/* =========================================================
   ALKRAS — Design tokens
   Palette derived from the subject: #D7263D is the visible
   wavelength of a common HeNe laser line, used as a single
   precise accent — not a wash of color.
   ========================================================= */

:root {
  --color-bg: #FAFAF8;
  --color-bg-alt: #F0F0EE;
  --color-ink: #12151A;
  --color-ink-soft: #4A5058;
  --color-line: #DEDCD6;
  --color-graphite: #12202E;
  --color-graphite-soft: #8B99A8;
  --color-beam: #D7263D;
  --color-beam-soft: rgba(215, 38, 61, 0.12);
  --color-accent: #D7263D;
  --color-ink-muted: #6B7280;

  --font-display: 'Exo 2', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --max-width: 1240px;
  --edge: clamp(20px, 5vw, 64px);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img, video { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.08;
  margin: 0;
  letter-spacing: -0.01em;
}

p { margin: 0 0 1em; color: var(--color-ink-soft); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-beam);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.eyebrow::before {
  content: '';
  width: 22px;
  height: 1px;
  background: var(--color-beam);
}

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

/* ---------- Nav ---------- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-line);
}

.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-mark {
  width: 9px;
  height: 9px;
  background: var(--color-beam);
  border-radius: 50%;
  flex-shrink: 0;
}

.brand-logo {
  height: 38px;
  width: auto;
  display: block;
}

.brand-logo--footer {
  height: 30px;
}

.nav-links {
  display: flex;
  gap: 36px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 14px;
  font-weight: 500;
}

.nav-links a {
  padding: 6px 2px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  border-bottom-color: var(--color-beam);
}

.nav-toggle { display: none; }

/* Nav dropdowns */
.nav-links > li { position: relative; }

.nav-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  left: -16px;
  background: #0b1825;
  min-width: 300px;
  border-top: 3px solid var(--color-beam);
  box-shadow: 0 12px 40px rgba(0,0,0,0.35);
  z-index: 200;
  border-radius: 0 0 6px 6px;
  overflow: hidden;
}

.nav-dropdown-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  font-size: 14px;
  font-weight: 700;
  color: #fff !important;
  background: var(--color-beam);
  border-bottom: none !important;
  letter-spacing: .02em;
  text-transform: uppercase;
}
.nav-dropdown-head::after { content: '→'; font-size: 13px; opacity: 0.85; margin-left: 8px; font-weight: 400; }
.nav-dropdown-head:hover { background: #a8111a !important; color: #fff !important; }

.site-nav .has-dropdown.is-open > .nav-dropdown { display: block; }

.nav-dropdown a {
  display: block;
  padding: 13px 20px;
  font-size: 13px;
  color: rgba(255,255,255,0.75);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  border-bottom-color: rgba(255,255,255,0.06) !important;
  white-space: nowrap;
}

.nav-dropdown a:hover { color: #fff; background: rgba(255,255,255,0.06); padding-left: 26px; transition: padding .15s ease; }

.has-dropdown > a::after {
  content: ' ▾';
  font-size: 9px;
  opacity: 0.55;
  margin-left: 2px;
  display: inline-block;
  transition: transform .18s ease;
}
.site-nav .has-dropdown.is-open > a::after { transform: rotate(180deg); opacity: 0.9; }

@media (max-width: 760px) {
  .nav-dropdown {
    position: static;
    min-width: 0;
    width: 100%;
    box-shadow: none;
    border-radius: 0;
    border-top: 2px solid var(--color-beam);
    margin-top: 8px;
    top: auto;
    left: auto;
  }
  .nav-dropdown a {
    font-size: 15px;
    padding: 12px 20px;
    white-space: normal;
    color: rgba(255,255,255,0.8);
  }
}

@media (max-width: 760px) {
  /* Desktop nav-links list is not used on mobile — the slide-in
     sidebar (below) replaces it entirely. */
  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: 1px solid var(--color-line);
    border-radius: 6px;
    width: 40px;
    height: 40px;
    padding: 0;
    cursor: pointer;
  }
  .nav-toggle-icon {
    font-size: 18px;
    line-height: 1;
    color: var(--color-ink);
  }
}

/* ---------- Mobile sidebar (slide-in nav) ---------- */

.mobile-sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 10000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 280ms ease, visibility 0s linear 280ms;
}

.mobile-sidebar-overlay.is-open {
  opacity: 1;
  visibility: visible;
  transition: opacity 280ms ease, visibility 0s linear 0s;
}

.mobile-sidebar {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 78vw;
  max-width: 340px;
  background: var(--color-graphite);
  z-index: 10001;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 280ms ease;
  box-shadow: -8px 0 32px rgba(0, 0, 0, 0.35);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-sidebar.is-open {
  transform: translateX(0);
}

.mobile-sidebar-header {
  display: flex;
  align-items: center;
  padding: 20px var(--edge);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  flex-shrink: 0;
}

.mobile-sidebar-header .brand-logo {
  height: 32px;
  width: auto;
  background: #fff;
  padding: 4px 8px;
  border-radius: 4px;
}

.mobile-sidebar-nav {
  list-style: none;
  margin: 0;
  padding: 8px 0 24px;
}

.mobile-sidebar-nav li {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-sidebar-nav > li:last-child {
  border-bottom: none;
}

.mobile-sidebar-nav a,
.mobile-sidebar-nav .mobile-sidebar-parent-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px var(--edge);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
}

.mobile-sidebar-nav a[aria-current="page"] {
  color: #fff;
}

.mobile-sidebar-nav a[aria-current="page"]::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-beam);
  display: inline-block;
  margin-right: 10px;
}

.mobile-sidebar-parent-toggle .mobile-sidebar-caret {
  font-size: 11px;
  opacity: 0.6;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.mobile-sidebar-item.is-open .mobile-sidebar-parent-toggle .mobile-sidebar-caret {
  transform: rotate(180deg);
}

.mobile-sidebar-submenu {
  list-style: none;
  margin: 0;
  padding: 0;
  background: rgba(0, 0, 0, 0.18);
  max-height: 0;
  overflow: hidden;
  transition: max-height 280ms ease;
}

.mobile-sidebar-item.is-open .mobile-sidebar-submenu {
  max-height: 600px;
}

.mobile-sidebar-submenu li {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.mobile-sidebar-submenu li:last-child {
  border-bottom: none;
}

.mobile-sidebar-submenu a {
  padding: 14px var(--edge) 14px calc(var(--edge) + 16px);
  font-size: 14.5px;
  color: rgba(255, 255, 255, 0.72);
}

.mobile-sidebar-lang {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px var(--edge);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.mobile-sidebar-lang a {
  color: rgba(255, 255, 255, 0.6);
  padding: 4px 2px;
}

.mobile-sidebar-lang a[aria-current] {
  color: var(--color-beam);
  font-weight: 700;
}

.mobile-sidebar-lang span {
  color: rgba(255, 255, 255, 0.35);
}

html.mobile-sidebar-lock,
body.mobile-sidebar-lock {
  overflow: hidden;
}

@media (min-width: 761px) {
  .mobile-sidebar-overlay,
  .mobile-sidebar {
    display: none;
  }
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: calc(100svh - 77px);
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--color-graphite);
  color: #fff;
}

.hero-media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}

.hero-media-placeholder {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(215,38,61,0.10), transparent 55%),
    linear-gradient(160deg, #0B141C 0%, #16283A 60%, #0B141C 100%);
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,15,20,0.92) 0%, rgba(10,15,20,0.35) 45%, rgba(10,15,20,0.15) 100%);
}

.hero-sweep {
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: 100%;
  background: var(--color-beam);
  box-shadow: 0 0 24px 2px var(--color-beam);
  animation: sweep 1.8s cubic-bezier(.65,0,.35,1) forwards;
  z-index: 2;
}

@keyframes sweep {
  0% { left: 0; opacity: 1; }
  85% { opacity: 1; }
  100% { left: 100%; opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-sweep { display: none; }
}

.hero-content {
  position: relative;
  z-index: 3;
  padding: 40px var(--edge) 48px;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.hero-content .eyebrow { margin-bottom: 14px; color: #fff; }
.hero-content .eyebrow::before { background: var(--color-beam); }

.hero h1 {
  font-size: clamp(28px, 4.2vw, 54px);
  max-width: 780px;
  margin-bottom: 16px;
}

.hero-sub {
  font-size: clamp(14px, 1.6vw, 18px);
  color: rgba(255,255,255,0.78);
  max-width: 46ch;
  margin-bottom: 24px;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* Mobile keeps its original hero look (this fix targets desktop/tablet only). */
@media (max-width: 760px) {
  .hero {
    min-height: 78vh;
    align-items: flex-end;
  }
  .hero-content {
    padding: 64px var(--edge) 72px;
  }
  .hero-content .eyebrow { margin-bottom: 18px; }
  .hero h1 {
    font-size: clamp(40px, 6vw, 78px);
    max-width: 15ch;
    margin-bottom: 20px;
  }
  .hero-sub {
    font-size: clamp(16px, 2vw, 20px);
    margin-bottom: 32px;
  }
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 14px 24px;
  border-radius: 2px;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  cursor: pointer;
}

.btn-primary {
  background: var(--color-beam);
  color: #fff;
}
.btn-primary:hover { background: #b81e33; }

.btn-ghost {
  border-color: rgba(255,255,255,0.35);
  color: #fff;
}
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,0.08); }

.btn-outline {
  border-color: var(--color-line);
  color: var(--color-ink);
}
.btn-outline:hover { border-color: var(--color-ink); }

/* ---------- Sections ---------- */

section { padding: 96px 0; }
section + section { border-top: 1px solid var(--color-line); }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.section-head h2 {
  font-size: clamp(28px, 3.6vw, 42px);
  max-width: 20ch;
}

.section-head p { max-width: 44ch; margin: 0; }

/* ---------- Two-column intro ---------- */

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

@media (max-width: 820px) {
  .split { grid-template-columns: 1fr; gap: 36px; }
}

.split-media {
  aspect-ratio: 4/3;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-graphite-soft);
  text-align: center;
  padding: 24px;
}

/* ---------- Capability tiles ---------- */

.tile-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}

@media (max-width: 820px) {
  .tile-grid { grid-template-columns: 1fr; }
}

.leader-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}

@media (max-width: 820px) {
  .leader-grid { grid-template-columns: 1fr; }
}

.tile {
  background: var(--color-accent);
  padding: 40px 32px;
  transition: background 0.15s ease;
}

.tile:hover { background: #a8111a; }

.tile h3 { color: #fff; }
.tile p { color: rgba(255,255,255,0.85); }

.tile-index {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255,255,255,0.55);
  margin-bottom: 24px;
}

.tile h3 { font-size: 20px; margin-bottom: 12px; }
.tile p { font-size: 14.5px; margin-bottom: 0; }

/* ---------- Editorial cards ---------- */

.card-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

@media (max-width: 900px) {
  .card-row { grid-template-columns: 1fr; }
}

.card {
  display: block;
  border: 1px solid var(--color-line);
}

.card-media {
  aspect-ratio: 16/10;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-graphite-soft);
  border-bottom: 1px solid var(--color-line);
}

.card-body { padding: 22px 24px 26px; }

.card-date {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-ink-soft);
  letter-spacing: 0.04em;
  margin-bottom: 10px;
  display: block;
}

.card h3 { font-size: 17px; margin-bottom: 6px; }

/* ---------- Certification / patent strip ---------- */

.cert-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}

.cert-card {
  background: var(--color-bg);
  padding: 28px;
}

.cert-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-graphite-soft);
  margin-bottom: 10px;
}

.cert-number {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--color-beam);
  margin-bottom: 8px;
}

.cert-card h4 {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

.cert-card p { font-size: 13px; margin-bottom: 0; }

/* ---------- Stat strip ---------- */

.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 56px 0;
}

@media (max-width: 700px) {
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
}

.stat .num {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  color: var(--color-ink);
  display: block;
}

.stat .label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
}

.band-dark .stat .num { color: #fff; }
.band-dark .stat .label { color: rgba(255,255,255,0.6); }

/* ---------- Dark CTA band ---------- */

.band-dark {
  background: var(--color-graphite);
  color: #fff;
}

.band-dark p { color: rgba(255,255,255,0.7); }
.band-dark .eyebrow { color: #fff; }
.band-dark .eyebrow::before { background: var(--color-beam); }

.cta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}

.cta-row h2 { max-width: 18ch; font-size: clamp(26px, 3.2vw, 38px); }

/* ---------- Contact form ---------- */

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 640px;
}

.form-grid .full { grid-column: 1 / -1; }

@media (max-width: 600px) {
  .form-grid { grid-template-columns: 1fr; }
}

label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
  margin-bottom: 8px;
}

input, textarea {
  width: 100%;
  border: 1px solid var(--color-line);
  background: var(--color-bg);
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--color-ink);
  border-radius: 2px;
}

input:focus, textarea:focus, a:focus-visible, button:focus-visible {
  outline: 2px solid var(--color-beam);
  outline-offset: 2px;
}

textarea { resize: vertical; min-height: 130px; }

/* ---------- Footer ---------- */

footer {
  background: #C0161E;
  color: rgba(255,255,255,0.85);
  padding: 48px 0 24px;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.2);
}

@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

.footer-grid h5 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
  margin-bottom: 16px;
  font-weight: 500;
}

.footer-grid ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }

.footer-grid a:hover { color: #fff; }

.footer-brand .brand { color: #fff; margin-bottom: 14px; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  font-size: 12.5px;
  color: rgba(255,255,255,0.4);
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- Page hero (interior pages) ---------- */

.page-hero {
  padding: 36px 0 32px;
  border-bottom: 1px solid var(--color-line);
}

.page-hero h1 {
  font-size: clamp(26px, 3.2vw, 40px);
  max-width: 760px;
}

.page-hero p { max-width: 52ch; margin-top: 16px; font-size: 16px; line-height: 1.5; }

.page-hero .split {
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: flex-start;
}

/* Lightbox */
.lightbox-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
}
.lightbox-overlay.is-open { display: flex; }
.lightbox-overlay img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 2px;
  cursor: default;
  box-shadow: 0 8px 48px rgba(0,0,0,0.6);
}
.lightbox-close {
  position: absolute;
  top: 20px;
  right: 28px;
  color: #fff;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  font-family: var(--font-mono);
  opacity: 0.65;
  transition: opacity .15s;
  user-select: none;
}
.lightbox-close:hover { opacity: 1; }