*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #f5f6fa;--sidebar: #1e1e2e;--sidebar-text: #cdd6f4;--sidebar-active: #89b4fa;--card: #ffffff;--border: #e2e8f0;--text: #1e293b;--hint: #64748b;--primary: #3b82f6;--primary-hover: #2563eb;--danger: #ef4444;--success: #22c55e}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);font-size:14px}button{cursor:pointer;border:none;outline:none}input,textarea,select{outline:none;font-family:inherit;font-size:14px}a{text-decoration:none;color:inherit}.btn{padding:8px 16px;border-radius:8px;font-size:14px;font-weight:500;transition:background .2s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-danger{background:var(--danger);color:#fff}.btn-ghost{background:transparent;color:var(--hint);border:1px solid var(--border)}.btn-ghost:hover{background:var(--bg)}.btn:disabled{opacity:.5;cursor:not-allowed}.input{width:100%;padding:9px 12px;border:1px solid var(--border);border-radius:8px;background:#fff;color:var(--text)}.input:focus{border-color:var(--primary)}.card{background:var(--card);border-radius:12px;border:1px solid var(--border);padding:20px}.error-msg{color:var(--danger);font-size:13px;margin-top:6px}