/* ============================================================
   Helm design primitives — v0 draft
   Depends on tokens.css. Source-of-truth in helm-company/design/
   until TA's substrate lands; ports to Turbo-Puffin/helm:ui/design-system/.

   Brief: editorial / legal-brief register. Names are short for primitives
   (`btn`, `input`, `notice`), descriptive for composites (those land week 2).
   No utilities — name the pattern.
   ============================================================ */

/* ============================================================
   Typography
   Bringhurst trick: don't go heavier as you go larger.
   Heading weight tops at 600; size does the work.
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: var(--fw-semibold);
  line-height: var(--lh-head);
  letter-spacing: var(--tr-tight);
  text-wrap: balance;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); }
h5 { font-size: var(--fs-h5); font-weight: var(--fw-medium); }
h6 { font-size: var(--fs-h6); font-weight: var(--fw-medium); }

p {
  margin: 0;
  text-wrap: pretty;
}

.lead {
  font-size: var(--fs-lead);
  line-height: var(--lh-lead);
  color: var(--color-ink);
}

.caption {
  font-size: var(--fs-caption);
  color: var(--color-muted);
}

.small {
  font-size: var(--fs-small);
}

.muted   { color: var(--color-muted); }
.subtle  { color: var(--color-subtle); }
.warning { color: var(--color-warning); }

.mono {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1;
  letter-spacing: 0;
}

.tnum   { font-variant-numeric: tabular-nums; }
.oldnum { font-variant-numeric: oldstyle-nums proportional-nums; }

/* Small-caps for overlines, citations, timestamps. Pairs Inter's smcp + tracking. */
.smcp {
  font-feature-settings: "smcp" 1;
  letter-spacing: var(--tr-wide);
  text-transform: lowercase;
  color: var(--color-muted);
}

/* Editorial overline marker — replaces the "◆ Section" pattern from archived-helm.
   Tracking emphasizes the bracket-y feel without the literal diamond glyph. */
.overline {
  font-family: var(--font-sans);
  font-size: var(--fs-caption);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tr-caps);
  text-transform: uppercase;
  color: var(--color-muted);
}

/* ============================================================
   Links + citations
   Citations are first-class — when we cite a contract clause, that gets
   its own primitive. .cite renders inline; .cite-block renders as a
   blockquote-style legal reference.
   ============================================================ */

a {
  color: var(--color-ink);
  text-decoration: underline;
  text-underline-offset: 0.16em;
  text-decoration-thickness: 1px;
  transition: color var(--dur-fast) var(--ease);
}

a:hover {
  color: var(--color-citation);
}

a:focus-visible {
  outline: 2px solid var(--color-ink);
  outline-offset: 2px;
}

.cite {
  color: var(--color-citation);
  font-variant: small-caps;
  text-decoration: none;
  font-weight: var(--fw-medium);
}

.cite::before {
  content: "§ ";
  color: var(--color-muted);
}

.cite-block {
  border-left: var(--bw-rule) solid var(--color-ink);
  margin: var(--space-6) 0;
  padding: var(--space-2) var(--space-5);
  font-family: var(--font-sans);
  color: var(--color-ink);
}

.cite-block .cite-source {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--fs-caption);
  color: var(--color-muted);
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
}

/* External-link indicator — discreet, no icon */
a[href^="http"][target="_blank"]::after {
  content: " ↗";
  color: var(--color-subtle);
  font-size: 0.85em;
}

/* ============================================================
   Buttons
   Square corners, hairline border, weight from typography not gradients.
   No glow, no shadow, no animation beyond color transitions.
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  font-weight: var(--fw-medium);
  line-height: 1;
  letter-spacing: var(--tr-normal);
  color: var(--color-ink);
  background: var(--color-paper);
  border: var(--bw-hairline) solid var(--color-ink);
  border-radius: var(--radius-0);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition:
    background var(--dur-default) var(--ease),
    color var(--dur-default) var(--ease);
}

.btn:hover {
  background: var(--color-ink);
  color: var(--color-paper);
}

.btn:focus-visible {
  outline: 2px solid var(--color-ink);
  outline-offset: 2px;
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  color: var(--color-subtle);
  border-color: var(--color-subtle);
  cursor: not-allowed;
}

.btn:disabled:hover,
.btn[aria-disabled="true"]:hover {
  background: var(--color-paper);
  color: var(--color-subtle);
}

.btn-primary {
  background: var(--color-ink);
  color: var(--color-paper);
}

.btn-primary:hover {
  background: var(--color-paper);
  color: var(--color-ink);
}

.btn-ghost {
  border-color: transparent;
}

.btn-ghost:hover {
  background: transparent;
  color: var(--color-citation);
  border-color: transparent;
  text-decoration: underline;
}

.btn-warning {
  color: var(--color-warning);
  border-color: var(--color-warning);
}

.btn-warning:hover {
  background: var(--color-warning);
  color: var(--color-paper);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--fs-small);
}

.btn-lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--fs-lead);
}

/* ============================================================
   Inputs
   Hairline border, single 2px radius exception (iOS auto-rounding),
   no inner shadow, no decoration. Focus state is the only motion.
   ============================================================ */

.input,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
input[type="number"],
input[type="search"],
input[type="url"],
input[type="date"],
textarea,
select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-snug);
  color: var(--color-ink);
  background: var(--color-paper);
  border: var(--bw-hairline) solid var(--color-rule-strong);
  border-radius: var(--radius-input);
  transition: border-color var(--dur-default) var(--ease);
}

.input:focus,
input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-citation);
  box-shadow: 0 0 0 2px var(--color-citation);
  border-color: transparent;
}

.input::placeholder,
input::placeholder,
textarea::placeholder {
  color: var(--color-subtle);
}

.input:disabled,
input:disabled,
textarea:disabled,
select:disabled {
  background: #FAFAFA;
  color: var(--color-subtle);
  cursor: not-allowed;
}

.input[aria-invalid="true"],
input[aria-invalid="true"],
textarea[aria-invalid="true"] {
  border-color: var(--color-warning);
}

textarea {
  resize: vertical;
  min-height: calc(var(--lh-body) * 4em);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23000' stroke-width='1.5'><polyline points='4 6 8 10 12 6'/></svg>");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  padding-right: var(--space-10);
}

.input-label,
label {
  display: block;
  margin-bottom: var(--space-2);
  font-family: var(--font-sans);
  font-size: var(--fs-caption);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tr-caps);
  text-transform: uppercase;
  color: var(--color-muted);
}

.input-help {
  margin-top: var(--space-2);
  font-size: var(--fs-caption);
  color: var(--color-muted);
}

.input-error {
  margin-top: var(--space-2);
  font-size: var(--fs-caption);
  color: var(--color-warning);
}

/* Checkbox + radio — minimal, square corners, ink-on-paper */
input[type="checkbox"],
input[type="radio"] {
  width: var(--space-4);
  height: var(--space-4);
  margin: 0 var(--space-2) 0 0;
  padding: 0;
  border: var(--bw-hairline) solid var(--color-ink);
  background: var(--color-paper);
  appearance: none;
  cursor: pointer;
  vertical-align: -2px;
}

input[type="radio"] {
  border-radius: 50%;
}

input[type="checkbox"]:checked,
input[type="radio"]:checked {
  background: var(--color-ink);
  background-position: center;
  background-repeat: no-repeat;
  background-size: 10px 10px;
}

input[type="checkbox"]:checked {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23fff' stroke-width='2'><polyline points='3 8 7 12 13 5'/></svg>");
}

input[type="radio"]:checked {
  background-image: radial-gradient(circle at center, #fff 30%, transparent 32%);
}

input[type="checkbox"]:focus-visible,
input[type="radio"]:focus-visible {
  outline: 2px solid var(--color-ink);
  outline-offset: 2px;
}

/* ============================================================
   Dividers
   ============================================================ */

hr,
.rule {
  height: var(--bw-hairline);
  background: var(--color-rule);
  border: 0;
  margin: var(--space-6) 0;
}

.rule-strong {
  height: var(--bw-rule);
  background: var(--color-ink);
  border: 0;
  margin: var(--space-6) 0;
}

/* ============================================================
   Lists
   Legal-style: column rules instead of zebra. Definition lists are
   first-class because case-file metadata is dense definitions.
   ============================================================ */

ul, ol {
  margin: 0;
  padding-left: var(--space-6);
  line-height: var(--lh-body);
}

ul li + li,
ol li + li {
  margin-top: var(--space-1);
}

ul.unbulleted {
  padding-left: 0;
  list-style: none;
}

dl {
  margin: 0;
  display: grid;
  grid-template-columns: max-content 1fr;
  column-gap: var(--space-6);
  row-gap: var(--space-2);
}

dt {
  font-family: var(--font-sans);
  font-size: var(--fs-caption);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tr-caps);
  text-transform: uppercase;
  color: var(--color-muted);
  padding-top: 2px; /* baseline-align with dd at body size */
}

dd {
  margin: 0;
}

/* ============================================================
   Tables (legal-style)
   Column rules, no zebra stripes. Tabular numbers in numeric cells.
   ============================================================ */

table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
}

thead th {
  text-align: left;
  font-family: var(--font-sans);
  font-size: var(--fs-caption);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tr-caps);
  text-transform: uppercase;
  color: var(--color-muted);
  padding: var(--space-3) var(--space-3) var(--space-2);
  border-bottom: var(--bw-rule) solid var(--color-ink);
}

tbody td {
  padding: var(--space-3);
  border-bottom: var(--bw-hairline) solid var(--color-rule);
  vertical-align: top;
}

tbody tr:last-child td {
  border-bottom: var(--bw-rule) solid var(--color-ink);
}

td.numeric,
th.numeric {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
}

/* ============================================================
   Code
   ============================================================ */

code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: #F4F4F4;
  padding: 1px 4px;
}

pre {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  line-height: var(--lh-snug);
  background: #F4F4F4;
  padding: var(--space-4) var(--space-5);
  overflow-x: auto;
  margin: 0;
}

pre code {
  background: transparent;
  padding: 0;
}

/* ============================================================
   Notice / callout
   Single-color band, hairline rule on the left. No card, no shadow.
   Variants for the two semantic accents only.
   ============================================================ */

.notice {
  padding: var(--space-4) var(--space-5);
  border-left: var(--bw-rule) solid var(--color-ink);
  background: var(--color-paper);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
}

.notice-warning {
  border-left-color: var(--color-warning);
  color: var(--color-warning);
}

.notice-cite {
  border-left-color: var(--color-citation);
  color: var(--color-citation);
}

.notice-title {
  display: block;
  margin-bottom: var(--space-1);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-body);
  letter-spacing: var(--tr-normal);
  text-transform: none;
  color: inherit;
}

/* ============================================================
   Blockquote (for quoted contract language, depositions, etc.)
   ============================================================ */

blockquote {
  margin: var(--space-6) 0;
  padding: 0 var(--space-6);
  border-left: var(--bw-rule) solid var(--color-rule-strong);
  font-style: normal; /* legal-brief register: no italics on quoted clauses */
  color: var(--color-ink);
}

blockquote cite {
  display: block;
  margin-top: var(--space-2);
  font-style: normal;
  font-size: var(--fs-caption);
  color: var(--color-muted);
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
}

blockquote cite::before {
  content: "— ";
}

/* ============================================================
   Page-level utilities (named, not utility-prefixed)
   The page container + the body measure. That's it.
   ============================================================ */

.page {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 var(--page-pad);
}

.measure {
  max-width: var(--measure-body);
  margin: 0 auto;
}

.measure-narrow { max-width: var(--measure-narrow); margin: 0 auto; }
.measure-wide   { max-width: var(--measure-wide); margin: 0 auto; }

/* Visually-hidden but screen-reader-accessible */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Skip-to-main link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  padding: var(--space-3) var(--space-5);
  background: var(--color-ink);
  color: var(--color-paper);
  text-decoration: none;
  z-index: var(--z-overlay);
}

.skip-link:focus {
  top: 0;
}