:root {
    --solzen-primary: #1460D1;
    --solzen-primary-dark: #1739A8;
    --solzen-secondary: var(--solzen-primary);
    --solzen-accent: #1496EF;
    --solzen-intermediate: #147CDF;
    --solzen-accent-hover: var(--solzen-primary-dark);
    --solzen-surface: color-mix(in srgb, var(--solzen-accent) 14%, white);
    --text: #172b4d;
    --text-muted: #50627e;
    --background: #ffffff;
    --background-soft: color-mix(in srgb, var(--solzen-accent) 4%, white);
    --border: color-mix(in srgb, var(--solzen-intermediate) 18%, white);
    --container: 1380px;
    --z-header: 10;
    --z-contact: 20;
    --z-skip: 30;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body {
    margin: 0;
    color: var(--text);
    background: var(--background);
    font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
    -webkit-font-smoothing: antialiased;
    line-height: 1.6;
}
::selection { background: var(--solzen-primary); color: white; }
a { color: inherit; text-decoration: none; text-underline-offset: .22em; }
a:hover { text-decoration: underline; }
a, summary { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--solzen-secondary); outline-offset: 5px; }
img { display: block; max-width: 100%; height: auto; }
h1, h2, h3 { color: var(--solzen-primary-dark); line-height: 1.15; text-wrap: balance; }
h2 { margin: 0 0 20px; font-size: clamp(1.85rem, 2.5vw, 2.6rem); letter-spacing: -.025em; }
h3 { margin: 0 0 10px; font-size: 1.2rem; }
p { margin: 0 0 18px; max-width: 70ch; text-wrap: pretty; }
.container { width: min(calc(100% - 10vw), var(--container)); margin-inline: auto; }
.section { padding: 64px 0; }
.skip-link {
    position: fixed; top: 10px; left: 16px; z-index: var(--z-skip);
    padding: 12px 20px; background: var(--solzen-primary); color: white;
    transform: translateY(-180%);
}
.skip-link:focus { transform: translateY(0); }
.site-header {
    position: sticky; top: 0; z-index: var(--z-header);
    background: white; border-bottom: 1px solid var(--border);
}
.header-container {
    min-height: 88px; display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center; gap: 24px;
}
.brand { justify-self: start; }
.brand img { width: 180px; max-height: 64px; object-fit: contain; }
.desktop-navigation {
    display: flex; gap: 4px; align-items: center;
}
.desktop-navigation a {
    display: flex; align-items: center; justify-content: center; min-height: 44px;
    padding: 10px 17px; font-size: .95rem; font-weight: 500;
    color: var(--solzen-primary-dark); white-space: nowrap;
    transition: color .2s ease-out;
}
.desktop-navigation a:hover, .desktop-navigation a:focus-visible {
    color: var(--solzen-primary); text-decoration: none;
}
.header-cta { justify-self: end; white-space: nowrap; }
.header-cta, .button {
    display: inline-flex; align-items: center; justify-content: center; gap: 14px;
    padding: 14px 24px; min-height: 48px; border-radius: 8px;
    font-weight: 650; line-height: 1.4; text-align: center;
    transition: background-color .2s ease-out, color .2s ease-out;
}
.header-cta, .button-primary { background: var(--solzen-primary); color: white; }
.header-cta:hover, .button-primary:hover { background: var(--solzen-accent-hover); text-decoration: none; }
.button-outline { border: 1px solid var(--solzen-secondary); color: var(--solzen-secondary); }
.button-outline:hover { background: var(--background-soft); text-decoration: none; }
.mobile-menu { display: none; }
.menu-icon { width: 22px; height: 22px; }
.menu-close, .mobile-menu[open] .menu-bars { display: none; }
.mobile-menu[open] .menu-close { display: block; }
.hero { padding: 28px 0 36px; }
.hero-container {
    display: grid; grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    align-items: center; gap: clamp(32px, 4vw, 64px);
}
.hero h1 {
    margin: 0 0 26px; font-size: clamp(2.7rem, 4.4vw, 4.25rem);
    line-height: 1.04; letter-spacing: -.035em; font-weight: 750; text-wrap: initial;
}
.hero-description { font-size: clamp(1.05rem, 1.6vw, 1.45rem); line-height: 1.5; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 32px; }
.hero-actions .button { min-height: 58px; }
.hero-location { display: flex; align-items: flex-start; gap: 12px; margin: 30px 0 0; color: var(--text-muted); font-size: 1rem; }
.hero-location svg { flex: 0 0 22px; width: 22px; height: 25px; color: var(--solzen-secondary); }
.hero-visual { position: relative; margin: 0; }
.hero-visual img { width: 100%; aspect-ratio: 1.44; object-fit: cover; border-radius: 12px; }
.hero-visual figcaption {
    position: absolute; right: 16px; bottom: 16px; padding: 5px 9px;
    background: var(--text); color: white; border-radius: 4px; font-size: .75rem;
}
.services { background: var(--background-soft); padding: 56px 0; }
.section-header { margin-bottom: 38px; }
.section-header h2 { max-width: 1050px; font-size: clamp(1.75rem, 2.4vw, 2.2rem); }
.section-header p { color: var(--text-muted); font-size: 1.1rem; }
.services-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 30px; }
.service-card { display: flex; align-items: flex-start; gap: 20px; min-width: 0; }
.service-icon { width: 48px; height: 48px; flex: 0 0 48px; color: var(--solzen-intermediate); }
.service-card > div { display: flex; flex-direction: column; min-width: 0; height: 100%; }
.service-card p { color: var(--text-muted); line-height: 1.5; margin-bottom: 10px; }
.service-card a { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; color: var(--solzen-secondary); font-weight: 650; margin-top: auto; align-self: flex-start; }
.service-card a span { transition: transform .2s ease-out; }
.service-card a:hover span { transform: translateX(4px); }
.about-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 100px; }
.installations { border-bottom: 1px solid var(--border); }
.installation-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.installation-photo { display: block; border-radius: 12px; overflow: hidden; background: var(--background-soft); }
.installation-photo img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.installation-photo:hover { opacity: .9; }
.photo-viewer-open { overflow: hidden; }
.photo-viewer {
    width: min(1200px, calc(100% - 32px)); max-height: calc(100dvh - 32px);
    padding: 20px; border: 0; border-radius: 12px;
    background: var(--background); color: var(--text);
}
.photo-viewer[open] { display: grid; grid-template-columns: 48px minmax(0, 1fr) 48px; gap: 12px 20px; align-items: center; }
.photo-viewer::backdrop { background: rgb(8 20 42 / .88); }
.photo-toolbar { grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.photo-heading { color: var(--solzen-primary-dark); font-weight: 650; }
.photo-controls { display: contents; }
.photo-count { grid-column: 2; grid-row: 3; justify-self: center; font-variant-numeric: tabular-nums; font-size: .9rem; color: var(--text-muted); }
.photo-viewer button {
    display: grid; place-items: center; width: 48px; min-height: 48px; padding: 12px; border: 0; border-radius: 50%;
    background: var(--solzen-surface); color: var(--solzen-primary-dark); font: inherit; cursor: pointer;
    transition: background-color .2s ease-out, color .2s ease-out;
}
.photo-viewer button:hover { background: var(--solzen-primary); color: white; }
.photo-viewer .photo-close { background: var(--background-soft); }
.photo-viewer .photo-close:hover { background: var(--solzen-primary); }
.photo-prev { grid-column: 1; grid-row: 2; }
.photo-next { grid-column: 3; grid-row: 2; }
.photo-stage { grid-column: 2; grid-row: 2; position: relative; display: grid; place-items: center; height: min(68dvh, 720px); min-width: 0; }
.photo-full { width: 100%; height: 100%; min-height: 0; object-fit: contain; }
.photo-full[hidden] { display: none; }
.photo-status { position: absolute; padding: 16px; margin: 0; text-align: center; }
.photo-status:empty { display: none; }
@media (max-width: 600px) {
    .photo-viewer { width: calc(100% - 16px); max-height: calc(100dvh - 16px); padding: 12px; }
    .photo-viewer[open] { gap: 12px 8px; }
    .photo-stage { grid-column: 1 / -1; height: min(65dvh, calc(100dvh - 180px)); }
    .photo-prev, .photo-next { grid-row: 3; }
}
.installation-more { margin-top: 24px; }
.installation-more summary { width: fit-content; padding: 12px 0; min-height: 48px; cursor: pointer; color: var(--solzen-primary); font-weight: 650; }
.installation-more[open] summary { margin-bottom: 20px; }
.installations .text-link { margin-top: 24px; }
@media (max-width: 850px) { .installation-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; } }
@media (max-width: 520px) { .installation-grid { grid-template-columns: 1fr; } }
.about-location { color: var(--solzen-secondary); font-weight: 600; }
.about-content p { color: var(--text-muted); font-size: 1.1rem; }
.text-link { display: inline-flex; align-items: center; gap: 12px; min-height: 44px; color: var(--solzen-secondary); font-weight: 650; }
.process { border-top: 1px solid var(--border); }
.process-line { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 60px; margin: 0; padding-left: 26px; }
.process-line li { padding-left: 10px; }
.process-line li::marker { color: var(--solzen-secondary); font-weight: 700; font-size: 1.1rem; }
.process-line p { color: var(--text-muted); margin: 0; }
.questions { background: var(--background-soft); }
.questions-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 100px; }
.questions-grid > div > p { color: var(--text-muted); }
.questions-list details { border-bottom: 1px solid var(--border); }
.questions-list summary { cursor: pointer; padding: 19px 0; font-size: 1.08rem; font-weight: 600; color: var(--solzen-secondary); }
.questions-list details:first-child summary { padding-top: 0; }
.questions-list p { padding: 0 0 12px; color: var(--text-muted); }
.contact { background: var(--solzen-surface); color: var(--text); }
.contact-content { display: flex; align-items: center; justify-content: space-between; gap: 70px; }
.contact-content > div { max-width: 800px; }
.contact h2 { color: var(--solzen-primary-dark); }
.contact p { color: var(--solzen-primary-dark); font-size: 1.1rem; }
.contact .contact-region { font-size: .9rem; margin-bottom: 0; }
.contact-button { flex-shrink: 0; background: white; color: var(--solzen-secondary); }
.contact-button:hover { background: var(--background-soft); text-decoration: none; }
.contact :focus-visible { outline-color: var(--solzen-secondary); }
.footer { padding: 64px 0 96px; background: white; color: var(--text-muted); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 60px; }
.footer-brand img { width: 180px; max-height: 70px; object-fit: contain; object-position: left; }
.footer-brand p { margin: 20px 0 0; }
.footer strong { display: block; color: var(--solzen-secondary); margin-bottom: 12px; }
.footer nav { display: flex; flex-direction: column; align-items: flex-start; }
.footer nav a { padding-block: 8px; overflow-wrap: anywhere; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--border); font-size: .85rem; }
.footer-bottom a { color: var(--solzen-secondary); text-decoration: underline; }
.whatsapp-float {
    position: fixed; right: 24px; bottom: max(20px, env(safe-area-inset-bottom)); z-index: var(--z-contact);
    display: flex; align-items: center; gap: 10px; min-height: 54px; padding: 12px 18px;
    border-radius: 999px; color: white; background: #16733b; font-size: .9rem; font-weight: 650;
}
.whatsapp-float svg { width: 28px; height: 28px; }
.whatsapp-float:hover { background: #10592d; text-decoration: none; }
@media (max-width: 1150px) {
    .header-container { gap: 16px; }
    .desktop-navigation { gap: 2px; }
    .desktop-navigation a { padding-inline: 12px; font-size: .9rem; }
    .services-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px; }
    .hero h1 { font-size: clamp(2.5rem, 4.3vw, 3.5rem); }
    .hero-actions { gap: 12px; }
    .hero-actions .button { padding-inline: 18px; }
    .about-grid, .questions-grid { gap: 50px; }
}
@media (max-width: 980px) {
    .header-container { position: relative; grid-template-columns: minmax(0, 1fr) auto; min-height: 76px; gap: 16px; padding-block: 8px; }
    .brand img { width: 140px; max-height: 56px; }
    .desktop-navigation { display: none; }
    .header-cta { display: none; }
    .mobile-menu { display: block; }
    .mobile-menu summary {
        display: flex; align-items: center; justify-content: center; gap: 12px;
        min-height: 48px; padding: 10px 14px; cursor: pointer; list-style: none;
        border: 1px solid var(--border); border-radius: 8px;
        color: var(--solzen-primary-dark); background: var(--background-soft); font-weight: 600;
    }
    .mobile-menu summary::-webkit-details-marker { display: none; }
    .mobile-menu[open] summary { background: var(--solzen-surface); }
    .mobile-menu nav {
        position: absolute; top: calc(100% + 8px); right: 0; left: 0;
        display: flex; flex-direction: column; gap: 4px; padding: 12px;
        max-height: calc(100dvh - 100px); overflow-y: auto; overscroll-behavior: contain;
        border: 1px solid var(--border); border-radius: 12px; background: white;
    }
    .mobile-menu nav a { display: flex; align-items: center; min-height: 48px; padding: 12px 16px; border-radius: 6px; }
    .mobile-menu nav a:not(.mobile-menu-cta):hover,
    .mobile-menu nav a:not(.mobile-menu-cta):focus-visible { background: var(--background-soft); text-decoration: none; }
    .mobile-menu nav .mobile-menu-cta { margin-top: 8px; justify-content: center; }
}
@media (max-width: 850px) {
    .container { width: calc(100% - 40px); }
    .hero { padding: 42px 0; }
    .hero-container { grid-template-columns: 1fr; gap: 34px; }
    .hero-content { max-width: 680px; }
    .hero h1 { font-size: clamp(2.5rem, 7.3vw, 3.7rem); max-width: 620px; }
    .hero-visual img { max-height: 520px; }
    .section { padding: 48px 0; }
    .about-grid, .questions-grid { grid-template-columns: 1fr; gap: 26px; }
    .process-line { gap: 26px; }
    .contact-content { flex-direction: column; align-items: flex-start; gap: 24px; }
    .footer-grid { grid-template-columns: 1.4fr 1fr; gap: 36px; }
    .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
    .container { width: calc(100% - 32px); }
    .brand img { width: 122px; }
    .header-cta { padding-inline: 12px; font-size: .8rem; }
    .hero h1 { font-size: clamp(2.3rem, 9.8vw, 3rem); }
    .hero-actions { flex-direction: column; }
    .hero-actions .button { width: 100%; }
    .hero-location { font-size: .94rem; margin-top: 24px; }
    .hero-visual img { aspect-ratio: 1.3; }
    .services-grid, .process-line, .footer-grid { grid-template-columns: 1fr; }
    .service-card { gap: 22px; }
    .service-card p { max-width: 32ch; }
    .service-icon { width: 42px; height: 42px; flex-basis: 42px; }
    .process-line { gap: 28px; }
    .contact-button { width: 100%; }
    .footer-brand { grid-column: auto; }
    .whatsapp-float { right: 16px; width: 54px; padding: 0; justify-content: center; }
    .whatsapp-float span { display: none; }
}
@media (max-width: 600px) {
    main, .footer { text-align: center; }
    main p, main h1, main h2, .footer p { margin-inline: auto; }
    .hero { padding: 32px 0; }
    .hero-container { gap: 32px; align-items: center; justify-items: center; }
    .hero-content { width: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; }
    .hero-actions, .hero-visual { width: 100%; }
    .hero h1 { font-size: clamp(2.15rem, 8vw, 3rem); line-height: 1.12; text-wrap: balance; margin-bottom: 24px; }
    .hero-description { max-width: 34ch; }
    .hero-actions { flex-direction: column; align-items: center; gap: 12px; margin-top: 28px; }
    .hero-actions .button { width: min(100%, 360px); min-height: 52px; }
    .hero-location { flex-direction: column; align-items: center; gap: 8px; max-width: 32ch; margin-top: 24px; }
    .section { padding: 36px 0; }
    main > section + section { border-top: 1px solid var(--border); }
    .installations { border-bottom: 0; }
    .section-header { margin-bottom: 24px; }
    .section-header p { margin-bottom: 0; }
    .section-header h2 { margin-bottom: 16px; }
    .services-grid, .process-line, .footer-grid { grid-template-columns: 1fr; }
    .services-grid { gap: 32px; }
    .service-card { flex-direction: column; align-items: center; justify-content: center; gap: 16px; }
    .service-card > div { height: auto; align-items: center; justify-content: center; }
    .service-card p { max-width: 34ch; }
    .service-card a { align-self: center; min-height: 48px; }
    .service-card + .service-card { padding-top: 32px; border-top: 1px solid var(--border); }
    .about-grid, .questions-grid { gap: 24px; align-items: center; }
    .about-grid h2, .questions-grid h2 { margin-bottom: 0; }
    .questions-grid > div > p { margin-top: 16px; }
    .process-line { padding-left: 0; list-style-position: inside; gap: 24px; }
    .process-line li { padding-left: 0; }
    .process-line h3 { display: block; margin: 8px 0 12px; }
    .process-line p { margin: 0 auto; max-width: 34ch; }
    .questions-list summary { padding: 20px 8px; min-height: 48px; }
    .questions-list details:first-child summary { padding-top: 20px; }
    .questions-list p { padding-inline: 8px; }
    .installation-more summary { margin-inline: auto; }
    .text-link { justify-content: center; min-height: 48px; }
    .contact-content { align-items: center; gap: 28px; }
    .contact-button { width: min(100%, 360px); }
    .mobile-menu nav a { justify-content: center; text-align: center; }
    .footer { padding: 36px 0 88px; border-top: 1px solid var(--border); }
    .footer-grid { gap: 32px; }
    .footer-brand { grid-column: auto; }
    .footer-brand img { margin-inline: auto; object-position: center; }
    .footer nav { align-items: center; }
    .footer nav a { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; }
    .footer-bottom { justify-content: center; margin-top: 32px; padding-top: 24px; gap: 12px; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition: none !important; animation: none !important; }
}