.tool-fullwidth {
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 0;
}

/* Tool shell */
.engineering-tool {
    max-width: 100%;
    margin: 0 auto;
}

.engineering-tool.editor-section,
.editor-section.engineering-tool {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.engineering-tool .card:not(.result-card) {
    border: 1px solid var(--color-border, #e5e7eb);
    box-shadow: var(--shadow-sm, 0 1px 3px rgba(0, 0, 0, 0.06));
    border-radius: var(--radius, 12px);
    background: var(--color-surface, #fff);
}

.engineering-tool .card-body {
    padding: 1.25rem 1.35rem;
}

.engineering-tool .card-title {
    color: var(--color-text, #1f2937);
    font-weight: 700;
    font-size: 1.05rem;
}

.engineering-tool .form-control,
.engineering-tool .form-select,
.engineering-tool .select-input,
.engineering-tool textarea {
    border-radius: 8px;
    border: 1px solid var(--color-border, #e5e7eb);
}

.engineering-tool .form-control:focus,
.engineering-tool .form-select:focus,
.engineering-tool textarea:focus {
    border-color: var(--color-primary, #0d9488);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

.engineering-tool .btn-primary {
    background: var(--color-primary, #0d9488);
    border-color: var(--color-primary, #0d9488);
}

.engineering-tool .btn-primary:hover {
    background: var(--color-primary-hover, #0f766e);
    border-color: var(--color-primary-hover, #0f766e);
}

.engineering-tool .alert {
    border-radius: 10px;
}

[data-theme="dark"] .engineering-tool .card:not(.result-card) {
    background: var(--color-surface, #1f2937);
    border-color: var(--color-border, #374151);
}

[data-theme="dark"] .engineering-tool .card-title,
[data-theme="dark"] .engineering-tool .form-label,
[data-theme="dark"] .engineering-tool {
    color: var(--color-text, #f9fafb);
}

[data-theme="dark"] .engineering-tool .text-muted,
[data-theme="dark"] .engineering-tool .form-text {
    color: var(--color-text-secondary, #9ca3af) !important;
}

[data-theme="dark"] .engineering-tool .form-control,
[data-theme="dark"] .engineering-tool .form-select,
[data-theme="dark"] .engineering-tool textarea {
    background: #111827;
    color: var(--color-text, #f9fafb);
    border-color: var(--color-border, #374151);
}

/* --- tool: charging-time-calculator --- */
.tool-charging-calculator-full {
    max-width: 1200px;
    margin: 0 auto;
}

.result-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: #fff !important;
    border: none !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.engineering-tool .result-card .card-title,
.engineering-tool .result-card h4,
.engineering-tool .result-card h5,
.engineering-tool .result-card h6,
.engineering-tool .result-card .result-label,
.engineering-tool .result-card .result-value,
.engineering-tool .result-card i {
    color: #fff !important;
}

.result-item {
    padding: 15px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.12);
    margin: 5px;
}

.result-label {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-bottom: 5px;
}

.result-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: #fff;
}

.charging-stages {
    margin-top: 15px;
}

.stage-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid #eee;
}

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

.progress-bar {
    height: 8px;
    border-radius: 4px;
    background: #e9ecef;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #28a745, #20c997);
    transition: width 0.3s ease;
}

.comparison-row {
    transition: background-color 0.2s ease;
}

.comparison-row:hover {
    background-color: #f8f9fa;
}

.time-badge {
    font-size: 0.85rem;
    padding: 4px 8px;
    border-radius: 12px;
    font-weight: 500;
}

.speed-badge {
    font-size: 0.8rem;
    padding: 3px 6px;
    border-radius: 10px;
    background: #e3f2fd;
    color: #1976d2;
}

@media (max-width: 768px) {
    .result-item {
        margin: 3px;
        padding: 10px;
    }
    
    .result-value {
        font-size: 1.2rem;
    }
}