/* ai-tools/style.css */
:root{--primary:#3ecf8e;--primary-dark:#2aad72;--primary-light:#d2f5e8;--bg:#f4f6f9;--bg-white:#fff;--border:#e2e8f0;--text-main:#1a202c;--text-sub:#64748b;--text-light:#94a3b8;--radius-md:10px;--shadow-sm:0 1px 3px rgba(0,0,0,.08);--transition:all .2s ease}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text-main);font-size:15px;line-height:1.6;min-height:100vh}
a{text-decoration:none;color:inherit}
#header{position:sticky;top:0;z-index:100;height:64px;background:var(--bg-white);border-bottom:1px solid var(--border);box-shadow:var(--shadow-sm);display:flex;align-items:center;padding:0 24px;gap:20px}
.header-logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700}.logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));border-radius:6px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px}.hl{color:var(--primary-dark)}
#main-content{max-width:900px;margin:0 auto;padding:32px 20px 40px}
.hero{text-align:center;margin-bottom:24px}.hero-icon{font-size:64px;margin-bottom:8px}.hero h1{font-size:28px;font-weight:800;margin-bottom:6px}.hero p{font-size:15px;color:var(--text-sub)}

/* Tab 切换 */
.tab-bar{display:flex;gap:4px;background:var(--bg-white);border-radius:var(--radius-md);padding:4px;margin-bottom:24px;box-shadow:var(--shadow-sm)}
.tab-bar .tab{flex:1;padding:10px 16px;border:none;background:transparent;border-radius:8px;font-size:14px;font-weight:600;color:var(--text-sub);cursor:pointer;transition:var(--transition)}
.tab-bar .tab.active{background:var(--primary);color:#fff;box-shadow:0 2px 8px rgba(62,207,142,.3)}
.tab-bar .tab:hover:not(.active){color:var(--text-main);background:#f8fafc}

/* 面板 */
.tool-panel{display:none}.tool-panel.active{display:block}

/* 上传区 */
.upload-area{border:2px dashed var(--border);border-radius:12px;padding:48px 24px;text-align:center;cursor:pointer;transition:var(--transition);position:relative}
.upload-area:hover,.upload-area.dragover{border-color:var(--primary);background:#f0fdf7}
.upload-area.dragover{box-shadow:0 0 0 3px rgba(62,207,142,.2);border-style:solid}
.upload-area input[type=file]{position:absolute;inset:0;opacity:0;cursor:pointer}
.ua-icon{font-size:56px;margin-bottom:12px}.ua-title{font-size:16px;font-weight:700;margin-bottom:6px}.ua-hint{font-size:13px;color:var(--text-light)}

/* 工具栏 */
.toolbar,.bg-toolbar{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--bg-white);border-radius:var(--radius-md);margin-bottom:12px;flex-wrap:wrap;box-shadow:var(--shadow-sm)}
.tool-group{display:flex;align-items:center;gap:8px}
.tool-group.hidden{display:none}
.tb-btn{padding:6px 14px;border:1px solid var(--border);background:var(--bg-white);border-radius:6px;font-size:13px;cursor:pointer;transition:var(--transition);font-weight:500;white-space:nowrap}
.tb-btn:hover{border-color:var(--primary);color:var(--primary-dark)}
.tb-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.tb-btn.tb-secondary{background:#f1f5f9;border-color:#e2e8f0}
.tb-btn.tb-secondary:hover{background:#e2e8f0}
.tb-btn-primary{padding:6px 16px;background:var(--primary);color:#fff;border:none;border-radius:6px;font-size:13px;font-weight:600;cursor:pointer;transition:var(--transition);white-space:nowrap}
.tb-btn-primary:hover{background:var(--primary-dark)}
.tb-label{font-size:12px;color:var(--text-sub);font-weight:600}
.toolbar input[type=range],.bg-toolbar input[type=range]{width:80px;accent-color:var(--primary)}
.toolbar input[type=color],.bg-toolbar input[type=color]{width:32px;height:28px;border:1px solid var(--border);border-radius:4px;cursor:pointer;padding:2px}
.toolbar span[id$=Val],.bg-toolbar span[id$=Val]{font-size:12px;color:var(--primary-dark);font-weight:600;min-width:36px}

/* Canvas 容器 */
.canvas-wrap{background:var(--bg-white);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);overflow:hidden;display:flex;align-items:center;justify-content:center;min-height:200px}
.canvas-wrap canvas{max-width:100%;height:auto;display:block}
.workspace-hint{margin-top:8px;font-size:12px;color:var(--text-light);text-align:center}

/* 隐藏初始状态 */
#cutout-workspace.hidden,#bg-workspace.hidden,#enhance-workspace.hidden{display:none}

/* 增强面板布局 */
.enhance-layout{display:grid;grid-template-columns:280px 1fr;gap:16px}
.enhance-controls{background:var(--bg-white);border-radius:var(--radius-md);padding:20px;box-shadow:var(--shadow-sm)}
.enhance-controls h3{font-size:15px;margin-bottom:16px}
.slider-group{margin-bottom:14px}
.slider-group label{display:block;font-size:12px;font-weight:600;color:var(--text-sub);margin-bottom:4px}
.slider-row{display:flex;align-items:center;gap:8px}
.slider-row input[type=range]{flex:1;accent-color:var(--primary)}
.slider-row span{font-size:12px;font-weight:600;color:var(--primary-dark);min-width:32px;text-align:right}
.enhance-actions{display:flex;flex-direction:column;gap:8px;margin-top:20px}
.enhance-preview{display:flex;flex-direction:column;align-items:center}
.compare-hint{font-size:12px;color:var(--text-light);margin-top:8px;text-align:center}

/* 响应式 */
@media(max-width:768px){
  .enhance-layout{grid-template-columns:1fr}
  .toolbar,.bg-toolbar{flex-direction:column;align-items:flex-start}
  .enhance-controls{order:2}.enhance-preview{order:1}
}
@media(max-width:480px){
  #header{padding:0 12px;gap:8px}
  #main-content{padding:16px 10px 32px}
  .hero-icon{font-size:48px}.hero h1{font-size:22px}
  .tab-bar .tab{font-size:12px;padding:8px 10px}
  .upload-area{padding:32px 16px}
  .ua-icon{font-size:40px}
}