/*
  App_TC HR 화면 스타일
  모델: 사용 안 함
  기술: CSS3 (커스텀 속성, Grid/Flex 반응형, backdrop-filter 반투명 블러, prefers-color-scheme 다크 모드),
        디자인: Apple 웹 스타일 (시스템 폰트, #F5F5F7 배경, #0071E3 강조, 알약형 버튼, 큰 라운드 카드)
  라이브러리: 없음
*/
:root {
  --bg: #F5F5F7;
  --card: #FFFFFF;
  --surface: #F5F5F7;
  --border: rgba(0, 0, 0, 0.08);
  --fg: #1D1D1F;
  --muted: #6E6E73;
  --accent: #0071E3;
  --accent-hover: #0077ED;
  --accent-soft: rgba(0, 113, 227, 0.1);
  --link: #0066CC;
  --danger: #E30000;
  --glass: rgba(255, 255, 255, 0.72);
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.04);
  --radius: 22px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Apple SD Gothic Neo",
    "Helvetica Neue", Pretendard, sans-serif;
  -webkit-font-smoothing: antialiased;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000; --card: #1C1C1E; --surface: #2C2C2E; --border: rgba(255, 255, 255, 0.1);
    --fg: #F5F5F7; --muted: #A1A1A6; --accent: #0A84FF; --accent-hover: #409CFF;
    --accent-soft: rgba(10, 132, 255, 0.18); --link: #2997FF; --danger: #FF453A;
    --glass: rgba(29, 29, 31, 0.72); --shadow: none;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); letter-spacing: -0.016em; line-height: 1.47; }

/* 최상단 모델·기술 표시: 반투명 블러 바 */
.tech-banner {
  position: sticky; top: 0; z-index: 10;
  background: var(--glass);
  -webkit-backdrop-filter: saturate(180%) blur(20px); backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 8px 16px; display: flex; flex-direction: column; gap: 5px; align-items: center;
}
.tech-row { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 5px; font-size: 12px; }
.tech-label { font-weight: 600; color: var(--muted); margin-right: 4px; }
.chip { background: var(--surface); color: var(--fg); border-radius: 999px; padding: 2px 10px; font-weight: 500; }
.chip-accent { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 16px 16px 72px; }
.nav { display: flex; align-items: center; gap: 12px; min-height: 32px; }
.back { color: var(--link); text-decoration: none; font-size: 15px; }
.back:hover { text-decoration: underline; }
.status { margin-left: auto; font-size: 13px; color: var(--muted); text-align: right; }

.hero { text-align: center; padding: 36px 0 40px; }
.hero h1 {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Apple SD Gothic Neo", sans-serif;
  font-size: clamp(32px, 5vw, 48px); font-weight: 700; letter-spacing: -0.03em; line-height: 1.08; margin: 0;
}
.hero p { font-size: clamp(17px, 2.2vw, 21px); color: var(--muted); margin: 10px 0 0; }

.layout { display: grid; grid-template-columns: 320px 1fr; gap: 20px; align-items: start; }
@media (max-width: 880px) { .layout { grid-template-columns: 1fr; } }
.card { background: var(--card); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); min-width: 0; }
@media (max-width: 480px) { .card { padding: 20px; border-radius: 18px; } .hero { padding: 24px 0 28px; } }
.card h2 { font-size: 24px; margin: 0 0 18px; font-weight: 700; letter-spacing: -0.02em; }

.btn {
  border: 0; border-radius: 980px; padding: 11px 22px; font: inherit; font-size: 15px; font-weight: 500;
  cursor: pointer; text-decoration: none; display: inline-block; transition: background .2s, opacity .2s, transform .1s;
}
.btn:active:not(:disabled) { transform: scale(0.98); }
.btn:disabled { opacity: .35; cursor: default; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn-soft { background: var(--accent-soft); color: var(--accent); }
.btn-soft:hover { filter: brightness(1.05); }
.btn-small { padding: 7px 16px; font-size: 13px; background: var(--accent-soft); color: var(--accent); align-self: flex-start; }
.shortcuts { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 22px; }

.section { margin-top: 36px; scroll-margin-top: 90px; }
.section-title { font-size: 26px; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 16px; }
.section-sub { font-size: 14px; font-weight: 500; color: var(--muted); margin-left: 6px; }

.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 14px; }
.stat { background: var(--card); border-radius: 18px; padding: 20px; box-shadow: var(--shadow); min-height: 118px; }
.stat.skeleton { animation: pulse 1.4s ease-in-out infinite; }
.stat-label { font-size: 13px; color: var(--muted); font-weight: 600; }
.stat-value { font-size: 28px; font-weight: 700; letter-spacing: -0.03em; margin: 6px 0 4px; }
.stat-detail { font-size: 12px; color: var(--muted); line-height: 1.45; }

.prompts h3 { font-size: 17px; margin: 0 0 12px; }
.examples { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.examples button {
  width: 100%; text-align: left; border: 0; border-radius: 12px; background: var(--surface); color: var(--fg);
  font: inherit; font-size: 14px; padding: 11px 14px; cursor: pointer; transition: background .2s, color .2s;
}
.examples button:hover { background: var(--accent-soft); color: var(--accent); }

.ask textarea {
  width: 100%; resize: vertical; border: 1px solid var(--border); border-radius: 14px; padding: 14px 16px;
  font: inherit; font-size: 16px; background: var(--surface); color: var(--fg); transition: box-shadow .2s, background .2s;
}
.ask textarea::placeholder { color: var(--muted); }
.ask textarea:focus { outline: none; background: var(--card); box-shadow: 0 0 0 4px var(--accent-soft); border-color: var(--accent); }
.ask-row { display: flex; justify-content: space-between; align-items: center; margin-top: 10px; gap: 10px; }
.hint { font-size: 13px; color: var(--muted); }
.placeholder { color: var(--muted); font-size: 15px; margin: 24px 0 4px; }

.answers { display: flex; flex-direction: column; margin-top: 8px; }
.qa { border-top: 1px solid var(--border); padding: 22px 0 8px; }
.qa:first-child { margin-top: 14px; }
.qa .q { font-weight: 600; font-size: 18px; letter-spacing: -0.02em; margin-bottom: 10px; }
.qa .q::before { content: "Q  "; color: var(--accent); font-weight: 700; }
.qa .meta { font-size: 12px; color: var(--muted); margin-top: 10px; word-break: break-all; }
.qa.loading .a { color: var(--muted); animation: pulse 1.4s ease-in-out infinite; }
.qa.error .a { color: var(--danger); }
@keyframes pulse { 50% { opacity: .45; } }

.markdown { font-size: 17px; line-height: 1.6; overflow-wrap: anywhere; }
.markdown h1, .markdown h2, .markdown h3 { line-height: 1.25; letter-spacing: -0.02em; margin: 1.1em 0 .45em; }
.markdown h1 { font-size: 24px; } .markdown h2 { font-size: 21px; } .markdown h3 { font-size: 18px; }
.markdown > :first-child { margin-top: 0; }
.markdown p { margin: .55em 0; }
.markdown ul, .markdown ol { padding-left: 1.3em; }
.markdown li { margin: .2em 0; }
.markdown a { color: var(--link); }
.markdown code { background: var(--surface); border-radius: 6px; padding: 1px 6px; font-size: 14px;
  font-family: "SF Mono", ui-monospace, Menlo, monospace; }
.markdown pre { background: var(--surface); border-radius: 14px; padding: 14px; overflow-x: auto; }
.markdown pre code { padding: 0; background: none; }
.markdown blockquote { margin: .6em 0; padding: 2px 14px; border-left: 3px solid var(--accent); color: var(--muted); }
.markdown table { border-collapse: separate; border-spacing: 0; display: block; overflow-x: auto;
  border: 1px solid var(--border); border-radius: 14px; font-size: 15px; }
.markdown th, .markdown td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); }
.markdown tr:last-child td { border-bottom: 0; }
.markdown th { background: var(--surface); font-weight: 600; }

.api-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.api-card { background: var(--card); border-radius: 18px; padding: 20px; box-shadow: var(--shadow);
  display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.api-card h3 { margin: 0; font-size: 17px; }
.api-card code { font-family: "SF Mono", ui-monospace, Menlo, monospace; font-size: 12px; color: var(--muted); word-break: break-all; }
.api-card p { margin: 0; font-size: 13px; color: var(--muted); flex: 1; line-height: 1.5; }
.api-method { align-self: flex-start; font-size: 11px; font-weight: 700; letter-spacing: .04em; color: #1A7F37;
  background: rgba(26, 127, 55, 0.12); border-radius: 6px; padding: 2px 8px; }