@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.solver-controls {
    margin-bottom: 1rem;
    padding: 1rem;
    background: #f5f5f5;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.3s ease-out;
}

.solver-select {
    padding: 0.5rem 0.75rem;
    border: 1px solid #ddd;
    border-radius: 6px;
    background: white;
    font-size: 0.9rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.solver-select:hover {
    border-color: #bbb;
}

.solver-select:focus {
    border-color: #1976d2;
    box-shadow: 0 0 0 2px rgba(25, 118, 210, 0.1);
    outline: none;
}


.solver-description-container {
    margin-bottom: 1.25rem;
    padding: 1.25rem;
    background: #f8f9fa;
    border-radius: 6px;
    transition: background-color 0.2s, opacity 0.15s ease-in-out;
    opacity: 1;
}

.solver-description-container:hover {
    background: #f3f4f6;
}

.solver-description-container.updating {
    opacity: 0;
}

.solver-description {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 1.25rem;
    transition: color 0.2s;
}

.solver-description-container:hover .solver-description {
    color: #444;
}

.cost-structure {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid #eee;
    transition: border-color 0.2s;
}

.solver-description-container:hover .cost-structure {
    border-color: #ddd;
}

.cost-structure h4 {
    margin: 0 0 0.5rem 0;
    color: #333;
    font-size: 0.9rem;
}

@keyframes fadeInCost {
    from {
        opacity: 0;
        transform: translateY(3px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.cost-list {
    font-family: monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    margin: 0;
    padding: 0.75rem;
    background: #fff;
    border-radius: 4px;
    border: 1px solid #eee;
    white-space: pre-wrap;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.5rem;
    animation: fadeInCost 0.3s ease-out;
}

.cost-list span {
    display: inline-block;
    font-weight: 600;
    padding: 0.15rem 0.35rem;
    border-radius: 3px;
    background: rgba(0, 0, 0, 0.03);
    transition: transform 0.2s, background-color 0.2s;
}

.cost-list span:hover {
    transform: translateX(2px);
    background: rgba(0, 0, 0, 0.05);
}

.solver-metrics {
    background: white;
    padding: 1.25rem;
    border-radius: 6px;
    border: 1px solid #eee;
    margin-top: 1.25rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.solver-metrics:hover {
    transform: translateY(-1px);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.05);
}

.solver-metrics h4 {
    margin: 0 0 0.5rem 0;
    color: #333;
    font-size: 0.9rem;
}

.solver-metrics ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.75rem;
}

.solver-metrics li {
    font-size: 0.85rem;
    color: #666;
    display: flex;
    flex-direction: column;
    padding: 0.75rem;
    background: #f8f9fa;
    border: 1px solid #eee;
    border-radius: 6px;
    position: relative;
    overflow: hidden;
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1),
        box-shadow 0.2s cubic-bezier(0.4, 0, 0.2, 1),
        background-color 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform, box-shadow;
}

.solver-metrics li:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
    background-color: #fff;
}

.solver-metrics li::before,
.solver-metrics li::after {
    content: '';
    position: absolute;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.solver-metrics li::before {
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(to right, transparent, currentColor, transparent);
}

.solver-metrics li::after {
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(to right, transparent, currentColor, transparent);
}

.solver-metrics li:hover::before,
.solver-metrics li:hover::after {
    opacity: 0.1;
}

@keyframes countUp {
    from {
        transform: translateY(10px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }

    100% {
        transform: scale(1);
    }
}

.solver-metrics li span {
    font-size: 1.25rem;
    font-weight: bold;
    color: #333;
    margin-top: 0.5rem;
    transition: transform 0.2s, color 0.2s;
    animation: countUp 0.5s ease-out;
    transform-origin: left center;
}

.solver-metrics li:hover span {
    transform: scale(1.05);
}

.solver-metrics li span.updating {
    animation: pulse 0.5s ease-in-out;
}

.solver-metrics li:nth-child(1) span {
    color: #1976d2;
}

/* Days */
.solver-metrics li:nth-child(2) span {
    color: #ffa000;
}

/* Morning */
.solver-metrics li:nth-child(3) span {
    color: #388e3c;
}

/* Afternoon */
.solver-metrics li:nth-child(4) span {
    color: #7b1fa2;
}

/* Evening */
.solver-metrics li:nth-child(5) span {
    color: #d32f2f;
}

/* Cost */
.solver-metrics li:nth-child(6) span {
    color: #455a64;
}

/* Time */

.transitions-section {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #eee;
}

.transitions-list {
    list-style: none;
    margin: 0.5rem 0 0 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.transitions-list li {
    font-size: 0.85rem;
    color: #666;
    padding: 0.5rem 1rem;
    background: #f8f9fa;
    border: 1px solid #eee;
    border-radius: 16px;
    display: inline-flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform, box-shadow;
}

.transitions-list li:hover {
    background: #fff;
    border-color: #ddd;
    transform: translateY(-1px) scale(1.02);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.08);
}

.transitions-list li::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, currentColor, transparent 70%);
    opacity: 0;
    transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    mix-blend-mode: overlay;
}

.transitions-list li:hover::after {
    opacity: 0.05;
}

.transitions-list li:active {
    transform: translateY(0) scale(0.98);
    transition: transform 0.1s cubic-bezier(0.4, 0, 0.2, 1);
}

.transitions-list li::before {
    content: '→';
    margin: 0 0.35rem;
    color: #999;
    display: inline-block;
    transform: translateY(-1px);
    transition: transform 0.2s, color 0.2s;
}

@keyframes slideIn {
    from {
        transform: translateX(-10px);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.transitions-list li {
    animation: slideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation-fill-mode: both;
    will-change: transform, opacity;
    backface-visibility: hidden;
    perspective: 1000px;
}

.transitions-list li:nth-child(2) {
    animation-delay: 50ms;
}

.transitions-list li:nth-child(3) {
    animation-delay: 100ms;
}

.transitions-list li:nth-child(4) {
    animation-delay: 150ms;
}

.transitions-list li:nth-child(5) {
    animation-delay: 200ms;
}

.transitions-list li:nth-child(6) {
    animation-delay: 250ms;
}

.transitions-list li:hover::before {
    transform: translateX(3px) translateY(-1px);
    color: #666;
}

.transitions-list.updating li {
    animation: slideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}


/* Responsive adjustments */
@media (max-width: 768px) {
    .solver-controls {
        padding: 1rem;
    }

    .solver-info {
        padding: 0.75rem;
    }

    .solver-description-container {
        padding: 1rem;
    }

    .solver-metrics {
        padding: 1rem;
    }

    .solver-metrics ul {
        grid-template-columns: 1fr;
    }

    .cost-list {
        grid-template-columns: 1fr;
    }

    .transitions-list {
        gap: 0.35rem;
    }

    .transitions-list li {
        font-size: 0.8rem;
        padding: 0.35rem 0.75rem;
    }
}