:root {
    --voip-calc-primary: #0d9488;
    --voip-calc-primary-dark: #0f766e;
    --voip-calc-primary-light: #ccfbf1;
    --voip-calc-secondary: #f8fafc;
    --voip-calc-border: #e2e8f0;
    --voip-calc-text: #1e293b;
    --voip-calc-text-light: #64748b;
    --voip-calc-success: #22c55e;
    --voip-calc-warning: #f59e0b;
    --voip-calc-danger: #ef4444;
    --voip-calc-info: #3b82f6;
    --voip-calc-radius: 16px;
    --voip-calc-radius-sm: 8px;
    --voip-calc-shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --voip-calc-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --voip-calc-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.voip-calculator-container {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    color: var(--voip-calc-text);
    line-height: 1.6;
    max-width: 1400px;
    margin: 40px auto;
    padding: 0 20px;
}

.voip-calc-header {
    background: #fff;
    border: 1px solid var(--voip-calc-border);
    border-radius: var(--voip-calc-radius);
    box-shadow: var(--voip-calc-shadow);
    padding: 16px 24px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.voip-calc-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.voip-calc-logo-icon {
    width: 40px;
    height: 40px;
    background: var(--voip-calc-primary);
    border-radius: var(--voip-calc-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 20px;
}

.voip-calc-logo-text h1 {
    margin: 0;
    font-size: 16px;
    font-weight: 700;
    color: var(--voip-calc-text);
}

.voip-calc-logo-text p {
    margin: 0;
    font-size: 12px;
    color: var(--voip-calc-text-light);
}

.currency-selector {
    display: flex;
    align-items: center;
    gap: 12px;
}

.currency-selector label {
    font-weight: 600;
    color: var(--voip-calc-text);
    font-size: 15px;
}

.currency-selector select {
    padding: 10px 16px;
    border: 1px solid var(--voip-calc-border);
    border-radius: var(--voip-calc-radius-sm);
    font-size: 14px;
    font-weight: 600;
    color: var(--voip-calc-text);
    background: var(--voip-calc-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    z-index: 10;
    min-width: 120px;
    appearance: auto;
    -webkit-appearance: menulist;
    -moz-appearance: menulist;
}

.currency-selector select:hover {
    border-color: var(--voip-calc-primary);
}

.currency-selector select:focus {
    outline: none;
    border-color: var(--voip-calc-primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.voip-calc-wrapper {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 32px;
    align-items: start;
}

@media (max-width: 1024px) {
    .voip-calc-wrapper {
        grid-template-columns: 1fr;
    }

    .voip-calc-sidebar {
        order: -1;
    }
}

.voip-calc-main {
    background: #fff;
    border: 1px solid var(--voip-calc-border);
    border-radius: var(--voip-calc-radius);
    box-shadow: var(--voip-calc-shadow);
    padding: 32px;
}

@media (max-width: 768px) {
    .voip-calc-main {
        padding: 24px;
    }
}

.voip-calc-progress {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 48px;
    position: relative;
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    position: relative;
    z-index: 2;
}

.step-number {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--voip-calc-secondary);
    border: 2px solid var(--voip-calc-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 15px;
    color: var(--voip-calc-text-light);
    transition: all 0.2s ease;
}

.progress-step.active .step-number {
    background: var(--voip-calc-primary);
    border-color: var(--voip-calc-primary);
    color: #fff;
    box-shadow: 0 0 0 4px rgba(13, 148, 136, 0.15);
}

.progress-step.completed .step-number {
    background: var(--voip-calc-success);
    border-color: var(--voip-calc-success);
    color: #fff;
}

.step-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--voip-calc-text-light);
    text-align: center;
}

.progress-step.active .step-label {
    color: var(--voip-calc-primary);
    font-weight: 600;
}

.progress-line {
    flex: 1;
    height: 2px;
    background: var(--voip-calc-border);
    margin: 0 -10px;
    position: relative;
    top: -20px;
}

@media (max-width: 768px) {
    .step-label {
        display: none;
    }

    .step-number {
        width: 40px;
        height: 40px;
        font-size: 14px;
    }
}

.voip-calc-content h2 {
    margin: 0 0 12px;
    font-size: 28px;
    font-weight: 700;
    color: var(--voip-calc-text);
}

.step-description {
    margin: 0 0 32px;
    color: var(--voip-calc-text-light);
    font-size: 16px;
}

.calc-step {
    display: none;
}

.calc-step.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.service-types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.service-type-card {
    background: #fff;
    border: 2px solid var(--voip-calc-border);
    border-radius: var(--voip-calc-radius);
    padding: 24px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.service-type-card:hover {
    border-color: var(--voip-calc-primary);
    box-shadow: var(--voip-calc-shadow-md);
    transform: translateY(-2px);
}

.service-type-card.selected {
    border-color: var(--voip-calc-primary);
    background: var(--voip-calc-primary-light);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

.service-icon-wrapper {
    position: relative;
    margin-bottom: 16px;
}

.service-icon {
    font-size: 48px;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--voip-calc-primary);
    animation: fadeIn 0.4s ease forwards;
}

.service-icon i {
    display: inline-block;
}

.service-name-badge {
    background: linear-gradient(135deg, var(--voip-calc-primary) 0%, var(--voip-calc-primary-dark) 100%);
    color: white;
    font-weight: 600;
    font-size: 16px;
    padding: 10px 16px;
    border-radius: var(--voip-calc-radius-sm);
    text-align: center;
    letter-spacing: 0.3px;
    box-shadow: 0 2px 8px rgba(13, 148, 136, 0.25);
}

.service-type-card h3 {
    margin: 0 0 12px;
    font-size: 18px;
    font-weight: 600;
    color: var(--voip-calc-text);
}

.service-type-card p {
    margin: 0;
    color: var(--voip-calc-text-light);
    font-size: 14px;
    line-height: 1.5;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--voip-calc-text);
    font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 1px solid var(--voip-calc-border);
    border-radius: var(--voip-calc-radius-sm);
    font-size: 15px;
    font-family: inherit;
    transition: all 0.2s ease;
    background: #fff;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--voip-calc-primary);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.addons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.addon-card {
    background: #fff;
    border: 2px solid var(--voip-calc-border);
    border-radius: var(--voip-calc-radius);
    padding: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.addon-card:hover {
    border-color: var(--voip-calc-primary);
    box-shadow: var(--voip-calc-shadow-md);
}

.addon-card.selected {
    border-color: var(--voip-calc-primary);
    background: var(--voip-calc-primary-light);
}

.addon-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.addon-icon {
    font-size: 24px;
    font-family: 'Font Awesome 6 Free', sans-serif;
    font-weight: 900;
}

.addon-name {
    font-weight: 600;
    color: var(--voip-calc-text);
    font-size: 16px;
}

.addon-description {
    color: var(--voip-calc-text-light);
    font-size: 14px;
    margin: 8px 0;
}

.addon-price {
    color: var(--voip-calc-primary);
    font-weight: 700;
    font-size: 16px;
    margin-top: 12px;
}

.addon-country-selector {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--voip-calc-border);
}

.international-country-select {
    width: 100%;
    padding: 8px 12px;
    border: 2px solid var(--voip-calc-border);
    border-radius: 6px;
    font-size: 14px;
    background: #fff;
    cursor: pointer;
}

.international-country-select:focus {
    outline: none;
    border-color: var(--voip-calc-primary);
}

.calc-step-actions {
    display: flex;
    gap: 16px;
    justify-content: flex-end;
    margin-top: 32px;
}

.calc-btn {
    padding: 12px 24px;
    border-radius: var(--voip-calc-radius-sm);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.calc-btn-primary {
    background: var(--voip-calc-primary);
    color: #fff;
}

.calc-btn-primary:hover:not(:disabled) {
    background: var(--voip-calc-primary-dark);
    box-shadow: 0 4px 12px rgba(13, 148, 136, 0.3);
    transform: translateY(-1px);
}

.calc-btn-primary:disabled {
    background: #94a3b8;
    cursor: not-allowed;
    opacity: 0.7;
}

.calc-btn-secondary {
    background: var(--voip-calc-secondary);
    color: var(--voip-calc-text);
    border: 1px solid var(--voip-calc-border);
}

.calc-btn-secondary:hover {
    background: var(--voip-calc-border);
}

.voip-calc-sidebar {
    position: sticky;
    top: 20px;
}

.sidebar-sticky {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.summary-card,
.roi-card {
    background: #fff;
    border: 1px solid var(--voip-calc-border);
    border-radius: var(--voip-calc-radius);
    box-shadow: var(--voip-calc-shadow);
    padding: 24px;
}

.summary-card h3,
.roi-card h3 {
    margin: 0 0 16px;
    font-size: 18px;
    font-weight: 600;
    color: var(--voip-calc-text);
    padding-bottom: 16px;
    border-bottom: 1px solid var(--voip-calc-border);
}

.roi-card h4 {
    margin: 16px 0 12px;
    font-size: 14px;
    font-weight: 600;
    color: var(--voip-calc-text);
}

.roi-cost-comparison {
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding: 20px;
    background: var(--voip-calc-secondary);
    border-radius: 8px;
    margin-bottom: 24px;
    gap: 20px;
}

.cost-item {
    text-align: center;
    flex: 1;
}

.cost-label {
    font-size: 13px;
    color: var(--voip-calc-text-light);
    margin-bottom: 8px;
    font-weight: 500;
}

.cost-value {
    font-size: 24px;
    font-weight: 700;
}

.cost-value.current {
    color: var(--voip-calc-danger);
}

.cost-value.new {
    color: var(--voip-calc-primary);
}

.cost-arrow {
    font-size: 24px;
    color: var(--voip-calc-text-light);
    font-weight: 300;
}

.roi-breakdown {
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
    margin-bottom: 24px;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--voip-calc-border);
}

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

.breakdown-label {
    font-size: 14px;
    color: var(--voip-calc-text);
    font-weight: 500;
}

.breakdown-value {
    font-size: 16px;
    color: var(--voip-calc-primary);
    font-weight: 700;
}

.summary-empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--voip-calc-text-light);
}

.summary-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
}

.summary-item.service-name {
    color: var(--voip-calc-primary);
    font-size: 16px;
    padding-bottom: 16px;
}

.summary-divider {
    height: 1px;
    background: var(--voip-calc-border);
    margin: 8px 0 16px;
}

.summary-item strong {
    font-size: 18px;
    color: var(--voip-calc-text);
}

.summary-disclaimer,
.roi-disclaimer {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--voip-calc-border);
    font-size: 12px;
    color: var(--voip-calc-text-light);
    line-height: 1.5;
}

.roi-kpis {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 24px;
}

.roi-kpi {
    background: var(--voip-calc-secondary);
    padding: 14px;
    border-radius: var(--voip-calc-radius-sm);
    text-align: center;
}

.kpi-label {
    font-size: 11px;
    color: var(--voip-calc-text-light);
    margin-bottom: 6px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.kpi-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--voip-calc-primary);
}

.kpi-value.success {
    color: var(--voip-calc-success);
}

.kpi-value.danger {
    color: var(--voip-calc-danger);
}

.roi-kpi.highlight {
    background: var(--voip-calc-primary-light);
    border: 1px solid rgba(13, 148, 136, 0.2);
}

.roi-kpi.highlight .kpi-value {
    color: var(--voip-calc-primary-dark);
}

.payback-timeline {
    margin: 24px 0;
    padding: 16px;
    background: var(--voip-calc-secondary);
    border-radius: var(--voip-calc-radius-sm);
}

.payback-timeline h4 {
    margin: 0 0 16px;
    font-size: 14px;
    font-weight: 600;
    color: var(--voip-calc-text);
}

.timeline-bar {
    position: relative;
    height: 32px;
    background: #e2e8f0;
    border-radius: 16px;
    overflow: hidden;
}

.timeline-progress {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--voip-calc-danger) 0%, var(--voip-calc-warning) 50%, var(--voip-calc-success) 100%);
    border-radius: 16px;
    transition: width 0.5s ease;
}

.timeline-marker {
    position: absolute;
    top: 0;
    width: 4px;
    height: 100%;
    background: var(--voip-calc-text);
    transform: translateX(-50%);
    transition: left 0.5s ease;
}

.timeline-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 11px;
    color: var(--voip-calc-text-light);
}

.payback-value {
    text-align: center;
    margin-top: 12px;
    font-size: 14px;
    font-weight: 600;
    color: var(--voip-calc-text);
}

.roi-charts-wrapper {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin: 20px 0;
}

.roi-chart-section {
    background: var(--voip-calc-secondary);
    border-radius: 8px;
    padding: 16px;
}

.roi-chart-section h4 {
    margin: 0 0 12px;
    font-size: 14px;
    font-weight: 600;
    color: var(--voip-calc-text);
}

.roi-chart-container {
    height: 180px;
}

.quote-form {
    max-width: 100%;
}

.quote-success {
    text-align: center;
    padding: 60px 20px;
}

.success-icon {
    width: 80px;
    height: 80px;
    background: var(--voip-calc-success);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: #fff;
    margin: 0 auto 24px;
}

.quote-success h3 {
    font-size: 28px;
    margin: 0 0 16px;
    color: var(--voip-calc-text);
}

.quote-success p {
    font-size: 16px;
    color: var(--voip-calc-text-light);
    line-height: 1.6;
    max-width: 500px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }

    .service-types-grid,
    .addons-grid {
        grid-template-columns: 1fr;
    }

    .calc-step-actions {
        flex-direction: column-reverse;
    }

    .calc-btn {
        width: 100%;
    }

    .roi-kpis {
        grid-template-columns: 1fr;
    }
}

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.slider-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

.voip-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: #e2e8f0;
    outline: none;
    cursor: pointer;
}

.voip-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--voip-calc-primary);
    cursor: pointer;
    border: 3px solid #fff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

.voip-slider::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--voip-calc-primary);
    cursor: pointer;
    border: 3px solid #fff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

.slider-value {
    min-width: 36px;
    text-align: center;
    font-weight: 700;
    font-size: 18px;
    color: var(--voip-calc-primary);
    background: rgba(0, 102, 204, 0.08);
    border-radius: 8px;
    padding: 4px 10px;
}

.config-notice {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    background: #fef3c7;
    border: 1px solid #f59e0b;
    border-radius: 8px;
    padding: 12px 16px;
    margin: 8px 0 16px;
    font-size: 13px;
    line-height: 1.5;
    color: #92400e;
}

.config-notice .notice-icon {
    font-size: 18px;
    line-height: 1;
    flex-shrink: 0;
    margin-top: 1px;
}

.config-notice .notice-text {
    flex: 1;
}

.summary-service-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--voip-calc-border);
    margin-bottom: 16px;
}

.summary-service-icon {
    width: 40px;
    height: 40px;
    background: var(--voip-calc-primary-light);
    border-radius: var(--voip-calc-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--voip-calc-primary);
    font-size: 18px;
}

.summary-service-info p {
    margin: 0;
}

.summary-service-info .service-name {
    font-weight: 600;
    color: var(--voip-calc-text);
    font-size: 15px;
}

.summary-service-info .service-label {
    font-size: 12px;
    color: var(--voip-calc-text-light);
}

.info-box {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px;
    border-radius: var(--voip-calc-radius-sm);
    font-size: 13px;
}

.info-box.info {
    background: #eff6ff;
    color: #1e40af;
}

.info-box.warning {
    background: #fef3c7;
    color: #92400e;
}

.info-box.success {
    background: #dcfce7;
    color: #166534;
}

.info-box-icon {
    font-size: 16px;
    flex-shrink: 0;
    margin-top: 1px;
}

.info-box-text {
    flex: 1;
    line-height: 1.5;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
}

.summary-row.highlight {
    padding: 12px 0;
}

.summary-row .label {
    color: var(--voip-calc-text-light);
    font-size: 14px;
}

.summary-row .value {
    font-weight: 600;
    color: var(--voip-calc-text);
}

.summary-row.highlight .value {
    font-size: 18px;
    color: var(--voip-calc-primary);
}

.breakdown-section {
    padding-top: 12px;
    border-top: 1px solid var(--voip-calc-border);
    margin-top: 12px;
}

.breakdown-section .section-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--voip-calc-text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.breakdown-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    font-size: 13px;
}

.breakdown-row .label {
    color: var(--voip-calc-text-light);
}

.breakdown-row .value {
    color: var(--voip-calc-text);
    font-weight: 500;
}

.roi-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
}

.roi-row .label {
    color: var(--voip-calc-text-light);
    font-size: 14px;
}

.roi-row .value-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
}

.roi-row .value {
    font-weight: 600;
}

.roi-row .value.positive {
    color: var(--voip-calc-success);
}

.roi-row .value.negative {
    color: var(--voip-calc-danger);
}

.roi-row .value.neutral {
    color: var(--voip-calc-info);
}

.roi-row.highlight .value {
    font-size: 18px;
}

.trend-icon {
    width: 16px;
    height: 16px;
}

.trend-icon.up {
    color: var(--voip-calc-success);
}

.trend-icon.down {
    color: var(--voip-calc-danger);
}

.savings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 16px 0;
}

.savings-box {
    padding: 12px;
    border-radius: var(--voip-calc-radius-sm);
}

.savings-box.telecom {
    background: #eff6ff;
}

.savings-box.operational {
    background: var(--voip-calc-primary-light);
}

.savings-box .savings-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin-bottom: 4px;
}

.savings-box.telecom .savings-label {
    color: var(--voip-calc-info);
}

.savings-box.operational .savings-label {
    color: var(--voip-calc-primary);
}

.savings-box .savings-value {
    font-size: 16px;
    font-weight: 700;
}

.savings-box.telecom .savings-value {
    color: #1e40af;
}

.savings-box.operational .savings-value {
    color: var(--voip-calc-primary-dark);
}

.savings-box .savings-period {
    font-size: 11px;
    font-weight: 400;
    opacity: 0.8;
}