/* TAM-100 · web · light. Tokens from tiers/TAM-100.design.md (brand system v0.2.6). */

@font-face { font-family: "IBM Plex Mono"; font-weight: 400; font-display: swap; src: url(fonts/IBMPlexMono-Regular.woff2) format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 500; font-display: swap; src: url(fonts/IBMPlexMono-Medium.woff2) format("woff2"); }
/* Montserrat Bold 700 substitutes Neue Galano ExtraBold (typography.families.display.unlicensed_substitute) */
@font-face { font-family: "Montserrat"; font-weight: 700; font-display: swap; src: url(fonts/Montserrat-Bold.woff) format("woff"); }
@font-feature-values "Neue Galano" { @styleset { tam-canonical-a: 1; } }

[data-theme="light"] {
  --surface-primary: #ffffff;
  --surface-secondary: #f5f5f5;
  --text-primary: #000000;
  --text-secondary: #787878;
  --border-primary: #000000;
  --accent-link: #0000ff;
  --critical: #d83a34;            /* secondary.critical.light */
}
:root { --accent-focus: #ffd923; --mono: "IBM Plex Mono", monospace; }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--surface-primary);
  color: var(--text-primary);
  font: 400 14px/20px var(--mono);
  letter-spacing: -0.02em;
}
h1, h2, p { margin: 0; }
a { color: var(--accent-link); text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent-focus); outline-offset: 0; }

.tam-display {
  font-family: "Neue Galano", "Montserrat", sans-serif;
  font-weight: 700;
  /* ss01 rides only on the named styleset, scoped to Neue Galano: set globally it swaps
     Montserrat's E in the fallback. */
  font-variant-alternates: styleset(tam-canonical-a);
  letter-spacing: 0;
}

/* Layout: one reading column, mobile-first. */
.top, main, .foot { width: 100%; max-width: 760px; margin: 0 auto; padding-left: 16px; padding-right: 16px; }
.top { padding-top: 24px; }
.wordmark { display: inline-block; color: var(--text-primary); }
.wordmark svg { display: block; height: 36px; width: auto; }   /* 36px = lockup minimum */

.hero { padding: 64px 0; }
.hero h1 { font-size: 40px; line-height: 45px; }
.lede { font-size: 20px; line-height: 30px; letter-spacing: -0.03em; margin-top: 24px; }
.lede + .lede { margin-top: 16px; }

.join { padding-bottom: 96px; }
.eyebrow {
  font: 400 14px/20px var(--mono); text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--text-secondary);
}

/* Path chooser: pill_tag.toggle as a radio group. */
.paths { border: 0; margin: 24px 0 0; padding: 0; min-width: 0; }
.label { padding: 0; margin-bottom: 8px; font-size: 14px; }
.pills { display: flex; flex-wrap: wrap; gap: 8px; }
.pill {
  position: relative; display: inline-flex; align-items: center; height: 32px; padding: 0 12px;
  border: 1px solid var(--border-primary); border-radius: 999px; cursor: pointer;
  text-transform: uppercase; letter-spacing: 0.05em; white-space: nowrap;
}
.pill input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.pill:hover { background: var(--surface-secondary); }
.pill:has(input:checked) { background: var(--text-primary); color: var(--surface-primary); }
.pill:has(input:checked):hover { background: var(--text-secondary); border-color: var(--text-secondary); }
.pill:has(input:focus-visible) { border: 2px solid var(--accent-focus); padding: 0 11px; }
.pill:active { transform: scale(0.98); }

/* Form: text_field.boxed (the form is the section). */
.form { margin-top: 48px; display: grid; gap: 24px; }
.form[hidden] { display: none; }
.form-intro { font-size: 20px; line-height: 30px; letter-spacing: -0.03em; }
.field { display: grid; gap: 8px; }
.field > label { text-transform: uppercase; letter-spacing: 0.05em; }
.optional { text-transform: none; letter-spacing: 0; color: var(--text-secondary); }
input[type="text"], input[type="email"], select, textarea {
  width: 100%; margin: 0; border: 1px solid var(--border-primary); border-radius: 0;
  background: var(--surface-secondary); color: var(--text-primary);
  font: 400 14px/20px var(--mono); letter-spacing: 0; padding: 9px 16px; min-height: 40px;
}
textarea { resize: vertical; padding-top: 10px; }
select {
  appearance: none; -webkit-appearance: none; padding-right: 48px; cursor: pointer;
  /* IBM UI Icons chevron--down, 16px */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Cpath d='M16 22 6 12l1.4-1.4 8.6 8.6 8.6-8.6L26 12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 16px center; background-size: 16px;
}
input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: none; border: 2px solid var(--accent-focus); padding-left: 15px;
}
input:focus-visible, select:focus-visible { padding-top: 8px; padding-bottom: 8px; }
.field.invalid input, .field.invalid select, .field.invalid textarea { border-color: var(--critical); }
.error { color: var(--critical); margin-top: -4px; }

.check { grid-template-columns: 20px 1fr; align-items: start; column-gap: 12px; }
.check > label { text-transform: none; letter-spacing: -0.02em; }
.check input {
  appearance: none; -webkit-appearance: none; width: 20px; height: 20px; margin: 0;
  border: 1px solid var(--border-primary); border-radius: 0; background: var(--surface-secondary);
  display: grid; place-content: center; cursor: pointer;
}
.check input:checked { background: var(--text-primary); }
.check input:checked::after {
  content: ""; width: 10px; height: 6px; margin-top: -2px;
  border-left: 2px solid var(--surface-primary); border-bottom: 2px solid var(--surface-primary);
  transform: rotate(-45deg);
}
.check input:focus-visible { border: 2px solid var(--accent-focus); }
.check.invalid input { border-color: var(--critical); }
.check .error { grid-column: 2; }

.status:empty { display: none; }
.status.is-error { color: var(--critical); }
.btn {
  justify-self: start; height: 40px; padding: 0 32px; border: 0; border-radius: 4px;
  white-space: nowrap; cursor: pointer; font: 400 14px/40px var(--mono); letter-spacing: 0;
}
.btn-primary { background: var(--text-primary); color: var(--surface-primary); }
.btn-primary:hover { background: var(--text-secondary); }
.btn-primary:focus-visible { outline: 2px solid var(--accent-focus); outline-offset: 0; }
.btn:active { transform: scale(0.98); }
.btn[disabled] { background: var(--surface-secondary); color: var(--text-secondary); pointer-events: none; }

.done { margin-top: 48px; font-size: 20px; line-height: 30px; letter-spacing: -0.03em; }

.foot {
  display: flex; flex-wrap: wrap; gap: 8px 24px; padding-top: 24px; padding-bottom: 48px;
  border-top: 1px solid var(--border-primary);
}

@media (min-width: 1024px) {
  .top { padding-top: 48px; }
  .hero { padding: 96px 0 64px; }
  .hero h1 { font-size: 56px; line-height: 64px; }   /* oversize_display, >= 40 */
}

/* Honeypot: off-screen, not display:none, so bots still fill it. */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; }