/* elcherlab.com — 정적 랜딩 페이지 */

:root {
  --bg:        #f6f7f9;
  --surface:   #ffffff;
  --border:    #e2e5ea;
  --border-hi: #b9c0cc;
  --text:      #1b1f26;
  --muted:     #5b6472;
  --faint:     #8a94a3;
  --accent:    #2f6ae1;
  --note-bg:   #f1f5fd;
  --note-bd:   #cfdcf7;
  --shadow:    0 1px 2px rgba(16, 24, 40, .05);
  --shadow-hi: 0 6px 20px rgba(16, 24, 40, .10);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #12151a;
    --surface:   #1a1e25;
    --border:    #2b313b;
    --border-hi: #47505f;
    --text:      #e8ebf0;
    --muted:     #a3acba;
    --faint:     #79828f;
    --accent:    #7ba6f7;
    --note-bg:   #1b2331;
    --note-bd:   #2e3d55;
    --shadow:    0 1px 2px rgba(0, 0, 0, .4);
    --shadow-hi: 0 6px 20px rgba(0, 0, 0, .5);
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto,
               "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.wrap {
  max-width: 46rem;
  margin: 0 auto;
  padding: 3rem 1.125rem 3.5rem;
}

/* ── 상단 소개 ─────────────────────────────── */

.intro { margin-bottom: 2.25rem; }

.intro h1 {
  margin: 0 0 .5rem;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -.02em;
}

.intro .dot { color: var(--accent); }

.intro p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
}

/* ── 카드 ──────────────────────────────────── */

.cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;   /* 모바일: 세로로 쌓임 */
  gap: 1rem;
}

.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 1.375rem 1.25rem 1.125rem;
  transition: border-color .15s, box-shadow .15s, transform .15s;
}

.card h2 {
  margin: 0;
  font-size: 1.175rem;
  font-weight: 700;
  letter-spacing: -.01em;
}

/* 카드 전체를 클릭 가능하게 (stretched link) */
.card-link {
  color: inherit;
  text-decoration: none;
}
.card-link::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
}

.card .host {
  margin: .175rem 0 .75rem;
  color: var(--faint);
  font-size: .8125rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.card .desc {
  margin: 0;
  color: var(--muted);
  font-size: .9375rem;
}

.card .note {
  margin: .875rem 0 0;
  padding: .625rem .75rem;
  background: var(--note-bg);
  border: 1px solid var(--note-bd);
  border-radius: 9px;
  color: var(--muted);
  font-size: .8438rem;
  line-height: 1.6;
}
.card .note strong { color: var(--text); }

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .95em;
}

.card .go {
  margin: 1rem 0 0;
  color: var(--accent);
  font-size: .875rem;
  font-weight: 600;
}

.arrow {
  display: inline-block;
  transition: transform .15s;
}

/* 호버 / 포커스 상태 — 키보드 접근성 포함 */
.card:hover,
.card:focus-within {
  border-color: var(--border-hi);
  box-shadow: var(--shadow-hi);
  transform: translateY(-2px);
}

.card:hover .arrow,
.card:focus-within .arrow {
  transform: translateX(4px);
}

.card:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* 링크 자체의 기본 포커스 링은 카드 아웃라인으로 대체 */
.card-link:focus { outline: none; }
.card-link:focus-visible { outline: none; }

.card:active { transform: translateY(0); }

/* ── 하단 ──────────────────────────────────── */

footer {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  font-size: .875rem;
}

footer a {
  color: var(--muted);
  text-decoration: none;
  border-radius: 4px;
}

footer a:hover { color: var(--accent); text-decoration: underline; }

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

/* ── 넓은 화면 ─────────────────────────────── */

@media (min-width: 42rem) {
  .wrap { padding-top: 4.5rem; }
  .intro h1 { font-size: 2rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
  .card:hover, .card:focus-within { transform: none; }
}