/* ==========================================================================
   BESST Energy — besst.es
   Implements BE-BDS-2026 v1.0 (Quiet Grid + Charged Horizon covers).
   Tokens first (ch. 14.1): nothing below hard-codes a brand value twice.
   ========================================================================== */

@font-face { font-family: "Inter"; font-weight: 400; font-display: swap; src: url("../fonts/inter-400.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 500; font-display: swap; src: url("../fonts/inter-500.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 600; font-display: swap; src: url("../fonts/inter-600.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 700; font-display: swap; src: url("../fonts/inter-700.woff2") format("woff2"); }
@font-face { font-family: "Source Serif 4"; font-weight: 400; font-display: swap; src: url("../fonts/sourceserif-400.woff2") format("woff2"); }
@font-face { font-family: "Source Serif 4"; font-weight: 400; font-style: italic; font-display: swap; src: url("../fonts/sourceserif-400i.woff2") format("woff2"); }
@font-face { font-family: "Source Serif 4"; font-weight: 600; font-display: swap; src: url("../fonts/sourceserif-600.woff2") format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-weight: 400; font-display: swap; src: url("../fonts/jbmono-400.woff2") format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-weight: 500; font-display: swap; src: url("../fonts/jbmono-500.woff2") format("woff2"); }
@font-face { font-family: "Playfair Display"; font-weight: 600; font-display: swap; src: url("../fonts/playfair-600.woff2") format("woff2"); }

:root {
  /* color — brand (4.2) */
  --indigo: #221748; --indigo-900: #16102F; --indigo-700: #37296B; --indigo-500: #6353AE;
  --indigo-100: #E9E6F4; --indigo-50: #F4F2FA;
  --volt: #92D148; --volt-deep: #4C8A1F; --volt-050: #EFF8E1;
  /* color — neutrals (4.3) */
  --white: #FFFFFF; --n25: #FAFAF9; --n50: #F5F5F3; --n100: #EBEBE8; --n200: #D9D9D4;
  --n300: #B8B8B1; --n400: #92928B; --n500: #6E6E67; --n600: #52524C; --n700: #3B3B36; --n900: #17171A;
  /* color — night (4.5) */
  --dk-bg: #120D26; --dk-surface: #1B1440; --dk-elev: #251A52; --dk-line: #2E2360;
  --dk-hi: #F2F0FA; --dk-body: #C5BFDE; --dk-dim: #8B81B8;
  --success: #2E9E57; --error: #D64545;
  /* type (5.x, 16.1) */
  --sans: "Inter", -apple-system, "Helvetica Neue", Arial, sans-serif;
  --serif: "Source Serif 4", Georgia, serif;
  --display: "Playfair Display", Georgia, serif;
  --mono: "JetBrains Mono", Consolas, "Courier New", monospace;
  /* space (6.2) */
  --s1: 4px; --s2: 8px; --s3: 16px; --s4: 24px; --s5: 40px; --s6: 64px; --s7: 104px;
  --radius-in: 4px; --radius: 6px; --radius-lg: 10px;
  --hairline: 1px solid var(--n200);
  --max: 1200px; --read: 720px;
  --ease: cubic-bezier(.2, 0, 0, 1);
  --shadow: 0 1px 2px rgba(22, 16, 47, .06), 0 8px 24px rgba(22, 16, 47, .06);
  --shadow-hover: 0 2px 4px rgba(22, 16, 47, .08), 0 16px 40px rgba(22, 16, 47, .10);
  --header-h: 72px;
}

/* ---------- reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0; background: var(--white); color: var(--n700);
  font: 400 16px/1.5 var(--sans); font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
img, svg, video { display: block; max-width: 100%; }
a { color: var(--indigo-500); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
h1, h2, h3, h4 { color: var(--indigo); margin: 0; font-weight: 700; text-wrap: balance; }
p { margin: 0 0 var(--s3); text-wrap: pretty; }
:focus-visible { outline: 2px solid var(--volt); outline-offset: 1px; border-radius: 2px; }
.sr-only { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--indigo); color: #fff; padding: 8px 16px; z-index: 100; border-radius: var(--radius); }
.skip:focus { left: 8px; }

/* ---------- layout ---------- */
.wrap { width: 100%; max-width: calc(var(--max) + 2 * 64px); margin: 0 auto; padding: 0 64px; }
.section { padding: var(--s7) 0; }
.section--tight { padding: var(--s6) 0; }
.section--cloud { background: var(--n25); }
.section--mist { background: var(--n50); }
.section--tint { background: var(--indigo-50); }
.section + .section:not([class*="--"]) { border-top: var(--hairline); }
.grid { display: grid; gap: var(--s4); grid-template-columns: repeat(12, 1fr); }
.g-2 { display: grid; gap: var(--s5); grid-template-columns: 1fr 1fr; align-items: center; }
.g-2--top { align-items: start; }
.g-3 { display: grid; gap: var(--s4); grid-template-columns: repeat(3, 1fr); }
.g-4 { display: grid; gap: var(--s4); grid-template-columns: repeat(4, 1fr); }
.g-84 { display: grid; gap: var(--s6); grid-template-columns: 8fr 4fr; align-items: start; }
.g-57 { display: grid; gap: var(--s6); grid-template-columns: 5fr 7fr; align-items: start; }

/* ---------- type ---------- */
.kicker {
  display: inline-flex; align-items: center; gap: 12px; margin: 0 0 var(--s3);
  font: 700 12px/1.2 var(--sans); letter-spacing: .22em; text-transform: uppercase; color: var(--indigo);
}
.kicker::before { content: ""; width: 24px; height: 3px; background: var(--volt); border-radius: 2px; flex: none; }
.display { font-size: clamp(40px, 6vw, 68px); line-height: 1.04; letter-spacing: -.03em; font-weight: 700; }
.h1 { font-size: clamp(32px, 4.2vw, 50px); line-height: 1.08; letter-spacing: -.025em; }
.h2 { font-size: clamp(26px, 3vw, 38px); line-height: 1.12; letter-spacing: -.022em; }
.h3 { font-size: 21px; line-height: 1.25; letter-spacing: -.012em; }
.h4 { font-size: 16px; line-height: 1.35; }
.lede { font-size: clamp(18px, 1.6vw, 21px); line-height: 1.55; color: var(--n500); max-width: 62ch; }
.muted { color: var(--n500); }
.small { font-size: 14px; line-height: 1.5; }
.caption { font-size: 12px; line-height: 1.45; color: var(--n400); font-weight: 500; }
.mono { font-family: var(--mono); font-feature-settings: "tnum"; }
.serif { font-family: var(--serif); }
.statement { font-family: var(--display); font-weight: 600; font-size: clamp(34px, 4.6vw, 58px); line-height: 1.1; letter-spacing: -.01em; color: var(--indigo); }
.head { max-width: 760px; margin-bottom: var(--s6); }
.head--center { margin-left: auto; margin-right: auto; text-align: center; }
.head--center .kicker { justify-content: center; }
.head .lede { margin-top: var(--s3); }
.prose { max-width: var(--read); }
.prose h2 { font-size: 26px; letter-spacing: -.02em; margin: var(--s6) 0 var(--s3); }
.prose h3 { font-size: 19px; margin: var(--s5) 0 var(--s2); }
.prose p, .prose li { color: var(--n700); }
.prose ul { padding-left: 20px; margin: 0 0 var(--s3); }
.prose li { margin-bottom: var(--s2); }
.prose table { width: 100%; border-collapse: collapse; margin: var(--s3) 0 var(--s4); font-size: 14px; }
.prose th, .prose td { text-align: left; padding: 10px 12px; border-bottom: var(--hairline); vertical-align: top; }
.prose th { font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--n500); }

/* ---------- buttons (16.2) ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 0 24px; border-radius: var(--radius); border: 1px solid transparent;
  font: 600 15px/1 var(--sans); letter-spacing: -.005em; cursor: pointer; text-decoration: none !important;
  transition: background-color .14s ease-out, border-color .14s ease-out, color .14s ease-out, transform .14s ease-out;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--indigo); color: #fff; }
.btn--primary:hover { background: var(--indigo-700); }
.btn--volt { background: var(--volt); color: var(--indigo-900); }
.btn--volt:hover { background: #A3DB60; }
.btn--secondary { background: #fff; color: var(--indigo); border-color: var(--n200); }
.btn--secondary:hover { border-color: var(--indigo); }
.btn--ghost-dk { background: transparent; color: var(--dk-hi); border-color: var(--dk-line); }
.btn--ghost-dk:hover { border-color: var(--dk-dim); }
.btn--sm { min-height: 40px; padding: 0 16px; font-size: 14px; }
.btn--block { width: 100%; }
.link-arrow { font-weight: 600; color: var(--indigo); display: inline-flex; align-items: center; gap: 8px; }
.link-arrow::after { content: "→"; transition: transform .15s ease-out; }
.link-arrow:hover { text-decoration: none; }
.link-arrow:hover::after { transform: translateX(3px); }
.actions { display: flex; flex-wrap: wrap; gap: var(--s3); align-items: center; margin-top: var(--s5); }

/* ---------- header / nav (16.4) ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50; height: var(--header-h);
  background: rgba(255, 255, 255, .86); backdrop-filter: saturate(160%) blur(14px); -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent; transition: height .2s var(--ease), border-color .2s var(--ease);
}
.site-header.is-condensed { --header-h: 56px; border-bottom-color: var(--n100); }
.site-header .wrap { height: 100%; display: flex; align-items: center; gap: var(--s5); }
.brand { display: flex; align-items: center; flex: none; }
.brand img { height: 34px; width: auto; transition: height .2s var(--ease); }
.is-condensed .brand img { height: 28px; }
.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav a {
  position: relative; padding: 8px 12px; color: var(--n700); font-size: 15px; font-weight: 500; border-radius: var(--radius-in);
}
.nav a:hover { color: var(--indigo); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--indigo); font-weight: 600; }
.nav a[aria-current="page"]::after { content: ""; position: absolute; left: 12px; right: 12px; bottom: -2px; height: 3px; border-radius: 2px; background: var(--volt); }
.header-cta { margin-left: var(--s3); }
.nav-toggle { display: none; margin-left: auto; background: none; border: 0; width: 44px; height: 44px; border-radius: var(--radius); cursor: pointer; color: var(--indigo); }
.nav-toggle svg { margin: auto; }

/* dark header variant over hero */
.site-header--dark:not(.is-condensed) { background: transparent; backdrop-filter: none; -webkit-backdrop-filter: none; }
.site-header--dark:not(.is-condensed) .nav a { color: var(--dk-body); }
.site-header--dark:not(.is-condensed) .nav a:hover,
.site-header--dark:not(.is-condensed) .nav a[aria-current="page"] { color: #fff; }
.site-header--dark:not(.is-condensed) .nav-toggle { color: #fff; }
.site-header--dark .brand .logo-rev { display: none; }
.site-header--dark:not(.is-condensed) .brand .logo-rev { display: block; }
.site-header--dark:not(.is-condensed) .brand .logo-pri { display: none; }
.site-header:not(.site-header--dark) .brand .logo-rev { display: none; }
.has-dark-hero main { margin-top: calc(-1 * var(--header-h)); }

/* ---------- hero (cover: Indigo Depth + grid artwork) ---------- */
.hero {
  position: relative; overflow: hidden; color: var(--dk-body);
  background: linear-gradient(160deg, var(--indigo-900) 0%, #120C29 55%, var(--indigo-700) 140%);
  padding: calc(var(--header-h) + 96px) 0 var(--s7);
}
.hero__art { position: absolute; inset: 0; pointer-events: none; }
.hero__art img, .hero__art video { position: absolute; right: -6%; top: 50%; transform: translateY(-50%); width: min(62vw, 980px); height: auto; opacity: .9;
  -webkit-mask-image: radial-gradient(closest-side, #000 72%, transparent 100%); mask-image: radial-gradient(closest-side, #000 72%, transparent 100%); }
.hero__art picture { display: contents; }
.hero__art::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, var(--indigo-900) 18%, rgba(22, 16, 47, .55) 52%, rgba(22, 16, 47, 0) 80%); }
.hero__art--photo img, .hero__art--photo video { inset: 0; right: 0; top: 0; transform: none; width: 100%; height: 100%; object-fit: cover; opacity: .55; -webkit-mask-image: none; mask-image: none; }
.hero__art--photo::after { background: linear-gradient(90deg, var(--indigo-900) 22%, rgba(22, 16, 47, .7) 55%, rgba(22, 16, 47, .35) 100%), linear-gradient(0deg, var(--indigo-900) 0%, rgba(22, 16, 47, 0) 30%); }
.hero .wrap { position: relative; }
.hero__inner { max-width: 720px; }
.hero h1 { color: var(--dk-hi); }
.hero .kicker { color: var(--dk-hi); }
.hero .lede { color: var(--dk-body); margin-top: var(--s4); }
.hero--sub { padding: calc(var(--header-h) + 72px) 0 var(--s6); }
.hero-stats { display: grid; grid-template-columns: repeat(3, auto); gap: var(--s6); margin-top: var(--s6); padding-top: var(--s4); border-top: 1px solid var(--dk-line); width: fit-content; }
.hero-stat__v { font: 500 clamp(28px, 3vw, 38px)/1 var(--mono); color: var(--dk-hi); letter-spacing: -.02em; }
.hero-stat__v em { font-style: normal; color: var(--volt); }
.hero-stat__l { font-size: 13px; color: var(--dk-dim); margin-top: 8px; max-width: 22ch; }

/* ---------- cards (6.5 ladder: plain → tint → border → indigo) ---------- */
.card {
  position: relative; background: #fff; border: var(--hairline); border-radius: var(--radius);
  padding: var(--s5) var(--s4); display: flex; flex-direction: column;
  transition: transform .15s ease-out, box-shadow .15s ease-out, border-color .15s ease-out;
}
.card--tint { background: var(--n50); border-color: transparent; }
.card--indigo { background: var(--indigo); border-color: var(--indigo); color: var(--dk-body); }
.card--indigo h3, .card--indigo .h3 { color: #fff; }
.card--link:hover { transform: translateY(-1px); box-shadow: var(--shadow-hover); border-color: var(--n300); text-decoration: none; }
.card .icon { margin-bottom: var(--s4); }
.card h3 { margin-bottom: var(--s2); }
.card p { color: var(--n500); margin-bottom: var(--s3); }
.card--indigo p { color: var(--dk-body); }
.card .link-arrow { margin-top: auto; }
.card__meta { font: 500 12px/1.3 var(--mono); color: var(--n400); letter-spacing: .02em; margin-bottom: var(--s3); }
.card--audience { padding: 0; overflow: hidden; }
.card--audience .card__media { aspect-ratio: 16/10; }
.card--audience .card__body { padding: var(--s4); display: flex; flex-direction: column; flex: 1; }

/* icon: Lucide-style 1.5px stroke, rounded, frontal (7.1) */
.icon { width: 40px; height: 40px; border-radius: var(--radius); background: var(--indigo-50); display: grid; place-items: center; color: var(--indigo); flex: none; }
.icon svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.icon--volt { background: var(--volt-050); color: var(--volt-deep); }
.icon--dk { background: var(--dk-elev); color: var(--volt); }

/* ---------- media (photo slots; Indigo Depth fallback until imagery lands) ---------- */
.media {
  position: relative; overflow: hidden; border-radius: var(--radius-lg); background:
    radial-gradient(120% 90% at 85% 10%, rgba(99, 83, 174, .45), transparent 60%),
    linear-gradient(160deg, var(--indigo-900), var(--indigo-700));
  aspect-ratio: 4/3; margin: 0;
}
.media picture { display: block; position: relative; width: 100%; height: 100%; }
.media::before {
  content: ""; position: absolute; inset: 0; opacity: .35;
  background-image: linear-gradient(var(--dk-line) 1px, transparent 1px), linear-gradient(90deg, var(--dk-line) 1px, transparent 1px);
  background-size: 32px 32px;
}
.media img, .media video { position: relative; width: 100%; height: 100%; object-fit: cover; }
.media figcaption, .media__cap {
  position: absolute; left: 12px; bottom: 12px; z-index: 2; padding: 6px 10px; border-radius: var(--radius-in);
  background: rgba(22, 16, 47, .72); color: var(--dk-hi); font: 500 11px/1.3 var(--mono); letter-spacing: .02em;
  backdrop-filter: blur(6px);
}
.media--wide { aspect-ratio: 16/9; }
.media--tall { aspect-ratio: 4/5; }
.card__media.media { border-radius: 0; }

/* ---------- problem / solution rows ---------- */
.issue { display: grid; grid-template-columns: 56px 1fr; gap: var(--s4); padding: var(--s5) 0; border-top: var(--hairline); }
.issue:last-child { border-bottom: var(--hairline); }
.issue__n { font: 500 14px/1 var(--mono); color: var(--n400); padding-top: 6px; }
.issue__body { display: grid; grid-template-columns: 5fr 7fr; gap: var(--s5); }
.issue h3 { font-size: 22px; letter-spacing: -.015em; }
.issue .problem { color: var(--n500); margin-top: var(--s2); font-size: 15px; }
.issue .answer p { margin-bottom: var(--s2); }
.tag { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px; font: 600 11px/1.4 var(--sans); letter-spacing: .06em; text-transform: uppercase; background: var(--indigo-50); color: var(--indigo); }
.tag--volt { background: var(--volt-050); color: var(--volt-deep); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: var(--s3); }

/* ---------- checklist ---------- */
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.checks li { position: relative; padding-left: 30px; }
.checks li::before {
  content: ""; position: absolute; left: 0; top: 3px; width: 18px; height: 18px; border-radius: 50%;
  background: var(--volt-050) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234C8A1F' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5 9-10'/%3E%3C/svg%3E") center/11px no-repeat;
}
.dk .checks li::before { background-color: var(--dk-elev); }

/* ---------- dark band ---------- */
.dk { background: var(--indigo-900); color: var(--dk-body); }
.dk h2, .dk h3, .dk .h2, .dk .h3 { color: var(--dk-hi); }
.dk .kicker { color: var(--dk-hi); }
.dk .lede, .dk .muted { color: var(--dk-body); }
.dk .card { background: var(--dk-surface); border-color: var(--dk-line); }
.dk .card p { color: var(--dk-body); }
.dk .card h3 { color: var(--dk-hi); }
.dk .caption { color: var(--dk-dim); }
.dk .statement { color: var(--dk-hi); }
.dk .issue { border-color: var(--dk-line); }

/* ---------- value chain / steps ---------- */
.chain { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border: var(--hairline); border-radius: var(--radius); background: #fff; }
.chain__step { padding: var(--s5) var(--s4); border-right: var(--hairline); position: relative; }
.chain__step:last-child { border-right: 0; }
.chain__n { font: 500 12px/1 var(--mono); color: var(--n400); }
.chain__step h3 { font-size: 19px; margin: var(--s3) 0 var(--s2); }
.chain__step p { color: var(--n500); font-size: 15px; margin: 0; }
.chain__bar { position: absolute; left: 0; right: 0; top: -1px; height: 3px; background: var(--n100); }
.chain__bar span { display: block; height: 100%; background: var(--volt); width: 0; transition: width .8s var(--ease); }
.is-in .chain__bar span { width: 100%; }
.chain__step:nth-child(2) .chain__bar span { transition-delay: .2s; }
.chain__step:nth-child(3) .chain__bar span { transition-delay: .4s; }
.chain__step:nth-child(4) .chain__bar span { transition-delay: .6s; }

/* ---------- metrics ---------- */
.metric { padding-top: var(--s3); border-top: 2px solid var(--indigo); }
.metric__v { font: 500 clamp(30px, 3.4vw, 44px)/1 var(--mono); color: var(--indigo); letter-spacing: -.03em; }
.metric__v small { font-size: .45em; color: var(--n500); letter-spacing: 0; margin-left: 4px; }
.metric__l { margin-top: var(--s2); color: var(--n500); font-size: 14px; max-width: 26ch; }
.dk .metric { border-top-color: var(--volt); }
.dk .metric__v { color: var(--dk-hi); }
.dk .metric__l { color: var(--dk-dim); }

/* ---------- compare / model table ---------- */
.table-wrap { overflow-x: auto; border: var(--hairline); border-radius: var(--radius); background: #fff; }
.table { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 640px; }
.table th, .table td { padding: 16px 20px; text-align: left; border-bottom: var(--hairline); vertical-align: top; }
.table thead th { font: 600 12px/1.3 var(--sans); letter-spacing: .1em; text-transform: uppercase; color: var(--n500); background: var(--n25); }
.table tbody tr:last-child td { border-bottom: 0; }
.table td:first-child { color: var(--indigo); font-weight: 600; }
.table .hl { background: var(--indigo-50); }
.table .yes { color: var(--volt-deep); font-weight: 600; }

/* ---------- energy flow diagram ---------- */
.flow { width: 100%; height: auto; }
.flow .ln { fill: none; stroke: var(--dk-line); stroke-width: 2; }
.flow .ln-live { fill: none; stroke: var(--volt); stroke-width: 2; stroke-dasharray: 2 14; stroke-linecap: round; animation: flow 1.6s linear infinite; }
.flow .node { fill: var(--dk-surface); stroke: var(--dk-line); stroke-width: 1.5; }
.flow .node-hi { fill: var(--dk-elev); stroke: var(--volt); stroke-width: 1.5; }
.flow .lbl { font: 600 13px var(--sans); fill: var(--dk-hi); }
.flow .sub { font: 400 11px var(--mono); fill: var(--dk-dim); }
.flow .ico { fill: none; stroke: var(--volt); stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
@keyframes flow { to { stroke-dashoffset: -32; } }

/* ---------- calculators ---------- */
.calc { display: grid; grid-template-columns: 5fr 7fr; border-radius: var(--radius-lg); overflow: hidden; border: var(--hairline); background: #fff; box-shadow: var(--shadow); }
.calc__in { padding: var(--s5); border-right: var(--hairline); }
.calc__out { padding: var(--s5); background: var(--indigo-900); color: var(--dk-body); display: flex; flex-direction: column; }
.calc__hero { font: 500 clamp(40px, 5vw, 60px)/1 var(--mono); color: var(--dk-hi); letter-spacing: -.03em; margin: var(--s2) 0; }
.calc__hero em { font-style: normal; color: var(--volt); }
.calc__range { color: var(--dk-dim); font: 400 14px var(--mono); }
.calc__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s3); margin: var(--s5) 0; }
.calc__k { background: var(--dk-surface); border: 1px solid var(--dk-line); border-radius: var(--radius); padding: var(--s3); }
.calc__k b { display: block; font: 500 20px/1.1 var(--mono); color: var(--dk-hi); }
.calc__k span { font-size: 12px; color: var(--dk-dim); }
.calc details { margin-top: auto; border-top: 1px solid var(--dk-line); padding-top: var(--s3); font-size: 13px; color: var(--dk-dim); }
.calc summary { cursor: pointer; color: var(--dk-body); font-weight: 500; }
.calc details ul { padding-left: 18px; margin: var(--s2) 0 0; }
.calc .actions { margin-top: var(--s4); }
.seg { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; background: var(--n50); border: var(--hairline); border-radius: var(--radius); padding: 3px; gap: 3px; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label { margin: 0; text-align: center; padding: 10px 8px; border-radius: var(--radius-in); font-size: 14px; font-weight: 500; color: var(--n600); cursor: pointer; transition: background .14s ease-out, color .14s ease-out; }
.seg input:checked + label { background: #fff; color: var(--indigo); box-shadow: 0 1px 2px rgba(22, 16, 47, .12); font-weight: 600; }
.seg input:focus-visible + label { outline: 2px solid var(--volt); }
.range-row { display: flex; align-items: center; gap: var(--s3); }
.range-row output { font: 500 15px var(--mono); color: var(--indigo); min-width: 92px; text-align: right; }
input[type="range"] { flex: 1; accent-color: var(--indigo); height: 28px; }

/* ---------- forms (16.2, 16.6) ---------- */
.form { display: grid; gap: var(--s4); }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s4); }
.field label, .field .label { display: block; font-size: 14px; font-weight: 600; color: var(--indigo); margin-bottom: 6px; }
.field .why { display: block; font-size: 12px; color: var(--n400); font-weight: 400; margin-top: 4px; }
.input, .select, .textarea {
  width: 100%; min-height: 48px; padding: 12px 14px; border: 1px solid var(--n200); border-radius: var(--radius-in);
  background: #fff; color: var(--n900); font: 400 16px/1.4 var(--sans);
  transition: border-color .14s ease-out, box-shadow .14s ease-out; -webkit-appearance: none; appearance: none;
}
.select { background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23221748' stroke-width='1.5' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") right 12px center/18px no-repeat; padding-right: 40px; }
.textarea { min-height: 112px; resize: vertical; }
.input:hover, .select:hover, .textarea:hover { border-color: var(--n300); }
.input:focus, .select:focus, .textarea:focus { outline: none; border-color: var(--indigo); box-shadow: 0 0 0 3px rgba(146, 209, 72, .45); }
.input::placeholder { color: var(--n300); }
.input-unit { position: relative; }
.input-unit .input { padding-right: 56px; }
.input-unit span { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); font: 400 13px var(--mono); color: var(--n400); pointer-events: none; }
.field.is-invalid .input, .field.is-invalid .select { border-color: var(--error); }
.field .err { display: none; color: var(--error); font-size: 13px; margin-top: 6px; }
.field.is-invalid .err { display: block; }
.consent { display: flex; gap: 12px; align-items: flex-start; font-size: 13px; color: var(--n500); }
.consent input { width: 20px; height: 20px; margin: 1px 0 0; accent-color: var(--indigo); flex: none; }
.hp { position: absolute !important; left: -5000px !important; width: 1px; height: 1px; overflow: hidden; }
.form-card { background: #fff; border: var(--hairline); border-radius: var(--radius-lg); padding: var(--s5); box-shadow: var(--shadow); }
.form-msg { display: none; border-radius: var(--radius); padding: var(--s4); }
.form-msg.ok { display: block; background: var(--volt-050); color: var(--n700); }
.form-msg.ok h3 { color: var(--indigo); margin-bottom: 8px; }
.form-msg.bad { display: block; background: #FBEAEA; color: #8F2B2B; }
.contact-person { display: flex; gap: var(--s3); align-items: center; padding-top: var(--s4); border-top: var(--hairline); margin-top: var(--s2); }
.contact-person .avatar { width: 48px; height: 48px; border-radius: 50%; background: var(--indigo-50); display: grid; place-items: center; }
.contact-person .avatar img { width: 30px; }

/* ---------- product grid (hogar) ---------- */
.product { display: grid; grid-template-columns: auto 1fr; gap: var(--s3); padding: var(--s4); border: var(--hairline); border-radius: var(--radius); background: #fff; transition: border-color .15s ease-out, box-shadow .15s ease-out; }
.product:hover { border-color: var(--n300); box-shadow: var(--shadow); }
.product h3 { font-size: 17px; margin-bottom: 4px; }
.product p { font-size: 14px; color: var(--n500); margin: 0; }
.product .from { margin-top: 10px; font: 500 13px var(--mono); color: var(--volt-deep); }

/* ---------- tariffs ---------- */
.tariff { display: flex; flex-direction: column; padding: var(--s5) var(--s4); border: var(--hairline); border-radius: var(--radius-lg); background: #fff; }
.tariff--feat { border: 2px solid var(--indigo); box-shadow: var(--shadow); }
.tariff__seg { font: 600 12px/1 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--n500); }
.tariff h3 { font-size: 26px; margin: var(--s2) 0 var(--s2); letter-spacing: -.02em; }
.tariff .muted { font-size: 15px; }
.tariff .checks { margin: var(--s4) 0 var(--s5); font-size: 15px; }
.tariff .btn { margin-top: auto; }
.tariff__code { font: 500 12px var(--mono); color: var(--n400); }

/* ---------- FAQ ---------- */
.faq { border-top: var(--hairline); }
.faq details { border-bottom: var(--hairline); }
.faq summary { list-style: none; cursor: pointer; padding: var(--s4) 40px var(--s4) 0; position: relative; font-weight: 600; color: var(--indigo); font-size: 17px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; position: absolute; right: 4px; top: 50%; width: 12px; height: 12px; border-right: 1.5px solid var(--indigo); border-bottom: 1.5px solid var(--indigo); transform: translateY(-75%) rotate(45deg); transition: transform .2s var(--ease); }
.faq details[open] summary::after { transform: translateY(-25%) rotate(225deg); }
.faq .a { padding: 0 0 var(--s4); color: var(--n600); max-width: 70ch; }

/* ---------- callout ---------- */
.callout { border-left: 3px solid var(--indigo-500); background: var(--indigo-50); padding: var(--s3) var(--s4); border-radius: 0 var(--radius) var(--radius) 0; font-size: 14px; color: var(--n600); }
.callout b { display: block; font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--indigo-500); margin-bottom: 4px; }

/* ---------- CTA band ---------- */
.cta-band { position: relative; overflow: hidden; border-radius: var(--radius-lg); padding: var(--s6); background: linear-gradient(160deg, var(--indigo-900), var(--indigo-700)); color: var(--dk-body); display: grid; grid-template-columns: 7fr 5fr; gap: var(--s5); align-items: center; }
.cta-band h2 { color: var(--dk-hi); }
.cta-band > * { position: relative; z-index: 1; }
.cta-band .actions { margin-top: 0; justify-content: flex-end; }
.cta-band::after { content: ""; position: absolute; right: -80px; top: -80px; width: 320px; height: 320px; border-radius: 50%; border: 1px solid var(--dk-line); box-shadow: 0 0 0 48px rgba(46, 35, 96, .25), 0 0 0 96px rgba(46, 35, 96, .15); pointer-events: none; }

/* ---------- footer (16.4: Indigo 900, full sitemap) ---------- */
.site-footer { background: var(--indigo-900); color: var(--dk-body); padding: var(--s6) 0 var(--s5); font-size: 14px; }
.site-footer a { color: var(--dk-body); }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 4fr 2fr 2fr 2fr 2fr; gap: var(--s5); }
.footer-grid h4 { color: var(--dk-hi); font-size: 12px; letter-spacing: .16em; text-transform: uppercase; margin-bottom: var(--s3); }
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer-brand img { height: 40px; width: auto; margin-bottom: var(--s4); }
.footer-brand p { color: var(--dk-dim); max-width: 34ch; }
.footer-legal { margin-top: var(--s6); padding-top: var(--s4); border-top: 1px solid var(--dk-line); display: flex; flex-wrap: wrap; gap: var(--s3) var(--s5); justify-content: space-between; color: var(--dk-dim); font-size: 13px; }
.footer-legal nav { display: flex; gap: var(--s4); flex-wrap: wrap; }
.footer-legal a { color: var(--dk-dim); }

/* ---------- motion (18.x): fade-up 8px once, 60ms stagger ---------- */
.reveal { opacity: 0; transform: translateY(8px); transition: opacity .3s var(--ease), transform .3s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { transform: none; transition: opacity .2s linear; }
  .flow .ln-live { animation: none; stroke-dasharray: none; }
  .chain__bar span { transition: none; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .wrap { padding: 0 40px; }
  .g-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .issue__body { grid-template-columns: 1fr; gap: var(--s3); }
  .chain { grid-template-columns: 1fr 1fr; }
  .chain__step:nth-child(2) { border-right: 0; }
  .chain__step:nth-child(-n+2) { border-bottom: var(--hairline); }
}
@media (max-width: 900px) {
  .nav, .header-cta { display: none; }
  .nav-toggle { display: grid; }
  .site-header.nav-open { height: auto; background: #fff; }
  .site-header.nav-open .wrap { flex-wrap: wrap; padding-top: 12px; padding-bottom: 16px; }
  .site-header.nav-open .nav { display: flex; flex-direction: column; align-items: stretch; width: 100%; order: 3; margin: 8px 0 0; }
  .site-header.nav-open .nav a { padding: 14px 4px; border-bottom: 1px solid var(--n100); color: var(--n700) !important; font-size: 17px; }
  .site-header.nav-open .nav a[aria-current="page"]::after { display: none; }
  .site-header.nav-open .header-cta { display: inline-flex; order: 4; width: 100%; margin: 16px 0 0; }
  .site-header.nav-open .brand .logo-pri { display: block !important; }
  .site-header.nav-open .brand .logo-rev { display: none !important; }
  .site-header.nav-open .nav-toggle { color: var(--indigo) !important; }
  .g-2, .g-84, .g-57, .calc, .cta-band { grid-template-columns: 1fr; }
  .g-3 { grid-template-columns: 1fr; }
  .calc__in { border-right: 0; border-bottom: var(--hairline); }
  .cta-band .actions { justify-content: flex-start; }
  .hero__art img, .hero__art video { width: 120vw; right: -40%; opacity: .45; }
  .hero__art--photo img, .hero__art--photo video { width: 100%; right: 0; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 20px; }
  .section { padding: var(--s6) 0; }
  .section--tight { padding: var(--s5) 0; }
  .head { margin-bottom: var(--s5); }
  .g-4, .chain, .footer-grid, .form .row, .calc__grid { grid-template-columns: 1fr; }
  .chain__step { border-right: 0 !important; border-bottom: var(--hairline); }
  .chain__step:last-child { border-bottom: 0; }
  .hero { padding-top: calc(var(--header-h) + 56px); padding-bottom: var(--s6); }
  .hero-stats { grid-template-columns: 1fr; gap: var(--s4); width: 100%; }
  .issue { grid-template-columns: 1fr; gap: var(--s2); }
  .cta-band { padding: var(--s5) var(--s4); }
  .calc__in, .calc__out, .form-card { padding: var(--s4); }
  .btn { white-space: normal; text-align: center; }
  .actions .btn { width: 100%; }
}