/* ==========================================================================
   vittr labs — vittr.ai
   Single-page site. Dark by design.
   ========================================================================== */

:root {
  /* ink */
  --bg:        #07080B;
  --bg-alt:    #0A0C11;
  --surface:   #0E1117;
  --surface-2: #12161E;
  --line:      rgba(255, 255, 255, .07);
  --line-2:    rgba(255, 255, 255, .12);

  /* type */
  --text:      #EDF0F5;
  --text-2:    #A6AEBD;
  --text-3:    #6E7686;

  /* signal */
  --mint:      #3DF5C5;
  --blue:      #5AA6FF;
  --violet:    #8B72FF;
  --grad:      linear-gradient(100deg, var(--mint), var(--blue) 52%, var(--violet));

  /* metrics */
  --wrap:      1160px;
  --r-sm:      10px;
  --r:         16px;
  --r-lg:      22px;
  --ease:      cubic-bezier(.22, 1, .36, 1);

  --font:      "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-dis:  "Inter Tight", "Inter", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: -.008em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
}

img, svg { max-width: 100%; }
h1, h2, h3 { font-family: var(--font-dis); font-weight: 600; letter-spacing: -.022em; line-height: 1.08; margin: 0; }
p { margin: 0; }

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

::selection { background: rgba(90, 166, 255, .28); color: #fff; }

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 12px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--surface-2);
  border: 1px solid var(--line-2);
  border-radius: var(--r-sm);
}
.skip:focus { left: 16px; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 24px;
}

/* --------------------------------------------------------------------------
   Background system
   -------------------------------------------------------------------------- */

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.bg-grid {
  position: absolute;
  inset: -2px;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 10%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 10%, transparent 78%);
}

.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .5;
  will-change: transform;
}
.bg-orb--a {
  width: 720px; height: 720px;
  top: -320px; left: 50%;
  margin-left: -520px;
  background: radial-gradient(circle, rgba(61,245,197,.20), transparent 68%);
  animation: drift-a 22s var(--ease) infinite alternate;
}
.bg-orb--b {
  width: 760px; height: 760px;
  top: -240px; left: 50%;
  margin-left: -140px;
  background: radial-gradient(circle, rgba(139,114,255,.22), transparent 68%);
  animation: drift-b 26s var(--ease) infinite alternate;
}
.bg-orb--c {
  width: 900px; height: 600px;
  top: 46%; left: 50%;
  margin-left: -450px;
  background: radial-gradient(circle, rgba(90,166,255,.10), transparent 70%);
  animation: drift-a 30s var(--ease) infinite alternate-reverse;
}

@keyframes drift-a { from { transform: translate3d(0,0,0) scale(1); } to { transform: translate3d(70px, 50px, 0) scale(1.12); } }
@keyframes drift-b { from { transform: translate3d(0,0,0) scale(1.06); } to { transform: translate3d(-80px, 40px, 0) scale(.94); } }

.bg-noise {
  position: absolute;
  inset: 0;
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* --------------------------------------------------------------------------
   Nav
   -------------------------------------------------------------------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  transition: background .3s var(--ease), border-color .3s var(--ease), backdrop-filter .3s;
  border-bottom: 1px solid transparent;
}
.nav.is-stuck {
  background: rgba(7, 8, 11, .72);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border-bottom-color: var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 72px;
}

.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand-mark { width: 30px; height: 25px; flex: none; }
.brand-name {
  font-family: var(--font-dis);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: -.02em;
}
.brand-sub {
  color: var(--text-3);
  font-weight: 500;
  margin-left: .34em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  font-size: 14.5px;
  color: var(--text-2);
}
.nav-links > a:not(.btn) {
  position: relative;
  transition: color .2s;
}
.nav-links > a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 1px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav-links > a:not(.btn):hover { color: var(--text); }
.nav-links > a:not(.btn):hover::after { transform: scaleX(1); }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  background: transparent;
  border: 1px solid var(--line-2);
  border-radius: var(--r-sm);
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 16px; height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .3s var(--ease), opacity .2s;
}
.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.25px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child  { transform: translateY(-3.25px) rotate(-45deg); }

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: -.01em;
  white-space: nowrap;
  border: 1px solid var(--line-2);
  color: var(--text);
  transition: transform .25s var(--ease), border-color .25s, background .25s, box-shadow .25s;
}
.btn:hover { transform: translateY(-1px); }
.btn-arrow { transition: transform .25s var(--ease); }
.btn:hover .btn-arrow { transform: translateX(3px); }

.btn--sm { padding: 9px 16px; font-size: 14px; }
.btn--lg { padding: 16px 28px; font-size: 16px; }

.btn--primary {
  position: relative;
  border-color: transparent;
  color: #05070A;
  font-weight: 600;
  background: var(--grad);
  box-shadow: 0 1px 0 rgba(255,255,255,.25) inset, 0 8px 30px -12px rgba(90,166,255,.7);
}
.btn--primary:hover { box-shadow: 0 1px 0 rgba(255,255,255,.3) inset, 0 14px 40px -12px rgba(90,166,255,.85); }

.btn--ghost {
  background: rgba(255,255,255,.02);
  color: var(--text-2);
}
.btn--ghost:hover { color: var(--text); border-color: rgba(255,255,255,.24); background: rgba(255,255,255,.045); }

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  padding-top: clamp(72px, 11vw, 140px);
  padding-bottom: 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 15px 7px 12px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: rgba(255,255,255,.025);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .01em;
  color: var(--text-2);
  margin-bottom: 30px;
}
.dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 0 rgba(61,245,197,.6);
  animation: pulse 2.6s ease-out infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(61,245,197,.55); }
  70%  { box-shadow: 0 0 0 8px rgba(61,245,197,0); }
  100% { box-shadow: 0 0 0 0 rgba(61,245,197,0); }
}

.hero-title {
  font-size: clamp(2.85rem, 7.4vw, 5.4rem);
  line-height: 1.04;
  letter-spacing: -.026em;
  word-spacing: .012em;
  font-weight: 600;
  max-width: 16ch;
}
.grad {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lede {
  margin-top: 28px;
  max-width: 62ch;
  font-size: clamp(1.02rem, 1.55vw, 1.2rem);
  line-height: 1.65;
  color: var(--text-2);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 40px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: clamp(64px, 9vw, 104px) 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
}
.stat {
  background: rgba(10, 12, 17, .6);
  backdrop-filter: blur(6px);
  padding: 26px 24px 28px;
}
.stat dt {
  font-family: var(--font-dis);
  font-size: clamp(1.5rem, 2.6vw, 1.95rem);
  font-weight: 600;
  letter-spacing: -.022em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat dd {
  margin: 9px 0 0;
  font-size: 13.8px;
  line-height: 1.5;
  color: var(--text-3);
}

/* ticker */
.ticker {
  margin-top: clamp(56px, 8vw, 88px);
  padding: 18px 0;
  border-block: 1px solid var(--line);
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, #000 12%, #000 88%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, #000 12%, #000 88%, transparent);
}
.ticker-track {
  display: flex;
  align-items: center;
  gap: 20px;
  width: max-content;
  animation: scroll 64s linear infinite;
}
.ticker-track span {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--text-3);
  white-space: nowrap;
}
.ticker-track i {
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--blue);
  opacity: .45;
  flex: none;
}
@keyframes scroll { to { transform: translateX(-50%); } }

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */

.section { padding: clamp(88px, 12vw, 148px) 0; }
.section--alt {
  background: linear-gradient(180deg, transparent, rgba(10,12,17,.75) 12%, rgba(10,12,17,.75) 88%, transparent);
}

.section-head { max-width: 68ch; margin-bottom: clamp(48px, 6vw, 72px); }

.kicker {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 18px;
}
.kicker::first-letter { color: var(--mint); }

.section-head h2 {
  font-size: clamp(1.95rem, 4.2vw, 3.05rem);
  letter-spacing: -.024em;
  word-spacing: .012em;
  line-height: 1.12;
  max-width: 20ch;
}
.section-lede {
  margin-top: 20px;
  font-size: clamp(1rem, 1.4vw, 1.11rem);
  color: var(--text-2);
  max-width: 60ch;
}

/* --------------------------------------------------------------------------
   Cards (services)
   -------------------------------------------------------------------------- */

.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.card, .pillar {
  position: relative;
  isolation: isolate;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(18,22,30,.72), rgba(10,12,17,.62));
  padding: 32px 30px 30px;
  overflow: hidden;
  transition: border-color .35s var(--ease), transform .35s var(--ease);
}
.card::before, .pillar::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0;
  transition: opacity .4s var(--ease);
  background: radial-gradient(320px circle at var(--mx, 50%) var(--my, 0%), rgba(90,166,255,.13), transparent 70%);
}
.card:hover, .pillar:hover { border-color: var(--line-2); transform: translateY(-3px); }
.card:hover::before, .pillar:hover::before { opacity: 1; }

.card-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: .06em;
}
.card h3 {
  margin-top: 16px;
  font-size: 1.4rem;
  letter-spacing: -.02em;
}
.card p {
  margin-top: 14px;
  color: var(--text-2);
  font-size: 15.3px;
  line-height: 1.68;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}
.tags li {
  font-family: var(--font-mono);
  font-size: 11.6px;
  letter-spacing: .01em;
  color: var(--text-3);
  padding: 5px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,.02);
}

/* --------------------------------------------------------------------------
   Steps (approach)
   -------------------------------------------------------------------------- */

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.step {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  padding: 38px 4px;
  border-bottom: 1px solid var(--line);
  transition: background .35s var(--ease);
}
.step:hover { background: rgba(255,255,255,.018); }

.step-meta { display: flex; align-items: baseline; gap: 16px; }
.step-num {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.step-when {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-3);
  letter-spacing: .04em;
  text-transform: uppercase;
}
.step-body h3 { font-size: 1.45rem; letter-spacing: -.02em; }
.step-body p {
  margin-top: 12px;
  color: var(--text-2);
  font-size: 15.6px;
  max-width: 62ch;
}

/* --------------------------------------------------------------------------
   Pillars + quote
   -------------------------------------------------------------------------- */

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.pillar { padding: 34px 30px 32px; }
.pillar-icon {
  width: 44px; height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-2);
  border-radius: 13px;
  background: rgba(255,255,255,.03);
  color: var(--mint);
  margin-bottom: 22px;
}
.pillar:nth-child(2) .pillar-icon { color: var(--blue); }
.pillar:nth-child(3) .pillar-icon { color: var(--violet); }
.pillar-icon svg { width: 21px; height: 21px; }
.pillar h3 { font-size: 1.3rem; }
.pillar p { margin-top: 13px; color: var(--text-2); font-size: 15.2px; line-height: 1.68; }

.quote {
  margin-top: clamp(48px, 6vw, 72px);
  padding: clamp(34px, 5vw, 52px) clamp(28px, 5vw, 60px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(120deg, rgba(61,245,197,.05), rgba(139,114,255,.05));
  position: relative;
  overflow: hidden;
}
.quote::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  border-radius: 2px;
  background: var(--grad);
}
.quote p {
  font-family: var(--font-dis);
  font-size: clamp(1.15rem, 2.2vw, 1.6rem);
  line-height: 1.42;
  letter-spacing: -.018em;
  color: var(--text);
  max-width: 46ch;
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   CTA + footer
   -------------------------------------------------------------------------- */

.cta {
  padding: clamp(96px, 13vw, 160px) 0;
  position: relative;
  text-align: center;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(ellipse 70% 100% at 50% 100%, rgba(90,166,255,.10), transparent 70%),
    radial-gradient(ellipse 50% 80% at 20% 0%, rgba(61,245,197,.055), transparent 70%);
}
.cta-inner { display: flex; flex-direction: column; align-items: center; }
.cta .kicker::first-letter { color: var(--mint); }
.cta h2 {
  font-size: clamp(2.2rem, 5.4vw, 3.9rem);
  letter-spacing: -.026em;
  word-spacing: .012em;
  line-height: 1.06;
}
.cta-lede {
  margin-top: 22px;
  max-width: 56ch;
  color: var(--text-2);
  font-size: clamp(1rem, 1.4vw, 1.1rem);
}
.cta-actions { margin-top: 38px; }
.cta-note {
  margin-top: 22px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-3);
}

.footer {
  border-top: 1px solid var(--line);
  background: rgba(7,8,11,.6);
  padding: 34px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.brand--sm .brand-mark { width: 26px; height: 22px; }
.brand--sm .brand-name { font-size: 17px; }
.footer-tag {
  font-size: 13.6px;
  color: var(--text-3);
}
.footer-meta {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 13.6px;
  color: var(--text-3);
}
.footer-meta a { transition: color .2s; }
.footer-meta a:hover { color: var(--text); }

/* --------------------------------------------------------------------------
   Reveal
   -------------------------------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  transition-delay: var(--d, 0ms);
}
.reveal.is-in { opacity: 1; transform: none; }

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 900px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .cards, .pillars { grid-template-columns: 1fr; }
  .step { grid-template-columns: 1fr; gap: 14px; padding: 30px 2px; }
  .step-meta { gap: 12px; }
}

@media (max-width: 760px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute;
    top: 72px;
    left: 12px; right: 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 14px;
    border: 1px solid var(--line-2);
    border-radius: var(--r);
    background: rgba(10, 12, 17, .96);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    box-shadow: 0 24px 60px -20px rgba(0,0,0,.85);
    font-size: 16px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s;
  }
  .nav-links.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav-links > a:not(.btn) { padding: 11px 12px; border-radius: var(--r-sm); }
  .nav-links > a:not(.btn)::after { display: none; }
  .nav-links > a:not(.btn):hover { background: rgba(255,255,255,.05); }
  .nav-links .btn { margin-top: 8px; justify-content: center; }

  .hero-title { max-width: none; }
  .hero-cta .btn { flex: 1 1 auto; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 16px; }
}

@media (max-width: 480px) {
  .wrap { padding-inline: 20px; }
  .stats { grid-template-columns: 1fr; }
  .stat { padding: 20px; }
  .card, .pillar { padding: 26px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}