/* ============================================================
   소코반 전용 스타일
   - 창고 느낌: 라이트/다크 상관없이 차분한 슬레이트 판 위에 벽은 묵직한
     블록, 바닥은 은은하게, 상자는 나무 상자색, 목표는 과녁, 일꾼은 둥근
     토큰. 격자는 레벨마다 --cols/--rows로 크기가 바뀌고 셀은 정사각.
   - 벽 블록이 서로 붙어 창고 벽처럼 보이도록 셀 간격은 0. 격자 밖(void)은
     투명해서 창고 모양만 떠 보인다.
   ============================================================ */

:root {
  --sk-panel: #1b1e26;
  --sk-panel-edge: #2b2f3b;
  --sk-wall: #3b4252;
  --sk-wall-hi: #4a5164;
  --sk-floor: #262a33;
  --sk-floor-line: rgba(255, 255, 255, .045);
  --sk-goal: #e0b64a;         /* 목표 과녁 */
  --sk-box: #c98a4b;          /* 나무 상자 */
  --sk-box-hi: #e0a566;
  --sk-box-goal: #4bb573;     /* 목표에 올라간 상자 */
  --sk-box-goal-hi: #6fd196;
  --sk-player: #4f8bef;       /* 일꾼 */
  --sk-player-hi: #7db0ff;
  --sk-accent: #c98a4b;
}

/* ---- 도입부 ---- */
.tool-intro { padding: clamp(30px, 5vw, 56px) 0 clamp(18px, 3vw, 30px); }
.tool-intro h1 { margin: 0 0 var(--space-4); }
.tool-intro .accent { color: var(--sk-accent); }
.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); }

/* ---- 무대 ---- */
.sk-stage { max-width: 560px; margin: 0 auto; }

/* ---- 상단 바(레벨 + 기록) ---- */
.sk-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}
.sk-level { display: flex; align-items: center; gap: 6px; }
.sk-nav {
  font: inherit;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  touch-action: manipulation;
  width: 40px; height: 44px;
  border-radius: 10px;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}
.sk-nav:hover:not(:disabled) { border-color: var(--sk-accent); color: var(--sk-accent); }
.sk-nav:disabled { opacity: .35; cursor: default; }
.sk-levelbtn {
  font: inherit;
  cursor: pointer;
  touch-action: manipulation;
  padding: 6px 16px;
  border-radius: 10px;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.2;
  min-width: 128px;
}
.sk-levelbtn:hover { border-color: var(--sk-accent); }
.sk-levelbtn #levelLabel { font-weight: 700; font-size: 1rem; }
.sk-levelbtn-sub { font-size: .72rem; color: var(--color-text-sub); }

.sk-stats { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.sk-stat { font-size: .82rem; color: var(--color-text-sub); font-variant-numeric: tabular-nums; }
.sk-stat b { font-size: 1.1rem; color: var(--color-text); margin-left: 3px; }
.sk-stat-best b { font-size: .95rem; }

/* ---- 게임판 ---- */
.sk-board-wrap {
  position: relative;
  display: flex;
  justify-content: center;
  background: var(--sk-panel);
  border: 1px solid var(--sk-panel-edge);
  border-radius: 16px;
  padding: clamp(10px, 2.4vw, 18px);
  box-shadow: var(--shadow);
}
.sk-board {
  --cols: 8; --rows: 8;
  display: grid;
  grid-template-columns: repeat(var(--cols), 1fr);
  grid-template-rows: repeat(var(--rows), 1fr);
  width: 100%;
  touch-action: none;    /* 스와이프가 페이지 스크롤로 새지 않게 */
}
.sk-cell { position: relative; }
.sk-cell.is-void { background: transparent; }
.sk-cell.is-wall {
  background: var(--sk-wall);
  box-shadow: inset 1px 1px 0 var(--sk-wall-hi), inset -1px -1px 0 rgba(0, 0, 0, .28);
}
.sk-cell.is-floor {
  background: var(--sk-floor);
  box-shadow: inset 0 0 0 1px var(--sk-floor-line);
}
/* 목표 과녁 */
.sk-cell.is-goal::before {
  content: "";
  position: absolute;
  inset: 30%;
  border-radius: 50%;
  border: 2px solid var(--sk-goal);
  opacity: .9;
}
/* 상자 */
.sk-cell.is-box {
  background: var(--sk-box);
  border-radius: 3px;
  box-shadow: inset 2px 2px 0 var(--sk-box-hi), inset -2px -2px 0 rgba(0, 0, 0, .3),
              inset 0 0 0 1px rgba(0, 0, 0, .25);
}
.sk-cell.is-box::before {
  content: "";
  position: absolute;
  inset: 26%;
  border: 1.5px solid rgba(0, 0, 0, .22);
  border-radius: 2px;
}
.sk-cell.is-box.is-box-goal {
  background: var(--sk-box-goal);
  box-shadow: inset 2px 2px 0 var(--sk-box-goal-hi), inset -2px -2px 0 rgba(0, 0, 0, .28),
              inset 0 0 0 1px rgba(0, 0, 0, .22);
}
/* 일꾼 */
.sk-cell.is-player::after {
  content: "";
  position: absolute;
  inset: 17%;
  border-radius: 50%;
  background: radial-gradient(circle at 34% 30%, var(--sk-player-hi), var(--sk-player));
  box-shadow: 0 1px 3px rgba(0, 0, 0, .4), inset 0 0 0 1px rgba(255, 255, 255, .25);
}

/* ---- 완주 오버레이 ---- */
.sk-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  z-index: 3;
  background: rgba(20, 23, 30, .93);
  -webkit-backdrop-filter: blur(3px);
          backdrop-filter: blur(3px);
}
.sk-overlay-panel { text-align: center; padding: var(--space-4) var(--space-5); color: #fff; max-width: 100%; }
.sk-ov-title { margin: 0 0 var(--space-2); font-family: var(--font-serif); font-size: 1.7rem; font-weight: 700; color: #fff; }
.sk-ov-stats { margin: 0 0 var(--space-1); font-size: 1.05rem; color: rgba(255, 255, 255, .88); }
.sk-ov-stats b { color: var(--sk-box-hi); font-family: var(--font-serif); font-size: 1.5rem; }
.sk-ov-line { margin: 0 0 var(--space-3); font-size: .92rem; color: rgba(255, 255, 255, .8); min-height: 1.2em; }
.sk-ov-line b { color: #fff; }
.sk-new { color: var(--sk-box-goal-hi); font-weight: 700; }
.sk-ov-btns { display: flex; gap: var(--space-2); justify-content: center; flex-wrap: wrap; }

/* ---- 데드락 경고 ---- */
.sk-dead {
  min-height: 1.6em;
  margin: var(--space-3) 0 0;
  text-align: center;
  font-size: .95rem;
  font-weight: 700;
  color: transparent;
  transition: color .15s ease;
}
.sk-dead.is-on { color: #e0674f; }
.sk-inline {
  font: inherit;
  font-size: .9rem;
  font-weight: 700;
  cursor: pointer;
  margin-left: 6px;
  padding: 3px 12px;
  border-radius: 999px;
  border: 1.5px solid #e0674f;
  background: transparent;
  color: #e0674f;
}
.sk-inline:hover { background: #e0674f; color: #fff; }

/* ---- 조작(방향 + 액션) ---- */
.sk-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(20px, 6vw, 48px);
  margin-top: var(--space-4);
  flex-wrap: wrap;
}
.sk-dpad {
  display: grid;
  grid-template-columns: repeat(3, 52px);
  grid-template-rows: repeat(3, 52px);
  gap: 6px;
}
.sk-dir {
  font: inherit;
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
  touch-action: manipulation;
  border-radius: 12px;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}
.sk-dir:hover { border-color: var(--sk-accent); color: var(--sk-accent); }
.sk-dir:active { transform: scale(.94); background: color-mix(in srgb, var(--sk-accent) 14%, var(--color-surface)); }
.sk-up { grid-area: 1 / 2; }
.sk-left { grid-area: 2 / 1; }
.sk-right { grid-area: 2 / 3; }
.sk-down { grid-area: 3 / 2; }

.sk-actions { display: flex; flex-direction: column; gap: var(--space-2); }
.sk-btn {
  font: inherit;
  font-size: .98rem;
  font-weight: 700;
  cursor: pointer;
  touch-action: manipulation;
  padding: 11px 22px;
  border-radius: 999px;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}
.sk-btn:hover { border-color: var(--sk-accent); color: var(--sk-accent); }
.sk-btn:active { transform: scale(.97); }
.sk-btn-big {
  font: inherit;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  touch-action: manipulation;
  padding: 11px 26px;
  border-radius: 999px;
  border: 0;
  background: var(--sk-accent);
  color: #fff;
  box-shadow: var(--shadow);
}
.sk-btn-big:hover { filter: brightness(1.06); }
.sk-btn-big:active { transform: scale(.97); }
.sk-btn-big:disabled { opacity: .4; cursor: default; filter: none; }

/* ---- 안내 문구 ---- */
.sk-msg {
  min-height: 1.6em;
  margin: var(--space-4) 0 0;
  text-align: center;
  font-size: .9rem;
  color: var(--color-text-sub);
}

/* ---- 레벨 피커 ---- */
.sk-picker {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  background: rgba(0, 0, 0, .5);
  -webkit-backdrop-filter: blur(2px);
          backdrop-filter: blur(2px);
}
.sk-picker-panel {
  width: 100%;
  max-width: 460px;
  max-height: 82vh;
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: var(--space-4) var(--space-5) var(--space-5);
  box-shadow: var(--shadow-lg, 0 20px 50px rgba(0, 0, 0, .35));
}
.sk-picker-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-3); }
.sk-picker-head strong { font-size: 1.1rem; }
.sk-picker-close {
  font: inherit; font-size: 1.1rem; cursor: pointer;
  width: 34px; height: 34px; border-radius: 8px;
  border: 1.5px solid var(--color-border); background: transparent; color: var(--color-text);
}
.sk-picker-close:hover { border-color: var(--sk-accent); color: var(--sk-accent); }
.sk-chips { display: flex; gap: var(--space-2); margin-bottom: var(--space-3); flex-wrap: wrap; }
.sk-chip {
  font: inherit; font-size: .9rem; cursor: pointer;
  padding: 6px 14px; border-radius: 999px;
  border: 1.5px solid var(--color-border); background: var(--color-surface); color: var(--color-text);
}
.sk-chip[aria-pressed="true"] { background: var(--sk-accent); border-color: var(--sk-accent); color: #fff; font-weight: 700; }
.sk-pick-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
  gap: 8px;
  overflow-y: auto;
  padding: 2px;
}
.sk-pick {
  font: inherit; font-size: .95rem; font-weight: 700;
  cursor: pointer; touch-action: manipulation;
  aspect-ratio: 1 / 1;
  border-radius: 8px;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}
.sk-pick:hover { border-color: var(--sk-accent); }
.sk-pick.is-done { border-color: var(--sk-box-goal); color: var(--sk-box-goal); }
.sk-pick.is-current { background: var(--sk-accent); border-color: var(--sk-accent); color: #fff; }
.sk-picker-note { margin: var(--space-3) 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); }
.prose a[target="_blank"] { word-break: break-all; }

@media (prefers-reduced-motion: reduce) {
  .sk-dir:active, .sk-btn:active, .sk-btn-big:active { transform: none; }
}

@media (max-width: 420px) {
  .sk-topbar { justify-content: center; }
  .sk-dpad { grid-template-columns: repeat(3, 46px); grid-template-rows: repeat(3, 46px); }
}