/* ==========================================================================
   CALCULATOR — /calculator/
   God-tier МК calculator with live preview.
   ========================================================================== */

:root {
    --calc-ink:    #0B1B35;
    --calc-accent: #FF6A1C;
    --calc-blue:   #1756D1;
    --calc-muted:  #5B6A82;
    --calc-surf:   #F3F6FC;
    --calc-line:   rgba(11, 27, 53, 0.10);
}

/* ==================== HERO ==================== */
.rt-calc-hero {
    position: relative;
    overflow: hidden;
    padding: clamp(60px, 8vw, 110px) 0 clamp(40px, 6vw, 70px);
    background:
        radial-gradient(ellipse at 70% 15%, rgba(23, 86, 209, 0.28), transparent 50%),
        linear-gradient(160deg, #0A1A33 0%, #061226 100%);
    color: #fff;
}
.rt-calc-hero__blueprint {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 24px 24px;
    opacity: 0.55;
    mask-image: radial-gradient(ellipse at 50% 50%, #000 50%, transparent 90%);
    -webkit-mask-image: radial-gradient(ellipse at 50% 50%, #000 50%, transparent 90%);
}
.rt-calc-hero__overlay {
    position: absolute; inset: 0;
    background: radial-gradient(circle at 88% 82%, rgba(255, 106, 28, 0.25), transparent 50%);
}
.rt-calc-hero__inner { position: relative; z-index: 2; }

.rt-calc-hero__crumbs {
    font-size: 13px;
    color: rgba(255,255,255,0.72);
    margin-bottom: 20px;
}
.rt-calc-hero__crumbs a { color: inherit; text-decoration: none; }
.rt-calc-hero__crumbs a:hover { color: #fff; }
.rt-calc-hero__crumbs span { margin: 0 6px; color: rgba(255,255,255,0.4); }
.rt-calc-hero__crumbs span:last-child { margin: 0; color: #fff; }

.rt-calc-hero__eyebrow {
    display: inline-flex; align-items: center;
    padding: 7px 14px;
    background: rgba(255, 106, 28, 0.14);
    border: 1px solid rgba(255, 106, 28, 0.35);
    color: #FFB682;
    font-size: 12px; font-weight: 600; letter-spacing: 0.04em;
    text-transform: uppercase;
    border-radius: 999px;
    margin-bottom: 22px;
}
.rt-calc-hero__title {
    font-family: 'Montserrat', 'Inter', sans-serif;
    font-weight: 900;
    font-size: clamp(34px, 5.2vw, 60px);
    line-height: 1.05;
    letter-spacing: -0.02em;
    margin: 0 0 20px;
    color: #fff;
}
.rt-calc-hero__accent {
    background: linear-gradient(120deg, var(--calc-accent), #FFA566);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
}
.rt-calc-hero__lead {
    max-width: 740px;
    font-size: clamp(16px, 1.2vw, 18.5px);
    line-height: 1.55;
    color: rgba(255,255,255,0.78);
    margin: 0;
}

/* ==================== APP LAYOUT ==================== */
.rt-calc-app {
    padding: clamp(40px, 5vw, 70px) 0 clamp(60px, 8vw, 100px);
    background: #fff;
}
.rt-calc-app__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 380px;
    gap: 40px;
    align-items: start;
}
@media (max-width: 1100px) {
    .rt-calc-app__grid { grid-template-columns: 1fr; }
}

/* ==================== FORM COLUMN ==================== */
.rt-calc-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.rt-calc-step {
    padding: 30px 30px 28px;
    background: #fff;
    border: 1px solid var(--calc-line);
    border-radius: 18px;
    transition: border-color .22s, box-shadow .22s;
}
.rt-calc-step:hover { border-color: rgba(23, 86, 209, 0.2); }

.rt-calc-step__hd {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 22px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--calc-line);
}
.rt-calc-step__n {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center; justify-content: center;
    width: 44px; height: 44px;
    background: linear-gradient(135deg, var(--calc-accent), var(--calc-blue));
    color: #fff;
    font-family: 'Montserrat', sans-serif;
    font-size: 15px; font-weight: 800;
    border-radius: 12px;
    letter-spacing: -0.01em;
}
.rt-calc-step__hd h2 {
    font-family: 'Montserrat', sans-serif;
    font-size: 20px; font-weight: 700;
    color: var(--calc-ink);
    margin: 0 0 3px;
    letter-spacing: -0.01em;
}
.rt-calc-step__hd p {
    font-size: 13px;
    color: var(--calc-muted);
    margin: 0;
}

/* ==================== RADIO CARD GRID ==================== */
.rt-calc-types,
.rt-calc-grades,
.rt-calc-akz,
.rt-calc-install,
.rt-calc-delivery,
.rt-calc-urgency,
.rt-calc-design {
    display: grid;
    gap: 10px;
}
.rt-calc-types    { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
.rt-calc-grades   { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.rt-calc-akz,
.rt-calc-install,
.rt-calc-delivery { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.rt-calc-urgency  { grid-template-columns: repeat(3, 1fr); }
.rt-calc-design   { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 600px) {
    .rt-calc-urgency,
    .rt-calc-design { grid-template-columns: 1fr; }
}

/* Hide radios/checkboxes visually */
.rt-calc-type input,
.rt-calc-grade input,
.rt-calc-akz-item input,
.rt-calc-install-item input,
.rt-calc-delivery-item input,
.rt-calc-urgency-item input,
.rt-calc-check input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

/* Generic card style */
.rt-calc-type,
.rt-calc-grade,
.rt-calc-akz-item,
.rt-calc-install-item,
.rt-calc-delivery-item,
.rt-calc-urgency-item,
.rt-calc-check {
    position: relative;
    display: block;
    cursor: pointer;
}
.rt-calc-type__card,
.rt-calc-grade__card,
.rt-calc-akz-item__card,
.rt-calc-install-item__card,
.rt-calc-delivery-item__card,
.rt-calc-urgency-item__card,
.rt-calc-check__card {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 14px 16px;
    background: var(--calc-surf);
    border: 1.5px solid transparent;
    border-radius: 12px;
    transition: background .2s, border-color .2s, transform .2s;
    height: 100%;
}
.rt-calc-type:hover .rt-calc-type__card,
.rt-calc-grade:hover .rt-calc-grade__card,
.rt-calc-akz-item:hover .rt-calc-akz-item__card,
.rt-calc-install-item:hover .rt-calc-install-item__card,
.rt-calc-delivery-item:hover .rt-calc-delivery-item__card,
.rt-calc-urgency-item:hover .rt-calc-urgency-item__card,
.rt-calc-check:hover .rt-calc-check__card {
    background: rgba(23, 86, 209, 0.06);
    border-color: rgba(23, 86, 209, 0.2);
}

/* Checked state */
.rt-calc-type input:checked ~ .rt-calc-type__card,
.rt-calc-grade input:checked ~ .rt-calc-grade__card,
.rt-calc-akz-item input:checked ~ .rt-calc-akz-item__card,
.rt-calc-install-item input:checked ~ .rt-calc-install-item__card,
.rt-calc-delivery-item input:checked ~ .rt-calc-delivery-item__card,
.rt-calc-urgency-item input:checked ~ .rt-calc-urgency-item__card,
.rt-calc-check input:checked ~ .rt-calc-check__card {
    background: linear-gradient(120deg, rgba(23, 86, 209, 0.1), rgba(255, 106, 28, 0.08));
    border-color: var(--calc-accent);
    box-shadow: 0 6px 20px -8px rgba(255, 106, 28, 0.35);
}
.rt-calc-type input:checked ~ .rt-calc-type__card::before,
.rt-calc-grade input:checked ~ .rt-calc-grade__card::before,
.rt-calc-akz-item input:checked ~ .rt-calc-akz-item__card::before,
.rt-calc-install-item input:checked ~ .rt-calc-install-item__card::before,
.rt-calc-delivery-item input:checked ~ .rt-calc-delivery-item__card::before,
.rt-calc-urgency-item input:checked ~ .rt-calc-urgency-item__card::before,
.rt-calc-check input:checked ~ .rt-calc-check__card::before {
    content: '✓';
    position: absolute;
    top: 10px; right: 12px;
    display: inline-flex;
    align-items: center; justify-content: center;
    width: 18px; height: 18px;
    background: var(--calc-accent);
    color: #fff;
    font-size: 11px; font-weight: 800;
    border-radius: 50%;
    z-index: 2;
}

/* Focus-visible (keyboard) */
.rt-calc-type input:focus-visible ~ .rt-calc-type__card,
.rt-calc-grade input:focus-visible ~ .rt-calc-grade__card,
.rt-calc-akz-item input:focus-visible ~ .rt-calc-akz-item__card,
.rt-calc-install-item input:focus-visible ~ .rt-calc-install-item__card,
.rt-calc-delivery-item input:focus-visible ~ .rt-calc-delivery-item__card,
.rt-calc-urgency-item input:focus-visible ~ .rt-calc-urgency-item__card,
.rt-calc-check input:focus-visible ~ .rt-calc-check__card {
    outline: 2px solid var(--calc-blue);
    outline-offset: 2px;
}

/* Card text typography */
.rt-calc-type__card strong,
.rt-calc-grade__card strong,
.rt-calc-akz-item__card strong,
.rt-calc-install-item__card strong,
.rt-calc-delivery-item__card strong,
.rt-calc-urgency-item__card strong,
.rt-calc-check__card strong {
    font-family: 'Montserrat', sans-serif;
    font-size: 14.5px; font-weight: 700;
    color: var(--calc-ink);
    line-height: 1.25;
    letter-spacing: -0.01em;
}
.rt-calc-type__card em,
.rt-calc-grade__card em,
.rt-calc-akz-item__card em,
.rt-calc-install-item__card em,
.rt-calc-delivery-item__card em,
.rt-calc-urgency-item__card em,
.rt-calc-check__card em {
    font-style: normal;
    font-size: 12.5px;
    color: var(--calc-muted);
    line-height: 1.4;
}
.rt-calc-check__card em b {
    font-weight: 700;
    color: var(--calc-accent);
}
.rt-calc-grade__price,
.rt-calc-akz-item__price {
    margin-top: 6px;
    display: inline-block;
    padding: 3px 8px;
    background: #fff;
    border: 1px solid var(--calc-line);
    border-radius: 6px;
    font-size: 12px; font-weight: 700;
    color: var(--calc-ink);
    width: fit-content;
}

/* ==================== PARAMETERS / SLIDER ==================== */
.rt-calc-params {
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.rt-calc-field label {
    display: block;
    margin-bottom: 8px;
    font-size: 13px; font-weight: 600;
    color: var(--calc-ink);
    letter-spacing: 0.01em;
}
.rt-calc-slider-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
}
.rt-calc-slider-wrap input[type="range"] {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: linear-gradient(to right, var(--calc-accent) 0%, var(--calc-accent) var(--fill, 20%), var(--calc-surf) var(--fill, 20%), var(--calc-surf) 100%);
    border-radius: 999px;
    outline: none;
}
.rt-calc-slider-wrap input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 22px; height: 22px;
    background: #fff;
    border: 3px solid var(--calc-accent);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 10px -3px rgba(255, 106, 28, 0.5);
    transition: transform .15s;
}
.rt-calc-slider-wrap input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.12);
}
.rt-calc-slider-wrap input[type="range"]::-moz-range-thumb {
    width: 22px; height: 22px;
    background: #fff;
    border: 3px solid var(--calc-accent);
    border-radius: 50%;
    cursor: pointer;
}
.rt-calc-slider-wrap input[type="number"] {
    width: 110px;
    padding: 10px 12px;
    border: 1.5px solid var(--calc-line);
    background: #fff;
    border-radius: 10px;
    font-family: 'Montserrat', sans-serif;
    font-size: 15px; font-weight: 700;
    color: var(--calc-ink);
    text-align: right;
    outline: none;
    transition: border-color .2s;
}
.rt-calc-slider-wrap input[type="number"]:focus {
    border-color: var(--calc-accent);
}

.rt-calc-readout {
    display: inline-block;
    padding: 12px 18px;
    background: linear-gradient(135deg, var(--calc-ink), #1A2D50);
    color: #FFB682;
    font-family: 'Montserrat', sans-serif;
    font-size: 22px; font-weight: 800;
    letter-spacing: -0.01em;
    border-radius: 10px;
}

.rt-calc-advanced {
    margin-top: 8px;
    padding: 14px 16px;
    background: var(--calc-surf);
    border-radius: 10px;
}
.rt-calc-advanced summary {
    cursor: pointer;
    font-size: 13px; font-weight: 600;
    color: var(--calc-blue);
    list-style: none;
    display: flex; align-items: center; gap: 6px;
}
.rt-calc-advanced summary::-webkit-details-marker { display: none; }
.rt-calc-advanced summary::before {
    content: '▸';
    display: inline-block;
    font-size: 10px;
    transition: transform .2s;
}
.rt-calc-advanced[open] summary::before { transform: rotate(90deg); }
.rt-calc-advanced[open] { padding-bottom: 18px; }
.rt-calc-advanced .rt-calc-field { margin-top: 14px; }

/* ==================== RESULT (STICKY) ==================== */
.rt-calc-result {
    position: sticky;
    top: 100px;
    align-self: start;
}
@media (max-width: 1100px) {
    .rt-calc-result {
        position: static;
    }
}
.rt-calc-result__inner {
    padding: 30px 28px 24px;
    background:
        radial-gradient(circle at 90% 10%, rgba(255, 106, 28, 0.22), transparent 50%),
        linear-gradient(160deg, #0A1A33 0%, #061226 100%);
    color: #fff;
    border-radius: 22px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 30px 60px -30px rgba(11, 27, 53, 0.5);
}
.rt-calc-result__inner::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 24px 24px;
    pointer-events: none;
    opacity: 0.8;
}
.rt-calc-result__inner > * { position: relative; z-index: 1; }

.rt-calc-result__eyebrow {
    display: inline-block;
    padding: 6px 12px;
    background: rgba(255, 106, 28, 0.18);
    color: #FFB682;
    font-size: 11px; font-weight: 700;
    letter-spacing: 0.12em; text-transform: uppercase;
    border-radius: 6px;
    margin-bottom: 16px;
}

.rt-calc-result__total {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-bottom: 10px;
}
.rt-calc-result__amount {
    font-family: 'Montserrat', sans-serif;
    font-size: clamp(32px, 3.6vw, 44px);
    font-weight: 900;
    line-height: 1;
    letter-spacing: -0.02em;
    background: linear-gradient(120deg, #fff, #FFB682);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
}
.rt-calc-result__total small {
    font-size: 20px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.7);
}
.rt-calc-result__per-ton {
    font-size: 13.5px;
    color: rgba(255, 255, 255, 0.7);
    margin: 0 0 18px;
}
.rt-calc-result__per-ton span { color: #FFB682; font-weight: 700; }

.rt-calc-result__duration {
    padding: 12px 14px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    font-size: 13.5px;
    color: rgba(255, 255, 255, 0.88);
    margin-bottom: 22px;
}
.rt-calc-result__duration strong { color: #fff; }

.rt-calc-breakdown {
    list-style: none;
    margin: 0 0 22px;
    padding: 18px 0 0;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.rt-calc-breakdown li {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    font-size: 13.5px;
    color: rgba(255, 255, 255, 0.75);
}
.rt-calc-breakdown li b {
    font-weight: 700;
    color: #fff;
    font-feature-settings: 'tnum';
    white-space: nowrap;
}

.rt-calc-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 18px;
}

.rt-btn--block { width: 100%; justify-content: center; display: inline-flex; align-items: center; gap: 8px; }

.rt-calc-disclaimer {
    font-size: 11.5px;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.5);
    padding-top: 14px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* ==================== PRINT STYLE ==================== */
@media print {
    .rt-calc-hero,
    .rt-calc-form,
    .rt-calc-actions,
    .rt-footer,
    .rt-header { display: none !important; }
    .rt-calc-app { padding: 20px 0; background: #fff; }
    .rt-calc-app__grid { grid-template-columns: 1fr; }
    .rt-calc-result { position: static; }
    .rt-calc-result__inner {
        background: #fff !important;
        color: #000 !important;
        box-shadow: none;
        border: 1px solid #000;
    }
    .rt-calc-result__inner::before { display: none; }
    .rt-calc-result__amount {
        background: none;
        -webkit-text-fill-color: initial;
        color: #000;
    }
    .rt-calc-breakdown li,
    .rt-calc-result__per-ton,
    .rt-calc-result__duration,
    .rt-calc-disclaimer { color: #000 !important; }
    .rt-calc-breakdown li b { color: #000; }
    .rt-calc-result__eyebrow {
        background: #000; color: #fff;
    }
}