/* ============================================================================
   Metox Energy — site styles
   Design system: "blueprint / wireframe industrial".
   Tokens and component classes adapted from the Claude Design export
   (_source/mockups/_ds/.../styles.css) and the site mockup's inline styles.
   Plain CSS, no build step.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Barlow:wght@400;500;700&family=Barlow+Condensed:wght@400;600&display=swap');

:root {
  --color-bg: #f2f2f3;
  --color-surface: #e9e9ea;
  --color-text: #1d1f20;
  --color-accent: #5980a6;
  --color-accent-2: #728fab;
  --color-divider: color-mix(in srgb, #1d1f20 16%, transparent);

  --color-neutral-500: #98989b;
  --color-neutral-600: #7a7a7d;

  --color-accent-100: #eef6ff;
  --color-accent-200: #d6ebff;
  --color-accent-300: #b5d9fd;
  --color-accent-700: #416180;
  --color-accent-800: #2c455d;
  --color-accent-900: #1d2d3d;

  --font-heading: "Barlow Condensed", system-ui, sans-serif;
  --font-body: "Barlow", system-ui, sans-serif;

  --wrap: 1200px;
  --pad: 40px;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0 0 6.8px;
}

p { margin: 0 0 10px; }
a { color: var(--color-accent-700); text-underline-offset: 3px; }
a:hover { color: var(--color-accent); }
img { display: block; max-width: 100%; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
::selection { background: color-mix(in srgb, var(--color-accent) 30%, transparent); }

.text-muted { color: color-mix(in srgb, var(--color-text) 55%, transparent); }
.mx-eyebrow {
  font: 600 11px/1 var(--font-heading);
  letter-spacing: .22em; text-transform: uppercase; color: var(--color-accent-700);
}
.card-kicker {
  font: 600 10px var(--font-heading);
  letter-spacing: .1em; text-transform: uppercase; color: var(--color-accent);
}

.mx-wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--pad); }

/* — blueprint frame with corner registration marks — */
.blueprint { position: relative; border: 1px solid var(--color-divider); }
.blueprint.duotone { overflow: visible; }
.blueprint > .corner {
  position: absolute; width: 11px; height: 11px;
  color: color-mix(in srgb, var(--color-text) 55%, transparent);
}
.blueprint > .corner::before, .blueprint > .corner::after { content: ""; position: absolute; background: currentColor; }
.blueprint > .corner::before { left: 5px; top: 0; width: 1px; height: 100%; }
.blueprint > .corner::after  { top: 5px; left: 0; width: 100%; height: 1px; }
.blueprint > .corner.tl { top: -6px; left: -6px; }
.blueprint > .corner.tr { top: -6px; right: -6px; }
.blueprint > .corner.bl { bottom: -6px; left: -6px; }
.blueprint > .corner.br { bottom: -6px; right: -6px; }

/* — image placeholders (swap for real photos: see README) — */
.ph {
  display: grid; place-items: center; text-align: center;
  background: var(--color-accent-800);
  background-image: var(--img, none);
  background-size: cover; background-position: center;
  color: rgba(255,255,255,.6);
  font: 600 10px var(--font-heading);
  letter-spacing: .16em; text-transform: uppercase;
  position: relative; overflow: hidden;
}
.ph.duotone::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: var(--color-accent); mix-blend-mode: color; }
.ph .ph-label { padding: 0 12px; position: relative; z-index: 1; }
/* when a real photo is set, show it in true colour and drop the label */
.ph.has-img .ph-label { display: none; }
.ph.has-img.duotone::after { display: none; }

/* — buttons — */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  cursor: pointer; text-decoration: none;
  font-family: var(--font-heading); font-weight: 600; font-size: 14px; line-height: 1.2;
  color: var(--color-text);
  background: transparent; border: 1px solid var(--color-divider);
  padding: 6.8px 12px;
}
.btn-primary { background: var(--color-accent); color: var(--color-bg); border-color: var(--color-accent); }
.btn-primary:hover { background: var(--color-accent-700); color: var(--color-bg); }
.btn-secondary:hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); }
.btn-block { width: 100%; }
.btn-on-dark { border-color: rgba(255,255,255,.6); color: #fff; }
.btn-on-dark:hover { background: rgba(255,255,255,.1); color: #fff; }

/* — tags — */
.tag { display: inline-flex; align-items: center; font-size: 11px; letter-spacing: .02em; padding: 3px 10px; }
.tag-accent { background: var(--color-accent-100); color: var(--color-accent-800); }
.tag-neutral { background: #f5f5f8; color: #424244; }
.tag-outline { border: 1px solid var(--color-accent); color: var(--color-accent); }

/* — tables — */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table td { padding: 6.8px; border-bottom: 1px solid color-mix(in srgb, var(--color-text) 8%, transparent); }
.table td.k { width: 42%; color: color-mix(in srgb, var(--color-text) 55%, transparent); }
.table tr:last-child td { border-bottom: none; }

/* — forms — */
.field > label { display: block; font-size: 12px; margin-bottom: 5px; color: color-mix(in srgb, var(--color-text) 70%, transparent); }
.input {
  width: 100%; min-height: 36px; padding: 6px 10px; font: inherit; font-size: 14px;
  color: var(--color-text); caret-color: var(--color-accent);
  background: var(--color-surface); border: 1px solid var(--color-divider);
}
.input:focus-visible { border-color: var(--color-accent); outline-offset: 0; }
textarea.input { min-height: 90px; resize: vertical; }
.seg { display: inline-flex; border: 1px solid var(--color-divider); }
.seg-opt { display: inline-flex; align-items: center; padding: 7px 12px; font-size: 13px; cursor: pointer; user-select: none; }
.seg-opt + .seg-opt { border-left: 1px solid var(--color-divider); }
.seg-opt.active { background: var(--color-accent); color: var(--color-bg); }
.seg-opt:not(.active):hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); }

/* ===== NAV ============================================================== */
.nav {
  display: flex; align-items: center; gap: 24px;
  border-bottom: 1px solid var(--color-divider);
  padding: 15px var(--pad);
  position: sticky; top: 0; z-index: 40; background: var(--color-bg);
}
.nav-brand { display: flex; align-items: center; gap: 11px; margin-right: auto; cursor: pointer; text-decoration: none; color: var(--color-text); }
.nav-brand span { font: 600 22px var(--font-heading); letter-spacing: .02em; }
.nav-links { display: flex; align-items: center; gap: 24px; }
.mx-nav {
  color: var(--color-text); text-decoration: none; font-size: 14px;
  padding: 6px 2px; border-bottom: 2px solid transparent; cursor: pointer; background: none; border-top: none; border-left: none; border-right: none; font-family: var(--font-body);
}
.mx-nav:hover, .mx-nav.active { color: var(--color-accent); border-bottom-color: var(--color-accent); }
.mx-lang { display: flex; border: 1px solid var(--color-divider); }
.mx-lang span { cursor: pointer; font: 600 12px var(--font-heading); letter-spacing: .08em; padding: 5px 9px; user-select: none; }
.mx-lang span.active { background: var(--color-accent); color: #fff; }
.nav-toggle { display: none; background: none; border: 1px solid var(--color-divider); padding: 8px 10px; cursor: pointer; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  display: block; width: 20px; height: 2px; background: var(--color-text); position: relative;
}
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; left: 0; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

/* ===== VIEWS ============================================================ */
.view { display: none; }
.view.active { display: block; }
main { min-height: 60vh; }

/* ===== HOME ============================================================= */
.hero { position: relative; height: 520px; overflow: hidden; background: var(--color-accent-900); }
.hero-bg { position: absolute; inset: 0; background: repeating-linear-gradient(115deg, var(--color-accent-800) 0 46px, var(--color-accent-900) 46px 96px); opacity: .5; background-size: cover; background-position: center; }
.hero-bg.has-img { background: var(--img) center/cover; opacity: 1; }
.hero-scrim { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(14,23,33,.9) 0 44%, rgba(14,23,33,.12) 100%); }
.hero-inner { position: relative; height: 100%; display: flex; flex-direction: column; justify-content: center; }
.hero-inner > div { max-width: 660px; }
.hero .eyebrow { font: 600 11px var(--font-heading); letter-spacing: .22em; text-transform: uppercase; color: var(--color-accent-300); margin-bottom: 18px; }
.hero h1 { font-size: 58px; line-height: 1.02; color: #fff; margin: 0 0 18px; max-width: 16ch; }
.hero p { font-size: 17px; color: rgba(255,255,255,.84); max-width: 54ch; margin: 0 0 26px; }
.hero .btn-row { display: flex; gap: 12px; flex-wrap: wrap; }

.section { padding: 60px var(--pad) 20px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 26px; gap: 16px; }
.section-head h2 { font-size: 30px; margin: 0; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.thumb { cursor: pointer; text-decoration: none; color: inherit; display: block; }
.thumb .ph { height: 170px; margin-bottom: 16px; }
.thumb h4 { margin: 6px 0 6px; font-size: 21px; }
.thumb p { font-size: 14px; margin: 0; }

.band { background: var(--color-accent-900); color: var(--color-bg); margin-top: 60px; }
.band .mx-wrap { padding: 48px var(--pad); }
.band .section-head h2 { color: var(--color-bg); }
.band .section-head span { font-size: 13px; color: var(--color-accent-200); }
.road { display: grid; grid-template-columns: repeat(3, 1fr); }
.road > div { padding: 0 30px; border-right: 1px solid rgba(255,255,255,.18); }
.road > div:first-child { padding-left: 0; }
.road > div:last-child { padding-right: 0; border-right: none; }
.road .phase { font: 600 12px var(--font-heading); letter-spacing: .14em; color: var(--color-accent-300); }
.road .rtitle { font: 600 26px var(--font-heading); margin: 8px 0 10px; }
.road p { font-size: 14px; color: #eef6ff; margin: 0; }

.rstrip { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.rstrip h2 { font-size: 30px; margin: 0 0 14px; }
.rstrip p { font-size: 15px; color: var(--color-accent-900); margin: 0 0 20px; }
.rstrip .ph { height: 260px; }

.partners { border-top: 1px solid var(--color-divider); padding: 34px var(--pad); }
.partners .mx-eyebrow { display: block; margin-bottom: 14px; }
.partners ul { list-style: none; display: flex; flex-wrap: wrap; gap: 14px 34px; margin: 0; padding: 0; }
.partners li { font: 600 18px var(--font-heading); letter-spacing: .02em; color: var(--color-neutral-600); }

.cta-box { padding: 40px; display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-box h3 { margin: 0 0 6px; font-size: 26px; }

/* ===== PAGE HEADS (products/tech/etc.) ================================== */
.page { padding: 56px var(--pad) 64px; }
.page > .mx-eyebrow { display: block; margin-bottom: 14px; }
.page h1 { font-size: 46px; margin: 0 0 14px; max-width: 20ch; }
.page > .lede { font-size: 16px; color: var(--color-accent-900); max-width: 64ch; margin: 0 0 40px; }

/* products */
.prow { display: grid; gap: 40px; align-items: center; padding: 32px 0; border-top: 1px solid var(--color-divider); }
.prow.img-left { grid-template-columns: 1fr 1.15fr; }
.prow.img-right { grid-template-columns: 1.15fr 1fr; }
.prow:last-of-type { border-bottom: 1px solid var(--color-divider); }
.prow .ph { height: 300px; }
.prow h2 { font-size: 30px; margin: 6px 0 12px; }
.prow p.body { font-size: 15px; color: var(--color-accent-900); margin: 0 0 18px; }
.subcards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.subcard { padding: 16px; }
.subcard .st { font: 600 17px var(--font-heading); }
.subcard p { font-size: 13px; margin: 6px 0 0; }
.tag-row { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; }

/* technology */
.diagram-wrap { padding: 34px 30px 26px; margin-bottom: 44px; }
.tech-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.tech-cards .blueprint { padding: 24px; }
.tech-cards h3 { font-size: 21px; margin: 8px 0 8px; }
.tech-cards p { font-size: 14px; margin: 0; }

/* research */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 44px; }
.stats .blueprint { padding: 22px; }
.stat-num { font: 600 34px var(--font-heading); color: var(--color-accent); }
.stat-lbl { font-size: 13px; }
.pub { display: grid; grid-template-columns: 64px 1fr auto; gap: 20px; align-items: center; padding: 18px 0; border-top: 1px solid var(--color-divider); }
.pub:last-child { border-bottom: 1px solid var(--color-divider); }
.pub .year { font: 600 15px var(--font-heading); color: var(--color-accent); letter-spacing: .06em; }
.pub .ptitle { font-size: 15px; font-weight: 600; }
.pub .venue { font-size: 13px; }
.pub .tags { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }

/* team */
.team-group + .team-group { margin-top: 40px; }
.team-group > h3 { font-size: 15px; letter-spacing: .12em; text-transform: uppercase; color: var(--color-accent-700); margin: 0 0 20px; }
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.team-grid.founders { grid-template-columns: repeat(2, 1fr); max-width: 620px; }
.member .ph { aspect-ratio: 1/1; margin-bottom: 14px; }
.member-photo { display: block; width: 100%; aspect-ratio: 1/1; object-fit: cover; object-position: center top; margin-bottom: 14px; }
.member .name { font: 600 18px var(--font-heading); }
.member .role { font-size: 13px; color: var(--color-accent-700); }
.member p { font-size: 13px; margin: 8px 0 0; }

/* facilities */
.fac-mosaic { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: 220px 220px; gap: 20px; margin-bottom: 44px; }
.fac-mosaic .ph.tall { grid-row: span 2; }
.fac-eq { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.fac-eq .blueprint { padding: 22px; }
.fac-eq h4 { font-size: 19px; margin: 0 0 8px; }
.fac-eq p { font-size: 13px; margin: 0; }

/* contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 56px; }
.contact-info .row { margin-bottom: 18px; }
.contact-info .row .mx-eyebrow { display: block; margin-bottom: 6px; }
.contact-info .row .val { font-size: 15px; white-space: pre-line; }
.contact-form { padding: 32px; }
.form-2col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.contact-form .field { margin-bottom: 16px; }
.form-note { font-size: 13px; margin-top: 14px; }

/* ===== FOOTER =========================================================== */
.footer { background: var(--color-accent-900); color: var(--color-accent-100); margin-top: 60px; }
.footer .cols { padding: 44px var(--pad) 30px; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
.footer .brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer .brand span { font: 600 20px var(--font-heading); color: #fff; }
.footer .desc { font-size: 13px; max-width: 40ch; margin: 0; color: var(--color-accent-200); }
.footer h4 { font: 600 12px var(--font-heading); letter-spacing: .16em; text-transform: uppercase; color: #fff; margin-bottom: 12px; }
.footer .fcol a, .footer .fcol div { display: block; color: var(--color-accent-200); text-decoration: none; font-size: 14px; margin-bottom: 8px; cursor: pointer; }
.footer .fcol a:hover { color: #fff; }
.footer .legal { padding: 16px var(--pad); border-top: 1px solid rgba(255,255,255,.15); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 12px; color: var(--color-accent-300); }

/* ===== RESPONSIVE ======================================================= */
@media (max-width: 960px) {
  .rstrip, .contact-grid { grid-template-columns: 1fr; gap: 30px; }
  .prow.img-left, .prow.img-right { grid-template-columns: 1fr; }
  .prow.img-right .ph { order: -1; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .footer .cols { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 820px) {
  :root { --pad: 22px; }
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--color-bg); border-bottom: 1px solid var(--color-divider);
    padding: 8px var(--pad) 16px; display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links .mx-nav { padding: 12px 0; border-bottom: 1px solid var(--color-divider); }
  .nav-links .btn { margin-top: 12px; }
  .nav-links .mx-lang { align-self: flex-start; margin-top: 12px; }
  .hero { height: auto; padding: 72px 0; }
  .hero h1 { font-size: 40px; }
  .grid-3, .tech-cards, .stats, .fac-eq { grid-template-columns: 1fr; }
  .road { grid-template-columns: 1fr; gap: 24px; }
  .road > div { padding: 0 0 24px; border-right: none; border-bottom: 1px solid rgba(255,255,255,.18); }
  .road > div:last-child { border-bottom: none; padding-bottom: 0; }
  .subcards, .form-2col { grid-template-columns: 1fr; }
  .fac-mosaic { grid-template-columns: 1fr; grid-template-rows: none; }
  .fac-mosaic .ph { height: 200px; }
  .fac-mosaic .ph.tall { grid-row: auto; }
  .page h1 { font-size: 36px; }
  .cta-box { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 520px) {
  .team-grid, .team-grid.founders { grid-template-columns: 1fr; }
  .footer .cols { grid-template-columns: 1fr; }
  .pub { grid-template-columns: 48px 1fr; }
  .pub .tags { grid-column: 2; justify-content: flex-start; }
}