:root {
    --iso-green: #92ae1a;
    --iso-green-dark: #7d9a0d;
    --iso-yellow: #ffcc00;
    --iso-yellow-soft: #fff3b4;
    --iso-dark: #37322f;
    --iso-dark-2: #2d2927;
    --iso-text: #5a5652;
    --iso-soft: #f5f4f1;
    --iso-border: #e5e1dc;
    --iso-white: #fff;
    --iso-radius: 18px;
    --iso-shadow: 0 18px 50px rgba(39, 32, 27, .08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: "Roboto", sans-serif;
    color: var(--iso-dark);
    background: var(--iso-white);
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

h1, h2, h3, h4 { font-weight: 800; letter-spacing: -.035em; }
h2 { font-size: clamp(2rem, 4vw, 3.65rem); line-height: .98; margin-bottom: 0; }
h3 { font-size: clamp(1.35rem, 2vw, 2rem); }
p { line-height: 1.65; }

.text-white-75 { color: rgba(255,255,255,.78); }
.min-vh-75 { min-height: 75vh; }

.iso-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 20px;
    border: 0;
    border-radius: 999px;
    font-size: .9rem;
    font-weight: 800;
    line-height: 1;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.iso-btn:hover { transform: translateY(-2px); }
.iso-btn--yellow { background: var(--iso-yellow); color: #2c2926; box-shadow: 0 8px 25px rgba(255,204,0,.26); }
.iso-btn--yellow:hover { background: #ffd526; color: #2c2926; }

.iso-kicker {
    display: inline-block;
    margin-bottom: 13px;
    color: var(--iso-green);
    font-size: .72rem;
    font-weight: 900;
    letter-spacing: .13em;
    text-transform: uppercase;
}
.iso-kicker::before {
    content: "";
    display: inline-block;
    width: 24px;
    height: 3px;
    margin-right: 8px;
    vertical-align: middle;
    border-radius: 10px;
    background: var(--iso-yellow);
}
.iso-kicker--light { color: rgba(255,255,255,.85); }
.iso-kicker--yellow { color: var(--iso-yellow); }

.iso-section { padding: 96px 0; }
.iso-section--white { background: #fff; }
.iso-section--light { background: #fafaf8; }
.iso-section--soft { background: var(--iso-soft); }
.iso-section-head { margin-bottom: 42px; }
.iso-section-copy { color: #77716c; margin: 0; }

/* HERO */
.iso-hero {
    position: relative;
    min-height: 820px;
    overflow: hidden;
    color: #fff;
    background: #83641e;
}
.iso-hero {
    --hero-reveal-x: 50%;
    --hero-reveal-y: 50%;
    --hero-reveal-radius: 145px;
}
.iso-hero__bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    will-change: clip-path, opacity;
}
.iso-hero__bg--default {
    z-index: 0;
    background-image: url("../img/hero-room-default.png");
}
.iso-hero__bg--hover {
    z-index: 1;
    background-image: url("../img/hero-room-insulation.png");
    opacity: 0;
    clip-path: circle(0 at var(--hero-reveal-x) var(--hero-reveal-y));
    transition: opacity .16s ease;
}

@media (hover: hover) and (pointer: fine) {
    .iso-hero.is-reveal-active .iso-hero__bg--hover {
        opacity: 1;
        clip-path: circle(var(--hero-reveal-radius) at var(--hero-reveal-x) var(--hero-reveal-y));
    }
}
.iso-hero__shade {
    position: absolute;
    z-index: 2;
    inset: 0;
    background:
        linear-gradient(90deg, rgba(52,39,16,.52) 0%, rgba(52,39,16,.18) 48%, rgba(52,39,16,.08) 100%),
        linear-gradient(0deg, rgba(0,0,0,.18), transparent 45%);
}
.iso-navbar {
    position: absolute;
    z-index: 10;
    top: 22px;
    left: 50%;
    display: flex;
    align-items: center;
    gap: 24px;
    width: min(1180px, calc(100% - 40px));
    min-height: 62px;
    padding: 9px 12px 9px 20px;
    transform: translateX(-50%);
    border-radius: 999px;
    background: rgba(255,255,255,.97);
    box-shadow: 0 12px 40px rgba(31,24,14,.14);
    color: #2d2927;
}
.iso-brand { display: inline-flex; align-items: center; gap: 4px; font-size: 1.4rem; letter-spacing: -.06em; }
.iso-brand__dot { width: 13px; height: 13px; border-radius: 50%; background: var(--iso-yellow); box-shadow: inset 0 0 0 1px rgba(0,0,0,.06); }
.iso-nav-links { align-items: center; gap: 28px; margin-left: auto; }
.iso-nav-links a { font-size: .83rem; font-weight: 700; color: #46413d; }
.iso-nav-links a:hover { color: var(--iso-green-dark); }
.iso-nav-toggle { margin-left: auto; border: 0; background: transparent; padding: 8px; }
.iso-nav-toggle span { display: block; width: 24px; height: 2px; margin: 5px 0; background: #2d2927; }
.iso-mobile-menu { display: flex; flex-direction: column; gap: 8px; }
.iso-mobile-menu a { padding: 14px 4px; border-bottom: 1px solid var(--iso-border); font-weight: 700; }

.iso-hero__content { position: relative; z-index: 2; padding-top: 110px; padding-bottom: 70px; }
.iso-hero h1 { margin: 0 0 22px; font-size: clamp(3rem, 7vw, 6.6rem); line-height: .8; text-transform: uppercase; }
.iso-hero h1 span { color: var(--iso-green); }
.iso-hero__lead { max-width: 760px; margin-bottom: 28px; font-size: 1.04rem; color: rgba(255,255,255,.94); text-shadow: 0 1px 14px rgba(0,0,0,.16); }
.iso-scroll-hint { position: absolute; z-index: 3; left: 50%; bottom: 25px; transform: translateX(-50%); font-size: .78rem; font-weight: 700; color: rgba(255,255,255,.9); }
.iso-scroll-hint span { margin-left: 6px; }
.iso-hero-cursor {
    position: absolute;
    z-index: 20;
    top: 0;
    left: 0;
    width: 290px;
    height: 290px;
    border: 3px solid var(--iso-yellow);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    opacity: 0;
    background: rgba(255,204,0,.025);
    box-shadow: 0 0 0 1px rgba(255,255,255,.08) inset;
    transition: opacity .16s ease, background .16s ease, border-width .16s ease;
}
.iso-hero-cursor.is-visible { opacity: 1; }
.iso-hero-cursor.is-active {
    border-width: 4px;
    background: rgba(255,204,0,.07);
}

/* CAROUSEL */
.iso-showcase { display: grid; grid-template-columns: 116px minmax(0, 1fr) 116px; gap: 18px; align-items: center; }
.iso-carousel { border-radius: var(--iso-radius); }
.iso-carousel__media { position: relative; overflow: hidden; aspect-ratio: 16/8.3; border-radius: var(--iso-radius); background: #ddd; }
.iso-carousel__media img { width: 100%; height: 100%; object-fit: cover; }
.iso-carousel__media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(0,0,0,.82), rgba(0,0,0,.05) 55%); }
.iso-carousel__caption { position: absolute; z-index: 2; left: 26px; right: 26px; bottom: 25px; color: #fff; }
.iso-carousel__caption span { display: inline-block; margin-bottom: 8px; padding: 6px 10px; border-radius: 999px; background: rgba(255,255,255,.92); color: #3b3632; font-size: .62rem; font-weight: 800; text-transform: uppercase; }
.iso-carousel__caption h3 { margin: 0 0 6px; font-size: clamp(1.6rem, 3vw, 2.6rem); }
.iso-carousel__caption p { margin: 0; color: rgba(255,255,255,.88); }
.iso-carousel__indicators { bottom: -42px; gap: 5px; margin-bottom: 0; }
.iso-carousel__indicators [data-bs-target] { width: 7px; height: 7px; border: 0; border-radius: 50%; background: #d9d5d0; opacity: 1; }
.iso-carousel__indicators .active { width: 28px; border-radius: 999px; background: var(--iso-yellow); }
.iso-showcase__side { position: relative; overflow: hidden; height: 305px; padding: 0; border: 0; border-radius: 15px; background: #ddd; opacity: .5; transition: opacity .2s ease, transform .2s ease; }
.iso-showcase__side:hover { opacity: .8; transform: scale(1.015); }
.iso-showcase__side img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.8); }
.iso-showcase__arrow { position: absolute; top: 50%; width: 28px; height: 28px; display: grid; place-items: center; transform: translateY(-50%); border-radius: 50%; background: #fff; font-size: 1.2rem; box-shadow: 0 8px 20px rgba(0,0,0,.14); }
.iso-showcase__side--left .iso-showcase__arrow { right: -6px; }
.iso-showcase__side--right .iso-showcase__arrow { left: -6px; }

/* GREEN CHOICE */
.iso-green-panel { padding: 38px; border-radius: 18px; background: var(--iso-green); box-shadow: var(--iso-shadow); }
.iso-choice-card { padding: 24px; border-radius: 15px; background: #fff; }
.iso-choice-card h3 { margin: 14px 0 10px; font-size: 1.2rem; text-transform: uppercase; }
.iso-choice-card p { color: #77716c; font-size: .9rem; }
.iso-icon { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%; background: var(--iso-yellow-soft); color: #2f2a25; font-size: 1.35rem; }
.iso-choice-card__link { display: flex; justify-content: space-between; align-items: center; margin-top: 20px; padding: 13px 15px; border: 1px solid var(--iso-border); border-radius: 999px; font-size: .82rem; font-weight: 700; }
.iso-choice-card__link:hover { border-color: var(--iso-yellow); background: #fffdf1; }
.iso-green-panel__footer { display: flex; justify-content: space-between; gap: 20px; align-items: center; margin-top: 22px; color: #fff; }
.iso-green-panel__footer div { display: flex; flex-direction: column; }
.iso-green-panel__footer small { color: rgba(255,255,255,.75); margin-top: 3px; }

/* HOUSE TABS */
.iso-house-tabs { gap: 9px; }
.iso-house-tabs .nav-link { display: flex; align-items: center; gap: 11px; padding: 13px 14px; border: 1px solid #dedad5; border-radius: 10px; background: #fff; color: #514c47; text-align: left; font-size: .86rem; font-weight: 700; }
.iso-house-tabs .nav-link.active { border-color: #dec652; background: #fff8d1; color: #34302d; }
.iso-solution-card { display: grid; grid-template-columns: minmax(0,1fr) 270px; min-height: 480px; height: 100%; overflow: hidden; border-radius: 18px; background: #fff; box-shadow: var(--iso-shadow); }
.iso-solution-card__content { padding: 36px; }
.iso-solution-card__image { background-size: cover; background-position: center; }
.iso-label { display: inline-flex; margin-bottom: 14px; padding: 6px 10px; border-radius: 999px; background: #edf5ce; color: var(--iso-green-dark); font-size: .65rem; font-weight: 900; text-transform: uppercase; letter-spacing: .08em; }
.iso-mini-feature { display: flex; flex-direction: column; gap: 4px; margin-top: 12px; padding: 13px 15px; border-radius: 10px; background: #f6f5f2; }
.iso-mini-feature strong { font-size: .75rem; text-transform: uppercase; }
.iso-mini-feature span { color: #77716c; font-size: .85rem; }

/* DARK PANEL */
.iso-dark-panel { padding: 18px; border-radius: 18px; background: var(--iso-dark); color: #fff; }
.iso-performance-tabs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 7px; margin-bottom: 18px; }
.iso-performance-tabs .nav-link { width: 100%; border-radius: 8px; background: rgba(255,255,255,.07); color: #fff; font-size: .8rem; font-weight: 700; }
.iso-performance-tabs .nav-link.active { background: var(--iso-yellow); color: #312d29; }
.iso-dark-panel .tab-content { padding: 24px 12px 8px; }
.iso-dark-panel p { color: rgba(255,255,255,.72); }
.iso-dark-note { display: flex; flex-direction: column; gap: 4px; margin-top: 18px; padding: 14px; border-radius: 10px; background: rgba(255,255,255,.07); }
.iso-dark-note span { color: rgba(255,255,255,.72); font-size: .86rem; }
.iso-sun { width: min(160px, 70%); aspect-ratio: 1; margin: 0 auto; border-radius: 50%; background: var(--iso-yellow); box-shadow: 0 0 60px rgba(255,204,0,.12); }
.iso-thickness-card { padding: 34px; border: 1px solid var(--iso-border); border-radius: 17px; background: #fff; }
.iso-bars { display: flex; align-items: flex-end; gap: 14px; height: 220px; padding: 25px 20px 0; border-bottom: 1px solid #ddd; }
.iso-bar { display: flex; align-items: flex-end; justify-content: center; width: 72px; height: var(--h); min-height: 30px; padding-bottom: 8px; border-radius: 7px 7px 0 0; background: linear-gradient(180deg, #ffd84b, #e7b800); color: #4f4634; font-size: .67rem; font-weight: 800; }
.iso-bar:first-child { background: #9bbd29; color: #fff; }
.iso-inline-note { margin-top: 12px; padding: 12px 14px; border-radius: 8px; background: #f5f4f1; color: #6d6761; font-size: .82rem; }

/* MATERIALS */
#material-types { background: #fff; }
.iso-material-tabs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}
.iso-material-tabs .nav-item { min-width: 0; }
.iso-material-tabs .nav-link {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr);
    grid-template-rows: auto auto;
    column-gap: 12px;
    align-items: center;
    width: 100%;
    min-height: 60px;
    padding: 8px 12px;
    border: 1px solid var(--iso-border);
    border-radius: 10px;
    background: #fff;
    color: #3f3a36;
    text-align: left;
    box-shadow: none;
}
.iso-material-tabs .nav-link img {
    grid-column: 1;
    grid-row: 1 / 3;
    display: block;
    width: 44px;
    height: 44px;
    margin: 0;
    border-radius: 5px;
    object-fit: cover;
}
.iso-material-tabs .nav-link strong {
    grid-column: 2;
    grid-row: 1;
    align-self: end;
    overflow: hidden;
    font-size: .9rem;
    line-height: 1.15;
    white-space: nowrap;
    text-overflow: ellipsis;
}
.iso-material-tabs .nav-link span {
    grid-column: 2;
    grid-row: 2;
    align-self: start;
    margin: 3px 0 0;
    color: #8b857f;
    font-size: .72rem;
    line-height: 1.15;
}
.iso-material-tabs .nav-link.active {
    border-color: #f0c400;
    background: #fff8d6;
    color: #2f2a26;
    box-shadow: 0 0 0 1px rgba(240,196,0,.04) inset;
}
.iso-material-tabs .nav-link:focus-visible {
    outline: 3px solid rgba(255,204,0,.35);
    outline-offset: 2px;
}
.iso-material-card {
    display: grid;
    grid-template-columns: minmax(0, 44%) minmax(0, 56%);
    gap: 16px;
    min-height: 390px;
    overflow: visible;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}
.iso-material-card__image {
    min-height: 390px;
    overflow: hidden;
    border-radius: 14px;
    background-position: center;
    background-size: cover;
    box-shadow: 0 8px 24px rgba(53,45,34,.07);
}
.iso-material-card__content {
    padding: 30px 32px;
    border: 1px solid var(--iso-border);
    border-radius: 14px;
    background: #fff;
}
.iso-material-card__content h3 { margin-top: 16px; margin-bottom: 18px; }
.iso-material-card__content > p { color: #77716c; }
.iso-properties {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 22px;
}
.iso-properties span { color: #6d6761; }
.iso-properties span::before {
    content: "✓";
    margin-right: 9px;
    color: #f0b900;
    font-weight: 900;
}
.iso-info-strip { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 16px 18px; border: 1px solid #e8d977; border-radius: 10px; background: #fff9d8; }
.iso-info-strip div { display: flex; flex-direction: column; }
.iso-info-strip span { color: #756f69; font-size: .82rem; }

/* HOW TO */
.iso-how { position: relative; overflow: hidden; padding: 95px 0; background: var(--iso-green); color: #fff; }
.iso-how::after { content: ""; position: absolute; width: 520px; height: 520px; right: -190px; top: -120px; border-radius: 50%; background: rgba(255,255,255,.055); }
.iso-how h2 { max-width: 520px; }
.iso-step-list { display: flex; flex-direction: column; gap: 9px; margin-top: 28px; }
.iso-step { display: flex; gap: 12px; align-items: center; padding: 11px; border-radius: 10px; background: rgba(255,255,255,.12); }
.iso-step > span { display: grid; place-items: center; flex: 0 0 38px; width: 38px; height: 38px; border-radius: 50%; background: var(--iso-yellow); color: #302c27; font-weight: 900; }
.iso-step div { display: flex; flex-direction: column; }
.iso-step small { color: rgba(255,255,255,.72); }
.iso-step.is-active { background: #fff; color: #38332f; }
.iso-step.is-active small { color: #817b75; }
.iso-wizard { position: relative; padding: 38px; border-radius: 18px; background: #fff; color: #38332f; box-shadow: 0 20px 60px rgba(77,90,0,.18); }
.iso-wizard__number { position: absolute; top: 18px; right: 24px; color: #e7e2d8; font-size: 4rem; line-height: 1; font-weight: 900; }
.iso-wizard p { color: #77716c; }
.iso-chip-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.iso-chip-grid label { cursor: pointer; }
.iso-chip-grid input { position: absolute; opacity: 0; pointer-events: none; }
.iso-chip-grid span { display: inline-block; padding: 9px 12px; border: 1px solid #dedad5; border-radius: 999px; font-size: .78rem; font-weight: 700; transition: all .15s ease; }
.iso-chip-grid input:checked + span { border-color: var(--iso-yellow); background: #fff6c5; }

/* STATS + FOOTER */
.iso-stat-card { position: relative; overflow: hidden; height: 100%; padding: 26px; border: 1px solid var(--iso-border); border-radius: 15px; background: #fff; box-shadow: 0 12px 30px rgba(0,0,0,.03); }
.iso-stat-card::after { content: ""; position: absolute; width: 90px; height: 90px; right: -30px; top: -30px; border-radius: 50%; background: #fff4bf; }
.iso-stat-card strong { display: block; color: var(--iso-green); font-size: 2.2rem; line-height: 1; }
.iso-stat-card span { display: block; margin: 9px 0; font-weight: 800; }
.iso-stat-card p { margin: 0; color: #847e78; font-size: .85rem; }
.iso-bottom-cta { display: grid; grid-template-columns: auto 1fr auto; gap: 18px; align-items: center; padding: 18px 20px; border-radius: 13px; background: #5a544f; color: #fff; }
.iso-bottom-cta div:nth-child(2) { display: flex; flex-direction: column; }
.iso-bottom-cta small { color: rgba(255,255,255,.66); }
.iso-brand--inverse { color: #fff; }
.iso-footer { padding: 24px 0; border-top: 1px solid var(--iso-border); background: #fff; color: #7a746e; }
.iso-footer a { font-weight: 700; }

@media (pointer: fine) {
    .iso-hero { cursor: none; }
    .iso-hero a, .iso-hero button { cursor: none; }
}

@media (max-width: 1199.98px) {
    .iso-nav-links { gap: 17px; }
    .iso-showcase { grid-template-columns: 90px minmax(0,1fr) 90px; }
}

@media (max-width: 991.98px) {
    .iso-section { padding: 72px 0; }
    .iso-hero { min-height: 720px; }
    .iso-navbar { width: calc(100% - 28px); }
    .iso-showcase { grid-template-columns: 1fr; }
    .iso-showcase__side { display: none; }
    .iso-carousel__media { aspect-ratio: 16/10; }
    .iso-green-panel { padding: 26px; }
    .iso-green-panel__footer { align-items: flex-start; flex-direction: column; }
    .iso-solution-card { grid-template-columns: 1fr; }
    .iso-solution-card__image { min-height: 320px; order: -1; }
    .iso-performance-tabs { grid-template-columns: repeat(2,1fr); }
    .iso-material-card { grid-template-columns: 1fr; gap: 12px; }
    .iso-material-card__image { min-height: 320px; }
    .iso-bottom-cta { grid-template-columns: 1fr; justify-items: start; }
}

@media (max-width: 767.98px) {
    .iso-section { padding: 60px 0; }
    h2 { font-size: 2.2rem; }
    .iso-hero { min-height: 680px; }
    .iso-hero__bg { background-position: 62% center; }
    .iso-hero__content { padding-top: 120px; padding-bottom: 60px; }
    .iso-hero h1 { font-size: clamp(3rem, 15vw, 5rem); }
    .iso-hero__lead { font-size: .94rem; }
    .iso-carousel__media { aspect-ratio: 4/3; }
    .iso-carousel__caption { left: 18px; right: 18px; bottom: 18px; }
    .iso-carousel__caption p { font-size: .84rem; }
    .iso-thickness-card { padding: 24px; }
    .iso-bars { gap: 8px; padding-inline: 4px; }
    .iso-bar { width: 23%; font-size: .58rem; }
    .iso-material-tabs { grid-template-columns: 1fr; gap: 9px; }
    .iso-material-tabs .nav-link strong { white-space: normal; }
    .iso-info-strip { align-items: flex-start; flex-direction: column; }
    .iso-wizard { padding: 28px 22px; }
}

@media (max-width: 575.98px) {
    .iso-navbar { top: 12px; width: calc(100% - 18px); min-height: 54px; padding-left: 15px; }
    .iso-brand { font-size: 1.2rem; }
    .iso-hero { min-height: 650px; }
    .iso-green-panel { margin-inline: -4px; padding: 22px 15px; border-radius: 14px; }
    .iso-performance-tabs { grid-template-columns: 1fr; }
    .iso-house-tabs { display: grid; grid-template-columns: 1fr 1fr; }
    .iso-house-tabs .nav-link { font-size: .74rem; }
    .iso-solution-card__content, .iso-material-card__content { padding: 24px; }
    .iso-solution-card__image, .iso-material-card__image { min-height: 260px; }
}