/* 2316 MOON_MINESWEEPER — style (kit-swiss 변형 · 극단 미니멀 모노크롬)
 * §6 준수: 평면 솔리드 · 무채 계조 · 1px 헤어라인 · 액센트 잉크 1색. 그라디언트/글래스/글로우/그림자 없음.
 * 지뢰 숫자는 명도 계조(--n1~--n8), 지뢰 폭발·오답 깃발만 빨강 기능색. */

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: 'tnum' 1;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.25; font-weight: 500; letter-spacing: -0.01em; }

.sr-only, .sr-title {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  position: sticky; top: 0; z-index: 20;
}
.header-in { display: flex; align-items: center; gap: 16px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -0.02em; color: var(--ink); font-size: 17px; white-space: nowrap; }
.brand .mark { width: 22px; height: 22px; border: 1px solid var(--accent); border-radius: 3px; display: grid; place-items: center; color: var(--accent-ink); }
.brand .mark svg { width: 14px; height: 14px; }
.header-nav { display: flex; gap: 4px; margin-left: 8px; }
.header-nav a { color: var(--ink-2); padding: 7px 9px; border-radius: 6px; display: inline-flex; align-items: center; }
.header-nav a svg { width: 18px; height: 18px; stroke: currentColor; display: block; }
.header-nav a:hover { color: var(--ink); background: var(--surface-2); text-decoration: none; }
.header-tools { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.icon-btn {
  appearance: none; border: 1px solid var(--line); background: var(--surface-2); color: var(--ink-2);
  height: 34px; min-width: 34px; padding: 0 10px; border-radius: 7px; font: inherit; font-size: 13px; font-weight: 500;
  cursor: pointer; display: inline-flex; align-items: center; gap: 6px;
}
.icon-btn:hover { color: var(--ink); border-color: var(--line-strong); }
.icon-btn[aria-pressed="true"] { color: var(--accent-ink); border-color: var(--accent-line); }
.lang-select { appearance: none; border: 1px solid var(--line); background: var(--surface-2); color: var(--ink-2);
  height: 34px; padding: 0 24px 0 9px; border-radius: 7px; font: inherit; font-size: 16px; font-weight: 500; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239AA1AD' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 8px center; }

/* ---------- Game (index) 레이아웃 ---------- */
.play-main { padding: 20px 0 74px; }
.play-main .wrap { padding: 0 12px; }
.play-area { width: 100%; margin: 0 auto; display: flex; flex-direction: column; align-items: center; gap: 14px; }
.play-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; width: 100%; max-width: 520px; }
.play-top .counter { display: inline-flex; align-items: center; gap: 5px; font-variant-numeric: tabular-nums; font-size: 19px; font-weight: 500; color: var(--ink); min-width: 48px; }
.play-top .counter svg { width: 15px; height: 15px; }
.play-top .counter.mines svg { fill: var(--ink); }
.play-top .diff-label { display: inline-flex; gap: 3px; align-items: center; color: var(--ink-2); }
.play-top .diff-label svg { width: 15px; height: 15px; }
.play-top .timer { font-variant-numeric: tabular-nums; font-size: 19px; color: var(--ink); min-width: 48px; text-align: right; }

/* ---------- Board ---------- */
.board-wrap { position: relative; width: 100%; display: flex; justify-content: center; overflow-x: auto; }
.board {
  display: grid;
  grid-template-columns: repeat(var(--cols, 16), var(--cell));
  grid-auto-rows: var(--cell);
  /* 셀 = min(가로 가능폭, 세로 가능폭) · gap(1px/셀)+여백 보정. 넓은 격자(전문가 30열)도 화면에 맞게 축소 · 상한 42px */
  --cell: clamp(6px, min((100vw - 32px) / var(--cols, 16) - 1px, (100dvh - 300px) / var(--rows, 16) - 1px), 42px);
  gap: 1px;
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
  margin: 0 auto;
  width: max-content; max-width: 100%;
  touch-action: manipulation; user-select: none; -webkit-user-select: none;
}
.cell {
  appearance: none; border: 0; margin: 0; padding: 0;
  width: var(--cell); height: var(--cell); min-width: 0; min-height: 0;
  background: var(--cell-bg); color: var(--ink);
  font: inherit; font-size: calc(var(--cell) * 0.56); font-weight: 600;
  font-variant-numeric: tabular-nums; line-height: 1; cursor: pointer;
  display: grid; place-items: center;
}
.cell:hover { background: var(--surface-2); }
.cell.open { background: var(--cell-open); cursor: default; font-weight: 700; }
.cell.open:hover { background: var(--cell-open); }
.cell.open[data-n] { cursor: pointer; }         /* chord 가능 */
.cell svg { width: calc(var(--cell) * 0.62); height: calc(var(--cell) * 0.62); display: block; }
.cell.flagged { color: var(--flag); }
.cell.mine { color: var(--mine); }
.cell.boom { background: var(--danger-soft); color: var(--danger); }
.cell.wrong { color: var(--danger); position: relative; }
.cell.wrong::after { content: ''; position: absolute; inset: 18%; border-top: 2px solid var(--danger); transform: rotate(45deg); }
.cell.sel { box-shadow: inset 0 0 0 2px var(--accent-line); z-index: 2; }
.cell.hintflash { background: var(--accent-soft); box-shadow: inset 0 0 0 2px var(--accent); }
/* 명도 계조 숫자 */
.cell.n1 { color: var(--n1); } .cell.n2 { color: var(--n2); } .cell.n3 { color: var(--n3); }
.cell.n4 { color: var(--n4); } .cell.n5 { color: var(--n5); } .cell.n6 { color: var(--n6); }
.cell.n7 { color: var(--n7); } .cell.n8 { color: var(--n8); }
.board.flag-mode { cursor: cell; }

/* 일시정지 가림 (블러 없이 솔리드) */
.board-cover {
  position: absolute; inset: 0; background: var(--surface); border: 1px solid var(--line-strong);
  display: grid; place-items: center; text-align: center; color: var(--ink-2); font-weight: 500; font-size: 14px; cursor: pointer; z-index: 5;
}
.board-cover[hidden] { display: none; }

/* ---------- Tools ---------- */
.tools { display: flex; gap: 8px; width: 100%; max-width: 460px; }
.mode-btn {
  appearance: none; border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink);
  font: inherit; font-size: 14px; font-weight: 500; padding: 12px; border-radius: 8px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; flex: 1 1 auto;
}
.mode-btn svg { width: 18px; height: 18px; }
.mode-btn:hover { border-color: var(--accent-line); }
.mode-btn.active { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.tool-btn {
  appearance: none; border: 1px solid var(--line); background: var(--surface); color: var(--ink-2);
  font: inherit; padding: 12px 14px; border-radius: 8px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto;
}
.tool-btn:hover { color: var(--ink); border-color: var(--line-strong); }
.tool-btn svg { width: 20px; height: 20px; stroke: currentColor; }
.tool-btn[data-act="new"] { color: var(--accent-fg); background: var(--accent); border-color: var(--accent); }
.tool-btn[data-act="new"]:hover { filter: brightness(1.06); color: var(--accent-fg); }

/* ---------- FAB · 패널 (형제 공통) ---------- */
.fab-stack { position: fixed; right: 18px; bottom: 54px; display: flex; flex-direction: column; align-items: flex-end; gap: 10px; z-index: 40; }
.fab { appearance: none; border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink);
  width: 46px; height: 46px; padding: 0; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; font: inherit; cursor: pointer; }
.fab svg { width: 20px; height: 20px; stroke: currentColor; flex: 0 0 auto; }
.fab:hover { border-color: var(--accent-line); color: var(--accent-ink); }
.fab-primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.fab-primary:hover { filter: brightness(1.07); color: var(--accent-fg); }

.panel-backdrop { position: fixed; inset: 0; background: rgba(8,10,14,0.32); z-index: 44; }
.panel-backdrop[hidden] { display: none; }
.side-panel { position: fixed; right: 18px; bottom: 54px; width: 300px; max-width: calc(100vw - 36px);
  background: var(--surface); border: 1px solid var(--line-strong); border-radius: 4px; z-index: 45;
  max-height: calc(100vh - 120px); overflow-y: auto; }
.side-panel[hidden] { display: none; }
.panel-head { display: flex; align-items: center; justify-content: space-between; padding: 13px 16px; border-bottom: 1px solid var(--line); }
.panel-head h3 { margin: 0; font-size: 15px; }
.panel-close { appearance: none; border: 0; background: transparent; color: var(--ink-3); font-size: 15px; cursor: pointer; width: 28px; height: 28px; border-radius: 6px; line-height: 1; }
.panel-close:hover { background: var(--surface-2); color: var(--ink); }
.panel-body { padding: 16px; display: flex; flex-direction: column; gap: 18px; }
.set-block { display: flex; flex-direction: column; gap: 8px; }
.set-label { font-size: 13px; font-weight: 500; color: var(--ink-2); }
.row-btns { display: flex; gap: 8px; }
.row-btns .ghost-btn { flex: 1; text-align: center; }
.ghost-btn { appearance: none; border: 1px solid var(--line); background: transparent; color: var(--ink-2);
  font: inherit; font-size: 13px; font-weight: 500; padding: 9px 14px; border-radius: 8px; cursor: pointer; }
.ghost-btn:hover { color: var(--ink); border-color: var(--line-strong); }

/* 세그먼트 난이도 (2×2) */
.seg { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; }
.seg .tab { appearance: none; border: 1px solid var(--line); border-radius: 8px; padding: 9px 8px; font: inherit; font-size: 12px; font-weight: 500; background: var(--surface); color: var(--ink-2); cursor: pointer; display: flex; flex-direction: column; align-items: center; gap: 3px; }
.seg .tab:hover { border-color: var(--accent-line); color: var(--ink); }
.seg .tab.active { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.seg .fires { display: inline-flex; gap: 2px; align-items: center; }
.seg .fires svg { width: 13px; height: 13px; }
.seg .seg-sz { font-size: 10px; opacity: .75; font-variant-numeric: tabular-nums; }

/* 기록 */
.stats { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.stat-row { display: grid; grid-template-columns: 1fr auto auto; gap: 12px; align-items: center; padding: 10px 14px; border-bottom: 1px solid var(--line); font-size: 13px; }
.stat-row:last-child { border-bottom: 0; }
.stat-row .d { font-weight: 500; color: var(--ink); display: inline-flex; align-items: center; gap: 6px; }
.stat-row .d .fires { display: inline-flex; gap: 2px; color: var(--ink-3); }
.stat-row .d .fires svg { width: 12px; height: 12px; }
.stat-row .n { color: var(--ink-2); font-variant-numeric: tabular-nums; text-align: right; min-width: 42px; }
.stat-row .n b { color: var(--ink); font-weight: 500; }
.stat-head { display: grid; grid-template-columns: 1fr auto auto; gap: 12px; padding: 9px 14px; border-bottom: 1px solid var(--line); background: var(--surface); font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-3); }
.stat-head span:not(:first-child) { text-align: right; min-width: 42px; }

/* ---------- 완료 오버레이 ---------- */
.overlay { position: fixed; inset: 0; background: rgba(10,12,16,0.6); display: grid; place-items: center; z-index: 60; padding: 20px; }
:root[data-theme="light"] .overlay { background: rgba(20,22,30,0.4); }
.overlay[hidden] { display: none; }
.overlay-card { background: var(--surface); border: 1px solid var(--line-strong); border-radius: 4px; max-width: 360px; width: 100%; padding: 30px 26px; text-align: center; }
.overlay-card .badge { width: 46px; height: 46px; margin: 0 auto 14px; border: 2px solid var(--accent); border-radius: 10px; display: grid; place-items: center; color: var(--accent-ink); }
.overlay.lose .overlay-card .badge { border-color: var(--danger); color: var(--danger); }
.overlay-card .badge svg { width: 24px; height: 24px; }
.overlay-card h2 { margin: 0 0 6px; font-size: 22px; }
.overlay-card .big-time { font-size: 34px; font-weight: 400; font-variant-numeric: tabular-nums; margin: 8px 0 4px; letter-spacing: -0.02em; }
.overlay-card .ov-time-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-3); }
.overlay-card .ov-meta { color: var(--ink-2); font-size: 13px; margin: 8px 0 20px; }
.overlay-card .btn-primary { appearance: none; border: 0; background: var(--accent); color: var(--accent-fg); font: inherit; font-weight: 500; font-size: 15px; padding: 12px 20px; border-radius: 9px; cursor: pointer; width: 100%; }
.overlay-card .btn-primary:hover { filter: brightness(1.06); }

/* 새 게임 난이도 선택 팝업 */
.ng-diffs { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.ng-diff { display: flex; align-items: center; gap: 12px; padding: 13px 16px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); color: var(--ink); cursor: pointer; font: inherit; text-align: left; }
.ng-diff:hover { border-color: var(--accent-line); background: var(--surface-2); }
.ng-diff .fires { display: inline-flex; gap: 3px; align-items: center; color: var(--ink-2); flex: 0 0 auto; }
.ng-diff .fires svg { width: 16px; height: 16px; }
.ng-diff .ng-name { font-size: 14px; font-weight: 500; }
.ng-diff .ng-sz { margin-left: auto; font-size: 11px; color: var(--ink-3); font-variant-numeric: tabular-nums; }

/* ---------- Ads ---------- */
.ad-wrap { margin: 30px auto 0; }
.ad-grid { display: flex; flex-direction: column; align-items: center; gap: 14px; width: 100%; max-width: 672px; margin: 0 auto; }
.ad-grid[data-ad-layout="mixed"] { max-width: 760px; }
.ad-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; width: 100%; }
.ad-cell { min-height: 50px; }

/* ---------- 콘텐츠 페이지(about/기법/가이드) 공통 ---------- */
main { padding: 26px 0 56px; }
.doc { max-width: 760px; margin: 0 auto; }
.doc h1 { font-size: 30px; margin: 8px 0 6px; letter-spacing: -0.02em; }
.doc .lead { color: var(--ink-2); font-size: 17px; margin: 0 0 26px; }
.doc h2 { font-size: 20px; margin: 34px 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.doc h3 { font-size: 16px; margin: 22px 0 8px; }
.doc p { color: var(--ink); margin: 0 0 14px; }
.doc ul, .doc ol { color: var(--ink); margin: 0 0 16px; padding-left: 22px; }
.doc li { margin: 5px 0; }
.doc .muted { color: var(--ink-2); font-size: 13px; }
.breadcrumb { font-size: 13px; color: var(--ink-3); margin-bottom: 14px; }
.breadcrumb a { color: var(--ink-2); }

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; margin: 20px 0; }
.card { display: block; border: 1px solid var(--line); border-radius: 10px; padding: 16px; background: var(--surface); color: var(--ink); }
.card:hover { border-color: var(--accent-line); text-decoration: none; }
.card .tag { display: inline-block; font-size: 11px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.04em; color: var(--accent-ink); margin-bottom: 6px; }
.card h3 { margin: 0 0 4px; font-size: 15px; }
.card p { margin: 0; color: var(--ink-2); font-size: 13px; }

/* 미니 예시 격자(기법 페이지) */
.mini-board { display: inline-grid; border: 2px solid var(--line-strong); background: var(--line-strong); gap: 1px; margin: 8px 0 18px; }
.mini-board .mc { width: 30px; height: 30px; background: var(--cell-open); display: grid; place-items: center; font-size: 14px; font-weight: 700; font-variant-numeric: tabular-nums; }
.mini-board .mc.unk { background: var(--cell-bg); }
.mini-board .mc.hl { box-shadow: inset 0 0 0 2px var(--accent); }
.mini-board .mc.mine svg, .mini-board .mc.flag svg { width: 18px; height: 18px; }
.mini-board .mc.n1 { color: var(--n1); } .mini-board .mc.n2 { color: var(--n2); } .mini-board .mc.n3 { color: var(--n3); }
.mini-board .mc.n4 { color: var(--n4); } .mini-board .mc.n5 { color: var(--n5); }

.pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 34px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 14px; }
.pager a { font-weight: 500; }

.faq { margin: 20px 0; }
.faq details { border: 1px solid var(--line); border-radius: 9px; margin-bottom: 8px; background: var(--surface); }
.faq summary { padding: 13px 16px; font-weight: 500; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq details[open] summary { border-bottom: 1px solid var(--line); }
.faq .a { padding: 12px 16px; color: var(--ink-2); }

.start-link { display: inline-block; background: var(--accent); color: var(--accent-fg); padding: 11px 20px; border-radius: 8px; font-weight: 500; margin-top: 6px; }
.start-link:hover { filter: brightness(1.06); text-decoration: none; color: var(--accent-fg); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: var(--surface); margin-top: 50px; }
.footer-in { padding: 30px 0; display: grid; gap: 18px; }
.footer-cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 22px; }
.footer-cols h4 { margin: 0 0 10px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-3); }
.footer-cols a { display: block; color: var(--ink-2); font-size: 13px; padding: 3px 0; }
.footer-cols a:hover { color: var(--ink); text-decoration: none; }
.copyright { color: var(--ink-3); font-size: 12px; border-top: 1px solid var(--line); padding-top: 16px; }

/* 미니 푸터 (게임 전용 · 하단 고정) */
.site-footer.mini { position: fixed; left: 0; right: 0; bottom: 0; margin: 0; border-top: 1px solid var(--line); background: var(--surface); z-index: 30; }
.site-footer.mini .copyright { border: 0; padding: 10px 20px; text-align: center; }

/* RTL: FAB·패널 왼쪽 하단 */
[dir="rtl"] .fab-stack, [dir="rtl"] .side-panel { right: auto; left: 18px; }
[dir="rtl"] .fab-stack { align-items: flex-start; }
[dir="rtl"] .play-top .pausewrap { margin-left: 0; margin-right: auto; }

/* 반응형 */
@media (max-width: 600px) {
  .header-nav { display: none; }
  .header-in { gap: 10px; height: 54px; }
}
@media (max-width: 560px) {
  .fab-stack { right: 12px; bottom: 48px; }
  .side-panel { right: 12px; left: 12px; width: auto; }
  [dir="rtl"] .side-panel { left: 12px; right: 12px; }
}

.center { text-align: center; }
.muted { color: var(--ink-2); font-size: 13px; }