:root{color-scheme:dark;--bg-0: #08111c;--bg-1: #0d1d2d;--bg-2: #17344f;--panel: rgba(8, 16, 26, .8);--panel-border: rgba(172, 205, 235, .18);--panel-strong: rgba(255, 255, 255, .08);--text: #ecf3fb;--muted: #8ca0b3;--accent: #8fd3ff;--accent-strong: #4bb4ff;--accent-warm: #ffd79a;--success: #92df9a;--shadow: 0 28px 90px rgba(0, 0, 0, .38)}*{box-sizing:border-box}body{margin:0;overflow:hidden;font-family:Avenir Next,PingFang SC,Noto Sans SC,sans-serif;background:radial-gradient(circle at top,rgba(120,187,255,.2),transparent 34%),radial-gradient(circle at 80% 18%,rgba(255,214,152,.15),transparent 24%),linear-gradient(180deg,var(--bg-2) 0%,var(--bg-1) 36%,var(--bg-0) 100%);color:var(--text)}.app-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:radial-gradient(circle at 30% 16%,rgba(255,255,255,.16),transparent 18%),radial-gradient(circle at 72% 12%,rgba(143,211,255,.12),transparent 20%);pointer-events:none}#canvas-container{width:100vw;height:100vh}#canvas-container canvas{display:block}#ui-container{position:absolute;top:16px;left:16px;z-index:100;max-width:340px;padding:16px;border-radius:22px;border:1px solid var(--panel-border);background:linear-gradient(180deg,#0b1421e6,#070e18bd);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.ui-header{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;padding-bottom:12px;border-bottom:1px solid rgba(255,255,255,.08)}.eyebrow{margin:0 0 4px;color:var(--accent-warm);font-size:10px;letter-spacing:.18em;text-transform:uppercase}h3{margin:0;font-size:21px;font-weight:700;line-height:1.1;color:var(--text)}#ui-panel-body{margin-top:14px}#ui-container.collapsed #ui-panel-body{display:none}.input-group{margin-bottom:14px}.advanced-panel{margin-bottom:14px;border:1px solid rgba(255,255,255,.08);border-radius:16px;background:#ffffff08}label{display:block;margin-bottom:6px;font-weight:600;font-size:12px;color:#cfe0f2}.highlight-label,.preview-label,.export-label{color:var(--accent)}input[type=file]{width:100%;padding:10px;border-radius:12px;border:1px dashed rgba(255,255,255,.14);background:#ffffff08;font-size:12px;color:var(--muted)}.filter-grid{display:grid;grid-template-columns:20px 20px 56px 1fr;gap:7px;align-items:center;font-size:12px}select,input[type=number]{width:100%;padding:8px 10px;border:1px solid rgba(255,255,255,.14);border-radius:10px;background:#040a12d9;color:var(--text);font-family:SFMono-Regular,Consolas,monospace;font-size:12px}input[type=number]:focus,select:focus,input[type=file]:focus{outline:1px solid var(--accent-strong);border-color:var(--accent-strong)}.checkbox-wrapper{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;border:1px solid rgba(255,255,255,.08);border-radius:12px;background:#ffffff08}.checkbox-wrapper label,.filter-alpha-label{margin:0;cursor:pointer;color:var(--text)}input[type=checkbox]{width:16px;height:16px;margin:0;cursor:pointer;accent-color:var(--accent-strong)}button{width:100%;margin-top:8px;padding:12px;border:none;border-radius:14px;background:linear-gradient(135deg,#67c7ff,#2d86cf);color:#04111f;cursor:pointer;font-size:13px;font-weight:700;letter-spacing:.01em;box-shadow:0 12px 28px #2d86cf42;transition:transform .14s ease,filter .14s ease,box-shadow .14s ease}button:hover{filter:brightness(1.05);box-shadow:0 16px 34px #2d86cf57}button:active{transform:translateY(1px)}button:disabled{background:#ffffff1f;color:#ecf3fb73;box-shadow:none;cursor:not-allowed;transform:none}.ui-toggle{width:auto;margin-top:0;padding:7px 12px;border:1px solid rgba(255,255,255,.12);border-radius:999px;background:#ffffff0f;color:var(--text);box-shadow:none}.advanced-summary{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 14px;cursor:pointer;list-style:none;color:var(--text);font-size:12px;-webkit-user-select:none;user-select:none}.advanced-summary::-webkit-details-marker{display:none}.advanced-summary:after{content:"展开";color:var(--accent);font-size:11px;letter-spacing:.06em}.advanced-panel[open] .advanced-summary:after{content:"收起"}.advanced-summary-title{font-weight:700}.advanced-summary-hint,.hint{color:var(--muted);font-size:11px;line-height:1.45}.advanced-body{margin:0 14px 14px;padding-top:12px;border-top:1px solid rgba(255,255,255,.08)}.filter-panel,.preview-panel{padding:10px;border:1px solid rgba(255,255,255,.08);border-radius:14px;background:#ffffff08}.filter-alpha-row{display:flex;align-items:center;gap:8px;margin-bottom:10px}.channel-label{font-weight:700}.channel-r{color:#ff8f8f}.channel-g{color:#9ef4af}.channel-b{color:#8ec7ff}.export-button{background:linear-gradient(135deg,#b9f0b4,#66be73);color:#09200a;box-shadow:0 12px 26px #66be7338}.export-panel{margin-top:16px}.export-group{display:grid;grid-template-columns:1fr 1fr 1fr;gap:6px;margin-top:8px}.export-group button{margin-top:0;padding:10px 8px;font-size:11px}.preview-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.preview-card{padding:8px;border:1px solid rgba(255,255,255,.08);border-radius:12px;background:#ffffff08}.preview-canvas-shell{position:relative;min-height:160px;overflow:hidden;border-radius:8px}.preview-card-title{display:block;margin-bottom:6px;color:#c8e6ff;font-size:11px;font-weight:700;letter-spacing:.06em}.preview-card canvas{display:block;width:100%;height:160px;border-radius:8px;background:linear-gradient(45deg,rgba(255,255,255,.04) 25%,transparent 25%,transparent 75%,rgba(255,255,255,.04) 75%),linear-gradient(45deg,rgba(255,255,255,.04) 25%,transparent 25%,transparent 75%,rgba(255,255,255,.04) 75%),linear-gradient(180deg,#050a12e6,#0e1c2cc7);background-position:0 0,8px 8px,0 0;background-size:16px 16px,16px 16px,auto;image-rendering:pixelated}.preview-placeholder{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;padding:16px;text-align:center;color:var(--muted);font-size:11px;letter-spacing:.03em;pointer-events:none}.preview-card.has-image .preview-placeholder{display:none}#status{min-height:22px;margin-top:12px;padding:10px 12px;border:1px solid rgba(255,255,255,.08);border-radius:12px;background:#ffffff08;color:var(--accent-warm);font-size:12px;line-height:1.45}@media (max-width: 640px){#ui-container{top:12px;left:12px;max-width:min(340px,calc(100vw - 24px));padding:14px}.preview-grid{grid-template-columns:1fr}}