.bst-box {
    max-width: 600px;
    margin: 20px auto;
    padding: 30px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.1);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.bst-box h3 {
    margin: 0 0 10px 0;
    color: #1f2937;
    font-size: 22px;
}

.bst-intro {
    margin: 0 0 25px 0;
    color: #6b7280;
    font-size: 14px;
}

.bst-field {
    margin-bottom: 18px;
}

.bst-field label {
    display: block;
    margin: 0 0 6px 0;
    font-weight: 600;
    color: #374151;
    font-size: 14px;
}

.bst-field input,
.bst-field select {
    width: 100%;
    padding: 12px 14px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 16px;
    box-sizing: border-box;
}

.bst-field input:focus,
.bst-field select:focus {
    outline: none;
    border-color: #3b82f6;
}
.bst-desc {
    margin: 8px 0 0 0;
    font-size: 13px;
    color: #6b7280;
    font-style: italic;
    line-height: 1.5;
}

#bst-btn {
    width: 100%;
    padding: 14px;
    background: #3b82f6;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 10px;
}

#bst-btn:hover {
    background: #2563eb;
}

#bst-btn:disabled {
    background: #9ca3af;
    cursor: not-allowed;
}

#bst-load {
    text-align: center;
    padding: 20px;
    color: #6b7280;
}

#bst-res {
    margin-top: 25px;
    padding: 25px;
    background: #f0f9ff;
    border-radius: 10px;
    border-left: 4px solid #3b82f6;
}

#bst-res h4 {
    margin: 0 0 10px 0;
    color: #1f2937;
    font-size: 18px;
}
.bst-full-desc {
    margin: 0 0 20px 0;
    color: #374151;
    font-size: 14px;
    line-height: 1.6;
}

.bst-changes {
    background: #ffffff;
    padding: 15px;
    border-radius: 8px;
    margin: 0 0 20px 0;
}

.bst-change-item {
    padding: 6px 0;
    font-size: 14px;
    color: #374151;
    border-bottom: 1px solid #e5e7eb;
}

.bst-change-item:last-child {
    border-bottom: none;
}

.bst-bar {
    height: 12px;
    background: #e5e7eb;
    border-radius: 6px;
    margin: 15px 0;
    overflow: hidden;
}

#bst-fill {
    height: 100%;
    width: 100%;
    background: #22c55e;
    transition: width 0.5s;
}

#bst-safety {
    font-size: 14px;
    color: #374151;
    margin: 0 0 20px 0;
    font-weight: 500;
}

.bst-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));    gap: 12px;
}

.bst-stat {
    padding: 12px;
    background: #ffffff;
    border-radius: 8px;
    text-align: center;
    border: 1px solid #e0e7ff;
}

.bst-stat.bst-flow {
    grid-column: 1 / -1;
    background: #dbeafe;
    border-color: #3b82f6;
}

.bst-stat-label {
    display: block;
    font-size: 12px;
    color: #6b7280;
    margin-bottom: 6px;
}

.bst-stat-value {
    display: block;
    font-size: 16px;
    font-weight: 700;
    color: #1f2937;
}

#bst-err {
    margin-top: 20px;
    padding: 15px;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 8px;
    color: #dc2626;
    text-align: center;
}

@media (max-width: 600px) {
    .bst-box {
        padding: 20px;
    }
    
    .bst-grid {
        grid-template-columns: 1fr 1fr;
    }
        .bst-stat.bst-flow {
        grid-column: 1 / -1;
    }
}