/* Widget Container */
.wavelength-widget-container {
    max-width: 900px;
    margin: 0 auto;
}

/* Calculator Form */
.calculator-form {
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    margin-bottom: 2rem;
}

/* Input Groups */
.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

.input-with-unit {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
}

.input-field {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.2s;
    background: #f8fafc;
}

.input-field:focus {
    outline: none;
    border-color: var(--primary);
    background: #fff;
}

.unit-select {
    padding: 0.8rem;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    background: #f8fafc;
    font-size: 1rem;
    min-width: 100px;
    cursor: pointer;
}

.unit-select:focus {
    outline: none;
    border-color: var(--primary);
}

/* Preset Buttons */
.preset-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    margin-top: 10px;
}

.preset-btn {
    padding: 8px 12px;
    border: 1px solid #cbd5e1;
    background: #f1f5f9;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    color: #475569;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.preset-btn:hover {
    background: #e2e8f0;
}

.preset-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Action Button */
.calc-action-btn {
    width: 100%;
    padding: 1.2rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
}

.calc-action-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

/* Results Section */
.result-container {
    margin-top: 2rem;
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

@media (max-width: 600px) {
    .result-grid {
        grid-template-columns: 1fr;
    }
}

.result-card {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.result-card.frequency {
    border-top: 5px solid #8b5cf6;
}

.result-card.wavelength {
    border-top: 5px solid #10b981;
}

.result-card.period {
    border-top: 5px solid #f59e0b;
}

.result-card.speed {
    border-top: 5px solid var(--primary);
}

.result-card h4 {
    color: #64748b;
    font-size: 0.85rem;
    text-transform: uppercase;
    margin-bottom: 10px;
    letter-spacing: 0.5px;
}

.result-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Formula Box */
.formula-box {
    background: #ecfdf5;
    border: 1px solid #d1fae5;
    border-radius: 12px;
    padding: 20px;
    margin: 20px 0;
}

.formula-box h4 {
    color: #059669;
    margin-bottom: 10px;
}

.formula {
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    font-weight: 700;
    color: #059669;
    background: white;
    padding: 5px 12px;
    border-radius: 6px;
    border: 1px solid #d1fae5;
    display: inline-block;
    margin: 5px 0;
}