/* ===========================================================================
   JiniSynth — 랜딩 페이지
   팔레트는 앱(android/.../ui/theme/Theme.kt)에서 가져왔다. 어두운 공연장에서 눈부시지
   않게 고른 무대용 검정과, 조명 아래서도 읽히는 시안. 사이트와 앱이 같은 물건으로
   보여야 한다. 빌드 단계 없음: 이 파일 하나가 전부다.
   =========================================================================== */

:root {
  color-scheme: dark;

  --bg:          #0b0f16;   /* Theme.kt Bg */
  --bg-1:        #141a24;   /* Surface1 */
  --bg-2:        #1c2430;   /* Surface2 */
  --bg-sunken:   #070a10;
  --fg:          #e6edf6;   /* onSurface */
  --fg-dim:      #a9b6c7;
  --fg-mute:     #8fa0b5;   /* TextDim */
  --border:      #26303d;   /* outline */
  --border-soft: #1a212c;

  --accent:      #38bdf8;   /* Accent */
  --accent-2:    #7dd3fc;
  --accent-deep: #0ea5e9;   /* AccentDim */
  --accent-dim:  #0c3448;
  --on-accent:   #04121c;   /* onPrimary */
  --ok:          #22c55e;   /* OkGreen */
  --warn:        #f59e0b;   /* WarnAmber */

  --mono: ui-monospace, "Cascadia Code", "JetBrains Mono", Consolas, "D2Coding", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;

  --wrap: 1120px;
  --r: 12px;
  --shadow: 0 18px 50px rgba(0, 0, 0, .5);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  word-break: keep-all;        /* 한국어 문장이 어절 중간에서 끊기지 않게 */
  overflow-wrap: anywhere;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); }
code { font-family: var(--mono); font-size: .88em; }
b, strong { color: #fff; font-weight: 600; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

.skip-link {
  position: absolute; left: -9999px; top: 8px; z-index: 100;
  background: var(--accent); color: var(--on-accent); padding: 8px 14px; border-radius: 6px;
}
.skip-link:focus { left: 12px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.dot {
  display: inline-block; width: 7px; height: 7px; border-radius: 50%;
  background: var(--fg-mute); flex: none; vertical-align: middle;
}
.dot-ok { background: var(--ok); }

/* ── 버튼 ────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 9px 18px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg-2); color: var(--fg);
  font: inherit; font-weight: 500; cursor: pointer; white-space: nowrap;
  transition: background .16s ease, border-color .16s ease, transform .16s ease, box-shadow .16s ease;
}
.btn:hover { background: #242e3c; border-color: #354151; color: var(--fg); }
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent); border-color: var(--accent); color: var(--on-accent); font-weight: 650;
  box-shadow: 0 6px 22px rgba(56, 189, 248, .22);
}
.btn-primary:hover {
  background: var(--accent-2); border-color: var(--accent-2); color: var(--on-accent);
  box-shadow: 0 8px 30px rgba(56, 189, 248, .34);
}

.btn-lg { padding: 13px 24px; font-size: 15px; border-radius: 10px; }
.btn-sm { padding: 6px 14px; font-size: 14px; }
.ico { flex: none; }

/* ── 내비게이션 ───────────────────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 15, 22, .72);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, background .2s ease;
}
.nav.scrolled { border-bottom-color: var(--border-soft); background: rgba(11, 15, 22, .92); }

.nav-inner { display: flex; align-items: center; gap: 24px; height: 62px; }

.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); }
.brand:hover { color: #fff; }
.brand-name { font-size: 17px; font-weight: 500; letter-spacing: -.2px; }
.brand-name b { font-weight: 750; color: var(--accent); }

.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  color: var(--fg-dim); font-size: 14.5px; padding: 6px 12px; border-radius: 7px;
  transition: color .15s ease, background .15s ease;
}
.nav-links a:hover { color: var(--fg); background: rgba(255, 255, 255, .05); }

/* 언어 전환 — 현재 언어는 링크가 아니라 라벨이다 */
.lang {
  display: flex; align-items: center; gap: 2px;
  padding: 2px; border: 1px solid var(--border); border-radius: 999px;
  background: var(--bg-1); font-size: 12.5px; flex: none;
}
.lang a, .lang .lang-on {
  padding: 3px 11px; border-radius: 999px; white-space: nowrap; line-height: 1.5;
}
.lang a { color: var(--fg-mute); transition: color .15s ease, background .15s ease; }
.lang a:hover { color: var(--fg); background: rgba(255, 255, 255, .06); }
.lang .lang-on { background: var(--accent-dim); color: #e6f6ff; font-weight: 600; }

/* ── 히어로 ──────────────────────────────────────────────────────────── */
.hero { position: relative; padding: 72px 0 84px; overflow: hidden; }

.glow {
  position: absolute; inset: -30% -10% auto -10%; height: 760px; pointer-events: none;
  background:
    radial-gradient(44% 40% at 22% 34%, rgba(56, 189, 248, .15), transparent 70%),
    radial-gradient(34% 34% at 76% 30%, rgba(14, 165, 233, .10), transparent 70%);
  filter: blur(6px);
}

.hero-inner {
  position: relative;
  /* 영상 칸은 휴대폰 틀 폭만큼만, 나머지는 전부 문구에 — 영어 제목이 한 줄에 들어가게 */
  display: grid; grid-template-columns: minmax(0, 1fr) auto;
  gap: 64px; align-items: center;
}

.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.16; letter-spacing: -1.4px; font-weight: 750; color: #fff;
}
/* 영어 제목은 한국어보다 길다. 같은 크기면 "ringing." 이 혼자 다음 줄로 떨어진다. */
html[lang="en"] .hero h1 { font-size: clamp(30px, 3.9vw, 50px); text-wrap: balance; }

.lede { margin: 0 0 32px; font-size: clamp(16px, 1.4vw, 18px); color: var(--fg-dim); max-width: 46ch; }
.lede b { color: #eef4fb; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.hero-meta { margin: 20px 0 0; font-size: 13.5px; color: var(--fg-mute); }

/* ── 히어로: 영상 — 세로(9:16) 쇼츠라 휴대폰 모양 틀에 담는다 ─────────── */
.hero-demo { margin: 0; max-width: 320px; justify-self: center; }

.phone {
  position: relative; display: block;
  width: min(300px, 76vw); aspect-ratio: 9 / 16; margin: 0 auto;
  padding: 9px; border-radius: 34px;
  background: #05070b; border: 1px solid var(--border);
  box-shadow: var(--shadow), 0 30px 90px rgba(56, 189, 248, .10);
  transition: transform .4s ease, box-shadow .4s ease;
}
.phone:hover { transform: translateY(-3px); box-shadow: var(--shadow), 0 34px 100px rgba(56, 189, 248, .18); }
.phone img, .phone iframe {
  width: 100%; height: 100%; border: 0; border-radius: 26px;
  object-fit: cover; background: var(--bg-sunken);
}
.phone.playing { transform: none; }

.play {
  position: absolute; left: 50%; top: 50%; width: 74px; height: 74px; margin: -37px 0 0 -37px;
  display: grid; place-items: center; border-radius: 50%;
  background: rgba(56, 189, 248, .94); color: var(--on-accent);
  box-shadow: 0 10px 40px rgba(56, 189, 248, .45);
  transition: transform .2s ease, background .2s ease;
}
.play svg { margin-left: 3px; }
.phone:hover .play { transform: scale(1.07); background: var(--accent-2); }

.hero-demo figcaption {
  margin-top: 14px; text-align: center; font-size: 13px; color: var(--fg-mute);
}

/* ── 섹션 공통 ───────────────────────────────────────────────────────── */
.sec { padding: 92px 0; }
.sec.alt { background: var(--bg-1); border-block: 1px solid var(--border-soft); }

.eyebrow {
  display: block; font-size: 12.5px; font-weight: 600; letter-spacing: 1.4px;
  text-transform: uppercase; color: var(--accent); margin-bottom: 12px;
}
.sec h2 {
  margin: 0 0 14px; font-size: clamp(25px, 3.2vw, 35px);
  line-height: 1.3; letter-spacing: -.8px; font-weight: 700; color: #fff;
}
.sec-head { max-width: 720px; margin-bottom: 48px; }
.sec-sub { margin: 0; color: var(--fg-dim); font-size: 16.5px; }

/* ── 기능 그리드 ─────────────────────────────────────────────────────── */
.feat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.feat {
  padding: 28px; border: 1px solid var(--border); border-radius: var(--r);
  background: var(--bg-2); transition: border-color .18s ease;
}
.feat:hover { border-color: #3a4757; }
.feat h3 {
  margin: 0 0 10px; font-size: 19px; font-weight: 650; color: #fff;
  display: flex; align-items: baseline; gap: 10px;
}
.feat-n { font-family: var(--mono); font-size: 13px; color: var(--accent); font-weight: 600; }
.feat > p { margin: 0 0 18px; color: var(--fg-dim); font-size: 15px; }

.ticks { list-style: none; margin: 0; padding: 0; display: grid; gap: 7px; }
.ticks li {
  position: relative; padding-left: 24px; font-size: 14.5px; color: var(--fg-dim);
}
.ticks li::before {
  content: ""; position: absolute; left: 4px; top: 9px;
  width: 9px; height: 5px; border-left: 2px solid var(--ok); border-bottom: 2px solid var(--ok);
  transform: rotate(-45deg);
}
/* 안 되는 것. 체크 표시를 붙이면 되는 것처럼 읽힌다. */
.ticks li.caveat { color: var(--fg-mute); }
.ticks li.caveat::before {
  left: 5px; top: 10px; width: 8px; height: 8px; border: 0; border-radius: 50%;
  background: var(--warn); transform: none;
}

/* ── 다운로드 ────────────────────────────────────────────────────────── */
.dl-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; align-items: start; }
/* 카드가 하나뿐일 때는 가운데로 모은다 — 반쪽만 차 있으면 빠뜨린 것처럼 보인다 */
.dl-grid.one { grid-template-columns: minmax(0, 580px); justify-content: center; }

.dl-card {
  padding: 28px; border: 1px solid var(--border); border-radius: var(--r);
  background: var(--bg-1); display: flex; flex-direction: column; gap: 18px;
}
.dl-card.primary {
  border-color: rgba(56, 189, 248, .35);
  background: linear-gradient(180deg, rgba(56, 189, 248, .07), transparent 55%), var(--bg-1);
}

.dl-os { display: flex; align-items: center; gap: 14px; color: var(--accent-2); }
.dl-os h3 { margin: 0; font-size: 19px; color: #fff; font-weight: 650; }
.dl-sub { margin: 0; font-size: 13.5px; color: var(--fg-mute); }

.dl-btn { width: 100%; }

.dl-meta { margin: 0; font-size: 13.5px; color: var(--fg-mute); line-height: 1.65; }
.dl-meta .dot { margin-right: 6px; }

.dl-notes { list-style: none; margin: 0; padding: 16px 0 0; border-top: 1px solid var(--border-soft); display: grid; gap: 7px; }
.dl-notes li { font-size: 13.5px; color: var(--fg-mute); padding-left: 14px; position: relative; }
.dl-notes li::before { content: "·"; position: absolute; left: 3px; }
.dl-notes code { color: var(--fg-dim); background: var(--bg-sunken); padding: 1px 6px; border-radius: 4px; }

.contact {
  margin: 30px auto 0; max-width: 580px; text-align: center;
  font-size: 14.5px; color: var(--fg-mute);
}

/* ── 푸터 ────────────────────────────────────────────────────────────── */
.foot { border-top: 1px solid var(--border-soft); background: var(--bg-1); padding: 34px 0; }
.foot-inner { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.foot-brand { display: flex; align-items: center; gap: 12px; }
.foot-tag { font-size: 13px; color: var(--fg-mute); }
.foot-links { display: flex; flex-wrap: wrap; gap: 20px; margin-left: auto; }
.foot-links a { color: var(--fg-mute); font-size: 14px; }
.foot-links a:hover { color: var(--fg); }

/* ── 스크롤 등장 ─────────────────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ── 반응형 ──────────────────────────────────────────────────────────── */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .lang { margin-left: auto; }
  .nav-links { display: none; }
}

@media (max-width: 760px) {
  .wrap { padding: 0 16px; }
  .sec { padding: 66px 0; }
  .hero { padding: 44px 0 60px; }
  .feat-grid, .dl-grid { grid-template-columns: 1fr; }
  .feat, .dl-card { padding: 22px; }
  .hero-actions .btn { flex: 1 1 100%; }
  .nav-inner { gap: 14px; }
  .nav-cta { display: none; }
  .foot-links { margin-left: 0; gap: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
}