/* ============================================================
   이미지 포맷 변환 전용 스타일
   (색상·간격·카드 등 공통 토큰은 common.css 재사용)
   - 이 도구의 모티프: 필름 스트립을 연상시키는 사선 줄무늬
   - 본체는 파비콘 생성기와 같은 "작업대" 톤: 각진 패널, 모노 수치
   ============================================================ */

:root {
  --ic-mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas,
             "Liberation Mono", "Nanum Gothic Coding", monospace;
  /* 투명 미리보기용 체커보드 (테마별로 명도만 조정) */
  --ic-check-bg: #ffffff;
  --ic-check-fg: rgba(0, 0, 0, .10);
}
:root[data-theme="dark"] {
  --ic-check-bg: #26262b;
  --ic-check-fg: rgba(255, 255, 255, .09);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ic-check-bg: #26262b;
    --ic-check-fg: rgba(255, 255, 255, .09);
  }
}

/* ---- 도입부: 필름 스트립 사선 배경 (이 도구의 얼굴) ---- */
.film-grid { position: relative; overflow: hidden; }
.film-grid > * { position: relative; }
.film-grid::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(-45deg,
    var(--color-grid) 0 2px, transparent 2px 16px);
  opacity: .38;
  -webkit-mask-image: linear-gradient(115deg, rgba(0,0,0,.55), transparent 58%);
          mask-image: linear-gradient(115deg, rgba(0,0,0,.55), transparent 58%);
  pointer-events: 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
   ============================================================ */
.ic-panel {
  border-radius: var(--radius-sm);   /* 공통 카드보다 각지게: 작업대 톤 */
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* ---- 드롭존 ---- */
.ic-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;
}
.ic-drop:hover, .ic-drop:focus-visible { border-color: var(--color-primary); }
.ic-drop:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.ic-drop.is-drag {
  border-color: var(--color-primary);
  background: var(--color-primary-weak);
}
.ic-drop-main { margin: 0 0 6px; font-weight: 600; }
.ic-drop-main u { text-decoration-color: var(--color-primary); text-underline-offset: 3px; }
.ic-drop-sub { margin: 0; font-size: .8rem; color: var(--color-text-sub); }

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

/* 선택 칩 (라디오) */
.ic-chips { display: inline-flex; flex-wrap: wrap; gap: 6px; }
.ic-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;
}
.ic-chips .chip:hover { border-color: var(--color-primary); }
.ic-chips .chip:has(input:checked) {
  background: var(--color-primary-weak);
  border-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: 600;
}
.ic-chips .chip input { accent-color: var(--color-primary); margin: 0; }
.ic-chips .chip.is-disabled { opacity: .4; cursor: not-allowed; }

input[type="range"].ic-range {
  flex: 1;
  min-width: 140px;
  max-width: 320px;
  accent-color: var(--color-primary);
}
.ic-value {
  font-family: var(--ic-mono);
  font-size: .82rem;
  min-width: 3em;
  font-variant-numeric: tabular-nums;
}
input[type="color"].ic-color {
  width: 44px;
  height: 32px;
  padding: 2px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-bg);
  cursor: pointer;
}

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

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

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

.ic-info, .ic-out { min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.ic-info { flex: 1 1 180px; }
.ic-out { flex: 1 1 180px; }
.ic-name {
  font-family: var(--ic-mono);
  font-size: .82rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ic-meta {
  font-size: .76rem;
  color: var(--color-text-sub);
  font-variant-numeric: tabular-nums;
}
.ic-meta.is-error { color: var(--color-primary); }
.ic-meta .ic-saving { color: var(--color-primary); font-weight: 600; }

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

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

@media (max-width: 640px) {
  .ic-item { flex-wrap: wrap; }
  .ic-arrow { display: none; }
  .ic-info, .ic-out { flex: 1 1 40%; }
  .ic-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 code {
  font-family: var(--ic-mono);
  font-size: .86em;
  background: var(--color-primary-weak);
  border-radius: 4px;
  padding: 1px 5px;
}
.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; }