/* 기본 */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }

/* ✅ 상단 고정 버튼 높이만큼 안전 여백 확보 */
:root {
  --home-btn-space: 68px;   /* 데스크탑 기준 버튼 높이 + 여백 */
}
@media (max-width: 600px) {
  :root { --home-btn-space: 56px; } /* 모바일에서 버튼이 작아지므로 여백 축소 */
}

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans KR', sans-serif;
  min-height: 100vh;
  color: #2d3748;
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(255,255,255,0.9), rgba(255,255,255,0)),
    linear-gradient(135deg, #e6e9ff 0%, #c8c3ff 100%);
}
@media (prefers-color-scheme: dark) {
  body {
    color: #e2e8f0;
    background:
      radial-gradient(800px 400px at 50% -10%, rgba(255,255,255,0.08), transparent),
      linear-gradient(135deg, #0f1325 0%, #151a33 100%);
  }
}

/* 레이아웃 공통 */
.container { max-width: 980px; margin: 0 auto; padding: 20px 16px 80px; }
.page-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255,255,255,.7);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0,0,0,.08);
  /* ⬇️ 상단 고정 버튼 공간만큼 추가 패딩 */
  padding: calc(18px + var(--home-btn-space)) 16px 18px;
  text-align: center;
}
.page-header h1 {
  font-size: 28px; font-weight: 800;
  background: linear-gradient(135deg, #667eea, #764ba2);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
/* 🔎 안내문 가독성 강화 */
.subtitle {
  margin-top: 6px;
  color: #1a202c;
  font-weight: 800;
  font-size: 16.5px;
}
@media (prefers-color-scheme: dark) { .subtitle { color: #f7fafc; } }

/* 스테이지 */
.stage-wrap { margin-top: 14px; display: grid; gap: 12px; justify-items: center; }
.stage {
  width: min(94vw, 720px);
  height: min(60vh, 460px);
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  outline: none;
  background:
    radial-gradient(360px 180px at 50% 78%, rgba(255,255,255,.65), rgba(255,255,255,0) 70%),
    radial-gradient(1200px 520px at 50% 128%, rgba(0,0,0,.45), rgba(0,0,0,0));
  box-shadow:
    inset 0 -26px 80px rgba(0,0,0,.38),
    0 24px 60px rgba(0,0,0,.20);
  cursor: pointer;
}

/* 핀 조명과 바닥 — 아래쪽으로 넓게 */
.pinlight, .floor { position: absolute; inset: 0; pointer-events: none; }
.pinlight { background: radial-gradient(420px 220px at 50% 82%, rgba(255,255,255,.55), rgba(255,255,255,0) 72%); mix-blend-mode: screen; }
.floor   { background: radial-gradient(720px 200px at 50% 96%, rgba(0,0,0,.40), rgba(0,0,0,0) 70%); }

/* 스테이지 상단 힌트 */
.stage-hint {
  position: absolute; top: 10px; left: 50%; transform: translateX(-50%);
  font-size: 13px; font-weight: 800; letter-spacing: 0.2px;
  padding: 4px 10px; border-radius: 999px;
  background: rgba(255,255,255,.9); color: #1a202c;
  border: 1px solid rgba(0,0,0,.08);
}
@media (prefers-color-scheme: dark) {
  .stage-hint { background: rgba(0,0,0,.7); color: #f7fafc; border-color: rgba(255,255,255,.15); }
}

/* 주사위 영역 */
.dice-area {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center; gap: 18px;
  flex-wrap: wrap;
  padding: 52px 16px 94px;
}

/* 스테이지 하단 컨트롤 바 */
.stage-controls {
  position: absolute; left: 0; right: 0; bottom: 0;
  display: grid; grid-template-columns: auto auto 1fr auto; gap: 10px; align-items: center;
  padding: 10px 12px;
  background: rgba(255,255,255,.86);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  border-top: 1px solid rgba(0,0,0,.08);
}
.label { font-weight: 900; padding-left: 2px; }
.select {
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid rgba(0,0,0,.15);
  background: rgba(255,255,255,.98);
  color: #1a202c;
  min-width: 88px;
  font-size: 14px;
}
.select:focus { outline: 2px solid rgba(102,126,234,.6); outline-offset: 2px; }
.btn {
  padding: 10px 16px;
  border-radius: 12px;
  border: 1px solid rgba(0,0,0,.12);
  background: #fff;
  cursor: pointer;
  font-weight: 900;
  box-shadow: 0 6px 16px rgba(0,0,0,.08);
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  white-space: nowrap;
}
.btn.big { padding: 14px 22px; font-size: 18px; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 10px 20px rgba(0,0,0,.12); }
.btn.primary { color: #fff; border: none; background: linear-gradient(135deg, #667eea, #764ba2); }

@media (max-width: 560px) {
  .stage-controls { grid-template-columns: auto 1fr; }
  .btn, .btn.big { width: 100%; }
}
@media (prefers-color-scheme: dark) {
  .stage-controls { background: rgba(0,0,0,.50); border-color: rgba(255,255,255,.12); }
  .select { background: rgba(255,255,255,.10); color: #f7fafc; border-color: rgba(255,255,255,.22); }
  .select option { color: #0a0a0a; }
  .btn { background: rgba(255,255,255,.06); color: #e2e8f0; border-color: rgba(255,255,255,.12); }
  .btn.primary { background: linear-gradient(135deg, #6b7cff, #8b6bff); }
}

/* ===== 3D 주사위 (정육면체) ===== */
:root {
  --die-size: 104px;
  --die-half: 52px;
}
@media (max-width: 520px) {
  :root { --die-size: 92px; --die-half: 46px; }
}
.scene { width: var(--die-size); height: var(--die-size); perspective: 1000px; position: relative; }
.die {
  width: 100%; height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transform: rotateX(18deg) rotateY(24deg);
  transition: transform 1000ms cubic-bezier(.19,1,.22,1);
}
.face {
  position: absolute; width: 100%; height: 100%;
  background: #fff; border-radius: 18px; border: 2px solid rgba(0,0,0,.1);
  display: grid; place-items: center;
  box-shadow: inset 0 0 0 2px rgba(0,0,0,.04), 0 6px 12px rgba(0,0,0,.12);
}
.face::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(50% 50% at 30% 25%, rgba(255,255,255,.45), rgba(255,255,255,0));
  border-radius: inherit; pointer-events: none;
}
@media (prefers-color-scheme: dark) {
  .face {
    background: #121826; border-color: rgba(255,255,255,.12);
    box-shadow: inset 0 0 0 2px rgba(255,255,255,.05), 0 6px 12px rgba(0,0,0,.35);
  }
  .face::after { background: radial-gradient(50% 50% at 30% 25%, rgba(255,255,255,.15), transparent); }
}

/* 점(눈) */
.pips { display: grid; grid-template: repeat(3, 1fr) / repeat(3, 1fr); width: 72%; height: 72%; }
.pip  { width: 12px; height: 12px; border-radius: 50%; background: #2d3748; margin: auto; }
@media (prefers-color-scheme: dark) { .pip { background: #e2e8f0; } }

/* 면 배치 */
.face--front  { transform: translateZ(var(--die-half)); }
.face--back   { transform: rotateY(180deg) translateZ(var(--die-half)); }
.face--right  { transform: rotateY(90deg)  translateZ(var(--die-half)); }
.face--left   { transform: rotateY(-90deg) translateZ(var(--die-half)); }
.face--top    { transform: rotateX(90deg)  translateZ(var(--die-half)); }
.face--bottom { transform: rotateX(-90deg) translateZ(var(--die-half)); }

/* 바닥 그림자 */
.die-shadow {
  position: absolute;
  width: calc(var(--die-size) * .9); height: calc(var(--die-size) * .28);
  left: 50%; bottom: calc(var(--die-half) * -0.2);
  transform: translateX(-50%);
  background: radial-gradient(60% 60% at 50% 50%, rgba(0,0,0,.35), rgba(0,0,0,0) 70%);
  filter: blur(2px);
  pointer-events: none;
}

/* 굴림 애니메이션 템플릿 */
.die.roll { animation: tumble 900ms cubic-bezier(.22,.61,.36,1) 2 both; }
@keyframes tumble {
  0%   { transform: translateX(-8px) rotateX(0)   rotateY(0)    rotateZ(0); }
  25%  { transform: translateX(10px) rotateX(180deg) rotateY(90deg)  rotateZ(12deg); }
  50%  { transform: translateX(-6px) rotateX(360deg) rotateY(180deg) rotateZ(0); }
  75%  { transform: translateX(4px)  rotateX(540deg) rotateY(270deg) rotateZ(-10deg); }
  100% { transform: translateX(0)    rotateX(720deg) rotateY(360deg) rotateZ(0); }
}

/* 결과 */
.result-stack { display: grid; gap: 8px; justify-items: center; text-align: center; }
.result-line  { font-size: clamp(16px, 2.2vw, 20px); font-variant-numeric: tabular-nums; letter-spacing: .5px; color: #2d3748; }
.sum-big {
  font-size: clamp(30px, 6.4vw, 46px);
  font-weight: 900;
  background: linear-gradient(135deg, #667eea, #764ba2);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  text-shadow: 0 10px 28px rgba(102,126,234,.35);
}
@media (prefers-color-scheme: dark) {
  .result-line { color: #e2e8f0; }
  .sum-big { text-shadow: 0 10px 28px rgba(139,107,255,.22); }
}

/* 히스토리 */
.history { margin-top: 18px; }
.history h2 { font-size: 18px; margin-bottom: 8px; }
.history-list { display: grid; gap: 6px; list-style: decimal inside; }
.history-list li {
  padding: 8px 10px; border-radius: 10px;
  background: rgba(255,255,255,.6); border: 1px solid rgba(0,0,0,.06);
  font-variant-numeric: tabular-nums;
}
.note { margin-top: 8px; color: #718096; font-size: 13px; text-align: right; }
@media (prefers-color-scheme: dark) {
  .history-list li { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.08); }
  .note { color: #a0aec0; }
}

/* 푸터 */
.page-footer { text-align: center; opacity: .7; padding-top: 18px; }

/* =========================================================
   🏠 다른 도구 더 보기 (버튼템플릿 통합 + 겹침 방지)
   ========================================================= */
.home-button {
  position: fixed;
  top: 12px;
  left: 0;
  right: 0;
  margin: auto;
  width: fit-content;
  padding: 14px 24px;
  background-color: #0066cc;
  color: #fff;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1.3em;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
  overflow: hidden;
  transition: background-color 0.3s, transform 0.2s, box-shadow 0.3s;
  z-index: 999;
}
.home-button:hover {
  background-color: #004999;
  transform: translateY(-3px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.5);
}
.home-button::before {
  content: "";
  position: absolute;
  top: 0;
  left: -75%;
  width: 50%;
  height: 100%;
  background: rgba(255, 255, 255, 0.4);
  transform: skewX(-30deg);
  animation: shine 3s infinite;
}
@keyframes shine {
  0%   { left: -75%; }
  50%  { left: 125%; }
  100% { left: -75%; }
}
@media (max-width: 600px) {
  .home-button {
    font-size: 1.1em;
    padding: 10px 16px;
    top: 10px;
  }
}