:root{font-family:system-ui,Hiragino Sans,Noto Sans JP,sans-serif;--fg: #1a1a1a;--fg-muted: #666;--bg: #f4f4f5;--surface: #fff;--border: #d4d4d8;--accent: #1a1a1a;--accent-fg: #fff;--warning: #b45309;--error-bg: #fef2f2;--error-fg: #b91c1c;--error-border: #fecaca;--notice-bg: #f0fdf4;--notice-fg: #15803d;--notice-border: #bbf7d0;color:var(--fg);background:var(--bg)}@media(prefers-color-scheme:dark){:root{--fg: #e4e4e7;--fg-muted: #a1a1aa;--bg: #18181b;--surface: #27272a;--border: #3f3f46;--accent: #e4e4e7;--accent-fg: #18181b;--warning: #fbbf24;--error-bg: #391717;--error-fg: #fca5a5;--error-border: #7f1d1d;--notice-bg: #14291c;--notice-fg: #86efac;--notice-border: #14532d}}*{box-sizing:border-box}body{margin:0}main{max-width:1080px;margin:0 auto;padding:24px}header{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:24px}header h1{margin:0;font-size:1.5rem}.layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:32px;align-items:start}@media(max-width:900px){.layout{grid-template-columns:1fr}}.form{display:flex;flex-direction:column;gap:24px}.field{display:flex;flex-direction:column;gap:6px}.field .field{margin-top:4px}.field-label{font-size:.85rem;font-weight:600}.field-help{font-size:.78rem;color:var(--fg-muted)}.field-warning{font-size:.78rem;color:var(--warning)}.field input[type=text],.field input[type=url],.field textarea{font:inherit;color:inherit;padding:8px 10px;border:1px solid var(--border);border-radius:6px;background:var(--surface)}.field textarea{resize:vertical}.checkbox{display:flex;flex-direction:row;align-items:center;gap:8px;font-size:.9rem}.checkbox input{width:auto}button{font:inherit;color:inherit;cursor:pointer}button:focus-visible,input:focus-visible,textarea:focus-visible,.dropzone:focus-visible{outline:2px solid var(--fg);outline-offset:2px}.banner{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:10px 14px;margin-bottom:16px;border-radius:8px;font-size:.9rem}.banner button{flex-shrink:0;border:none;background:none;color:inherit;padding:0}.banner.error{background:var(--error-bg);color:var(--error-fg);border:1px solid var(--error-border)}.banner.notice{background:var(--notice-bg);color:var(--notice-fg);border:1px solid var(--notice-border)}.dropzone{display:flex;align-items:center;justify-content:center;min-height:96px;padding:16px;border:2px dashed var(--border);border-radius:8px;background:var(--surface);color:var(--fg-muted);font-size:.9rem;cursor:pointer;-webkit-user-select:none;user-select:none}.dropzone.dragover{border-color:var(--fg);color:var(--fg)}.picker{display:flex;gap:14px;align-items:flex-start;border-radius:8px}.picker.dragover{outline:2px dashed var(--fg);outline-offset:4px}.picker-canvas{width:150px;height:auto;border:1px solid var(--border);border-radius:6px;background:#fff;flex-shrink:0;touch-action:none}.picker-canvas.pannable{cursor:grab}.picker-canvas.pannable:active{cursor:grabbing}.picker-controls{display:flex;flex-direction:column;align-items:flex-start;gap:10px}.segmented{display:inline-flex;border:1px solid var(--border);border-radius:6px;overflow:hidden}.segmented button{border:none;background:var(--surface);padding:5px 12px;font-size:.8rem}.segmented button+button{border-left:1px solid var(--border)}.segmented button.active{background:var(--accent);color:var(--accent-fg)}.zoom{display:flex;align-items:center;gap:8px;font-size:.8rem;color:var(--fg-muted)}.picker-buttons{display:flex;gap:8px}button.small,button.secondary{padding:5px 12px;font-size:.8rem;border:1px solid var(--border);border-radius:6px;background:var(--surface)}button.secondary{font-size:.85rem;padding:7px 14px}.save-area{display:flex;flex-direction:column;align-items:flex-start;gap:8px}.save-area>button{font-weight:600;padding:10px 24px;border:none;border-radius:6px;background:var(--accent);color:var(--accent-fg)}.save-area>button:disabled{opacity:.45;cursor:default}.preview-pane{position:sticky;top:24px;display:flex;flex-direction:column;gap:24px}.preview-block h2{margin:0 0 8px;font-size:.85rem;font-weight:600;color:var(--fg-muted)}.device-frame{position:relative;width:280px;padding:14px;border-radius:14px;background:#2b2b2e;box-shadow:0 2px 8px #00000040}.device-frame canvas{display:block;width:100%;height:auto;background:#fff}.preview-empty{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;color:#999;font-size:.8rem}.share-canvas{display:block;width:100%;height:auto;border:1px solid var(--border);border-radius:6px;background:#fff}