:root {
  --deep: #0B2A45;
  --deep-deep: #071B2C;
  --deep-soft: #123A5C;
  --cyan: #17E0D6;
  --cyan-deep: #0FB6AE;
  --amber: #F2B84B;
  --paper: #F4EFE4;
  --paper-2: #EDE6D8;
  --ink: #141A1F;
  --ink-soft: #3E4A54;
  --slate: #6E7B85;
  --warm: #D8C9B8;
  --mist: #BFE9E6;
  --white: #FFFFFF;

  --font-head: "Inter", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --r-sm: 4px;
  --r-md: 12px;
  --r-lg: 26px;
  --r-pill: 999px;

  --shadow-1: 0 1px 0 rgba(11, 42, 69, .06), 0 14px 32px -20px rgba(11, 42, 69, .45);
  --shadow-2: 0 22px 52px -26px rgba(11, 42, 69, .58);

  --shell-w: 1180px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --ease: cubic-bezier(.22, .61, .36, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  font-weight: 400;
  color: var(--ink);
  background-color: var(--paper);
  background-image: repeating-linear-gradient(0deg, rgba(11, 42, 69, .035) 0 1px, transparent 1px 72px);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; }
ul, ol { margin: 0; padding: 0; }
ul { list-style: none; }
dl, dd { margin: 0; }
hr { border: 0; }
[hidden] { display: none !important; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(11, 42, 69, .32);
}

#main-content { display: block; scroll-margin-top: clamp(88px, 16vh, 150px); }

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5 {
  margin: 0 0 .6em;
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -.015em;
  color: var(--deep);
}
h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); letter-spacing: -.03em; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); letter-spacing: -.02em; }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); line-height: 1.28; }
h4 { font-size: 1.05rem; letter-spacing: 0; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

.display {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(3.2rem, 7.6vw, 5.5rem);
  line-height: .95;
  letter-spacing: -.04em;
  color: var(--deep);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .05em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--slate);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  opacity: .65;
}

.lede {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  line-height: 1.72;
  color: var(--ink-soft);
  max-width: 60ch;
}

/* ---------- Layout ---------- */
.shell {
  width: min(var(--shell-w), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

.section { padding-block: clamp(2.5rem, 6vw, 5rem); }
.section--deep { background: var(--deep); color: var(--white); }
.section--deep h2,
.section--deep h3 { color: var(--white); }
.section--deep .eyebrow { color: var(--mist); }
.section--mist { background: linear-gradient(180deg, rgba(191, 233, 230, .55), rgba(191, 233, 230, .14)); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.grid { display: grid; gap: clamp(1rem, 2.4vw, 2rem); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.rule {
  height: 1px;
  margin-block: clamp(1.5rem, 3vw, 2.5rem);
  background: rgba(11, 42, 69, .14);
}

/* ---------- Buttons & tags ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  padding: .85rem 1.5rem;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-family: var(--font-head);
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .01em;
  text-decoration: none;
  transition: transform .18s var(--ease), background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--deep); color: var(--white); box-shadow: var(--shadow-1); }
.btn--primary:hover { background: var(--deep-soft); }
.btn--cyan { background: var(--cyan); color: var(--deep); }
.btn--cyan:hover { background: var(--cyan-deep); color: var(--deep-deep); }
.btn--ghost { background: transparent; border-color: rgba(11, 42, 69, .28); color: var(--deep); }
.btn--ghost:hover { border-color: var(--deep); background: rgba(11, 42, 69, .06); }
.btn--on-deep { background: transparent; border-color: rgba(191, 233, 230, .45); color: var(--white); }
.btn--on-deep:hover { border-color: var(--cyan); color: var(--cyan); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .3rem .7rem;
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  background: rgba(11, 42, 69, .08);
  color: var(--deep);
}
.tag--amber { background: rgba(242, 184, 75, .26); color: #7A5310; }
.tag--cyan { background: rgba(23, 224, 214, .2); color: #06605B; }

/* ---------- Cards ---------- */
.card {
  padding: clamp(1.1rem, 2.2vw, 1.75rem);
  background: var(--white);
  border: 1px solid rgba(11, 42, 69, .1);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-1);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-2); border-color: rgba(23, 224, 214, .62); }
.card--mist { background: linear-gradient(160deg, rgba(191, 233, 230, .75), rgba(244, 239, 228, .9)); }
.card--flat { box-shadow: none; }

/* ---------- Breadcrumbs ---------- */
.crumbs {
  margin: 0 0 1.75rem;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--slate);
}
.crumbs ol { display: flex; flex-wrap: wrap; gap: .45rem; }
.crumbs li { display: inline-flex; align-items: center; gap: .45rem; }
.crumbs li + li::before { content: "/"; opacity: .45; }
.crumbs a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.crumbs a:hover { color: var(--deep); border-bottom-color: var(--cyan); }
.crumbs [aria-current="page"] { color: var(--deep); }

/* ---------- Prose ---------- */
.prose {
  max-width: 68ch;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: var(--ink);
}
.prose > * + * { margin-top: 1em; }
.prose h2 { margin-top: 2em; }
.prose h3 { margin-top: 1.6em; }
.prose ul,
.prose ol { margin: 1em 0; padding-left: 1.25em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin: .4em 0; }
.prose a {
  color: var(--deep);
  text-decoration: none;
  border-bottom: 2px solid rgba(23, 224, 214, .55);
  padding-bottom: 1px;
  transition: border-color .16s var(--ease), color .16s var(--ease);
}
.prose a:hover { color: var(--deep-deep); border-bottom-color: var(--deep); }
.prose blockquote {
  margin: 1.6em 0;
  padding: .2em 0 .2em 1.2em;
  border-left: 3px solid var(--cyan);
  color: var(--ink-soft);
}

.note {
  padding: 1rem 1.15rem;
  background: var(--paper-2);
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  font-size: .95rem;
  line-height: 1.7;
  color: var(--ink-soft);
}
.note p:last-child { margin-bottom: 0; }

/* ---------- Media frames (for page-stage images) ---------- */
.media { margin: 0; }
.media__frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-md);
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #0B2A45 0%, #123A5C 55%, #0E4A5E 100%);
  box-shadow: var(--shadow-1);
}
.media__frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(191, 233, 230, .18) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(0deg, rgba(191, 233, 230, .12) 0 1px, transparent 1px 46px);
  opacity: .8;
  pointer-events: none;
}
.media__frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--wide .media__frame { aspect-ratio: 21 / 9; }
.media--tall .media__frame { aspect-ratio: 4 / 5; }
.media__caption {
  margin-top: .7rem;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--slate);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  color: var(--white);
  background: var(--deep);
  border-bottom: 1px solid rgba(191, 233, 230, .18);
  box-shadow: 0 20px 44px -32px rgba(7, 27, 44, .95);
}

.skip-link {
  position: absolute;
  top: -120px;
  left: 1rem;
  z-index: 120;
  padding: .65rem 1.1rem;
  border-radius: var(--r-sm);
  background: var(--cyan);
  color: var(--deep-deep);
  font-weight: 700;
  text-decoration: none;
  transition: top .18s var(--ease);
}
.skip-link:focus { top: .65rem; }

.header-strip {
  background: var(--deep-deep);
  border-bottom: 1px solid rgba(191, 233, 230, .14);
}
.header-strip__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .5rem 1.25rem;
  padding-block: .5rem;
}
.strip-status {
  display: flex;
  align-items: center;
  gap: .55rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--mist);
}
.dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(242, 184, 75, .2);
  animation: dot-pulse 2.8s ease-in-out infinite;
}
@keyframes dot-pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(242, 184, 75, .2); }
  50% { box-shadow: 0 0 0 7px rgba(242, 184, 75, .06); }
}
.strip-links { display: flex; flex-wrap: wrap; gap: .35rem 1.4rem; }
.strip-link {
  padding-block: .1rem;
  font-size: 13px;
  color: rgba(255, 255, 255, .78);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.strip-link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

.header-main {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: end;
  gap: 1.25rem clamp(1rem, 3vw, 2.5rem);
  padding-block: 1rem 1.1rem;
}

.brand { display: flex; flex-direction: column; gap: .55rem; min-width: 0; }
.brand__link {
  display: inline-flex;
  align-items: center;
  gap: .85rem;
  text-decoration: none;
  color: var(--white);
}
.brand__mark {
  position: relative;
  flex: none;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(150deg, var(--cyan) 0%, #0F9C95 72%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .22);
}
.brand__mark span {
  position: absolute;
  left: 10px;
  height: 3px;
  border-radius: 2px;
  background: var(--deep);
}
.brand__mark span:nth-child(1) { top: 12px; width: 18px; }
.brand__mark span:nth-child(2) { top: 19px; width: 12px; }
.brand__mark span:nth-child(3) { top: 26px; width: 6px; }

.brand__text { display: flex; flex-direction: column; gap: .18rem; min-width: 0; }
.brand__name {
  font-family: var(--font-head);
  font-size: clamp(1.15rem, 1.7vw, 1.4rem);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.1;
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: rgba(191, 233, 230, .82);
}
.brand__section {
  display: flex;
  align-items: center;
  gap: .55rem;
  margin: 0;
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--white);
}
.brand__section .mono {
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: rgba(191, 233, 230, .6);
}
.brand__section [data-current-label] {
  padding: .1rem .55rem;
  border-radius: var(--r-pill);
  background: rgba(23, 224, 214, .16);
  color: var(--cyan);
  font-weight: 600;
}

.header-side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: .85rem;
  min-width: 0;
}
.header-tools { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem .9rem; }

.tool-search {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .45rem .95rem;
  border: 1px solid rgba(23, 224, 214, .55);
  border-radius: var(--r-pill);
  background: rgba(23, 224, 214, .08);
  color: var(--cyan);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.tool-search:hover {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--deep-deep);
}
.tool-search__icon {
  position: relative;
  width: 12px;
  height: 12px;
  border: 2px solid currentColor;
  border-radius: 50%;
}
.tool-search__icon::after {
  content: "";
  position: absolute;
  right: -4px;
  bottom: -2px;
  width: 6px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transform: rotate(45deg);
}
.tool-link {
  font-size: 13.5px;
  color: rgba(255, 255, 255, .78);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, .24);
  padding-bottom: 1px;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.tool-link:hover { color: var(--cyan); border-color: var(--cyan); }

.site-nav { min-width: 0; }
.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: .15rem;
}
.nav-item { display: block; }
.nav-link {
  display: inline-block;
  padding: .42rem .78rem;
  border-radius: var(--r-sm);
  font-family: var(--font-head);
  font-size: .93rem;
  font-weight: 600;
  letter-spacing: .01em;
  color: rgba(255, 255, 255, .82);
  text-decoration: none;
  transition: color .16s var(--ease), background .16s var(--ease);
}
.nav-link:hover { color: var(--cyan); background: rgba(23, 224, 214, .1); }
.nav-link[aria-current="page"] {
  background: var(--cyan);
  color: var(--deep-deep);
  border-radius: var(--r-sm);
}
.nav-link[aria-current="page"]:hover { color: var(--deep-deep); background: var(--cyan); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: .6rem;
  padding: .5rem .9rem;
  border: 1px solid rgba(191, 233, 230, .45);
  border-radius: var(--r-pill);
  background: rgba(23, 224, 214, .08);
  color: var(--white);
  font-family: var(--font-head);
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .02em;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle__bars { display: grid; gap: 4px; width: 16px; }
.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--deep-deep);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child { transform: translateY(3px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child { transform: translateY(-3px) rotate(-45deg); }

.read-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(191, 233, 230, .16);
  pointer-events: none;
}
.read-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
  transition: width .12s linear;
}

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  margin-top: clamp(3rem, 7vw, 6rem);
  background: var(--deep);
  color: var(--white);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: auto -12% -55% 42%;
  height: 360px;
  background: radial-gradient(closest-side, rgba(23, 224, 214, .2), transparent 72%);
  pointer-events: none;
}

.footer-signal {
  position: relative;
  background: var(--deep-deep);
  border-bottom: 1px solid rgba(191, 233, 230, .16);
}
.footer-signal__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .5rem 1.5rem;
  padding-block: .7rem;
}
.footer-signal__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--cyan);
}
.footer-signal__items {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem 1.4rem;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: rgba(191, 233, 230, .78);
}

.footer-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.45fr .8fr .8fr 1.1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.footer-brand { display: flex; flex-direction: column; gap: .9rem; }
.footer-brand__line {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.25rem, 2.2vw, 1.75rem);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--white);
  max-width: 22ch;
}
.footer-brand__note {
  margin: 0;
  max-width: 30ch;
  font-size: .9rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, .68);
}

.footer-col { min-width: 0; }
.footer-col__title {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}
.footer-list { display: flex; flex-direction: column; gap: .15rem; }
.footer-link {
  display: inline-block;
  padding-block: .3rem;
  font-size: .95rem;
  color: rgba(255, 255, 255, .84);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), transform .16s var(--ease), border-color .16s var(--ease);
}
.footer-link:hover {
  color: var(--cyan);
  border-bottom-color: rgba(23, 224, 214, .6);
  transform: translateX(3px);
}
.footer-link--legal { font-size: 12.5px; color: rgba(255, 255, 255, .62); }

.contact-list { display: flex; flex-direction: column; gap: .7rem; }
.contact-row { display: grid; grid-template-columns: 3.2rem minmax(0, 1fr); gap: .5rem; }
.contact-key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: rgba(191, 233, 230, .62);
  padding-top: .2rem;
}
.contact-val {
  font-size: .93rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, .88);
  word-break: break-word;
}
.contact-val.mono { font-size: .88rem; }

.footer-base {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .6rem 1.5rem;
  padding-block: 1.15rem 1.35rem;
  border-top: 1px solid rgba(191, 233, 230, .16);
}
.footer-legal {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(255, 255, 255, .6);
}
.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem 1.25rem;
  align-items: center;
}

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .nav-link { padding: .4rem .6rem; font-size: .88rem; }
  .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; }
  .footer-contact { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .header-main {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: .75rem;
    padding-block: .8rem;
  }
  .nav-toggle { display: inline-flex; }
  .header-side {
    display: none;
    grid-column: 1 / -1;
    width: 100%;
    align-items: stretch;
    gap: 1rem;
  }
  .site-header[data-open="true"] .header-side {
    display: flex;
    flex-direction: column;
    padding-bottom: 1.15rem;
  }
  .site-header[data-open="true"] .header-tools { display: flex; }
  .header-tools { display: none; }
  [data-nav][data-open="true"] { width: 100%; }
  .nav-list {
    flex-direction: column;
    justify-content: flex-start;
    gap: 0;
    border-top: 1px solid rgba(191, 233, 230, .18);
  }
  .nav-link {
    display: block;
    padding: .95rem .2rem;
    font-size: 1.02rem;
    border-radius: 0;
    border-bottom: 1px solid rgba(191, 233, 230, .12);
  }
  .nav-link:hover { background: rgba(23, 224, 214, .08); }
  .nav-link[aria-current="page"] {
    background: transparent;
    color: var(--cyan);
    border-radius: 0;
    box-shadow: inset 3px 0 0 var(--cyan);
    padding-left: .85rem;
  }
  .brand__section { font-size: 12px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-contact { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .header-strip__inner { padding-block: .45rem; }
  .strip-status { font-size: 11.5px; letter-spacing: .02em; }
  .strip-links { gap: .3rem 1rem; }
  .grid--2,
  .grid--3 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.75rem; }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .contact-row { grid-template-columns: 2.6rem minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .btn:hover,
  .card:hover,
  .footer-link:hover { transform: none; }
}