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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.navbar {
    background-color: #2c3e50;
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 0.4rem 0.6rem;
    border-radius: 4px;
    transition: background-color 0.2s;
    white-space: nowrap;
}

.nav-link:hover {
    background-color: #34495e;
}

.nav-user {
    color: #bdc3c7;
    font-size: 0.9rem;
}

.nav-btn {
    background-color: #e74c3c;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.nav-btn:hover {
    background-color: #c0392b;
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.auth-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.auth-container {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

.auth-container h1 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #2c3e50;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #555;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
}

.btn-primary {
    width: 100%;
    padding: 0.75rem;
    background-color: #667eea;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-primary:hover {
    background-color: #5568d3;
}

.btn-secondary {
    padding: 0.5rem 1rem;
    background-color: #95a5a6;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-secondary:hover {
    background-color: #7f8c8d;
}

.btn-danger {
    padding: 0.5rem 1rem;
    background-color: #e74c3c;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-danger:hover {
    background-color: #c0392b;
}

.btn-success {
    padding: 0.5rem 1rem;
    background-color: #27ae60;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-success:hover {
    background-color: #229954;
}

.error-message {
    color: #e74c3c;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.auth-link {
    text-align: center;
    margin-top: 1rem;
    color: #666;
}

.auth-link a {
    color: #667eea;
    text-decoration: none;
}

.auth-link a:hover {
    text-decoration: underline;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.modal-header h2 {
    color: #2c3e50;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #666;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

@media (max-width: 640px) {
    .navbar {
        padding: 0.5rem 0.75rem;
        flex-wrap: wrap;
        gap: 0.25rem;
    }

    .nav-brand {
        font-size: 1.15rem;
    }

    .container {
        margin: 0.75rem auto;
    }

    .modal-content {
        margin: 0.5rem;
        padding: 1rem;
    }

    .modal-actions {
        flex-direction: column;
        gap: 0.5rem;
    }

    .modal-actions .btn-primary,
    .modal-actions .btn-secondary,
    .modal-actions .btn-danger {
        width: 100%;
        text-align: center;
    }
}