:root{--primary:#4f46e5;--primary-light:#6366f1;--primary-dark:#4338ca;--bg:#f8fafc;--sidebar:#fff;--text:#1e293b;--text2:#64748b;--border:#e2e8f0;--card-shadow:0 1px 3px rgba(0,0,0,.06),0 1px 2px rgba(0,0,0,.04)}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Noto Sans SC',sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.5}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-dark)}

/* Layout */
.app{display:flex;min-height:100vh}
.sidebar{width:240px;background:var(--sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;height:100vh;z-index:100}
.main{margin-left:240px;flex:1;padding:24px 32px;max-width:1200px}

/* Sidebar */
.sidebar-header{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px}
.sidebar-logo{width:32px;height:32px;background:var(--primary);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:bold;font-size:18px}
.sidebar-title{font-size:16px;font-weight:700}
.nav-section{padding:12px 0}
.nav-label{font-size:11px;color:var(--text2);text-transform:uppercase;letter-spacing:.5px;padding:4px 20px 8px;font-weight:600}
.nav-item{display:flex;align-items:center;gap:10px;padding:8px 20px;color:var(--text2);transition:all .15s;cursor:pointer;font-size:13px}
.nav-item:hover{background:#f1f5f9;color:var(--text)}
.nav-item.active{background:#eef2ff;color:var(--primary);font-weight:500}
.nav-item svg{width:18px;height:18px;flex-shrink:0}
.nav-item .badge{margin-left:auto;font-size:10px;background:#fee2e2;color:#dc2626;padding:1px 6px;border-radius:10px}

/* User section */
.user-section{padding:12px 20px;border-top:1px solid var(--border);margin-top:auto;font-size:13px}
.user-section .btn{display:block;width:100%;padding:7px 0;text-align:center;border-radius:6px;font-size:13px;margin-top:6px}
.btn-primary{background:var(--primary);color:#fff;border:none;cursor:pointer}
.btn-primary:hover{background:var(--primary-dark)}
.btn-outline{border:1px solid var(--border);background:transparent;color:var(--text2);cursor:pointer}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}

/* Header */
.page-header{margin-bottom:24px}
.page-header h1{font-size:22px;font-weight:700;margin-bottom:4px}
.page-header p{color:var(--text2);font-size:14px}
.search-box{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:8px;font-size:14px;outline:none;transition:border .2s;margin-top:12px}
.search-box:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.1)}

/* Categories */
.cat-section{margin-bottom:32px}
.cat-header{display:flex;align-items:center;gap:8px;margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--border)}
.cat-header h2{font-size:15px;font-weight:600}
.cat-header span{font-size:12px;color:var(--text2)}
.cat-icon{width:28px;height:28px;border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:16px}

/* Tool Grid */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.tool-card{background:#fff;border:1px solid var(--border);border-radius:8px;padding:16px;cursor:pointer;transition:all .2s;position:relative;display:flex;flex-direction:column}
.tool-card:hover{border-color:var(--primary);box-shadow:0 4px 12px rgba(79,70,229,.1);transform:translateY(-1px)}
.tool-card .card-header{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.tool-card .card-icon{width:28px;height:28px;border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;flex-shrink:0}
.tool-card .card-name{font-size:13px;font-weight:600;color:var(--text);line-height:1.3}
.tool-card .card-desc{font-size:12px;color:var(--text2);line-height:1.5;margin:0}
.tool-card .vip-badge{position:absolute;top:6px;right:6px;font-size:9px;background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;padding:1px 5px;border-radius:4px;font-weight:600}
.tool-card .free-badge{position:absolute;top:6px;right:6px;font-size:9px;background:#e8f5e9;color:#2e7d32;padding:1px 5px;border-radius:4px}
.tool-card.locked{opacity:.6}
.tool-card.locked:hover{transform:none;border-color:var(--border);box-shadow:none}

/* Auth Pages */
.auth-page{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}
.auth-card{background:#fff;border-radius:12px;padding:32px;width:380px;box-shadow:0 4px 24px rgba(0,0,0,.08)}
.auth-card h1{font-size:20px;font-weight:700;text-align:center;margin-bottom:4px}
.auth-card .sub{text-align:center;color:var(--text2);font-size:13px;margin-bottom:24px}
.form-group{margin-bottom:14px}
.form-group label{display:block;font-size:12px;font-weight:500;color:var(--text2);margin-bottom:4px}
.form-group input{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:6px;font-size:14px;outline:none;transition:border .2s}
.form-group input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.1)}
.form-group .error{font-size:11px;color:#dc2626;margin-top:2px}
.auth-card .btn{width:100%;padding:10px;border-radius:6px;font-size:14px;font-weight:500;cursor:pointer;border:none;margin-top:4px}
.auth-link{text-align:center;font-size:13px;color:var(--text2);margin-top:16px}

/* Tool Page */
.tool-page{padding:0}
.tool-page .tool-header{margin-bottom:20px}
.tool-page .tool-header h1{font-size:20px;font-weight:700}
.tool-page .tool-header p{color:var(--text2);font-size:13px;margin-top:2px}
.tool-box{background:#fff;border:1px solid var(--border);border-radius:8px;padding:20px;margin-bottom:16px}
.tool-box label{display:block;font-size:12px;font-weight:500;color:var(--text2);margin-bottom:6px}
.tool-box textarea,.tool-box input[type=text]{width:100%;padding:10px;border:1px solid var(--border);border-radius:6px;font-size:13px;font-family:'SF Mono',Monaco,monospace;outline:none;resize:vertical;transition:border .2s;background:#fafafa}
.tool-box textarea:focus,.tool-box input:focus{border-color:var(--primary);background:#fff}
.tool-box textarea{min-height:120px}
.tool-box .row{display:flex;gap:10px;margin:10px 0;flex-wrap:wrap;align-items:center}
.tool-box .btns{display:flex;gap:8px;flex-wrap:wrap}
.tool-box .btn-sm{padding:6px 14px;border-radius:5px;font-size:12px;cursor:pointer;border:none;transition:opacity .15s}
.tool-box .btn-sm:hover{opacity:.9}
.tool-box .result{background:#f8fafc;border:1px solid var(--border);border-radius:6px;padding:10px;margin-top:10px;font-size:13px;font-family:'SF Mono',Monaco,monospace;word-break:break-all;max-height:300px;overflow:auto}
.tool-box .status{font-size:12px;color:var(--text2);margin-top:8px}
.tool-box .vip-required{padding:20px;text-align:center;background:#fffbeb;border:1px dashed #f59e0b;border-radius:6px;margin-top:10px;font-size:14px;color:#92400e}

/* Toast */
.toast{position:fixed;top:20px;right:20px;padding:12px 20px;border-radius:8px;color:#fff;font-size:13px;z-index:999;animation:slideIn .3s;box-shadow:0 4px 12px rgba(0,0,0,.15)}
.toast.success{background:#059669}
.toast.error{background:#dc2626}
.toast.info{background:var(--primary)}
@keyframes slideIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}

/* VIP Badge */
.vip-header{background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;padding:24px 32px;border-radius:8px;margin-bottom:24px}
.vip-header h2{font-size:18px}
.vip-header p{font-size:13px;opacity:.9;margin-top:4px}
.vip-plans{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;margin-bottom:24px}
.vip-plan{background:#fff;border:1px solid var(--border);border-radius:8px;padding:20px;text-align:center}
.vip-plan h3{font-size:16px;font-weight:600}
.vip-plan .price{font-size:28px;font-weight:700;color:var(--primary);margin:8px 0}
.vip-plan .price span{font-size:14px;color:var(--text2);font-weight:400}
.vip-plan ul{list-style:none;font-size:13px;color:var(--text2);margin:12px 0;line-height:2}
.vip-plan .btn{width:100%;padding:8px;border-radius:6px;font-size:13px;cursor:pointer;border:none}

/* Responsive */
@media(max-width:768px){.sidebar{display:none}.main{margin-left:0;padding:16px}.tool-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}}