/* ============================================================
   Stonepair — minimal dark tech
   Cool graphite surface · single mint-signal accent · OKLCH
   ============================================================ */

:root {
  --bg:        oklch(0.165 0.012 256);
  --bg-1:      oklch(0.198 0.013 256);
  --bg-2:      oklch(0.235 0.014 256);
  --bg-3:      oklch(0.275 0.015 256);

  --fg:        oklch(0.965 0.005 256);
  --fg-soft:   oklch(0.755 0.010 256);
  --fg-faint:  oklch(0.560 0.012 256);

  --line:      oklch(0.99 0.01 256 / 0.10);
  --line-2:    oklch(0.99 0.01 256 / 0.055);

  --accent:      oklch(0.840 0.150 178);   /* electric mint signal */
  --accent-soft: oklch(0.840 0.150 178 / 0.16);
  --accent-line: oklch(0.840 0.150 178 / 0.40);

  --maxw: 1200px;
  --gutter: clamp(1.25rem, 4vw, 3.5rem);

  --font: "Sora", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: clamp(1rem, 0.96rem + 0.18vw, 1.06rem);
  line-height: 1.6;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

canvas { display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
ul, ol { list-style: none; padding: 0; }
::selection { background: var(--accent); color: var(--bg); }

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

.mono {
  font-family: var(--mono); font-weight: 500;
  font-size: 0.72rem; letter-spacing: 0.04em; text-transform: uppercase;
}

/* shared heads */
.kicker {
  display: inline-block; font-family: var(--mono); font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent);
  margin-bottom: 1.1rem;
}
.head { margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.title {
  font-family: var(--font); font-weight: 700;
  font-size: clamp(1.9rem, 1.2rem + 2.8vw, 3.1rem);
  line-height: 1.05; letter-spacing: -0.03em; max-width: 18ch;
}
.head--split {
  display: grid; grid-template-columns: 1fr minmax(0, 32ch); gap: 2rem; align-items: end;
}
.head--split .title { max-width: none; }
.head__note { color: var(--fg-soft); font-size: 0.98rem; }

/* buttons */
.btn {
  --py: 0.7rem; --px: 1.2rem;
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: var(--py) var(--px);
  font-family: var(--font); font-weight: 500; font-size: 0.92rem; letter-spacing: -0.01em;
  border: 1px solid transparent; border-radius: 7px;
  transition: transform 0.4s var(--ease), background 0.3s, color 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.btn--lg { --py: 0.9rem; --px: 1.5rem; font-size: 0.98rem; }
.btn--block { width: 100%; justify-content: center; }
.btn--solid {
  background: var(--accent); color: oklch(0.18 0.02 256); font-weight: 600;
}
.btn--solid:hover { transform: translateY(-2px); box-shadow: 0 10px 30px -10px var(--accent-line); }
.btn--ghost { color: var(--fg); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--fg-soft); transform: translateY(-2px); }
.link-quiet { font-size: 0.92rem; color: var(--fg-soft); transition: color 0.25s; }
.link-quiet:hover { color: var(--fg); }

/* brand */
.brand { display: inline-flex; align-items: center; gap: 0.55rem; }
.brand__dot {
  width: 9px; height: 9px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 12px var(--accent-line);
}
.brand__word { font-weight: 600; font-size: 1.05rem; letter-spacing: -0.01em; }

/* ===================== NAV ===================== */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  border-bottom: 1px solid transparent; transition: background 0.4s, border-color 0.4s, backdrop-filter 0.4s;
}
.nav.is-stuck {
  background: oklch(0.165 0.012 256 / 0.7);
  backdrop-filter: blur(16px) saturate(1.3);
  border-bottom-color: var(--line);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.nav__links { display: flex; gap: 2rem; }
.nav__links a { font-size: 0.9rem; font-weight: 400; color: var(--fg-soft); transition: color 0.25s; }
.nav__links a:hover { color: var(--fg); }
.nav__actions { display: flex; align-items: center; gap: 1.4rem; }
.nav__toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; padding: 8px; }
.nav__toggle span { width: 22px; height: 2px; background: var(--fg); transition: 0.3s var(--ease); }
.nav__toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* ===================== HERO ===================== */
.hero {
  position: relative; min-height: 100svh;
  display: flex; flex-direction: column; justify-content: center;
  padding-top: 68px; overflow: hidden;
}
.hero__grid {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(var(--line-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-2) 1px, transparent 1px);
  background-size: 56px 56px;
  mask: radial-gradient(120% 90% at 70% 0%, black 30%, transparent 78%);
}
.hero__glow {
  position: absolute; z-index: 0; top: -25%; right: -10%;
  width: 70vw; height: 70vw; max-width: 900px; max-height: 900px;
  background: radial-gradient(circle, var(--accent-soft) 0%, transparent 62%);
  filter: blur(20px); pointer-events: none;
}
.hero__inner {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(2rem, 5vw, 4.5rem); align-items: center;
  padding-block: clamp(3rem, 8vh, 6rem);
}

.tag {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.04em;
  text-transform: uppercase; color: var(--fg-soft); margin-bottom: 1.7rem;
}
.tag__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: ping 2.6s var(--ease) infinite; }
.tag__sep { color: var(--fg-faint); }
@keyframes ping {
  0% { box-shadow: 0 0 0 0 var(--accent-line); }
  70%,100% { box-shadow: 0 0 0 8px oklch(0.84 0.15 178 / 0); }
}

.hero__title {
  font-weight: 700; font-size: clamp(2.5rem, 1.2rem + 5vw, 4.7rem);
  line-height: 1.02; letter-spacing: -0.038em; margin-bottom: 1.6rem;
}
.accent { color: var(--accent); }

.hero__lede { max-width: 46ch; font-size: clamp(1rem, 0.96rem + 0.4vw, 1.18rem); color: var(--fg-soft); margin-bottom: 2.2rem; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-bottom: 2.6rem; }

.hero__meta { display: flex; gap: clamp(1.5rem, 4vw, 3rem); border-top: 1px solid var(--line); padding-top: 1.5rem; }
.hero__meta b {
  display: block; font-weight: 700; font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  letter-spacing: -0.03em; line-height: 1;
}
.hero__meta span { font-size: 0.78rem; color: var(--fg-faint); margin-top: 0.4rem; display: block; }

/* console panel */
.console {
  background: oklch(0.185 0.013 256 / 0.7);
  border: 1px solid var(--line);
  border-radius: 12px; overflow: hidden;
  backdrop-filter: blur(8px);
  box-shadow: 0 30px 80px -40px oklch(0 0 0 / 0.7);
}
.console__bar {
  display: flex; align-items: center; gap: 0.8rem;
  padding: 0.7rem 1rem; border-bottom: 1px solid var(--line); background: oklch(0.21 0.013 256 / 0.6);
}
.console__dots { display: inline-flex; gap: 6px; }
.console__dots i { width: 9px; height: 9px; border-radius: 50%; background: var(--bg-3); }
.console__title { color: var(--fg-faint); flex: 1; }
.console__live { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--accent); font-size: 0.66rem; }
.live-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); animation: blink 1.4s steps(2, start) infinite; }
@keyframes blink { 50% { opacity: 0.25; } }

.console__body {
  font-family: var(--mono); font-size: 0.78rem; line-height: 1.9;
  padding: 1.1rem 1.1rem 0.6rem; min-height: 230px;
}
.log-line { white-space: pre-wrap; word-break: break-word; }
.log-line .ok { color: var(--accent); }
.log-line .pr { color: var(--fg-faint); }
.log-line .dim { color: var(--fg-faint); }
.cursor { color: var(--accent); animation: blink 1s steps(2,start) infinite; }

.console__foot {
  display: flex; align-items: center; gap: 1rem;
  padding: 0.7rem 1.1rem; border-top: 1px solid var(--line);
}
.console__spark { width: 100%; height: 30px; flex: 1; }
.console__rate { color: var(--fg-faint); white-space: nowrap; }

/* ticker */
.ticker {
  position: relative; z-index: 2;
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: center;
  padding-bottom: 1.6rem; color: var(--fg-faint); font-size: 0.66rem;
}
.ticker__sep { color: var(--accent); }
@media (max-width: 760px) { .ticker { display: none; } }

/* ===================== CAPABILITIES ===================== */
.cap { padding-block: clamp(5rem, 12vh, 8rem); border-top: 1px solid var(--line); }
.rows { display: grid; }
.row {
  display: grid;
  grid-template-columns: 60px minmax(8.5rem, 11rem) minmax(0, 1fr) minmax(0, 19ch);
  gap: clamp(1.2rem, 3vw, 2.8rem); align-items: start;
  padding: clamp(1.8rem, 3vw, 2.6rem) 0;
  border-top: 1px solid var(--line);
}
.row:last-child { border-bottom: 1px solid var(--line); }
.row__no { color: var(--accent); padding-top: 0.4rem; }
.row__name { font-weight: 600; font-size: clamp(1.25rem, 1rem + 0.9vw, 1.6rem); letter-spacing: -0.025em; line-height: 1.08; }
.row__desc { color: var(--fg-soft); font-size: 0.96rem; }
.row__tags { display: flex; flex-wrap: wrap; gap: 0.5rem; align-content: start; }
.row__tags li {
  font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.02em;
  padding: 0.35rem 0.6rem; border: 1px solid var(--line); border-radius: 5px; color: var(--fg-soft);
}

/* ===================== PLATFORM ===================== */
.platform { padding-block: clamp(5rem, 12vh, 8rem); background: var(--bg-1); border-top: 1px solid var(--line); }
.steps {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
  counter-reset: step;
}
.step {
  padding: clamp(1.6rem, 2.5vw, 2.2rem);
  border-right: 1px solid var(--line);
  position: relative; transition: background 0.4s var(--ease);
  counter-increment: step;
}
.step::before {
  content: counter(step, decimal-leading-zero);
  position: absolute; top: clamp(1.4rem, 2.3vw, 2rem); right: clamp(1.4rem, 2.3vw, 2rem);
  font-family: var(--mono); font-size: 0.78rem; color: var(--fg-faint);
}
.step:last-child { border-right: none; }
.step:hover { background: var(--bg-2); }
.step__k { color: var(--accent); display: block; margin-bottom: 2.5rem; font-size: 0.7rem; }
.step h4 { font-weight: 600; font-size: 1.15rem; letter-spacing: -0.02em; margin-bottom: 0.6rem; }
.step p { color: var(--fg-soft); font-size: 0.9rem; }

/* ===================== MODELS ===================== */
.models { padding-block: clamp(5rem, 12vh, 8rem); border-top: 1px solid var(--line); }
.models__lede { color: var(--fg-soft); margin-top: 1.2rem; max-width: 56ch; font-size: 1rem; }
.matrix {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1px; background: var(--line); border: 1px solid var(--line);
  border-radius: 12px; overflow: hidden; margin-top: clamp(2.5rem, 5vw, 3.5rem);
}
.cell { background: var(--bg); padding: 1.8rem 1.6rem 2rem; transition: background 0.4s var(--ease); }
.cell:hover { background: var(--bg-1); }
.cell__k { color: var(--accent); display: block; margin-bottom: 1rem; }
.cell p { color: var(--fg-soft); font-size: 0.92rem; }

/* ===================== PLANS ===================== */
.plans { padding-block: clamp(5rem, 12vh, 8rem); background: var(--bg-1); border-top: 1px solid var(--line); }
.plan-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 1.2rem; }
.plan {
  display: flex; flex-direction: column;
  background: var(--bg); border: 1px solid var(--line); border-radius: 12px;
  padding: 1.9rem 1.7rem; position: relative;
  transition: transform 0.5s var(--ease), border-color 0.5s;
}
.plan:hover { transform: translateY(-4px); border-color: var(--line); }
.plan--hot { border-color: var(--accent-line); box-shadow: 0 0 0 1px var(--accent-line), 0 30px 70px -40px var(--accent-line); }
.plan__flag {
  position: absolute; top: 0; right: 1.6rem; transform: translateY(-50%);
  background: var(--accent); color: oklch(0.18 0.02 256); font-weight: 600;
  padding: 0.3rem 0.65rem; border-radius: 5px; font-size: 0.6rem;
}
.plan__name { font-weight: 700; font-size: 1.4rem; letter-spacing: -0.02em; margin-bottom: 0.4rem; }
.plan__for { color: var(--fg-faint); font-size: 0.86rem; margin-bottom: 1.3rem; }
.plan__price { display: flex; align-items: baseline; gap: 0.35rem; padding-bottom: 1.3rem; margin-bottom: 1.3rem; border-bottom: 1px solid var(--line); }
.plan__price b { font-weight: 700; font-size: 2rem; letter-spacing: -0.03em; }
.plan__price span { color: var(--fg-faint); font-size: 0.85rem; }
.plan__feat { display: grid; gap: 0; flex: 1; margin-bottom: 1.6rem; }
.plan__feat li { position: relative; padding: 0.5rem 0 0.5rem 1.4rem; font-size: 0.88rem; color: var(--fg-soft); border-bottom: 1px solid var(--line-2); }
.plan__feat li::before { content: "→"; position: absolute; left: 0; top: 0.5rem; color: var(--accent); font-family: var(--mono); font-size: 0.8rem; }

/* ===================== CTA ===================== */
.cta { position: relative; padding-block: clamp(6rem, 14vh, 9rem); border-top: 1px solid var(--line); overflow: hidden; text-align: center; }
.cta .hero__grid { mask: radial-gradient(80% 80% at 50% 50%, black 20%, transparent 72%); }
.cta__inner { position: relative; z-index: 2; max-width: 640px; margin-inline: auto; }
.cta__title { font-weight: 700; font-size: clamp(2.2rem, 1.4rem + 3.4vw, 4rem); line-height: 1.02; letter-spacing: -0.035em; margin-bottom: 1.3rem; }
.cta__sub { color: var(--fg-soft); font-size: 1.08rem; max-width: 48ch; margin: 0 auto 2.4rem; }
.cta__form { display: flex; gap: 0.7rem; max-width: 460px; margin: 0 auto 1.2rem; }
.cta__form input {
  flex: 1; font: inherit; font-size: 1rem; padding: 0.9rem 1.1rem;
  background: var(--bg-1); border: 1px solid var(--line); border-radius: 8px; color: var(--fg);
  transition: border-color 0.3s, background 0.3s;
}
.cta__form input:focus { outline: none; border-color: var(--accent-line); background: var(--bg); }
.cta__form input::placeholder { color: var(--fg-faint); }
.cta__fine { color: var(--fg-faint); font-size: 0.64rem; text-transform: none; letter-spacing: 0.02em; }

/* ===================== FOOTER ===================== */
.foot { border-top: 1px solid var(--line); padding-top: clamp(3.5rem, 7vh, 5rem); }
.foot__inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr); gap: clamp(2.5rem, 5vw, 4rem); padding-bottom: 3.5rem; }
.foot__tag { margin-top: 1rem; color: var(--fg-faint); font-size: 0.92rem; max-width: 26ch; }
.foot__nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.foot__nav h5 { font-family: var(--mono); font-size: 0.66rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 1.1rem; }
.foot__nav a { display: block; padding: 0.32rem 0; font-size: 0.9rem; color: var(--fg-soft); transition: color 0.25s; }
.foot__nav a:hover { color: var(--fg); }
.foot__base { display: flex; justify-content: space-between; padding-block: 1.5rem; border-top: 1px solid var(--line); color: var(--fg-faint); }

/* ===================== REVEAL ===================== */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); transition-delay: calc(var(--rd, 0) * 85ms); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .tag__dot, .live-dot, .cursor { animation: none; }
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 940px) {
  .hero__inner { grid-template-columns: 1fr; }
  .console { max-width: 540px; }
  .head--split { grid-template-columns: 1fr; gap: 1.2rem; align-items: start; }
  .steps { grid-template-columns: 1fr 1fr; }
  .step:nth-child(2) { border-right: none; }
  .step:nth-child(1), .step:nth-child(2) { border-bottom: 1px solid var(--line); }
  .row { grid-template-columns: 50px 1fr; }
  .row__desc, .row__tags { grid-column: 2; }
}
@media (max-width: 760px) {
  .nav__links, .nav__actions .link-quiet { display: none; }
  .nav__toggle { display: flex; }
  .nav__links.is-open {
    display: flex; flex-direction: column; gap: 0;
    position: fixed; inset: 68px 0 auto 0; background: var(--bg);
    border-bottom: 1px solid var(--line); padding: 0.5rem var(--gutter) 1.5rem;
  }
  .nav__links.is-open a { padding: 0.9rem 0; font-size: 1.05rem; border-bottom: 1px solid var(--line-2); }
  .hero__meta { flex-wrap: wrap; gap: 1.2rem 2rem; }
  .steps { grid-template-columns: 1fr; }
  .step { border-right: none; border-bottom: 1px solid var(--line); }
  .step:last-child { border-bottom: none; }
  .step__k { margin-bottom: 1rem; }
  .row { grid-template-columns: 1fr; gap: 0.7rem; }
  .row__no { padding-top: 0; }
  .cta__form { flex-direction: column; }
  .foot__inner { grid-template-columns: 1fr; }
  .foot__nav { grid-template-columns: repeat(2, 1fr); }
  .foot__base { flex-direction: column; gap: 0.5rem; }
}