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

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

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

.academic-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);
}

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

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

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

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

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

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

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

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

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

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

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

/* --- tool: power-calculation-calculator --- */
/* 功率计算器样式 */
.power-calculator-tool {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.conversion-card {
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.conversion-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
}

.card-header {
    border-radius: 12px 12px 0 0 !important;
    border: none;
}

.input-group-custom {
    border-radius: 8px;
    overflow: hidden;
}

.input-group-custom .form-control {
    border-right: none;
    border-radius: 8px 0 0 8px;
}

.input-group-custom .input-group-text {
    border-left: none;
    background-color: #f8f9fa;
    border-radius: 0 8px 8px 0;
    font-weight: 600;
}

.btn-convert {
    border-radius: 8px;
    padding: 12px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-convert:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.result-display {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 12px;
    padding: 20px;
    margin-top: 20px;
    border: 2px solid #dee2e6;
}

.unit-display {
    font-size: 0.9rem;
    color: #6c757d;
    font-weight: 500;
    margin-bottom: 5px;
}

.preset-button {
    border-radius: 20px;
    padding: 8px 16px;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.preset-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.info-badge {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    padding: 10px 15px;
    border-radius: 8px;
    border-left: 4px solid #2196f3;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .power-calculator-tool {
        padding: 10px;
    }
    
    .conversion-card {
        margin-bottom: 20px;
    }
    
    .preset-button {
        font-size: 0.8rem;
        padding: 6px 12px;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-display {
    animation: fadeInUp 0.5s ease-out;
}

/* 历史记录样式 */
.history-item {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 8px;
    border-left: 4px solid #007bff;
    transition: all 0.3s ease;
}

.history-item:hover {
    background: #e9ecef;
    transform: translateX(5px);
}

.history-item .history-time {
    font-size: 0.8rem;
    color: #6c757d;
}

.history-item .history-calculation {
    font-weight: 600;
    color: #495057;
}