/* =============================================================
   AETHER landing — dark / phantom violet
   single-file css, no framework, no build step
   ============================================================= */

:root {
  --bg-0:      #0a0a0d;
  --bg-1:      #101015;
  --bg-2:      #14141b;
  --line:      rgba(255,255,255,.06);
  --line-2:    rgba(255,255,255,.10);

  --text:      #ece8f5;
  --text-2:    #b9b3ca;
  --text-3:    #7d7891;

  --accent:    #9673e6;     /* phantom violet — matches in-cheat palette */
  --accent-2:  #b59cf0;
  --accent-soft: rgba(150,115,230,.18);
  --cyan:      #5ac8dc;
  --warm:      #f0b464;
  --danger:    #f04b55;

  --radius:    14px;
  --radius-sm: 8px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --shadow:    0 8px 24px rgba(0,0,0,.45), 0 1px 2px rgba(0,0,0,.6);
  --shadow-lg: 0 20px 60px rgba(0,0,0,.55);

  --w:         1120px;
  --gap:       28px;
  --gap-lg:    72px;

  --font-sans: 'Inter', system-ui, -apple-system, Segoe UI, sans-serif;
  --font-mono: 'JetBrains Mono', SFMono-Regular, Consolas, monospace;
}

/* =================================================== reset / base */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg-0);
  color: var(--text);
  font: 16px/1.55 var(--font-sans);
  font-feature-settings: "ss01", "cv01";
  letter-spacing: -0.005em;
  overflow-x: hidden;
  min-height: 100vh;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { padding: 0; margin: 0; list-style: none; }
code {
  font: 0.86em var(--font-mono);
  color: var(--accent-2);
  background: rgba(150,115,230,.08);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid rgba(150,115,230,.14);
}
em { font-style: italic; color: var(--accent-2); }
.muted { color: var(--text-3); }

/* =================================================== ambient bg */
.bg {
  position: fixed; inset: 0; pointer-events: none;
  z-index: 0; overflow: hidden;
}
.bg__violet {
  position: absolute;
  width: 1100px; height: 1100px;
  top: -350px; left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle,
    rgba(150,115,230,.18) 0%,
    rgba(150,115,230,.05) 40%,
    transparent 70%);
  filter: blur(40px);
  animation: floatviolet 24s ease-in-out infinite;
}
@keyframes floatviolet {
  0%,100% { transform: translateX(-50%) translateY(0); }
  50%     { transform: translateX(-50%) translateY(40px); }
}
.bg__noise {
  position: absolute; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1, 0 0 0 0 1, 0 0 0 0 1, 0 0 0 0.5 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.45'/%3E%3C/svg%3E");
  opacity: 0.035;
  mix-blend-mode: overlay;
}
.bg__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(circle at 50% 0, black, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 50% 0, black, transparent 70%);
}

main { position: relative; z-index: 1; }

/* =================================================== nav */
.nav {
  position: sticky; top: 0;
  z-index: 50;
  display: flex; align-items: center; gap: 24px;
  padding: 18px max(20px, calc((100vw - var(--w)) / 2));
  backdrop-filter: blur(18px) saturate(1.1);
  -webkit-backdrop-filter: blur(18px) saturate(1.1);
  background: linear-gradient(180deg, rgba(10,10,13,.7), rgba(10,10,13,.45));
  border-bottom: 1px solid var(--line);
}
.nav__brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 700; letter-spacing: 0.18em;
  font-size: 0.92rem;
}
.nav__dot {
  width: 7px; height: 7px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { opacity: 0.7; transform: scale(1); }
  50%     { opacity: 1; transform: scale(1.18); }
}
.nav__name { color: var(--text); }
.nav__links {
  display: flex; gap: 22px;
  margin-left: auto;
  font-size: 0.88rem;
  color: var(--text-2);
}
.nav__links a { transition: color .15s; }
.nav__links a:hover { color: var(--text); }
.nav__cta {
  font-size: 0.85rem;
  padding: 8px 14px;
}
@media (max-width: 720px) {
  .nav__links { display: none; }
}

/* =================================================== buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  font: 500 0.92rem var(--font-sans);
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .12s ease, background .15s, border-color .15s, color .15s, box-shadow .2s;
  user-select: none;
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  color: #0c0a14;
  font-weight: 600;
  box-shadow:
    0 8px 22px rgba(150,115,230,.35),
    inset 0 1px 0 rgba(255,255,255,.25);
}
.btn--primary:hover {
  filter: brightness(1.06);
  box-shadow:
    0 10px 28px rgba(150,115,230,.5),
    inset 0 1px 0 rgba(255,255,255,.3);
}
.btn--ghost {
  background: rgba(255,255,255,.03);
  color: var(--text);
  border-color: var(--line-2);
}
.btn--ghost:hover {
  background: rgba(150,115,230,.08);
  border-color: rgba(150,115,230,.28);
}
.btn--lg { padding: 14px 26px; font-size: 1rem; }

/* =================================================== sections */
.section {
  padding: var(--gap-lg) max(20px, calc((100vw - var(--w)) / 2));
  position: relative;
}
.section--alt {
  background:
    linear-gradient(180deg, transparent, rgba(150,115,230,.025), transparent);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section__head {
  display: flex; align-items: baseline; gap: 18px;
  margin-bottom: 36px;
}
.section__num {
  font: 500 0.78rem var(--font-mono);
  color: var(--accent);
  letter-spacing: 0.18em;
}
.section h2 {
  margin: 0;
  font: 700 clamp(1.6rem, 3vw, 2.3rem) var(--font-sans);
  letter-spacing: -0.02em;
  color: var(--text);
}

/* =================================================== HERO */
.hero {
  padding: 120px max(20px, calc((100vw - var(--w)) / 2)) 100px;
  text-align: center;
  position: relative;
}
.hero__inner { max-width: 880px; margin: 0 auto; }
.hero__kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font: 500 0.78rem var(--font-mono);
  color: var(--text-3);
  letter-spacing: 0.12em;
  padding: 6px 14px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: rgba(255,255,255,.02);
  margin: 0 0 36px;
}
.pulse {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  animation: pulse 1.8s ease-in-out infinite;
}

.hero__wordmark {
  font: 900 clamp(3.2rem, 11vw, 8rem) var(--font-sans);
  letter-spacing: 0.18em;
  margin: 0 0 28px;
  line-height: 0.95;
  /* gradient on the parent — used by the spans via clip below */
  filter: drop-shadow(0 0 50px rgba(150,115,230,.25));
}
.hero__wordmark span {
  display: inline-block;
  animation: floatchar 6s ease-in-out infinite;
  /* per-span gradient text — has to be on the span itself because
     background-clip:text does not inherit through inline-block children */
  background-image: linear-gradient(180deg, #fff 0%, #b59cf0 55%, #6e54a8 100%);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
          color: transparent;
}
.hero__wordmark span:nth-child(1) { animation-delay: 0s; }
.hero__wordmark span:nth-child(2) { animation-delay: .12s; }
.hero__wordmark span:nth-child(3) { animation-delay: .24s; }
.hero__wordmark span:nth-child(4) { animation-delay: .36s; }
.hero__wordmark span:nth-child(5) { animation-delay: .48s; }
.hero__wordmark span:nth-child(6) { animation-delay: .60s; }
@keyframes floatchar {
  0%,100% { transform: translateY(0); }
  50%     { transform: translateY(-4px); }
}

.hero__tag {
  font: 400 clamp(1.05rem, 1.6vw, 1.25rem) var(--font-sans);
  color: var(--text-2);
  max-width: 540px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.hero__ctas {
  display: flex; justify-content: center; gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero__chips {
  display: flex; flex-wrap: wrap; gap: 10px;
  justify-content: center;
  font: 500 0.82rem var(--font-mono);
}
.hero__chips li {
  padding: 6px 12px;
  background: rgba(255,255,255,.03);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  color: var(--text-2);
}
.hero__chips b { color: var(--accent-2); font-weight: 600; }

/* =================================================== grid + cards */
.grid {
  display: grid;
  gap: var(--gap);
}
.grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
  padding: 28px;
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .25s, border-color .25s, box-shadow .25s;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 0),
    rgba(150,115,230,.08), transparent 50%);
  opacity: 0;
  transition: opacity .25s;
  pointer-events: none;
}
.card:hover {
  transform: translateY(-2px);
  border-color: rgba(150,115,230,.22);
  box-shadow: var(--shadow);
}
.card:hover::before { opacity: 1; }
.card h3 {
  margin: 0 0 14px;
  font: 600 1.1rem var(--font-sans);
  letter-spacing: -0.01em;
}
.card p { margin: 0 0 12px; color: var(--text-2); }
.card p:last-child { margin-bottom: 0; }

/* =================================================== features 4-col */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--gap);
}
.feat-col {
  padding: 22px;
  background: rgba(255,255,255,.015);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.feat-col h4 {
  margin: 0 0 14px;
  font: 600 0.78rem var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
}
.feat-col ul { display: flex; flex-direction: column; gap: 6px; }
.feat-col li {
  font-size: 0.92rem;
  color: var(--text-2);
  padding-left: 14px;
  position: relative;
}
.feat-col li::before {
  content: ""; position: absolute;
  left: 0; top: 0.55em;
  width: 4px; height: 4px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0.6;
}

/* =================================================== prose / dl */
.prose {
  max-width: 760px;
  font-size: 1rem;
  color: var(--text-2);
  line-height: 1.75;
}
.prose p { margin: 0 0 18px; }
.prose dl { margin: 28px 0 0; }
.prose dt {
  margin-top: 22px;
  font: 600 1rem var(--font-sans);
  color: var(--text);
  letter-spacing: -0.01em;
}
.prose dd { margin: 6px 0 0; padding-left: 0; }

/* =================================================== beta */
.beta {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 36px;
  align-items: start;
}
@media (max-width: 820px) {
  .beta { grid-template-columns: 1fr; }
}
.beta__copy { padding: 0; }
.beta .lede {
  font: 400 1.15rem var(--font-sans);
  color: var(--text);
  margin: 0 0 28px;
  line-height: 1.55;
}
.beta__how {
  display: flex; flex-direction: column; gap: 10px;
  margin: 0 0 32px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text-2);
}
.beta__how li {
  padding: 10px 14px;
  border-left: 2px solid var(--accent);
  background: rgba(150,115,230,.04);
  border-radius: 0 6px 6px 0;
}
.beta__cta { display: flex; gap: 14px; flex-wrap: wrap; }

.beta__notice {
  padding: 28px;
  background: rgba(240,75,85,.04);
  border: 1px solid rgba(240,75,85,.18);
  border-radius: var(--radius);
}
.beta__notice h4 {
  margin: 0 0 14px;
  font: 600 0.82rem var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--danger);
}
.beta__notice p { margin: 0 0 12px; color: var(--text-2); font-size: 0.92rem; }
.beta__notice p:last-child { margin: 0; }

/* =================================================== faq */
.faq {
  max-width: 760px;
  display: flex; flex-direction: column;
  gap: 8px;
}
.faq details {
  background: rgba(255,255,255,.018);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .15s;
}
.faq details[open] { border-color: rgba(150,115,230,.25); }
.faq summary {
  padding: 18px 22px;
  cursor: pointer;
  font: 500 1rem var(--font-sans);
  list-style: none;
  display: flex; justify-content: space-between; align-items: center;
  color: var(--text);
  transition: background .15s;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { background: rgba(150,115,230,.04); }
.faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1.2rem;
  transition: transform .2s;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p {
  padding: 0 22px 20px;
  color: var(--text-2);
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
}

/* =================================================== footer */
.footer {
  padding: 60px max(20px, calc((100vw - var(--w)) / 2)) 40px;
  border-top: 1px solid var(--line);
  background: var(--bg-1);
  position: relative;
  z-index: 1;
}
.footer__row {
  display: flex; justify-content: space-between;
  align-items: end;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.footer__brand {
  font: 700 1rem var(--font-sans);
  letter-spacing: 0.18em;
  margin: 0 0 4px;
}
.footer__links {
  display: flex; gap: 24px;
  font: 500 0.9rem var(--font-mono);
}
.footer__links a {
  color: var(--text-2);
  transition: color .15s;
}
.footer__links a:hover { color: var(--accent-2); }
.footer__small {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-3);
  line-height: 1.7;
}

/* =================================================== reveal-on-scroll */
@media (prefers-reduced-motion: no-preference) {
  .card,
  .feat-col,
  .faq details,
  .beta__notice,
  .beta__copy {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity .6s ease, transform .6s ease;
  }
  .is-in {
    opacity: 1 !important;
    transform: none !important;
  }
}