:root{--bg: #15161a;--panel: #1e2026;--panel-2: #25272f;--border: #32353f;--text: #e7e9ee;--text-dim: #9aa0ac;--accent: #5b9dff;--accent-weak: #2a3a55;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Hiragino Sans,Noto Sans JP,sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}html,body,#root{margin:0;height:100%}body{background:var(--bg)}button{font-family:inherit;cursor:pointer}.app{display:grid;grid-template-columns:1fr 320px;height:100vh;overflow:hidden}.stage{display:flex;align-items:center;justify-content:center;padding:24px;overflow:hidden;background:repeating-conic-gradient(#1b1c21,#1b1c21 25%,#191a1f 0%,#191a1f 50%) 50% / 24px 24px}.stage-empty{width:100%;height:100%;display:flex;align-items:center;justify-content:center;border:2px dashed var(--border);border-radius:12px;color:var(--text-dim);font-size:15px;transition:border-color .15s,background .15s}.stage-empty.drag{border-color:var(--accent);background:var(--accent-weak);color:var(--text)}.preview-canvas{max-width:100%;max-height:100%;object-fit:contain;box-shadow:0 8px 30px #00000080}.panel{background:var(--panel);border-left:1px solid var(--border);padding:18px 16px;overflow-y:auto;display:flex;flex-direction:column;gap:22px}.panel h1{font-size:15px;font-weight:600;margin:0;letter-spacing:.02em}.section{display:flex;flex-direction:column;gap:10px}.section-title{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);font-weight:600}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.chip{background:var(--panel-2);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:8px 6px;font-size:13px;text-align:center;transition:border-color .12s,background .12s}.chip:hover{border-color:var(--accent)}.chip.active{border-color:var(--accent);background:var(--accent-weak)}.ratio-free{display:flex;align-items:center;gap:6px}.ratio-free input{width:100%;background:var(--panel-2);border:1px solid var(--border);border-radius:6px;color:var(--text);padding:7px 8px;font-size:13px;text-align:center}.ratio-free span{color:var(--text-dim)}.swatches{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}.swatch{aspect-ratio:1;border-radius:8px;border:2px solid var(--border);padding:0}.swatch.active{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-weak)}.color-group{display:flex;flex-direction:column;gap:6px}.color-group-label{font-size:10px;color:var(--text-dim);letter-spacing:.04em}.custom-color-row{display:flex;gap:8px}.custom-color-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:8px}.color-dot{width:18px;height:18px;border-radius:50%;border:1px solid rgba(255,255,255,.35);flex:none}.eyedropper-btn{flex:none;white-space:nowrap}.visually-hidden-input{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}.btn{background:var(--panel-2);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:10px;font-size:13px;font-weight:500}.btn:hover{border-color:var(--accent)}.btn-primary{background:var(--accent);border-color:var(--accent);color:#0c1422;font-weight:600}.btn-primary:hover{filter:brightness(1.05)}.btn-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}.meta{font-size:12px;color:var(--text-dim);line-height:1.5}.file-btn{display:block;text-align:center}.spacer{flex:1}.segmented{display:flex;gap:6px}.segmented .chip{flex:1}.text-input{width:100%;background:var(--panel-2);border:1px solid var(--border);border-radius:6px;color:var(--text);padding:8px;font-size:13px}.text-input.mono{font-family:ui-monospace,monospace}.text-input::placeholder{color:var(--text-dim)}.slider-row{display:flex;flex-direction:column;gap:6px;font-size:12px;color:var(--text-dim)}.slider-row input[type=range]{width:100%;accent-color:var(--accent)}.exif-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}.chip.dim{opacity:.45}.reset-link{align-self:flex-end;background:none;border:none;color:var(--text-dim);font-size:12px;padding:2px 4px}.reset-link:hover:not(:disabled){color:var(--accent)}.reset-link:disabled{opacity:.4;cursor:default}@media(max-width:720px){.app{grid-template-columns:1fr;grid-template-rows:1fr auto;height:100dvh}.panel{border-left:none;border-top:1px solid var(--border);max-height:55vh}.grid{grid-template-columns:repeat(4,1fr)}}