:root{--color-bg: #f8f9fa;--color-surface: #ffffff;--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-text: #1e293b;--color-text-muted: #64748b;--color-border: #e2e8f0;--color-success: #16a34a;--color-warning: #d97706;--color-danger: #dc2626;--radius: 8px;--shadow-sm: 0 1px 2px rgba(0,0,0,.05);--shadow-md: 0 4px 6px -1px rgba(0,0,0,.1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.6}.nav{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:56px;background:var(--color-surface);border-bottom:1px solid var(--color-border);box-shadow:var(--shadow-sm)}.nav-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--color-primary);text-decoration:none}.nav-brand span{font-size:12px;color:var(--color-text-muted);font-weight:400}.nav-links{display:flex;gap:24px;list-style:none}.nav-links a{text-decoration:none;color:var(--color-text-muted);font-size:14px;font-weight:500;transition:color .15s}.nav-links a:hover,.nav-links a.active{color:var(--color-primary)}.nav-user{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--color-text-muted)}.nav-user button{background:none;border:1px solid var(--color-border);border-radius:var(--radius);padding:6px 14px;font-size:13px;cursor:pointer;color:var(--color-text-muted);transition:border-color .15s}.nav-user button:hover{border-color:var(--color-primary);color:var(--color-primary)}.page{max-width:1200px;margin:32px auto;padding:0 24px}.page-title{font-size:24px;font-weight:700;margin-bottom:8px}.page-subtitle{font-size:14px;color:var(--color-text-muted);margin-bottom:24px}.state-container{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:64px 24px;text-align:center}.state-icon{font-size:48px;margin-bottom:16px}.state-title{font-size:18px;font-weight:600;margin-bottom:8px}.state-message{font-size:14px;color:var(--color-text-muted);margin-bottom:24px;max-width:400px}.btn-primary{background:var(--color-primary);color:#fff;border:none;border-radius:var(--radius);padding:10px 20px;font-size:14px;font-weight:500;cursor:pointer;transition:background .15s}.btn-primary:hover{background:var(--color-primary-hover)}.spinner{width:40px;height:40px;border:3px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite;margin-bottom:16px}@keyframes spin{to{transform:rotate(360deg)}}.login-page{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;gap:24px}.login-page h1{font-size:32px;font-weight:700;color:var(--color-primary)}.login-page p{color:var(--color-text-muted);font-size:16px}