/* =========================================================
   Orbit — design system
   An observatory / orbital-mechanics aesthetic.
   ========================================================= */

/* -----------------------------------------------------------
   Tokens
----------------------------------------------------------- */
:root {
  /* Surfaces — deep, slightly warm indigo "space" */
  --bg-deep: #07091A;
  --bg-base: #0B0E22;
  --bg-elev: #11152C;
  --bg-card: #161B36;

  /* Ink — warm parchment cream, three weights */
  --ink: #EDE5D3;
  --ink-soft: #B4AE9E;
  --ink-mute: #6F6C5F;
  --ink-faint: #3A3A48;

  /* Hairlines */
  --rule: #232847;
  --rule-soft: #1A1E37;

  /* Accent — warm copper, like brass on an antique telescope */
  --copper: #D89E60;
  --copper-deep: #B07F44;
  --copper-glow: rgba(216, 158, 96, 0.18);

  /* Signal colors (sparingly) */
  --green: #8FB7A1;
  --rose: #C97D8A;

  /* Type */
  --font-display: "Fraunces", "Iowan Old Style", "Apple Garamond", Georgia, serif;
  --font-body: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Scale */
  --step--1: clamp(0.78rem, 0.76rem + 0.10vw, 0.84rem);
  --step-0:  clamp(0.94rem, 0.91rem + 0.15vw, 1.02rem);
  --step-1:  clamp(1.08rem, 1.03rem + 0.25vw, 1.22rem);
  --step-2:  clamp(1.28rem, 1.18rem + 0.50vw, 1.55rem);
  --step-3:  clamp(1.56rem, 1.36rem + 1.00vw, 2.10rem);
  --step-4:  clamp(2.00rem, 1.60rem + 2.00vw, 3.10rem);
  --step-5:  clamp(2.60rem, 1.90rem + 3.50vw, 4.60rem);
  --step-6:  clamp(3.40rem, 2.20rem + 6.00vw, 6.80rem);

  /* Rhythm */
  --gutter: clamp(1.25rem, 0.9rem + 2vw, 2.5rem);
  --rail: clamp(1rem, 0.6rem + 2.5vw, 3.5rem);
  --max: 78rem;

  /* Motion */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* -----------------------------------------------------------
   Reset / base
----------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; tab-size: 4; }
body {
  margin: 0;
  background: var(--bg-base);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.55;
  font-feature-settings: "ss01", "ss02", "cv11";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }

::selection { background: var(--copper); color: var(--bg-deep); }

/* Subtle film-grain overlay — texture for the "space" backdrop */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/><feColorMatrix values='0 0 0 0 1   0 0 0 0 1   0 0 0 0 1   0 0 0 0.6 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

/* Star-field — drifting faint dots behind everything */
body::after {
  content: "";
  position: fixed;
  inset: -10%;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(1px 1px at 12% 18%, rgba(237, 229, 211, 0.55), transparent 50%),
    radial-gradient(1px 1px at 78% 22%, rgba(237, 229, 211, 0.40), transparent 50%),
    radial-gradient(1px 1px at 32% 71%, rgba(237, 229, 211, 0.45), transparent 50%),
    radial-gradient(1px 1px at 88% 84%, rgba(237, 229, 211, 0.35), transparent 50%),
    radial-gradient(1px 1px at 53% 9%, rgba(216, 158, 96, 0.45), transparent 50%),
    radial-gradient(1px 1px at 67% 55%, rgba(237, 229, 211, 0.30), transparent 50%),
    radial-gradient(2px 2px at 22% 88%, rgba(237, 229, 211, 0.20), transparent 50%);
  background-repeat: no-repeat;
  animation: drift 90s linear infinite alternate;
}

@keyframes drift {
  0%   { transform: translate(0, 0); }
  100% { transform: translate(2%, 1%); }
}

main, header, footer { position: relative; z-index: 2; }

/* -----------------------------------------------------------
   Typography
----------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.012em;
  line-height: 1.05;
  margin: 0 0 0.5em;
  font-variation-settings: "opsz" 144, "SOFT" 50;
}
h1 { font-size: var(--step-6); }
h2 { font-size: var(--step-5); }
h3 { font-size: var(--step-3); }
h4 { font-size: var(--step-2); }

p { margin: 0 0 1em; max-width: 62ch; }
p.lede {
  font-family: var(--font-display);
  font-size: var(--step-3);
  line-height: 1.32;
  color: var(--ink);
  font-variation-settings: "opsz" 32, "SOFT" 100;
  font-style: italic;
  font-weight: 300;
  max-width: 36ch;
}

.mono, code, kbd, samp {
  font-family: var(--font-mono);
  font-size: 0.86em;
  letter-spacing: 0.01em;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--ink-mute);
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
}
.eyebrow::before {
  content: "";
  width: 0.65rem;
  height: 1px;
  background: var(--copper);
  display: inline-block;
}

.sec-num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--copper);
}

/* Pull-quotes / blockquotes */
blockquote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--step-3);
  line-height: 1.3;
  color: var(--ink);
  margin: 2em 0;
  padding-left: 1.2em;
  border-left: 1px solid var(--copper);
  max-width: 38ch;
}

/* -----------------------------------------------------------
   Layout
----------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--rail);
}

.section {
  padding-block: clamp(4rem, 3rem + 5vw, 8rem);
  position: relative;
}
.section--tight { padding-block: clamp(3rem, 2.5rem + 2vw, 5rem); }

.section-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: clamp(2.5rem, 2rem + 2vw, 4rem);
}
@media (min-width: 720px) {
  .section-head { grid-template-columns: 9rem 1fr; gap: 2rem; align-items: baseline; }
}

.section-head .sec-num { padding-top: 0.4em; }

/* Hairline rule with center mark — used as elegant section divider */
.rule {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0;
  color: var(--ink-faint);
}
.rule::before, .rule::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--rule) 20%, var(--rule) 80%, transparent);
}
.rule__mark {
  width: 14px;
  height: 14px;
  border: 1px solid var(--rule);
  transform: rotate(45deg);
  position: relative;
}
.rule__mark::before {
  content: "";
  position: absolute;
  inset: 4px;
  background: var(--copper);
  border-radius: 50%;
}

/* -----------------------------------------------------------
   Header / nav
----------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  background: color-mix(in oklab, var(--bg-deep) 70%, transparent);
  border-bottom: 1px solid var(--rule-soft);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding-block: 1rem;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.wordmark__mark {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
}
.wordmark__mark svg { width: 100%; height: 100%; }

.nav { display: flex; align-items: center; gap: 2rem; }
.nav__list {
  display: flex;
  gap: 1.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav__link {
  font-size: 0.92rem;
  color: var(--ink-soft);
  padding: 0.3rem 0;
  position: relative;
  transition: color 0.2s var(--ease);
}
.nav__link:hover { color: var(--ink); }
.nav__link[aria-current="page"] { color: var(--ink); }
.nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--copper);
}

.nav-toggle {
  display: none;
  width: 38px;
  height: 38px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  position: relative;
}
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 16px;
  height: 1px;
  background: var(--ink);
  transform: translateX(-50%);
  transition: transform 0.25s var(--ease);
}
.nav-toggle__bars { top: 50%; transform: translate(-50%, -50%); }
.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0;
         flex-direction: column; align-items: flex-start; gap: 0;
         padding: 1rem var(--rail) 2rem;
         background: var(--bg-deep);
         border-bottom: 1px solid var(--rule);
  }
  .nav.is-open { display: flex; }
  .nav__list { flex-direction: column; gap: 1rem; width: 100%; padding-block: 1rem; }
  .nav__link { font-size: 1.1rem; }
}

/* -----------------------------------------------------------
   Buttons
----------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.85rem 1.4rem;
  font-family: var(--font-body);
  font-size: 0.94rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--copper);
  color: var(--bg-deep);
}
.btn--primary:hover {
  background: #E5AF73;
  box-shadow: 0 8px 28px -10px var(--copper-glow);
}

.btn--ghost {
  border-color: var(--rule);
  color: var(--ink);
}
.btn--ghost:hover { border-color: var(--ink-soft); }

.btn--small { padding: 0.6rem 1rem; font-size: 0.86rem; }

.btn .arrow { transition: transform 0.25s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

/* -----------------------------------------------------------
   Cards
----------------------------------------------------------- */
.card {
  background: linear-gradient(180deg, var(--bg-elev), var(--bg-card));
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: clamp(1.5rem, 1.2rem + 1vw, 2.4rem);
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}
.card:hover {
  border-color: color-mix(in oklab, var(--copper) 50%, var(--rule));
  transform: translateY(-2px);
}
.card__label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 1rem;
}
.card__label .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--copper); }
.card h3 { font-size: var(--step-2); margin-bottom: 0.5rem; }
.card p { color: var(--ink-soft); margin-bottom: 0; }

/* Feature-card with side glyph */
.card--feat { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
@media (min-width: 760px) {
  .card--feat { grid-template-columns: 1fr 6rem; align-items: start; }
}
.card--feat svg { color: var(--copper); width: 6rem; height: 6rem; }

/* -----------------------------------------------------------
   Forms
----------------------------------------------------------- */
.field { display: grid; gap: 0.45rem; margin-bottom: 1.2rem; }
.field label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.input, .textarea {
  width: 100%;
  padding: 0.9rem 1.1rem;
  background: var(--bg-deep);
  border: 1px solid var(--rule);
  border-radius: 8px;
  color: var(--ink);
  font: inherit;
  font-size: 0.98rem;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.input:focus, .textarea:focus {
  outline: none;
  border-color: var(--copper);
  background: var(--bg-base);
}
.textarea { min-height: 9rem; resize: vertical; }

/* -----------------------------------------------------------
   Footer
----------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--rule-soft);
  padding-block: 4rem 2rem;
  margin-top: 6rem;
  position: relative;
}
.site-footer__inner {
  display: grid;
  gap: 3rem;
  grid-template-columns: 1fr;
}
@media (min-width: 720px) {
  .site-footer__inner { grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 2rem; }
}
.foot-brand p {
  color: var(--ink-mute);
  font-size: 0.92rem;
  margin-top: 1rem;
  max-width: 28ch;
}
.foot-col h5 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 1rem;
}
.foot-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.6rem; }
.foot-col a { color: var(--ink-soft); font-size: 0.94rem; }
.foot-col a:hover { color: var(--copper); }

.foot-bottom {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.foot-bottom .coords { color: var(--ink-faint); }

/* -----------------------------------------------------------
   Scroll-reveal
----------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  body::after { animation: none; }
}

/* -----------------------------------------------------------
   Misc utilities
----------------------------------------------------------- */
.muted { color: var(--ink-soft); }
.faint { color: var(--ink-mute); }
.copper { color: var(--copper); }

.grid-2 { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
@media (min-width: 720px) { .grid-2 { grid-template-columns: 1fr 1fr; gap: 2rem; } }
.grid-3 { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
@media (min-width: 720px) { .grid-3 { grid-template-columns: repeat(3, 1fr); gap: 1.5rem; } }