/* ============================================================
   동전 던지기 전용 스타일
   - 이 도구의 디자인 컨셉: "밤하늘의 금화"
     짙은 남색 무대 위로 금화가 떠올랐다 떨어진다. 앞면은 금,
     뒷면은 은으로 나눠 어느 면이 나왔는지 색으로도 읽히게.
   - 색상·간격 등 공통 토큰은 common.css 재사용
   ============================================================ */

/* ---- 이 도구만의 색 ---- */
:root {
  --night: #232e44;           /* 무대: 저녁 남색 */
  --night-deep: #182238;
  --gold: #e8c05a;            /* 앞면(A): 금화 */
  --gold-deep: #b8862f;
  --gold-ink: #52380b;
  --silver: #d9dce3;          /* 뒷면(B): 은화 */
  --silver-deep: #979eab;
  --silver-ink: #333a46;
}
:root[data-theme="dark"] {
  --night: #1a2233;
  --night-deep: #111827;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --night: #1a2233;
    --night-deep: #111827;
  }
}

/* ---- 도입부 (다른 도구와 같은 골격) ---- */
.tool-intro {
  padding: var(--space-6) 0 var(--space-5);
  margin-bottom: var(--space-4);
}
.tool-intro h1 {
  margin: 0 0 var(--space-3);
  max-width: 22ch;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.18;
  letter-spacing: -.02em;
}
.tool-intro .lead { max-width: 56ch; }
.lead {
  color: var(--color-text-sub);
  margin: var(--space-2) 0 var(--space-2);
  max-width: 60ch;
  font-size: 1.02rem;
}
.lead-note {
  color: var(--color-text-sub);
  font-size: .85rem;
  opacity: .85;
  margin: 0 0 var(--space-5);
}

/* ---- 문구 설정 카드 ---- */
.cf-controls {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}
.cf-labels {
  display: flex;
  align-items: flex-end;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.cf-side {
  flex: 1 1 150px;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.cf-side-name {
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .06em;
}
.cf-side-a { color: var(--gold-deep); }
.cf-side-b { color: var(--silver-deep); }
.cf-side input {
  font: inherit;
  font-weight: 700;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  min-width: 0;
}
.cf-side input:focus { outline: 2px solid var(--color-primary); outline-offset: 1px; }
.cf-vs {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--color-text-sub);
  padding-bottom: 10px;
}
.cf-presets {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}
.cf-presets-label { font-size: .82rem; font-weight: 600; color: var(--color-text-sub); }
.cf-chip { font-size: .85rem; border-radius: 999px; padding: 6px 13px; }

/* ---- 동전 무대 ---- */
.cf-stage {
  background:
    radial-gradient(ellipse at 50% 118%, rgba(232, 192, 90, .18), transparent 55%),
    radial-gradient(ellipse at 50% -20%, rgba(255, 255, 255, .06), transparent 60%),
    linear-gradient(var(--night), var(--night-deep));
  border: 1px solid var(--night-deep);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(30px, 5vw, 52px) var(--space-4) var(--space-5);
  text-align: center;
}
.cf-coin-box {
  height: 170px;
  display: grid;
  place-items: center;
  perspective: 640px;
}
.cf-coin {
  position: relative;
  width: 138px;
  height: 138px;
  transform-style: preserve-3d;
  transition: transform 1.25s cubic-bezier(.3, .7, .3, 1);
}
/* 던질 때 위로 붕 떠오르는 궤적(회전과 별개로 박스에 적용) */
@keyframes cf-toss {
  0%   { transform: translateY(0); }
  38%  { transform: translateY(-46px); }
  72%  { transform: translateY(6px); }
  86%  { transform: translateY(-8px); }
  100% { transform: translateY(0); }
}
.cf-coin-box.is-tossing { animation: cf-toss 1.25s cubic-bezier(.35, .6, .45, 1); }

.cf-face {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  display: grid;
  place-items: center;
  padding: 16px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  font-weight: 700;
  font-size: clamp(1.05rem, 2.6vw, 1.3rem);
  line-height: 1.25;
  word-break: keep-all;
  overflow-wrap: break-word;
  text-align: center;
}
.cf-front {
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 255, 255, .55), transparent 42%),
    radial-gradient(circle at 50% 50%, var(--gold) 62%, var(--gold-deep) 100%);
  border: 5px solid var(--gold-deep);
  box-shadow: inset 0 0 0 6px rgba(255, 255, 255, .25), 0 10px 24px rgba(0, 0, 0, .45);
  color: var(--gold-ink);
  transform: translateZ(5px);
}
.cf-back {
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 255, 255, .6), transparent 42%),
    radial-gradient(circle at 50% 50%, var(--silver) 62%, var(--silver-deep) 100%);
  border: 5px solid var(--silver-deep);
  box-shadow: inset 0 0 0 6px rgba(255, 255, 255, .3), 0 10px 24px rgba(0, 0, 0, .45);
  color: var(--silver-ink);
  transform: rotateX(180deg) translateZ(5px);
}

/* ---- 결과·버튼 ---- */
.cf-result {
  margin: var(--space-4) auto 0;
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  font-weight: 700;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0, 0, 0, .45);
}
.cf-result .pick { color: var(--gold); }
.cf-result.is-b .pick { color: var(--silver); }
.cf-actions {
  margin-top: var(--space-4);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.cf-flip-btn {
  font: inherit;
  font-size: 1.08rem;
  font-weight: 700;
  cursor: pointer;
  padding: 13px 34px;
  border: 0;
  border-radius: 999px;
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, .35);
  transition: transform .15s ease;
}
.cf-flip-btn:hover { transform: translateY(-2px); }
.cf-flip-btn:disabled { opacity: .6; cursor: default; transform: none; }
.cf-copy { background: rgba(255, 255, 255, .92); }

/* ---- 통계 카드 ---- */
.cf-stats { margin-top: var(--space-4); }
.cf-stats-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-3);
}
.cf-stats-title { margin: 0; font-size: 1.05rem; }
.cf-batch { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.cf-batch .btn { font-size: .88rem; }
.cf-stats-empty { margin: 0; color: var(--color-text-sub); font-size: .92rem; }
.cf-bar {
  display: flex;
  height: 26px;
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--color-border);
}
.cf-bar-a { background: linear-gradient(var(--gold), var(--gold-deep)); transition: width .4s ease; }
.cf-bar-b { background: linear-gradient(var(--silver), var(--silver-deep)); transition: width .4s ease; flex: 1; }
.cf-stats-line {
  margin: var(--space-2) 0 0;
  font-size: .95rem;
  font-variant-numeric: tabular-nums;
}
.cf-stats-line strong { font-weight: 700; }

/* ---- 본문/FAQ (다른 도구와 같은 골격) ---- */
.prose { margin-top: var(--space-6); }
.prose h2 { margin-bottom: var(--space-3); }
.prose h3 { margin: var(--space-4) 0 var(--space-2); font-size: 1.05rem; }
.prose p, .prose li { color: var(--color-text); }
.prose em { color: var(--color-primary); font-style: normal; font-weight: 600; }
.prose ol, .prose ul { padding-left: 1.2em; }
.prose li { margin-bottom: var(--space-2); }
.prose details {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-2);
}
.prose summary { cursor: pointer; font-weight: 600; }
.prose details[open] summary { margin-bottom: var(--space-2); }
.prose details p { margin: 0; color: var(--color-text-sub); }

@media (prefers-reduced-motion: reduce) {
  .cf-coin { transition: none; }
  .cf-coin-box.is-tossing { animation: none; }
  .cf-bar-a, .cf-bar-b { transition: none; }
  .cf-flip-btn { transition: none; }
  .cf-flip-btn:hover { transform: none; }
}