:root{--surface:#ffffff;--surface-muted:#f4f4f5;--border:#e4e4e7;--text-main:#18181b;--text-muted:#52525b;--primary:#6366f1;--primary-dark:#4f46e5;--accent:#22d3ee;--shadow-soft:0 12px 40px rgba(24,24,27,0.09);--gradient:linear-gradient(125deg,#6366f1 0%,#22d3ee 100%);--gc-surface:var(--surface);--gc-surface-soft:var(--surface-muted);--gc-panel:#f8fafc;--gc-line:var(--border);--gc-ink:var(--text-main);--gc-ink-soft:var(--text-muted);--gc-accent:var(--primary);--gc-accent-dark:var(--primary-dark);--gc-accent-soft:#a5b4fc;--gc-shadow:var(--shadow-soft);--gc-sheen:linear-gradient(130deg,color-mix(in srgb,var(--accent) 12%,var(--surface)) 0%,color-mix(in srgb,var(--primary) 8%,var(--surface-muted)) 100%);--gc-hist-bg:#1e293b;--gc-range-track:#e4e4e7;--gc-canvas-checker:#f4f4f5;}
.gc-page{position:relative;}
.gc-hero-meta{display:flex;gap:8px;flex-wrap:wrap;list-style:none;margin:0 0 0.5rem;padding:0;}
.gc-hero-meta li{margin:0;font-size:11px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--gc-ink-soft);background:var(--gc-surface);border:1px solid var(--gc-line);padding:6px 10px;border-radius:999px;}
.gc-workspace{padding:0.2rem 0 2rem;}
.gc-studio{background:var(--gc-surface);border:1px solid var(--gc-line);border-radius:20px;box-shadow:var(--gc-shadow);overflow:hidden;}
.gc-upload-card{padding:14px 14px 8px 14px;border-bottom:1px solid var(--gc-line);background:linear-gradient(160deg,var(--gc-sheen),var(--gc-surface));}
.gc-file-input{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none;}
.gc-dropzone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center;padding:26px 16px;border:2px dashed var(--gc-line);border-radius:16px;background:color-mix(in srgb,var(--surface) 88%,var(--surface-muted));cursor:pointer;transition:border-color .25s ease,box-shadow .25s ease;}
.gc-dropzone:focus-visible{outline:none;border-color:var(--gc-accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--gc-accent) 18%,transparent);}
.gc-dropzone.is-active{border-color:var(--gc-accent-dark);box-shadow:0 0 0 3px color-mix(in srgb,var(--gc-accent) 22%,transparent);background:color-mix(in srgb,var(--gc-surface) 90%,var(--gc-accent-soft));}
.gc-dropzone-icon{width:52px;height:52px;border-radius:14px;background:var(--gc-accent);color:#fff;display:grid;place-items:center;font-size:1.25rem;box-shadow:0 10px 24px color-mix(in srgb,var(--gc-accent) 35%,transparent);}
.gc-dropzone-title{font-size:1.02rem;font-weight:700;margin:0;color:var(--gc-ink);}
.gc-dropzone-copy{font-size:.86rem;color:var(--gc-ink-soft);margin:0;max-width:450px;line-height:1.45;}
.gc-status{margin:10px 0 0;font-size:.86rem;color:var(--gc-ink-soft);min-height:1.25rem;line-height:1.5;}
.gc-interface{display:none;padding:14px;gap:12px;}
.gc-studio.gc-has-image .gc-interface{display:grid;}
.gc-studio.gc-has-image .gc-upload-card{display:none;}
.gc-preview-grid{display:grid;gap:12px;}
.gc-preview-card{background:var(--gc-surface);border:1px solid var(--gc-line);border-radius:16px;overflow:hidden;min-height:220px;}
.gc-preview-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:10px 12px;background:var(--gc-surface-soft);border-bottom:1px solid var(--gc-line);}
.gc-preview-title{margin:0;font-size:.75rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--gc-ink-soft);}
.gc-preview-meta{margin:0;font-size:.75rem;color:var(--gc-ink-soft);}
.gc-canvas-frame{position:relative;display:flex;align-items:center;justify-content:center;min-height:240px;padding:12px;background:repeating-linear-gradient(45deg,var(--gc-canvas-checker) 0,var(--gc-canvas-checker) 8px,transparent 8px,transparent 16px);background-size:16px 16px;}
.gc-canvas{max-width:100%;height:auto;display:none;}
.gc-placeholder{position:absolute;text-align:center;color:var(--gc-ink-soft);font-size:.84rem;max-width:280px;line-height:1.5;pointer-events:none;}
.gc-histogram{display:block;width:100%;height:74px;border-top:1px solid var(--gc-line);background:var(--gc-hist-bg);color:var(--gc-accent);}
.gc-control-card{background:var(--gc-panel);border:1px solid var(--gc-line);border-radius:16px;padding:14px;display:flex;flex-direction:column;gap:12px;}
.gc-control-title{margin:0;font-size:.95rem;font-weight:700;color:var(--gc-ink);letter-spacing:.02em;}
.gc-range-block{display:grid;gap:8px;padding-bottom:4px;}
.gc-range-top{display:flex;justify-content:space-between;align-items:center;gap:12px;}
.gc-range-label{margin:0;font-size:.84rem;font-weight:600;color:var(--gc-ink);}
.gc-range-value{font-variant-numeric:tabular-nums;font-size:.86rem;color:var(--gc-accent-dark);font-weight:700;min-width:48px;text-align:right;}
.gc-range{appearance:none;width:100%;height:7px;border-radius:999px;outline:none;background:var(--gc-range-track);accent-color:var(--gc-accent);}
.gc-range::-webkit-slider-thumb{appearance:none;width:16px;height:16px;border-radius:50%;background:var(--gc-accent);border:2px solid var(--surface);box-shadow:0 4px 12px color-mix(in srgb,var(--primary) 35%,transparent);}
.gc-range-range{display:flex;justify-content:space-between;font-size:.75rem;color:var(--gc-ink-soft);}
.gc-note-line{margin:2px 0 0;font-size:.79rem;color:var(--gc-ink-soft);line-height:1.5;}
.gc-preset-row{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;}
.gc-preset{border:1px solid var(--gc-line);background:var(--gc-surface);color:var(--gc-ink);font-size:.8rem;font-weight:600;padding:10px;border-radius:10px;transition:background .15s ease,border-color .15s ease,color .15s ease;cursor:pointer;}
.gc-preset.is-active,.gc-preset:focus-visible,.gc-preset:hover{border-color:var(--gc-accent);background:color-mix(in srgb,var(--gc-accent-soft) 18%,var(--gc-surface));color:var(--gc-accent-dark);}
.gc-action-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;}
.gc-btn{display:inline-flex;align-items:center;justify-content:center;font-size:.875rem;font-weight:700;padding:10px 12px;border-radius:12px;border:none;color:#fff;cursor:pointer;}
.gc-btn-primary{background:var(--gc-accent);box-shadow:0 10px 24px color-mix(in srgb,var(--gc-accent) 32%,transparent);}
.gc-btn-ghost{background:var(--gc-surface);color:var(--gc-ink);border:1px solid var(--gc-line);}
.gc-live-stats{margin:4px 0 0;color:var(--gc-ink-soft);font-size:.78rem;line-height:1.45;}
.gc-article{margin-top:1rem;}
.gc-article h2{font-size:clamp(1.5rem,4vw,2rem);font-weight:700;color:var(--gc-ink);margin:1.5rem 0 .8rem;}
.gc-article p{font-size:.97rem;color:var(--gc-ink-soft);line-height:1.65;margin:0 0 1rem;}
.gc-article h2 + p,.gc-article p + p{margin-top:0;}
.gc-article ul,.gc-article ol{margin:0 0 1rem;padding-left:1.15rem;}
.gc-article li{margin-bottom:.5rem;color:var(--gc-ink-soft);line-height:1.55;font-size:.95rem;}
.gc-tip{margin:1.25rem 0;padding:14px;border:1px solid color-mix(in srgb,var(--gc-accent) 25%,var(--gc-line));border-left:4px solid var(--gc-accent);border-radius:12px;background:var(--gc-surface-soft);}
.gc-tip-title{font-weight:700;margin:0 0 .4rem;color:var(--gc-ink);}
.gc-table-wrap{overflow-x:auto;margin:0 0 1rem;border-radius:14px;border:1px solid var(--gc-line);}
.gc-table{width:100%;border-collapse:collapse;background:var(--gc-surface);font-size:.86rem;}
.gc-table th,.gc-table td{padding:11px 12px;border-bottom:1px solid var(--gc-line);text-align:left;}
.gc-table th{background:var(--gc-surface-soft);font-weight:700;color:var(--gc-ink);}
.gc-table td{color:var(--gc-ink-soft);}
.gc-table tr:last-child td{border-bottom:none;}
.gc-stacked-list{padding-left:1.1rem;}
.gc-stacked-list li{margin-bottom:.55rem;}
.gc-stacked-list li:last-child{margin-bottom:0;}
@media (max-width: 767px){.gc-workspace{padding:0.2rem 0 1.2rem;}.gc-histogram{height:64px;}.gc-preview-grid{gap:10px;}.gc-control-card{padding:12px;}.gc-action-row{gap:6px;}.gc-btn{font-size:.83rem;}.gc-action-row .gc-btn{padding:10px 6px;font-size:.72rem;}.gc-article h2{font-size:1.45rem;}.gc-article p{font-size:.95rem;}}
@media (min-width: 900px){.gc-interface{grid-template-columns:1fr;}.gc-preview-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;}.gc-canvas-frame{min-height:260px;}.gc-preset-row{grid-template-columns:repeat(5,1fr);}.gc-control-card{position:static;top:auto;align-self:stretch;}}
@media (min-width: 1200px){.gc-studio{padding:0;}.gc-upload-card{padding:16px 16px 10px;}.gc-interface{padding:14px 14px 16px;}.gc-preview-card{min-height:360px;}}