/* 리서치 피드 — 글 목록을 빨리 훑는 것이 목적인 읽기 도구.
   기본선: Pretendard 실제 로드(index.html) · 밝은/어두운 테마 · :focus-visible · reduced-motion 게이트 · 400px 가로 스크롤 없음 */

:root {
  color-scheme: light dark;
  --tap: rgba(0, 0, 0, 0.08);
  --bg: #f6f5f1;
  --surface: #ffffff;
  --ink: #1c1b19;
  --ink-2: #4f4c46;
  --ink-3: #6b675f;
  --line: #dedbd2;
  --line-soft: #e9e6de;
  --svc: #0c6a61;          /* 대분류 1 미리디 서비스 */
  --svc-bg: #e3f1ee;
  --ai: #474cb0;           /* 대분류 2 AI · LLM 일반 */
  --ai-bg: #e8e9f8;
  --note-bg: #fbf3df;
  --note-ink: #6a4a05;
  --focus: #1257d6;
  --font: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo",
          "Noto Sans KR", "Malgun Gothic", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --tap: rgba(255, 255, 255, 0.12);
    --bg: #141413;
    --surface: #1c1c1a;
    --ink: #eceae4;
    --ink-2: #bdb9b0;
    --ink-3: #9a968d;
    --line: #33312d;
    --line-soft: #282724;
    --svc: #62c9bc;
    --svc-bg: #14302c;
    --ai: #a3a8ff;
    --ai-bg: #22244a;
    --note-bg: #33290f;
    --note-ink: #f0d48a;
    --focus: #8ab4ff;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  word-break: keep-all;
  overflow-wrap: anywhere;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

button, input { font: inherit; color: inherit; }

button, label, summary, a {
  touch-action: manipulation;
  -webkit-tap-highlight-color: var(--tap);
}

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

.skip {
  position: absolute;
  left: 12px;
  top: -48px;
  z-index: 10;
  padding: 8px 12px;
  background: var(--ink);
  color: var(--bg);
  border-radius: 6px;
  text-decoration: none;
}
.skip:focus { top: 12px; }

/* ── 머리 ── */
.top { border-bottom: 1px solid var(--line); background: var(--surface); }
.top-in {
  max-width: 1080px;
  margin: 0 auto;
  padding: 20px max(20px, env(safe-area-inset-right)) 16px max(20px, env(safe-area-inset-left));
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 8px 24px;
}
.brand h1 { text-wrap: balance; margin: 0; font-size: 1.375rem; font-weight: 700; letter-spacing: -0.01em; line-height: 1.3; }
.sub { margin: 2px 0 0; color: var(--ink-2); font-size: 0.9375rem; }
.updated { margin: 0; color: var(--ink-3); font-size: 0.8125rem; font-variant-numeric: tabular-nums; }

/* ── 배치 ── */
.layout {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px max(20px, env(safe-area-inset-right)) 56px max(20px, env(safe-area-inset-left));
  display: grid;
  grid-template-columns: 256px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}
main { min-width: 0; max-width: 720px; }
main:focus:not(:focus-visible) { outline: none; }  /* 버튼을 눌러 옮겨 온 초점에는 테두리를 그리지 않는다 */

/* ── 주제 선택 ── */
.side { position: sticky; top: 16px; max-height: calc(100dvh - 32px); overflow-y: auto; padding-right: 4px; }
.filters > summary {
  list-style: none;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  font-weight: 700;
  font-size: 0.9375rem;
  padding: 2px 0 10px;
}
.filters > summary::-webkit-details-marker { display: none; }
.sel-count { color: var(--ink-3); font-weight: 500; font-size: 0.8125rem; font-variant-numeric: tabular-nums; }

.filter-actions { display: flex; gap: 8px; margin-bottom: 14px; }
.filter-actions button, .copy, .more button, .link-btn {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 0.8125rem;
  cursor: pointer;
  min-height: 32px;
}
.filter-actions button:hover, .copy:hover, .more button:hover, .link-btn:hover { border-color: var(--ink-3); }

.group { border: 0; margin: 0 0 18px; padding: 0; min-width: 0; }
.group legend {
  padding: 0;
  margin-bottom: 6px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--ink-2);
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
}
.group legend .dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.group[data-group="service"] .dot { background: var(--svc); }
.group[data-group="ai"] .dot { background: var(--ai); }
.group-toggle {
  margin-left: auto;
  border: 0;
  background: none;
  padding: 2px 4px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--ink-3);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.group-toggle:hover { color: var(--ink); }

.checks { display: grid; gap: 1px; }
.check {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 6px;
  margin: 0 -6px;
  border-radius: 6px;
  font-size: 0.875rem;
  cursor: pointer;
  min-height: 32px;
}
.check:hover { background: var(--line-soft); }
.check input { width: 16px; height: 16px; margin: 0; flex: none; accent-color: var(--ink); }
.check span { min-width: 0; }
.check .n { margin-left: auto; flex: none; color: var(--ink-3); font-size: 0.75rem; font-variant-numeric: tabular-nums; }

.copy { width: 100%; margin-top: 2px; }
.copy-msg { min-height: 1.2em; margin: 6px 0 0; font-size: 0.75rem; color: var(--ink-3); }

/* ── 알림 · 총평 ── */
.notices { display: grid; gap: 8px; }
.notice {
  margin: 0 0 4px;
  padding: 10px 12px;
  background: var(--note-bg);
  color: var(--note-ink);
  border-radius: 8px;
  font-size: 0.875rem;
}

.weekly {
  margin: 0 0 20px;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
}
.weekly h2 { margin: 0 0 8px; font-size: 0.8125rem; font-weight: 700; color: var(--ink-2); }
.weekly p { margin: 0; font-size: 0.9375rem; }
.weekly dl { margin: 0; display: grid; gap: 6px; font-size: 0.9375rem; }
.weekly dt { font-weight: 700; display: inline; }
.weekly dd { margin: 0; display: inline; color: var(--ink-2); }
.weekly details { margin-top: 10px; }
.weekly details p { margin-top: 6px; color: var(--ink-2); }

/* ── 글 목록 ── */
.feed-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-bottom: 4px; }
.result-count { margin: 0; color: var(--ink-3); font-size: 0.8125rem; font-variant-numeric: tabular-nums; }
.active-kw { font-size: 0.8125rem; }

.day {
  margin: 22px 0 0;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--ink);
  font-size: 0.8125rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
.day .n { font-weight: 500; color: var(--ink-3); }

.item {
  padding: 16px 0 18px;
  border-bottom: 1px solid var(--line);
  content-visibility: auto;            /* 글이 수백 건이어도 화면 밖은 그리지 않는다 */
  contain-intrinsic-size: auto 150px;
}
.item-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 8px;
  margin-bottom: 6px;
  font-size: 0.75rem;
  color: var(--ink-3);
}
.tag {
  border: 0;
  border-radius: 4px;
  padding: 2px 7px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  line-height: 1.5;
}
.tag[data-group="service"] { background: var(--svc-bg); color: var(--svc); }
.tag[data-group="ai"] { background: var(--ai-bg); color: var(--ai); }
.tag:hover { text-decoration: underline; text-underline-offset: 2px; }
.badge-new {
  background: var(--ink);
  color: var(--bg);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.6875rem;
  font-weight: 700;
}
.item h3 { text-wrap: balance; margin: 0; font-size: 1.0625rem; font-weight: 650; line-height: 1.45; letter-spacing: -0.005em; }
.item h3 a { text-decoration: none; }
.item h3 a:hover { text-decoration: underline; text-underline-offset: 3px; }
.item h3 a::after { content: " ↗"; color: var(--ink-3); font-weight: 400; font-size: 0.8125rem; }
.one-line { text-wrap: pretty; margin: 6px 0 0; color: var(--ink-2); font-size: 0.9375rem; }
.relevance {
  margin: 10px 0 0;
  padding: 8px 12px;
  border-left: 3px solid var(--svc);
  background: var(--surface);
  font-size: 0.875rem;
}
.relevance b { font-weight: 700; margin-right: 6px; }
.item details { margin-top: 8px; }
.item details > summary, .weekly details > summary {
  display: inline-block;
  cursor: pointer;
  font-size: 0.8125rem;
  color: var(--ink-3);
  text-decoration: underline;
  text-underline-offset: 2px;
  list-style: none;
  padding: 2px 0;
}
.item details > summary::-webkit-details-marker, .weekly details > summary::-webkit-details-marker { display: none; }
.item details[open] > summary, .weekly details[open] > summary { color: var(--ink-2); }
.bullets { margin: 6px 0 0; padding-left: 18px; font-size: 0.9375rem; color: var(--ink-2); }
.bullets li { margin: 3px 0; }
.kws { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.kw {
  border: 1px solid var(--line);
  background: none;
  border-radius: 999px;
  padding: 1px 9px;
  font-size: 0.75rem;
  color: var(--ink-2);
  cursor: pointer;
  line-height: 1.6;
}
.kw:hover { border-color: var(--ink-3); }

.empty { margin: 28px 0; padding: 20px; border: 1px dashed var(--line); border-radius: 10px; color: var(--ink-2); font-size: 0.9375rem; }
.empty .link-btn { margin-top: 10px; }
.more { margin-top: 24px; }

.foot { border-top: 1px solid var(--line); }
.foot p { max-width: 1080px; margin: 0 auto; padding: 16px max(20px, env(safe-area-inset-right)) max(28px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left)); color: var(--ink-3); font-size: 0.75rem; }

/* ── 좁은 화면: 주제 선택이 접히는 패널이 된다 ── */
@media (max-width: 899px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 16px; padding-top: 16px; }
  .side { position: static; max-height: none; overflow: visible; padding-right: 0; }
  .filters { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 0 14px; }
  .filters > summary { padding: 12px 0; cursor: pointer; }
  .filters > summary span:first-child::before { content: "▸ "; color: var(--ink-3); }
  .filters[open] > summary span:first-child::before { content: "▾ "; }
  .filter-form { padding-bottom: 14px; }
  .check { min-height: 40px; }
  main { max-width: none; }
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}