:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --background-color: #f8f9fa;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.card {
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    margin-bottom: 20px;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.ideas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    padding: 20px 0;
}

.idea-card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    animation: fadeIn 0.5s ease-out;
    border-left: 4px solid #007bff;
}

.idea-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.idea-card h6 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.category-tag {
    display: inline-block;
    padding: 5px 12px;
    background-color: #e9ecef;
    color: #495057;
    border-radius: 15px;
    font-size: 0.85rem;
    margin-bottom: 10px;
    transition: background-color 0.3s ease;
}

.expertise-note {
    color: #6c757d;
    font-size: 0.9rem;
    margin: 10px 0;
    line-height: 1.4;
}

.simulation-container {
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 10px;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Session history styles */
.history-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.history-item {
    padding: 15px;
    margin-bottom: 10px;
    background: white;
    border-radius: 8px;
    border-left: 4px solid #28a745;
    cursor: pointer;
    transition: all 0.3s ease;
}

.history-item:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.history-item h6 {
    margin: 0 0 5px 0;
    color: #2c3e50;
}

.history-item p {
    margin: 0;
    color: #6c757d;
    font-size: 0.9rem;
}

.history-date {
    font-size: 0.8rem;
    color: #adb5bd;
}

/* Toast notification */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

.toast {
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* btn-primary */
.btn-primary {
    position: relative;
    overflow: hidden;
    background-color: var(--secondary-color);
    border: none;
    padding: 10px 20px;
    transition: all 0.3s ease;
}

.btn-primary:disabled {
    cursor: not-allowed;
    opacity: 0.7;
}

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
}

#spinnerContainer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: rgba(0, 123, 255, 0.8);
    z-index: 10;
}

.spinner-border {
    color: white !important;
}

/* form-control */
.form-control:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}