/* Shared reading scale and consistent content width. */
body { font-family: Poppins, Arial, sans-serif; font-size: 18px; line-height: 1.85; }
button, input, select, textarea { font-family: inherit; }
.shell { width: min(1140px, calc(100% - 48px)); margin-inline: auto; }
.shell.narrow, .shell.prose { max-width: 1140px; }
.header-inner { height: 80px; gap: 20px; }
.brand, .brand:hover { color: #131517; font-size: 25px; letter-spacing: -.035em; word-spacing: .08em; font-weight: 800; white-space: nowrap; }
.nav { gap: 19px; }
.nav a { font-size: 16px; }
.header-cta { font-size: 15px; padding: 12px 18px; }
.btn { font-size: 16px; }
h1 { font-size: clamp(38px, 4.6vw, 66px); }
h2 { font-size: clamp(30px, 3.4vw, 44px); }
.section-head { max-width: 800px; }
.home-page .section-head { text-align: center; margin-inline: auto; }
.home-page .introduction h2 { text-align: center; }
.home-page .download-copy > h2, .home-page .download-copy > h2 + p { text-align: start; }
.download-label-mobile { display: none; }
.section-head p, .hero p { font-size: 19px; }
.hero { position: relative; isolation: isolate; overflow: hidden; min-height: 660px; display: flex; align-items: center; padding: 96px 0 104px; background: #101d1b; }
.hero::after { content: ''; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, #081311dc, #081311b8 50%, #081311c9); }
.hero-grid { display: flex; flex-direction: column; gap: 0; }
.hero-copy { text-align: center; max-width: 980px; margin-inline: auto; }
.hero h1 { font-size: clamp(38px, 4.6vw, 66px); letter-spacing: -.055em; line-height: 1.15; margin-bottom: 26px; }
.hero h1 { color: #fff; text-shadow: 0 2px 18px #0005; }
.hero p { max-width: 930px; margin-inline: auto; color: #f0f5f2; text-shadow: 0 1px 8px #0008; }
.hero-actions { justify-content: center; margin-top: 30px; }
.hero-art { position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%; transform: none; border: 0; border-radius: 0; box-shadow: none; }
.hero-art img { width: 100%; height: 100%; aspect-ratio: auto; object-fit: cover; }
.hero .btn-dark { background: #fff; border-color: #fff; color: #15221d; }
.hero .btn-dark:hover { background: #d4f5c7; border-color: #d4f5c7; color: #15221d; }
.hero .btn-light { background: #10201cbb; border-color: #ffffff80; color: #fff; }
.split { gap: 48px; }
.image-frame img { height: 440px; }
.work-main h2 { font-size: 30px; color: white; }
.work-row h2, .feature-card h2, .info-card h2, .benefit-card h2, .trouble-item h2, .step h2 { font-size: 22px; letter-spacing: -.03em; line-height: 1.35; }
.work-row p, .feature-card p, .info-card p, .benefit-card p, .trouble-item p, .step p, .faq-answer p { font-size: 17px; }
.steps { grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 18px; }
.step { grid-column: span 2; }
.step:nth-last-child(-n+2) { grid-column: span 3; }
.step { padding: 28px; }
.step-index { font-size: 38px; margin-bottom: 20px; }
.download-copy { padding: 42px; }
.download-copy h2 { font-size: clamp(30px, 3.1vw, 41px); }
table { font-size: 17px; }
.faq-category { font-size: 26px; margin: 36px 0 14px; }
.faq-item button { font-size: 19px; padding: 24px 0; }
.article-layout { grid-template-columns: minmax(0, 1fr) 280px; gap: 40px; }
.article-layout article h2, .prose h2 { font-size: 30px; }
.article-layout aside h2 { font-size: 24px; }
.article-layout aside a, .related a { font-size: 16px; }
.article-layout .cover { height: auto; aspect-ratio: 3 / 2; }
.post-card h2 { font-size: 23px; }
.post-card p, .prose p { font-size: 18px; }
.post-card img { height: auto; aspect-ratio: 3 / 2; }
.footer-main { grid-template-columns: 1.8fr 1fr 1fr; gap: 45px; }
.footer-main p { max-width: 510px; font-size: 17px; }
.footer-main h2 { font-size: 23px; letter-spacing: -.025em; }
.footer-main a:not(.brand) { font-size: 17px; }
.footer-bottom { font-size: 14px; letter-spacing: -.015em; align-items: center; gap: 12px; flex-wrap: nowrap; }
.footer-bottom > * { flex: 0 0 auto; white-space: nowrap; }
.footer-bottom > span { text-align: right; }
@media (max-width: 1100px) {
  .header-inner { gap: 14px; }
  .brand { font-size: 23px; }
  .nav { gap: 12px; }
  .nav a { font-size: 15px; }
  .header-cta { font-size: 14px; padding: 11px 14px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 10px; }
  .footer-bottom > span { text-align: left; }
}
@media (max-width: 1000px) {
  .menu-btn { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; padding: 10px; flex: 0 0 44px; margin-left: 0; border-radius: 10px; background: #162020; color: #fff; }
  .nav { display: none; position: absolute; left: 24px; right: 24px; top: 79px; background: white; border: 1px solid #e2e8e5; border-radius: 17px; padding: 16px; box-shadow: 0 25px 40px #0002; flex-direction: column; align-items: stretch; gap: 0; }
  .nav.open { display: flex; }
  .nav a { font-size: 18px; padding: 11px; }
  .header-cta { margin-left: auto; }
}
@media (max-width: 900px) {
  .split, .article-layout { grid-template-columns: 1fr; }
  .image-frame img { height: auto; max-height: 460px; }
  .footer-main { gap: 28px; grid-template-columns: 1.5fr 1fr 1fr; }
  .download-copy { padding: 36px; }
  .hero-art img { height: 100%; }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .step, .step:nth-last-child(-n+2) { grid-column: auto; }
  .step:last-child { grid-column: 1 / -1; }
}
@media (max-width: 600px) {
  body { font-size: 17px; }
  .shell { width: min(1140px, calc(100% - 32px)); }
  .header-inner { height: 68px; }
  .header-inner { gap: 8px; }
  .header-inner .brand, .header-inner .brand:hover { font-size: clamp(14px, 3.7vw, 20px); gap: 6px; }
  .header-inner .brand img { width: 30px; height: 30px; border-radius: 8px; }
  .header-cta { display: inline-flex; width: auto; flex-shrink: 0; font-size: 12px; padding: 9px 10px; margin-left: auto; white-space: nowrap; }
  .download-label-wide { display: none; }
  .download-label-mobile { display: inline; }
  .menu-btn { width: 40px; height: 40px; flex-basis: 40px; padding: 8px; }
  .nav { top: 67px; left: 16px; right: 16px; }
  .hero { padding: 64px 0; min-height: 640px; }
  .hero-grid { gap: 0; }
  .hero p, .section-head p { font-size: 18px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .hero-art { border-radius: 0; }
  .hero-art img { height: 100%; aspect-ratio: auto; }
  .steps { grid-template-columns: 1fr; }
  .step:last-child { grid-column: auto; }
  .download-copy { padding: 28px; }
  th, td { padding: 14px; min-width: 150px; }
  .faq-item button { font-size: 18px; }
  .footer-main { grid-template-columns: 1fr; }
  .footer-main > div:first-child { grid-column: auto; }
  .footer-bottom { display: flex; flex-direction: column; gap: 14px; }
  .footer-bottom > span { text-align: left; }
  .footer-bottom { font-size: clamp(8.5px, 2.3vw, 14px); }
  .article-layout article h2, .prose h2 { font-size: 28px; }
}
@media (max-width: 360px) {
  .header-inner { gap: 6px; }
  .header-inner .brand, .header-inner .brand:hover { font-size: 13px; gap: 5px; }
  .header-inner .brand img { width: 28px; height: 28px; }
  .header-cta { font-size: 11px; padding: 8px; }
  .menu-btn { width: 36px; height: 36px; flex-basis: 36px; padding: 6px; }
  .footer-bottom { font-size: 7px; }
}

/* Compact homepage spacing across desktop and mobile. */
.home-page .section { padding: 64px 0; }
.home-page .hero { min-height: 540px; padding: 64px 0 72px; }
.home-page .introduction p:last-child { margin-bottom: 0; }
@media (max-width: 600px) {
  .home-page .section { padding: 44px 0; }
  .home-page .hero { min-height: 0; padding: 44px 0 52px; }
}

/* Installation follows one connected path instead of a card grid. */
.install-timeline { list-style: none; width: 100%; max-width: 1140px; padding: 0; margin: 44px auto 0; }
.install-step { position: relative; display: grid; grid-template-columns: 60px 28px minmax(0, 1fr); column-gap: 22px; row-gap: 8px; padding: 0 0 38px; }
.install-step::before { content: ''; position: absolute; left: 29px; top: 52px; bottom: 8px; width: 2px; background: linear-gradient(#91b8aa, #dce9e3); }
.install-step:last-child { padding-bottom: 0; }
.install-step:last-child::before { display: none; }
.install-number { grid-column: 1; grid-row: 1 / 3; align-self: start; display: grid; place-items: center; width: 60px; height: 52px; color: #386b59; background: #edf6f0; border-radius: 50%; font-size: 24px; font-weight: 800; line-height: 1; }
.install-step > svg { grid-column: 2; grid-row: 1; align-self: center; width: 25px; height: 25px; color: #4c7e6b; margin: 0; }
.install-step > h2 { grid-column: 3; grid-row: 1; align-self: center; margin: 0; font-size: 23px; line-height: 1.4; letter-spacing: -.03em; }
.install-step > p { grid-column: 3; grid-row: 2; margin: 0; font-size: 17px; }
@media (max-width: 600px) {
  .install-timeline { margin-top: 32px; }
  .install-step { grid-template-columns: 44px minmax(0, 1fr); column-gap: 18px; padding-bottom: 30px; }
  .install-number { width: 44px; height: 44px; font-size: 19px; }
  .install-step::before { left: 21px; top: 48px; bottom: 4px; }
  .install-step > svg { display: none; }
  .install-step > h2 { grid-column: 2; font-size: 20px; }
  .install-step > p { grid-column: 2; font-size: 16px; }
}
/* Full-width editorial flow for the brightness explanation. */
#how-it-works .shell { width: min(1140px, calc(100% - 48px)); }
.brightness-flow { display: grid; grid-template-columns: 1.15fr 1fr 1fr; gap: 42px; width: 100%; max-width: 1140px; margin: 44px auto 0; }
.brightness-stage { position: relative; padding-top: 24px; border-top: 2px solid #bdd6c9; }
.brightness-stage::before { content: ''; position: absolute; top: -5px; left: 0; width: 8px; height: 8px; border-radius: 50%; background: #467b65; }
.flow-label { display: block; color: #46705e; font-size: 12px; font-weight: 700; letter-spacing: .12em; margin-bottom: 18px; }
.brightness-stage h3 { font-size: 25px; line-height: 1.3; margin-bottom: 14px; letter-spacing: -.03em; }
.brightness-stage p { margin: 0; font-size: 17px; line-height: 1.85; }
@media (max-width: 800px) {
  .brightness-flow { grid-template-columns: 1fr; gap: 30px; margin-top: 32px; }
  .brightness-stage { padding-top: 18px; }
  .flow-label { margin-bottom: 10px; }
  .brightness-stage h3 { font-size: 23px; }
}
@media (max-width: 600px) {
  #how-it-works .shell { width: min(1140px, calc(100% - 32px)); }
}
/* Feature cards with a consistent icon, title and reading rhythm. */
#features > .shell { width: min(1140px, calc(100% - 48px)); }
.home-page #features .section-head { text-align: center; margin: 0 auto 36px; max-width: 800px; }
.feature-list { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 22px; }
.feature-item { grid-column: span 2; position: relative; overflow: hidden; padding: 30px; border: 1px solid #dce8e1; border-radius: 22px; background: linear-gradient(145deg, #f3faf5, #fff 75%); box-shadow: 0 6px 20px #193e2c06; transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease; }
.feature-item:nth-child(2) { background: linear-gradient(145deg, #edf6f7, #fff 75%); }
.feature-item:nth-child(3) { background: linear-gradient(145deg, #f7f6ee, #fff 75%); }
.feature-item:nth-child(n+4) { grid-column: span 3; }
.feature-item::after { content: ''; position: absolute; right: -24px; top: -24px; width: 100px; height: 100px; border: 1px solid #71a68b24; border-radius: 50%; pointer-events: none; }
.feature-item > svg { display: block; box-sizing: content-box; width: 27px; height: 27px; padding: 13px; margin: 0 0 24px; color: #326c53; background: #dfefe5; border-radius: 16px; }
.feature-item:nth-child(2) > svg { color: #326c72; background: #dfeff0; }
.feature-item:nth-child(3) > svg { color: #766633; background: #eeead6; }
.feature-item h3 { margin: 0 0 12px; font-size: 22px; line-height: 1.35; letter-spacing: -.025em; }
.feature-item p { margin: 0; font-size: 17px; line-height: 1.8; color: #536259; }
@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .feature-item:hover { transform: translateY(-5px); box-shadow: 0 16px 32px #193e2c12; border-color: #95bba5; }
}
@media (max-width: 900px) {
  .feature-list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
  .feature-item, .feature-item:nth-child(n+4) { grid-column: auto; }
  .feature-item:last-child { grid-column: 1 / -1; }
}
@media (max-width: 600px) {
  #features > .shell { width: min(1140px, calc(100% - 32px)); }
  .feature-list { grid-template-columns: 1fr; gap: 16px; }
  .feature-item { padding: 25px; }
  .feature-item h3 { font-size: 21px; }
  .feature-item p { font-size: 16px; }
  .feature-item > svg { margin-bottom: 20px; }
}
/* Troubleshooting reads as four clear checks instead of a two-column grid. */
#troubleshooting > .shell { width: min(1140px, calc(100% - 48px)); }
.fix-checklist { list-style: none; margin: 32px 0 0; padding: 0; }
.fix-checklist > li { display: grid; grid-template-columns: 44px minmax(200px, .8fr) minmax(0, 1.5fr); gap: 24px; align-items: baseline; padding: 24px 0; border-top: 1px solid #dfe8e3; }
.fix-number { color: #52816a; font-size: 15px; font-weight: 700; letter-spacing: .06em; }
.fix-checklist h3 { margin: 0; font-size: 22px; letter-spacing: -.025em; line-height: 1.4; }
.fix-checklist p { margin: 0; font-size: 17px; line-height: 1.8; }
@media (max-width: 800px) {
  .fix-checklist > li { grid-template-columns: 36px minmax(0, 1fr); gap: 8px 16px; }
  .fix-number { grid-row: 1 / 3; }
  .fix-checklist p { grid-column: 2; }
}
@media (max-width: 600px) {
  #troubleshooting > .shell { width: min(1140px, calc(100% - 32px)); }
  .fix-checklist h3 { font-size: 20px; }
  .fix-checklist p { font-size: 16px; }
  .fix-checklist > li { padding: 20px 0; }
}
/* Keep inner-page introductions close to their first content section. */
.page-hero { padding: 44px 0 28px; }
.page-hero p:last-child { margin-bottom: 0; }
.page-hero + .section { padding-top: 36px; padding-bottom: 64px; }
.page-hero + .section > .prose > h2:first-child,
.page-hero + .section > .shell > .prose > h2:first-child { margin-top: 0; }
@media (max-width: 600px) {
  .page-hero { padding: 30px 0 22px; }
  .page-hero + .section { padding-top: 26px; padding-bottom: 44px; }
}
/* Allow footer text to wrap instead of shrinking to unreadable sizes. */
.footer-bottom { flex-wrap: wrap; font-size: 14px; }
.footer-bottom > * { flex: 1 1 280px; white-space: normal; overflow-wrap: anywhere; }
@media (max-width: 1100px) {
  .footer-bottom > * { flex: 0 1 auto; }
}
.skip-link { position: fixed; top: 8px; left: 16px; z-index: 100; padding: 10px 18px; background: #fff; color: #131517; border: 2px solid #276d59; transform: translateY(-160%); }
.skip-link:focus { transform: none; }
/* Enlarged navigation needs more space than the original small-text header. */
@media (min-width: 1001px) and (max-width: 1250px) {
  .header-inner { gap: 10px; }
  .header-inner .brand { font-size: 20px; gap: 7px; }
  .nav { gap: 10px; }
  .nav a { font-size: 13px; }
  .header-cta { font-size: 13px; padding: 10px 12px; }
}