/* ========== Reset & Base ========== */
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;background:#f0f2f5;color:#333;overflow:hidden;height:100vh}
:root{--primary:#6366f1;--primary-hover:#4f46e5;--success:#22c55e;--warning:#f59e0b;--danger:#ef4444;--bg:#fff;--border:#e5e7eb;--text:#374151;--text-light:#9ca3af}

/* ========== Modal ========== */
.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);z-index:1000;display:flex;align-items:center;justify-content:center;backdrop-filter:blur(4px)}
.modal-overlay.hidden{display:none}
.modal-box{background:#fff;border-radius:16px;width:420px;max-width:90vw;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.15);animation:modalIn .3s ease}
@keyframes modalIn{from{transform:translateY(30px);opacity:0}to{transform:translateY(0);opacity:1}}
.modal-header{background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;padding:28px 24px;text-align:center}
.modal-header h2{font-size:20px;margin-bottom:6px}
.modal-header p{font-size:13px;opacity:.85}
.modal-body{padding:24px}
.modal-body input[type=text]{width:100%;padding:12px 16px;border:2px solid var(--border);border-radius:10px;font-size:18px;text-align:center;letter-spacing:3px;outline:none;transition:border .2s}
.modal-body input:focus{border-color:var(--primary)}
.modal-body .btn-primary{margin-top:12px;width:100%}
#keyMsg{margin-top:8px;font-size:13px;min-height:20px}
.modal-pricing{display:flex;gap:10px;margin-top:16px;padding-top:16px;border-top:1px solid var(--border)}
.price-card{flex:1;text-align:center;padding:12px 8px;border:2px solid var(--border);border-radius:10px;cursor:pointer;font-size:12px;transition:all .2s}
.price-card:hover{border-color:var(--primary);background:#f5f3ff}
.price-card.highlight{border-color:var(--primary);background:#f5f3ff;position:relative}
.price-card.highlight::after{content:"推荐";position:absolute;top:-10px;right:-10px;background:var(--warning);color:#fff;font-size:10px;padding:2px 6px;border-radius:4px}
.price-num{display:block;font-size:22px;font-weight:700;color:var(--primary)}
.price-card.highlight .price-num{color:#ef4444}
.modal-hint-buy{margin-top:12px;text-align:center;font-size:12px;color:var(--text-light)}

/* ========== Header ========== */
header{background:#fff;border-bottom:1px solid var(--border);padding:0 20px;height:52px;display:flex;align-items:center;justify-content:space-between;z-index:100;position:relative}
.logo{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:600}
.logo-icon{font-size:22px}
.header-right{display:flex;align-items:center;gap:12px;font-size:13px}
#userStatus{padding:4px 10px;border-radius:12px;font-size:12px;background:#fee2e2;color:#dc2626}
#userStatus.active{background:#dcfce7;color:#16a34a}

/* ========== Layout ========== */
.main-container{display:flex;height:calc(100vh - 52px)}
.control-panel{width:280px;min-width:280px;background:#fff;border-right:1px solid var(--border);overflow-y:auto;padding:12px}
.canvas-area{flex:1;display:flex;flex-direction:column;background:#e5e7eb;position:relative}
.stats-panel{width:260px;min-width:260px;background:#fff;border-left:1px solid var(--border);overflow-y:auto;padding:12px}

/* ========== Panel Sections ========== */
.panel-section{background:#f9fafb;border-radius:10px;padding:14px;margin-bottom:10px}
.panel-section h3{font-size:13px;color:var(--text);margin-bottom:10px}
.param-row{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.param-row label{font-size:12px;color:var(--text-light);min-width:70px}
.param-row input[type=range]{flex:1}
.param-row select{flex:1;padding:6px 8px;border:1px solid var(--border);border-radius:6px;font-size:12px;background:#fff}
.param-value{font-size:12px;font-weight:600;min-width:30px;text-align:center}
.checkbox-row label{display:flex;align-items:center;gap:6px;cursor:pointer;font-size:12px}
.checkbox-row input[type=checkbox]{accent-color:var(--primary)}
.preset-btns{display:flex;gap:6px;margin-top:8px}
.preset-btns button{flex:1;padding:6px;border:1px solid var(--border);border-radius:6px;background:#fff;font-size:11px;cursor:pointer;transition:.15s}
.preset-btns button:hover{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ========== Upload Zone ========== */
.upload-zone{border:2px dashed var(--border);border-radius:10px;overflow:hidden;cursor:pointer;transition:.2s;min-height:100px;display:flex;align-items:center;justify-content:center}
.upload-zone:hover{border-color:var(--primary);background:#f5f3ff}
.upload-placeholder{text-align:center;padding:20px}
.upload-icon{font-size:28px;margin-bottom:6px}
.upload-placeholder p{font-size:13px;color:var(--text)}
.upload-hint{font-size:11px!important;color:var(--text-light)!important;margin-top:4px}
.upload-preview img{max-width:100%;max-height:160px;object-fit:contain;display:block;padding:8px}

/* ========== Buttons ========== */
.btn-primary{background:linear-gradient(135deg,var(--primary),#8b5cf6);color:#fff;border:none;padding:10px 20px;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:.2s}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(99,102,241,.3)}
.btn-outline{background:#fff;color:var(--text);border:1px solid var(--border);padding:8px 16px;border-radius:8px;font-size:13px;cursor:pointer;transition:.2s}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-sm{padding:4px 12px;border:1px solid var(--border);border-radius:6px;background:#fff;font-size:12px;cursor:pointer;transition:.15s}
.btn-sm:hover{background:#f5f3ff;border-color:var(--primary)}
.btn-sm.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.full-width{width:100%;margin-bottom:6px}

/* ========== Canvas Toolbar ========== */
.canvas-toolbar{display:flex;align-items:center;gap:12px;padding:6px 12px;background:#fff;border-bottom:1px solid var(--border);flex-wrap:wrap}
.canvas-toolbar span{font-size:12px;color:var(--text-light)}
.toolbar-actions{display:flex;gap:4px}
.toolbar-hint{font-size:11px!important;color:var(--warning)!important}
.zoom-controls{display:flex;align-items:center;gap:4px;margin-left:auto}
.zoom-controls button{width:26px;height:26px;border:1px solid var(--border);border-radius:4px;background:#fff;cursor:pointer;font-size:13px}
#zoomLevel{font-size:12px;min-width:40px;text-align:center}

/* ========== Canvas ========== */
.canvas-wrapper{flex:1;display:flex;align-items:center;justify-content:center;overflow:auto;position:relative;cursor:grab}
.canvas-wrapper:active{cursor:grabbing}
.canvas-wrapper canvas{image-rendering:pixelated;image-rendering:crisp-edges}
.canvas-empty{position:absolute;pointer-events:none;text-align:center}
.canvas-empty .empty-icon{font-size:48px;margin-bottom:10px}
.canvas-empty p{font-size:14px;color:var(--text-light)}

/* ========== Stats Panel ========== */
.stats-summary{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.stat-item{text-align:center;padding:8px;background:#fff;border-radius:6px}
.stat-value{font-size:18px;font-weight:700;color:var(--primary)}
.stat-label{font-size:10px;color:var(--text-light)}

.color-list{max-height:45vh;overflow-y:auto}
.color-item{display:flex;align-items:center;gap:8px;padding:5px 8px;border-radius:6px;margin-bottom:3px;font-size:11px;cursor:pointer;transition:.15s}
.color-item:hover{background:#f3f4f6}
.color-swatch{width:22px;height:22px;border-radius:4px;border:1px solid #d1d5db;flex-shrink:0}
.color-info{flex:1;min-width:0}
.color-name{font-weight:500}
.color-count{color:var(--text-light);font-size:10px}
.color-code{font-weight:600;color:var(--primary);min-width:35px;text-align:right}

.manual-colors{display:flex;flex-wrap:wrap;gap:4px}
.manual-color-btn{width:28px;height:28px;border-radius:4px;border:2px solid transparent;cursor:pointer;transition:.15s;position:relative}
.manual-color-btn:hover,.manual-color-btn.selected{border-color:var(--primary);transform:scale(1.2);z-index:1}
.empty-hint{text-align:center;color:var(--text-light);font-size:12px;padding:20px 0}
.hint-sm{font-size:11px;color:var(--text-light);margin-top:6px;text-align:center}

/* ========== Toast ========== */
.toast{position:fixed;top:20px;left:50%;transform:translateX(-50%);background:#1f2937;color:#fff;padding:12px 24px;border-radius:8px;font-size:13px;z-index:2000;opacity:0;transition:opacity .3s;pointer-events:none}
.toast.show{opacity:1}
.toast.success{background:#16a34a}
.toast.error{background:#dc2626}

/* ========== Scrollbar ========== */
::-webkit-scrollbar{width:4px;height:4px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:#d1d5db;border-radius:2px}
::-webkit-scrollbar-thumb:hover{background:#9ca3af}

/* ========== Responsive ========== */
@media(max-width:1100px){.control-panel{width:240px;min-width:240px}.stats-panel{width:220px;min-width:220px}}
@media(max-width:800px){.main-container{flex-direction:column}.control-panel{width:100%;min-width:100%;max-height:35vh;display:flex;flex-wrap:wrap;gap:8px}.control-panel .panel-section{flex:1;min-width:150px;margin-bottom:0}.stats-panel{width:100%;min-width:100%}.canvas-area{flex:2}}