:root {
  --ink: #17302a;
  --forest: #17483b;
  --forest-2: #0e382e;
  --cream: #f5f0e5;
  --paper: #fffdf7;
  --sun: #f5a524;
  --coral: #e76545;
  --mint: #b9d8c8;
  --line: rgba(23, 48, 42, .16);
  --muted: #607069;
  --shadow: 0 18px 48px rgba(23, 48, 42, .12);
  --radius: 22px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 4%, rgba(245,165,36,.16), transparent 25rem),
    linear-gradient(180deg, #fbf7ed 0, var(--cream) 100%);
  font-family: "Avenir Next", Avenir, "Segoe UI", sans-serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  opacity: .18;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180' viewBox='0 0 180 180'%3E%3Cpath d='M-20 61c41-27 67 15 108-9s70-13 112 9M-23 121c33-19 70 16 108-7s68-11 117 12' fill='none' stroke='%2317483b' stroke-opacity='.12'/%3E%3C/svg%3E");
  transform: translate3d(0, var(--page-shift, 0px), 0);
  will-change: transform;
  z-index: -1;
}
a { color: inherit; }
img { display: block; max-width: 100%; }
button, input, textarea { font: inherit; }
:focus-visible { outline: 3px solid var(--sun); outline-offset: 3px; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 200; background: var(--paper); padding: .7rem 1rem; border-radius: 10px; }
.skip-link:focus { top: 1rem; }
.wrap { width: min(calc(100% - 2rem), var(--max)); margin-inline: auto; }
.narrow { width: min(calc(100% - 2rem), 780px); margin-inline: auto; }

.site-header { position: sticky; top: 0; z-index: 100; background: rgba(245,240,229,.88); backdrop-filter: blur(18px); border-bottom: 1px solid var(--line); transition: background .3s ease, box-shadow .3s ease; }
.site-header.scrolled { background: rgba(255,253,247,.95); box-shadow: 0 8px 30px rgba(23,48,42,.1); }
.scroll-progress { position: absolute; left: 0; right: 0; bottom: -1px; height: 3px; background: linear-gradient(90deg, #a4cb24, #20b24b 55%, var(--sun)); transform: scaleX(0); transform-origin: left center; will-change: transform; }
.nav { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { display: inline-flex; align-items: center; gap: .75rem; text-decoration: none; font-weight: 900; letter-spacing: .02em; }
.brand-logo { width: 54px; height: 54px; object-fit: contain; filter: drop-shadow(0 5px 8px rgba(23,48,42,.14)); transition: transform .35s cubic-bezier(.2,.8,.2,1), filter .35s ease; }
.brand:hover .brand-logo { transform: translateY(-2px) rotate(-2deg) scale(1.04); filter: drop-shadow(0 9px 10px rgba(23,48,42,.2)); }
.brand-copy { display: grid; line-height: 1.05; }
.brand-copy strong { font-family: Georgia, "Times New Roman", serif; font-size: 1.05rem; letter-spacing: -.01em; }
.brand small { display: block; margin-top: .28rem; color: var(--muted); font-size: .65rem; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.nav-links { order: 2; display: flex; align-items: center; gap: 1rem; margin-left: auto; }
.nav-links a { text-decoration: none; font-weight: 700; font-size: .94rem; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--coral); }
.nav-cta { padding: .68rem 1rem; color: var(--paper)!important; background: var(--forest); border-radius: 999px; }
.menu-button { display: none; border: 0; background: transparent; color: var(--ink); width: 46px; height: 46px; border-radius: 50%; }
.nav-actions { order: 3; display: flex; align-items: center; gap: .65rem; }
.language-switcher { display: inline-flex; padding: 3px; background: rgba(23,72,59,.08); border: 1px solid var(--line); border-radius: 999px; }
.language-switcher a { display: inline-flex; align-items: center; justify-content: center; min-width: 34px; min-height: 36px; padding: .28rem .5rem; color: var(--muted); border-radius: 999px; font-size: .72rem; font-weight: 900; text-align: center; text-decoration: none; letter-spacing: .05em; }
.language-switcher a:hover { color: var(--forest); }
.language-switcher a.active { color: var(--paper); background: var(--forest); }

.hero { position: relative; overflow: hidden; padding: clamp(4rem, 9vw, 8rem) 0 5rem; }
.hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: clamp(2rem, 6vw, 6rem); }
.eyebrow { display: inline-flex; align-items: center; gap: .55rem; margin: 0 0 1rem; color: var(--forest); font-size: .78rem; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 28px; height: 3px; background: var(--sun); border-radius: 2px; }
h1, h2, h3 { font-family: Georgia, "Times New Roman", serif; line-height: 1.08; letter-spacing: -.035em; }
h1 { margin: 0 0 1.35rem; font-size: clamp(3rem, 7vw, 6.7rem); max-width: 10ch; }
h2 { margin: 0 0 1rem; font-size: clamp(2.1rem, 4.5vw, 4.1rem); }
h3 { margin: 0 0 .55rem; font-size: 1.55rem; }
.lead { max-width: 63ch; margin: 0 0 1.7rem; color: #40534c; font-size: clamp(1.05rem, 1.8vw, 1.28rem); }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: .55rem; min-height: 48px; padding: .78rem 1.15rem; border: 2px solid var(--forest); border-radius: 999px; background: var(--forest); color: var(--paper); font-weight: 800; text-decoration: none; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); box-shadow: 0 8px 0 rgba(23,72,59,.13); }
.button.secondary { color: var(--forest); background: transparent; }
.hero-visual { position: relative; min-height: 540px; }
.hero-photo { position: absolute; inset: 0 3% 5% 3%; overflow: hidden; border-radius: 46% 54% 42% 58% / 53% 43% 57% 47%; transform: rotate(2deg); box-shadow: var(--shadow); background: var(--forest); }
.hero-photo img { width: 100%; height: 112%; object-fit: cover; transform: translate3d(0, var(--parallax-y, -4%), 0) scale(1.05) rotate(-2deg); transform-origin: center; will-change: transform; }
.hero-photo::after { content: ""; position: absolute; inset: 0; background: linear-gradient(20deg, rgba(14,56,46,.42), transparent 58%); }
.route-note { position: absolute; right: 0; bottom: 2%; max-width: 240px; padding: 1rem 1.1rem; background: var(--paper); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); transform: rotate(-3deg); font-weight: 750; animation: note-float 4.6s ease-in-out infinite; }
.route-note b { color: var(--coral); }
.sun-disc { position: absolute; width: 150px; height: 150px; top: -25px; right: -25px; border-radius: 50%; background: var(--sun); z-index: -1; animation: sun-breathe 6s ease-in-out infinite; }

.section { padding: clamp(4rem, 8vw, 7rem) 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 2rem; }
.section-head h2 { max-width: 12ch; }
.section-head p { max-width: 50ch; color: var(--muted); }
.paper-section { background: rgba(255,253,247,.72); border-block: 1px solid var(--line); }
.dark-section { color: var(--paper); background: var(--forest); }
.dark-section .eyebrow, .dark-section .muted { color: var(--mint); }
.dark-section .eyebrow::before { background: var(--sun); }

.featured-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 1.2rem; }
.card { position: relative; overflow: hidden; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 12px 34px rgba(23,48,42,.07); transition: transform .35s cubic-bezier(.2,.8,.2,1), box-shadow .35s ease, border-color .35s ease; }
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.card::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(115deg, transparent 35%, rgba(255,255,255,.5) 48%, transparent 61%); transform: translateX(-130%); transition: transform .75s ease; }
.card:hover::after { transform: translateX(130%); }
.card-media { position: relative; aspect-ratio: 16/9; overflow: hidden; background: #cad8d0; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.card:hover .card-media img { transform: scale(1.025); }
.card-body { padding: 1.25rem 1.35rem 1.45rem; }
.card-body p { color: var(--muted); }
.meta { display: flex; flex-wrap: wrap; gap: .65rem; margin-bottom: .75rem; color: var(--muted); font-size: .78rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.tag { display: inline-flex; padding: .26rem .58rem; border-radius: 999px; color: var(--forest); background: #dcebe3; }
.card-link { font-weight: 900; color: var(--forest); text-underline-offset: 4px; }
.side-stack { display: grid; gap: 1.2rem; }
.side-stack .card { display: grid; grid-template-columns: 38% 62%; }
.side-stack .card-media { aspect-ratio: auto; min-height: 180px; }

.video-shell { position: relative; aspect-ratio: 16/9; min-height: 200px; overflow: hidden; background: #10251f; border-radius: var(--radius); box-shadow: var(--shadow); }
.video-shell img { width: 100%; height: 100%; object-fit: cover; opacity: .82; }
.video-shell .video-play { position: absolute; inset: 0; margin: auto; width: 82px; height: 82px; border: 0; border-radius: 50%; color: var(--forest); background: var(--sun); font-size: 1.65rem; cursor: pointer; box-shadow: 0 0 0 12px rgba(255,255,255,.22); transition: transform .2s ease; animation: play-pulse 2.6s ease-in-out infinite; }
.video-shell .video-play:hover { transform: scale(1.08); }
.video-shell iframe { width: 100%; height: 100%; border: 0; }
.video-caption { margin-top: .75rem; color: var(--muted); font-size: .9rem; }
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.video-card .video-shell { border-radius: 18px 18px 0 0; box-shadow: none; }
.video-card .video-play { width: 60px; height: 60px; font-size: 1.2rem; }
.video-card h3 { display: -webkit-box; overflow: hidden; -webkit-box-orient: vertical; -webkit-line-clamp: 3; font-size: 1.28rem; }
.library-toolbar { display: grid; grid-template-columns: minmax(240px, 360px) 1fr; align-items: end; gap: 1.25rem 2rem; margin-bottom: 2rem; padding: 1.3rem; background: var(--paper); border: 1px solid var(--line); border-radius: 20px; box-shadow: 0 10px 28px rgba(23,48,42,.06); }
.video-search { display: grid; gap: .45rem; color: var(--forest); font-weight: 850; }
.video-search input { width: 100%; min-height: 48px; padding: .72rem 1rem; color: var(--ink); background: #fff; border: 1px solid var(--line); border-radius: 12px; }
.filter-buttons { display: flex; flex-wrap: wrap; gap: .55rem; }
.filter-button { min-height: 42px; padding: .55rem .88rem; color: var(--forest); background: transparent; border: 1px solid var(--line); border-radius: 999px; font-weight: 800; cursor: pointer; transition: color .2s ease, background .2s ease, transform .2s ease; }
.filter-button:hover { transform: translateY(-1px); border-color: var(--forest); }
.filter-button.active { color: var(--paper); background: var(--forest); border-color: var(--forest); }
.video-count { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: .9rem; font-weight: 800; }
.video-empty { grid-column: 1 / -1; margin: 0; padding: 2rem; text-align: center; color: var(--muted); background: var(--paper); border: 1px dashed var(--line); border-radius: 18px; }

.calculator-hero { padding-bottom: 4.5rem; }
.calculator-hero h1 { max-width: 12ch; }
.calculator-layout { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(290px, .7fr); gap: 1.4rem; align-items: start; }
.calculator-panel { overflow: hidden; background: var(--paper); border: 1px solid var(--line); border-radius: 28px; box-shadow: var(--shadow); }
.calculator-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: end; padding: clamp(1.4rem, 4vw, 2.5rem); color: var(--paper); background: var(--forest); }
.calculator-intro h2 { margin: 0; font-size: clamp(2rem, 4vw, 3.2rem); }
.calculator-intro p { margin: 0; color: #cfe0d7; }
.calculator-intro .eyebrow { color: var(--mint); }
.calculator-panel form { padding: clamp(1rem, 3vw, 2rem); }
.energy-table-head, .energy-row { display: grid; grid-template-columns: minmax(140px, 1.5fr) .7fr .8fr .55fr .8fr 38px; gap: .65rem; align-items: end; }
.energy-table-head { padding: 0 .25rem .55rem; color: var(--muted); font-size: .72rem; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.energy-row { padding: .75rem 0; border-top: 1px solid var(--line); }
.energy-row label { display: grid; gap: .25rem; }
.energy-row label > span { display: none; color: var(--muted); font-size: .75rem; font-weight: 800; }
.energy-row input, .calculator-settings input, .calculator-settings select { width: 100%; min-width: 0; min-height: 44px; padding: .62rem .7rem; color: var(--ink); background: #fff; border: 1px solid var(--line); border-radius: 10px; }
.energy-row [data-row-energy] { align-self: center; color: var(--forest); font-size: .88rem; text-align: right; white-space: nowrap; }
.remove-device { align-self: center; width: 34px; height: 34px; color: #8c3b29; background: #fff2ed; border: 0; border-radius: 50%; font-size: 1.35rem; cursor: pointer; }
.add-device { margin: 1rem 0 1.5rem; padding: .55rem .85rem; color: var(--forest); background: #e8f0eb; border: 0; border-radius: 999px; font-weight: 850; cursor: pointer; }
.calculator-settings { display: grid; grid-template-columns: repeat(4, 1fr); gap: .8rem; margin: 0 0 1.3rem; padding: 1.1rem; background: #f4f0e6; border: 0; border-radius: 16px; }
.calculator-settings legend { padding: 0 .35rem; color: var(--forest); font-weight: 900; }
.calculator-settings label { display: grid; gap: .35rem; color: var(--muted); font-size: .78rem; font-weight: 800; }
.calculate-button { width: 100%; }
.calculator-results { position: sticky; top: 94px; overflow: hidden; padding: 1.5rem; color: var(--paper); background: var(--forest-2); border-radius: 28px; box-shadow: var(--shadow); }
.calculator-results h2 { font-size: 2.4rem; }
.calculator-results .eyebrow { color: var(--mint); }
.result-list { display: grid; gap: .7rem; }
.result-list > div { padding: 1rem; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.12); border-radius: 15px; }
.result-list span { display: block; color: #bcd0c5; font-size: .78rem; }
.result-list strong { display: block; margin-top: .2rem; color: var(--sun); font: 700 clamp(1.55rem, 3vw, 2.25rem) Georgia, serif; }
.result-note { margin: 1rem 0 0; color: #bcd0c5; font-size: .8rem; }

.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; overflow: hidden; border: 1px solid rgba(255,255,255,.18); border-radius: var(--radius); background: rgba(255,255,255,.18); }
.pillar { padding: 2rem; background: var(--forest); }
.pillar .number { display: block; margin-bottom: 2rem; color: var(--sun); font: 700 2.2rem Georgia, serif; }
.pillar p { color: #cfe0d7; }

.page-hero { padding: clamp(3.5rem, 8vw, 7rem) 0 3rem; }
.page-hero h1 { max-width: 13ch; }
.crumbs { display: flex; gap: .5rem; margin-bottom: 1rem; color: var(--muted); font-size: .9rem; }
.content-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: clamp(2rem, 6vw, 5rem); align-items: start; }
.prose { font-size: 1.05rem; }
.prose h2 { margin-top: 2.7rem; font-size: clamp(1.8rem, 3.8vw, 2.7rem); }
.prose h3 { margin-top: 2rem; }
.prose p, .prose li { color: #354940; }
.prose a { color: #a4432c; text-underline-offset: 3px; }
.prose img { margin: 2rem 0; border-radius: var(--radius); }
.prose blockquote { margin: 2rem 0; padding: 1.2rem 1.5rem; border-left: 5px solid var(--sun); background: var(--paper); border-radius: 0 14px 14px 0; font-family: Georgia, serif; font-size: 1.25rem; }
.notice { padding: 1rem 1.2rem; background: #fff6dd; border: 1px solid #ecd797; border-radius: 14px; }
.sidebar { position: sticky; top: 106px; }
.sidebar-box { margin-bottom: 1rem; padding: 1.3rem; background: var(--paper); border: 1px solid var(--line); border-radius: 16px; }
.sidebar-box h3 { font-size: 1.25rem; }
.sidebar-box ul { margin: .7rem 0 0; padding-left: 1.15rem; }

.about-grid, .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 7vw, 6rem); align-items: center; }
.portrait-stack { position: relative; padding: 2rem 2rem 0 0; }
.portrait-stack img { border-radius: 38% 62% 58% 42% / 48% 44% 56% 52%; box-shadow: var(--shadow); }
.portrait-stack::before { content: ""; position: absolute; top: 0; right: 0; width: 68%; height: 68%; border: 3px solid var(--sun); border-radius: 50%; z-index: -1; }
.fact-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: .8rem; margin-top: 1.5rem; }
.fact { padding: 1rem; background: rgba(255,255,255,.55); border: 1px solid var(--line); border-radius: 14px; }
.fact b { display: block; font: 700 1.5rem Georgia, serif; color: var(--forest); }
.contact-card { padding: clamp(1.5rem, 4vw, 3rem); color: var(--paper); background: var(--forest); border-radius: var(--radius); box-shadow: var(--shadow); }
.contact-card a { color: var(--sun); }

.cta-band { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; padding: clamp(2rem, 5vw, 4rem); color: var(--paper); background: var(--forest); border-radius: 28px; box-shadow: var(--shadow); }
.cta-band h2 { margin: 0; max-width: 15ch; font-size: clamp(2rem, 4vw, 3.6rem); }
.cta-band .button { color: var(--forest); background: var(--sun); border-color: var(--sun); }
.tool-cta { background: linear-gradient(125deg, var(--forest-2), var(--forest)); }
.tool-cta h2 { max-width: 18ch; }
.tool-cta p { max-width: 58ch; margin-bottom: 0; color: #cfe0d7; }
.tool-cta .eyebrow { color: var(--mint); }

.site-footer { margin-top: 5rem; padding: 4rem 0 2rem; color: #d8e5de; background: var(--forest-2); }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 2rem; }
.site-footer .brand { color: white; }
.site-footer .brand-logo { width: 80px; height: 80px; filter: drop-shadow(0 8px 14px rgba(0,0,0,.25)); }
.site-footer .brand-copy strong { font-size: 1.2rem; }
.site-footer .brand small { color: var(--mint); }
.site-footer h3 { color: white; font: 800 .82rem "Avenir Next", sans-serif; letter-spacing: .1em; text-transform: uppercase; }
.site-footer ul { margin: 0; padding: 0; list-style: none; }
.site-footer li { margin: .45rem 0; }
.site-footer a { color: #d8e5de; text-decoration: none; }
.site-footer a:hover { color: var(--sun); }
.site-footer .button.secondary { color: var(--mint); border-color: var(--mint); }
.site-footer .button.secondary:hover { color: var(--forest-2); background: var(--mint); }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; margin-top: 3rem; padding-top: 1.3rem; border-top: 1px solid rgba(255,255,255,.15); color: #9eb8aa; font-size: .84rem; }

.motion-enabled .reveal, .motion-enabled .motion-item { opacity: 0; transform: translateY(26px); transition: opacity .75s cubic-bezier(.2,.8,.2,1), transform .75s cubic-bezier(.2,.8,.2,1); transition-delay: var(--motion-delay, 0ms); }
.motion-enabled .reveal.visible, .motion-enabled .motion-item.visible { opacity: 1; transform: none; }
.motion-item[data-motion="left"] { transform: translateX(-28px); }
.motion-item[data-motion="right"] { transform: translateX(28px); }
.motion-item.visible[data-motion] { transform: none; }

@keyframes note-float {
  0%, 100% { transform: rotate(-3deg) translateY(0); }
  50% { transform: rotate(-1.5deg) translateY(-7px); }
}
@media print {
  .reveal, .motion-item, .motion-enabled .reveal, .motion-enabled .motion-item { opacity: 1; transform: none; }
  .site-header, .site-footer { display: none; }
}
@keyframes sun-breathe {
  0%, 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(245,165,36,0); }
  50% { transform: scale(1.07); box-shadow: 0 0 0 18px rgba(245,165,36,.08); }
}
@keyframes play-pulse {
  0%, 100% { box-shadow: 0 0 0 10px rgba(255,255,255,.2); }
  50% { box-shadow: 0 0 0 18px rgba(255,255,255,.08); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto!important; animation: none!important; transition: none!important; }
  .reveal, .motion-item { opacity: 1; transform: none; }
}
@media (max-width: 1100px) {
  .menu-button { display: grid; place-items: center; }
  .nav-links { display: none; position: absolute; top: 74px; left: 0; right: 0; margin: 0; padding: 1.2rem; flex-direction: column; align-items: stretch; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: .55rem .8rem; }
  .hero-grid, .featured-grid, .about-grid, .contact-grid, .content-grid { grid-template-columns: 1fr; }
  .hero-visual { min-height: 440px; }
  .side-stack { grid-template-columns: 1fr 1fr; }
  .side-stack .card { display: block; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .sidebar { position: static; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
  .calculator-layout { grid-template-columns: 1fr; }
  .calculator-results { position: static; }
  .calculator-settings { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 650px) {
  .nav { min-height: 64px; }
  .brand { gap: .45rem; }
  .brand-logo { width: 46px; height: 46px; }
  .brand-copy strong { font-size: .92rem; }
  .brand small { font-size: .57rem; letter-spacing: .12em; }
  .nav-links { top: 64px; }
  h1 { font-size: clamp(2.75rem, 16vw, 4.2rem); }
  .hero { padding-top: 3.5rem; }
  .hero-visual { min-height: 350px; }
  .hero-photo { inset: 0 0 4%; }
  .route-note { right: .3rem; font-size: .83rem; max-width: 190px; }
  .section-head { align-items: start; flex-direction: column; }
  .side-stack, .video-grid, .pillars, .fact-list { grid-template-columns: 1fr; }
  .library-toolbar { grid-template-columns: 1fr; padding: 1rem; }
  .video-count { grid-column: auto; }
  .side-stack .card { display: grid; grid-template-columns: 38% 62%; }
  .cta-band { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; }
  .calculator-intro { grid-template-columns: 1fr; gap: .8rem; }
  .energy-table-head { display: none; }
  .energy-row { grid-template-columns: 1fr 1fr 1fr; padding: 1rem 0; }
  .energy-row label:first-child { grid-column: 1 / -1; }
  .energy-row label > span { display: block; }
  .energy-row [data-row-energy] { text-align: left; }
  .calculator-settings { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .nav { gap: .5rem; }
  .brand-logo { width: 40px; height: 40px; }
  .brand-copy strong { font-size: .78rem; }
  .brand small { font-size: .5rem; }
  .nav-actions { gap: .2rem; }
  .menu-button { width: 38px; }
}