/* ============================================================
   HEIC 변환기 전용 스타일
   (색상·간격·카드 등 공통 토큰은 common.css 재사용)
   - 이 도구의 모티프: 비스듬히 겹쳐 쌓인 사진 인화지
     "폰에서 우르르 받은 사진 뭉치"를 떠올리게 한다
   - 본체는 이미지 포맷 변환기와 같은 "작업대" 톤: 각진 패널, 모노 수치
   ============================================================ */

:root {
  --hc-mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas,
             "Liberation Mono", "Nanum Gothic Coding", monospace;
  --hc-check-bg: #ffffff;
  --hc-check-fg: rgba(0, 0, 0, .10);
  --hc-photo-edge: rgba(38, 34, 28, .22);   /* 인화지 테두리 선 */
}
:root[data-theme="dark"] {
  --hc-check-bg: #26262b;
  --hc-check-fg: rgba(255, 255, 255, .09);
  --hc-photo-edge: rgba(236, 230, 218, .2);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --hc-check-bg: #26262b;
    --hc-check-fg: rgba(255, 255, 255, .09);
    --hc-photo-edge: rgba(236, 230, 218, .2);
  }
}

/* ---- 도입부: 겹쳐 쌓인 사진 인화지 (이 도구의 얼굴) ---- */
.photo-stack { position: relative; overflow: visible; }
.photo-stack > * { position: relative; z-index: 1; }
.photo-stack::before,
.photo-stack::after {
  content: "";
  position: absolute;
  top: 14%;
  right: 2%;
  width: 190px;
  height: 150px;
  border: 2px solid var(--hc-photo-edge);
  border-radius: 3px;
  background:
    linear-gradient(var(--color-surface), var(--color-surface)) padding-box;
  /* 인화지 위쪽 여백(사진 영역 표시) */
  box-shadow: inset 0 34px 0 -26px var(--hc-photo-edge);
  pointer-events: none;
  z-index: 0;
}
.photo-stack::before { transform: rotate(-7deg) translate(-44px, 16px); opacity: .5; }
.photo-stack::after { transform: rotate(4deg); opacity: .85; }
@media (max-width: 760px) {
  .photo-stack::before, .photo-stack::after { display: none; }
}

.tool-intro {
  padding: var(--space-6) 0 var(--space-5);
  margin-bottom: var(--space-5);
}
.tool-intro h1 {
  margin: 0 0 var(--space-3);
  max-width: 20ch;
  font-size: clamp(2.1rem, 5vw, 3.1rem);
  line-height: 1.18;
  letter-spacing: -.02em;
}
.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);
}

/* ============================================================
   작업대 패널: 드롭존 + 설정
   ============================================================ */
.hc-panel {
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* ---- 드롭존 ---- */
.hc-drop {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  padding: var(--space-6) var(--space-4);
  text-align: center;
  cursor: pointer;
}
.hc-drop:hover, .hc-drop:focus-visible { border-color: var(--color-primary); }
.hc-drop:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.hc-drop.is-drag {
  border-color: var(--color-primary);
  background: var(--color-primary-weak);
}
.hc-drop-main { margin: 0 0 6px; font-weight: 600; }
.hc-drop-main u { text-decoration-color: var(--color-primary); text-underline-offset: 3px; }
.hc-drop-sub { margin: 0; font-size: .8rem; color: var(--color-text-sub); }

/* ---- 설정 행 ---- */
.hc-settings { display: flex; flex-direction: column; gap: var(--space-3); }
.hc-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.hc-label {
  flex: none;
  min-width: 6em;
  font-size: .8rem;
  font-weight: 600;
  color: var(--color-text-sub);
}
.hc-note { margin: 0; font-size: .8rem; color: var(--color-text-sub); }
.hc-warn { color: var(--color-primary); }

.hc-chips { display: inline-flex; flex-wrap: wrap; gap: 6px; }
.hc-chips .chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 13px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-surface);
  cursor: pointer;
  font-size: .86rem;
  user-select: none;
}
.hc-chips .chip:hover { border-color: var(--color-primary); }
.hc-chips .chip:has(input:checked) {
  background: var(--color-primary-weak);
  border-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: 600;
}
.hc-chips .chip input { accent-color: var(--color-primary); margin: 0; }

input[type="range"].hc-range {
  flex: 1;
  min-width: 140px;
  max-width: 320px;
  accent-color: var(--color-primary);
}
.hc-value {
  font-family: var(--hc-mono);
  font-size: .82rem;
  min-width: 3em;
  font-variant-numeric: tabular-nums;
}
select.hc-select {
  font: inherit;
  font-size: .86rem;
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-surface);
  color: var(--color-text);
}

/* ============================================================
   변환 결과 목록
   ============================================================ */
.hc-results {
  margin-top: var(--space-4);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
}
.hc-results-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-3);
}
.hc-summary {
  margin: 0;
  font-size: .88rem;
  color: var(--color-text-sub);
}
.hc-summary strong { color: var(--color-text); }
.hc-results-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.hc-results button:disabled { opacity: .45; cursor: not-allowed; }

.hc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}
.hc-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-top: 1px dashed var(--color-border);
}
.hc-item:first-child { border-top: 0; }

.hc-thumb {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background-color: var(--hc-check-bg);
  background-image: conic-gradient(var(--hc-check-fg) 25%, transparent 0 50%,
                                   var(--hc-check-fg) 0 75%, transparent 0);
  background-size: 12px 12px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  overflow: hidden;
}
.hc-thumb canvas { display: block; }

.hc-info, .hc-out { min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.hc-info { flex: 1 1 180px; }
.hc-out { flex: 1 1 180px; }
.hc-name {
  font-family: var(--hc-mono);
  font-size: .82rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.hc-meta {
  font-size: .76rem;
  color: var(--color-text-sub);
  font-variant-numeric: tabular-nums;
}
.hc-meta.is-error { color: var(--color-primary); }

.hc-arrow {
  flex: none;
  color: var(--color-text-sub);
  font-size: .9rem;
}

.hc-actions { flex: none; display: flex; gap: 6px; }
.hc-btn-sm { padding: 5px 12px; font-size: .82rem; }
.hc-btn-x {
  padding: 5px 9px;
  font-size: .82rem;
  line-height: 1;
  color: var(--color-text-sub);
}
.hc-btn-x:hover { color: var(--color-primary); }

@media (max-width: 640px) {
  .hc-item { flex-wrap: wrap; }
  .hc-arrow { display: none; }
  .hc-info, .hc-out { flex: 1 1 40%; }
  .hc-actions { margin-left: auto; }
}

/* ---- 설명/FAQ 본문 (다른 도구와 동일 톤) ---- */
.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 {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-2);
  background: var(--color-surface);
}
.prose summary { cursor: pointer; font-weight: 600; }
.prose details[open] summary { margin-bottom: var(--space-2); }
.prose details p { margin: 0 0 var(--space-2); color: var(--color-text-sub); }
.prose details p:last-child { margin-bottom: 0; }