/* ============================================================
   SHUM-KVARTIRA.CSS — страница «Шумоизоляция квартиры»
   (потолок / стены / пол, системы TechnoSonus и SoundGuard)

   Подключается ПОСЛЕ styles.css и shum-steny.css, ДО theme-light.css.
   Цвета заданы явно (страница живёт в светлой теме), поэтому
   theme-light.css её не трогает и откат темы её не ломает.
   ============================================================ */

.kv {
    --kv-ink:      #14232f;
    --kv-ink-2:    #33475b;
    --kv-mute:     #64798e;
    --kv-dim:      #8fa3b6;
    --kv-line:     rgba(26, 42, 58, 0.12);
    --kv-line-soft:rgba(26, 42, 58, 0.07);
    --kv-paper:    #ffffff;
    --kv-soft:     #f1f4f8;

    /* три поверхности — три опознавательных цвета, дальше по всей странице */
    --kv-ceil:     #2f5d93;
    --kv-ceil-bg:  #e9f0f9;
    --kv-wall:     #1a6fc4;
    --kv-wall-bg:  #e6f1fc;
    --kv-floor:    #b9761a;
    --kv-floor-bg: #fbf1e2;
}

/* активная поверхность прокрашивает секцию целиком */
.kv[data-surface="ceiling"] { --kv-acc: var(--kv-ceil); --kv-acc-bg: var(--kv-ceil-bg); }
.kv[data-surface="wall"]    { --kv-acc: var(--kv-wall); --kv-acc-bg: var(--kv-wall-bg); }
.kv[data-surface="floor"]   { --kv-acc: var(--kv-floor); --kv-acc-bg: var(--kv-floor-bg); }

.kv-num { font-variant-numeric: tabular-nums; }


/* ============================================================
   HERO — полоса ключевых цифр под общим .page-hero
   ============================================================ */
.kv-hero__facts {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1px;
    margin-top: 40px;
    background: var(--kv-line);
    border: 1px solid var(--kv-line);
    border-radius: 10px;
    overflow: hidden;
}
.kv-hero__fact {
    background: rgba(255, 255, 255, 0.62);
    padding: 16px 18px;
}
.kv-hero__fact b {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(20px, 2.4vw, 27px);
    font-weight: 700;
    line-height: 1.1;
    color: var(--clr-text);
    font-variant-numeric: tabular-nums;
}
.kv-hero__fact span {
    display: block;
    margin-top: 5px;
    font-size: 12px;
    line-height: 1.45;
    color: var(--clr-text-muted);
}


/* ============================================================
   РАЗРЕЗ КВАРТИРЫ — три соседа, три поверхности
   ============================================================ */
.kv-cut { background: var(--kv-paper); }

.kv-cut__layout {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: center;
}

/* — сам разрез — */
.kv-cutaway {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 56px 118px;
    grid-template-rows: auto auto minmax(120px, 1fr) auto auto;
    border: 1px solid var(--kv-line);
    border-radius: 12px;
    overflow: hidden;
    background: var(--kv-soft);
    isolation: isolate;
}

.kv-cutaway__nb {
    position: relative;
    padding: 14px 16px 16px;
    background: #e7ebf0;
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-height: 84px;
}
.kv-cutaway__nb--top    { grid-column: 1 / 2; grid-row: 1; }
.kv-cutaway__nb--bottom { grid-column: 1 / 2; grid-row: 5; }
.kv-cutaway__nb--side   { grid-column: 3; grid-row: 1 / -1; justify-content: center; }

.kv-cutaway__nb-title {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--kv-ink-2);
}
.kv-cutaway__nb-note {
    font-size: 11.5px;
    line-height: 1.4;
    color: var(--kv-mute);
    max-width: 26ch;
}

/* волны звука */
.kv-wave { position: absolute; pointer-events: none; opacity: 0.9; }
.kv-wave path {
    fill: none;
    stroke-width: 1.6;
    stroke-linecap: round;
    animation: kv-wave-pulse 2.6s ease-out infinite;
}
.kv-wave path:nth-child(2) { animation-delay: 0.35s; }
.kv-wave path:nth-child(3) { animation-delay: 0.7s; }

.kv-wave--top    { right: 20px; bottom: -2px; stroke: var(--kv-ceil); }
.kv-wave--top path    { stroke: var(--kv-ceil); }
.kv-wave--bottom { right: 20px; top: -2px; transform: rotate(180deg); }
.kv-wave--bottom path { stroke: var(--kv-floor); }
.kv-wave--side   { left: -4px; top: 50%; transform: translateY(-50%) rotate(90deg); }
.kv-wave--side path   { stroke: var(--kv-wall); }

@keyframes kv-wave-pulse {
    0%   { opacity: 0; transform: scale(0.72); }
    28%  { opacity: 1; }
    100% { opacity: 0; transform: scale(1.15); }
}

/* поверхности-кнопки */
.kv-surface {
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
    border: 0;
    margin: 0;
    padding: 12px 16px;
    font: inherit;
    text-align: left;
    cursor: pointer;
    background: var(--s-bg, #dfe6ee);
    color: var(--kv-ink);
    transition: background 0.25s ease, box-shadow 0.25s ease;
}
.kv-surface--ceiling { grid-column: 1 / 2; grid-row: 2; --s-bg: var(--kv-ceil-bg);  --s: var(--kv-ceil);  }
.kv-surface--floor   { grid-column: 1 / 2; grid-row: 4; --s-bg: var(--kv-floor-bg); --s: var(--kv-floor); }
.kv-surface--wall    {
    grid-column: 2; grid-row: 1 / -1;
    --s-bg: var(--kv-wall-bg); --s: var(--kv-wall);
    flex-direction: column;
    justify-content: center;
    padding: 16px 6px;
}

.kv-surface::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--s);
    opacity: 0;
    transition: opacity 0.25s ease;
}
.kv-surface:hover::before,
.kv-surface.is-active::before { opacity: 0.14; }
.kv-surface:focus-visible {
    outline: none;
    box-shadow: inset 0 0 0 2px var(--s);
    z-index: 2;
}

.kv-surface__hatch {
    flex: 0 0 auto;
    width: 26px;
    height: 14px;
    border-radius: 2px;
    background:
        repeating-linear-gradient(-45deg, var(--s) 0 2px, transparent 2px 5px),
        color-mix(in srgb, var(--s) 14%, #fff);
    border: 1px solid color-mix(in srgb, var(--s) 45%, transparent);
}
.kv-surface--wall .kv-surface__hatch { width: 14px; height: 26px; }

.kv-surface__label {
    position: relative;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--s);
}
.kv-surface--wall .kv-surface__label {
    writing-mode: vertical-rl;
    text-orientation: mixed;
}
.kv-surface__gain {
    position: relative;
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 11.5px;
    font-weight: 600;
    color: var(--kv-mute);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}
.kv-surface--wall .kv-surface__gain { display: none; }

.kv-cutaway__room {
    grid-column: 1 / 2;
    grid-row: 3;
    background:
        linear-gradient(180deg, #ffffff 0%, #fbfcfe 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 22px 16px;
    text-align: center;
}
.kv-cutaway__room-title {
    font-family: var(--font-display);
    font-size: clamp(17px, 2.2vw, 22px);
    font-weight: 700;
    color: var(--kv-ink);
}
.kv-cutaway__room-note {
    font-size: 12px;
    color: var(--kv-mute);
    max-width: 30ch;
    line-height: 1.5;
}

.kv-cutaway__hint {
    display: flex;
    align-items: center;
    gap: 7px;
    margin-top: 12px;
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--kv-dim);
}
.kv-cutaway__hint::before {
    content: "";
    width: 22px;
    height: 1px;
    background: var(--kv-line);
}

/* — текстовая колонка рядом с разрезом — */
.kv-cut__lead {
    font-size: 16px;
    line-height: 1.72;
    color: var(--kv-ink-2);
    margin-bottom: 14px;
}
.kv-cut__lead strong { color: var(--kv-ink); font-weight: 700; }

.kv-noise {
    display: flex;
    flex-direction: column;
    gap: 1px;
    margin-top: 22px;
    background: var(--kv-line);
    border: 1px solid var(--kv-line);
    border-radius: 10px;
    overflow: hidden;
}
.kv-noise__item {
    background: var(--kv-paper);
    padding: 15px 18px;
    display: grid;
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 4px 18px;
    align-items: baseline;
}
.kv-noise__kind {
    font-size: 12.5px;
    font-weight: 800;
    color: var(--kv-ink);
    letter-spacing: -0.01em;
}
.kv-noise__src {
    font-size: 13px;
    line-height: 1.55;
    color: var(--kv-mute);
}
.kv-noise__fix {
    grid-column: 2;
    font-size: 12px;
    color: var(--kv-acc, var(--kv-ceil));
    font-weight: 600;
}


/* ============================================================
   КОНФИГУРАТОР СИСТЕМ
   ============================================================ */
.kv-sys { background: var(--kv-soft); }

/* сегментированный переключатель поверхности */
.kv-seg {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    background: var(--kv-line);
    border: 1px solid var(--kv-line);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 18px;
}
.kv-seg__btn {
    position: relative;
    border: 0;
    margin: 0;
    padding: 15px 16px 14px;
    font: inherit;
    text-align: left;
    background: var(--kv-paper);
    color: var(--kv-mute);
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
}
.kv-seg__btn::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: 0;
    height: 3px;
    background: var(--s, var(--kv-ceil));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.32s cubic-bezier(.2,.7,.3,1);
}
.kv-seg__btn[data-surface="ceiling"] { --s: var(--kv-ceil); }
.kv-seg__btn[data-surface="wall"]    { --s: var(--kv-wall); }
.kv-seg__btn[data-surface="floor"]   { --s: var(--kv-floor); }
.kv-seg__btn:hover { background: #fafbfd; color: var(--kv-ink); }
.kv-seg__btn.is-active { color: var(--kv-ink); background: var(--kv-paper); }
.kv-seg__btn.is-active::after { transform: scaleX(1); }
.kv-seg__btn:focus-visible { outline: 2px solid var(--s); outline-offset: -2px; }

.kv-seg__name {
    display: block;
    font-family: var(--font-display);
    font-size: 19px;
    font-weight: 700;
    line-height: 1.15;
}
.kv-seg__meta {
    display: block;
    margin-top: 4px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.03em;
    color: var(--kv-dim);
    font-variant-numeric: tabular-nums;
}
.kv-seg__btn.is-active .kv-seg__meta { color: var(--s); }

/* фильтр по бренду */
.kv-filter {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}
.kv-filter__label {
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--kv-dim);
    margin-right: 4px;
}
.kv-chip {
    border: 1px solid var(--kv-line);
    background: var(--kv-paper);
    color: var(--kv-mute);
    border-radius: 999px;
    padding: 7px 15px;
    font: inherit;
    font-size: 12.5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}
.kv-chip:hover { border-color: var(--kv-acc, var(--kv-ceil)); color: var(--kv-ink); }
.kv-chip.is-active {
    background: var(--kv-acc, var(--kv-ceil));
    border-color: var(--kv-acc, var(--kv-ceil));
    color: #fff;
}
.kv-chip:focus-visible { outline: 2px solid var(--kv-acc, var(--kv-ceil)); outline-offset: 2px; }

/* сетка карточек */
.kv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(305px, 1fr));
    gap: 18px;
}
.kv-card[hidden] { display: none; }

.kv-card {
    display: flex;
    flex-direction: column;
    background: var(--kv-paper);
    border: 1px solid var(--kv-line);
    border-radius: 12px;
    padding: 20px 20px 18px;
    position: relative;
    transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
    animation: kv-card-in 0.42s cubic-bezier(.2,.7,.3,1) both;
}
@keyframes kv-card-in {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: none; }
}
.kv-card:hover {
    border-color: color-mix(in srgb, var(--c) 55%, transparent);
    box-shadow: 0 10px 30px rgba(26, 60, 100, 0.10);
    transform: translateY(-2px);
}
.kv-card[data-surface="ceiling"] { --c: var(--kv-ceil); }
.kv-card[data-surface="wall"]    { --c: var(--kv-wall); }
.kv-card[data-surface="floor"]   { --c: var(--kv-floor); }

.kv-card--pick { border-color: var(--c); box-shadow: 0 8px 26px rgba(26, 60, 100, 0.10); }
.kv-card__pick {
    position: absolute;
    top: -1px; right: 16px;
    transform: translateY(-50%);
    background: var(--c);
    color: #fff;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 999px;
}

.kv-card__top {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}
.kv-brand {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 4px 8px;
    border-radius: 3px;
}
.kv-brand--ts { background: #e8eef7; color: #2f5d93; }
.kv-brand--sg { background: #e7f2ec; color: #23764a; }
.kv-card__type {
    margin-left: auto;
    font-size: 11px;
    font-weight: 600;
    color: var(--kv-dim);
}

.kv-card__name {
    font-family: var(--font-display);
    font-size: 23px;
    font-weight: 700;
    line-height: 1.15;
    color: var(--kv-ink);
    margin-bottom: 3px;
}
.kv-card__tag {
    font-size: 12.5px;
    line-height: 1.5;
    color: var(--kv-mute);
    margin-bottom: 15px;
}

.kv-card__metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    padding: 12px 0;
    border-top: 1px solid var(--kv-line-soft);
    border-bottom: 1px solid var(--kv-line-soft);
    margin-bottom: 14px;
}
.kv-metric span {
    display: block;
    font-size: 10px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--kv-dim);
    margin-bottom: 3px;
}
.kv-metric b {
    display: block;
    font-size: 15px;
    font-weight: 800;
    color: var(--kv-ink);
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.01em;
}
.kv-metric--hero b { color: var(--c); font-size: 17px; }

/* схема состава: пропорциональная полоса */
.kv-stack {
    display: flex;
    height: 26px;
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--kv-line-soft);
    margin-bottom: 9px;
}
.kv-stack__seg {
    position: relative;
    min-width: 6px;
    transform-origin: left;
    animation: kv-stack-in 0.55s cubic-bezier(.2,.7,.3,1) both;
}
.kv-stack__seg + .kv-stack__seg { border-left: 1px solid rgba(255,255,255,0.75); }
@keyframes kv-stack-in { from { transform: scaleX(0); } to { transform: scaleX(1); } }

.kv-stack__seg--gkl   { background: #dfe5ec; }
.kv-stack__seg--panel { background: #b9cde6; }
.kv-stack__seg--wool  { background: #f3e2b4; }
.kv-stack__seg--memb  { background: #bfded6; }
.kv-stack__seg--frame { background: repeating-linear-gradient(90deg, #cfd8e2 0 3px, #e6ebf1 3px 6px); }
.kv-stack__seg--screed{ background: #d8d2c8; }
.kv-stack__seg--base  { background: repeating-linear-gradient(-45deg, #c3ccd6 0 3px, #d9e0e7 3px 7px); }

.kv-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 12px;
    margin-bottom: 16px;
}
.kv-legend li {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    color: var(--kv-mute);
}
.kv-legend i {
    width: 9px; height: 9px;
    border-radius: 2px;
    flex: 0 0 auto;
}

.kv-card__foot {
    margin-top: auto;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 12px;
    padding-top: 14px;
    border-top: 1px solid var(--kv-line-soft);
}
.kv-card__price small {
    display: block;
    font-size: 10px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--kv-dim);
    margin-bottom: 2px;
}
.kv-card__price b {
    font-size: 19px;
    font-weight: 800;
    color: var(--kv-ink);
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.02em;
}
.kv-card__btn {
    border: 1px solid color-mix(in srgb, var(--c) 40%, transparent);
    background: color-mix(in srgb, var(--c) 8%, #fff);
    color: var(--c);
    border-radius: 4px;
    padding: 9px 15px;
    font: inherit;
    font-size: 12.5px;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.2s ease, color 0.2s ease;
}
.kv-card__btn:hover { background: var(--c); color: #fff; }
.kv-card__btn:focus-visible { outline: 2px solid var(--c); outline-offset: 2px; }

.kv-sys__note {
    margin-top: 22px;
    font-size: 12.5px;
    line-height: 1.65;
    color: var(--kv-mute);
    max-width: 90ch;
}
.kv-sys__note a { color: var(--kv-ceil); text-decoration: underline; text-underline-offset: 2px; }


/* ============================================================
   КАЛЬКУЛЯТОР
   ============================================================ */
.kv-calc { background: var(--kv-paper); }

.kv-calc__box {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    border: 1px solid var(--kv-line);
    border-radius: 14px;
    overflow: hidden;
}

.kv-calc__inputs { padding: clamp(22px, 3vw, 34px); }

.kv-calc__level {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    background: var(--kv-line);
    border: 1px solid var(--kv-line);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 22px;
}
.kv-calc__level button {
    border: 0; margin: 0; padding: 11px 10px;
    font: inherit; font-size: 13px; font-weight: 700;
    background: var(--kv-paper);
    color: var(--kv-mute);
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}
.kv-calc__level button small {
    display: block;
    font-size: 10.5px;
    font-weight: 500;
    color: var(--kv-dim);
    margin-top: 2px;
}
.kv-calc__level button:hover { background: #f7f9fc; color: var(--kv-ink); }
.kv-calc__level button.is-active { background: var(--kv-ceil); color: #fff; }
.kv-calc__level button.is-active small { color: rgba(255,255,255,0.75); }

.kv-field {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 116px;
    align-items: center;
    gap: 14px;
    padding: 13px 0;
    border-bottom: 1px solid var(--kv-line-soft);
}
.kv-field:last-of-type { border-bottom: 0; }
.kv-field__label {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 14px;
    font-weight: 600;
    color: var(--kv-ink);
}
.kv-field__label i {
    width: 10px; height: 10px; border-radius: 2px; flex: 0 0 auto;
}
.kv-field__label small {
    display: block;
    font-size: 11.5px;
    font-weight: 400;
    color: var(--kv-dim);
}
.kv-field__input {
    display: flex;
    align-items: center;
    border: 1.5px solid #dde3ec;
    border-radius: 8px;
    background: #fcfdff;
    transition: border-color 0.2s;
}
.kv-field__input:focus-within { border-color: var(--kv-ceil); background: #fff; }
.kv-field__input input {
    width: 100%;
    min-width: 0;
    border: 0;
    background: none;
    outline: none;
    padding: 10px 0 10px 12px;
    font: inherit;
    font-size: 15px;
    font-weight: 700;
    color: var(--kv-ink);
    font-variant-numeric: tabular-nums;
    -moz-appearance: textfield;
}
.kv-field__input input::-webkit-outer-spin-button,
.kv-field__input input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.kv-field__input span {
    padding: 0 12px 0 4px;
    font-size: 12px;
    color: var(--kv-dim);
    white-space: nowrap;
}

.kv-calc__result {
    background: linear-gradient(160deg, #1a2a3a 0%, #12233a 55%, #17314e 100%);
    color: #fff;
    padding: clamp(22px, 3vw, 34px);
    display: flex;
    flex-direction: column;
}
.kv-calc__result-label {
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.5);
    margin-bottom: 14px;
}
.kv-calc__total {
    font-family: var(--font-display);
    font-size: clamp(30px, 4.4vw, 44px);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.02em;
    font-variant-numeric: tabular-nums;
}
.kv-calc__total-unit { font-size: 0.5em; color: rgba(255,255,255,0.6); margin-left: 6px; }
.kv-calc__sub {
    margin-top: 4px;
    font-size: 12.5px;
    color: rgba(255,255,255,0.6);
}

.kv-calc__rows {
    margin: 20px 0 18px;
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: rgba(255,255,255,0.10);
    border-radius: 8px;
    overflow: hidden;
}
.kv-calc__row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 12px;
    padding: 10px 13px;
    background: rgba(255,255,255,0.045);
    font-size: 13px;
}
.kv-calc__row span { color: rgba(255,255,255,0.68); }
.kv-calc__row b { font-weight: 700; font-variant-numeric: tabular-nums; }
.kv-calc__row--muted b { color: rgba(255,255,255,0.72); font-weight: 600; }

.kv-calc__note {
    font-size: 11.5px;
    line-height: 1.6;
    color: rgba(255,255,255,0.5);
    margin-top: auto;
    padding-top: 14px;
}
.kv-calc__result .btn { margin-top: 16px; }


/* ============================================================
   ЭТАПЫ
   ============================================================ */
.kv-steps { background: var(--kv-soft); }

.kv-steps__list {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 1px;
    background: var(--kv-line);
    border: 1px solid var(--kv-line);
    border-radius: 12px;
    overflow: hidden;
    counter-reset: kvstep;
}
.kv-step {
    background: var(--kv-paper);
    padding: 22px 20px 24px;
    position: relative;
}
.kv-step__n {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--kv-ceil);
    display: block;
    margin-bottom: 12px;
}
.kv-step h3 {
    font-size: 15px;
    font-weight: 700;
    color: var(--kv-ink);
    line-height: 1.3;
    margin-bottom: 7px;
}
.kv-step p {
    font-size: 12.5px;
    line-height: 1.6;
    color: var(--kv-mute);
}
.kv-step__when {
    display: inline-block;
    margin-top: 11px;
    font-family: var(--font-mono);
    font-size: 10.5px;
    color: var(--kv-dim);
}


/* ============================================================
   FAQ
   ============================================================ */
.kv-faq { background: var(--kv-soft); }
.kv-faq__list {
    max-width: 900px;
    margin: 0 auto;
    background: var(--kv-line);
    border: 1px solid var(--kv-line);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 1px;
}
.kv-faq__item { background: var(--kv-paper); }
.kv-faq__q {
    width: 100%;
    display: flex;
    align-items: flex-start;
    gap: 14px;
    border: 0;
    margin: 0;
    padding: 18px 22px;
    background: none;
    font: inherit;
    font-size: 15.5px;
    font-weight: 700;
    color: var(--kv-ink);
    text-align: left;
    cursor: pointer;
    transition: background 0.2s;
}
.kv-faq__q:hover { background: #fafbfd; }
.kv-faq__q:focus-visible { outline: 2px solid var(--kv-ceil); outline-offset: -2px; }
.kv-faq__q::after {
    content: "";
    flex: 0 0 auto;
    margin-left: auto;
    width: 11px; height: 11px;
    margin-top: 6px;
    border-right: 2px solid var(--kv-dim);
    border-bottom: 2px solid var(--kv-dim);
    transform: rotate(45deg);
    transition: transform 0.3s cubic-bezier(.2,.7,.3,1), border-color 0.2s;
}
.kv-faq__q[aria-expanded="true"]::after {
    transform: rotate(-135deg);
    border-color: var(--kv-ceil);
}
.kv-faq__a {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.32s cubic-bezier(.2,.7,.3,1);
}
.kv-faq__a > div { overflow: hidden; }
.kv-faq__item.is-open .kv-faq__a { grid-template-rows: 1fr; }
.kv-faq__a p {
    padding: 0 22px 20px;
    font-size: 14px;
    line-height: 1.72;
    color: var(--kv-ink-2);
    max-width: 78ch;
}
.kv-faq__a p + p { padding-top: 10px; }
.kv-faq__a strong { color: var(--kv-ink); }


/* ============================================================
   АДАПТИВ
   ============================================================ */
@media (max-width: 1040px) {
    .kv-cut__layout { grid-template-columns: minmax(0, 1fr); }
    .kv-calc__box { grid-template-columns: minmax(0, 1fr); }
    .kv-steps__list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
    .kv-hero__facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .kv-seg { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 640px) {
    .kv-cutaway {
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: none;
    }
    .kv-cutaway__nb--top    { grid-column: 1; grid-row: 1; }
    .kv-surface--ceiling    { grid-column: 1; grid-row: 2; }
    .kv-cutaway__room       { grid-column: 1; grid-row: 3; }
    .kv-surface--floor      { grid-column: 1; grid-row: 4; }
    .kv-cutaway__nb--bottom { grid-column: 1; grid-row: 5; }
    .kv-surface--wall {
        grid-column: 1; grid-row: 6;
        flex-direction: row;
        padding: 12px 16px;
    }
    .kv-surface--wall .kv-surface__hatch { width: 26px; height: 14px; }
    .kv-surface--wall .kv-surface__label { writing-mode: horizontal-tb; }
    .kv-surface--wall .kv-surface__gain { display: block; }
    .kv-cutaway__nb--side { grid-column: 1; grid-row: 7; }
    .kv-wave--side { left: auto; right: 20px; top: -2px; transform: rotate(180deg); }

    .kv-noise__item { grid-template-columns: minmax(0, 1fr); }
    .kv-noise__fix  { grid-column: 1; }

    .kv-steps__list { grid-template-columns: minmax(0, 1fr); }
    .kv-field { grid-template-columns: minmax(0, 1fr) 104px; gap: 10px; }
    .kv-grid { grid-template-columns: minmax(0, 1fr); }
    .kv-card__foot { flex-direction: column; align-items: stretch; }
    .kv-card__btn { width: 100%; }
    .kv-faq__q { font-size: 14.5px; padding: 16px 18px; }
    .kv-faq__a p { padding: 0 18px 18px; }
}

@media (prefers-reduced-motion: reduce) {
    .kv-wave path,
    .kv-card,
    .kv-stack__seg { animation: none !important; }
    .kv-faq__a { transition: none; }
}


/* ============================================================
   ДОБАВКИ: легенда состава, пустой фильтр, экран «отправлено»
   ============================================================ */
.kv-legend .sw-base   { background: repeating-linear-gradient(-45deg, #c3ccd6 0 2px, #d9e0e7 2px 5px); }
.kv-legend .sw-frame  { background: repeating-linear-gradient(90deg, #cfd8e2 0 2px, #e6ebf1 2px 4px); }
.kv-legend .sw-wool   { background: #f3e2b4; }
.kv-legend .sw-panel  { background: #b9cde6; }
.kv-legend .sw-memb   { background: #bfded6; }
.kv-legend .sw-gkl    { background: #dfe5ec; }
.kv-legend .sw-screed { background: #d8d2c8; }

.kv-empty {
    margin-top: 26px;
    padding: 26px;
    text-align: center;
    font-size: 14px;
    color: var(--kv-mute);
    background: var(--kv-paper);
    border: 1px dashed var(--kv-line);
    border-radius: 12px;
}
.kv-empty[hidden] { display: none; }

/* экран успешной отправки — в потоке, а не абсолютом поверх схлопнувшейся формы */
.kv .request__form-wrapper { position: relative; }
.kv .form-success {
    position: static;
    inset: auto;
    background: #fff;
    border-radius: 20px;
    padding: 44px 32px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.15);
}


/* ============================================================
   HERO — две колонки: оффер + карточка быстрой заявки
   ============================================================ */
.kv-hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 384px);
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
}

.kv-lead {
    position: relative;
    background: var(--kv-paper);
    border: 1px solid var(--kv-line);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 18px 50px rgba(20, 48, 82, 0.16);
}
.kv-lead__shot {
    position: relative;
    aspect-ratio: 16 / 10;
    background: #e7ebf0;
}
.kv-lead__shot img { width: 100%; height: 100%; object-fit: cover; display: block; }
.kv-lead__shot figcaption {
    position: absolute;
    left: 0; right: 0; bottom: 0;
    padding: 22px 16px 11px;
    background: linear-gradient(to top, rgba(12, 26, 42, 0.86), transparent);
    color: #fff;
    font-size: 11.5px;
    font-weight: 600;
    letter-spacing: 0.02em;
}
.kv-lead__body { padding: 20px 20px 22px; }
.kv-lead__title {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--kv-ink);
    margin-bottom: 5px;
}
.kv-lead__sub {
    font-size: 12.5px;
    line-height: 1.55;
    color: var(--kv-mute);
    margin-bottom: 15px;
}
.kv-lead .form-group { margin-bottom: 11px; }
.kv-lead .form-input { padding: 11px 13px; font-size: 14px; }
.kv-lead__legal {
    margin-top: 11px;
    font-size: 10.5px;
    line-height: 1.5;
    color: var(--kv-dim);
}
.kv-lead__legal a { color: var(--kv-ceil); text-decoration: underline; text-underline-offset: 2px; }
.kv-lead__done {
    display: none;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 8px;
    padding: 34px 22px 38px;
}
.kv-lead__done h4 { font-size: 17px; font-weight: 700; color: var(--kv-ink); }
.kv-lead__done p  { font-size: 13px; color: var(--kv-mute); line-height: 1.6; }


/* ============================================================
   «КАК УСТРОЕНА СИСТЕМА» — рендеры конструкций в разрезе
   ============================================================ */
.kv-shots { background: var(--kv-paper); }
.kv-shots__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}
.kv-shot {
    border: 1px solid var(--kv-line);
    border-radius: 12px;
    overflow: hidden;
    background: var(--kv-paper);
    display: flex;
    flex-direction: column;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    border-top: 3px solid var(--c, var(--kv-ceil));
}
.kv-shot:hover { transform: translateY(-3px); box-shadow: 0 14px 36px rgba(26, 60, 100, 0.12); }
.kv-shot__img { position: relative; aspect-ratio: 1 / 1; background: #eceff3; overflow: hidden; }
.kv-shot__img img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s cubic-bezier(.2,.7,.3,1);
}
.kv-shot:hover .kv-shot__img img { transform: scale(1.035); }
.kv-shot__tag {
    position: absolute;
    top: 12px; left: 12px;
    background: rgba(255,255,255,0.94);
    color: var(--c, var(--kv-ceil));
    font-size: 10.5px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 5px 10px;
    border-radius: 3px;
}
.kv-shot__body { padding: 18px 20px 20px; display: flex; flex-direction: column; flex: 1; }
.kv-shot__body h3 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: var(--kv-ink);
    margin-bottom: 8px;
}
.kv-shot__body p { font-size: 13px; line-height: 1.62; color: var(--kv-mute); margin-bottom: 13px; }
.kv-shot__layers { display: flex; flex-direction: column; gap: 5px; margin-bottom: 15px; }
.kv-shot__layers li {
    list-style: none;
    display: flex;
    align-items: baseline;
    gap: 8px;
    font-size: 12px;
    color: var(--kv-ink-2);
}
.kv-shot__layers li::before {
    content: "";
    flex: 0 0 auto;
    width: 5px; height: 5px;
    border-radius: 50%;
    background: var(--c, var(--kv-ceil));
    transform: translateY(-2px);
}
.kv-shot__more {
    margin-top: auto;
    font-size: 12.5px;
    font-weight: 700;
    color: var(--c, var(--kv-ceil));
}
.kv-shots__note {
    margin-top: 22px;
    font-size: 12.5px;
    line-height: 1.65;
    color: var(--kv-mute);
}


/* ============================================================
   ЧТО ВХОДИТ В ЦЕНУ / ДОВЕРИЕ
   ============================================================ */
.kv-trust { background: var(--kv-paper); }
.kv-trust__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    background: var(--kv-line);
    border: 1px solid var(--kv-line);
    border-radius: 12px;
    overflow: hidden;
}
.kv-trust__item {
    background: var(--kv-paper);
    padding: 24px 22px 26px;
}
.kv-trust__item svg { color: var(--kv-ceil); margin-bottom: 13px; display: block; }
.kv-trust__item h3 {
    font-size: 15.5px;
    font-weight: 700;
    color: var(--kv-ink);
    margin-bottom: 7px;
}
.kv-trust__item p { font-size: 13px; line-height: 1.62; color: var(--kv-mute); }


/* ============================================================
   ОТЗЫВЫ
   ============================================================ */
.kv-rev { background: var(--kv-soft); }
.kv-rev__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}
.kv-rev__card {
    background: var(--kv-paper);
    border: 1px solid var(--kv-line);
    border-radius: 12px;
    padding: 24px 22px 22px;
    display: flex;
    flex-direction: column;
}
.kv-rev__stars { color: #d99a2b; font-size: 14px; letter-spacing: 2px; margin-bottom: 12px; }
.kv-rev__text {
    font-size: 13.5px;
    line-height: 1.68;
    color: var(--kv-ink-2);
    margin-bottom: 18px;
    flex: 1;
}
.kv-rev__who { display: flex; align-items: center; gap: 11px; }
.kv-rev__ava {
    width: 40px; height: 40px;
    border-radius: 50%;
    overflow: hidden;
    flex: 0 0 auto;
    background: #dfe4ea;
}
.kv-rev__ava img { width: 100%; height: 100%; object-fit: cover; }
.kv-rev__name { font-size: 13.5px; font-weight: 700; color: var(--kv-ink); }
.kv-rev__meta { font-size: 11.5px; color: var(--kv-dim); margin-top: 1px; }


/* ============================================================
   ПОЛОСА-ПРИЗЫВ ПОСЕРЕДИНЕ
   ============================================================ */
.kv-band {
    background: linear-gradient(120deg, #1a2a3a 0%, #12233a 55%, #17314e 100%);
    color: #fff;
    padding: clamp(34px, 5vw, 56px) 0;
}
.kv-band__inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: clamp(22px, 4vw, 54px);
    align-items: center;
}
.kv-band__title {
    font-family: var(--font-display);
    font-size: clamp(22px, 2.8vw, 31px);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 8px;
}
.kv-band__text {
    font-size: 14.5px;
    line-height: 1.65;
    color: rgba(255,255,255,0.68);
    max-width: 62ch;
}
.kv-band__actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.kv-band__phone {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    font-size: 17px;
    font-weight: 700;
    color: #fff;
    white-space: nowrap;
}
.kv-band__phone:hover { color: #9fc4ee; }


/* ============================================================
   ЛИПКАЯ ПАНЕЛЬ ДЕЙСТВИЙ (мобильные)
   ============================================================ */
.kv-bar { display: none; }

@media (max-width: 768px) {
    .kv-bar {
        position: fixed;
        left: 0; right: 0; bottom: 0;
        z-index: 998;
        display: grid;
        grid-template-columns: 56px minmax(0, 1fr);
        gap: 10px;
        padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
        background: rgba(255, 255, 255, 0.94);
        backdrop-filter: blur(12px);
        border-top: 1px solid var(--kv-line);
        box-shadow: 0 -6px 24px rgba(20, 48, 82, 0.12);
        transform: translateY(110%);
        transition: transform 0.32s cubic-bezier(.2,.7,.3,1);
    }
    .kv-bar.is-on { transform: none; }
    .kv-bar__call {
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 6px;
        background: rgba(47, 93, 147, 0.10);
        color: var(--kv-ceil);
        border: 1px solid rgba(47, 93, 147, 0.25);
    }
    .kv-bar .btn { width: 100%; }
    /* круглая кнопка звонка на десктопе прячется — её заменяет панель */
    .floating-cta { display: none; }
    body { padding-bottom: 72px; }
}


/* ============================================================
   АДАПТИВ ДЛЯ НОВЫХ БЛОКОВ
   ============================================================ */
@media (max-width: 1040px) {
    .kv-hero__grid { grid-template-columns: minmax(0, 1fr); }
    .kv-lead { max-width: 480px; }
    .kv-shots__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .kv-trust__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .kv-rev__grid   { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .kv-band__inner { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 640px) {
    .kv-shots__grid { grid-template-columns: minmax(0, 1fr); }
    .kv-trust__grid { grid-template-columns: minmax(0, 1fr); }
    .kv-rev__grid   { grid-template-columns: minmax(0, 1fr); }
    .kv-lead { max-width: none; }
}

@media (prefers-reduced-motion: reduce) {
    .kv-shot__img img,
    .kv-bar { transition: none !important; }
}


/* ============================================================
   ФОТО СИСТЕМЫ В КАРТОЧКЕ
   ============================================================ */
.kv-card__shot {
    position: relative;
    margin: -20px -20px 14px;
    aspect-ratio: 5 / 4;
    overflow: hidden;
    border-radius: 11px 11px 0 0;
    background: #eceff3;
}
.kv-card__shot img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s cubic-bezier(.2,.7,.3,1);
}
.kv-card:hover .kv-card__shot img { transform: scale(1.045); }
.kv-card__shot figcaption {
    position: absolute;
    left: 0; right: 0; bottom: 0;
    padding: 26px 13px 8px;
    background: linear-gradient(to top, rgba(12, 26, 42, 0.72), transparent);
    color: rgba(255, 255, 255, 0.86);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.03em;
}
/* бейдж «чаще всего берут» переезжает на фото */
.kv-card--pick .kv-card__pick {
    top: 12px;
    right: 12px;
    transform: none;
    z-index: 2;
    box-shadow: 0 2px 10px rgba(12, 26, 42, 0.28);
}

@media (prefers-reduced-motion: reduce) {
    .kv-card__shot img { transition: none !important; }
}


/* ============================================================
   ПОРТФОЛИО РАБОТ — слайдер
   ============================================================ */
.kv-port { background: var(--kv-soft); }

.kv-port__bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    flex-wrap: wrap;
    margin-bottom: 22px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--kv-line);
}
.kv-port__filters { display: flex; gap: 8px; flex-wrap: wrap; }
.kv-port__chip {
    padding: 8px 16px;
    border-radius: 999px;
    border: 1px solid var(--kv-line);
    background: var(--kv-paper);
    color: var(--kv-mute);
    font: inherit;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: border-color 0.18s, color 0.18s, background 0.18s;
}
.kv-port__chip:hover { border-color: var(--kv-ceil); color: var(--kv-ceil); }
.kv-port__chip.is-active { background: var(--kv-ceil); border-color: var(--kv-ceil); color: #fff; }
.kv-port__count { font-size: 13px; color: var(--kv-mute); }
.kv-port__count b { color: var(--kv-ink); font-size: 15px; font-variant-numeric: tabular-nums; }


/* ── сам слайдер ───────────────────────────────────────────── */
.kv-slider {
    background: var(--kv-paper);
    border: 1px solid var(--kv-line);
    border-radius: 16px;
    overflow: hidden;
}

.kv-slide {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
}
.kv-slide[hidden] { display: none; }

.kv-slide__stage {
    position: relative;
    aspect-ratio: 4 / 3;
    background: #dfe4ea;
    overflow: hidden;
}
.kv-slide__stage img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    animation: kvShot 0.75s cubic-bezier(.16,.8,.3,1) both;
}
@keyframes kvShot {
    from { opacity: 0; transform: scale(1.06); }
    to   { opacity: 1; transform: none; }
}

.kv-slide__cat {
    position: absolute;
    top: 16px; left: 16px;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.94);
    color: var(--kv-ceil);
    font-size: 10.5px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    animation: kvUp 0.5s 0.12s cubic-bezier(.16,.8,.3,1) both;
}
.kv-slide__zoom {
    position: absolute;
    right: 16px; bottom: 16px;
    width: 40px; height: 40px;
    display: grid;
    place-items: center;
    border: 0;
    border-radius: 50%;
    background: rgba(12, 26, 42, 0.6);
    color: #fff;
    cursor: zoom-in;
    backdrop-filter: blur(4px);
    transition: background 0.2s, transform 0.2s;
}
.kv-slide__zoom:hover { background: rgba(12, 26, 42, 0.85); transform: scale(1.08); }

/* текстовая половина: заголовок → описание → материалы */
.kv-slide__panel {
    padding: clamp(24px, 3vw, 40px);
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.kv-slide__title {
    font-family: var(--font-display);
    font-size: clamp(21px, 2.4vw, 28px);
    font-weight: 700;
    line-height: 1.22;
    color: var(--kv-ink);
    text-wrap: balance;
    margin-bottom: 14px;
    animation: kvUp 0.5s 0.06s cubic-bezier(.16,.8,.3,1) both;
}
.kv-slide__desc {
    font-size: 14.5px;
    line-height: 1.72;
    color: var(--kv-mute);
    max-width: 46ch;
    animation: kvUp 0.5s 0.14s cubic-bezier(.16,.8,.3,1) both;
}
.kv-slide__tagsbox {
    margin-top: 24px;
    padding-top: 18px;
    border-top: 1px solid var(--kv-line);
    animation: kvUp 0.5s 0.22s cubic-bezier(.16,.8,.3,1) both;
}
.kv-slide__tagshead {
    display: block;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--kv-dim);
    margin-bottom: 10px;
}
.kv-slide__tags { display: flex; flex-wrap: wrap; gap: 7px; }
.kv-slide__tags li {
    list-style: none;
    padding: 5px 11px;
    border-radius: 6px;
    background: rgba(47, 93, 147, 0.08);
    color: var(--kv-ink-2);
    font-size: 12px;
    font-weight: 600;
}
@keyframes kvUp {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: none; }
}


/* ── нижняя панель: стрелки, счётчик, миниатюры ────────────── */
.kv-slider__bar {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 14px 18px;
    border-top: 1px solid var(--kv-line);
    background: var(--kv-soft);
}
.kv-slider__nav { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.kv-slider__arrow {
    width: 38px; height: 38px;
    display: grid;
    place-items: center;
    border: 1px solid var(--kv-line);
    border-radius: 50%;
    background: var(--kv-paper);
    color: var(--kv-ink-2);
    cursor: pointer;
    transition: border-color 0.18s, color 0.18s, background 0.18s;
}
.kv-slider__arrow:hover { border-color: var(--kv-ceil); color: var(--kv-ceil); background: #fff; }
.kv-slider__count {
    font-size: 13px;
    font-weight: 600;
    color: var(--kv-dim);
    font-variant-numeric: tabular-nums;
    min-width: 54px;
    text-align: center;
}
.kv-slider__count b { color: var(--kv-ink); font-size: 15px; font-weight: 800; }
.kv-slider__count i { font-style: normal; margin: 0 3px; opacity: .5; }

.kv-slider__thumbs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    scrollbar-width: none;
    padding: 2px;
    flex: 1 1 auto;
}
.kv-slider__thumbs::-webkit-scrollbar { display: none; }
.kv-thumb {
    flex: 0 0 auto;
    width: 56px; height: 56px;
    padding: 0;
    border: 0;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    background: #dfe4ea;
    opacity: .5;
    box-shadow: 0 0 0 0 var(--kv-ceil);
    transition: opacity 0.2s, box-shadow 0.2s, transform 0.2s;
}
.kv-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.kv-thumb:hover { opacity: .85; transform: translateY(-2px); }
.kv-thumb.is-active { opacity: 1; box-shadow: 0 0 0 2px var(--kv-ceil); }
.kv-thumb[hidden] { display: none; }

.kv-port__empty {
    padding: 40px 0;
    text-align: center;
    font-size: 14px;
    color: var(--kv-mute);
}

.kv-port__cta {
    margin-top: 28px;
    padding: 22px 26px;
    border-radius: 12px;
    border: 1px dashed var(--kv-line);
    background: var(--kv-paper);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}
.kv-port__cta p { font-size: 14.5px; line-height: 1.6; color: var(--kv-ink-2); max-width: 62ch; }


/* ── просмотр фото ─────────────────────────────────────────── */
.kv-lb {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: grid;
    grid-template-columns: 56px minmax(0, 1fr) 56px;
    align-items: center;
    gap: 8px;
    padding: 24px 12px;
    background: rgba(9, 18, 30, 0.93);
    backdrop-filter: blur(6px);
    animation: kvLbIn 0.2s both;
}
.kv-lb[hidden] { display: none; }
@keyframes kvLbIn { from { opacity: 0; } to { opacity: 1; } }

.kv-lb__box {
    justify-self: center;
    max-width: min(1100px, 100%);
    max-height: calc(100vh - 48px);
    display: flex;
    flex-direction: column;
    background: var(--kv-paper);
    border-radius: 12px;
    overflow: hidden;
}
.kv-lb__box img {
    width: 100%;
    max-height: calc(100vh - 220px);
    object-fit: contain;
    background: #0d1a29;
    display: block;
}
.kv-lb__cap { padding: 16px 22px 20px; }
.kv-lb__cap h3 {
    font-family: var(--font-display);
    font-size: 19px;
    font-weight: 700;
    color: var(--kv-ink);
    margin-bottom: 6px;
}
.kv-lb__cap p { font-size: 13.5px; line-height: 1.65; color: var(--kv-mute); }

.kv-lb__close,
.kv-lb__nav {
    display: grid;
    place-items: center;
    width: 44px; height: 44px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.22);
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    cursor: pointer;
    transition: background 0.18s, border-color 0.18s;
}
.kv-lb__close:hover,
.kv-lb__nav:hover { background: rgba(255, 255, 255, 0.18); border-color: rgba(255, 255, 255, 0.4); }
.kv-lb__close { position: absolute; top: 18px; right: 18px; z-index: 2; }
.kv-lb__nav--prev { grid-column: 1; justify-self: center; }
.kv-lb__nav--next { grid-column: 3; justify-self: center; }

body.kv-lb-open { overflow: hidden; }


/* ── адаптив портфолио ─────────────────────────────────────── */
@media (max-width: 900px) {
    /* фото над текстом: на узком экране колонки съедают и то, и другое */
    .kv-slide { grid-template-columns: minmax(0, 1fr); }
    .kv-slide__stage { aspect-ratio: 16 / 10; }
    .kv-slide__panel { padding: 22px 20px 26px; }
    .kv-slide__desc { max-width: none; }
}
@media (max-width: 640px) {
    .kv-slider__bar { flex-wrap: wrap; gap: 12px; padding: 12px 14px; }
    .kv-slider__nav { order: 2; width: 100%; justify-content: center; }
    .kv-slider__thumbs { order: 1; width: 100%; }
    .kv-thumb { width: 48px; height: 48px; }
    .kv-port__bar { flex-direction: column; align-items: flex-start; gap: 12px; }
    .kv-port__filters { width: 100%; overflow-x: auto; padding-bottom: 2px; flex-wrap: nowrap; }
    .kv-port__cta { flex-direction: column; align-items: flex-start; }
    .kv-port__cta .btn { width: 100%; }
    .kv-lb { grid-template-columns: minmax(0, 1fr); padding: 60px 10px 14px; }
    .kv-lb__nav { position: fixed; bottom: 18px; z-index: 2; }
    .kv-lb__nav--prev { left: 24%; }
    .kv-lb__nav--next { right: 24%; }
    .kv-lb__box img { max-height: 52vh; }
}

@media (prefers-reduced-motion: reduce) {
    .kv-slide__stage img,
    .kv-slide__cat,
    .kv-slide__title,
    .kv-slide__desc,
    .kv-slide__tagsbox,
    .kv-thumb,
    .kv-slide__zoom,
    .kv-lb { animation: none !important; transition: none !important; }
}

.kv-slider:focus-visible { outline: 3px solid var(--kv-ceil); outline-offset: 3px; }


/* ============================================================
   SEO-БЛОКИ: ситуации клиента, материалы, помещения, перелинковка
   Разметка есть только на shumoizolyaciya-kvartiry.html —
   на страницах конструкций эти правила ни на что не влияют.
   ============================================================ */

/* ── Ситуации: «что именно вас беспокоит» ────────────────── */
.kv-task { background: var(--kv-paper); }

.kv-task__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(0, 380px));
    justify-content: center;
    gap: 18px;
}

.kv-task__card {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 26px 26px 22px;
    background: var(--kv-soft);
    border: 1px solid var(--kv-line);
    border-radius: 16px;
    transition: border-color .25s, box-shadow .25s, transform .25s;
}
.kv-task__card:hover {
    border-color: rgba(47, 93, 147, 0.35);
    box-shadow: 0 14px 34px rgba(20, 35, 47, 0.09);
    transform: translateY(-3px);
}

.kv-task__q {
    margin: 0;
    font-size: 1.12rem;
    line-height: 1.35;
    font-weight: 700;
    color: var(--kv-ink);
    text-wrap: balance;
}

.kv-task__a {
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.65;
    color: var(--kv-ink-2);
}

.kv-task__fix {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px;
    margin: 0;
    padding-top: 14px;
    border-top: 1px solid var(--kv-line-soft);
    font-size: 0.92rem;
    line-height: 1.5;
    font-weight: 600;
    color: var(--kv-ink);
}
.kv-task__tag {
    padding: 3px 9px;
    border-radius: 999px;
    background: var(--kv-ceil-bg);
    color: var(--kv-ceil);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    white-space: nowrap;
}

.kv-task__go {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: auto;
    padding: 0;
    background: none;
    border: 0;
    color: var(--kv-ceil);
    font: inherit;
    font-size: 0.92rem;
    font-weight: 700;
    cursor: pointer;
    text-align: left;
}
.kv-task__go svg { transition: transform .25s; }
.kv-task__go:hover svg { transform: translateX(4px); }
.kv-task__go:focus-visible { outline: 2px solid var(--kv-ceil); outline-offset: 3px; border-radius: 4px; }

/* ── Материалы и бренды ──────────────────────────────────── */
.kv-mat { background: var(--kv-soft); border-bottom: 1px solid var(--kv-line); }

.kv-mat__cols {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(0, 460px));
    justify-content: center;
    gap: 18px;
}

.kv-mat__col {
    padding: 26px 28px 22px;
    background: var(--kv-paper);
    border: 1px solid var(--kv-line);
    border-radius: 16px;
}

.kv-mat__brand {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding-bottom: 16px;
    margin-bottom: 4px;
    border-bottom: 2px solid var(--kv-ceil);
}
.kv-mat__brand h3 {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.01em;
    color: var(--kv-ink);
}
.kv-mat__brand span {
    font-size: 0.8rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--kv-mute);
}

.kv-mat__list { list-style: none; margin: 0; padding: 0; }

.kv-mat__item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 16px 0;
    border-bottom: 1px solid var(--kv-line-soft);
}
.kv-mat__item:last-child { border-bottom: 0; padding-bottom: 4px; }

.kv-mat__name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--kv-ink);
}
.kv-mat__role {
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--kv-ink-2);
}

.kv-mat__note {
    max-width: 900px;
    margin: 22px auto 0;
    padding: 16px 20px;
    background: var(--kv-paper);
    border: 1px solid var(--kv-line);
    border-radius: 12px;
    font-size: 0.93rem;
    line-height: 1.65;
    color: var(--kv-ink-2);
    text-align: center;
}

/* ── Типы помещений ──────────────────────────────────────── */
/* следом идут отзывы на том же тоне — отделяем волоском */
.kv-rooms { background: var(--kv-paper); border-top: 1px solid var(--kv-line); }

.kv-rooms__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(0, 340px));
    justify-content: center;
    gap: 16px;
}

.kv-room {
    padding: 24px 24px 22px;
    background: var(--kv-soft);
    border: 1px solid var(--kv-line);
    border-radius: 14px;
    border-left: 3px solid var(--kv-ceil);
}

.kv-room__h {
    margin: 0 0 8px;
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.35;
    color: var(--kv-ink);
    text-wrap: balance;
}
.kv-room__p {
    margin: 0;
    font-size: 0.93rem;
    line-height: 1.65;
    color: var(--kv-ink-2);
}

/* ── Перелинковка на страницы конструкций ────────────────── */
.kv-more { background: var(--kv-paper); }

.kv-more__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(0, 360px));
    justify-content: center;
    gap: 18px;
}

.kv-more__card {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 26px 26px 22px;
    background: var(--kv-soft);
    border: 1px solid var(--kv-line);
    border-radius: 16px;
    text-decoration: none;
    transition: border-color .25s, box-shadow .25s, transform .25s, background .25s;
}
.kv-more__card:hover {
    background: var(--kv-paper);
    border-color: rgba(47, 93, 147, 0.4);
    box-shadow: 0 14px 34px rgba(20, 35, 47, 0.1);
    transform: translateY(-3px);
}

.kv-more__t {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--kv-ink);
}
.kv-more__d {
    font-size: 0.93rem;
    line-height: 1.65;
    color: var(--kv-ink-2);
}
.kv-more__meta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: auto;
    padding-top: 14px;
    border-top: 1px solid var(--kv-line-soft);
    font-size: 0.88rem;
    font-weight: 700;
    letter-spacing: 0.01em;
    color: var(--kv-ceil);
    font-variant-numeric: tabular-nums;
}
.kv-more__meta svg { transition: transform .25s; }
.kv-more__card:hover .kv-more__meta svg { transform: translateX(4px); }

.kv-more__note {
    max-width: 900px;
    margin: 22px auto 0;
    font-size: 0.93rem;
    line-height: 1.7;
    color: var(--kv-mute);
    text-align: center;
}

@media (max-width: 640px) {
    .kv-task__card,
    .kv-more__card { padding: 22px 20px 20px; }
    .kv-mat__col { padding: 22px 20px 18px; }
    .kv-room { padding: 20px 20px 18px; }
    .kv-mat__note,
    .kv-more__note { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
    .kv-task__card,
    .kv-more__card,
    .kv-task__go svg,
    .kv-more__meta svg { transition: none !important; transform: none !important; }
}

.kv-task__lead {
    max-width: 860px;
    margin: -14px auto 30px;
    font-size: 1rem;
    line-height: 1.75;
    color: var(--kv-ink-2);
    text-align: center;
}
@media (max-width: 640px) { .kv-task__lead { text-align: left; margin: -8px 0 24px; } }


/* ============================================================
   ПЕРВЫЙ ЭКРАН С ФОТОГРАФИЕЙ ОБЪЕКТА
   Хук .kv-hero--photo стоит только на shumoizolyaciya-kvartiry.html:
   сам .page-hero общий с тремя страницами конструкций, его не трогаем.
   Два класса в селекторе нужны, чтобы перебить theme-light.css —
   он подключается последним и рисует свою радиальную подсветку.
   ============================================================ */
.page-hero.kv-hero--photo {
    background: var(--lt-surface-1, #eef0f2);
    isolation: isolate;
}

/* Слой 1 — фотография. Приглушаем синеву, иначе она спорит
   с фирменным синим в заголовке и кнопках. */
.page-hero.kv-hero--photo::before {
    content: '';
    position: absolute;
    inset: -3%;
    z-index: 0;
    background: url('/img/shum/hero-shumka.webp') center 42% / cover no-repeat;
    filter: saturate(0.76) brightness(1.07) contrast(0.97);
    transform: scale(1.03);
    animation: kvHeroDrift 30s ease-in-out infinite alternate;
    pointer-events: none;
}

@keyframes kvHeroDrift {
    from { transform: scale(1.03) translate3d(0, 0, 0); }
    to   { transform: scale(1.10) translate3d(-1.4%, -1.2%, 0); }
}

/* Слой 2 — световая вуаль. Слева почти глухая, чтобы читался
   заголовок; справа отпускает фотографию за карточкой заявки.
   Нижняя растяжка гасит стык со следующей секцией. */
.page-hero.kv-hero--photo::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 1;
    background:
        linear-gradient(102deg,
            rgba(241, 244, 248, 0.94) 0%,
            rgba(241, 244, 248, 0.91) 32%,
            rgba(241, 244, 248, 0.72) 54%,
            rgba(238, 242, 248, 0.46) 76%,
            rgba(236, 241, 248, 0.34) 100%),
        linear-gradient(to bottom,
            rgba(241, 244, 248, 0.55) 0%,
            rgba(241, 244, 248, 0) 24%,
            rgba(241, 244, 248, 0) 66%,
            var(--lt-surface-1, #eef0f2) 100%);
    pointer-events: none;
}

.page-hero.kv-hero--photo > .container { position: relative; z-index: 2; }

/* Прозрачные элементы поверх фотографии становятся мутными —
   поднимаем плотность подложек. */
.kv-hero--photo .page-hero__chip {
    background: rgba(255, 255, 255, 0.80);
    border-color: rgba(26, 42, 58, 0.14);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
}
.kv-hero--photo .kv-hero__fact { background: rgba(255, 255, 255, 0.88); }
.kv-hero--photo .kv-hero__facts {
    border-color: rgba(26, 42, 58, 0.16);
    box-shadow: 0 10px 30px rgba(20, 48, 82, 0.08);
}

@media (max-width: 900px) {
    /* колонки схлопываются в одну — вуаль тоже разворачиваем вертикально */
    .page-hero.kv-hero--photo::before {
        background-image: url('/img/shum/hero-shumka-sm.webp');
    }
    /* На узком экране колонки схлопываются и первый экран становится
       очень высоким. Растягивать на него горизонтальное фото нельзя —
       cover увеличит его в разы и от комнаты останется цветное пятно.
       Поэтому прижимаем фотографию к верху фиксированной полосой. */
    .page-hero.kv-hero--photo::before {
        background-image: url('/img/shum/hero-shumka-sm.webp');
        background-position: center 45%;
        inset: -3% -3% auto -3%;
        height: 460px;
    }
    .page-hero.kv-hero--photo::after {
        background: linear-gradient(to bottom,
            rgba(241, 244, 248, 0.58) 0%,
            rgba(241, 244, 248, 0.70) 13%,
            rgba(241, 244, 248, 0.92) 27%,
            var(--lt-surface-1, #eef0f2) 44%,
            var(--lt-surface-1, #eef0f2) 100%);
    }
}

@media (prefers-reduced-motion: reduce) {
    .page-hero.kv-hero--photo::before { animation: none; transform: scale(1.03); }
}


/* ============================================================
   СОГЛАСИЕ НА ОБРАБОТКУ ПЕРСОНАЛЬНЫХ ДАННЫХ
   Карточка быстрой заявки в первом экране узкая, поэтому общий
   .form-checkbox из styles.css здесь ужимаем по типографике.
   Разметка одинаковая на всех четырёх страницах шумоизоляции.
   ============================================================ */
.kv-lead__consent { margin-bottom: 16px; }

.kv-lead__consent .form-checkbox { gap: 10px; align-items: flex-start; }
.kv-lead__consent .form-checkbox__mark { width: 18px; height: 18px; margin-top: 0; }
.kv-lead__consent .form-checkbox input:checked + .form-checkbox__mark::after {
    width: 4px;
    height: 8px;
}
.kv-lead__consent .form-checkbox__text {
    font-size: 12px;
    line-height: 1.45;
    color: var(--kv-mute);
}
.kv-lead__consent .form-checkbox__text a { color: var(--kv-ceil); }
.kv-lead__consent .form-error { margin-top: 2px; font-size: 11px; line-height: 1.4; }

/* В styles.css чекбокс скрыт через display:none — до него нельзя
   добраться с клавиатуры. Здесь возвращаем его в дерево фокуса:
   поле остаётся невидимым, но принимает Tab и Пробел, а рамку
   фокуса рисуем на «галочке». */
.kv-lead__consent .form-checkbox { position: relative; }
.kv-lead__consent .form-checkbox input[type="checkbox"] {
    display: block;
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    margin: 0;
    opacity: 0;
    cursor: pointer;
}
.kv-lead__consent .form-checkbox input:focus-visible + .form-checkbox__mark {
    outline: 2px solid var(--kv-ceil);
    outline-offset: 2px;
}