:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --dark-color: #212529;
    --light-bg: #f8f9fa;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    min-height: 100vh;
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.25rem;
}

.card {
    border: none;
    border-radius: 0.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1) !important;
}

.listing-image {
    height: 200px;
    object-fit: cover;
    border-radius: 0.5rem 0.5rem 0 0;
}

.card-title {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.75rem;
}

.card-text {
    font-size: 0.95rem;
    line-height: 1.6;
}

.btn {
    border-radius: 0.375rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: #0b5ed7;
    border-color: #0a58ca;
    transform: translateY(-1px);
}

.btn-outline-primary:hover {
    transform: translateY(-1px);
}

.btn-outline-danger:hover {
    transform: translateY(-1px);
}

.nav-tabs {
    border-bottom: 2px solid #dee2e6;
}

.nav-tabs .nav-link {
    border: none;
    color: var(--secondary-color);
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    transition: all 0.2s;
}

.nav-tabs .nav-link:hover {
    border-color: transparent;
    color: var(--primary-color);
}

.nav-tabs .nav-link.active {
    color: var(--primary-color);
    border-bottom: 3px solid var(--primary-color);
    background-color: transparent;
}

.alert {
    border-radius: 0.5rem;
    border: none;
}

.form-control,
.form-select {
    border-radius: 0.375rem;
    border: 1px solid #ced4da;
    padding: 0.625rem 0.875rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
}

textarea.form-control {
    resize: vertical;
}

.btn-group .btn-check:checked + .btn-outline-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.min-vh-100 {
    min-height: 100vh;
}

.shadow-sm {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important;
}

.text-muted {
    color: #6c757d !important;
}

small.text-muted {
    font-size: 0.875rem;
}

.bi {
    vertical-align: middle;
}

.navbar-text .bi {
    font-size: 1.25rem;
}

.card-footer {
    padding: 0.75rem 1rem;
}

.img-thumbnail {
    border-radius: 0.375rem;
    padding: 0.25rem;
}

@media (max-width: 768px) {
    .nav-tabs .nav-link {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .card-body {
        padding: 1rem !important;
    }

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }
}

.alert-link {
    font-weight: 600;
    text-decoration: underline;
}

.alert-link:hover {
    text-decoration: none;
}

.badge {
    padding: 0.35em 0.65em;
    font-weight: 500;
}

input[type="file"]::file-selector-button {
    padding: 0.375rem 0.75rem;
    margin-right: 0.75rem;
    border-radius: 0.25rem;
    border: 1px solid #ced4da;
    background-color: #f8f9fa;
    cursor: pointer;
    transition: all 0.2s;
}

input[type="file"]::file-selector-button:hover {
    background-color: #e9ecef;
}