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

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

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

.calc-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);
}

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

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

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

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

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

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

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

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

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

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

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

/* --- tool: breathing-rate-calculator --- */
/* 呼吸次数计算器专用样式 */
.breathing-calculator {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.breathing-calculator .card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.breathing-calculator .form-control {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

.breathing-calculator .form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.breathing-calculator .btn-calculate {
    background: linear-gradient(45deg, #667eea, #764ba2);
    border: none;
    border-radius: 10px;
    padding: 12px 30px;
    font-weight: 600;
    color: white;
    transition: all 0.3s ease;
}

.breathing-calculator .btn-calculate:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.breathing-calculator .btn-reset {
    background: #6c757d;
    border: none;
    border-radius: 10px;
    padding: 12px 30px;
    font-weight: 600;
    color: white;
    transition: all 0.3s ease;
}

.breathing-calculator .btn-reset:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

.breathing-calculator .btn-start {
    background: linear-gradient(45deg, #28a745, #20c997);
    border: none;
    border-radius: 10px;
    padding: 15px 40px;
    font-weight: 600;
    color: white;
    transition: all 0.3s ease;
    font-size: 1.1rem;
}

.breathing-calculator .btn-start:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(40, 167, 69, 0.4);
}

.breathing-calculator .btn-stop {
    background: linear-gradient(45deg, #dc3545, #fd7e14);
    border: none;
    border-radius: 10px;
    padding: 15px 40px;
    font-weight: 600;
    color: white;
    transition: all 0.3s ease;
    font-size: 1.1rem;
}

.breathing-calculator .btn-stop:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(220, 53, 69, 0.4);
}

.breathing-result {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    margin-top: 2rem;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    text-align: center;
}

.breathing-value {
    font-size: 3rem;
    font-weight: bold;
    margin: 1rem 0;
    color: #667eea;
}

.breathing-category {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 1rem 0;
    padding: 0.5rem 1rem;
    border-radius: 10px;
    display: inline-block;
}

.breathing-category.normal {
    background: #d4edda;
    color: #155724;
}

.breathing-category.slightly-high {
    background: #fff3cd;
    color: #856404;
}

.breathing-category.high {
    background: #f8d7da;
    color: #721c24;
}

.breathing-category.low {
    background: #cce5ff;
    color: #004085;
}

.breathing-description {
    color: #6c757d;
    font-size: 1.1rem;
    line-height: 1.6;
}

.breathing-chart {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    margin-top: 2rem;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.breathing-range {
    padding: 1rem;
    margin: 0.5rem 0;
    border-radius: 10px;
    border-left: 5px solid;
    transition: all 0.3s ease;
}

.breathing-range:hover {
    transform: translateX(5px);
}

.breathing-range.normal {
    background: #d4edda;
    border-left-color: #28a745;
}

.breathing-range.slightly-high {
    background: #fff3cd;
    border-left-color: #ffc107;
}

.breathing-range.high {
    background: #f8d7da;
    border-left-color: #dc3545;
}

.breathing-range.low {
    background: #cce5ff;
    border-left-color: #007bff;
}

.breathing-range.current {
    border: 2px solid #667eea;
    font-weight: bold;
    transform: translateX(5px);
}

.timer-display {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    margin: 1rem 0;
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.3);
}

.timer-display .timer-text {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.timer-display .timer-count {
    font-size: 4rem;
    font-weight: bold;
    margin: 1rem 0;
}

.timer-display .breath-count {
    font-size: 1.5rem;
    margin-top: 1rem;
}

.age-group {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 1rem;
    margin: 1rem 0;
}

.age-group h6 {
    color: #495057;
    margin-bottom: 1rem;
}

.age-group .form-check {
    margin: 0.5rem 0;
}

.age-group .form-check-input:checked {
    background-color: #667eea;
    border-color: #667eea;
}

.age-group .form-check-label {
    font-weight: 500;
    color: #495057;
}

.breathing-instructions {
    background: #e3f2fd;
    border-radius: 10px;
    padding: 1.5rem;
    margin: 1rem 0;
    border-left: 5px solid #2196f3;
}

.breathing-instructions h6 {
    color: #1976d2;
    margin-bottom: 1rem;
}

.breathing-instructions ul {
    margin: 0;
    padding-left: 1.5rem;
}

.breathing-instructions li {
    margin: 0.5rem 0;
    color: #1976d2;
}

@media (max-width: 768px) {
    .breathing-calculator {
        padding: 1rem;
        margin: 1rem 0;
    }
    
    .breathing-value {
        font-size: 2rem;
    }
    
    .breathing-category {
        font-size: 1.2rem;
    }
    
    .timer-display .timer-count {
        font-size: 3rem;
    }
}