/* ============================================================
   Image Converter Pro v2 — style.css
   isbr (AI BG Remover) のデザイン言語をベースに、
   icp (Image Converter Pro) のタブ・4枚グリッドUIを統合
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=Noto+Sans+JP:wght@400;500;700&display=swap');

/* ── デザイントークン ── */
:root {
  --icp-bg:       #0f0f11;
  --icp-surface:  #1a1a1f;
  --icp-border:   #2e2e38;
  --icp-accent:   #7c6bff;
  --icp-accent2:  #ff6b9d;
  --icp-green:    #00d4aa;
  --icp-text:     #e8e8f0;
  --icp-muted:    #888899;
  --icp-radius:   16px;
  --icp-font:     'Syne', 'Noto Sans JP', sans-serif;
  --icp-shadow:   0 0 0 1px var(--icp-border), 0 32px 64px rgba(0,0,0,.6);
}

/* ── Wrapper ── */
.icp-wrapper {
  font-family: var(--icp-font);
  background: var(--icp-bg);
  color: var(--icp-text);
  border-radius: var(--icp-radius);
  padding: 40px;
  max-width: 900px;
  margin: 32px auto;
  box-shadow: var(--icp-shadow);
}

/* ── Tabs ── */
.icp-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--icp-border);
  padding-bottom: 16px;
}
.icp-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid var(--icp-border);
  color: var(--icp-muted);
  padding: 10px 22px;
  border-radius: 10px;
  cursor: pointer;
  font-family: var(--icp-font);
  font-weight: 600;
  font-size: 14px;
  transition: all .2s;
}
.icp-tab svg { width: 16px; height: 16px; }
.icp-tab:hover { color: var(--icp-text); border-color: var(--icp-accent); }
.icp-tab.active {
  background: linear-gradient(135deg, var(--icp-accent), var(--icp-accent2));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 16px rgba(124,107,255,.35);
}

/* ── Panels ── */
.icp-panel { display: none; }
.icp-panel.active { display: block; }

/* ── Drop Zone ── */
.icp-drop-zone {
  border: 2px dashed var(--icp-border);
  border-radius: var(--icp-radius);
  padding: 64px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color .25s, background .25s;
  background: linear-gradient(135deg, rgba(124,107,255,.04), rgba(255,107,157,.04));
}
.icp-drop-zone:hover,
.icp-drop-zone.drag-over {
  border-color: var(--icp-accent);
  background: rgba(124,107,255,.08);
}
.icp-drop-inner svg {
  width: 48px; height: 48px;
  color: var(--icp-accent);
  margin-bottom: 14px;
}
.icp-drop-inner p {
  color: var(--icp-text);
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 6px;
  line-height: 1.5;
}
.icp-drop-inner p span { color: var(--icp-accent); }
.icp-drop-sub {
  font-size: .82rem;
  color: var(--icp-muted) !important;
  font-weight: 400 !important;
  margin: 0 !important;
}

/* ── Options Bar ── */
.icp-options-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  background: var(--icp-surface);
  border: 1px solid var(--icp-border);
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 24px;
}

/* Toggle */
.icp-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: .85rem;
  color: var(--icp-muted);
  user-select: none;
  transition: color .15s;
}
.icp-toggle:hover { color: var(--icp-text); }
.icp-toggle input { display: none; }
.icp-toggle-track {
  width: 44px; height: 24px;
  background: var(--icp-border);
  border-radius: 99px;
  position: relative;
  flex-shrink: 0;
  transition: background .2s;
}
.icp-toggle-track::after {
  content: '';
  position: absolute;
  width: 18px; height: 18px;
  background: #fff;
  border-radius: 50%;
  top: 3px; left: 3px;
  transition: transform .2s;
}
.icp-toggle input:checked + .icp-toggle-track {
  background: var(--icp-accent);
}
.icp-toggle input:checked + .icp-toggle-track::after {
  transform: translateX(20px);
}

/* BG mode selector */
.icp-bg-mode-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  padding-left: 12px;
  border-left: 1px solid var(--icp-border);
}
.icp-bg-mode-label {
  font-size: .8rem;
  color: var(--icp-muted);
}
.icp-radio {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .82rem;
  color: var(--icp-muted);
  cursor: pointer;
  user-select: none;
}
.icp-radio input[type="radio"] {
  accent-color: var(--icp-accent);
  cursor: pointer;
}
.icp-radio:has(input:checked) { color: var(--icp-text); }

/* ── Preview Box ── */
.icp-preview-box { margin-top: 4px; }

.icp-preview-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.icp-preview-item { text-align: center; }
.icp-preview-item img {
  max-width: 260px;
  max-height: 260px;
  width: auto; height: auto;
  border-radius: 12px;
  border: 1px solid var(--icp-border);
  display: block;
}
.icp-canvas-wrap canvas {
  max-width: 260px;
  max-height: 260px;
  width: auto; height: auto;
  border-radius: 12px;
  display: block;
}
.icp-label {
  font-size: .75rem;
  color: var(--icp-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 10px;
}
.icp-arrow {
  font-size: 28px;
  color: var(--icp-muted);
  line-height: 1;
}

/* Checker pattern for transparency */
.checker {
  background-image:
    linear-gradient(45deg, #2a2a35 25%, transparent 25%),
    linear-gradient(-45deg, #2a2a35 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #2a2a35 75%),
    linear-gradient(-45deg, transparent 75%, #2a2a35 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  border-radius: 12px;
  display: inline-block;
}

/* ── Status Box (AI処理中) ── */
.icp-status-box {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: rgba(124,107,255,.1);
  border: 1px solid rgba(124,107,255,.3);
  border-radius: 10px;
  font-size: .88rem;
  color: #b0a8ff;
  margin-bottom: 16px;
}

/* ── Progress ── */
.icp-progress {
  margin: 16px 0;
  text-align: center;
}
.icp-progress-bar {
  background: var(--icp-border);
  border-radius: 99px;
  height: 6px;
  overflow: hidden;
  margin-bottom: 8px;
}
.icp-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--icp-accent), var(--icp-accent2));
  border-radius: 99px;
  width: 0%;
  transition: width .3s ease;
}
.icp-progress p {
  font-size: .8rem;
  color: var(--icp-muted);
  margin: 0;
}

/* ── Spinner ── */
.icp-spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(124,107,255,.3);
  border-top-color: var(--icp-accent);
  border-radius: 50%;
  animation: icp-spin .7s linear infinite;
  flex-shrink: 0;
}
@keyframes icp-spin { to { transform: rotate(360deg); } }

/* ── Buttons ── */
.icp-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.icp-btn-primary,
.icp-btn-download,
.icp-btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-family: var(--icp-font);
  font-weight: 700;
  font-size: .9rem;
  letter-spacing: .04em;
  transition: transform .15s, box-shadow .15s, opacity .15s;
}
.icp-btn-primary:active,
.icp-btn-download:active,
.icp-btn-ghost:active { transform: scale(.97); }

.icp-btn-primary {
  background: linear-gradient(135deg, var(--icp-accent), var(--icp-accent2));
  color: #fff;
  box-shadow: 0 4px 20px rgba(124,107,255,.4);
}
.icp-btn-primary:hover {
  box-shadow: 0 6px 28px rgba(124,107,255,.6);
  transform: translateY(-1px);
}
.icp-btn-primary:disabled {
  opacity: .5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.icp-btn-download {
  background: var(--icp-green);
  color: #0f0f11;
  font-weight: 700;
}
.icp-btn-download:hover { opacity: .9; transform: translateY(-1px); }

.icp-btn-ghost {
  background: transparent;
  color: var(--icp-muted);
  border: 1px solid transparent;
}
.icp-btn-ghost:hover {
  color: var(--icp-text);
  border-color: var(--icp-border);
}

.icp-btn-icon { font-style: normal; }

/* ── Quad Grid ── */
.icp-quad-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}
.icp-quad-cell {
  background: var(--icp-surface);
  border: 1px solid var(--icp-border);
  border-radius: var(--icp-radius);
  overflow: hidden;
  min-height: 180px;
  position: relative;
  transition: border-color .2s;
}
.icp-quad-cell:has(.icp-quad-result[style*="block"]) {
  border-color: var(--icp-accent);
}
.icp-quad-drop {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 24px;
  cursor: pointer;
  height: 100%;
  min-height: 180px;
  transition: background .2s;
}
.icp-quad-drop:hover { background: rgba(124,107,255,.07); }
.icp-quad-drop.drag-over { background: rgba(124,107,255,.12); }
.icp-quad-drop svg { width: 28px; height: 28px; color: var(--icp-muted); }
.icp-quad-drop span {
  font-size: 13px;
  color: var(--icp-muted);
  font-weight: 600;
}
.icp-quad-result {
  padding: 10px;
  text-align: center;
}
.icp-quad-result canvas {
  max-width: 100%;
  max-height: 160px;
  border-radius: 8px;
}
.icp-quad-cell-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 8px;
}
.icp-btn-sm {
  font-size: 11px;
  padding: 5px 12px;
  border-radius: 6px;
  border: 1px solid var(--icp-border);
  background: transparent;
  color: var(--icp-muted);
  cursor: pointer;
  font-family: var(--icp-font);
  transition: all .15s;
}
.icp-btn-sm:hover { color: var(--icp-text); border-color: var(--icp-accent); }
.icp-btn-dl {
  background: var(--icp-green) !important;
  border-color: var(--icp-green) !important;
  color: #0f0f11 !important;
  font-weight: 700 !important;
}

.icp-quad-footer {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 8px;
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .icp-wrapper { padding: 24px 16px; }
  .icp-arrow { font-size: 22px; }
  .icp-quad-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .icp-quad-drop { padding: 14px 8px; min-height: 120px; }
  .icp-quad-cell { min-height: 120px; }
  .icp-btn-primary,
  .icp-btn-download,
  .icp-btn-ghost { padding: 12px 20px; font-size: .85rem; }
}