/* Components: brand, navigation, HUD primitives, hero, cards, contact. */

/* Brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  min-height: var(--tap);
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: .24em;
  color: var(--text-strong);
  white-space: nowrap;
}
.brand-mark { width: 26px; height: 26px; filter: drop-shadow(0 0 6px var(--glow-cyan)); }
.brand-mark .mark-ring { stroke: var(--cyan); stroke-opacity: .85; }
.brand-mark .mark-core { fill: var(--magenta); }
.brand-dot { color: var(--magenta); }

/* Header surface: appears once the page scrolls or the menu opens (classes from main.js). */
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0;
  pointer-events: none;
  background: linear-gradient(90deg, transparent, var(--line-strong) 30%, rgba(255, 43, 214, .35) 70%, transparent) bottom / 100% 1px no-repeat, var(--header-bg);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
}
.site-header.is-scrolled::before, .site-header.menu-open::before { opacity: 1; }
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .site-header::before { background-color: var(--bg); }
}

/* Primary navigation */
nav { display: flex; align-items: center; gap: clamp(var(--space-4), 2.4vw, var(--space-6)); }
nav a, .nav-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  min-height: var(--tap);
  font-family: var(--font-display);
  font-size: .875rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--text);
}
nav a:not(.nav-contact)::after {
  content: "";
  position: absolute;
  inset: auto 0 9px;
  height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--glow-cyan);
  transform: scaleX(0);
  transform-origin: right;
}
nav a:hover, nav a:focus-visible { color: var(--text-strong); text-shadow: 0 0 12px var(--glow-cyan); }
nav a:not(.nav-contact):hover::after { transform: scaleX(1); transform-origin: left; }
.nav-contact, .nav-toggle {
  padding-inline: var(--space-4);
  border: 1px solid rgba(255, 43, 214, .55);
  background: rgba(255, 43, 214, .07);
  color: var(--text-strong);
}
.nav-contact:hover { border-color: var(--magenta); box-shadow: 0 0 18px -4px var(--glow-magenta), inset 0 0 12px -4px var(--glow-magenta); }
.nav-contact span[aria-hidden] { color: var(--magenta); font-size: 1rem; line-height: 1; }
.nav-toggle { display: none; cursor: pointer; }
.toggle-icon { position: relative; width: 16px; height: 8px; border-block: 1px solid var(--cyan); }
.nav-toggle[aria-expanded="true"] .toggle-icon { border-color: transparent; }
.nav-toggle[aria-expanded="true"] .toggle-icon::before,
.nav-toggle[aria-expanded="true"] .toggle-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--magenta);
  transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .toggle-icon::after { transform: rotate(-45deg); }

@media (max-width: 700px) {
  html:not(.js-enabled) nav { width: 100%; flex-wrap: wrap; gap: 0 var(--space-5); }
  html:not(.js-enabled) .nav-contact { padding: 0; border: 0; background: none; }

  .js-enabled .nav-toggle { display: inline-flex; }
  .js-enabled nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: var(--space-2) var(--gutter) var(--space-6);
    background: rgba(6, 9, 19, .96);
    border-bottom: 1px solid var(--line-strong);
    box-shadow: 0 24px 48px -24px rgba(0, 0, 0, .8);
    counter-reset: nav;
  }
  .js-enabled nav.is-open { display: flex; flex-direction: column; align-items: stretch; gap: 0; }
  .js-enabled nav a { min-height: 3.5rem; font-size: 1.125rem; border-bottom: 1px solid var(--line); counter-increment: nav; }
  .js-enabled nav a::before { content: "0" counter(nav); min-width: 2.25rem; font-size: .75rem; color: var(--magenta); }
  .js-enabled nav a::after { display: none; }
  .js-enabled nav .nav-contact { padding-inline: 0; border-width: 0 0 1px; border-color: var(--line); background: none; }
  .js-enabled nav .nav-contact span[aria-hidden] { margin-left: auto; }
}

/* Tablet: keep the full nav on one line next to the brand. */
@media (min-width: 701px) and (max-width: 1023px) {
  .brand { letter-spacing: .18em; }
  nav { gap: var(--space-4); }
  nav a, .nav-contact { font-size: .8125rem; letter-spacing: .1em; }
  .nav-contact { padding-inline: var(--space-3); }
}

/* Labels */
.section-label, .hud-readout, .scroll-cue, .card-index, .footer-bottom {
  font-family: var(--font-display);
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
}
.section-label { display: flex; align-items: center; gap: var(--space-3); color: var(--text-muted); }
.section-index { color: var(--magenta); text-shadow: 0 0 10px var(--glow-magenta); }
.section-index::after { content: "//"; margin-left: var(--space-3); color: var(--line-strong); text-shadow: none; }

/* HUD corner brackets: drawn with gradients so they need no extra markup. */
.hud { position: relative; }
.hud::before, .frame::before {
  --c: var(--hud-color, var(--cyan));
  --l: var(--hud-len, 18px);
  content: "";
  position: absolute;
  inset: var(--hud-inset, 0);
  z-index: 2;
  pointer-events: none;
  opacity: .85;
  background:
    linear-gradient(var(--c) 0 0) top left / var(--l) 1px,
    linear-gradient(var(--c) 0 0) top left / 1px var(--l),
    linear-gradient(var(--c) 0 0) top right / var(--l) 1px,
    linear-gradient(var(--c) 0 0) top right / 1px var(--l),
    linear-gradient(var(--c) 0 0) bottom left / var(--l) 1px,
    linear-gradient(var(--c) 0 0) bottom left / 1px var(--l),
    linear-gradient(var(--c) 0 0) bottom right / var(--l) 1px,
    linear-gradient(var(--c) 0 0) bottom right / 1px var(--l);
  background-repeat: no-repeat;
}

/* Hero */
.hud-readout { display: flex; align-items: center; gap: var(--space-3); padding-top: var(--space-4); color: var(--text-muted); }
.hud-readout--top { padding-left: var(--space-5); }
.led { width: 6px; height: 6px; background: var(--acid); box-shadow: 0 0 8px var(--acid); }
.hud-sep { width: 2rem; height: 1px; background: var(--line-strong); }

h1 { line-height: 1; }
.wordmark { position: relative; display: block; width: min(100%, 46rem); color: var(--text-strong); }
.wm {
  width: 100%;
  height: auto;
  overflow: visible;
  fill: none;
  stroke: currentColor;
  stroke-width: 5;
  stroke-linejoin: miter;
  stroke-miterlimit: 8;
}
.wm-base { position: relative; z-index: 1; filter: drop-shadow(0 0 6px rgba(0, 240, 255, .5)) drop-shadow(0 0 28px rgba(0, 240, 255, .22)); }
.wm-cyan, .wm-magenta { position: absolute; inset: 0; opacity: .75; }
.wm-cyan { color: var(--cyan); transform: translate(-2px, 0); }
.wm-magenta { color: var(--magenta); transform: translate(2px, 1px); }

.tagline {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
  font-family: var(--font-display);
  font-size: clamp(1rem, .85rem + .6vw, 1.375rem);
  font-weight: 500;
  letter-spacing: .26em;
  line-height: 1.4;
  text-transform: uppercase;
  color: var(--cyan);
  text-shadow: 0 0 14px var(--glow-cyan);
}
.tagline::before { content: ""; flex: 0 0 2rem; height: 2px; background: var(--magenta); box-shadow: 0 0 10px var(--glow-magenta); }
:lang(zh) .tagline { letter-spacing: .32em; }

.scroll-cue { justify-self: end; display: inline-flex; align-items: center; gap: var(--space-4); min-height: var(--tap); padding-right: var(--space-5); color: var(--text); }
.scroll-cue:hover { color: var(--text-strong); }
.cue-line { position: relative; width: 3.5rem; height: 1px; overflow: hidden; background: var(--line-strong); }
.cue-line::after { content: ""; position: absolute; inset: 0; width: 40%; background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }

@media (max-width: 700px) {
  .wm { stroke-width: 7; }
  .tagline { letter-spacing: .18em; }
  .tagline::before { flex-basis: 1.25rem; }
}

/* About */
.about-copy h2 { margin-top: var(--space-5); }
.lede { margin-top: var(--space-5); max-width: 40ch; font-size: var(--fs-lg); font-weight: 300; color: var(--text); }
.lede::before { content: "> "; font-family: var(--font-display); font-weight: 600; color: var(--acid); }

/* Direction cards */
.card {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas: "index icon" "title title";
  align-content: space-between;
  gap: var(--space-6) var(--space-4);
  min-height: 8.5rem;
  padding: var(--space-5);
  border: 1px solid var(--line);
  background: linear-gradient(155deg, rgba(0, 240, 255, .06), transparent 55%), var(--panel);
}
.card::before { content: ""; position: absolute; top: -1px; left: -1px; width: 2rem; height: 2px; background: var(--magenta); box-shadow: 0 0 10px var(--glow-magenta); }
.card-index { grid-area: index; color: var(--text-muted); }
.card-icon { grid-area: icon; width: 34px; height: 34px; stroke: var(--cyan); stroke-width: 1.25; color: var(--cyan); }
.card h3 { grid-area: title; }
.card::after {
  content: "";
  position: absolute;
  inset: -1px;
  pointer-events: none;
  opacity: 0;
  border: 1px solid var(--line-strong);
  box-shadow: 0 0 32px -12px var(--glow-cyan), inset 0 0 36px -18px var(--glow-cyan);
}
@media (hover: hover) {
  .card:hover::after { opacity: 1; }
  .card:hover .card-icon { filter: drop-shadow(0 0 6px var(--glow-cyan)); }
}
@media (min-width: 1024px) {
  .card { min-height: 0; padding: var(--space-6); }
}

/* Contact & footer */
.contact-panel {
  --hud-color: var(--magenta);
  --hud-len: 22px;
  display: grid;
  justify-items: start;
  gap: var(--space-5);
  width: min(100%, 44rem);
  padding: clamp(var(--space-6), 5vw, var(--space-8)) clamp(var(--space-5), 5vw, var(--space-8));
  background: linear-gradient(160deg, rgba(255, 43, 214, .08), transparent 55%), var(--panel);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.contact-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-5);
  min-height: var(--tap);
  max-width: 100%;
  margin-top: var(--space-3);
  padding-block: var(--space-2);
  border-bottom: 1px solid var(--line-strong);
  font-family: var(--font-display);
  font-size: clamp(1.375rem, 1rem + 1.8vw, 2.25rem);
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--text-strong);
  overflow-wrap: anywhere;
}
.contact-link > span:last-child { color: var(--magenta); }
.contact-link:hover { color: var(--cyan); border-color: var(--cyan); text-shadow: 0 0 16px var(--glow-cyan); }
.footer-bottom { color: var(--text-muted); }
.footer-bottom a { display: inline-flex; align-items: center; min-height: var(--tap); font-size: var(--fs-sm); font-weight: 700; color: var(--text-strong); }

/* Windows high contrast */
@media (forced-colors: active) {
  .hud::before, .frame::before, .card::before, .tagline::before { background: CanvasText; }
  .hud::before, .frame::before { display: none; }
  .card, .nav-contact, .nav-toggle, .contact-link { border-color: CanvasText; }
  .wm-cyan, .wm-magenta { display: none; }
  .site-header::before { background: Canvas; border-bottom: 1px solid CanvasText; }
}