/* ============================================================
   HELICYN — landing surface
   Dark instrument-panel system. Restrained. Engineered.
   ============================================================ */

:root {
  /* surface */
  --bg:        #08090b;
  --bg-1:      #0b0d10;
  --bg-2:      #0f1216;
  --bg-raise:  #12161b;

  /* hairlines */
  --line:      rgba(232, 238, 246, 0.085);
  --line-2:    rgba(232, 238, 246, 0.14);
  --line-soft: rgba(232, 238, 246, 0.045);

  /* ink */
  --text:      #eef2f7;
  --text-dim:  rgba(238, 242, 247, 0.58);
  --text-faint:rgba(238, 242, 247, 0.34);
  --text-ghost:rgba(238, 242, 247, 0.18);

  /* signal accent — cold blue, used sparingly */
  --signal:        oklch(0.74 0.13 240);
  --signal-soft:   oklch(0.74 0.13 240 / 0.16);
  --signal-line:   oklch(0.74 0.13 240 / 0.40);
  --signal-glow:   oklch(0.74 0.13 240 / 0.28);

  --font-sans: "Schibsted Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --maxw: 1280px;
  --gutter: clamp(1.5rem, 6vw, 6.5rem);
  --section-y: clamp(6.5rem, 15vh, 12rem);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-io: cubic-bezier(0.65, 0, 0.35, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.5;
  letter-spacing: -0.006em;
  overflow-x: hidden;
  cursor: default;
}

::selection { background: var(--signal-soft); color: var(--text); }

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

/* keyboard focus — visible signal ring */
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: 2px; }
:focus:not(:focus-visible) { outline: none; }
main:focus, main:focus-visible { outline: none; }

/* skip link */
.skip {
  position: fixed; top: 0; left: 0; z-index: 300;
  transform: translateY(-120%);
  margin: 0.6rem 0 0 var(--gutter);
  padding: 0.7rem 1.1rem;
  background: var(--bg-raise); border: 1px solid var(--signal-line); border-radius: 3px;
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text);
  transition: transform 0.3s var(--ease);
}
.skip:focus { transform: translateY(0); }

/* headings never push horizontal overflow on small screens */
h1, h2, h3 { overflow-wrap: break-word; }

/* ---- shared atoms ---------------------------------------- */

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  font-weight: 400;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--text-faint);
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--line-2);
}

/* index ticks (mono numbers) */
.tick { font-family: var(--font-mono); color: var(--text-ghost); font-size: 0.66rem; letter-spacing: 0.2em; }

/* ============================================================
   SCROLL PROGRESS
   ============================================================ */
.progress {
  position: fixed; top: 0; left: 0; height: 1px; width: 0%;
  background: linear-gradient(90deg, var(--signal-line), var(--signal));
  z-index: 200;
  transition: width 0.1s linear;
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: clamp(1.1rem, 2vh, 1.6rem) var(--gutter);
  transition: background 0.5s var(--ease), border-color 0.5s var(--ease), backdrop-filter 0.5s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border-bottom-color: var(--line);
}

.brand { display: inline-flex; align-items: center; gap: 0.72rem; }
.brand__mark { width: 18px; height: 18px; display: block; overflow: visible; }
.brand__mark circle { transition: transform 0.6s var(--ease); transform-origin: center; }
.brand:hover .brand__mark .ring { transform: scale(1.12); }
.brand__name {
  font-weight: 600; font-size: 0.94rem; letter-spacing: 0.22em;
  text-transform: uppercase;
}

.nav__right { display: flex; align-items: center; gap: clamp(1rem, 3vw, 2.4rem); }
.nav__meta {
  display: inline-flex; align-items: center; gap: 0.5rem;
  color: var(--text-faint);
}
.nav__meta .mono { color: var(--text-faint); }

.statusdot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 0 var(--signal-glow);
  animation: ping 3.4s var(--ease-io) infinite;
  flex: none;
}
@keyframes ping {
  0%   { box-shadow: 0 0 0 0 var(--signal-glow); opacity: 1; }
  60%  { box-shadow: 0 0 0 6px transparent; opacity: 0.7; }
  100% { box-shadow: 0 0 0 0 transparent; opacity: 1; }
}

.navlink {
  position: relative;
  font-size: 0.84rem; letter-spacing: 0.01em;
  color: var(--text-dim);
  display: inline-flex; align-items: center; gap: 0.45em;
  padding-block: 0.5rem;
  transition: color 0.4s var(--ease);
}
.navlink::after {
  content: ""; position: absolute; left: 0; bottom: -4px; height: 1px; width: 100%;
  background: currentColor; transform: scaleX(0); transform-origin: right;
  transition: transform 0.5s var(--ease);
}
.navlink:hover { color: var(--text); }
.navlink:hover::after { transform: scaleX(1); transform-origin: left; }
.navlink .arr { transition: transform 0.4s var(--ease); }
.navlink:hover .arr { transform: translate(2px, -2px); }

@media (max-width: 720px) { .nav__meta { display: none; } }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex; align-items: center;
  overflow: hidden;
}
#field {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block;
}
.hero__veil {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(120% 90% at 18% 42%, transparent 0%, transparent 38%, color-mix(in srgb, var(--bg) 70%, transparent) 78%, var(--bg) 100%),
    linear-gradient(180deg, color-mix(in srgb, var(--bg) 55%, transparent) 0%, transparent 22%, transparent 64%, var(--bg) 100%);
}
.reticle {
  position: absolute; top: 0; left: 0; width: 46px; height: 46px;
  pointer-events: none; z-index: 3; opacity: 0;
  transform: translate(-50%, -50%);
  transition: opacity 0.5s var(--ease);
  mix-blend-mode: screen;
}
.reticle::before, .reticle::after {
  content: ""; position: absolute; background: var(--signal-line);
}
.reticle::before { left: 50%; top: 0; bottom: 0; width: 1px; transform: translateX(-0.5px); }
.reticle::after  { top: 50%; left: 0; right: 0; height: 1px; transform: translateY(-0.5px); }

.hero__content { position: relative; z-index: 4; width: 100%; }
.hero__grid { display: grid; gap: clamp(1.6rem, 3vh, 2.4rem); max-width: 70ch; }

.hero h1 {
  font-weight: 500;
  font-size: clamp(2.5rem, 6vw, 5rem);
  line-height: 1.015;
  letter-spacing: -0.032em;
  text-wrap: balance;
}
.hero h1 .soft { color: var(--text-dim); }

.hero__sub {
  font-size: clamp(1.02rem, 1.55vw, 1.28rem);
  line-height: 1.55;
  color: var(--text-dim);
  max-width: 52ch;
  font-weight: 400;
}

.hero__cta { display: flex; align-items: center; gap: 1.6rem; flex-wrap: wrap; margin-top: 0.4rem; }

.btn {
  position: relative;
  display: inline-flex; align-items: center; gap: 0.7rem;
  white-space: nowrap;
  font-size: 0.86rem; letter-spacing: 0.02em;
  padding: 0.85rem 1.4rem;
  border: 1px solid var(--line-2);
  border-radius: 2px;
  color: var(--text);
  background: color-mix(in srgb, var(--bg-raise) 60%, transparent);
  transition: border-color 0.5s var(--ease), background 0.5s var(--ease), transform 0.3s var(--ease);
  overflow: hidden;
  will-change: transform;
}
.btn::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(120% 120% at 50% 120%, var(--signal-soft), transparent 70%);
  opacity: 0; transition: opacity 0.5s var(--ease);
}
.btn:hover { border-color: var(--signal-line); }
.btn:hover::after { opacity: 1; }
.btn .arr { transition: transform 0.4s var(--ease); }
.btn:hover .arr { transform: translateX(3px); }

.btn-ghost {
  font-size: 0.86rem; color: var(--text-dim);
  display: inline-flex; align-items: center; gap: 0.5rem;
  transition: color 0.4s var(--ease);
}
.btn-ghost:hover { color: var(--text); }
.btn-ghost .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--text-faint); transition: background 0.4s; }
.btn-ghost:hover .dot { background: var(--signal); }

/* scroll cue */
.scrollcue {
  position: absolute; bottom: clamp(1.4rem, 4vh, 2.6rem); left: var(--gutter);
  z-index: 4; display: flex; align-items: center; gap: 0.7rem;
  color: var(--text-faint);
}
.scrollcue__line { width: 1px; height: 34px; background: linear-gradient(var(--line-2), transparent); position: relative; overflow: hidden; }
.scrollcue__line::after {
  content: ""; position: absolute; top: -50%; left: 0; width: 1px; height: 50%;
  background: linear-gradient(transparent, var(--signal));
  animation: drip 2.6s var(--ease-io) infinite;
}
@keyframes drip { 0% { top: -55%; } 70%, 100% { top: 105%; } }

/* corner telemetry on hero */
.hero__coords {
  position: absolute; bottom: clamp(1.4rem, 4vh, 2.6rem); right: var(--gutter);
  z-index: 4; text-align: right; color: var(--text-faint);
  display: grid; gap: 0.35rem; line-height: 1.4;
}
@media (max-width: 720px) { .hero__coords { display: none; } }

/* ============================================================
   SECTION SCAFFOLD
   ============================================================ */
section { position: relative; }
.section { padding-block: var(--section-y); }
.section--line { border-top: 1px solid var(--line); }

.sec-head { display: grid; gap: 1.1rem; max-width: 60ch; }
.sec-head h2 {
  font-weight: 500; font-size: clamp(1.7rem, 3.2vw, 2.7rem);
  line-height: 1.08; letter-spacing: -0.025em; text-wrap: balance;
}

/* ---- MANIFESTO ------------------------------------------- */
.manifesto .wrap { display: grid; gap: clamp(2.4rem, 5vw, 4rem); grid-template-columns: minmax(0,1fr); }
.manifesto__lead {
  font-weight: 400;
  font-size: clamp(1.5rem, 3.1vw, 2.6rem);
  line-height: 1.28;
  letter-spacing: -0.02em;
  max-width: 24ch;
  text-wrap: balance;
}
.manifesto__body { display: grid; gap: 1.3rem; max-width: 58ch; color: var(--text-dim); font-size: clamp(1rem, 1.4vw, 1.18rem); line-height: 1.62; }
.manifesto__body .lift { color: var(--text); }
@media (min-width: 900px) {
  .manifesto .wrap { grid-template-columns: 0.95fr 1.05fr; align-items: start; }
}

/* ---- CAPABILITIES (abstract pillars) --------------------- */
.cap__head { margin-bottom: clamp(3rem, 6vh, 5rem); }

.cap__list { display: grid; }
.cap {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(1rem, 5vw, 4rem);
  padding-block: clamp(2rem, 4vh, 3rem);
  border-top: 1px solid var(--line);
  align-items: start;
  transition: background 0.6s var(--ease);
}
.cap:last-child { border-bottom: 1px solid var(--line); }
.cap__idx { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.2em; color: var(--text-ghost); padding-top: 0.5rem; transition: color 0.5s var(--ease); }
.cap__main { display: grid; grid-template-columns: minmax(0,1fr); gap: 1rem; }
@media (min-width: 860px) {
  .cap__main { grid-template-columns: 1.1fr 1.4fr; gap: clamp(2rem, 5vw, 5rem); align-items: baseline; }
}
.cap__name {
  font-size: clamp(1.5rem, 2.6vw, 2.1rem); font-weight: 500; letter-spacing: -0.02em; line-height: 1.05;
  display: flex; align-items: baseline; gap: 0.8rem;
}
.cap__name .glyph {
  width: 9px; height: 9px; flex: none; border: 1px solid var(--line-2); border-radius: 50%;
  transform: translateY(-2px); transition: border-color 0.5s var(--ease), background 0.5s var(--ease), box-shadow 0.5s var(--ease);
}
.cap__desc { color: var(--text-dim); font-size: clamp(1rem, 1.3vw, 1.12rem); line-height: 1.55; }
.cap__desc .lift { color: var(--text); }

.cap__sweep { position: absolute; left: 0; top: -1px; height: 1px; width: 0; background: var(--signal-line); transition: width 0.7s var(--ease); }
.cap:hover { background: linear-gradient(90deg, color-mix(in srgb, var(--bg-2) 60%, transparent), transparent 70%); }
.cap:hover .cap__sweep { width: 100%; }
.cap:hover .cap__idx { color: var(--text-dim); }
.cap:hover .cap__name .glyph { border-color: var(--signal); background: var(--signal); box-shadow: 0 0 12px var(--signal-glow); }

/* ---- STATUS BAND ----------------------------------------- */
.statusband {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg-1);
}
.statusband .wrap {
  display: flex; flex-wrap: wrap; gap: 1.2rem clamp(2rem, 6vw, 5rem);
  align-items: center; justify-content: space-between;
  padding-block: clamp(1.4rem, 3vh, 2.2rem);
}
.statusband__item { display: inline-flex; align-items: center; gap: 0.65rem; color: var(--text-faint); }
.statusband__item .label { color: var(--text-ghost); }
.statusband__item .val { color: var(--text-dim); font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.12em; }
.statusband__item .val.live { color: var(--text); }

/* ---- ACCESS / CONTACT ------------------------------------ */
.access .wrap { display: grid; gap: clamp(2rem, 4vw, 3rem); }
@media (min-width: 900px) { .access .wrap { grid-template-columns: 1fr 1fr; align-items: end; } }
.access h2 { font-weight: 500; font-size: clamp(1.8rem, 3.4vw, 2.8rem); letter-spacing: -0.025em; line-height: 1.08; max-width: 16ch; text-wrap: balance; }
.access p { color: var(--text-dim); margin-top: 1.1rem; max-width: 46ch; }

.form { display: grid; gap: 0.9rem; }
.field {
  display: flex; align-items: center; gap: 1rem;
  border-bottom: 1px solid var(--line-2);
  padding-bottom: 0.9rem;
  transition: border-color 0.5s var(--ease);
}
.field:focus-within { border-color: var(--signal-line); }
.field input {
  flex: 1; background: transparent; border: 0; outline: 0;
  color: var(--text); font-family: var(--font-sans); font-size: 1.05rem; letter-spacing: -0.01em;
}
.field input::placeholder { color: var(--text-faint); }
.field button {
  background: transparent; border: 0; cursor: pointer;
  color: var(--text-dim); font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.2em; text-transform: uppercase;
  display: inline-flex; align-items: center; gap: 0.5rem;
  transition: color 0.4s var(--ease);
}
.field button:hover { color: var(--text); }
.field button .arr { transition: transform 0.4s var(--ease); }
.field button:hover .arr { transform: translateX(3px); }
.form__note { font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.12em; color: var(--text-faint); min-height: 1.1em; transition: color 0.4s var(--ease); }
.form__note.ok { color: var(--signal); }
.form__note.err { color: oklch(0.7 0.13 35); }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { border-top: 1px solid var(--line); padding-block: clamp(3.5rem, 7vh, 6rem) clamp(2rem, 4vh, 3rem); }
.footer__top { display: grid; gap: clamp(2.4rem, 5vw, 4rem); }
@media (min-width: 820px) { .footer__top { grid-template-columns: 1.6fr 1fr; } }

.footer__brand { display: grid; gap: 1.1rem; align-content: start; }
.footer__brand .brand__name { font-size: 1.05rem; }
.footer__tagline { color: var(--text-dim); max-width: 30ch; font-size: 0.98rem; line-height: 1.5; }

.fcol { display: grid; gap: 0.85rem; align-content: start; }
.fcol h4 { font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.24em; text-transform: uppercase; color: var(--text-ghost); margin-bottom: 0.3rem; }
.fcol a, .fcol span { color: var(--text-dim); font-size: 0.94rem; transition: color 0.4s var(--ease); width: fit-content; }
.fcol a { position: relative; }
.fcol a::after { content: ""; position: absolute; left: 0; bottom: -3px; height: 1px; width: 100%; background: currentColor; transform: scaleX(0); transform-origin: right; transition: transform 0.45s var(--ease); }
.fcol a:hover { color: var(--text); }
.fcol a:hover::after { transform: scaleX(1); transform-origin: left; }

.footer__base {
  margin-top: clamp(3rem, 6vh, 5rem);
  padding-top: 1.6rem; border-top: 1px solid var(--line);
  display: flex; flex-wrap: wrap; gap: 0.8rem 2rem; align-items: center; justify-content: space-between;
  color: var(--text-faint);
}
.footer__base .mono { color: var(--text-faint); }

/* ============================================================
   REVEAL
   ============================================================ */
/* Reveals are JS-rAF tweened (inline opacity/transform), not CSS
   transitions — robust across throttled/compositor contexts.
   Base hidden only when JS is active, so no-JS shows everything. */
.js [data-reveal] { opacity: 0; transform: translateY(22px); will-change: opacity, transform; }
[data-reveal].is-visible { will-change: auto; }

/* ============================================================
   SMALL SCREENS
   ============================================================ */
@media (max-width: 640px) {
  body { font-size: 16px; }

  .nav { padding-block: 1rem; }
  .nav__right { gap: 0; }
  .navlink { padding-block: 0.7rem; }

  .hero { min-height: 100svh; padding-top: 4.5rem; }
  .hero h1 { font-size: clamp(2.05rem, 9vw, 2.9rem); letter-spacing: -0.028em; }
  /* let long words wrap rather than overflow on narrow screens */
  .hero h1 br, .hero h1 { hyphens: none; }
  .hero__sub { font-size: 1.02rem; }
  .hero__cta { gap: 1rem 1.4rem; }
  .btn { padding: 0.95rem 1.3rem; }

  .scrollcue { left: var(--gutter); }

  .manifesto__lead { font-size: clamp(1.5rem, 7vw, 2rem); max-width: none; }

  /* capability rows: number sits above the name on mobile */
  .cap { grid-template-columns: 1fr; gap: 0.4rem; }
  .cap__idx { padding-top: 0; }
  .cap__name { font-size: clamp(1.4rem, 7vw, 1.8rem); }

  /* access form: button drops below the field, full width tap target */
  .field { flex-wrap: wrap; gap: 1rem 0.5rem; }
  .field input { flex: 1 1 100%; font-size: 1.05rem; }
  .field button {
    flex: 1 1 100%; justify-content: space-between;
    border-top: 1px solid var(--line); padding-top: 0.95rem; padding-bottom: 0.55rem;
    min-height: 44px; align-items: center;
  }

  .footer__base { gap: 1rem; }
}

@media (max-width: 380px) {
  :root { --gutter: 1.25rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}