.header{display:flex;align-items:center;justify-content:space-between;padding:0 var(--spacing-lg);height:60px;background-color:var(--color-primary);color:var(--color-white);box-shadow:var(--shadow-sm)}.header-brand a{font-size:1.25rem;font-weight:700;color:var(--color-white);text-decoration:none}.header-nav{display:flex;gap:var(--spacing-md)}.nav-link{color:var(--color-white);text-decoration:none;padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-sm);transition:background-color .2s}.nav-link:hover,.nav-link.active{background-color:#ffffff26}.header-user{display:flex;align-items:center;gap:var(--spacing-sm)}.btn-logout{background:#ffffff26;color:var(--color-white);border:1px solid rgba(255,255,255,.3);padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-sm);cursor:pointer;font-size:.875rem;transition:background-color .2s}.btn-logout:hover{background:#ffffff40}.layout{min-height:100vh;display:flex;flex-direction:column}.layout-content{flex:1;padding:var(--spacing-lg);max-width:1200px;width:100%;margin:0 auto}:root{--color-primary: #2563eb;--color-primary-dark: #1d4ed8;--color-white: #ffffff;--color-bg: #f1f5f9;--color-text: #1e293b;--color-text-muted: #64748b;--color-border: #cbd5e1;--color-error: #dc2626;--color-error-bg: #fef2f2;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--radius-sm: .375rem;--radius-md: .5rem;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px rgba(0, 0, 0, .1);--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-family);color:var(--color-text);background-color:var(--color-bg);line-height:1.5;-webkit-font-smoothing:antialiased}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}.loading{display:flex;justify-content:center;align-items:center;min-height:200px;color:var(--color-text-muted)}