/* =========================================================
   신페리오 계산기 — 스코어카드 디자인 시스템
   팔레트: 핀-플래그 위의 스코어카드
   ========================================================= */
:root {
  --ink: #1B3A2B;        /* 잉크 파인그린: 구조·헤딩·룰 */
  --fairway: #2F5E43;    /* 미드 페어웨이그린: 보조 */
  --paper: #FAFAF7;      /* 초크 페이퍼: 배경 */
  --card: #F1F0E9;       /* 카드스톡: 카드/패널 */
  --card-line: #E3E1D6;  /* 룰드 헤어라인 */
  --flag: #C4452F;       /* 핀-플래그 레드: 단일 액센트 */
  --flag-soft: #F3E0DB;  /* 액센트 연한 배경 */
  --graphite: #3A3A38;   /* 연필 스코어 */
  --muted: #6B6E66;      /* 보조 텍스트 */
  --shadow: 0 1px 2px rgba(27, 58, 43, .08), 0 6px 20px rgba(27, 58, 43, .06);
  --shadow-sm: 0 1px 2px rgba(27, 58, 43, .10);
  --radius: 3px;
  --radius-lg: 4px;
  --sans: "Space Grotesk", "IBM Plex Sans KR", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Menlo, monospace;
  --maxw: 1080px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.68;
  font-size: 16px;
  letter-spacing: -0.005em;
}
h1, h2, h3, h4 { font-family: var(--sans); font-weight: 600; color: var(--ink); line-height: 1.25; letter-spacing: -0.02em; }
a { color: var(--fairway); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }

/* Tabular numbers everywhere numeric matters */
.num, .mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }

/* ---------- NAV ---------- */
.top-nav {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 10px;
  max-width: var(--maxw); margin: 0 auto; padding: 14px 20px;
}
.brand {
  display: inline-flex; align-items: center; gap: 9px;
  font-weight: 600; font-size: 1.02rem; color: var(--ink);
}
.brand:hover { text-decoration: none; }
.brand svg { color: var(--flag); flex: none; }
.model-tag {
  font-family: var(--mono); font-size: .64rem; letter-spacing: .06em;
  color: var(--muted); border: 1px solid var(--card-line);
  padding: 2px 6px; border-radius: var(--radius); background: var(--card);
}
.nav-links { display: flex; flex-wrap: wrap; gap: 4px 6px; align-items: center; }
.nav-links a {
  font-size: .9rem; color: var(--fairway); padding: 6px 10px;
  border-radius: var(--radius);
}
.nav-links a:hover { background: var(--card); text-decoration: none; }
.nav-links a.cta { color: #fff; background: var(--flag); font-weight: 600; }
.nav-links a.cta:hover { background: #a83a26; }

/* ruled strip under nav = scorecard rule line */
.ruler-strip {
  height: 6px; max-width: var(--maxw); margin: 0 auto;
  background:
    repeating-linear-gradient(90deg, var(--card-line) 0 1px, transparent 1px 28px);
  border-top: 1px solid var(--ink);
  opacity: .55;
}

/* ---------- LAYOUT ---------- */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px 64px; }
.container.wide { max-width: var(--maxw); padding-bottom: 0; }

.hero, .page-header { padding: 40px 0 22px; }
.eyebrow {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--flag); margin: 0 0 12px;
}
.hero h1 { font-size: clamp(1.7rem, 5.2vw, 2.5rem); margin: 0 0 14px; }
.page-header h1 { font-size: clamp(1.5rem, 4.6vw, 2.1rem); margin: 0 0 12px; }
.hero-lede, .sub { font-size: 1.05rem; color: var(--graphite); margin: 0; max-width: 62ch; }
.hero-lede b, .sub b { color: var(--ink); font-weight: 600; }

/* ---------- PANEL ---------- */
.panel {
  background: var(--card); border: 1px solid var(--card-line);
  border-radius: var(--radius-lg); box-shadow: var(--shadow);
  overflow: hidden;
}
.panel-head {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px; border-bottom: 1px solid var(--card-line);
  background: var(--ink);
}
.panel-head h2 { color: var(--paper); font-size: 1rem; margin: 0; flex: 1; }
.panel-head .stud {
  width: 10px; height: 10px; border-radius: 50%; flex: none;
  background: var(--flag); box-shadow: 0 0 0 3px rgba(196,69,47,.25);
}
.panel-head .tag {
  font-family: var(--mono); font-size: .62rem; letter-spacing: .1em;
  color: var(--paper); border: 1px solid rgba(250,250,247,.4);
  padding: 2px 7px; border-radius: var(--radius);
}
.calc-body { padding: 18px; }

/* ---------- TABS ---------- */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--card-line); margin-bottom: 18px; flex-wrap: wrap; }
.tabs button {
  font-family: var(--sans); font-size: .92rem; font-weight: 500;
  border: 1px solid transparent; border-bottom: none;
  background: transparent; color: var(--muted);
  padding: 10px 14px; cursor: pointer; border-radius: var(--radius) var(--radius) 0 0;
  position: relative; top: 1px;
}
.tabs button small { display: block; font-size: .68rem; color: var(--muted); font-weight: 400; margin-top: 1px; }
.tabs button.active {
  color: var(--ink); background: var(--paper);
  border-color: var(--card-line); border-bottom: 1px solid var(--paper);
}
.tabs button.active::before {
  content: ""; position: absolute; left: 0; right: 0; top: -1px; height: 2px;
  background: var(--flag); border-radius: 2px;
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------- FIELDS ---------- */
.field-row { display: flex; flex-wrap: wrap; gap: 14px; align-items: flex-end; margin-bottom: 16px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field label { font-size: .8rem; font-weight: 500; color: var(--fairway); }
.field .hint { font-weight: 400; color: var(--muted); font-size: .74rem; }
input[type="number"], input[type="text"], select {
  font-family: var(--mono); font-size: .95rem; color: var(--graphite);
  background: var(--paper); border: 1px solid var(--card-line);
  border-radius: var(--radius); padding: 8px 10px; width: 100%;
}
input[type="text"] { font-family: var(--sans); }
input:focus, select:focus { outline: 2px solid var(--flag); outline-offset: 0; border-color: var(--flag); }
.par-input { max-width: 120px; }

/* ---------- SCORECARD GRID ---------- */
.scorecard { overflow-x: auto; border: 1px solid var(--ink); border-radius: var(--radius); background: var(--paper); }
.scorecard table { border-collapse: collapse; width: 100%; min-width: 640px; }
.scorecard th, .scorecard td {
  border: 1px solid var(--card-line); padding: 0; text-align: center;
  font-family: var(--mono); font-variant-numeric: tabular-nums;
}
.scorecard thead th {
  background: var(--ink); color: var(--paper); font-weight: 500;
  font-size: .72rem; padding: 7px 2px; letter-spacing: .02em;
}
.scorecard .rowlabel {
  background: var(--card); color: var(--fairway); font-weight: 500;
  font-size: .74rem; text-align: left; padding: 6px 8px; white-space: nowrap;
  font-family: var(--sans); position: sticky; left: 0; z-index: 2;
}
.scorecard td.sum, .scorecard th.sum {
  background: var(--card); color: var(--ink); font-weight: 600;
}
.scorecard input {
  border: none; background: transparent; text-align: center;
  width: 100%; min-width: 34px; padding: 7px 2px; border-radius: 0;
  font-family: var(--mono); font-size: .9rem; color: var(--graphite);
}
.scorecard input:focus { outline: 2px solid var(--flag); outline-offset: -2px; }
.scorecard .par-cell input { color: var(--fairway); }
/* designated-hole pin-flag marker */
.scorecard th.designated { position: relative; background: var(--flag); }
.scorecard th.designated::after {
  content: "▸"; position: absolute; top: 1px; right: 2px; font-size: .6rem; color: #fff;
}
.desig-toggle { cursor: pointer; }
.scorecard td.desig-cell { background: var(--flag-soft); }
.chk-row td { padding: 3px 0; }
.chk-row input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--flag); cursor: pointer; }

.grid-hint { font-size: .78rem; color: var(--muted); margin: 8px 2px 0; }
.grid-hint.warn { color: var(--flag); font-weight: 500; }
.grid-hint.ok { color: var(--fairway); }

.mini-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.btn {
  font-family: var(--sans); font-size: .88rem; font-weight: 500;
  border: 1px solid var(--card-line); background: var(--paper); color: var(--fairway);
  padding: 8px 14px; border-radius: var(--radius); cursor: pointer;
}
.btn:hover { background: var(--card); }
.btn-primary { background: var(--flag); color: #fff; border-color: var(--flag); }
.btn-primary:hover { background: #a83a26; }
.btn-ghost { background: transparent; }

/* ---------- RESULT ---------- */
.result-strip {
  display: flex; flex-wrap: wrap; gap: 12px; margin-top: 18px;
}
.result-card {
  flex: 1 1 130px; background: var(--paper); border: 1px solid var(--card-line);
  border-radius: var(--radius); padding: 14px 16px; text-align: center;
}
.result-card.flagged { border-color: var(--flag); background: var(--flag-soft); }
.result-card .rc-label { font-size: .72rem; color: var(--muted); letter-spacing: .04em; text-transform: uppercase; }
.result-card .rc-value {
  font-family: var(--mono); font-variant-numeric: tabular-nums;
  font-size: 1.9rem; font-weight: 600; color: var(--ink); line-height: 1.1; margin-top: 4px;
}
.result-card.flagged .rc-value { color: var(--flag); }
.result-note { font-size: .8rem; color: var(--muted); margin-top: 10px; }

/* ---------- LEADERBOARD ---------- */
.lb-add { display: flex; flex-wrap: wrap; gap: 8px; align-items: flex-end; margin-bottom: 14px; }
.lb-add .field { flex: 1 1 140px; }
.leaderboard { overflow-x: auto; border: 1px solid var(--ink); border-radius: var(--radius); }
.leaderboard table { border-collapse: collapse; width: 100%; min-width: 460px; }
.leaderboard th, .leaderboard td {
  padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--card-line);
}
.leaderboard thead th { background: var(--ink); color: var(--paper); font-size: .78rem; font-weight: 500; }
.leaderboard td.n, .leaderboard th.n { text-align: right; font-family: var(--mono); font-variant-numeric: tabular-nums; }
.leaderboard tbody tr:nth-child(odd) { background: var(--card); }
.leaderboard tbody tr.top { background: var(--flag-soft); }
.rank-pin { color: var(--flag); font-weight: 700; }
.lb-empty { padding: 22px; text-align: center; color: var(--muted); font-size: .9rem; }
.tie-tag { font-family: var(--mono); font-size: .66rem; color: var(--flag); margin-left: 4px; }

/* ---------- MINI COMPARE TABLE ---------- */
.data-table { overflow-x: auto; border: 1px solid var(--card-line); border-radius: var(--radius); margin: 16px 0; }
.data-table table { border-collapse: collapse; width: 100%; min-width: 480px; }
.data-table th, .data-table td { padding: 10px 12px; border-bottom: 1px solid var(--card-line); text-align: left; font-size: .9rem; }
.data-table thead th { background: var(--ink); color: var(--paper); font-weight: 500; }
.data-table tbody tr:nth-child(even) { background: var(--card); }
.data-table .mono, .data-table td.num { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.data-table caption { text-align: left; font-size: .78rem; color: var(--muted); padding: 8px 2px; caption-side: bottom; }

/* ---------- SECTIONS / PROSE ---------- */
section { margin-top: 40px; }
section > h2 {
  font-size: 1.35rem; margin: 0 0 14px; padding-bottom: 8px;
  border-bottom: 2px solid var(--ink); display: inline-block;
}
.prose h2 { font-size: 1.3rem; margin: 34px 0 12px; }
.prose h3 { font-size: 1.08rem; margin: 24px 0 8px; color: var(--fairway); }
.prose p { margin: 0 0 14px; color: var(--graphite); }
.prose ul, .prose ol { margin: 0 0 16px; padding-left: 22px; color: var(--graphite); }
.prose li { margin-bottom: 6px; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose code, .formula {
  font-family: var(--mono); background: var(--card); border: 1px solid var(--card-line);
  border-radius: var(--radius); padding: 2px 6px; font-size: .88rem; color: var(--ink);
}
.formula-block {
  font-family: var(--mono); background: var(--ink); color: var(--paper);
  border-radius: var(--radius); padding: 14px 16px; margin: 14px 0;
  overflow-x: auto; font-size: .9rem; line-height: 1.7;
}
.formula-block .accent { color: #F0A99B; }

.callout {
  border-left: 3px solid var(--flag); background: var(--flag-soft);
  padding: 12px 16px; border-radius: 0 var(--radius) var(--radius) 0; margin: 16px 0;
  font-size: .92rem; color: var(--graphite);
}
.callout strong { color: var(--ink); }

.steps { counter-reset: step; list-style: none; padding: 0; margin: 16px 0; }
.steps li { position: relative; padding: 4px 0 12px 40px; margin: 0; border-left: 1px solid var(--card-line); margin-left: 14px; }
.steps li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: -14px; top: 2px; width: 28px; height: 28px;
  background: var(--ink); color: var(--paper); border-radius: 50%;
  display: grid; place-items: center; font-family: var(--mono); font-size: .82rem; font-weight: 600;
}
.steps li:last-child { border-left-color: transparent; }

.src { font-size: .78rem; color: var(--muted); }
.src a { color: var(--muted); text-decoration: underline; }
.disclaimer { font-size: .82rem; color: var(--muted); background: var(--card); border: 1px solid var(--card-line); border-radius: var(--radius); padding: 12px 14px; margin: 20px 0; }

/* ---------- COUPANG ---------- */
.cp-slot { margin-top: 18px; }
.cp-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; margin-top: 12px; }
.cp-link {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  background: var(--paper); border: 1px solid var(--card-line); border-radius: var(--radius);
  padding: 11px 14px; color: var(--ink); font-size: .9rem; font-weight: 500;
}
.cp-link:hover { border-color: var(--flag); text-decoration: none; background: var(--flag-soft); }
.cp-link .arrow { color: var(--flag); font-family: var(--mono); }
.cp-note { font-size: .74rem; color: var(--muted); margin-top: 8px; }

/* ---------- INTERNAL LINK CARDS ---------- */
.link-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin-top: 14px; }
.link-card {
  display: block; background: var(--card); border: 1px solid var(--card-line);
  border-radius: var(--radius); padding: 16px; color: var(--ink);
}
.link-card:hover { border-color: var(--flag); text-decoration: none; box-shadow: var(--shadow-sm); }
.link-card h3 { font-size: 1rem; margin: 0 0 6px; }
.link-card p { font-size: .85rem; color: var(--muted); margin: 0; }
.link-card .go { font-family: var(--mono); font-size: .78rem; color: var(--flag); margin-top: 8px; display: inline-block; }

/* ---------- FAQ ---------- */
.faq-item { border-bottom: 1px solid var(--card-line); padding: 18px 0; }
.faq-item h3 { font-size: 1.05rem; margin: 0 0 8px; color: var(--ink); }
.faq-item h3::before { content: "Q. "; color: var(--flag); font-family: var(--mono); }
.faq-item p { margin: 0 0 8px; color: var(--graphite); }
.faq-item .fa-link { font-size: .84rem; }

/* ---------- CTA BANNER ---------- */
.cta-banner {
  background: var(--ink); color: var(--paper); border-radius: var(--radius-lg);
  padding: 22px 24px; margin: 32px 0; display: flex; flex-wrap: wrap;
  align-items: center; justify-content: space-between; gap: 14px;
}
.cta-banner h3 { color: var(--paper); margin: 0 0 4px; font-size: 1.1rem; }
.cta-banner p { margin: 0; color: rgba(250,250,247,.8); font-size: .9rem; }
.cta-banner a.btn-primary { flex: none; }

/* ---------- FOOTER ---------- */
footer { background: var(--ink); color: var(--paper); margin-top: 60px; }
footer .container { padding-top: 40px; padding-bottom: 28px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 22px; }
.footer-col h4 { color: var(--paper); font-size: .82rem; letter-spacing: .06em; text-transform: uppercase; margin: 0 0 10px; opacity: .7; }
.footer-col a { display: block; color: rgba(250,250,247,.85); font-size: .88rem; padding: 3px 0; }
.footer-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(250,250,247,.15); margin-top: 26px; padding-top: 18px; }
.footer-bottom p { margin: 0 0 4px; font-size: .82rem; color: rgba(250,250,247,.7); }
.footer-plate { font-family: var(--mono); font-size: .7rem !important; letter-spacing: .04em; color: rgba(250,250,247,.5) !important; }
.footer-plate a { color: rgba(250,250,247,.7); }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 640px) {
  body { font-size: 15px; }
  .calc-body { padding: 14px; }
  .hero, .page-header { padding: 28px 0 18px; }
  .result-card .rc-value { font-size: 1.6rem; }
  .nav-links { width: 100%; }
}

/* subtle count-up transition for results (functional motion) */
.rc-value { transition: color .2s ease; }
.tab-panel.active { animation: fadein .18s ease; }
@keyframes fadein { from { opacity: 0; transform: translateY(3px); } to { opacity: 1; transform: none; } }
.leaderboard tbody tr { transition: background .2s ease; }