/* ============================================================
   숫자야구 전용 스타일
   - 공통 종이색 위에 "야구 기록지 + 전광판" 감성을 얹는다.
   - 스트라이크는 주묵색(빨강), 볼은 따뜻한 호박색으로 구분.
   - 숫자는 tabular 정렬 고정폭으로 기록지처럼 또박또박.
   ============================================================ */

:root {
  --nb-ball: #c8811f;          /* 볼: 따뜻한 호박색(종이 톤과 어울림) */
  --nb-ball-weak: #f3e6cf;
  --nb-strike: var(--color-primary);
  --nb-ink: var(--color-text);
  --nb-line: rgba(194, 59, 48, .16);   /* 다이아몬드 라인(옅은 주묵) */
}
:root[data-theme="dark"] {
  --nb-ball: #e0a94a;
  --nb-ball-weak: #3a2f1c;
  --nb-line: rgba(224, 87, 74, .18);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --nb-ball: #e0a94a;
    --nb-ball-weak: #3a2f1c;
    --nb-line: rgba(224, 87, 74, .18);
  }
}

/* ---- 도입부 ---- */
.tool-intro { padding: clamp(30px, 5vw, 56px) 0 clamp(18px, 3vw, 30px); }
.tool-intro h1 { margin: 0 0 var(--space-4); }
.tool-intro .lead {
  font-size: 1.08rem; line-height: 1.75; color: var(--color-text-sub);
  max-width: 56ch; margin: 0;
}
.tool-intro .lead strong { color: var(--color-text); }
.tool-intro .lead-note { margin: var(--space-3) 0 0; font-size: .88rem; color: var(--color-text-sub); }

/* ---- 설정 ---- */
.nb-controls { padding: var(--space-4) var(--space-5); margin-bottom: var(--space-4); }
.nb-field { display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; }
.nb-lab { font-size: .95rem; font-weight: 700; color: var(--color-text-sub); min-width: 56px; }
.nb-chips { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.nb-chip {
  font: inherit; font-size: 1rem; cursor: pointer; touch-action: manipulation;
  padding: 9px 18px; border-radius: 999px;
  border: 1.5px solid var(--color-border); background: var(--color-surface); color: var(--color-text);
}
.nb-chip:hover { border-color: var(--color-primary); }
.nb-chip[aria-pressed="true"] {
  background: var(--color-primary); border-color: var(--color-primary); color: #fff; font-weight: 700;
}
.nb-actions { margin-left: auto; }

.nb-btn {
  font: inherit; font-size: .98rem; font-weight: 700; cursor: pointer; touch-action: manipulation;
  padding: 9px 16px; border-radius: 999px;
  border: 1.5px solid var(--color-border); background: var(--color-surface); color: var(--color-text);
}
.nb-btn:hover:not(:disabled) { border-color: var(--color-primary); color: var(--color-primary); }
.nb-btn:active:not(:disabled) { transform: scale(.97); }
.nb-btn:disabled { opacity: .45; cursor: default; }
.nb-btn-ghost { border-style: dashed; font-weight: 400; color: var(--color-text-sub); }

/* ---- 상태 줄 ---- */
.nb-stage { max-width: 560px; margin: 0 auto; }
.nb-status {
  display: flex; align-items: center; justify-content: center;
  gap: var(--space-5); margin-bottom: var(--space-4); flex-wrap: wrap;
}
.nb-stat { font-size: .95rem; color: var(--color-text-sub); font-variant-numeric: tabular-nums; }
.nb-stat b { font-size: 1.3rem; color: var(--color-text); margin-left: 4px; }

/* ---- 게임판 ---- */
.nb-board-wrap { position: relative; display: grid; }
.nb-board {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: clamp(18px, 4vw, 30px) clamp(14px, 3vw, 26px) clamp(16px, 3vw, 24px);
  overflow: hidden;
}
/* 배경 모티프: 야구 내야 다이아몬드(옅은 주묵 라인) */
.nb-board::before {
  content: "";
  position: absolute;
  width: 300px; height: 300px;
  left: 50%; top: -70px;
  transform: translateX(-50%) rotate(45deg);
  border: 2px solid var(--nb-line);
  border-radius: 10px;
  pointer-events: none;
}
.nb-board > * { position: relative; }

/* 입력 슬롯 = 전광판 자리 */
.nb-slots {
  display: flex; justify-content: center; gap: clamp(8px, 2.4vw, 14px);
  margin-bottom: clamp(16px, 3.5vw, 24px);
}
.nb-slot {
  display: flex; align-items: center; justify-content: center;
  width: clamp(52px, 15vw, 68px); height: clamp(64px, 18vw, 82px);
  border: 2px solid var(--color-border);
  border-bottom: 4px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg);
  font-size: clamp(2rem, 8vw, 2.8rem); font-weight: 800;
  font-variant-numeric: tabular-nums; letter-spacing: 0;
  color: var(--nb-ink); line-height: 1;
}
.nb-slot.is-filled { border-color: var(--color-primary); border-bottom-color: var(--color-primary); }
.nb-slot.is-next {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-weak);
}
.nb-slots.is-bad { animation: nb-shake .3s ease; }
@keyframes nb-shake { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-6px)} 75%{transform:translateX(6px)} }

/* 숫자판: 3열 그리드 */
.nb-pad {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: clamp(7px, 1.8vw, 10px);
  max-width: 320px; margin: 0 auto;
}
.nb-key {
  font: inherit; font-size: clamp(1.3rem, 5vw, 1.6rem); font-weight: 700;
  cursor: pointer; touch-action: manipulation; -webkit-tap-highlight-color: transparent;
  font-variant-numeric: tabular-nums;
  padding: clamp(10px, 2.6vw, 15px) 0; border-radius: 12px;
  border: 1.5px solid var(--color-border); background: var(--color-surface); color: var(--color-text);
  transition: transform .1s ease, border-color .12s ease, background .12s ease;
}
.nb-key:hover:not(:disabled) { border-color: var(--color-primary); }
.nb-key:active:not(:disabled) { transform: scale(.95); background: var(--color-primary-weak); }
.nb-key:disabled { opacity: .34; cursor: default; }
.nb-key.is-used {
  opacity: 1; background: var(--color-primary); border-color: var(--color-primary); color: #fff;
}
.nb-key-sub { font-size: clamp(.9rem, 3vw, 1rem); font-weight: 700; color: var(--color-text-sub); }

.nb-pad-actions {
  display: flex; flex-direction: column; align-items: center; gap: var(--space-3);
  margin-top: clamp(16px, 3.5vw, 22px);
}
.nb-btn-big {
  font: inherit; font-size: 1.2rem; font-weight: 700; cursor: pointer; touch-action: manipulation;
  padding: 14px 48px; border-radius: 999px; border: 0;
  background: var(--color-primary); color: #fff; box-shadow: var(--shadow);
  transition: filter .12s ease, transform .1s ease;
}
.nb-btn-big:hover:not(:disabled) { filter: brightness(1.06); }
.nb-btn-big:active:not(:disabled) { transform: scale(.97); }
.nb-btn-big:disabled { opacity: .4; cursor: default; box-shadow: none; }

/* ---- 안내 문구 ---- */
.nb-msg {
  min-height: 1.6em; margin: var(--space-3) 0 0; text-align: center;
  font-size: .98rem; font-weight: 700; color: var(--color-text);
}
.nb-msg.is-warn { color: var(--color-primary); }

/* ---- 오버레이(승리) ---- */
.nb-board-wrap > .nb-overlay,
.nb-board-wrap > .nb-board { grid-area: 1 / 1; }
.nb-overlay {
  display: flex; align-items: center; justify-content: center; z-index: 3;
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--color-bg) 86%, transparent);
  -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px);
}
@supports not (background: color-mix(in srgb, red 50%, transparent)) {
  .nb-overlay { background: var(--color-bg); }
}
.nb-overlay-panel { text-align: center; padding: var(--space-5); }
.nb-ov-title {
  margin: 0 0 var(--space-2); font-family: var(--font-serif);
  font-size: 1.6rem; font-weight: 700; color: var(--color-text);
}
.nb-ov-num {
  margin: 0 0 var(--space-3); font-size: clamp(3rem, 14vw, 4.4rem); font-weight: 800;
  font-variant-numeric: tabular-nums; letter-spacing: .06em; color: var(--color-primary); line-height: 1;
}
.nb-ov-line { margin: 0 0 var(--space-1); font-size: 1rem; color: var(--color-text-sub); }
.nb-ov-line b { color: var(--color-text); font-size: 1.4rem; }
.nb-ov-best { margin: 0 0 var(--space-4); font-size: .95rem; color: var(--color-text-sub); min-height: 1.2em; }
.nb-new { color: var(--color-primary); font-weight: 700; }

/* ============================================================
   두 칸: 기록지 + 추론 도우미
   ============================================================ */
.nb-columns {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4);
  max-width: 720px; margin: clamp(24px, 4vw, 36px) auto 0;
}
.nb-panel {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius); box-shadow: var(--shadow-sm);
  padding: var(--space-4) var(--space-5);
}
.nb-panel-h {
  margin: 0 0 var(--space-3); font-family: var(--font-serif);
  font-size: 1.15rem; font-weight: 700;
  padding-bottom: var(--space-2); border-bottom: 2px solid var(--color-text);
}

/* ---- 기록지 ---- */
.nb-log-head, .nb-row {
  display: grid; grid-template-columns: 28px 1fr auto; align-items: center; gap: var(--space-2);
}
.nb-log-head {
  font-size: .78rem; font-weight: 700; letter-spacing: .04em; color: var(--color-text-sub);
  padding-bottom: 6px; border-bottom: 1px solid var(--color-border); margin-bottom: 4px;
}
.nb-log { display: flex; flex-direction: column; }
.nb-row {
  padding: 7px 0; border-bottom: 1px dashed var(--color-border);
  animation: nb-in .22s ease;
}
@keyframes nb-in { from { opacity: 0; transform: translateY(-5px); } to { opacity: 1; transform: none; } }
.nb-no { font-size: .82rem; color: var(--color-text-sub); font-variant-numeric: tabular-nums; }
.nb-guess { display: flex; gap: 4px; }
.nb-d {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 1.5em; font-size: 1.2rem; font-weight: 700;
  font-variant-numeric: tabular-nums; color: var(--nb-ink);
}
.nb-res { display: flex; gap: 5px; justify-content: flex-end; }
.nb-badge {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 2.1em; padding: 3px 8px; border-radius: 999px;
  font-size: .82rem; font-weight: 800; font-variant-numeric: tabular-nums;
}
.nb-strike { background: var(--color-primary); color: #fff; }
.nb-ball { background: var(--nb-ball-weak); color: var(--nb-ball); border: 1.5px solid var(--nb-ball); }
.nb-out { background: transparent; color: var(--color-text-sub); border: 1.5px dashed var(--color-border); font-weight: 700; }
.nb-log-empty { margin: var(--space-3) 0 0; font-size: .88rem; color: var(--color-text-sub); }

/* ---- 추론 도우미 ---- */
.nb-cand { margin: 0; display: flex; align-items: baseline; gap: 6px; }
.nb-cand-num {
  font-size: 2.2rem; font-weight: 800; font-variant-numeric: tabular-nums;
  color: var(--color-primary); line-height: 1; font-family: var(--font-serif);
}
.nb-cand-unit { font-size: .95rem; color: var(--color-text-sub); }
.nb-cand-note { margin: var(--space-2) 0 var(--space-4); font-size: .85rem; color: var(--color-text-sub); line-height: 1.5; }

.nb-clue-lab, .nb-cand-list-lab {
  margin: 0 0 var(--space-2); font-size: .82rem; font-weight: 700;
  letter-spacing: .04em; color: var(--color-text-sub);
}
.nb-clues { display: flex; flex-wrap: wrap; gap: 5px; }
.nb-clue {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 7px;
  font-size: 1rem; font-weight: 700; font-variant-numeric: tabular-nums;
  border: 1.5px solid var(--color-border); background: var(--color-surface); color: var(--color-text);
}
.nb-clue.is-required { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.nb-clue.is-excluded { opacity: .38; text-decoration: line-through; }
.nb-clue-legend { display: flex; flex-wrap: wrap; gap: var(--space-3); margin: var(--space-2) 0 var(--space-4); }
.nb-lg { font-size: .76rem; color: var(--color-text-sub); display: inline-flex; align-items: center; gap: 5px; }
.nb-lg::before { content: ""; width: 12px; height: 12px; border-radius: 4px; }
.nb-lg-req::before { background: var(--color-primary); }
.nb-lg-exc::before { border: 1.5px solid var(--color-border); opacity: .5; }
.nb-lg-mid::before { border: 1.5px solid var(--color-border); }

.nb-hint-toggle { width: 100%; }
.nb-hint { margin-top: var(--space-4); }
.nb-rec {
  background: var(--color-primary-weak); border: 1px solid transparent;
  border-radius: var(--radius-sm); padding: var(--space-3) var(--space-4); margin-bottom: var(--space-4);
  text-align: center;
}
.nb-rec-lab { font-size: .78rem; font-weight: 700; letter-spacing: .04em; color: var(--color-primary); }
.nb-rec-num {
  display: block; font-size: 2rem; font-weight: 800; font-variant-numeric: tabular-nums;
  letter-spacing: .08em; color: var(--color-primary); margin: 2px 0;
}
.nb-rec-note { margin: 0; font-size: .82rem; color: var(--color-text-sub); line-height: 1.5; }
.nb-cand-list {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 5px;
  max-height: 220px; overflow-y: auto;
}
.nb-cand-list li {
  font-size: .95rem; font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: .04em;
  padding: 4px 9px; border-radius: 6px;
  background: var(--color-bg); border: 1px solid var(--color-border); color: var(--color-text);
}
.nb-cand-more { margin: var(--space-2) 0 0; font-size: .8rem; color: var(--color-text-sub); }

/* ---- 본문 ---- */
.prose { max-width: 720px; margin: clamp(40px, 6vw, 64px) auto 0; }
.prose h2 { margin: 0 0 var(--space-3); }
.prose p { margin: 0 0 var(--space-3); color: var(--color-text); }
.prose ul { margin: 0; padding-left: 1.2em; }
.prose li { margin-bottom: var(--space-2); }
.prose li strong { color: var(--color-text); }

@media (prefers-reduced-motion: reduce) {
  .nb-key, .nb-btn-big { transition: none; }
  .nb-slots.is-bad, .nb-row { animation: none; }
}

@media (max-width: 620px) {
  .nb-columns { grid-template-columns: 1fr; }
}
@media (max-width: 440px) {
  .nb-lab { min-width: 100%; }
  .nb-actions { margin-left: 0; }
  .nb-status { gap: var(--space-4); }
}