/* huynguyenai.site — a printed analytics ledger: warm paper, ink, one signal colour. */

:root {
  --paper: #f3efe6;
  --paper-2: #ebe5d8;
  --ink: #17140f;
  --ink-2: #4a443a;
  --ink-3: #7c7466;
  --rule: #cfc6b4;
  --signal: #d9461a;
  --signal-ink: #fff8f2;
  --ok: #2f6b3a;
  --display: "Newsreader", "Iowan Old Style", Georgia, serif;
  --body: "Public Sans", "Helvetica Neue", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --measure: 68ch;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #15130f;
    --paper-2: #1d1a15;
    --ink: #f1ebdf;
    --ink-2: #c9c0b0;
    --ink-3: #8f8676;
    --rule: #3a342b;
    --signal: #f0663a;
    --signal-ink: #1a0d07;
    --ok: #7fbf8a;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 var(--body);
  font-feature-settings: "ss01";
  /* faint ledger lines */
  background-image: repeating-linear-gradient(to bottom, transparent 0 31px, color-mix(in srgb, var(--rule) 35%, transparent) 31px 32px);
}
a { color: inherit; text-decoration-color: var(--signal); text-underline-offset: 3px; text-decoration-thickness: 1.5px; }
a:hover { color: var(--signal); }
::selection { background: var(--signal); color: var(--signal-ink); }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 600px) { .wrap { padding: 0 16px; } }

/* masthead */
.mast { border-bottom: 2px solid var(--ink); background: var(--paper); }
.mast .wrap { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; padding-top: 18px; padding-bottom: 14px; flex-wrap: wrap; }
.mark { font: 600 22px/1 var(--display); letter-spacing: -0.01em; text-decoration: none; }
.mark b { color: var(--signal); font-weight: 600; }
.mast nav { display: flex; gap: 20px; font: 500 13px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.06em; flex-wrap: wrap; }
.mast nav a { text-decoration: none; color: var(--ink-2); }
.mast nav a:hover, .mast nav a[aria-current] { color: var(--signal); }

/* hero */
.hero { padding: 72px 0 56px; display: grid; grid-template-columns: 1.25fr 1fr; gap: 56px; align-items: end; }
@media (max-width: 860px) { .hero { grid-template-columns: 1fr; padding: 48px 0 40px; gap: 36px; } }
.kicker { font: 500 12px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 22px; }
.kicker::before { content: ""; display: inline-block; width: 8px; height: 8px; background: var(--signal); margin-right: 10px; vertical-align: 1px; }
h1 {
  font: 400 clamp(44px, 7vw, 88px)/0.98 var(--display);
  letter-spacing: -0.025em;
  margin: 0;
}
h1 em { font-style: italic; color: var(--signal); }
.lede { font-size: 19px; color: var(--ink-2); max-width: 46ch; margin: 28px 0 0; }

/* the ledger card */
.ledger { background: var(--paper-2); border: 1.5px solid var(--ink); box-shadow: 8px 8px 0 var(--ink); font-family: var(--mono); font-size: 13px; }
.ledger header { display: flex; justify-content: space-between; padding: 12px 16px; border-bottom: 1.5px solid var(--ink); text-transform: uppercase; letter-spacing: 0.08em; font-size: 11px; color: var(--ink-2); }
.ledger table { width: 100%; border-collapse: collapse; }
.ledger td { padding: 10px 16px; border-bottom: 1px dashed var(--rule); }
.ledger tr:last-child td { border-bottom: 0; }
.ledger td:last-child { text-align: right; font-variant-numeric: tabular-nums; }
.ledger .up { color: var(--ok); font-size: 11px; margin-left: 6px; }
.ledger tr { opacity: 0; animation: tick 0.5s ease-out forwards; }
.ledger tr:nth-child(1) { animation-delay: 0.15s; }
.ledger tr:nth-child(2) { animation-delay: 0.3s; }
.ledger tr:nth-child(3) { animation-delay: 0.45s; }
.ledger tr:nth-child(4) { animation-delay: 0.6s; }
.ledger tr:nth-child(5) { animation-delay: 0.75s; }
@keyframes tick { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .ledger tr { animation: none; opacity: 1; } }

/* sections */
section.band { border-top: 2px solid var(--ink); padding: 56px 0; }
.band-head { display: grid; grid-template-columns: 220px 1fr; gap: 32px; }
@media (max-width: 760px) { .band-head { grid-template-columns: 1fr; gap: 12px; } }
.band-head .num { font: 500 12px/1.4 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); padding-top: 10px; }
h2 { font: 400 clamp(30px, 4vw, 44px)/1.05 var(--display); letter-spacing: -0.015em; margin: 0 0 18px; }
.cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-top: 28px; border-top: 1px solid var(--rule); }
@media (max-width: 760px) { .cols { grid-template-columns: 1fr; } }
.cols > div { padding: 22px 24px 8px 0; border-bottom: 1px solid var(--rule); }
@media (min-width: 761px) { .cols > div + div { padding-left: 24px; border-left: 1px solid var(--rule); } }
.cols h3 { font: 600 15px/1.3 var(--body); margin: 0 0 6px; }
.cols h3 span { font-family: var(--mono); color: var(--signal); margin-right: 8px; font-weight: 500; }
.cols p { margin: 0 0 14px; color: var(--ink-2); font-size: 15px; }
.promise { list-style: none; padding: 0; margin: 24px 0 0; display: flex; flex-wrap: wrap; gap: 10px; }
.promise li { font: 500 13px/1 var(--mono); border: 1.5px solid var(--ink); padding: 9px 12px; background: var(--paper); }
.promise li::before { content: "✕ "; color: var(--signal); }
.promise li.yes::before { content: "✓ "; color: var(--ok); }

/* long-form legal text */
.doc { padding: 56px 0 72px; display: grid; grid-template-columns: 220px minmax(0, var(--measure)); gap: 32px; }
@media (max-width: 760px) { .doc { grid-template-columns: 1fr; padding: 36px 0 56px; gap: 8px; } }
.doc aside { font: 500 12px/1.6 var(--mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.08em; padding-top: 14px; }
.doc h1 { font-size: clamp(38px, 5vw, 56px); margin-bottom: 8px; }
.doc .meta { font: 13px var(--mono); color: var(--ink-3); margin: 0 0 32px; }
.doc h2 { font-size: 26px; margin: 40px 0 10px; }
.doc p, .doc li { color: var(--ink-2); }
.doc ul, .doc ol { padding-left: 20px; }
.doc li { margin: 4px 0; }
.doc strong { color: var(--ink); }
.doc code { font: 14px var(--mono); background: var(--paper-2); padding: 1px 5px; border: 1px solid var(--rule); }
.note { border-left: 3px solid var(--signal); background: var(--paper-2); padding: 14px 18px; margin: 24px 0; }
.note p { margin: 0; }

/* callback */
.cb { padding: 64px 0 80px; max-width: 720px; }
.cb .status { font: 500 12px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.12em; display: inline-flex; align-items: center; gap: 10px; margin-bottom: 20px; }
.cb .status i { width: 10px; height: 10px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 4px color-mix(in srgb, var(--ok) 25%, transparent); }
.cb.err .status i { background: var(--signal); box-shadow: 0 0 0 4px color-mix(in srgb, var(--signal) 25%, transparent); }
.cb h1 { font-size: clamp(40px, 6vw, 64px); }
.cb ol { padding-left: 20px; color: var(--ink-2); }
.addr { display: flex; border: 1.5px solid var(--ink); background: var(--paper-2); margin: 24px 0 12px; box-shadow: 6px 6px 0 var(--ink); }
.addr output { flex: 1; min-width: 0; padding: 14px 16px; font: 13px/1.5 var(--mono); word-break: break-all; }
.addr button { border: 0; border-left: 1.5px solid var(--ink); background: var(--signal); color: var(--signal-ink); font: 600 14px var(--body); padding: 0 22px; cursor: pointer; }
.addr button:hover { filter: brightness(1.08); }
.small { font-size: 14px; color: var(--ink-3); }

/* footer */
footer { border-top: 2px solid var(--ink); padding: 28px 0 40px; font: 13px/1.7 var(--mono); color: var(--ink-3); }
footer .wrap { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
footer nav { display: flex; gap: 18px; flex-wrap: wrap; }