/* ============================================================
   숫자 외우기 게임(digit span) 전용 스타일
   - 사이먼 게임과 같은 계열: 밝고 순한 느낌, 고대비, 큰 활자
   - 패널 테두리 색으로 "지금이 어느 차례인지"를 게임판 자체가 입는다
     (외울 차례: 호박색 / 입력할 차례: 초록 / 틀림: 붉은색)
   ============================================================ */

:root {
  --ds-turn-watch-bg: #f5e3c8;  --ds-turn-watch-fg: #7a5410;
  --ds-turn-input-bg: #d9edda;  --ds-turn-input-fg: #1d5f2a;
  --ds-frame-show: #e3b463;
  --ds-frame-input: #4da362;
  --ds-frame-fail: #d4675a;
  --ds-ok: #2e7d3c;
  --ds-bad: #c0392b;
  --ds-bad-weak: #f6dcd6;
  --ds-slot-line: #b9ad94;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ds-turn-watch-bg: #4a3a17;  --ds-turn-watch-fg: #f2d9a4;
    --ds-turn-input-bg: #1e3d24;  --ds-turn-input-fg: #b9e5c0;
    --ds-frame-show: #a3782c;
    --ds-frame-input: #4d9760;
    --ds-frame-fail: #b05548;
    --ds-ok: #7fd694;
    --ds-bad: #ff8f7d;
    --ds-bad-weak: #4a231c;
    --ds-slot-line: #5d5443;
  }
}
:root[data-theme="dark"] {
  --ds-turn-watch-bg: #4a3a17;  --ds-turn-watch-fg: #f2d9a4;
  --ds-turn-input-bg: #1e3d24;  --ds-turn-input-fg: #b9e5c0;
  --ds-frame-show: #a3782c;
  --ds-frame-input: #4d9760;
  --ds-frame-fail: #b05548;
  --ds-ok: #7fd694;
  --ds-bad: #ff8f7d;
  --ds-bad-weak: #4a231c;
  --ds-slot-line: #5d5443;
}

/* ---- 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: 52ch;
  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 줄 ---- */
.ds-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3) var(--space-5);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-4);
}
.ds-field { display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; }
.ds-lab { font-size: .95rem; font-weight: 700; color: var(--color-text-sub); }
.ds-field-note {
  flex-basis: 100%;
  font-size: .85rem;
  color: var(--color-text-sub);
}
.ds-chips { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.ds-chip {
  font: inherit;
  font-size: 1rem;
  cursor: pointer;
  touch-action: manipulation;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}
.ds-chip small {
  font-size: .78em;
  font-weight: 400;
  opacity: .75;
  margin-left: 2px;
}
.ds-chip:hover { border-color: var(--color-primary); }
.ds-chip[aria-pressed="true"] {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  font-weight: 700;
}
.ds-btn-restart {
  font: inherit;
  font-size: 1rem;
  cursor: pointer;
  touch-action: manipulation;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1.5px solid var(--color-border);
  background: transparent;
  color: var(--color-text-sub);
}
.ds-btn-restart:hover { border-color: var(--color-primary); color: var(--color-text); }

/* ---- 게임판 ---- */
.ds-stage { max-width: 520px; margin: 0 auto; }

.ds-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}
.ds-stat {
  font-size: 1.05rem;
  color: var(--color-text-sub);
  font-variant-numeric: tabular-nums;
  min-width: 80px;
}
.ds-stat:last-child { text-align: right; }
.ds-stat b { font-size: 1.25rem; color: var(--color-text); }

/* 지금이 외울 차례인지 입력할 차례인지: 항상 보이는 큰 표시 */
.ds-turn {
  flex: 1;
  text-align: center;
  font-size: 1.15rem;
  font-weight: 700;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  color: var(--color-text-sub);
  transition: background .2s ease, color .2s ease;
}
.ds-turn[data-mode="watch"] {
  background: var(--ds-turn-watch-bg);
  border-color: transparent;
  color: var(--ds-turn-watch-fg);
}
.ds-turn[data-mode="input"] {
  background: var(--ds-turn-input-bg);
  border-color: transparent;
  color: var(--ds-turn-input-fg);
}

/* ---- 표시/입력 패널 ----
   패널과 오버레이를 같은 그리드 칸에 겹친다. absolute와 달리
   종료 화면(비교표 포함)이 패널보다 길어지면 영역이 함께 늘어나서
   아래 키패드를 덮는 사고가 없다. */
.ds-panel-wrap { display: grid; }
.ds-panel-wrap > * { grid-area: 1 / 1; }
.ds-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: clamp(240px, 56vw, 300px);
  padding: clamp(16px, 4vw, 24px);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .25s ease;
}
.ds-panel[data-phase="show"] { box-shadow: 0 0 0 3px var(--ds-frame-show); }
.ds-panel[data-phase="input"],
.ds-panel[data-phase="success"] { box-shadow: 0 0 0 3px var(--ds-frame-input); }
.ds-panel[data-phase="fail"] { box-shadow: 0 0 0 3px var(--ds-frame-fail); }

/* 외울 차례: 큰 숫자 하나 */
.ds-show { text-align: center; }
.ds-digit {
  min-height: 1.1em;
  font-size: clamp(5.4rem, 26vw, 8.5rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}
.ds-digit.is-on { animation: ds-pop .16s ease-out; }
@keyframes ds-pop {
  from { transform: scale(.82); opacity: .3; }
  to   { transform: scale(1); opacity: 1; }
}
/* 진행 점: 전체 몇 자리 중 몇 번째인지 */
.ds-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: var(--space-3);
  min-height: 10px;
}
.ds-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--color-border);
}
.ds-dot.is-done { background: var(--ds-frame-show); }

/* 입력할 차례: 입력한 숫자를 그대로 보여주는 칸 */
.ds-inputview { width: 100%; }
.ds-slots {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 10px;
}
.ds-slot {
  width: clamp(34px, 8vw, 44px);
  height: clamp(48px, 11vw, 60px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(1.6rem, 5.5vw, 2.1rem);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: var(--color-text);
  border-bottom: 3px solid var(--ds-slot-line);
}
.ds-slot.is-next { border-bottom-color: var(--ds-frame-input); }
.ds-slot.is-ok { color: var(--ds-ok); border-bottom-color: var(--ds-ok); }
.ds-slot.is-bad { color: var(--ds-bad); border-bottom-color: var(--ds-bad); }

/* 입력 제한 시간: 줄어드는 막대. 숫자 카운트다운보다 시선을 덜 뺏는다 */
.ds-timer {
  margin: var(--space-4) auto 0;
  max-width: 320px;
  height: 8px;
  border-radius: 999px;
  background: var(--color-border);
  overflow: hidden;
}
.ds-timer-fill {
  height: 100%;
  border-radius: inherit;
  background: var(--ds-frame-input);
  transform-origin: left;
  transform: scaleX(1);
  will-change: transform;
}
.ds-timer-fill.is-low { background: var(--ds-bad); }

/* ---- 키패드 ---- */
.ds-keypad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  max-width: 340px;
  margin: var(--space-4) auto 0;
}
.ds-key {
  font: inherit;
  font-size: 1.55rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  user-select: none;
  min-height: clamp(54px, 12vw, 64px);
  border-radius: 14px;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  transition: transform .06s ease, border-color .1s ease;
}
.ds-key:hover { border-color: var(--color-primary); }
.ds-key:active { transform: scale(.94); }
.ds-key:focus-visible { outline: 3px solid var(--color-text); outline-offset: 2px; }
.ds-key-del { font-size: 1.05rem; color: var(--color-text-sub); }
/* 외울 차례·종료 화면에서는 키패드가 잠긴다: 시각적으로도 분명하게 */
.ds-keypad[data-locked="true"] .ds-key {
  opacity: .4;
  cursor: default;
  transform: none;
}
.ds-keypad[data-locked="true"] .ds-key:hover { border-color: var(--color-border); }

/* ---- 오버레이(시작/종료) ---- */
.ds-overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 24px;
  background: color-mix(in srgb, var(--color-bg) 78%, transparent);
  -webkit-backdrop-filter: blur(3px);
          backdrop-filter: blur(3px);
}
@supports not (background: color-mix(in srgb, red 50%, transparent)) {
  .ds-overlay { background: rgba(243, 240, 232, .86); }
  :root[data-theme="dark"] .ds-overlay { background: rgba(23, 19, 14, .86); }
}
.ds-overlay-panel {
  text-align: center;
  padding: var(--space-4) var(--space-5);
  max-width: 100%;
}
.ds-overlay-note {
  margin: 0 0 var(--space-4);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--color-text);
}
.ds-btn-big {
  font: inherit;
  font-size: 1.35rem;
  font-weight: 700;
  cursor: pointer;
  touch-action: manipulation;
  padding: 18px 44px;
  border-radius: 999px;
  border: 0;
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow);
}
.ds-btn-big:hover { filter: brightness(1.06); }
.ds-btn-big:active { transform: scale(.97); }

.ds-over-label { margin: 0; font-size: 1.02rem; color: var(--color-text-sub); }
.ds-over-level {
  margin: var(--space-1) 0 var(--space-1);
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.15;
}
.ds-over-level b { font-size: 3rem; color: var(--color-primary); }
.ds-over-best {
  margin: 0 0 var(--space-3);
  font-size: 1.02rem;
  color: var(--color-text-sub);
}
.ds-over-best .ds-new-record { color: var(--color-primary); font-weight: 700; }

/* 내 입력과 정답 나란히 비교 */
.ds-compare {
  margin: 0 auto var(--space-3);
  display: grid;
  gap: 6px;
  justify-items: start;
  width: fit-content;
  max-width: 100%;
}
.ds-cmp-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.ds-cmp-lab {
  font-size: .88rem;
  font-weight: 700;
  color: var(--color-text-sub);
  min-width: 56px;
  text-align: right;
}
.ds-cmp-digits { display: flex; gap: 4px; flex-wrap: wrap; }
.ds-cmp-d {
  width: 30px; height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  border-radius: 8px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}
.ds-cmp-d.is-bad {
  background: var(--ds-bad-weak);
  border-color: var(--ds-bad);
  color: var(--ds-bad);
}
.ds-cmp-note {
  margin: 2px 0 0;
  font-size: .85rem;
  color: var(--color-text-sub);
}
.ds-over-bench {
  margin: 0 0 var(--space-4);
  font-size: .92rem;
  color: var(--color-text-sub);
}

/* ---- 안내 문구 ---- */
.ds-msg {
  min-height: 1.8em;
  margin: var(--space-3) 0 0;
  text-align: center;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
}

/* ---- 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) {
  .ds-digit.is-on { animation: none; }
  .ds-key, .ds-turn, .ds-btn-big { transition: none; }
}

@media (max-width: 420px) {
  .ds-stat { min-width: 64px; font-size: .95rem; }
  .ds-turn { font-size: 1.02rem; padding: 9px 10px; }
}