:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
}

/* Navigation */
.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: #fff !important;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    color: white;
    padding: 60px 20px;
    border-radius: 10px;
    margin-bottom: 40px;
}

.hero-section h1 {
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.hero-section .lead {
    font-size: 1.3rem;
    color: rgba(255,255,255,0.9);
}

/* Cards */
.card {
    border: none;
    border-radius: 10px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15) !important;
}

.card-header {
    border-radius: 10px 10px 0 0;
    padding: 20px;
    font-weight: 600;
}

.card-header h2 {
    font-size: 1.5rem;
}

.card-body {
    padding: 25px;
}

/* Forms */
.form-control, .form-select {
    border-radius: 5px;
    border: 1px solid #ddd;
    padding: 10px 15px;
    font-size: 0.95rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0,123,255,0.25);
}

.form-label {
    font-weight: 600;
    margin-bottom: 8px;
    color: #333;
}

/* Buttons */
.btn {
    border-radius: 5px;
    font-weight: 600;
    padding: 10px 20px;
    transition: all 0.3s;
}

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

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,123,255,0.3);
}

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

.btn-success:hover {
    background-color: #218838;
    border-color: #218838;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(40,167,69,0.3);
}

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

.btn-info:hover {
    background-color: #138496;
    border-color: #138496;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(23,162,184,0.3);
}

/* Alerts */
.alert {
    border: none;
    border-radius: 8px;
    border-left: 5px solid;
}

.alert-success {
    border-left-color: var(--success-color);
    background-color: #f0f9f7;
}

.alert-info {
    border-left-color: var(--info-color);
    background-color: #f0f7fa;
}

.alert-danger {
    border-left-color: var(--danger-color);
    background-color: #faf0f0;
}

.alert-warning {
    border-left-color: var(--warning-color);
    background-color: #fffaf0;
}

/* Tables */
.table {
    border-collapse: collapse;
}

.table thead {
    background-color: #f8f9fa;
}

.table thead th {
    border-bottom: 2px solid #dee2e6;
    font-weight: 600;
    color: #333;
}

.table tbody tr {
    transition: background-color 0.2s;
}

.table tbody tr:hover {
    background-color: #f8f9fa;
}

.table td {
    padding: 12px;
    border-bottom: 1px solid #dee2e6;
}

/* Loading Spinner */
.spinner-border {
    color: var(--primary-color);
}

/* Recipe List */
#recipesList .card {
    cursor: pointer;
}

#recipesList .card-body {
    padding: 15px;
}

#recipesList .card-title {
    color: var(--primary-color);
    font-weight: 600;
}

/* Footer */
footer {
    margin-top: 80px;
    border-top: 1px solid #dee2e6;
}

footer p {
    margin-bottom: 5px;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-section {
        padding: 40px 15px;
    }

    .hero-section h1 {
        font-size: 2rem;
    }

    .hero-section .lead {
        font-size: 1rem;
    }

    .btn-lg {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    .card-header h2 {
        font-size: 1.2rem;
    }

    .table {
        font-size: 0.85rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.5s ease-in-out;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #0056b3;
}