.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

.calculator-main {
    padding: 80px 0;
    background: var(--bg-light);
}

.calculator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.calculator-form {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-hover);
    border: 1px solid var(--border-color);
}

.calculator-form h2 {
    color: var(--secondary-color);
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    font-weight: 600;
}

.form-group {
    margin-bottom: 2.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.input-group {
    position: relative;
    margin-bottom: 0.5rem;
}

.form-group input[type="range"] {
    width: 100%;
    height: 10px;
    border-radius: 5px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
    cursor: pointer;
}

.form-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
}

.form-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.form-group input[type="range"]::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
}

.form-group input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.range-display {
    position: absolute;
    top: -40px;
    right: 0;
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: 0.5rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

.btn-primary,
.btn-secondary {
    padding: 15px 30px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    text-align: center;
    min-width: 120px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.calculator-result {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-hover);
    border: 2px solid var(--primary-color);
    position: sticky;
    top: 100px;
}

.calculator-result h2 {
    color: var(--secondary-color);
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    font-weight: 600;
}

.result-summary {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 15px;
    margin-bottom: 2rem;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border-color);
}

.summary-item:last-child {
    border-bottom: none;
}

.summary-item .label {
    color: var(--text-light);
    font-weight: 500;
}

.summary-item .value {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.1rem;
}

.result-details {
    margin-bottom: 2rem;
}

.result-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.2rem 0;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.result-item:hover {
    background: var(--bg-light);
    margin: 0 -1rem;
    padding: 1.2rem;
    border-radius: 10px;
}

.result-item.total {
    border-bottom: none;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    margin: 0 -1rem;
    padding: 1.2rem;
    border-radius: 10px;
}

.result-item.total .label,
.result-item.total .value {
    color: white;
}

.result-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.result-item.total .result-icon {
    background: rgba(255, 255, 255, 0.2);
}

.result-icon i {
    color: white;
    font-size: 1.2rem;
}

.result-content {
    flex: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.result-content .label {
    color: var(--text-light);
    font-weight: 500;
}

.result-content .value {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.2rem;
}

.result-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.result-actions .btn-primary,
.result-actions .btn-secondary {
    width: 100%;
    padding: 15px;
    font-size: 1.1rem;
}

.calculation-info {
    padding: 80px 0;
    background: var(--bg-color);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.info-card {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.info-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.info-icon i {
    color: white;
    font-size: 1.5rem;
}

.info-card:nth-child(3) .info-icon {
    background: var(--primary-color);
}

.info-card:nth-child(3) .info-icon i {
    color: var(--primary-color);
    font-size: 0.8rem;
}

.info-card h3 {
    color: var(--secondary-color);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.info-card ul {
    list-style: none;
    padding: 0;
}

.info-card ul li {
    padding: 0.5rem 0;
    color: var(--text-light);
    line-height: 1.6;
    position: relative;
    padding-left: 1.5rem;
}

.info-card ul li::before {
    content: '•';
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: 0;
}

.info-card p {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 1rem;
}

@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2.5rem;
    }

    .page-header p {
        font-size: 1rem;
    }

    .calculator-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .calculator-form,
    .calculator-result {
        padding: 2rem;
    }

    .calculator-result {
        position: static;
    }

    .form-actions {
        flex-direction: column;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
    }

    .result-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .page-header {
        padding: 100px 0 60px;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .calculator-form,
    .calculator-result {
        padding: 1.5rem;
    }

    .info-card {
        padding: 2rem;
    }

    .range-display {
        position: static;
        display: inline-block;
        margin-top: 0.5rem;
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

.calculator-form,
.calculator-result {
    animation: slideInUp 0.6s ease-out;
}

.result-item {
    animation: slideInUp 0.4s ease-out;
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-color);
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}