/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f9fafb;
    color: #1f2937;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
header {
    background: white;
    padding: 1rem 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

header h1 {
    font-size: 1.5rem;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.user-info span {
    font-weight: 500;
}

.btn-logout {
    padding: 0.375rem 0.75rem;
    background: #ef4444;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.875rem;
}

.btn-logout:hover {
    background: #dc2626;
}

/* Navigation */
nav {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

nav a {
    padding: 0.5rem 1rem;
    color: #6b7280;
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

nav a:hover {
    color: #1f2937;
}

nav a.active {
    color: #3b82f6;
    border-bottom-color: #3b82f6;
}

/* Main Content */
main {
    min-height: 60vh;
}

/* Messages */
.message {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.message.success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #6ee7b7;
}

.message.error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    color: #6b7280;
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.25rem;
    }

    nav {
        flex-direction: column;
    }

    nav a {
        padding: 0.75rem 0;
    }
}