:root {
  --bg: #0e1726;
  --surface: #182236;
  --surface-soft: #1f2a40;
  --ink: #e6edf6;
  --muted: #8fa3bd;
  --line: #2e3a52;
  --teal: #56b8d6;
  --green: #6ec9e3;
  --amber: #ff8a3c;
  --shadow: 0 24px 80px rgba(8, 16, 30, 0.55);
  --radius: 8px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.55;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ─── HEADER ─── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
  padding: 0 5vw;
  border-bottom: 1px solid rgba(46, 58, 82, 0.92);
  background: rgba(14, 23, 38, 0.86);
  backdrop-filter: blur(18px);
}

.brand, .header-actions, .nav { display: flex; align-items: center; }

.brand {
  gap: 10px;
  font-weight: 760;
  font-size: 16px;
  white-space: nowrap;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background:
    linear-gradient(135deg, transparent 48%, rgba(255,255,255,0.72) 50%, transparent 52%),
    linear-gradient(135deg, var(--teal), #3a9cb8);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.18);
  flex-shrink: 0;
}

.nav {
  gap: 6px;
  color: var(--muted);
  font-size: 14px;
}

.nav a {
  padding: 6px 10px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}

.nav a:hover { color: var(--ink); background: rgba(255,255,255,0.05); }
.nav a.active { color: var(--ink); font-weight: 680; }

.header-actions { gap: 10px; }

/* ─── BUTTONS ─── */

.lang-switch, .button {
  border: 1px solid transparent;
  border-radius: 8px;
  font: inherit;
  font-weight: 680;
  cursor: pointer;
}

.lang-switch {
  width: 42px;
  height: 34px;
  color: var(--teal);
  background: var(--surface);
  border-color: var(--line);
  font-size: 13px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  color: #0b1626;
  background: var(--teal);
  box-shadow: 0 8px 24px rgba(86, 184, 214, 0.22);
}

.button:hover { background: #6fc7e0; }

.button-small {
  min-height: 34px;
  padding: 0 14px;
  font-size: 13px;
}

.button-secondary {
  color: var(--teal);
  background: rgba(86, 184, 214, 0.1);
  border-color: rgba(86, 184, 214, 0.32);
  box-shadow: none;
}

.button-secondary:hover { background: rgba(86, 184, 214, 0.18); }

.button-ghost {
  color: var(--ink);
  background: transparent;
  border-color: var(--line);
  box-shadow: none;
}

.button-ghost:hover { background: var(--surface); }

/* ─── TYPOGRAPHY ─── */

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1, h2, h3, p { overflow-wrap: anywhere; }

h1 {
  margin: 0;
  font-size: clamp(40px, 6vw, 76px);
  line-height: 0.97;
  letter-spacing: -0.02em;
}

h2 {
  margin: 0;
  font-size: clamp(28px, 3.8vw, 48px);
  line-height: 1.07;
  letter-spacing: -0.01em;
}

h3 {
  margin: 0 0 10px;
  font-size: 20px;
  line-height: 1.25;
}

/* ─── HOMEPAGE HERO ─── */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(340px, 1.05fr);
  align-items: center;
  gap: 56px;
  min-height: calc(100vh - 68px);
  padding: 64px 5vw 72px;
}

.hero-copy { max-width: 680px; }

.hero-lede {
  margin: 22px 0 0;
  max-width: 580px;
  color: var(--muted);
  font-size: clamp(17px, 1.8vw, 20px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 36px 0 0;
}

.metrics div {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(24, 34, 54, 0.6);
}

.metrics dt { font-weight: 760; font-size: 15px; }

.metrics dd {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 13px;
}

/* ─── ARCHITECTURE STACK (hero visual + platform diagram) ─── */

.arch-visual {
  border-radius: var(--radius);
  overflow: hidden;
}

.arch-stack {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.arch-layer {
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
}

.arch-layer:last-child { border-bottom: none; }

.arch-layer-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-weight: 760;
  margin-bottom: 5px;
}

.arch-layer-name {
  font-weight: 760;
  font-size: 17px;
}

.arch-layer-sub {
  font-size: 13px;
  color: var(--muted);
  margin-top: 4px;
}

.arch-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.arch-tag {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 650;
  background: rgba(86, 184, 214, 0.12);
  color: var(--teal);
}

.arch-layer.layer-bangoptix {
  border-left: 3px solid rgba(86, 184, 214, 0.4);
}

.arch-layer.layer-bangstream {
  background: var(--teal);
  border-color: var(--teal);
  border-left-color: var(--teal);
  color: #0b1626;
}

.arch-layer.layer-bangstream .arch-layer-label { color: rgba(11,22,38,0.72); }
.arch-layer.layer-bangstream .arch-layer-sub { color: rgba(11,22,38,0.72); }
.arch-layer.layer-bangstream .arch-tag {
  background: rgba(11,22,38,0.16);
  color: #0b1626;
}

.arch-layer.layer-app {
  background: var(--surface-soft);
}

/* ─── SECTIONS ─── */

.section { padding: 88px 5vw; }

.section-heading {
  max-width: 820px;
  margin-bottom: 40px;
}

.section-heading p:not(.eyebrow) {
  max-width: 680px;
  color: var(--muted);
  font-size: 18px;
  margin: 14px 0 0;
}

.intro-band {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 72px 5vw;
}

.intro-band .inner { max-width: 940px; }

.intro-band h2 { max-width: 820px; }

.intro-band p {
  max-width: 760px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 19px;
}

/* ─── PRODUCT GRID ─── */

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.product-card {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.product-badge {
  display: inline-flex;
  align-items: center;
  height: 26px;
  padding: 0 12px;
  border-radius: 6px;
  background: rgba(86, 184, 214, 0.12);
  color: var(--teal);
  font-size: 12px;
  font-weight: 760;
  margin-bottom: 18px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.product-card h3 {
  font-size: 30px;
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}

.product-tagline {
  color: var(--muted);
  font-size: 16px;
  margin: 0 0 20px;
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.feature-list li {
  padding-left: 16px;
  position: relative;
  color: #c4d2e6;
  font-size: 15px;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--green);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 24px;
  color: var(--teal);
  font-weight: 720;
  font-size: 14px;
}

.card-link:hover { color: #7fd0ea; }

/* ─── CARDS / USE CASES ─── */

.card-grid { display: grid; gap: 18px; }
.card-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.feature-card, .use-case-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.feature-card {
  padding: 26px;
}

.icon-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 20px;
  border-radius: 8px;
  color: var(--teal);
  background: rgba(86, 184, 214, 0.12);
  font-weight: 800;
  font-size: 14px;
}

.feature-card p { color: var(--muted); }

.feature-card ul {
  display: grid;
  gap: 9px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.feature-card li {
  padding-left: 16px;
  position: relative;
  color: #c4d2e6;
}

.feature-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--green);
}

.use-cases { background: var(--surface-soft); }

.use-case-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.2fr 0.9fr;
  gap: 18px;
  align-items: stretch;
}

.use-case-panel {
  min-height: 260px;
  padding: 28px;
}

.use-case-panel.emphasized {
  background: linear-gradient(135deg, #163048, #0f2236);
  color: #ffffff;
  border-color: #163048;
  box-shadow: var(--shadow);
}

.use-case-panel p { color: var(--muted); }
.use-case-panel.emphasized p { color: rgba(255,255,255,0.74); }

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 22px;
}

.tag-list span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 6px;
  color: #b9cae0;
  background: rgba(86, 184, 214, 0.1);
  font-size: 13px;
  font-weight: 650;
}

.use-case-panel.emphasized .tag-list span {
  color: #ffffff;
  background: rgba(255,255,255,0.12);
}

/* ─── PAGE HERO (sub-pages) ─── */

.page-hero {
  padding: 80px 5vw 72px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.page-hero .eyebrow { margin-bottom: 18px; }

.page-hero h1 {
  max-width: 780px;
  font-size: clamp(34px, 5vw, 62px);
}

.page-hero .hero-sub {
  max-width: 620px;
  color: var(--muted);
  font-size: 19px;
  margin: 20px 0 0;
}

.page-hero .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ─── PLATFORM / LAYER DIAGRAM ─── */

.layer-diagram {
  max-width: 760px;
  margin: 0 auto;
}

.layer-diagram .arch-stack { box-shadow: none; }

.layer-diagram .arch-layer {
  padding: 22px 26px;
}

.layer-diagram .arch-layer-name {
  font-size: 18px;
}

/* ─── CAPABILITY FLOW (BangStream) ─── */

/* In-page sub navigation (Features / Architecture / Deployment / Demo) */
.sub-nav {
  position: sticky;
  top: 68px;
  z-index: 10;
  display: flex;
  gap: 4px;
  padding: 10px 5vw;
  border-bottom: 1px solid var(--line);
  background: rgba(14, 23, 38, 0.86);
  backdrop-filter: blur(18px);
  overflow-x: auto;
}

.sub-nav a {
  padding: 8px 14px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 680;
  white-space: nowrap;
  transition: color 0.15s, background 0.15s;
}

.sub-nav a:hover { color: var(--ink); background: rgba(255,255,255,0.05); }

/* Deployment status grid */
.status-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.status-block {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.status-block.status-current { border-top: 3px solid var(--green); }
.status-block.status-progress { border-top: 3px solid var(--amber); }
.status-block.status-future { border-top: 3px solid var(--teal); }

.status-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-size: 12px;
  font-weight: 760;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.status-current .status-head { color: var(--green); }
.status-progress .status-head { color: var(--amber); }
.status-future .status-head { color: var(--teal); }

.status-item {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.status-item:last-child { border-bottom: none; }

.status-mark {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
}

.status-current .status-mark { color: var(--green); }
.status-progress .status-mark,
.status-future .status-mark { color: var(--amber); }

.status-item h4 { margin: 0 0 2px; font-size: 15px; }
.status-item p { margin: 0; color: var(--muted); font-size: 13px; }

.not-in-scope {
  margin-top: 18px;
  padding: 22px 26px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 15px;
}

.not-in-scope strong { color: var(--ink); font-weight: 700; }

/* Code blocks (demo page) */
.code-block {
  margin: 0;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #0a1220;
  color: #cdddee;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 13px;
  line-height: 1.7;
  overflow-x: auto;
}

.code-block .k { color: #6ec9e3; }
.code-block .s { color: #ff8a3c; }
.code-block .c { color: #5d6f8c; font-style: italic; }

.shot-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.shot-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
  padding: 24px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}

/* Request demo form */
.form-page { max-width: 640px; padding: 80px 5vw; }

.form-page .lede {
  color: var(--muted);
  font-size: 19px;
  margin: 0 0 36px;
}

.form-field { margin-bottom: 22px; }

.form-field label,
.form-field .label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-size: 15px;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(86, 184, 214, 0.16);
}

.form-field textarea { min-height: 120px; resize: vertical; }

.radio-group { display: grid; gap: 10px; }

.radio-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.radio-option:hover { border-color: var(--teal); }
.radio-option input { accent-color: var(--teal); }
.radio-option span { font-size: 14px; }

.form-direct {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.form-direct a { color: var(--teal); font-weight: 680; }

/* Coming soon page */
.cs-page {
  max-width: 680px;
  padding: 96px 5vw;
}

.cs-badge {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 14px;
  margin-bottom: 24px;
  border-radius: 6px;
  background: rgba(255, 138, 60, 0.14);
  color: var(--amber);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cs-page .hero-sub {
  max-width: 580px;
  color: var(--muted);
  font-size: 19px;
  margin: 20px 0 0;
}

.cs-future {
  margin-top: 48px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.cs-future h3 { margin-bottom: 16px; }

.cs-future ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.cs-future li {
  padding-left: 18px;
  position: relative;
  color: #c4d2e6;
  font-size: 15px;
}

.cs-future li::before {
  content: "◦";
  position: absolute;
  left: 0;
  color: var(--teal);
  font-size: 18px;
  line-height: 1.2;
}

.cs-phase {
  margin-top: 24px;
  padding: 16px 20px;
  border-left: 3px solid var(--amber);
  background: var(--surface-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--muted);
  font-size: 14px;
}

/* ─── CAPABILITY FLOW (BangStream) ─── */

.capability-flow {
  display: grid;
  grid-template-columns: 1fr 32px 1fr 32px 1fr;
  align-items: center;
  gap: 0;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.flow-block {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.flow-block.flow-core {
  background: var(--teal);
  border-color: var(--teal);
  color: #0b1626;
}

.flow-block h4 {
  margin: 0 0 12px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-weight: 760;
}

.flow-block.flow-core h4 { color: rgba(11,22,38,0.72); }

.flow-block ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.flow-block li { font-size: 14px; color: #c4d2e6; }
.flow-block.flow-core li { color: rgba(11,22,38,0.9); }

.flow-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 18px;
}

/* ─── ROADMAP ─── */

.roadmap {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.roadmap-step {
  padding: 24px 22px;
  border-right: 1px solid var(--line);
  background: var(--surface);
}

.roadmap-step:last-child { border-right: none; }

.roadmap-step.active {
  background: rgba(86, 184, 214, 0.08);
  border-top: 2px solid var(--teal);
}

.roadmap-num {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--line);
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}

.roadmap-step.active .roadmap-num {
  background: var(--teal);
  color: #0b1626;
}

.roadmap-step h4 {
  margin: 0 0 6px;
  font-size: 15px;
}

.roadmap-step p {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

/* ─── ABOUT / COMPANY ─── */

.about {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.6fr);
  gap: 56px;
  align-items: start;
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 88px 5vw;
}

.about-copy p:not(.eyebrow) {
  max-width: 720px;
  color: var(--muted);
  font-size: 18px;
  margin: 16px 0 0;
}

.specialty-list {
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 8px;
  padding-top: 4px;
}

.specialty-list span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: #b9cae0;
  background: var(--surface-soft);
  font-size: 13px;
  font-weight: 650;
}

/* ─── CONTACT ─── */

.contact { padding-bottom: 96px; }

.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 32px;
  align-items: center;
  padding: 48px;
  border-radius: var(--radius);
  color: #ffffff;
  background:
    linear-gradient(135deg, rgba(86, 184, 214, 0.97), rgba(40, 110, 150, 0.95)),
    #163048;
  box-shadow: var(--shadow);
}

.contact-panel .eyebrow,
.contact-panel p { color: rgba(255,255,255,0.82); }

.contact-panel h2 { max-width: 680px; }

.contact-panel p {
  max-width: 640px;
  font-size: 18px;
  margin: 14px 0 0;
}

.contact-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 170px;
}

.contact-panel .button {
  color: #0b1626;
  background: #ffffff;
  box-shadow: none;
  white-space: nowrap;
}

.contact-panel .button:hover { background: #e6f2f8; }

.contact-panel .button-secondary {
  color: #ffffff;
  background: rgba(255,255,255,0.13);
  border-color: rgba(255,255,255,0.32);
}

.contact-panel .button-secondary:hover { background: rgba(255,255,255,0.2); }

/* Contact page standalone */

.contact-page {
  max-width: 640px;
  padding: 88px 5vw;
}

.contact-page h1 { margin-bottom: 14px; }

.contact-page .lede {
  color: var(--muted);
  font-size: 19px;
  margin: 0 0 36px;
}

.contact-detail {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.contact-detail .label {
  font-size: 12px;
  font-weight: 760;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 8px;
}

.contact-detail a {
  color: var(--teal);
  font-size: 18px;
  font-weight: 720;
}

.contact-detail a:hover { text-decoration: underline; }

/* ─── FOOTER ─── */

.site-footer {
  display: grid;
  grid-template-columns: minmax(160px, auto) 1fr;
  align-items: start;
  gap: 40px;
  padding: 40px 5vw;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.footer-col { display: flex; flex-direction: column; }

.footer-brand {
  font-weight: 760;
  color: var(--ink);
  font-size: 15px;
}

.footer-cols {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
}

.footer-head {
  margin: 0 0 12px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 760;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer-note {
  grid-column: 1 / -1;
  margin-top: 16px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.footer-nav {
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  gap: 2px;
}

.footer-nav a {
  padding: 4px 0;
  color: var(--muted);
  font-size: 13px;
  transition: color 0.15s;
}

.footer-nav a:hover { color: var(--ink); }

.footer-nav span {
  margin-left: 6px;
  padding: 1px 6px;
  border-radius: 4px;
  background: rgba(255, 138, 60, 0.16);
  color: var(--amber);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ─── HELPERS ─── */

.card-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }

/* Two-column section layout (applications page) */
.section-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.72fr);
  gap: 56px;
  align-items: start;
}

/* ─── RESPONSIVE ─── */

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
    gap: 40px;
    padding-top: 52px;
    padding-bottom: 64px;
  }

  .arch-visual { max-width: 560px; }
}

@media (max-width: 980px) {
  .site-header {
    flex-wrap: wrap;
    min-height: auto;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
    flex-wrap: nowrap;
  }

  .product-grid,
  .about,
  .section-split { grid-template-columns: 1fr; gap: 24px; }

  .status-grid,
  .shot-grid { grid-template-columns: 1fr; gap: 14px; }

  .sub-nav { top: auto; }

  .card-grid.three,
  .card-grid.two,
  .use-case-layout { grid-template-columns: 1fr; }

  .capability-flow {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .flow-arrow { transform: rotate(90deg); margin: 4px 0; }

  .roadmap { grid-template-columns: 1fr; }
  .roadmap-step { border-right: none; border-bottom: 1px solid var(--line); }
  .roadmap-step:last-child { border-bottom: none; }

  .contact-panel { grid-template-columns: 1fr; }
  .contact-actions { flex-direction: row; flex-wrap: wrap; }
}

@media (max-width: 640px) {
  .site-header { padding-left: 18px; padding-right: 18px; }

  .hero, .section, .page-hero, .about { padding-left: 18px; padding-right: 18px; }

  h1 { font-size: 38px; }

  .metrics { grid-template-columns: 1fr; }

  .contact-panel { padding: 28px 22px; }

  .site-footer { grid-template-columns: 1fr; padding-left: 18px; padding-right: 18px; }
  .footer-cols { gap: 28px; }
}