/* Calibre Signal landing — Phosphor Black, 앱 토큰(apps/app/src/theme/tokens.ts) 1:1.
   컬러 컨벤션: 상승=빨강 / 하락=파랑 (국내, CARD-RULES §3). 시안은 브랜드/인터랙션 전용. */

:root {
  --bg: #000000;
  --surface: #101010;
  --elevated: #161616;
  --text: #f2f2f2; /* 순백 금지 (헐레이션 규칙) */
  --text-2: #a6a6a6;
  --muted: #8a8a8a;
  --prose: #cfcfcf;
  --border: #2a2a2a;
  --border-strong: #3a3a3a;
  --hairline: #1e1e1e;
  --accent: #2dd4ff;
  --accent-hover: #6be0ff;
  --accent-dim: rgba(45, 212, 255, 0.13);
  --green: #2bee34; /* 앱 기본(서구) 컨벤션 — status.success·data up과 동일 */
  --red: #ff5c5c;
  --yellow: #facc15; /* 앱 dataTokens.neutral */
  --yellow-text: #fde047; /* 앱 dataTokens.neutralText */
  --urgent: #fb923c;
  --sans: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont,
    "Apple SD Gothic Neo", "Noto Sans KR", "Segoe UI", Roboto, sans-serif;
  --mono: "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  word-break: keep-all; /* 한국어: 단어 중간 줄바꿈 방지 */
  overflow-wrap: break-word;
}

::selection {
  background: var(--accent-dim);
  color: var(--accent-hover);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 150ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  a:hover {
    color: var(--accent-hover);
  }
}

.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
}

.mono {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

/* ---------------------------------------------------------------- header */

.site-header {
  padding: 28px 0;
}

.site-header .container {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.wordmark {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.3em;
  color: var(--text);
  white-space: nowrap;
}

.wordmark .block {
  color: var(--accent);
  margin-right: 0.35em;
}

.lang-nav {
  display: flex;
  align-items: baseline;
  gap: 18px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.lang-nav a {
  color: var(--muted);
  transition: color 150ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .lang-nav a:hover {
    color: var(--text);
  }
}

.lang-nav .current {
  color: var(--text);
  font-weight: 700;
}

/* ------------------------------------------------------------------ hero */

.hero {
  padding: 88px 0 64px;
  text-align: center;
  position: relative;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.25;
  }
}

.hero h1 {
  font-size: clamp(38px, 6.4vw, 66px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.022em;
  text-wrap: balance;
}

.hero h1 .accent {
  color: var(--accent);
}

.hero .sub {
  margin: 22px auto 0;
  max-width: 560px;
  color: var(--text-2);
  font-size: 17px;
  line-height: 1.7;
  text-wrap: pretty;
}

.hero .sub-line {
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.cta-row {
  margin-top: 36px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.store-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--text-2);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 12px 22px;
}

.store-chip .soon {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.cta-caption {
  margin-top: 16px;
  font-size: 13px;
  color: var(--muted);
}

/* --------------------------------------------------------------- mockup */

.mockup-wrap {
  position: relative;
  padding: 24px 0 0;
}

.mockup-glow {
  position: absolute;
  inset: -10% 15% auto;
  height: 420px;
  background: radial-gradient(closest-side, rgba(45, 212, 255, 0.09), transparent 70%);
  pointer-events: none;
}

.terminal {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  text-align: left;
}

.tape {
  display: flex;
  align-items: center;
  gap: 0;
  border-bottom: 1px solid var(--hairline);
  padding: 12px 0;
  overflow: hidden;
  position: relative;
}

.tape-live {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--green);
  padding: 0 16px;
  border-right: 1px solid var(--hairline);
  flex: none;
  background: var(--surface);
  z-index: 1;
}

.tape-live .dot {
  width: 5px;
  height: 5px;
  border-radius: 999px;
  background: var(--green);
  animation: pulse 2.4s var(--ease-in-out) infinite;
}

.tape-viewport {
  flex: 1;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, #000 4%, #000 96%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, #000 4%, #000 96%, transparent);
}

.tape-track {
  display: inline-flex;
  white-space: nowrap;
  animation: tape 46s linear infinite;
}

@keyframes tape {
  to {
    transform: translateX(-50%);
  }
}
.tape-group {
  display: inline-flex;
  gap: 30px;
  padding: 0 15px;
  font-family: var(--mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--text-2);
}

.tape-group b {
  font-weight: 500;
  color: var(--muted);
  margin-right: 7px;
}

.q-up {
  color: var(--green);
}

.q-down {
  color: var(--red);
}

.feed-card {
  display: flex;
  gap: 14px;
  padding: 16px 18px 15px 16px;
  border-bottom: 1px solid var(--hairline);
}

.feed-card .edge {
  flex: none;
  width: 3px;
  border-radius: 2px;
  background: var(--border-strong);
}

/* 베이스(.feed-card .edge)보다 뒤에 같은 특이성으로 선언해야 색이 이긴다 */
.feed-card .edge-up {
  background: var(--green);
}

.feed-card .edge-down {
  background: var(--red);
}

.feed-card .edge-neutral {
  background: var(--yellow);
}

.feed-card .body {
  flex: 1;
  min-width: 0;
}

.feed-meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.feed-meta .pub {
  font-weight: 700;
  color: var(--muted);
}

.feed-meta .time {
  color: var(--muted);
}

.feed-headline {
  margin-top: 6px;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: -0.01em;
}

.feed-tags {
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  font-size: 11.5px;
  color: var(--text-2);
  background: rgba(138, 138, 138, 0.12);
  border-radius: 6px;
  padding: 3px 8px;
}

.sent {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.sent-up {
  color: var(--green);
}

.sent-down {
  color: var(--red);
}

.sent-neutral {
  color: var(--yellow-text);
}

.ai-strip {
  padding: 16px 18px 18px;
  background: var(--elevated);
}

.ai-label {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--accent);
}

.ai-q {
  margin-top: 10px;
  font-size: 13.5px;
  color: var(--muted);
}

.ai-a {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--prose);
}

.cite {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--accent);
  background: var(--accent-dim);
  border-radius: 999px;
  padding: 2px 9px;
  margin: 0 4px;
  vertical-align: 1px;
}

.mockup-caption {
  margin: 14px auto 0;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
}

/* -------------------------------------------------------------- features */

.section {
  padding: 104px 0 0;
}

.section-kicker {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--accent);
}

.section h2 {
  margin-top: 12px;
  font-size: clamp(26px, 3.6vw, 34px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
  text-wrap: balance;
}

.section .section-sub {
  margin-top: 12px;
  max-width: 560px;
  color: var(--text-2);
  text-wrap: pretty;
}

.feature-grid {
  margin-top: 44px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.feature {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 16px;
  padding: 24px 22px 26px;
}

.feature .f-kicker {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--accent);
}

.feature h3 {
  margin-top: 14px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.feature p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-2);
  text-wrap: pretty;
}

/* ---------------------------------------------------------------- footer */

.site-footer {
  border-top: 1px solid var(--hairline);
  margin-top: 104px;
  padding: 56px 0 48px;
}

.disclaimer {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

.footer-row {
  margin-top: 28px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 1px solid var(--hairline);
  padding-top: 24px;
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 13px;
  color: var(--text-2);
  transition: color 150ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .footer-links a:hover {
    color: var(--text);
  }
}

.footer-copy {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}

/* -------------------------------------------------------------- doc pages */

.doc {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 24px 96px;
}

.doc-banner {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  background: var(--surface);
  padding: 14px 18px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-2);
  margin: 8px 0 40px;
}

.doc h1 {
  font-size: 27px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.35;
  margin-top: 24px;
}

.doc .doc-meta {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--muted);
}

.doc h2 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 44px 0 0;
}

.doc h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin: 28px 0 0;
}

.doc p,
.doc li {
  font-size: 15px;
  line-height: 1.8;
  color: var(--prose);
}

.doc p {
  margin-top: 14px;
}

.doc ol,
.doc ul {
  margin-top: 14px;
  padding-left: 22px;
}

.doc li {
  margin-top: 6px;
}

.doc li::marker {
  color: var(--muted);
}

.doc strong {
  color: var(--text);
}

.doc table {
  width: 100%;
  margin-top: 16px;
  border-collapse: collapse;
  font-size: 13.5px;
  line-height: 1.6;
}

.doc th {
  text-align: left;
  font-weight: 600;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
  padding: 8px 12px 8px 0;
  white-space: nowrap;
}

.doc td {
  color: var(--prose);
  border-bottom: 1px solid var(--hairline);
  padding: 9px 12px 9px 0;
  vertical-align: top;
}

.doc .table-scroll {
  overflow-x: auto;
}

.doc .table-scroll table {
  min-width: 560px;
}

.doc hr {
  border: 0;
  border-top: 1px solid var(--hairline);
  margin: 44px 0 0;
}

.doc .addendum {
  margin-top: 20px;
  font-size: 14px;
  color: var(--muted);
}

.doc-note {
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--muted);
}

.back-home {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-top: 48px;
  transition: color 150ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .back-home:hover {
    color: var(--accent);
  }
}

/* ------------------------------------------------------------ reveal (JS) */
/* 숨김 상태는 .js 스코프 — JS 미실행 환경에선 콘텐츠가 그냥 보인다 (점진적 향상) */

.reveal {
  transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
  transition-delay: var(--d, 0ms);
}

.js .reveal {
  opacity: 0;
  transform: translateY(12px);
}

.js .reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* ------------------------------------------------------------- responsive */

@media (max-width: 860px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .hero {
    padding-top: 56px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding-top: 80px;
  }

  .site-footer {
    margin-top: 80px;
  }

  .feed-headline {
    font-size: 14.5px;
  }
}

/* --------------------------------------------------------- reduced motion */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .tape-track {
    animation: none;
  }

  .kicker-chip .dot,
  .tape-live .dot {
    animation: none;
  }

  .js .reveal {
    transform: none;
    transition: opacity 300ms ease;
  }
}