/* ==========================================================================
   TDC -- design tokens
   Terminal-dark. One accent. Mono for anything the machine says.
   ========================================================================== */

:root {
  color-scheme: dark;

  --bg:        #0B0D10;
  --bg-1:      #101317;
  --bg-2:      #141920;
  --bg-3:      #1A2029;
  --line:      #232A33;
  --line-2:    #2E3742;

  --fg:        #E9EDF2;
  --fg-2:      #A3ADBA;
  --fg-3:      #6B7683;

  --accent:      #4ADE80;
  --accent-deep: #22C55E;
  --accent-wash: rgba(74, 222, 128, 0.09);
  --accent-line: rgba(74, 222, 128, 0.28);

  --warn:   #FBBF24;
  --danger: #F87171;
  --info:   #60A5FA;

  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", "Cascadia Code", "JetBrains Mono", Menlo, Consolas, monospace;

  --r-sm: 6px;
  --r:    10px;
  --r-lg: 16px;

  --gutter: clamp(1.25rem, 4vw, 2rem);
  --measure: 68ch;
  --section-y: clamp(4rem, 9vw, 7.5rem);
}

/* ==========================================================================
   Base
   ========================================================================== */

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg { max-width: 100%; height: auto; display: block; }

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.028em;
  color: var(--fg);
  text-wrap: balance;
}
h1 { font-size: clamp(2.4rem, 5.6vw, 4.1rem); letter-spacing: -0.038em; }
h2 { font-size: clamp(1.75rem, 3.4vw, 2.55rem); }
h3 { font-size: clamp(1.125rem, 1.7vw, 1.3rem); letter-spacing: -0.018em; }
h4 { font-size: 1rem; letter-spacing: -0.01em; }

p { margin: 0 0 1.15rem; color: var(--fg-2); max-width: var(--measure); }
p:last-child { margin-bottom: 0; }
strong { color: var(--fg); font-weight: 600; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

code, kbd, samp, pre { font-family: var(--mono); font-size: 0.9em; }
code {
  background: var(--bg-3); border: 1px solid var(--line);
  padding: 0.12em 0.42em; border-radius: var(--r-sm); color: var(--fg);
}

hr { border: 0; border-top: 1px solid var(--line); margin: 0; }
figure { margin: 0; }  /* UA default is 1em 40px, which breaks the left edge */
ul, ol { margin: 0; }

::selection { background: var(--accent); color: #06240F; }

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

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: #06240F; padding: 0.7rem 1.1rem;
  font-weight: 600; border-radius: 0 0 var(--r) 0;
}
.skip:focus { left: 0; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ==========================================================================
   Layout primitives
   ========================================================================== */

.wrap { width: 100%; max-width: 1140px; margin-inline: auto; padding-inline: var(--gutter); }
.wrap--narrow { max-width: 820px; }

.section { padding-block: var(--section-y); border-top: 1px solid var(--line); }
/* --flush always follows the hero, which carries its own bottom padding. */
.section--flush { border-top: 0; padding-top: clamp(1.5rem, 3vw, 2.75rem); }
.section--tint { background: linear-gradient(180deg, var(--bg-1), var(--bg)); }

.section__head { margin-bottom: clamp(2rem, 4vw, 3.25rem); }
.section__head p { font-size: 1.125rem; margin-top: 1.15rem; }

.kicker {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--mono); font-size: 0.72rem; font-weight: 500;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--fg-3); margin-bottom: 1rem;
}
.kicker::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 0 3px var(--accent-wash);
  flex: none;
}

.lede { font-size: clamp(1.0625rem, 1.6vw, 1.25rem); color: var(--fg-2); max-width: 62ch; }

.grid { display: grid; gap: 1.25rem; }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(276px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.stack > * + * { margin-top: 1.15rem; }

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  font-family: var(--sans); font-size: 0.9375rem; font-weight: 600;
  letter-spacing: -0.01em; line-height: 1;
  padding: 0.85rem 1.35rem; border-radius: var(--r);
  border: 1px solid transparent; cursor: pointer;
  transition: background-color .16s ease, border-color .16s ease, color .16s ease, transform .16s ease;
  text-decoration: none; white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }

.btn--primary { background: var(--accent); color: #06240F; }
.btn--primary:hover { background: #6EE79B; }

.btn--ghost { background: transparent; color: var(--fg); border-color: var(--line-2); }
.btn--ghost:hover { border-color: var(--fg-3); background: var(--bg-2); }

.btn--sm { padding: 0.6rem 1rem; font-size: 0.875rem; }

.btn-row { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; }

.arrow-link {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-weight: 600; font-size: 0.9375rem; color: var(--accent);
}
.arrow-link::after { content: "\2192"; transition: transform .16s ease; }
.arrow-link:hover { text-decoration: none; }
.arrow-link:hover::after { transform: translateX(3px); }

/* ==========================================================================
   Nav
   ========================================================================== */

.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 13, 16, 0.82);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  display: flex; align-items: center; gap: 1.5rem;
  height: 64px;
}
.brand {
  display: inline-flex; align-items: baseline; gap: 0.5rem;
  font-family: var(--mono); font-size: 1.0625rem; font-weight: 700;
  letter-spacing: 0.04em; color: var(--fg); text-decoration: none; flex: none;
}
.brand:hover { text-decoration: none; }
.brand__mark { color: var(--accent); }
.brand__sub {
  font-size: 0.68rem; font-weight: 500; letter-spacing: 0.12em;
  color: var(--fg-3); text-transform: uppercase;
}

.nav__links { display: flex; align-items: center; gap: 1.6rem; margin-left: auto; }
/* :not(.btn) matters -- a bare `.nav__links a` rule outranks `.btn--primary`
   and would repaint the CTA label grey on green. */
.nav__links a:not(.btn) {
  font-size: 0.9rem; font-weight: 500; color: var(--fg-2); text-decoration: none;
  transition: color .16s ease;
}
.nav__links a:not(.btn):hover { color: var(--fg); text-decoration: none; }
.nav__links a:not(.btn)[aria-current="page"] { color: var(--fg); }

.nav__toggle {
  display: none; margin-left: auto;
  background: transparent; border: 1px solid var(--line-2); color: var(--fg);
  border-radius: var(--r-sm); padding: 0.45rem 0.6rem; cursor: pointer;
  font-family: var(--mono); font-size: 0.8rem;
}

@media (max-width: 900px) {
  .nav__toggle { display: block; }
  .nav__links {
    position: absolute; inset: 64px 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg-1); border-bottom: 1px solid var(--line);
    padding: 0.5rem var(--gutter) 1.25rem; margin-left: 0;
  }
  .nav__links[hidden] { display: none; }
  .nav__links a { padding: 0.85rem 0; border-bottom: 1px solid var(--line); }
  .nav__links .btn { margin-top: 0.9rem; justify-content: center; }
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero { position: relative; padding-block: clamp(3.5rem, 8vw, 6.5rem) clamp(3rem, 6vw, 4.5rem); overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -30% -10% auto -10%; height: 620px;
  background: radial-gradient(50% 60% at 50% 0%, rgba(74, 222, 128, 0.10), transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
}
.hero > * { position: relative; }

.hero h1 { margin-bottom: 1.5rem; max-width: 16ch; }
.hero .lede { font-size: clamp(1.0625rem, 1.75vw, 1.3125rem); margin-bottom: 2rem; }
.hero .btn-row { margin-bottom: 1.5rem; }

.hero__note {
  font-size: 0.875rem; color: var(--fg-3); display: flex; align-items: center;
  gap: 0.5rem; flex-wrap: wrap; max-width: none;
}
.hero__note strong { color: var(--fg-2); font-weight: 500; }

.badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--accent);
  background: var(--accent-wash); border: 1px solid var(--accent-line);
  padding: 0.32rem 0.7rem; border-radius: 100px;
}
.badge--muted { color: var(--fg-3); background: var(--bg-2); border-color: var(--line); }

/* ==========================================================================
   Terminal
   ========================================================================== */

.term {
  background: #08090B;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: 0 24px 60px -30px rgba(0,0,0,.9), 0 0 0 1px rgba(255,255,255,.015);
}
.term__bar {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.7rem 0.95rem;
  background: var(--bg-2); border-bottom: 1px solid var(--line);
}
.term__dot { width: 10px; height: 10px; border-radius: 50%; background: var(--line-2); flex: none; }
.term__title {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.06em;
  color: var(--fg-3); margin-left: 0.5rem;
}
.term__body {
  padding: 1.25rem clamp(1rem, 3vw, 1.6rem);
  font-family: var(--mono); font-size: clamp(0.76rem, 1.5vw, 0.875rem);
  line-height: 1.95; color: var(--fg-2);
  overflow-x: auto;
}
.term__line { display: block; white-space: pre; }
.term__line--say { color: var(--fg); margin-bottom: 0.55rem; }
.term__line--gap { margin-top: 0.85rem; }
.tp { color: var(--accent); }
.tt { color: var(--info); }
.tc { color: var(--fg-3); }
.tok { color: var(--accent); }
.tw { color: var(--warn); }
.tu { color: var(--fg); }

.term__caption {
  font-size: 0.875rem; color: var(--fg-3); margin-top: 1rem; max-width: 58ch;
}

.js-seq .term__line { opacity: 0; transform: translateY(4px); }
.js-seq.is-running .term__line { animation: seqIn .34s ease forwards; }
@keyframes seqIn { to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) {
  .js-seq .term__line { opacity: 1; transform: none; animation: none !important; }
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
  background: var(--bg-2); border: 1px solid var(--line);
  border-radius: var(--r); padding: clamp(1.35rem, 2.4vw, 1.75rem);
  display: flex; flex-direction: column; gap: 0.7rem;
  transition: border-color .18s ease, background-color .18s ease;
}
.card:hover { border-color: var(--line-2); }
.card p { font-size: 0.9375rem; margin: 0; }
.card h3 { margin: 0; }

.card__idx {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em;
  color: var(--accent); text-transform: uppercase;
}
.card--accent { border-color: var(--accent-line); background: linear-gradient(180deg, var(--accent-wash), var(--bg-2) 60%); }

/* ==========================================================================
   Step rail
   ========================================================================== */

.steps { display: grid; gap: 0; border-left: 1px solid var(--line); margin-left: 15px; }
.step { position: relative; padding: 0 0 2.75rem 2.25rem; }
.step:last-child { padding-bottom: 0; }
.step::before {
  content: attr(data-n);
  position: absolute; left: -15px; top: 0;
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--bg); border: 1px solid var(--accent-line); color: var(--accent);
  font-family: var(--mono); font-size: 0.78rem; font-weight: 700;
  display: grid; place-items: center;
}
.step h3 { margin-bottom: 0.5rem; padding-top: 0.15rem; }
.step p { font-size: 0.9375rem; }

/* ==========================================================================
   Feature lists
   ========================================================================== */

.checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.85rem; }
.checks li {
  position: relative; padding-left: 1.75rem;
  font-size: 0.9375rem; color: var(--fg-2);
}
.checks li::before {
  content: "\2713"; position: absolute; left: 0; top: -0.05em;
  color: var(--accent); font-weight: 700; font-size: 0.95rem;
}
.checks strong { color: var(--fg); }

.crosses li::before { content: "\2715"; color: var(--fg-3); font-weight: 600; }

/* ==========================================================================
   Split tracks
   ========================================================================== */

.track {
  border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  background: var(--bg-1); display: flex; flex-direction: column; gap: 1.15rem;
}
.track--dev { background: var(--bg-2); }
.track h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
.track > .arrow-link { margin-top: auto; padding-top: 0.5rem; }

/* ==========================================================================
   Data table
   ========================================================================== */

.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r); }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; min-width: 620px; }
thead th {
  text-align: left; font-family: var(--mono); font-size: 0.7rem;
  letter-spacing: 0.13em; text-transform: uppercase; color: var(--fg-3);
  font-weight: 500; padding: 0.85rem 1rem; background: var(--bg-2);
  border-bottom: 1px solid var(--line); white-space: nowrap;
}
tbody td { padding: 0.8rem 1rem; border-bottom: 1px solid var(--line); color: var(--fg-2); vertical-align: top; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: var(--bg-1); }
td .mono { color: var(--fg); }
.mono { font-family: var(--mono); font-size: 0.86em; }
.mono--accent { color: var(--accent); }
.tag {
  display: inline-block; font-family: var(--mono); font-size: 0.68rem;
  letter-spacing: 0.08em; text-transform: uppercase; padding: 0.16rem 0.45rem;
  border-radius: 4px; border: 1px solid var(--line-2); color: var(--fg-3); white-space: nowrap;
}
.tag--w { color: var(--warn); border-color: rgba(251,191,36,.35); background: rgba(251,191,36,.07); }
.tag--r { color: var(--accent); border-color: var(--accent-line); background: var(--accent-wash); }

/* ==========================================================================
   Pricing
   ========================================================================== */

.plans { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); align-items: start; }
.plan {
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: var(--bg-2); padding: clamp(1.5rem, 2.6vw, 2rem);
  display: flex; flex-direction: column; gap: 1.15rem;
}
.plan--featured {
  border-color: var(--accent-line);
  background: linear-gradient(180deg, var(--accent-wash), var(--bg-2) 45%);
  box-shadow: 0 20px 50px -34px rgba(74,222,128,.5);
}
.plan__name { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); }
.plan__price { font-size: clamp(1.9rem, 3.4vw, 2.5rem); font-weight: 600; letter-spacing: -0.03em; line-height: 1; color: var(--fg); }
.plan__price small { display: block; font-size: 0.8125rem; font-weight: 400; color: var(--fg-3); letter-spacing: 0; margin-top: 0.5rem; }
.plan__for { font-size: 0.9375rem; color: var(--fg-2); margin: 0; }
.plan .checks li { font-size: 0.9rem; }
.plan .btn { width: 100%; }

.ph {
  display: inline-block; min-width: 5.5ch; text-align: center;
  font-family: var(--mono); color: var(--warn);
  background: rgba(251,191,36,.08); border: 1px dashed rgba(251,191,36,.4);
  border-radius: var(--r-sm); padding: 0 0.3em;
}

.note {
  border: 1px solid var(--line); border-left: 3px solid var(--accent);
  background: var(--bg-2); border-radius: 0 var(--r) var(--r) 0;
  padding: 1.1rem 1.35rem; font-size: 0.9375rem;
}
.note p { font-size: inherit; }
.note--warn { border-left-color: var(--warn); }
.note__label {
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.13em;
  text-transform: uppercase; color: var(--fg-3); display: block; margin-bottom: 0.4rem;
}

/* ==========================================================================
   FAQ
   ========================================================================== */

/* Constrain the reading column here rather than on the wrapper, so the FAQ's
   left edge still lines up with the nav and every other section. */
.faq { border-top: 1px solid var(--line); max-width: 820px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer; list-style: none; padding: 1.25rem 2.5rem 1.25rem 0;
  font-weight: 600; font-size: 1.0625rem; color: var(--fg); position: relative;
  letter-spacing: -0.015em;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 0.35rem; top: 50%; transform: translateY(-50%);
  font-family: var(--mono); font-size: 1.35rem; color: var(--accent); line-height: 1;
}
.faq details[open] summary::after { content: "\2212"; }
.faq summary:hover { color: var(--accent); }
.faq__body { padding: 0 0 1.5rem; }
.faq__body p { font-size: 0.9688rem; }

/* ==========================================================================
   Forms
   ========================================================================== */

.form { display: grid; gap: 1.15rem; max-width: 560px; }
.field { display: grid; gap: 0.45rem; }
.field label { font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.01em; color: var(--fg-2); }
.field input, .field select, .field textarea {
  font-family: var(--sans); font-size: 0.9375rem; color: var(--fg);
  background: var(--bg-2); border: 1px solid var(--line-2);
  border-radius: var(--r); padding: 0.75rem 0.9rem; width: 100%;
}
.field textarea { resize: vertical; min-height: 120px; line-height: 1.6; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--accent); outline: none; }
.field input::placeholder, .field textarea::placeholder { color: var(--fg-3); }
.field__hint { font-size: 0.8125rem; color: var(--fg-3); }

/* ==========================================================================
   Diagram
   ========================================================================== */

.diagram {
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: var(--bg-1); padding: clamp(1.25rem, 3vw, 2rem);
  overflow-x: auto;
}
.diagram figcaption { font-size: 0.875rem; color: var(--fg-3); margin-top: 1.15rem; max-width: 60ch; }

/* ==========================================================================
   Stats
   ========================================================================== */

.stats { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.stat { border-left: 2px solid var(--accent-line); padding-left: 1.1rem; }
.stat__n { font-size: clamp(1.6rem, 3vw, 2.1rem); font-weight: 600; letter-spacing: -0.03em; color: var(--fg); line-height: 1.1; font-family: var(--mono); }
.stat__l { font-size: 0.875rem; color: var(--fg-3); margin-top: 0.4rem; }

/* ==========================================================================
   CTA band
   ========================================================================== */

.cta {
  border: 1px solid var(--accent-line); border-radius: var(--r-lg);
  background: linear-gradient(140deg, var(--accent-wash), var(--bg-2) 55%);
  padding: clamp(2rem, 5vw, 3.25rem);
  text-align: center; display: grid; gap: 1.35rem; justify-items: center;
}
.cta h2 { max-width: 20ch; }
.cta p { max-width: 52ch; }
.cta .btn-row { justify-content: center; }

/* ==========================================================================
   Footer
   ========================================================================== */

.footer { border-top: 1px solid var(--line); background: var(--bg-1); padding-block: clamp(2.75rem, 6vw, 4rem) 2rem; }
.footer__grid { display: grid; gap: 2.25rem; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); margin-bottom: 2.75rem; }
.footer__brand { grid-column: 1 / -1; }
@media (min-width: 760px) { .footer__brand { grid-column: span 2; max-width: 320px; } }
.footer__brand p { font-size: 0.9rem; margin-top: 0.9rem; }
.footer h4 { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-3); font-weight: 500; margin-bottom: 1rem; }
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.65rem; }
.footer ul a { font-size: 0.9rem; color: var(--fg-2); text-decoration: none; }
.footer ul a:hover { color: var(--accent); text-decoration: none; }
.footer__base {
  border-top: 1px solid var(--line); padding-top: 1.75rem;
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between;
  font-size: 0.8125rem; color: var(--fg-3);
}
.footer__base p { font-size: inherit; margin: 0; color: inherit; }

/* ==========================================================================
   Reveal on scroll
   ========================================================================== */

.js-reveal [data-reveal] { opacity: 0; transform: translateY(14px); }
.js-reveal [data-reveal].is-in { opacity: 1; transform: none; transition: opacity .5s ease, transform .5s cubic-bezier(.2,.7,.3,1); }
@media (prefers-reduced-motion: reduce) {
  .js-reveal [data-reveal] { opacity: 1 !important; transform: none !important; transition: none !important; }
}