:root {
    --blue: #2f3f92;
    --blue-deep: #1f2b69;
    --blue-pale: #edf1fb;
    --copper: #a9653c;
    --copper-pale: #f7eee9;
    --ink: #1c1e24;
    --muted: #626873;
    --line: #e4e5e8;
    --paper: #ffffff;
    --wash: #f8f8f7;
    --shadow: 0 24px 70px rgba(31, 43, 105, 0.11);
}

* { box-sizing: border-box; }

html { min-height: 100%; }

body {
    min-height: 100%;
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
}

a { color: inherit; text-decoration: none; }

a:hover { color: var(--blue); }

img { max-width: 100%; }

.site-header,
.site-footer,
.section-inner {
    width: min(1160px, calc(100% - 48px));
    margin: 0 auto;
}

.site-header {
    display: flex;
    align-items: center;
    gap: 28px;
    min-height: 90px;
    border-bottom: 1px solid var(--line);
}

.brand { display: inline-flex; align-items: center; flex: 1 1 auto; }

.brand img { display: block; width: min(215px, 42vw); height: auto; }

.header-actions { display: flex; align-items: center; gap: 14px; }

.language-link {
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.12em;
}

.site-nav { display: flex; align-items: center; gap: 22px; }

.site-nav a {
    color: #363944;
    font-size: 0.92rem;
    font-weight: 650;
    white-space: nowrap;
}

.site-nav a:hover { color: var(--blue); }

.nav-toggle {
    display: none;
    border: 1px solid var(--line);
    background: var(--paper);
    color: var(--ink);
    padding: 8px 11px;
    font: inherit;
    font-size: 0.86rem;
    font-weight: 700;
}

.eyebrow {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 15px;
    color: var(--copper);
    font-size: 0.74rem;
    font-weight: 750;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.eyebrow::before { width: 24px; height: 1px; background: currentColor; content: ""; }

h1,
h2,
h3,
p { margin-top: 0; }

h1,
h2 { font-family: Georgia, "Times New Roman", serif; font-weight: 400; letter-spacing: -0.035em; }

h1 { max-width: 11ch; margin-bottom: 22px; font-size: clamp(3rem, 6vw, 5.7rem); line-height: 0.99; }

h2 { margin-bottom: 15px; font-size: clamp(2rem, 3.6vw, 3.4rem); line-height: 1.08; }

h3 { margin-bottom: 8px; font-size: 1.1rem; line-height: 1.25; }

.lead { max-width: 56ch; margin-bottom: 28px; color: var(--muted); font-size: clamp(1.02rem, 1.8vw, 1.22rem); }

.button-row { display: flex; flex-wrap: wrap; gap: 12px; }

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    border: 1px solid transparent;
    padding: 11px 19px;
    font-size: 0.92rem;
    font-weight: 700;
}

.button-primary { background: var(--blue); color: #ffffff; }
.button-primary:hover { background: var(--blue-deep); color: #ffffff; }
.button-secondary { border-color: #c9ccd5; color: var(--ink); }
.button-secondary:hover { border-color: var(--blue); color: var(--blue); }

.home-hero { overflow: hidden; }

.home-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(370px, 0.88fr);
    gap: 60px;
    align-items: center;
    min-height: 620px;
    padding: 70px 0 76px;
}

.hero-copy { position: relative; z-index: 1; }

.hero-copy .lead strong { color: var(--ink); font-weight: 650; }

.hero-product {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 460px;
}

.hero-product::before,
.hero-product::after {
    position: absolute;
    border: 1px solid rgba(169, 101, 60, 0.34);
    border-radius: 50%;
    content: "";
}

.hero-product::before { width: min(100%, 510px); aspect-ratio: 1; }
.hero-product::after { width: min(80%, 405px); aspect-ratio: 1; border-color: rgba(47, 63, 146, 0.18); }

.product-disc {
    position: relative;
    z-index: 1;
    display: block;
    width: min(100%, 430px);
    filter: drop-shadow(0 26px 30px rgba(31, 43, 105, 0.16));
}

.product-caption {
    position: absolute;
    right: 0;
    bottom: 0;
    z-index: 2;
    width: min(235px, 58%);
    border-left: 2px solid var(--copper);
    background: rgba(255, 255, 255, 0.94);
    padding: 13px 0 13px 16px;
    color: var(--muted);
    font-size: 0.82rem;
}

.product-caption strong { display: block; color: var(--ink); }

.benefit-bar { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--wash); }

.benefit-grid { display: grid; grid-template-columns: repeat(3, 1fr); }

.benefit-grid article { min-height: 148px; padding: 30px 34px 28px 0; }
.benefit-grid article + article { border-left: 1px solid var(--line); padding-left: 34px; }
.benefit-grid p { max-width: 32ch; margin-bottom: 0; color: var(--muted); font-size: 0.92rem; }

.section { padding: 106px 0; }
.section-soft { background: var(--wash); }

.section-heading { max-width: 650px; margin-bottom: 45px; }
.section-heading p { max-width: 55ch; margin-bottom: 0; color: var(--muted); }

.technology-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }

.technology-card { display: flex; flex-direction: column; min-height: 245px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 25px; }
.technology-card .card-number { margin-bottom: auto; color: var(--copper); font-size: 0.76rem; font-weight: 750; letter-spacing: 0.12em; }
.technology-card p { margin-bottom: 18px; color: var(--muted); font-size: 0.9rem; }
.text-link { color: var(--blue); font-size: 0.9rem; font-weight: 750; }

.water-spotlight { display: grid; grid-template-columns: minmax(260px, 0.74fr) minmax(0, 1.26fr); gap: 70px; align-items: center; }

.water-spotlight .mini-disc { width: min(100%, 265px); margin: auto; filter: drop-shadow(0 18px 28px rgba(31, 43, 105, 0.14)); }

.plain-list { display: grid; gap: 14px; margin: 24px 0 0; padding: 0; list-style: none; }
.plain-list li { border-top: 1px solid var(--line); padding-top: 14px; color: var(--muted); }
.plain-list strong { display: inline-block; min-width: 170px; color: var(--ink); }

.approach-panel { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr); gap: 50px; border: 1px solid var(--line); background: #ffffff; padding: 48px; }
.approach-panel p { color: var(--muted); }
.approach-points { display: grid; gap: 14px; align-content: center; }
.approach-points span { border-left: 2px solid var(--copper); padding-left: 13px; font-weight: 650; }

.page-hero { border-bottom: 1px solid var(--line); padding: 92px 0 80px; }
.page-hero .lead { margin-bottom: 0; }

.content-grid { display: grid; grid-template-columns: minmax(0, 0.83fr) minmax(300px, 0.72fr); gap: 76px; align-items: start; }
.content-grid p { color: var(--muted); }
.content-grid h2 { margin-top: 50px; font-size: clamp(1.7rem, 3vw, 2.7rem); }
.content-grid h2:first-child { margin-top: 0; }

.side-note { border-top: 2px solid var(--copper); background: var(--copper-pale); padding: 28px; }
.side-note p:last-child { margin-bottom: 0; }

.feature-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.feature-list article { display: grid; grid-template-columns: 54px minmax(0, 1fr); gap: 20px; border-bottom: 1px solid var(--line); padding: 22px 0; }
.feature-list span { color: var(--copper); font-size: 0.8rem; font-weight: 750; letter-spacing: 0.1em; }
.feature-list p { margin-bottom: 0; color: var(--muted); }

.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); padding: 19px 0; }
.faq-list summary { cursor: pointer; font-weight: 700; }
.faq-list p { max-width: 65ch; margin: 12px 0 0; color: var(--muted); }

.contact-panel { max-width: 790px; border: 1px solid var(--line); background: var(--wash); padding: 42px; }
.contact-panel h2 { margin-bottom: 13px; }
.contact-panel p { color: var(--muted); }
.contact-list { display: grid; gap: 14px; margin-top: 28px; }
.contact-list div { border-top: 1px solid var(--line); padding-top: 14px; }
.contact-list strong { display: block; margin-bottom: 3px; }
.to-complete { color: var(--copper); font-weight: 700; }

.legal-copy { max-width: 780px; }
.legal-copy h2 { margin-top: 46px; font-size: clamp(1.5rem, 2.8vw, 2.35rem); }
.legal-copy p { color: var(--muted); }

.site-footer { display: grid; grid-template-columns: 1fr auto auto; gap: 34px; align-items: end; border-top: 1px solid var(--line); padding: 36px 0 42px; }
.footer-mark { display: block; width: 35px; height: 35px; }
.footer-signature { margin: 6px 0 0; color: var(--muted); font-size: 0.78rem; letter-spacing: 0.08em; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 16px; color: var(--muted); font-size: 0.83rem; font-weight: 650; }
.copyright { margin: 0; color: var(--muted); font-size: 0.78rem; text-align: right; }

.theme-mineral {
    --copper: #5d9eb0;
    --copper-pale: #e9f4f6;
    --blue-pale: #eaf2f8;
}

.theme-mineral h1,
.theme-mineral h2 {
    font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    font-weight: 650;
    letter-spacing: -0.055em;
}

.theme-mineral .home-hero {
    background: linear-gradient(135deg, #ffffff 0%, #f2f8fa 100%);
}

.theme-mineral .hero-product::before { border-radius: 18%; }
.theme-mineral .hero-product::after { border-radius: 18%; border-color: rgba(47, 63, 146, 0.22); }
.theme-mineral .technology-card { background: rgba(234, 242, 248, 0.34); }
.theme-mineral .benefit-bar { background: #f3f8fa; }

.theme-mineral .hero-product::before { border-color: rgba(93, 158, 176, 0.42); }
.theme-mineral .product-caption { border-left-color: #5d9eb0; }

@media (max-width: 900px) {
    .site-header { flex-wrap: wrap; gap: 14px; min-height: 76px; }
    .brand { flex: 1; }
    .header-actions { margin-left: auto; }
    .nav-toggle { display: inline-flex; }
    .site-nav { display: none; width: 100%; flex-direction: column; align-items: flex-start; gap: 0; border: 1px solid var(--line); background: #ffffff; padding: 9px 17px; }
    .site-nav.is-open { display: flex; }
    .site-nav a { width: 100%; padding: 11px 0; }
    .home-hero-grid,
    .water-spotlight,
    .content-grid,
    .approach-panel { grid-template-columns: 1fr; gap: 42px; }
    .home-hero-grid { min-height: auto; padding: 52px 0 64px; }
    .hero-product { min-height: 360px; }
    .benefit-grid,
    .technology-grid { grid-template-columns: repeat(2, 1fr); }
    .benefit-grid article:nth-child(3) { border-left: 0; padding-left: 0; }
    .site-footer { grid-template-columns: 1fr; align-items: start; }
    .footer-links,
    .copyright { justify-content: flex-start; text-align: left; }
}

@media (max-width: 560px) {
    .site-header,
    .site-footer,
    .section-inner { width: min(100% - 30px, 1160px); }
    h1 { max-width: 10.5ch; font-size: clamp(2.8rem, 15vw, 4rem); }
    .home-hero-grid { padding-top: 45px; }
    .hero-product { min-height: 310px; }
    .product-caption { position: relative; width: 100%; margin-top: -12px; }
    .benefit-grid,
    .technology-grid { grid-template-columns: 1fr; }
    .benefit-grid article,
    .benefit-grid article + article { min-height: auto; border-left: 0; border-bottom: 1px solid var(--line); padding: 22px 0; }
    .benefit-grid article:last-child { border-bottom: 0; }
    .section { padding: 72px 0; }
    .page-hero { padding: 65px 0 58px; }
    .approach-panel,
    .contact-panel { padding: 28px; }
    .feature-list article { grid-template-columns: 42px minmax(0, 1fr); }
}