/* ============================================================
   Reset & Base
   ============================================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  background: #f5f5f5;
  color: #333;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ============================================================
   Layout: Sidebar + Content
   ============================================================ */
.app-wrapper {
  display: flex;
  flex: 1;
  min-height: 0;
}

.sidebar {
  width: 220px;
  background: #fff;
  border-right: 1px solid #e0e0e0;
  padding: 1rem 0;
  flex-shrink: 0;
  z-index: 130;
  overflow-y: auto;
}

.sidebar-nav {
  list-style: none;
}

.sidebar-nav li {
  padding: 0;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.25rem;
  text-decoration: none;
  color: #555;
  font-size: 0.875rem;
  transition: background 0.15s, color 0.15s;
  border-left: 3px solid transparent;
}

.sidebar-nav a:hover {
  background: #f0f6ff;
  color: #333;
}

.sidebar-nav a.active {
  background: #f0f6ff;
  color: #4a90d9;
  border-left-color: #4a90d9;
  font-weight: 600;
}

.sidebar-nav .tab-icon {
  font-size: 1.1rem;
  width: 1.5rem;
  text-align: center;
  flex-shrink: 0;
}

.content-area {
  flex: 1;
  padding: 1.5rem;
  overflow-y: auto;
  min-width: 0;
}

.tab-panel {
  display: none;
  max-width: 800px;
  margin: 0 auto;
}

.tab-panel.active {
  display: block;
}

/* ============================================================
   FAB (Mobile)
   ============================================================ */
.fab {
  display: none;
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #4a90d9;
  color: #fff;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 150;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.fab:hover { background: #357abd; }

.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 120;
}

.overlay.active { display: block; }

/* ============================================================
   Common UI Components
   ============================================================ */
.section {
  margin-bottom: 1.25rem;
}

.section-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: #555;
  margin-bottom: 0.5rem;
  display: block;
}

.card {
  background: #fff;
  border-radius: 8px;
  padding: 1.25rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  margin-bottom: 1rem;
}

.card h3 {
  font-size: 1rem;
  color: #222;
  margin-bottom: 0.75rem;
}

input[type="text"],
input[type="number"],
input[type="password"],
textarea,
select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  font-size: 0.875rem;
  border: 2px solid #ddd;
  border-radius: 8px;
  font-family: inherit;
  background: #fff;
  transition: border-color 0.2s;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: #4a90d9;
}

textarea {
  resize: vertical;
  line-height: 1.6;
}

.btn {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  transition: background-color 0.2s;
  white-space: nowrap;
}

.btn-primary {
  background: #4a90d9;
  color: #fff;
  padding: 0.75rem 2rem;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  width: 100%;
  font-family: inherit;
  transition: background-color 0.2s;
}

.btn-primary:hover { background: #357abd; }
.btn-primary:disabled { background: #b0b0b0; cursor: not-allowed; }

.btn-save { background: #4a90d9; color: #fff; }
.btn-save:hover { background: #357abd; }

.btn-clear { background: #e74c3c; color: #fff; }
.btn-clear:hover { background: #c0392b; }

.btn-secondary {
  background: #eee;
  color: #333;
}
.btn-secondary:hover { background: #ddd; }

.btn-copy {
  background: #27ae60;
  color: #fff;
}
.btn-copy:hover { background: #219a52; }

.inline-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.inline-row input { flex: 1; }

/* ============================================================
   Toast
   ============================================================ */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(1rem);
  background: #333;
  color: #fff;
  padding: 0.6rem 1.25rem;
  border-radius: 6px;
  font-size: 0.875rem;
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
  z-index: 300;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ============================================================
   Modal
   ============================================================ */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 200;
  justify-content: center;
  align-items: center;
}

.modal-overlay.active { display: flex; }

.modal-content {
  background: #fff;
  border-radius: 12px;
  padding: 2rem;
  max-width: 520px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: #888;
  line-height: 1;
  padding: 0.25rem;
}

.modal-close:hover { color: #333; }

.modal-content h2 {
  font-size: 1.1rem;
  color: #222;
  margin-bottom: 1rem;
}

.modal-content ol {
  padding-left: 1.25rem;
  margin-bottom: 1rem;
}

.modal-content li {
  font-size: 0.875rem;
  line-height: 1.8;
  color: #444;
}

.modal-content a {
  color: #4a90d9;
  text-decoration: none;
}

.modal-content a:hover { text-decoration: underline; }

.modal-note {
  font-size: 0.8rem;
  color: #888;
  background: #f9f9f9;
  border-radius: 6px;
  padding: 0.75rem;
  line-height: 1.6;
}

/* ============================================================
   Tab 1: Template Generator
   ============================================================ */
.api-key-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.api-key-row input { flex: 1; }

.api-key-help {
  margin-top: 0.4rem;
}

.api-key-help a {
  font-size: 0.8rem;
  color: #4a90d9;
  text-decoration: none;
  cursor: pointer;
}

.api-key-help a:hover { text-decoration: underline; }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.form-grid .full-width {
  grid-column: 1 / -1;
}

.generated-output {
  display: none;
}

.generated-output.visible {
  display: block;
}

.generated-output textarea {
  height: 200px;
  margin-bottom: 0.75rem;
}

.output-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.mercari-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.5rem 1rem;
  background: #e74c3c;
  color: #fff;
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.8rem;
  transition: background 0.2s;
}

.mercari-link:hover { background: #c0392b; }

/* ============================================================
   Tab 2: Shipping & Profit
   ============================================================ */
.toggle-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.toggle-switch {
  position: relative;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: #ccc;
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.2s;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  left: 3px;
  bottom: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.2s;
}

.toggle-switch input:checked + .toggle-slider {
  background: #4a90d9;
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(20px);
}

.toggle-label {
  font-size: 0.85rem;
  color: #555;
}

.shipping-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.shipping-table th {
  background: #f8f8f8;
  padding: 0.5rem 0.6rem;
  text-align: left;
  font-weight: 600;
  color: #555;
  border-bottom: 2px solid #e0e0e0;
  white-space: nowrap;
}

.shipping-table td {
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid #eee;
}

.shipping-table .group-header td {
  background: #f0f6ff;
  font-weight: 600;
  color: #4a90d9;
  font-size: 0.78rem;
  padding: 0.4rem 0.6rem;
}

.shipping-table .best-profit {
  background: #eafaf1;
}

.shipping-table .negative {
  color: #e74c3c;
  font-weight: 600;
}

.shipping-table .positive {
  color: #27ae60;
}

.profit-input-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.profit-input-row label {
  font-size: 0.875rem;
  font-weight: 600;
  color: #555;
  white-space: nowrap;
}

.profit-input-row input {
  max-width: 200px;
}

.yen-suffix {
  font-size: 0.875rem;
  color: #555;
}

.size-inputs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.size-input-group label {
  display: block;
  font-size: 0.75rem;
  color: #888;
  margin-bottom: 0.25rem;
}

.badge-recommend {
  display: inline-block;
  background: #27ae60;
  color: #fff;
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  margin-left: 0.5rem;
  font-weight: 600;
}

.badge-anonymous {
  display: inline-block;
  background: #4a90d9;
  color: #fff;
  font-size: 0.65rem;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  margin-left: 0.3rem;
}

.not-fit-section {
  margin-top: 0.75rem;
}

.not-fit-toggle {
  background: none;
  border: none;
  color: #888;
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0.4rem 0;
  font-family: inherit;
}

.not-fit-toggle:hover { color: #555; }

.not-fit-list {
  display: none;
  list-style: none;
}

.not-fit-list.visible {
  display: block;
}

/* ============================================================
   Tab 4: Title Checker
   ============================================================ */
.title-input-area {
  position: relative;
}

.title-input-area input {
  font-size: 1.1rem;
  padding: 0.75rem;
}

.char-count-display {
  text-align: center;
  margin: 1rem 0;
}

.char-count-number {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1;
}

.char-count-label {
  font-size: 0.875rem;
  color: #888;
  margin-top: 0.25rem;
}

.progress-bar-track {
  width: 100%;
  height: 8px;
  background: #e0e0e0;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.2s, background 0.2s;
  background: #4a90d9;
}

.char-warning {
  font-size: 0.85rem;
  min-height: 1.2em;
  text-align: center;
  margin-bottom: 1rem;
}

.keyword-section {
  margin-top: 1rem;
}

.keyword-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.keyword-chip {
  display: inline-block;
  padding: 0.3rem 0.7rem;
  background: #f0f6ff;
  color: #4a90d9;
  border: 1px solid #d0e0f0;
  border-radius: 16px;
  font-size: 0.78rem;
  cursor: pointer;
  transition: background 0.15s;
  user-select: none;
}

.keyword-chip:hover {
  background: #d0e4ff;
}

/* ============================================================
   Tab 5: Photo Trimmer
   ============================================================ */
.drop-zone {
  border: 2px dashed #ccc;
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  color: #888;
  transition: border-color 0.2s, background 0.2s;
  cursor: pointer;
  margin-bottom: 1rem;
}

.drop-zone.dragover {
  border-color: #4a90d9;
  background: #f0f6ff;
}

.drop-zone-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.drop-zone-text {
  font-size: 0.9rem;
}

.drop-zone-sub {
  font-size: 0.75rem;
  color: #aaa;
  margin-top: 0.3rem;
}

.slider-controls {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  align-items: flex-end;
}

.slider-group {
  flex: 1;
  min-width: 140px;
}

.slider-group label {
  display: block;
  font-size: 0.8rem;
  color: #555;
  margin-bottom: 0.3rem;
}

.slider-group input[type="range"] {
  width: 100%;
  border: none;
  padding: 0;
}

.slider-value {
  font-size: 0.75rem;
  color: #888;
  text-align: right;
}

.slider-actions {
  display: flex;
  gap: 0.5rem;
  align-items: flex-end;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.photo-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  border: 3px solid transparent;
  transition: border-color 0.15s;
}

.photo-item.selected {
  border-color: #4a90d9;
}

.photo-item canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.photo-item .photo-remove {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 22px;
  height: 22px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 0.75rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.15s;
}

.photo-item:hover .photo-remove {
  opacity: 1;
}

.photo-item .photo-index {
  position: absolute;
  bottom: 4px;
  left: 4px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  font-size: 0.65rem;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
}

.download-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    transform: translateX(-100%);
    transition: transform 0.3s;
    box-shadow: 2px 0 8px rgba(0,0,0,0.1);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .fab {
    display: flex;
  }

  .content-area {
    padding: 1rem;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .size-inputs {
    grid-template-columns: repeat(2, 1fr);
  }

  .shipping-table {
    font-size: 0.75rem;
  }

  .photo-grid {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  }
}