:root {
  --bg-page: #ffffff;
  --bg-tint: #fff3f8;
  --panel: #ffffff;
  --panel-border: #f4c9dc;
  --text: #1a1418;
  --text-dim: #7a6a72;
  --accent: #ff3d81;
  --accent-dark: #d81b60;
  --accent-soft: #ffe3ee;
  --danger: #ef4767;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, var(--bg-tint), var(--bg-page) 55%);
  color: var(--text);
  font-family: "Hiragino Sans", "Yu Gothic", "Segoe UI", sans-serif;
  line-height: 1.6;
}

.site-header {
  text-align: center;
  padding: 2.5rem 1rem 1.5rem;
}

.site-header h1 {
  margin: 0;
  font-size: 1.9rem;
  letter-spacing: 0.05em;
  color: var(--accent);
}

.subtitle {
  margin: 0.5rem 0 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.layout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
    padding: 0 1rem 2.5rem;
    gap: 1.1rem;
  }
}

.column {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

@media (max-width: 860px) {
  .column {
    gap: 1.1rem;
  }
}

.column-preview {
  position: sticky;
  top: 1.5rem;
}

@media (max-width: 860px) {
  .column-preview {
    position: static;
  }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 1.5rem;
  box-shadow: 0 10px 30px rgba(216, 27, 96, 0.08);
}

@media (max-width: 480px) {
  .panel {
    padding: 1.1rem;
    border-radius: 12px;
  }
}

.panel h2 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
}

.step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.7rem;
  height: 1.7rem;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
}

.hint {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin: 0.3rem 0 1rem;
}

.dropzone {
  border: 2px dashed var(--panel-border);
  border-radius: 10px;
  padding: 2rem 1rem;
  text-align: center;
  color: var(--text-dim);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.dropzone:hover,
.dropzone:focus-visible {
  border-color: var(--accent);
  outline: none;
}

.dropzone.dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--text);
}

.msg {
  color: var(--danger);
  font-size: 0.85rem;
  min-height: 1.2em;
  margin: 0.6rem 0 0;
}

.count {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin: 0.4rem 0 0.8rem;
  text-align: right;
}

.image-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 0.75rem;
}

.image-item {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--panel-border);
  background: #000;
  touch-action: pan-y;
}

.image-item.dragging {
  opacity: 0.5;
  outline: 2px solid var(--accent);
}

.image-item img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

body.orientation-portrait .image-item img {
  aspect-ratio: 9 / 16;
}

.orientation-toggle {
  display: flex;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  overflow: hidden;
}

.orientation-btn {
  flex: 1;
  padding: 0.55rem 0.5rem;
  border: none;
  background: #fff;
  color: var(--text-dim);
  font-size: 0.85rem;
  cursor: pointer;
}

.orientation-btn + .orientation-btn {
  border-left: 1px solid var(--panel-border);
}

.orientation-btn.is-active {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}

.drag-handle {
  position: absolute;
  top: 0.3rem;
  left: 0.3rem;
  width: 1.9rem;
  height: 1.9rem;
  border: none;
  border-radius: 6px;
  background: rgba(20, 15, 20, 0.55);
  color: #fff;
  font-size: 1rem;
  line-height: 1;
  cursor: grab;
  touch-action: none;
}

.drag-handle:active {
  cursor: grabbing;
}

.image-item-controls {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 0.3rem;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0) 40%, rgba(0, 0, 0, 0.65));
  transition: opacity 0.15s;
  pointer-events: none;
}

.image-item-controls button {
  pointer-events: auto;
}

@media (hover: hover) and (pointer: fine) {
  .image-item-controls {
    opacity: 0;
  }

  .image-item:hover .image-item-controls,
  .image-item:focus-within .image-item-controls {
    opacity: 1;
  }
}

.image-item-controls button {
  width: 1.9rem;
  height: 1.9rem;
  border: none;
  border-radius: 4px;
  background: rgba(20, 15, 20, 0.75);
  color: #fff;
  cursor: pointer;
  font-size: 0.8rem;
}

.image-item-controls button:disabled {
  opacity: 0.3;
  cursor: default;
}

.image-item-controls .remove-btn {
  margin-left: auto;
  background: var(--danger);
  color: #fff;
}

.field {
  margin-bottom: 1.1rem;
}

.field label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 0.4rem;
}

.field input[type="text"] {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: #fff;
  color: var(--text);
  font-size: 0.95rem;
}

.field input[type="text"]:focus,
.field select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.field input[type="color"] {
  width: 100%;
  height: 2.4rem;
  padding: 0.2rem;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: #fff;
  cursor: pointer;
}

.field input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.field select {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: #fff;
  color: var(--text);
  font-size: 0.95rem;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.canvas-wrap {
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--panel-border);
  background: #000;
}

#preview-canvas {
  display: block;
  width: 100%;
  height: auto;
}

#generate-btn {
  width: 100%;
  padding: 0.85rem;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

#generate-btn:hover:not(:disabled) {
  background: var(--accent-dark);
  transform: translateY(-1px);
}

#generate-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

.progress-wrap {
  margin-top: 1rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.progress-wrap[hidden] {
  display: none;
}

.progress-wrap progress {
  flex: 1;
  height: 0.6rem;
  accent-color: var(--accent);
}

.progress-wrap span {
  color: var(--text-dim);
  font-size: 0.85rem;
  min-width: 3em;
  text-align: right;
}

.result-wrap {
  margin-top: 1.2rem;
  text-align: center;
}

.result-wrap img {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.7rem;
  margin-top: 0.9rem;
}

.download-link,
.share-btn {
  display: inline-block;
  padding: 0.6rem 1.4rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
}

.share-btn[hidden] {
  display: none;
}

.download-link {
  background: var(--text);
  color: #fff;
}

.download-link:hover {
  background: var(--accent-dark);
}

.share-btn {
  background: var(--accent);
  color: #fff;
}

.share-btn:hover {
  background: var(--accent-dark);
}

.hashtag-row {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0.6rem;
  margin-top: 0.8rem;
  flex-wrap: wrap;
}

.hashtag-row span {
  font-size: 0.85rem;
  color: var(--text-dim);
  white-space: pre-line;
  text-align: left;
  word-break: break-all;
}

.copy-btn {
  border: 1px solid var(--panel-border);
  background: #fff;
  color: var(--accent-dark);
  border-radius: 6px;
  padding: 0.25rem 0.7rem;
  font-size: 0.78rem;
  cursor: pointer;
}

.copy-btn:hover {
  background: var(--accent-soft);
}

.site-footer {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
  padding: 1.5rem 1rem 2.5rem;
}

.feedback-link {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.4rem 1rem;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  color: var(--accent-dark);
  text-decoration: none;
  font-size: 0.78rem;
}

.feedback-link:hover {
  background: var(--accent-soft);
}

.site-footer .version {
  margin-top: 0.6rem;
  margin-bottom: 0;
  font-size: 0.72rem;
  color: var(--accent-dark);
  font-weight: 600;
  letter-spacing: 0.03em;
}

.site-footer .copyright {
  margin-top: 0.3rem;
  font-size: 0.72rem;
  letter-spacing: 0.02em;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal[hidden] {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(20, 10, 15, 0.55);
}

.modal-panel {
  position: relative;
  background: #fff;
  border-radius: 14px;
  padding: 1.5rem;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-panel h3 {
  margin: 0 0 1rem;
  font-size: 1.05rem;
  color: var(--text);
}

.adjust-canvas-wrap {
  cursor: grab;
  touch-action: none;
}

.adjust-canvas-wrap:active {
  cursor: grabbing;
}

#adjust-canvas {
  display: block;
  width: 100%;
  height: auto;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
  margin-top: 1rem;
}