@font-face { font-family: "NunitoLocal"; src: url("Nunito-Regular.woff2") format("woff2"), url("Nunito-Regular.ttf") format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: "NunitoLocal"; src: url("Nunito-Bold.woff2") format("woff2"), url("Nunito-Bold.ttf") format("truetype"); font-weight: 700; font-display: swap; }
@font-face { font-family: "NunitoLocal"; src: url("Nunito-ExtraBold.woff2") format("woff2"), url("Nunito-ExtraBold.ttf") format("truetype"); font-weight: 800; font-display: swap; }

:root {
    --paper: #fbfaf7;
    --ink: #17211f;
    --muted: #5f6d68;
    --line: rgba(23, 33, 31, 0.13);
    --soft: #eef5f4;
    --accent: #007c72;
    --accent-dark: #005f58;
    --warm: #bd6a4f;
    --danger: #8b3f2f;
    --shadow: 0 28px 90px rgba(23, 33, 31, 0.13);
    --radius: 10px;
    --header-h: 74px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); }
body { margin: 0; font-family: "Segoe UI Variable", "Segoe UI", Arial, system-ui, sans-serif; color: var(--ink); background: var(--paper); line-height: 1.55; -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; }
a { color: inherit; }
:focus-visible { outline: 3px solid rgba(0,124,114,0.32); outline-offset: 4px; }
.container { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }

.site-header { position: sticky; top: 0; z-index: 1000; min-height: var(--header-h); border-bottom: 1px solid var(--line); background: rgba(251,250,247,0.9); backdrop-filter: blur(18px); }
.site-header__inner { min-height: var(--header-h); display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { width: 128px; height: auto; }
.brand span { max-width: 190px; padding-left: 12px; border-left: 1px solid var(--line); color: var(--muted); font-size: 12px; line-height: 1.25; }
.desktop-nav { display: flex; align-items: center; gap: 22px; }
.desktop-nav a { color: rgba(23,33,31,0.72); font-size: 15px; font-weight: 800; text-decoration: none; }
.desktop-nav a:hover { color: var(--ink); }
.phone-link { font-weight: 800; text-decoration: none; white-space: nowrap; }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 13px 20px; border: 1px solid transparent; border-radius: var(--radius); font-weight: 800; line-height: 1; text-decoration: none; transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 16px 38px rgba(0,124,114,0.22); }
.btn-primary:hover { background: var(--accent-dark); }
.btn-soft { border-color: var(--line); background: #fff; color: var(--ink); }

.method-hero { padding: 92px 0 72px; background:
    radial-gradient(circle at 88% 10%, rgba(0,124,114,0.14), transparent 34%),
    linear-gradient(135deg, #fbfaf7 0%, #eef5f4 100%);
}
.method-hero__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, 430px); gap: 64px; align-items: end; }
.method-hero--background {
    padding: 86px 0 72px;
    background:
        linear-gradient(90deg, rgba(251,250,247,0.96) 0%, rgba(251,250,247,0.93) 38%, rgba(251,250,247,0.58) 58%, rgba(251,250,247,0.08) 78%),
        linear-gradient(180deg, rgba(251,250,247,0.28) 0%, rgba(251,250,247,0.76) 100%),
        var(--method-hero-image),
        linear-gradient(135deg, #fbfaf7 0%, #eef5f4 100%);
    background-position: center;
    background-size: cover;
}
.method-hero--oxyterra { --method-hero-image: url("oxyterra-hero.webp"); }
.method-hero--hydrogen { --method-hero-image: url("hydrogen-therapy-hero.webp"); }
.method-hero--background.method-hero--hydrogen h1 {
    max-width: 640px;
    font-size: clamp(38px, 4vw, 54px);
    line-height: 1.02;
}
.method-hero--background.method-hero--hydrogen .lead {
    max-width: 610px;
}
.method-hero--background.method-hero--hydrogen .method-hero__quick {
    max-width: 640px;
}
.method-hero--background .method-hero__grid {
    grid-template-columns: minmax(0, 760px);
    min-height: clamp(520px, 48vw, 660px);
    align-items: center;
    gap: 24px;
}
.method-hero--background h1 {
    max-width: 690px;
    font-size: clamp(42px, 4.7vw, 64px);
    line-height: 1;
}
.method-hero--background .lead {
    max-width: 650px;
    font-size: clamp(18px, 1.65vw, 22px);
    line-height: 1.34;
}
.method-hero--background .back-link {
    margin-bottom: 24px;
}
.method-hero--background .hero-actions {
    margin-top: 24px;
}
.method-hero--background .legal-warning {
    margin-top: 14px;
}
.method-hero__quick {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    max-width: 690px;
    margin-top: 0;
}
.method-hero__quick div {
    padding: 15px 16px;
    border: 1px solid rgba(23, 33, 31, 0.12);
    border-radius: var(--radius);
    background: rgba(255,255,255,0.68);
    box-shadow: 0 14px 34px rgba(23,33,31,0.06);
}
.method-hero__quick strong,
.method-hero__quick span { display: block; }
.method-hero__quick strong {
    color: var(--accent-dark);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}
.method-hero__quick span {
    margin-top: 7px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.38;
}
.back-link { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 30px; color: var(--accent-dark); font-size: 14px; font-weight: 800; text-decoration: none; }
.back-link::before { content: "←"; }
.kicker { display: block; margin-bottom: 14px; color: var(--accent-dark); font-size: 13px; font-weight: 800; letter-spacing: 0.13em; text-transform: uppercase; }
h1, h2, h3, p { margin: 0; }
h1 { max-width: 770px; font-size: clamp(42px, 6vw, 82px); font-weight: 800; line-height: 0.98; text-wrap: balance; }
.lead { max-width: 710px; margin-top: 22px; color: var(--muted); font-size: clamp(20px, 2vw, 26px); font-weight: 700; line-height: 1.28; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.legal-warning { max-width: 680px; margin-top: 18px; color: rgba(23,33,31,0.58); font-size: 13px; font-weight: 700; line-height: 1.45; }
.method-card { padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,0.82); box-shadow: var(--shadow); }
.method-card--cover { overflow: hidden; padding: 0; }
.method-cover { position: relative; margin: 0; background: #e8f1f0; }
.method-cover::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 48%, rgba(9, 35, 31, 0.44)); pointer-events: none; }
.method-cover img { width: 100%; height: clamp(320px, 39vw, 470px); object-fit: cover; object-position: center; }
.method-cover figcaption { position: absolute; right: 18px; bottom: 18px; left: 18px; z-index: 1; color: #fff; font-size: 13px; font-weight: 800; line-height: 1.35; text-shadow: 0 2px 18px rgba(0,0,0,0.28); }
.method-card__body { padding: 30px; }
.method-hero--media .method-hero__grid { grid-template-columns: minmax(0, 0.92fr) minmax(460px, 1.08fr); align-items: center; gap: 48px; }
.method-card--hero-media .method-cover img { height: auto; aspect-ratio: 16 / 9; object-fit: cover; object-position: center; }
.method-card--hero-media .method-cover::after { background: linear-gradient(180deg, rgba(9,35,31,0.02) 42%, rgba(9,35,31,0.34)); }
.method-card--hero-media .method-card__body { padding: 26px 28px 30px; }
.method-card--hero-media .fact-list { gap: 12px; margin-top: 18px; }
.method-card--hero-media .fact-list li { grid-template-columns: 96px 1fr; padding-top: 12px; }
.method-card h2 { font-size: 26px; line-height: 1.08; }
.fact-list { display: grid; gap: 16px; margin: 24px 0 0; padding: 0; list-style: none; }
.fact-list li { display: grid; grid-template-columns: 112px 1fr; gap: 18px; padding-top: 16px; border-top: 1px solid var(--line); }
.fact-list strong { color: var(--accent-dark); font-size: 13px; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; }
.fact-list span { color: var(--muted); }

.method-section { padding: 84px 0; }
.method-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, 380px); gap: 64px; align-items: start; }
.content-flow { display: grid; gap: 44px; }
.content-block { padding-bottom: 44px; border-bottom: 1px solid var(--line); }
.content-block:last-child { border-bottom: 0; padding-bottom: 0; }
.content-block h2, .side-panel h2 { font-size: clamp(28px, 3vw, 42px); font-weight: 800; line-height: 1.06; text-wrap: balance; }
.content-block p { margin-top: 16px; color: var(--muted); font-size: 18px; }
.content-block ul, .content-block ol { display: grid; gap: 12px; margin: 18px 0 0; padding: 0; list-style: none; color: var(--muted); font-size: 17px; }
.content-block li { position: relative; padding-left: 26px; }
.content-block li::before { content: ""; position: absolute; left: 0; top: 0.72em; width: 8px; height: 8px; border-radius: 999px; background: var(--accent); }
.side-panel { position: sticky; top: calc(var(--header-h) + 28px); display: grid; gap: 22px; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 18px 50px rgba(23,33,31,0.07); }
.side-panel ol { display: grid; gap: 14px; margin: 0; padding-left: 20px; color: var(--muted); }
.side-panel li::marker { color: var(--accent-dark); font-weight: 800; }
.side-panel p { color: var(--muted); }

.method-footer { padding: 46px 0 28px; background: #101815; color: rgba(255,255,255,0.66); }
.method-footer__grid { display: grid; grid-template-columns: 1.2fr 1fr 1.2fr; gap: 34px; }
.method-footer img { width: 132px; filter: brightness(0) invert(1); }
.method-footer h3 { margin: 0 0 12px; color: #fff; font-size: 16px; font-weight: 800; }
.method-footer p, .method-footer a { display: block; margin: 0 0 8px; color: rgba(255,255,255,0.66); font-size: 14px; text-decoration: none; }
.method-footer a:hover { color: #fff; }
.footer-bottom { margin-top: 28px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.12); color: rgba(255,255,255,0.42); font-size: 13px; }

@media (max-width: 900px) {
    .desktop-nav, .phone-link { display: none; }
    .method-hero__grid, .method-layout, .method-footer__grid { grid-template-columns: 1fr; }
    .method-hero--media .method-hero__grid { grid-template-columns: 1fr; }
    .method-hero--background {
        background:
            linear-gradient(180deg, rgba(251,250,247,0.98) 0%, rgba(251,250,247,0.92) 54%, rgba(251,250,247,0.76) 100%),
            var(--method-hero-image),
            linear-gradient(135deg, #fbfaf7 0%, #eef5f4 100%);
        background-position: 58% center;
        background-size: cover;
    }
    .method-hero--background .method-hero__grid {
        min-height: auto;
    }
    .method-hero__quick {
        grid-template-columns: 1fr;
    }
    .side-panel { position: static; }
}

@media (max-width: 620px) {
    :root { --header-h: 68px; }
    .container { width: min(100% - 32px, 1160px); }
    .brand img { width: 112px; }
    .brand span { display: none; }
    .method-hero { padding: 58px 0 54px; }
    .method-section { padding: 62px 0; }
    .hero-actions { display: grid; grid-template-columns: 1fr; }
    .fact-list li { grid-template-columns: 1fr; gap: 5px; }
    .method-card, .side-panel { padding: 22px; }
    .method-card--cover { padding: 0; }
    .method-card--cover .method-card__body { padding: 22px; }
    .method-cover img { height: 300px; }
    .method-card--hero-media .method-cover img { height: auto; aspect-ratio: 4 / 3; object-position: 58% center; }
    .method-card--hero-media .fact-list li { grid-template-columns: 1fr; }
}