/* ═══════════════════════════════════════════════════════════════════
   ariaai.dev — enterprise tier (editorial restraint)
   ═══════════════════════════════════════════════════════════════════ */
:root {
  --bg: #09090b;
  --bg-1: #0d0d12;
  --bg-2: #121219;
  --surface: #15151c;
  --surface-hi: #1b1b24;
  --border: #25252f;
  --border-hi: #32323e;
  --fg: #ededf0;
  --fg-2: #b8b8c2;
  --fg-3: #85858f;
  --fg-4: #55555f;
  --accent: oklch(75% 0.18 295);
  --accent-2: oklch(68% 0.22 295);
  --ok: oklch(78% 0.15 155);
  --f-sans: "Inter var", Inter, system-ui, -apple-system, sans-serif;
  --f-mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  --page: 68rem;
  --gutter: clamp(1rem, 3vw, 2rem);
  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --r-sm: 6px;
  --r: 10px;
  --r-lg: 14px;
  --r-xl: 20px;
  color-scheme: dark;
}
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg); color: var(--fg);
  font-family: var(--f-sans); line-height: 1.55;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
code, pre { font-family: var(--f-mono); font-size: 0.92em; }
button { font: inherit; color: inherit; background: transparent; border: 0; cursor: pointer; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
::selection { background: color-mix(in oklch, var(--accent) 45%, transparent); color: #fff; }

/* ambient — subtler than the product site, more editorial */
.ambient { position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; }
.ambient__mesh {
  position: absolute; inset: -25%;
  background:
    radial-gradient(42% 32% at 18% 18%, color-mix(in oklch, var(--accent) 24%, transparent) 0%, transparent 70%),
    radial-gradient(35% 30% at 82% 82%, color-mix(in oklch, #0ea5e9 18%, transparent) 0%, transparent 70%);
  filter: blur(80px); opacity: 0.35;
}
.ambient__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(80% 70% at 50% 30%, #000 30%, transparent 100%);
}

/* nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 1.5rem;
  padding: 0.9rem max(1rem, calc((100vw - var(--page)) / 2 + 1rem));
  backdrop-filter: blur(14px) saturate(1.3);
  background: color-mix(in oklch, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav__brand { display: inline-flex; align-items: baseline; gap: 0.55rem; font-weight: 650; letter-spacing: -0.01em; font-size: 1rem; }
.nav__brand svg { transform: translateY(2px); }
.nav__tld { color: var(--accent); font-weight: 550; }
.nav__links { display: flex; gap: 1.35rem; margin: 0 auto; font-size: 0.92rem; color: var(--fg-2); }
.nav__links a { transition: color 0.18s var(--ease-out); }
.nav__links a:hover { color: var(--fg); }
@media (max-width: 720px) { .nav__links { display: none; } }

.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.7rem 1.1rem; border-radius: var(--r);
  font-weight: 550; font-size: 0.92rem; border: 1px solid transparent;
  transition: all 0.22s var(--ease-out);
}
.btn--primary {
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  color: #0a0a10;
  box-shadow: 0 10px 30px -10px color-mix(in oklch, var(--accent) 50%, transparent);
}
.btn--primary:hover { filter: brightness(1.05); }
.btn--secondary { background: var(--surface); border-color: var(--border-hi); color: var(--fg); }
.btn--secondary:hover { background: var(--surface-hi); }
.btn--ghost { border-color: var(--border); color: var(--fg-2); }
.btn--ghost:hover { color: var(--fg); border-color: var(--fg-4); }

main > section {
  max-width: var(--page); margin: 0 auto;
  padding: clamp(3rem, 8vw, 6rem) var(--gutter);
}

.section__head { max-width: 46rem; margin: 0 auto 2.5rem; text-align: center; }
.eyebrow {
  margin: 0 0 0.5rem;
  font-family: var(--f-mono); font-size: 0.7rem;
  letter-spacing: 0.22em; text-transform: uppercase; color: var(--accent); opacity: 0.9;
}
.section__head h2 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.7rem, 3.8vw, 2.5rem);
  font-weight: 680; letter-spacing: -0.03em; line-height: 1.1;
}
.grad {
  background: linear-gradient(90deg, var(--accent), #f0abfc 60%, #67e8f9);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.section__lead { max-width: 40rem; margin: 0 auto; color: var(--fg-2); font-size: 1rem; }

/* hero */
.hero {
  text-align: center;
  padding-top: clamp(4rem, 10vw, 7rem) !important;
  padding-bottom: clamp(3.5rem, 8vw, 5rem) !important;
}
.hero__status {
  display: inline-flex; align-items: center; gap: 0.55rem;
  padding: 0.35rem 0.85rem 0.35rem 0.7rem;
  border: 1px solid color-mix(in oklch, var(--accent) 30%, var(--border));
  background: color-mix(in oklch, var(--accent) 8%, transparent);
  color: var(--fg-2);
  font-family: var(--f-mono); font-size: 0.78rem;
  border-radius: 999px; margin-bottom: 1.4rem;
}
.status-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.8s var(--ease-out) infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in oklch, var(--accent) 55%, transparent); }
  70% { box-shadow: 0 0 0 8px color-mix(in oklch, var(--accent) 0%, transparent); }
  100% { box-shadow: 0 0 0 0 color-mix(in oklch, var(--accent) 0%, transparent); }
}
.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.4rem, 5.8vw, 4.2rem);
  font-weight: 700; letter-spacing: -0.035em; line-height: 1.03;
}
.hero__sub {
  max-width: 42rem; margin: 0 auto 1rem;
  color: var(--fg-2); font-size: 1.08rem;
}
.hero__sub strong { color: var(--fg); font-weight: 600; }
.hero__next {
  color: var(--fg-3); font-size: 0.92rem; margin: 0.3rem auto 1.75rem;
}
.pill {
  display: inline-block;
  font-family: var(--f-mono); font-size: 0.78rem;
  color: var(--accent);
  background: color-mix(in oklch, var(--accent) 10%, transparent);
  border: 1px solid color-mix(in oklch, var(--accent) 30%, var(--border));
  padding: 0.08rem 0.55rem; border-radius: 999px;
  margin: 0 0.15rem;
}
.hero__ctas {
  display: flex; gap: 0.7rem; justify-content: center; flex-wrap: wrap;
}

/* VISION — editorial pillars */
.pillars {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1rem; max-width: 56rem; margin: 0 auto;
}
@media (max-width: 840px) { .pillars { grid-template-columns: 1fr; } }
.pillar {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 1.4rem;
  position: relative; overflow: hidden;
  transition: border-color 0.22s var(--ease-out), transform 0.22s var(--ease-out);
}
.pillar:hover { border-color: var(--fg-4); transform: translateY(-2px); }
.pillar__n {
  font-family: var(--f-mono); font-size: 0.75rem;
  color: var(--accent); letter-spacing: 0.15em;
  margin-bottom: 0.7rem;
}
.pillar h3 { margin: 0 0 0.45rem; font-size: 1.1rem; letter-spacing: -0.01em; font-weight: 650; }
.pillar p { color: var(--fg-2); font-size: 0.93rem; margin: 0; }

/* TIERS */
.tier-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem; max-width: 62rem; margin: 0 auto;
}
@media (max-width: 960px) { .tier-grid { grid-template-columns: 1fr; } }
.tier {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 1.75rem 1.5rem 1.5rem;
  display: flex; flex-direction: column; gap: 1rem;
  position: relative;
  transition: border-color 0.22s var(--ease-out), transform 0.22s var(--ease-out);
}
.tier:hover { border-color: var(--fg-4); transform: translateY(-2px); }
.tier--featured {
  border-color: color-mix(in oklch, var(--accent) 50%, var(--border));
  background:
    radial-gradient(80% 50% at 50% 0%, color-mix(in oklch, var(--accent) 15%, transparent), transparent 70%),
    var(--surface);
  box-shadow: 0 30px 60px -30px color-mix(in oklch, var(--accent) 30%, transparent);
}
.tier--featured:hover { border-color: var(--accent); }
.tier__badge {
  position: absolute; top: -10px; left: 1.25rem;
  font-family: var(--f-mono); font-size: 0.7rem; letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #0a0a10;
  background: var(--accent);
  padding: 0.2rem 0.55rem; border-radius: 999px;
}
.tier header h3 { margin: 0 0 0.3rem; font-size: 1.1rem; letter-spacing: -0.01em; font-weight: 650; }
.tier__price { font-family: var(--f-mono); font-size: 1.5rem; color: var(--fg); letter-spacing: -0.01em; }
.tier__desc { margin: 0.3rem 0 0; color: var(--fg-3); font-size: 0.88rem; }
.tier__list {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 0.4rem;
  color: var(--fg-2); font-size: 0.92rem;
  flex: 1;
}
.tier__list li {
  padding-left: 0;
  font-variant-numeric: tabular-nums;
}

/* CONTACT */
.contact-card {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem; max-width: 54rem; margin: 0 auto;
}
@media (max-width: 760px) { .contact-card { grid-template-columns: 1fr; } }
.contact-card__link {
  display: flex; align-items: center; gap: 1rem;
  padding: 1.2rem 1.25rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg);
  transition: all 0.22s var(--ease-out);
}
.contact-card__link:hover {
  border-color: var(--accent); transform: translateY(-2px);
  box-shadow: 0 18px 40px -18px color-mix(in oklch, var(--accent) 35%, transparent);
}
.contact-card__icon {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  background: color-mix(in oklch, var(--accent) 15%, var(--bg-2));
  border: 1px solid color-mix(in oklch, var(--accent) 25%, var(--border));
  color: var(--accent);
  border-radius: var(--r-sm);
  font-size: 1.1rem; font-weight: 650;
  flex-shrink: 0;
}
.contact-card__k {
  font-family: var(--f-mono); font-size: 0.92rem; color: var(--fg);
  word-break: break-all;
}
.contact-card__v { color: var(--fg-3); font-size: 0.82rem; margin-top: 0.15rem; }

/* footer */
.footer {
  max-width: var(--page); margin: 2rem auto 0;
  padding: 2rem var(--gutter) 3rem;
  border-top: 1px solid var(--border);
  color: var(--fg-3); font-size: 0.88rem;
}
.footer__row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem;
}
.footer__brand { display: flex; align-items: center; gap: 0.5rem; color: var(--fg); font-weight: 600; font-family: var(--f-mono); font-size: 0.92rem; }
.footer__links { display: flex; gap: 1.1rem; flex-wrap: wrap; }
.footer__links a { transition: color 0.2s var(--ease-out); }
.footer__links a:hover { color: var(--fg); }
.footer__note { margin: 0; color: var(--fg-4); font-size: 0.82rem; max-width: 44rem; }
.footer__note a { color: var(--fg-2); }
.footer__note a:hover { color: var(--accent); }