@font-face {
    font-family: SpaceGrotesk;
    src: url('../fonts/SpaceGrotesk-VariableFont_wght.ttf') format('truetype');
    font-weight: 300 800;
    font-display: swap
}

:root {
    --green: #087d47;
    --green2: #0ea85c;
    --green3: #eaf8f0;
    --ink: #18231d;
    --muted: #657168;
    --line: #dfe8e2;
    --paper: #fff;
    --soft: #f6f8f7;
    --orange: #ff6b12;
    --shadow: 0 16px 44px rgba(11, 61, 35, .12);
    --radius: 22px
}

* {
    box-sizing: border-box
}

html {
    scroll-behavior: smooth
}

body {
    margin: 0;
    font-family: SpaceGrotesk, Arial, sans-serif;
    color: var(--ink);
    background: #fff;
    line-height: 1.55
}

img {
    max-width: 100%;
    display: block
}

a {
    color: inherit
}

.container {
    width: min(1120px, calc(100% - 36px));
    margin: auto
}

.narrow {
    width: min(820px, calc(100% - 32px));
    margin: auto
}

.topline {
    font-size: 12px;
    background: #f4f5f4;
    color: #566059;
    text-align: center;
    padding: 8px 16px;
    border-bottom: 1px solid #e8ece9
}

.header {
    position: sticky;
    top: 0;
    z-index: 30;
    background: rgba(255, 255, 255, .95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line)
}

.header__inner {
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-weight: 800;
    letter-spacing: -.02em
}

.brand img {
    width: 42px;
    height: 42px
}

.brand span {
    font-size: 24px
}

.nav {
    display: flex;
    align-items: center;
    gap: 26px
}

.nav a {
    text-decoration: none;
    font-size: 14px;
    font-weight: 650
}

.nav a:hover {
    color: var(--green)
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    border: 0;
    border-radius: 12px;
    padding: 14px 20px;
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
    transition: .2s;
    font: inherit
}

.btn:hover {
    transform: translateY(-1px)
}

.btn--primary {
    background: var(--orange);
    color: #fff;
    box-shadow: 0 8px 20px rgba(255, 107, 18, .22)
}

.btn--green {
    background: var(--green);
    color: #fff
}

.btn--ghost {
    background: #fff;
    border: 1px solid var(--line)
}

.btn--block {
    width: 100%
}

.hero {
    padding: 70px 0 48px;
    background: radial-gradient(circle at 85% 25%, #dff7e9 0, transparent 32%), linear-gradient(180deg, #fff 0, #f9fcfa 100%)
}

.hero__grid {
    display: grid;
    grid-template-columns: 1.06fr .94fr;
    gap: 56px;
    align-items: center;
   
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--green);
    background: var(--green3);
    padding: 7px 11px;
    border-radius: 999px;
    font-weight: 800;
    font-size: 13px
}

.hero h1 {
    font-size: clamp(40px, 5vw, 66px);
    line-height: 1.02;
    letter-spacing: -.045em;
    margin: 18px 0 20px;
     color: white;
}

.hero p {
    font-size: 19px;
    color: #ffffff;
    max-width: 680px
}

.hero__actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin: 28px 0
}

.micro {
    font-size: 12px !important;
    color: #78837c !important
}

.hero-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 22px;
    box-shadow: var(--shadow)
}

.hero-card__top {
    background: linear-gradient(145deg, #0a8a4f, #075d38);
    border-radius: 20px;
    padding: 28px;
    color: #fff;
    min-height: 245px;
    position: relative;
    overflow: hidden
}

.hero-card__top:before,
.hero-card__top:after {
    content: '';
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, .07)
}

.hero-card__top:before {
    width: 190px;
    height: 190px;
    right: -60px;
    top: -70px
}

.hero-card__top:after {
    width: 150px;
    height: 150px;
    left: -65px;
    bottom: -70px
}

.boiler-visual {
    width: 132px;
    height: 174px;
    background: #fff;
    border-radius: 16px;
    margin: 0 auto 18px;
    position: relative;
    box-shadow: 0 18px 30px rgba(0, 0, 0, .18);
    z-index: 1
}

.boiler-visual:before {
    content: '';
    position: absolute;
    width: 72px;
    height: 10px;
    background: #dce4df;
    border-radius: 8px;
    left: 30px;
    top: 26px
}

.boiler-visual:after {
    content: '24.0°';
    position: absolute;
    color: #1d2b23;
    font-weight: 800;
    font-size: 14px;
    left: 39px;
    top: 54px;
    border: 1px solid #dfe7e2;
    border-radius: 8px;
    padding: 7px 9px
}

.hero-card__caption {
    text-align: center;
    font-size: 14px;
    margin: 0;
    color: #eafff1;
    position: relative;
    z-index: 1
}

.mini-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 14px
}

.mini {
    padding: 13px;
    border: 1px solid var(--line);
    border-radius: 14px;
    text-align: center;
    font-size: 12px
}

.mini strong {
    display: block;
    font-size: 14px;
    color: var(--green)
}

.strip {
    padding: 19px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: #fff
}

.strip__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px
}

.strip__item {
    display: flex;
    gap: 10px;
    align-items: center;
    font-weight: 700;
    font-size: 14px
}

.checkdot {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--green3);
    color: var(--green);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    font-weight: 900
}

.section {
    padding: 76px 0
}

.section--soft {
    background: var(--soft)
}

.section-title {
    font-size: clamp(30px, 4vw, 46px);
    line-height: 1.1;
    letter-spacing: -.035em;
    margin: 0 0 14px
}

.section-lead {
    font-size: 18px;
    color: var(--muted);
    max-width: 760px;
    margin: 0 0 34px
}

.cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px
}

.card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 24px;
    box-shadow: 0 7px 22px rgba(19, 52, 34, .05)
}

.card__icon {
    width: 48px;
    height: 48px;
    border-radius: 13px;
    background: var(--green3);
    color: var(--green);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 20px;
    margin-bottom: 18px
}

.card h3 {
    font-size: 21px;
    margin: 0 0 9px
}

.card p {
    color: var(--muted);
    font-size: 14px;
    margin: 0
}

.card ul {
    padding-left: 18px;
    color: #526057;
    font-size: 14px
}

.card .link {
    display: inline-block;
    color: var(--green);
    font-weight: 800;
    margin-top: 12px;
    text-decoration: none
}

.factor-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px
}

.factor {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 18px 14px;
    text-align: center;
    font-size: 13px;
    font-weight: 750
}

.factor b {
    display: block;
    font-size: 25px;
    color: var(--green);
    margin-bottom: 8px
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    counter-reset: step
}

.step {
    position: relative;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 24px
}

.step:before {
    counter-increment: step;
    content: counter(step);
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--green);
    color: #fff;
    font-weight: 900;
    margin-bottom: 17px
}

.step h3 {
    margin: 0 0 8px
}

.step p {
    margin: 0;
    color: var(--muted);
    font-size: 14px
}

.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 34px;
    align-items: center
}

.info-panel {
    background: linear-gradient(145deg, #e9f8ef, #f7fbf9);
    border: 1px solid #cce9d8;
    border-radius: 24px;
    padding: 32px
}

.info-panel h3 {
    font-size: 28px;
    margin: 0 0 12px
}

.bullets {
    display: grid;
    gap: 12px;
    margin: 20px 0
}

.bullet {
    display: flex;
    gap: 10px
}

.bullet i {
    font-style: normal;
    color: var(--green);
    font-weight: 900
}

.cta {
    background: linear-gradient(145deg, #0d8a50, #075d38);
    color: #fff;
    border-radius: 26px;
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px
}

.cta h2 {
    margin: 0 0 6px;
    font-size: 30px
}

.cta p {
    margin: 0;
    color: #dff7e9
}

.faq {
    display: grid;
    gap: 10px
}

.faq details {
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 16px 18px;
    background: #fff
}

.faq summary {
    cursor: pointer;
    font-weight: 800
}

.faq p {
    color: var(--muted);
    margin: 10px 0 2px;
    font-size: 14px
}

.footer {
    background: #111814;
    color: #d8dfda;
    margin-top: 70px
}

.footer__inner {
    padding: 50px 0 30px
}

.footer__top {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 40px
}

.footer .brand {
    color: #fff
}

.footer__links {
    display: flex;
    gap: 14px;
    flex-wrap: wrap
}

.footer__links a {
    color: #d8dfda;
    font-size: 13px
}

.footer__disclosure {
    margin-top: 30px;
    padding-top: 26px;
    border-top: 1px solid #2a332d;
    font-size: 12px;
    color: #aeb9b1;
    display: grid;
    gap: 9px
}

.footer__copy {
    margin-top: 24px;
    font-size: 12px;
    color: #7f8b83
}

/* article */
.article-header {
    padding: 24px 0;
    border-bottom: 1px solid var(--line)
}

.article-meta {
    font-size: 13px;
    color: #8a948e;
    margin: 22px 0 14px
}

.article h1 {
    font-size: clamp(36px, 5.2vw, 58px);
    line-height: 1.05;
    letter-spacing: -.04em;
    margin: 0 0 24px
}

.article p {
    font-size: 17px;
    line-height: 1.72
}

.article h2 {
    font-size: 30px;
    letter-spacing: -.02em;
    margin: 44px 0 12px
}

.article-hero-visual {
    height: 390px;
    border-radius: 18px;
    overflow: hidden;
    background: linear-gradient(165deg, #76431e 0 27%, #d4af67 27% 31%, #f3d888 31% 45%, #d7b65e 45% 48%, #b78034 48% 53%, #efd581 53% 72%, #70401d 72%);
    position: relative
}

.article-hero-visual:before {
    content: '';
    position: absolute;
    left: 8%;
    right: 8%;
    top: 14%;
    height: 9px;
    background: #442913;
    transform: rotate(-22deg);
    box-shadow: 0 74px 0 #442913, 0 148px 0 #442913, 0 222px 0 #442913
}

.article-hero-visual:after {

    position: absolute;
    right: 25px;
    bottom: 22px;
    background: #fff;
    color: var(--green);
    padding: 8px 12px;
    border-radius: 9px;
    font-weight: 900;
    font-size: 12px;
    letter-spacing: .08em
}

.keybox {
    border-left: 5px solid var(--green);
    background: #f5f7f6;
    border-radius: 0 12px 12px 0;
    padding: 22px 24px;
    margin: 22px 0
}

.keybox strong {
    display: block;
    margin-bottom: 11px
}

.keybox ul {
    margin: 0;
    padding-left: 20px
}

.keybox li {
    margin: 8px 0
}

.article-cta {
    background: linear-gradient(145deg, #0a8a4f, #075d38);
    color: #fff;
    border-radius: 18px;
    padding: 28px;
    text-align: center;
    margin: 30px 0
}

.article-cta h3 {
    font-size: 24px;
    margin: 0 0 6px
}

.article-cta p {
    margin: 0 0 18px;
    color: #e4f8eb;
    font-size: 14px
}

.property-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 9px;
    margin: 14px 0 32px
}

.property-choice {
    background: #fff;
    border: 1px solid #d7ded9;
    border-radius: 10px;
    padding: 14px 8px;
    text-align: center;
    text-decoration: none;
    font-size: 13px;
    font-weight: 800;
    transition: .2s
}

.property-choice:hover {
    border-color: var(--green);
    background: #f0faf4
}

.property-choice span {
    font-size: 26px;
    display: block;
    margin-bottom: 4px
}

.number-list {
    display: grid;
    gap: 0;
    margin: 16px 0 34px
}

.number-row {
    display: flex;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid var(--line)
}

.num {
    width: 27px;
    height: 27px;
    border-radius: 50%;
    background: var(--green2);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    flex: 0 0 auto
}

.disclaimer-note {
    font-size: 12px !important;
    color: #879188 !important;
    border-top: 1px solid var(--line);
    padding-top: 16px;
    margin-top: 40px !important
}

/* form */
.form-page {
    min-height: 100vh;
    background: #f4f8f5;
    padding: 48px 0
}

.form-shell {
    width: min(760px, calc(100% - 28px));
    margin: auto
}

.form-head {
    text-align: center;
    margin-bottom: 24px
}

.form-head h1 {
    font-size: clamp(32px, 5vw, 48px);
    margin: 14px 0 8px;
    letter-spacing: -.035em
}

.form-head p {
    color: var(--muted)
}

.progress {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin: 18px 0
}

.progress span {
    height: 6px;
    background: #d9e6de;
    border-radius: 10px
}

.progress span.active {
    background: var(--green)
}

.form-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 30px;
    box-shadow: var(--shadow)
}

.form-step {
    display: none
}

.form-step.active {
    display: block
}

.form-step h2 {
    font-size: 26px;
    margin: 0 0 8px
}

.form-step>p {
    color: var(--muted);
    margin-top: 0
}

.choice-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin: 20px 0
}

.choice {
    position: relative
}

.choice input {
    position: absolute;
    opacity: 0
}

.choice label {
    display: block;
    border: 1.5px solid #d8e0db;
    border-radius: 13px;
    padding: 15px;
    cursor: pointer;
    font-weight: 750;
    background: #fff
}

.choice input:checked+label {
    border-color: var(--green);
    background: #effaf4;
    box-shadow: 0 0 0 2px rgba(8, 125, 71, .08)
}

.fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px
}

.field {
    display: grid;
    gap: 6px
}

.field.full {
    grid-column: 1/-1
}

.field label {
    font-size: 13px;
    font-weight: 800
}

.field input,
.field select,
.field textarea {
    width: 100%;
    border: 1px solid #d7dfda;
    border-radius: 11px;
    padding: 13px 12px;
    font: inherit;
    background: #fff
}

.field input:focus,
.field select:focus,
.field textarea:focus {
    outline: 2px solid rgba(8, 125, 71, .16);
    border-color: var(--green)
}

.form-actions {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-top: 22px
}

.checkline {
    display: flex;
    gap: 9px;
    align-items: flex-start;
    font-size: 12px;
    color: #647069;
    margin-top: 14px
}

.status {
    font-size: 13px;
    margin-top: 12px
}

.status.error {
    color: #b42318
}

.form-note {
    font-size: 12px;
    color: #7a857e;
    text-align: center;
    margin-top: 15px
}

.hidden {
    display: none !important
}

.thanks {
    min-height: 72vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 18px
}

.thanks-card {
    max-width: 650px;
    text-align: center;
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 44px;
    background: #fff;
    box-shadow: var(--shadow)
}

.thanks-check {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--green3);
    color: var(--green);
    font-size: 32px;
    font-weight: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px
}

@media(max-width:850px) {
    .nav a:not(.btn) {
        display: none
    }

    .hero__grid,
    .split,
    .footer__top {
        grid-template-columns: 1fr
    }

    .hero {
        padding-top: 42px
    }

    .hero__grid {
        gap: 28px
    }

    .cards {
        grid-template-columns: 1fr
    }

    .factor-grid {
        grid-template-columns: repeat(2, 1fr)
    }

    .steps {
        grid-template-columns: 1fr
    }

    .strip__grid {
        grid-template-columns: 1fr;
        gap: 10px
    }

    .cta {
        display: block
    }

    .cta .btn {
        margin-top: 18px
    }

    .property-grid {
        grid-template-columns: repeat(2, 1fr)
    }
}

@media(max-width:560px) {
    .container {
        width: min(100% - 24px, 1120px)
    }

    .header__inner {
        height: 64px
    }

    .brand span {
        font-size: 20px
    }

    .brand img {
        width: 36px;
        height: 36px
    }

    .nav .btn {
        padding: 11px 13px;
        font-size: 13px
    }

    .hero h1 {
        font-size: 40px
    }

    .hero p {
        font-size: 17px
    }

    .mini-grid {
        grid-template-columns: 1fr
    }

    .section {
        padding: 54px 0
    }

    .factor-grid {
        grid-template-columns: 1fr 1fr
    }

    .form-card {
        padding: 20px
    }

    .choice-grid,
    .fields {
        grid-template-columns: 1fr
    }

    .field.full {
        grid-column: auto
    }

    .article-hero-visual {
        height: 260px
    }

    .article p {
        font-size: 16px
    }

    .property-grid {
        grid-template-columns: repeat(2, 1fr)
    }

    .footer {
        margin-top: 50px
    }
}

.hero-card__image {
    position: relative;
    width: 100%;
    height: 260px;
    overflow: hidden;
    border-radius: 18px;
}

.hero-card__image img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-card__caption {
    margin: 16px 0 0;
    font-size: 15px;
    line-height: 1.55;
    color: #4b5563;
}

@media (max-width: 768px) {
    .hero-card__image {
        height: 210px;
    }
}

.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100svh;

    display: flex;
    align-items: center;

    background-image:
        linear-gradient(90deg,
            rgba(5, 22, 16, 0.82) 0%,
            rgba(5, 22, 16, 0.68) 38%,
            rgba(5, 22, 16, 0.30) 65%,
            rgba(5, 22, 16, 0.12) 100%),
        url("/assets/images/hero-boiler.webp");

    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero__title {
    color: #fff;
}

.hero__subtitle {
    color: rgba(255, 255, 255, 0.88);
}

.hero__content {
    position: relative;
    z-index: 2;
}

.hero__eyebrow,
.hero__note {
    color: rgba(255, 255, 255, 0.78);
}

.hero-card {
    position: relative;
    z-index: 2;

    background: rgba(255, 255, 255, 0.96);
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 24px;

    padding: 18px;

    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.20);

    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}
.article-hero-visual {
  width: 100%;
  height: 430px;
  overflow: hidden;
  border-radius: 18px;
  margin: 22px 0 26px;
}

.article-hero-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

@media (max-width: 768px) {
  .article-hero-visual {
    height: 280px;
    border-radius: 14px;
  }
}
.article-hero-visual {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 18px;
  margin: 22px 0 26px;
}

.article-hero-visual img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center;
}