/* ==========================================================================
   Pinekey — pinekey.io
   다크 테크 단일 페이지. 팔레트는 favicon.svg / 404.html 과 공유.
   ========================================================================== */

:root {
  --bg: #0b0f14;
  --surface: #101720;
  --surface-deep: #0d131a;
  --line: #1d2632;
  --line-strong: #2b3a4c;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #4ade80;
  --accent-soft: rgba(74, 222, 128, 0.12);
  --accent-line: rgba(74, 222, 128, 0.38);
  --font-sans: 'IBM Plex Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI',
    'Apple SD Gothic Neo', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --container: 1060px;
  --gutter: clamp(1.25rem, 5vw, 2.5rem);
}

/* ---- base ------------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg);
  background-image: radial-gradient(
    1000px 520px at 78% -12%,
    rgba(74, 222, 128, 0.07),
    transparent 65%
  );
  background-repeat: no-repeat;
  overflow-x: hidden;
}

/* 청사진 그리드 — 아래로 갈수록 사라짐 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(230, 237, 243, 0.027) 1px, transparent 1px),
    linear-gradient(90deg, rgba(230, 237, 243, 0.027) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 78%);
  pointer-events: none;
  z-index: 0;
}

/* 최상단 포인트 라인 */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-line), transparent);
  pointer-events: none;
  z-index: 3;
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

::selection {
  background: var(--accent);
  color: #08110b;
}

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

a {
  color: var(--accent);
  text-decoration: none;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

.site-header {
  padding-block: 1.1rem;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--text);
}

.brand-mark {
  width: 20px;
  height: 20px;
  color: var(--accent);
  flex: none;
}

.brand-text {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
  background: rgba(13, 19, 26, 0.7);
}

.lang-btn {
  appearance: none;
  border: 0;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
}

.lang-btn:hover {
  color: var(--text);
}

.lang-btn.is-active {
  background: var(--accent-soft);
  color: var(--accent);
}

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

.hero {
  position: relative;
  padding-block: clamp(4.5rem, 13vh, 8.5rem) clamp(4rem, 10vh, 7rem);
}

.hero-inner {
  position: relative;
  z-index: 1;
}

/* favicon의 소나무 패스를 와이어프레임으로 크게 */
.hero-tree {
  position: absolute;
  top: 50%;
  right: max(var(--gutter), calc((100vw - var(--container)) / 2 - 2rem));
  width: min(380px, 32vw);
  height: auto;
  transform: translateY(-50%) rotate(4deg);
  color: var(--accent);
  opacity: 0.16;
  pointer-events: none;
}

.hero-eyebrow {
  margin: 0 0 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.logotype {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(2.9rem, 10vw, 6.2rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text);
}

.logotype-accent {
  color: var(--accent);
}

.caret {
  display: inline-block;
  width: 0.5ch;
  height: 0.78em;
  margin-left: 0.12ch;
  background: var(--accent);
  vertical-align: baseline;
  transform: translateY(0.08em);
}

.hero-tagline {
  margin: 1.6rem 0 0;
  font-size: clamp(1.2rem, 3.4vw, 1.7rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

.hero-intro {
  margin: 0.9rem 0 0;
  max-width: 34em;
  color: var(--muted);
  font-size: clamp(0.95rem, 2.4vw, 1.05rem);
}

/* ---- sections ---------------------------------------------------------- */

.section {
  padding-block: clamp(2.6rem, 7vh, 4.5rem);
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: clamp(1.6rem, 4vh, 2.4rem);
}

.section-index {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.35rem, 3.4vw, 1.7rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.section-head::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--line);
  transform: translateY(-0.35em);
}

/* ---- project cards ------------------------------------------------------ */

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.card {
  display: flex;
  flex-direction: column;
  padding: clamp(1.4rem, 4vw, 1.9rem);
  background: linear-gradient(180deg, var(--surface), var(--surface-deep));
  border: 1px solid var(--line);
  border-radius: 14px;
}

.card-top {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 1.2rem;
}

.app-icon {
  width: 44px;
  height: 44px;
  border-radius: 11px;
  border: 1px solid var(--line-strong);
  flex: none;
}

.card-tag {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.card-name-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.card-name {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.stat-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.18rem 0.65rem;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--accent);
  white-space: nowrap;
}

.stat-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.stat-badge.is-soon {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--muted);
}

.stat-badge.is-soon::before {
  background: var(--muted);
}

.card-desc {
  margin: 0.7rem 0 1.3rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.card-link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  padding-bottom: 0.15rem;
  border-bottom: 1px solid var(--accent-line);
}

.link-arrow {
  display: inline-block;
  font-family: var(--font-mono);
}

/* ---- contact ------------------------------------------------------------ */

.contact-desc {
  margin: 0 0 1.6rem;
  max-width: 34em;
  color: var(--muted);
}

.contact-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
}

.contact-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(16, 23, 32, 0.6);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  overflow-wrap: anywhere;
}

.contact-label {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
}

.contact-glyph {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.8rem;
  flex: none;
}

.contact-link .link-arrow {
  color: var(--accent);
  flex: none;
}

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

.site-footer {
  margin-top: clamp(2rem, 6vh, 4rem);
  border-top: 1px solid var(--line);
  padding-block: 1.6rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-inner p {
  margin: 0;
  font-size: 0.84rem;
  color: var(--muted);
}

.footer-mono {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
}

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

@media (min-width: 760px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .contact-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 899px) {
  .hero-tree {
    display: none;
  }
}

/* ---- motion (reduced-motion 존중: 모든 움직임은 이 블록 안에서만) -------- */

@media (prefers-reduced-motion: no-preference) {
  .caret {
    animation: caret-blink 1.15s steps(1, end) infinite;
  }

  @keyframes caret-blink {
    50% {
      opacity: 0;
    }
  }

  .hero-inner > * {
    animation: rise 0.55s cubic-bezier(0.22, 1, 0.36, 1) backwards;
  }

  .hero-inner > *:nth-child(1) {
    animation-delay: 0.05s;
  }
  .hero-inner > *:nth-child(2) {
    animation-delay: 0.13s;
  }
  .hero-inner > *:nth-child(3) {
    animation-delay: 0.21s;
  }
  .hero-inner > *:nth-child(4) {
    animation-delay: 0.29s;
  }

  @keyframes rise {
    from {
      opacity: 0;
      transform: translateY(14px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .card,
  .contact-link,
  .lang-btn,
  .card-link .link-arrow {
    transition:
      border-color 0.2s ease,
      background-color 0.2s ease,
      color 0.2s ease,
      transform 0.2s ease,
      box-shadow 0.2s ease;
  }

  .card:hover {
    transform: translateY(-3px);
  }

  .card-link:hover .link-arrow {
    transform: translate(2px, -2px);
  }
}

/* hover 색 변화는 모션 설정과 무관하게 적용 */
.card:hover {
  border-color: var(--accent-line);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.contact-link:hover {
  border-color: var(--accent-line);
  background: rgba(74, 222, 128, 0.05);
}