/* FUTUR inc. — "operator's console, printed on paper".
   Cream paper with a dot grid, near-black ink, one teal, one amber.
   Sharp corners, hard offset shadows, mono for every piece of metadata. */

:root {
  --paper: #f4efe6;
  --paper-2: #ebe4d7;
  --card: #fbf8f2;
  --ink: #14131a;
  --muted: #625d57;
  --line: #d6cdbe;
  --dot: rgba(20, 19, 26, .22);
  --gridline: rgba(20, 19, 26, .07);
  --accent: #f29b1d;        /* the plus in the wordmark */
  --accent-deep: #a95f05;   /* same hue, dark enough for small text on paper */
  --accent-ink: #14131a;
  --accent-soft: #fbe8cf;
  --warn: #5f7d93;          /* cool slate: holds and demotions */
  --ledger-bg: #14131a;
  --ledger-ink: #ece7dc;
  --ledger-dim: #8a857c;
  --ledger-ok: #f5a83a;
  --ledger-warn: #8fb3c9;
  --hard: 4px 4px 0 var(--line);
  --hard-ink: 3px 3px 0 var(--ink);
  --r: 3px;
  --gutter: 16px;
  --measure: 60ch;
  --sans: "Geist", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #101015; --paper-2: #16161d; --card: #17171e;
    --ink: #ece7dc; --muted: #9d978e; --line: #2b2a34; --dot: rgba(236, 231, 220, .16); --gridline: rgba(236, 231, 220, .05);
    --accent: #f5a52c; --accent-deep: #f5a52c; --accent-ink: #14131a; --accent-soft: #3a2a12; --warn: #8fb3c9;
    --ledger-bg: #07070a; --hard: 4px 4px 0 var(--line); --hard-ink: 3px 3px 0 var(--accent-deep);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #101015; --paper-2: #16161d; --card: #17171e;
  --ink: #ece7dc; --muted: #9d978e; --line: #2b2a34; --dot: rgba(236, 231, 220, .16); --gridline: rgba(236, 231, 220, .05);
  --accent: #f5a52c; --accent-deep: #f5a52c; --accent-ink: #14131a; --accent-soft: #3a2a12; --warn: #8fb3c9;
  --ledger-bg: #07070a; --hard: 4px 4px 0 var(--line); --hard-ink: 3px 3px 0 var(--accent-deep);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; color: var(--ink); font-family: var(--sans); font-size: 17px; line-height: 1.6;
  background-color: var(--paper);
  background-image:
    radial-gradient(var(--dot) 1.2px, transparent 1.6px),
    linear-gradient(var(--gridline) 1px, transparent 1px),
    linear-gradient(90deg, var(--gridline) 1px, transparent 1px);
  background-size: 24px 24px, 120px 120px, 120px 120px;
  background-position: 12px 12px, 0 0, 0 0;
  counter-reset: sec;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--accent-deep); text-decoration-thickness: 1px; text-underline-offset: 3px; }
h1, h2, h3 { line-height: 1.05; letter-spacing: -0.03em; margin: 0 0 .6em; font-weight: 700; }
h1 { font-size: clamp(2.5rem, 6.5vw, 4.6rem); letter-spacing: -0.04em; }
h2 { font-size: clamp(1.8rem, 4.2vw, 2.8rem); }
h3 { font-size: 1.15rem; font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0 0 1em; max-width: var(--measure); }
.lede { font-size: 1.15rem; color: var(--muted); }
.mono, .kicker, .tag, .since, .cap, .note, label, .top nav, footer, .rule { font-family: var(--mono); }
.wrap { width: min(1080px, 100% - 2 * var(--gutter)); margin-inline: auto; }

/* sections: numbered like a runbook, with a rule running off the kicker */
main > section { padding: clamp(3.5rem, 9vw, 7rem) 0; border-top: 1px solid var(--line); counter-increment: sec; }
main > section:first-of-type { border-top: 0; }
.kicker {
  display: flex; align-items: center; gap: 1rem; margin-bottom: 1.4rem;
  font-size: .74rem; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; color: var(--accent-deep);
}
.kicker::before { content: counter(sec, decimal-leading-zero); color: var(--ink); font-weight: 600; }
.kicker::after { content: ""; flex: 1; border-top: 1px solid var(--line); max-width: 220px; }

/* header */
.top {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--paper) 90%, transparent);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--ink);
}
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 58px; }
.brand { display: inline-flex; align-items: baseline; color: var(--ink); text-decoration: none; font-family: "Jost", var(--sans); font-weight: 300; font-size: 1.35rem; letter-spacing: .34em; line-height: 1; }
.brand .plus { color: var(--accent); font-weight: 400; position: relative; top: .02em; }
.brand:hover .plus { color: var(--accent-deep); }
.wordmark-lg { font-family: "Jost", var(--sans); font-weight: 300; letter-spacing: .34em; }
.wordmark-lg .plus { color: var(--accent); font-weight: 400; }
.top nav { display: flex; gap: 1.2rem; align-items: center; font-size: .78rem; letter-spacing: .04em; text-transform: uppercase; }
.top nav a { color: var(--ink); text-decoration: none; }
.top nav a:hover { color: var(--accent-deep); }
.top nav .lang { border: 1px solid var(--ink); border-radius: var(--r); padding: .2rem .55rem; font-weight: 600; }
.top nav .cta-mini { padding: .45rem .9rem !important; font-size: .78rem !important; }
@media (max-width: 640px) { .top nav a:not(.lang):not(.cta-mini) { display: none; } }

/* buttons: squared, hard shadow */
.btn {
  display: inline-flex; align-items: center; gap: .5rem; padding: .8rem 1.25rem;
  border-radius: var(--r); font: inherit; font-weight: 600; text-decoration: none; cursor: pointer;
  border: 1px solid var(--ink); color: var(--ink); background: var(--card);
  box-shadow: var(--hard); transition: transform .12s ease, box-shadow .12s ease;
}
.btn:hover { transform: translate(-1px, -1px); box-shadow: 5px 5px 0 var(--line); }
.btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--line); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); box-shadow: var(--hard-ink); }
.btn.primary:hover { box-shadow: 4px 4px 0 var(--ink); }
:root[data-theme="dark"] .btn.primary:hover { box-shadow: 4px 4px 0 var(--accent-deep); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn.primary:hover { box-shadow: 4px 4px 0 var(--accent-deep); } }
.actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 1.8rem; }

/* hero */
.hero { padding-top: clamp(3rem, 8vw, 6.5rem); }
.hero .grid { display: grid; gap: 2.5rem; align-items: center; grid-template-columns: 1fr; }
@media (min-width: 900px) { .hero .grid { grid-template-columns: 1fr 1fr; gap: 3.5rem; } }

/* ledger: the one visual the site owns */
.ledger {
  background: var(--ledger-bg); color: var(--ledger-ink); border: 1px solid var(--ink); border-radius: var(--r);
  padding: 0 1.1rem 1rem; box-shadow: var(--hard-ink); font-family: var(--mono); font-size: .76rem; line-height: 1.55;
  overflow-x: auto; position: relative;
}
.ledger .cap {
  display: flex; align-items: center; gap: .6rem; margin: 0 -1.1rem .8rem; padding: .55rem 1.1rem;
  border-bottom: 1px solid rgba(255,255,255,.08); color: var(--ledger-dim); font-size: .66rem; letter-spacing: .1em; text-transform: uppercase;
}
.ledger .cap::before { content: ""; width: 7px; height: 7px; background: var(--ledger-ok); box-shadow: 0 0 0 3px rgba(245,168,58,.18); }
.ledger table { border-collapse: collapse; white-space: nowrap; width: 100%; }
.ledger td { padding: .22rem .7rem .22rem 0; vertical-align: top; border-top: 1px dashed rgba(255,255,255,.06); }
.ledger tr:first-child td { border-top: 0; }
.ledger td:last-child { white-space: normal; min-width: 11ch; padding-right: 0; }
.ledger .dim { color: var(--ledger-dim); }
.ledger .ok { color: var(--ledger-ok); font-weight: 600; }
.ledger .warn { color: var(--ledger-warn); font-weight: 600; }
.ledger .rung { color: var(--ledger-dim); }
.ledger::after { content: "▌"; display: block; margin-top: .3rem; color: var(--ledger-ok); animation: blink 1.1s steps(1) infinite; }
.ledger tr { animation: rowin .5s ease both; }
.ledger tr:nth-child(1) { animation-delay: .15s; } .ledger tr:nth-child(2) { animation-delay: .45s; }
.ledger tr:nth-child(3) { animation-delay: .75s; } .ledger tr:nth-child(4) { animation-delay: 1.05s; }
.ledger tr:nth-child(5) { animation-delay: 1.35s; } .ledger tr:nth-child(6) { animation-delay: 1.65s; }
@keyframes rowin { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
@keyframes blink { 50% { opacity: 0; } }

/* ladder: three rungs climbing, with the staircase drawn behind */
.ladder { display: grid; gap: 1.2rem; margin-top: 2.5rem; grid-template-columns: 1fr; counter-reset: rung; position: relative; }
@media (min-width: 820px) {
  .ladder { grid-template-columns: repeat(3, 1fr); align-items: start; padding-top: 1rem; }
  .ladder .rung-card:nth-child(1) { margin-top: 6rem; }
  .ladder .rung-card:nth-child(2) { margin-top: 3rem; }
  /* staircase: each rung draws a dashed step up to the next rung's top edge */
  .ladder .rung-card:not(:last-child)::after {
    content: ""; position: absolute; top: -3rem; right: -1.2rem; width: 1.2rem; height: calc(3rem - 1px);
    border-bottom: 1px dashed var(--accent); border-right: 1px dashed var(--accent); pointer-events: none;
  }
  .ladder .rung-card:first-child::before, .ladder .rung-card::before { z-index: 1; }
}
.rung-card {
  position: relative; z-index: 1; background: var(--card); border: 1px solid var(--ink); border-radius: var(--r);
  padding: 1.5rem; box-shadow: var(--hard);
}
.rung-card::before {
  counter-increment: rung; content: "0" counter(rung);
  display: inline-block; padding: .15rem .45rem; border: 1px solid var(--ink); border-radius: var(--r);
  font-family: var(--mono); font-size: .72rem; font-weight: 600; letter-spacing: .06em; margin-bottom: 1rem;
  background: var(--accent); color: var(--accent-ink); border-color: var(--accent);
}
.rung-card p { font-size: .97rem; }
.rung-card .rule { margin-top: 1rem; padding-top: .9rem; border-top: 1px dashed var(--line); font-size: .78rem; color: var(--muted); }
.rung-card .rule::before { content: "// "; color: var(--accent-deep); }
.gets { display: grid; gap: 1.2rem; margin-top: 3.5rem; grid-template-columns: 1fr; }
@media (min-width: 820px) { .gets { grid-template-columns: repeat(3, 1fr); } }
.gets div { padding: 1rem 0 0; border-top: 2px solid var(--ink); }
.gets h3 { margin-bottom: .4rem; }
.gets p { font-size: .95rem; color: var(--muted); margin: 0; }

/* proof */
.proof { display: grid; gap: 1.2rem; margin-top: 2.5rem; grid-template-columns: 1fr; }
@media (min-width: 820px) { .proof { grid-template-columns: repeat(3, 1fr); } }
.proof article { background: var(--card); border: 1px solid var(--ink); border-radius: var(--r); padding: 1.5rem; box-shadow: var(--hard); display: flex; flex-direction: column; }
.proof .tag { font-size: .68rem; font-weight: 500; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: .7rem; }
.proof h3 { margin-bottom: .5rem; font-size: 1.3rem; }
.proof p { font-size: .96rem; margin-bottom: .7rem; }
.proof .since { margin-top: auto; padding-top: .9rem; border-top: 1px dashed var(--line); font-size: .74rem; color: var(--accent-deep); display: flex; align-items: center; gap: .5rem; }
.proof .since::before { content: ""; width: 7px; height: 7px; background: var(--accent); flex: none; }
.proof .since a { color: inherit; }
.aside { margin-top: 2.5rem; padding: 1.3rem 1.5rem; border: 1px solid var(--ink); border-left: 6px solid var(--accent); background: var(--paper-2); border-radius: var(--r); }
.aside p { margin: 0; max-width: none; }

/* fit */
.fit { display: grid; gap: 1.5rem 3rem; margin-top: 2rem; grid-template-columns: 1fr; }
@media (min-width: 720px) { .fit { grid-template-columns: 1fr 1fr; } }
.fit h3 { font-family: var(--mono); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; color: var(--accent-deep); padding-bottom: .5rem; border-bottom: 1px solid var(--line); }
.fit .no h3 { color: var(--warn); }
.fit ul { margin: .6rem 0 0; padding: 0; list-style: none; }
.fit li { margin-bottom: .6rem; padding-left: 1.3rem; position: relative; }
.fit li::before { content: "+"; position: absolute; left: 0; font-family: var(--mono); color: var(--accent-deep); font-weight: 600; }
.fit .no li::before { content: "–"; color: var(--warn); }

/* form */
.form-wrap { display: grid; gap: 2.5rem; grid-template-columns: 1fr; }
@media (min-width: 900px) { .form-wrap { grid-template-columns: .9fr 1.1fr; align-items: start; } }
form { background: var(--card); border: 1px solid var(--ink); border-radius: var(--r); padding: 1.6rem; box-shadow: var(--hard); }
.field { margin-bottom: 1.1rem; }
label { display: block; font-size: .72rem; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; margin-bottom: .4rem; color: var(--ink); }
label small { font-weight: 400; color: var(--muted); text-transform: none; letter-spacing: 0; }
input, select, textarea {
  width: 100%; font: inherit; color: var(--ink); background: var(--paper);
  border: 1px solid var(--line); border-radius: var(--r); padding: .75rem .9rem;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent); }
textarea { min-height: 130px; resize: vertical; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.note { font-size: .74rem; color: var(--muted); margin: .9rem 0 0; }
.status { margin-top: 1rem; padding: .8rem 1rem; border-radius: var(--r); font-size: .95rem; display: none; border: 1px solid transparent; }
.status.ok { display: block; background: var(--accent-soft); border-color: var(--accent); color: var(--ink); }
.status.err { display: block; background: #e3ebf1; border-color: var(--warn); color: #23384a; }
:root[data-theme="dark"] .status.err { background: #182a38; color: #c7dbe9; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .status.err { background: #182a38; color: #c7dbe9; } }

/* footer */
footer { border-top: 1px solid var(--ink); padding: 2rem 0 3rem; font-size: .74rem; letter-spacing: .04em; color: var(--muted); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 1rem 2rem; justify-content: space-between; }
footer a { color: inherit; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .ledger tr, .ledger::after { transition: none; animation: none; }
}