.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 {
    border-radius: 8px;
    border: 1px solid var(--color-border, #e5e7eb);
}

.engineering-tool .form-control:focus,
.engineering-tool .form-select: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 {
    background: #111827;
    color: var(--color-text, #f9fafb);
    border-color: var(--color-border, #374151);
}

/* --- tool: slope-calculator --- */
.slope-calculator {
    padding: 2rem 0;
}

.unit-toggle {
    margin-bottom: 2rem;
}

.btn-calculate {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-calculate:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
    color: white;
}

.btn-reset {
    background: #6c757d;
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
}

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

.slope-result {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    padding: 2rem;
    border-radius: 15px;
    margin: 2rem 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.slope-value {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.slope-percentage, .slope-angle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.slope-category {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.slope-description, .slope-recommendation {
    font-size: 0.95rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.slope-chart {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 10px;
    margin: 2rem 0;
}

.slope-range {
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    border-radius: 8px;
    border-left: 4px solid;
}

.slope-range.safe {
    background: #d4edda;
    border-left-color: #28a745;
    color: #155724;
}

.slope-range.moderate {
    background: #fff3cd;
    border-left-color: #ffc107;
    color: #856404;
}

.slope-range.steep {
    background: #f8d7da;
    border-left-color: #dc3545;
    color: #721c24;
}

.slope-range.dangerous {
    background: #f5c6cb;
    border-left-color: #dc3545;
    color: #721c24;
    font-weight: bold;
}

.slope-info .alert {
    border-radius: 10px;
    border: none;
}

.slope-info .alert-info {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    color: #0c5460;
}

.slope-info .alert-warning {
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    color: #856404;
}

@media (max-width: 768px) {
    .slope-value {
        font-size: 2.5rem;
    }
    
    .slope-result {
        padding: 1.5rem;
    }
}