 6px -2px rgba(15, 40, 70, .06);
  transition: border-color .2s, box-shadow .2s; }
.lp-feat-main:hover, .lp-feat:hover { border-color: #c9dbec; box-shadow: 0 18px 40px -24px rgba(15, 40, 70, .3); }
.lp-feat-main { padding: 32px 32px 24px; display: flex; flex-direction: column; background: linear-gradient(160deg, #fff 0%, #f4f9fd 100%); }
.lp-ico { flex-shrink: 0; display: inline-flex; width: 48px; height: 48px; align-items: center; justify-content: center; border-radius: 12px;
  background: #e8f2fb; color: var(--lp-blue); }
.lp-ico .ri { width: 24px; height: 24px; vertical-align: 0; }
.lp-feat-main .lp-ico { margin-bottom: 18px; }
.lp-feat-main h3 { color: var(--lp-head); font-size: 1.5rem; margin-bottom: 10px; }
.lp-feat-main > p { margin: 0; font-size: 1.0625rem; max-width: 30em; }
.lp-feat-list { list-style: none; margin: 20px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.lp-feat-list li { padding: 6px 12px; border-radius: 999px; background: #eaf3fb; color: #1d5f93; font-size: .875rem; font-weight: 500; }
.lp-feat-art { display: block; width: 100%; height: auto; margin-top: auto; padding-top: 24px; }
.lp-feat-side { display: grid; grid-template-rows: repeat(3, minmax(0, 1fr)); gap: 20px; }
.lp-feat { display: flex; gap: 18px; align-items: flex-start; padding: 24px; }
.lp-feat h3 { color: var(--lp-head); font-size: 1.1875rem; margin-bottom: 6px; }
.lp-feat p { margin: 0; font-size: 1rem; }

/* ── 무엇을 볼 수 있나요? ── */
.lp-data { background: #fff; padding: 88px 0 96px; border-top: 1px solid #edf1f6; }
.lp-datagrid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr); gap: 64px; align-items: start; }
.lp-points { list-style: none; margin: 0; padding: 0; }
.lp-points li { display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 8px; padding: 26px 0; border-top: 1px solid #e2e8f0; }
.lp-points li:last-child { border-bottom: 1px solid #e2e8f0; }
.lp-pno { color: var(--lp-blue); font-weight: 700; font-size: .9375rem; letter-spacing: .06em; padding-top: 3px; }
.lp-points strong { display: block; color: var(--lp-head); font-size: 1.25rem; margin-bottom: 6px; }
.lp-points p { margin: 0; font-size: 1.0625rem; }

/* ── final CTA ── */
.lp-final { background: radial-gradient(700px 320px at 85% 100%, rgba(58, 163, 224, .35), transparent 70%), linear-gradient(135deg, #0a2a4c, #071d38); padding: 80px 0; }
.lp-finalin { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.lp-final h2 { color: #fff; font-size: clamp(1.5rem, 1.1rem + 1.3vw, 2.25rem); line-height: 1.35; }

.lp-foot { background: var(--lp-navy); color: var(--lp-ink3); font-size: .875rem; border-top: 1px solid var(--lp-line); }
.lp-footin { display: flex; align-items: center; gap: 24px; min-height: 72px; flex-wrap: wrap; }
.lp-foot-brand { color: var(--lp-ink); font-weight: 700; }
.lp-ver { margin-left: auto; }

/* ── responsive ── */
@media (max-width: 1100px) {
  .lp-fgrid { grid-template-columns: minmax(0, 1fr); }
  .lp-datagrid { grid-template-columns: minmax(0, 1fr); gap: 28px; }
}
@media (max-width: 900px) {
  /* 한 열: 문구(남색 바탕) → 아래 이미지 띠(선박·항적이 보이게). 문구가 이미지 위에 겹치지 않음 */
  body.landing { --lp-gut: 24px; --lp-band: min(78vw, 460px); }
  .lp-hero { display: block; min-height: 0; padding: calc(var(--lp-nav-h) + 40px) 0 0; }
  .lp-bg { top: auto; height: var(--lp-band); }
  .lp-bg-img { object-position: 80% 55%; }
  .lp-shade { top: auto; height: var(--lp-band); background: linear-gradient(180deg, #0a2a4c 0%, rgba(10, 42, 76, 0) 32%); }
  .lp-herogrid { padding-bottom: calc(var(--lp-band) + 8px); }
  .lp-caps { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 18px; }
  .lp-caps li:nth-child(3) { padding-left: 0; border-left: 0; }
  .lp-navin { gap: 28px; }
  .lp-links { gap: 24px; }
}
@media (max-width: 760px) {
  body.landing { --lp-gut: 16px; --lp-nav-h: 72px; }
  .lp-brand img { height: 44px; }
  .lp-menu { display: inline-flex; }
  .lp-links { position: absolute; top: var(--lp-nav-h); left: 0; right: 0; flex-direction: column; gap: 0;
    background: rgba(7, 29, 56, .97); border-bottom: 1px solid var(--lp-line); padding: 6px var(--lp-gut) 14px; display: none; }
  .lp-links.is-open { display: flex; }
  .lp-links a { padding: 13px 0; border-bottom: 1px solid var(--lp-line); }
  .lp-links a:last-child { border-bottom: 0; }
  .lp-nav:has(.lp-links.is-open) { background: rgba(7, 29, 56, .97); }
  .lp-btn-nav { min-height: 38px; padding: 0 16px; }
}
@media (max-width: 560px) {
  .lp-hero h1 { font-size: 2rem; }
  .lp-eyebrow { font-size: .8125rem; }
  .lp-cta .lp-btn { flex: 1 1 100%; }

  .lp-features, .lp-data { padding: 64px 0; }
  .lp-feat-main { padding: 24px 22px 18px; }
  .lp-feat { padding: 20px; gap: 14px; }
  .lp-points li { grid-template-columns: 44px minmax(0, 1fr); padding: 22px 0; }
  .lp-final { padding: 64px 0; }
  .lp-finalin .lp-btn { flex: 1 1 100%; }
  .lp-footin { gap: 6px 16px; padding: 16px var(--lp-gut); }
  .lp-ver { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .lp-btn, .lp-feat, .lp-feat-main, .lp-nav { transition: none; }
}