.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: doppler-radar-calculator --- */
.doppler-radar-calculator {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: auto;
    padding: 2rem 0;
}

.calculation-card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
}

.calculation-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.card-header {
    border-radius: 15px 15px 0 0 !important;
    border: none;
    padding: 1.5rem;
}

.input-group-custom {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.input-group-custom .form-control {
    border: none;
    padding: 0.75rem 1rem;
    background: rgba(255,255,255,0.9);
}

.input-group-custom .input-group-text {
    border: none;
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    font-weight: bold;
    padding: 0.75rem 1rem;
}

.btn-calculate {
    border-radius: 10px;
    padding: 0.75rem 1.5rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    border: none;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.btn-calculate:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.result-display {
    background: linear-gradient(135deg, rgba(255,255,255,0.9), rgba(255,255,255,0.7));
    border-radius: 10px;
    padding: 1.5rem;
    margin-top: 1rem;
    border: 2px solid rgba(102, 126, 234, 0.3);
}

.formula-display {
    background: rgba(102, 126, 234, 0.1);
    padding: 0.75rem;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-weight: bold;
    text-align: center;
    margin-bottom: 1rem;
    border-left: 4px solid #667eea;
}

.preset-button {
    border-radius: 20px;
    margin: 0.25rem;
    transition: all 0.3s ease;
}

.preset-button:hover {
    transform: scale(1.05);
}

.unit-converter {
    background: rgba(255,255,255,0.9);
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.history-item {
    background: rgba(255,255,255,0.8);
    border-radius: 10px;
    padding: 1rem;
    margin-bottom: 0.5rem;
    border-left: 4px solid #667eea;
    transition: all 0.3s ease;
}

.history-item:hover {
    background: rgba(255,255,255,0.95);
    transform: translateX(5px);
}

.radar-icon {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.frequency-display {
    font-size: 1.2rem;
    font-weight: bold;
    color: #667eea;
}

.speed-display {
    font-size: 1.2rem;
    font-weight: bold;
    color: #764ba2;
}

.distance-display {
    font-size: 1.2rem;
    font-weight: bold;
    color: #28a745;
}

.angle-display {
    font-size: 1.2rem;
    font-weight: bold;
    color: #dc3545;
}