/* ============================================
   CALCULADORA DE PRESUPUESTO
   Rediseñado con UI/UX Pro Max: patrón Funnel +
   progressive disclosure, tarjetas con SVG,
   validación inline, focus states, reduced-motion
   ============================================ */

.calculator-section {
    padding: 80px 0;
    background:
        radial-gradient(circle at 10% 20%, rgba(45, 138, 122, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(64, 165, 120, 0.07) 0%, transparent 45%),
        linear-gradient(135deg, #f6faf8 0%, #eaf2ee 100%);
    position: relative;
}

.calculator-container {
    max-width: 920px;
    margin: 0 auto;
    background: var(--color-white);
    border-radius: 24px;
    border: 1px solid rgba(45, 95, 79, 0.08);
    box-shadow: 0 20px 60px rgba(32, 94, 78, 0.12);
    overflow: hidden;
}

/* ---------- Header ---------- */
.calculator-header {
    background: linear-gradient(135deg, var(--color-green-dark) 0%, var(--color-green-main) 75%, #2d5f4f 130%);
    color: white;
    padding: 44px 40px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.calculator-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 85% 15%, rgba(255,255,255,0.14) 0%, transparent 45%);
    pointer-events: none;
}

.calculator-badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    background: rgba(255, 255, 255, 0.16);
    border: 1px solid rgba(255, 255, 255, 0.28);
    color: #fff;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 5px 14px;
    border-radius: 20px;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
}

.calculator-badge svg {
    flex-shrink: 0;
    opacity: 0.9;
}

.calculator-header h2 {
    margin: 0 0 10px;
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    position: relative;
    z-index: 1;
}

.calculator-header p {
    margin: 0 auto;
    font-size: 1.05rem;
    color: #ffffff;
    opacity: 0.95;
    max-width: 520px;
    position: relative;
    z-index: 1;
}

/* ---------- Progress Bar ---------- */
.calculator-progress {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 26px 40px 22px;
    background: var(--color-gray-light);
    border-bottom: 1px solid rgba(45, 95, 79, 0.08);
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    position: relative;
    min-width: 0;
}

.progress-step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    width: 100%;
    height: 3px;
    background: var(--color-gray-lighter);
    z-index: 1;
    transition: background 0.3s ease;
}

.progress-step.active:not(:last-child)::after,
.progress-step.completed:not(:last-child)::after {
    background: var(--color-green-main);
}

.progress-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-white);
    border: 3px solid var(--color-gray-lighter);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    color: #4a5568;
    z-index: 2;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-step.active .progress-circle {
    background: var(--color-green-main);
    border-color: var(--color-green-main);
    color: white;
    transform: scale(1.12);
    box-shadow: 0 4px 14px rgba(45, 138, 122, 0.35);
}

.progress-step.completed .progress-circle {
    background: var(--color-green-main);
    border-color: var(--color-green-main);
    color: white;
}

.progress-step.completed .progress-circle::after {
    content: '✓';
    font-size: 0.95rem;
}

.progress-label {
    margin-top: 8px;
    font-size: 0.82rem;
    color: #4a5568;
    font-weight: 500;
    text-align: center;
    line-height: 1.3;
    white-space: nowrap;
}

.progress-step.active .progress-label {
    color: var(--color-green-dark);
    font-weight: 700;
}

.progress-step.completed .progress-label {
    color: var(--color-green-main);
}

/* ---------- Calculator Body ---------- */
.calculator-body {
    padding: 40px;
    min-height: 400px;
}

.calc-step {
    display: none;
    animation: fadeIn 0.4s ease;
}

.calc-step.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.calc-step h3 {
    margin: 0 0 30px;
    font-size: 1.7rem;
    color: var(--color-green-dark);
    text-align: center;
    font-weight: 700;
    letter-spacing: -0.01em;
}

/* ---------- Cards Seleccionables ---------- */
.calc-options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
    margin-bottom: 30px;
}

.calc-option {
    border: 2px solid var(--color-gray-lighter);
    border-radius: 16px;
    padding: 26px 22px 22px;
    cursor: pointer;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
    background: var(--color-white);
    position: relative;
    text-align: center;
}

.calc-option:hover {
    border-color: var(--color-green-light);
    transform: translateY(-4px);
    box-shadow: 0 10px 24px rgba(45, 138, 122, 0.14);
}

.calc-option:focus-visible {
    outline: 3px solid rgba(45, 138, 122, 0.4);
    outline-offset: 2px;
}

.calc-option.selected {
    border-color: var(--color-green-main);
    background: linear-gradient(160deg, rgba(45, 138, 122, 0.06) 0%, rgba(79, 172, 154, 0.04) 100%);
    box-shadow: 0 10px 28px rgba(45, 138, 122, 0.18);
}

.calc-option.selected::before {
    content: '';
    position: absolute;
    top: 12px;
    right: 12px;
    width: 26px;
    height: 26px;
    background: var(--color-green-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: checkPop 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.calc-option.selected::after {
    content: '';
    position: absolute;
    top: 17px;
    right: 17px;
    width: 8px;
    height: 4px;
    border-left: 2.5px solid #fff;
    border-bottom: 2.5px solid #fff;
    transform: rotate(-45deg);
    animation: checkPop 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes checkPop {
    from {
        transform: scale(0);
        opacity: 0;
    }
    to {
        transform: scale(1) rotate(-45deg);
        opacity: 1;
    }
}

.calc-option-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 72px;
    height: 72px;
    border-radius: 20px;
    background: var(--color-green-lighter);
    color: var(--color-green-dark);
    margin-bottom: 16px;
    transition: transform 0.25s ease, background-color 0.25s ease, color 0.25s ease;
}

.calc-option:hover .calc-option-icon {
    transform: scale(1.06);
}

.calc-option.selected .calc-option-icon {
    background: var(--color-green-main);
    color: #fff;
}

.calc-option-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-green-dark);
    margin-bottom: 8px;
}

.calc-option-desc {
    font-size: 0.88rem;
    color: #4a5568;
    line-height: 1.5;
}

.calc-option-price {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1.5px solid var(--color-gray-lighter);
    font-weight: 700;
    color: var(--color-green-main);
    font-size: 1rem;
}

/* ---------- Slider de Área ---------- */
.calc-slider-container {
    margin: 40px 0;
}

.calc-slider-labels {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
}

.calc-slider-label {
    font-weight: 600;
    color: var(--color-green-dark);
    font-size: 0.95rem;
}

.calc-slider-label span {
    color: var(--color-green-main);
    font-weight: 700;
}

.calc-slider-value {
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--color-green-main);
    text-align: center;
    margin: 20px 0;
    letter-spacing: -0.02em;
}

.calc-slider-value span {
    font-size: 1.5rem;
    color: #4a5568;
    font-weight: 500;
}

.calc-slider {
    width: 100%;
    height: 10px;
    border-radius: 6px;
    background: linear-gradient(90deg, var(--color-green-main) 0%, var(--color-green-main) var(--calc-fill, 9%), var(--color-gray-lighter) var(--calc-fill, 9%));
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
    transition: background 0.1s linear;
}

.calc-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-green-main);
    border: 4px solid #fff;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(45, 138, 122, 0.35);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.calc-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: 0 6px 18px rgba(45, 138, 122, 0.45);
}

.calc-slider::-moz-range-thumb {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-green-main);
    border: 4px solid #fff;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(45, 138, 122, 0.35);
}

.calc-slider::-moz-range-track {
    height: 10px;
    border-radius: 6px;
    background: transparent;
}

.calc-slider:focus-visible {
    outline: 3px solid rgba(45, 138, 122, 0.35);
    outline-offset: 4px;
}

.calc-area-info {
    display: flex;
    justify-content: space-around;
    margin-top: 30px;
    padding: 22px 20px;
    background: var(--color-green-lighter);
    border-radius: 14px;
    gap: 16px;
}

.calc-area-stat {
    text-align: center;
    flex: 1;
}

.calc-area-stat-label {
    font-size: 0.88rem;
    color: #4a5568;
    margin-bottom: 6px;
    font-weight: 500;
}

.calc-area-stat-value {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-green-dark);
}

/* ---------- Extras (Checkboxes) ---------- */
.calc-extras-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: 14px;
    margin-bottom: 30px;
}

.calc-extra {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 18px;
    border: 2px solid var(--color-gray-lighter);
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--color-white);
    position: relative;
}

.calc-extra:hover {
    border-color: var(--color-green-light);
    background: var(--color-green-lighter);
}

.calc-extra:focus-within {
    outline: 3px solid rgba(45, 138, 122, 0.35);
    outline-offset: 1px;
}

.calc-extra.checked {
    border-color: var(--color-green-main);
    background: linear-gradient(135deg, rgba(45, 138, 122, 0.06) 0%, rgba(79, 172, 154, 0.04) 100%);
}

.calc-extra input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-top: 2px;
    cursor: pointer;
    accent-color: var(--color-green-main);
    flex-shrink: 0;
}

.calc-extra-content {
    flex: 1;
}

.calc-extra-title {
    font-weight: 700;
    color: var(--color-green-dark);
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
}

.calc-extra-title svg {
    flex-shrink: 0;
    color: var(--color-green-main);
}

.calc-extra.checked .calc-extra-title svg {
    color: var(--color-green-dark);
}

.calc-extra-desc {
    font-size: 0.84rem;
    color: #4a5568;
    margin-bottom: 8px;
    line-height: 1.45;
}

.calc-extra-price {
    font-weight: 700;
    color: var(--color-green-main);
    font-size: 0.98rem;
}

/* ---------- Formulario de Contacto ---------- */
.calc-contact-form {
    max-width: 560px;
    margin: 0 auto;
}

.calc-form-row {
    margin-bottom: 20px;
}

.calc-form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--color-green-dark);
    font-size: 0.95rem;
}

.calc-form-input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--color-gray-lighter);
    border-radius: 12px;
    font-size: 1rem;
    background: var(--color-white);
    transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.calc-form-input:focus {
    outline: none;
    border-color: var(--color-green-main);
    box-shadow: 0 0 0 4px rgba(45, 138, 122, 0.12);
}

/* ---------- Resultado ---------- */
.calc-result {
    display: none;
    text-align: center;
    padding: 44px 36px;
    background: linear-gradient(160deg, rgba(45, 138, 122, 0.06) 0%, rgba(79, 172, 154, 0.04) 100%);
    border: 1.5px solid rgba(45, 138, 122, 0.14);
    border-radius: 18px;
    margin-top: 30px;
    animation: slideIn 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: scale(0.94) translateY(10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.calc-result.active {
    display: block;
}

.calc-result h3 {
    color: var(--color-green-dark);
    margin-bottom: 8px;
    font-size: 1.5rem;
}

.calc-result-range {
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--color-green-main);
    margin: 18px 0;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.calc-result-range span {
    display: block;
    font-size: 1.2rem;
    color: #4a5568;
    font-weight: 500;
}

.calc-result-details {
    text-align: left;
    max-width: 500px;
    margin: 26px auto;
    padding: 22px 24px;
    background: var(--color-white);
    border-radius: 14px;
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(45, 95, 79, 0.06);
}

.calc-result-item {
    display: flex;
    justify-content: space-between;
    padding: 11px 0;
    border-bottom: 1px solid var(--color-gray-lighter);
    gap: 16px;
}

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

.calc-result-item-label {
    color: #4a5568;
    font-weight: 500;
    font-size: 0.95rem;
}

.calc-result-item-value {
    color: var(--color-green-dark);
    font-weight: 700;
    text-align: right;
}

.calc-result-message {
    margin-top: 24px;
    padding: 18px;
    background: var(--color-green-lighter);
    border-radius: 12px;
    color: var(--color-green-dark);
    font-weight: 500;
    line-height: 1.6;
}

/* ---------- Botones de Navegación ---------- */
.calculator-footer {
    padding: 26px 40px;
    background: var(--color-gray-light);
    border-top: 1px solid rgba(45, 95, 79, 0.08);
    display: flex;
    justify-content: space-between;
    gap: 15px;
}

.calc-btn {
    padding: 15px 38px;
    border-radius: 12px;
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    border: none;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    position: relative;
    overflow: hidden;
}

.calc-btn:focus-visible {
    outline: 3px solid rgba(45, 138, 122, 0.4);
    outline-offset: 2px;
}

.calc-btn-prev {
    background: var(--color-white);
    color: var(--color-green-dark);
    border: 2px solid var(--color-green-main);
}

.calc-btn-prev:hover {
    background: var(--color-green-lighter);
    transform: translateX(-3px);
}

.calc-btn-next {
    background: linear-gradient(135deg, var(--color-green-main) 0%, var(--color-green-dark) 100%);
    color: white;
    margin-left: auto;
    box-shadow: 0 4px 16px rgba(45, 138, 122, 0.28);
}

.calc-btn-next:hover {
    transform: translateX(3px) translateY(-1px);
    box-shadow: 0 10px 26px rgba(45, 138, 122, 0.38);
}

.calc-btn-next:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.calc-btn-submit {
    background: linear-gradient(135deg, var(--color-green-main) 0%, var(--color-green-dark) 100%);
    color: white;
    width: 100%;
    justify-content: center;
    font-size: 1.15rem;
    padding: 18px 40px;
    box-shadow: 0 6px 20px rgba(45, 138, 122, 0.3);
}

.calc-btn-submit:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(45, 138, 122, 0.42);
}

/* ---------- Loading State ---------- */
.calc-loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

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

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    .calculator-section {
        padding: 48px 15px;
    }

    .calculator-header {
        padding: 32px 20px 28px;
    }

    .calculator-header h2 {
        font-size: 1.8rem;
    }

    .calculator-badge {
        font-size: 0.66rem;
        padding: 4px 12px;
    }

    .calculator-progress {
        padding: 20px 12px 18px;
        overflow-x: auto;
    }

    .progress-label {
        font-size: 0.68rem;
        white-space: normal;
        max-width: 64px;
    }

    .progress-circle {
        width: 36px;
        height: 36px;
    }

    .calculator-body {
        padding: 26px 18px;
    }

    .calc-step h3 {
        font-size: 1.35rem;
    }

    .calc-options-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .calc-option {
        padding: 20px 14px;
    }

    .calc-option-icon {
        width: 60px;
        height: 60px;
    }

    .calc-option-price {
        font-size: 0.9rem;
    }

    .calc-slider-value {
        font-size: 2.1rem;
    }

    .calc-extras-grid {
        grid-template-columns: 1fr;
    }

    .calc-area-info {
        flex-direction: column;
        gap: 12px;
    }

    .calc-result {
        padding: 30px 20px;
    }

    .calc-result-range {
        font-size: 1.9rem;
    }

    .calculator-footer {
        padding: 20px 16px;
        flex-direction: column;
    }

    .calc-btn {
        width: 100%;
        justify-content: center;
        padding: 14px 24px;
    }

    .calc-btn-next {
        margin-left: 0;
    }
}

@media (max-width: 480px) {
    .calc-options-grid {
        grid-template-columns: 1fr;
    }
}

/* ---------- Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
    .calc-step,
    .calc-result,
    .calc-option.selected::before,
    .calc-option.selected::after,
    .calc-btn,
    .calc-option,
    .calc-extra,
    .progress-step:not(:last-child)::after {
        transition: none;
        animation: none;
    }

    .calc-option:hover,
    .calc-btn:hover,
    .calc-btn-prev:hover,
    .calc-btn-next:hover,
    .calc-btn-submit:hover {
        transform: none;
    }
}

/* ---------- Dark Mode ---------- */
[data-theme="dark"] .calculator-section {
    background:
        radial-gradient(circle at 10% 20%, rgba(45, 138, 122, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(64, 165, 120, 0.08) 0%, transparent 45%),
        linear-gradient(135deg, #0f1715 0%, #162019 100%);
}

[data-theme="dark"] .calculator-container {
    background: var(--nm-secondary-bg, #162019);
    border-color: var(--nm-border, #1e2d27);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

[data-theme="dark"] .calculator-header {
    background: linear-gradient(135deg, #1d3a30 0%, #245040 70%, #2d5f4f 130%);
}

[data-theme="dark"] .calculator-progress {
    background: var(--nm-bg, #0f1715);
    border-bottom-color: var(--nm-border, #1e2d27);
}

[data-theme="dark"] .progress-circle {
    background: var(--nm-secondary-bg, #162019);
    border-color: var(--nm-border, #1e2d27);
    color: #9fb5ac;
}

[data-theme="dark"] .progress-step:not(:last-child)::after {
    background: var(--nm-border, #1e2d27);
}

[data-theme="dark"] .progress-label {
    color: #9fb5ac;
}

[data-theme="dark"] .progress-step.active .progress-label,
[data-theme="dark"] .progress-step.completed .progress-label {
    color: var(--nm-accent, #2d8a7a);
}

[data-theme="dark"] .calc-step h3 {
    color: var(--nm-text, #e8f0ed);
}

[data-theme="dark"] .calc-option {
    background: var(--nm-secondary-bg, #162019);
    border-color: var(--nm-border, #1e2d27);
}

[data-theme="dark"] .calc-option:hover {
    border-color: var(--nm-accent, #2d8a7a);
}

[data-theme="dark"] .calc-option.selected {
    background: linear-gradient(160deg, rgba(45, 138, 122, 0.16) 0%, rgba(45, 138, 122, 0.08) 100%);
    border-color: var(--nm-accent, #2d8a7a);
}

[data-theme="dark"] .calc-option-icon {
    background: rgba(45, 138, 122, 0.18);
    color: var(--nm-accent, #2d8a7a);
}

[data-theme="dark"] .calc-option.selected .calc-option-icon {
    background: var(--nm-accent, #2d8a7a);
    color: #fff;
}

[data-theme="dark"] .calc-option-title {
    color: var(--nm-text, #e8f0ed);
}

[data-theme="dark"] .calc-option-desc {
    color: #9fb5ac;
}

[data-theme="dark"] .calc-option-price {
    border-top-color: var(--nm-border, #1e2d27);
    color: var(--nm-accent, #2d8a7a);
}

[data-theme="dark"] .calc-slider-label,
[data-theme="dark"] .calc-area-stat-value {
    color: var(--nm-text, #e8f0ed);
}

[data-theme="dark"] .calc-slider-value {
    color: var(--nm-accent, #2d8a7a);
}

[data-theme="dark"] .calc-slider-value span {
    color: #9fb5ac;
}

[data-theme="dark"] .calc-slider {
    background: linear-gradient(90deg, var(--nm-accent, #2d8a7a) 0%, var(--nm-accent, #2d8a7a) var(--calc-fill, 9%), var(--nm-border, #1e2d27) var(--calc-fill, 9%));
}

[data-theme="dark"] .calc-slider::-webkit-slider-thumb {
    background: var(--nm-accent, #2d8a7a);
    border-color: #162019;
}

[data-theme="dark"] .calc-slider::-moz-range-thumb {
    background: var(--nm-accent, #2d8a7a);
    border-color: #162019;
}

[data-theme="dark"] .calc-area-info {
    background: var(--nm-bg, #0f1715);
}

[data-theme="dark"] .calc-area-stat-label {
    color: #9fb5ac;
}

[data-theme="dark"] .calc-extra {
    background: var(--nm-secondary-bg, #162019);
    border-color: var(--nm-border, #1e2d27);
}

[data-theme="dark"] .calc-extra:hover {
    background: var(--nm-bg, #0f1715);
    border-color: var(--nm-accent, #2d8a7a);
}

[data-theme="dark"] .calc-extra.checked {
    background: linear-gradient(135deg, rgba(45, 138, 122, 0.16) 0%, rgba(45, 138, 122, 0.08) 100%);
    border-color: var(--nm-accent, #2d8a7a);
}

[data-theme="dark"] .calc-extra-title {
    color: var(--nm-text, #e8f0ed);
}

[data-theme="dark"] .calc-extra-title svg {
    color: var(--nm-accent, #2d8a7a);
}

[data-theme="dark"] .calc-extra-desc {
    color: #9fb5ac;
}

[data-theme="dark"] .calc-form-label {
    color: var(--nm-text, #e8f0ed);
}

[data-theme="dark"] .calc-form-input {
    background: var(--nm-bg, #0f1715);
    border-color: var(--nm-border, #1e2d27);
    color: var(--nm-text, #e8f0ed);
}

[data-theme="dark"] .calc-form-input:focus {
    border-color: var(--nm-accent, #2d8a7a);
    box-shadow: 0 0 0 4px rgba(45, 138, 122, 0.2);
}

[data-theme="dark"] .calc-result {
    background: linear-gradient(160deg, rgba(45, 138, 122, 0.16) 0%, rgba(45, 138, 122, 0.08) 100%);
    border-color: rgba(45, 138, 122, 0.3);
}

[data-theme="dark"] .calc-result h3 {
    color: var(--nm-text, #e8f0ed);
}

[data-theme="dark"] .calc-result-range {
    color: var(--nm-accent, #2d8a7a);
}

[data-theme="dark"] .calc-result-range span {
    color: #9fb5ac;
}

[data-theme="dark"] .calc-result-details {
    background: var(--nm-secondary-bg, #162019);
    border-color: var(--nm-border, #1e2d27);
    box-shadow: none;
}

[data-theme="dark"] .calc-result-item {
    border-bottom-color: var(--nm-border, #1e2d27);
}

[data-theme="dark"] .calc-result-item-label {
    color: #9fb5ac;
}

[data-theme="dark"] .calc-result-item-value {
    color: var(--nm-text, #e8f0ed);
}

[data-theme="dark"] .calc-result-message {
    background: var(--nm-bg, #0f1715);
    color: var(--nm-text, #e8f0ed);
}

[data-theme="dark"] .calculator-footer {
    background: var(--nm-bg, #0f1715);
    border-top-color: var(--nm-border, #1e2d27);
}

[data-theme="dark"] .calc-btn-prev {
    background: var(--nm-secondary-bg, #162019);
    color: var(--nm-text, #e8f0ed);
    border-color: var(--nm-accent, #2d8a7a);
}

[data-theme="dark"] .calc-btn-prev:hover {
    background: rgba(45, 138, 122, 0.18);
}