/* ── BRANDT INTERACTIVE — COMPONENTS ───────────────────────────────────────
   Loads after tokens.css and base.css. One component style lives here;
   no page duplicates these rules (design-system.md §11).

   D-051 applied throughout: controls use --radius-control, information
   surfaces use --radius-surface (0). Elevation only on floating elements.
   ──────────────────────────────────────────────────────────────────────── */

/* ── Section modifiers (D-051) ───────────────────────────────────────────
   Tinted bands are FULL-BLEED. The section carries the background; a
   .container-wide div inside carries the measure. Never put .container-* and
   a background on the same element — it inset the tint to 1280px. */
.section--bone {
  background: var(--color-bone);
  border-block: var(--rule-hair);
}
.section--hero {
  padding-block: var(--space-8) var(--space-7);
}
@media (min-width: 1024px) {
  .section--hero { padding-block: var(--space-9) var(--space-8); }
}

/* ── Buttons (design-system.md §6) ────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-control);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-body);
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}
.btn--primary {
  background: var(--color-navy);
  color: var(--color-white);
}
.btn--primary:hover { background: var(--color-blue); color: var(--color-white); }
.btn--secondary {
  background: transparent;
  color: var(--color-navy);
  border-color: var(--color-line);
}
.btn--secondary:hover { border-color: var(--color-navy); }
.btn--text {
  padding: 0;
  min-height: 0;
  background: none;
  color: var(--color-blue);
  text-underline-offset: 0.15em;
  text-decoration: underline;
}
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin: 0;
}

/* ── Site header (T-012, D-013) ──────────────────────────────────────── */
.site-header {
  background: var(--color-white);
  border-bottom: var(--rule-hair);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  height: 72px;
}
.site-header__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.site-header__logo-fallback {
  display: none;
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-navy);
}
.site-header__nav {
  display: none;
  align-items: center;
  gap: var(--space-6);
}
.site-header__link {
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2) 0;
}
.site-header__link:hover,
.site-header__link[aria-current="page"] {
  color: var(--color-blue);
}
.site-header__submenu-wrap { position: relative; }
.site-header__submenu-toggle { display: inline-flex; align-items: center; gap: var(--space-1); }

/* The submenu genuinely floats — the only sanctioned use of elevation. */
.site-header__submenu {
  position: absolute;
  top: calc(100% + var(--space-3));
  left: 0;
  min-width: 260px;
  background: var(--color-white);
  border: var(--rule-hair);
  border-top: var(--rule-strong);
  border-radius: var(--radius-control);
  box-shadow: var(--shadow-overlay);
  list-style: none;
  margin: 0;
  padding: var(--space-2);
}
.site-header__submenu li a {
  display: block;
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-control);
  color: var(--color-ink);
  text-decoration: none;
  font-size: var(--text-small);
}
.site-header__submenu li a:hover,
.site-header__submenu li a[aria-current="page"] {
  background: var(--color-bone);
  color: var(--color-navy);
}
.site-header__actions { display: flex; align-items: center; gap: var(--space-4); }
.site-header__cta { display: none; }
.site-header__mobile-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-control);
  border: var(--rule-hair);
  background: var(--color-white);
  color: var(--color-navy);
  cursor: pointer;
}
.site-header__mobile-menu {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-5);
  border-top: var(--rule-hair);
  background: var(--color-white);
}
.site-header__mobile-menu a {
  font-family: var(--font-body);
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
  padding: var(--space-2) 0;
}
.site-header__mobile-menu a[aria-current="page"] { color: var(--color-blue); }
.site-header__mobile-group-label {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-slate);
  margin: var(--space-2) 0 0;
}
.site-header__mobile-sublink { padding-left: var(--space-4) !important; font-weight: 500 !important; }
.site-header__mobile-cta { margin-top: var(--space-3); }
.site-header__mobile-menu[hidden] { display: none; }

@media (min-width: 1024px) {
  .site-header__nav { display: flex; }
  .site-header__cta { display: inline-flex; }
  .site-header__mobile-toggle { display: none; }
  .site-header__mobile-menu { display: none !important; }
}

/* ── Site footer (T-013) ─────────────────────────────────────────────── */
.site-footer {
  background: var(--color-ink);
  color: var(--color-bone);
}
.site-footer__inner { padding-block: var(--space-8); }
.site-footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-7);
  margin-bottom: var(--space-7);
}
.site-footer__brand { max-width: 260px; }
.site-footer__logo { display: inline-flex; margin-bottom: var(--space-4); }
.site-footer__logo-fallback {
  display: none;
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-white);
}
.site-footer__descriptor {
  font-size: var(--text-small);
  color: var(--color-slate);
  line-height: 1.6;
}
.site-footer__group { display: flex; flex-direction: column; gap: var(--space-2); }
.site-footer__group a {
  color: var(--color-bone);
  text-decoration: none;
  font-size: var(--text-small);
  padding: var(--space-1) 0;
}
.site-footer__group a:hover { color: var(--color-brass-bright); text-decoration: underline; }
.site-footer__heading {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-white);
  margin: 0 0 var(--space-3);
}
.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: var(--space-5);
  border-top: 1px solid rgba(244, 240, 231, 0.12);
  font-size: var(--text-small);
  color: var(--color-slate);
}
.site-footer__mono { font-family: var(--font-mono); font-size: var(--text-label); }

@media (min-width: 640px) {
  .site-footer__top { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 1024px) {
  .site-footer__top { grid-template-columns: 1.4fr 1fr 1fr 1fr 0.8fr; }
}

/* ── Card grid — replaces the repeated inline auto-fit grids ──────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-5);
  margin-top: var(--space-6);
}
.card-grid--tight { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

/* ── Service card (T-014) ────────────────────────────────────────────── */
.service-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  background: var(--color-white);
  border: var(--rule-hair);
  border-radius: var(--radius-surface);
}
.service-card__outcome {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink);
  margin: 0;
}
.service-card__title { margin: 0; font-size: var(--text-h3); }
.service-card__problem { color: var(--color-slate); margin: 0; }
.service-card__list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--space-2); }
.service-card__list li {
  font-size: var(--text-small);
  padding-left: var(--space-5);
  position: relative;
}
.service-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--color-navy);
}
.service-card__link { margin-top: auto; padding-top: var(--space-2); align-self: flex-start; }

/* ── Diagnostic panel (T-014) — THE SIGNATURE COMPONENT ───────────────────
   Squared, bone-filled, hairline-bordered, with a 2px brass rule across the
   top edge. Reads as a ruled report sheet. Brass appears here and nowhere
   else on the page — this is the one bold move. Reserve this component for
   an actual audit readout; do not use it as a generic box. */
.diagnostic-panel {
  background: var(--color-bone);
  border: var(--rule-hair);
  border-top: var(--rule-accent);
  border-radius: var(--radius-surface);
  padding: var(--space-6);
}
.section--bone .diagnostic-panel { background: var(--color-white); }
.diagnostic-panel__label {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink);
  margin: 0 0 var(--space-4);
}
.diagnostic-panel__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-4);
  border-bottom: var(--rule-hair);
  font-size: var(--text-small);
}
.diagnostic-panel__row:last-child { border-bottom: none; padding-bottom: 0; }
.diagnostic-panel__row strong {
  display: block;
  font-size: var(--text-body);
  color: var(--color-ink);
  margin-bottom: var(--space-1);
}
.diagnostic-panel__detail { color: var(--color-body); }
.diagnostic-panel__status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-label);
  flex-shrink: 0;
}
.diagnostic-panel__dot { width: 8px; height: 8px; flex-shrink: 0; }
.diagnostic-panel__dot--good { background: var(--color-signal); }
.diagnostic-panel__dot--warn { background: var(--color-brass); }
.diagnostic-panel__dot--gap  { background: var(--color-error); }

/* ── Panel — generic bordered info box (D-051) ─────────────────────────────
   For content that needs visual separation but isn't an audit readout: a
   stat callout, a single flagged notice, a short write-up. No brass — brass
   stays exclusive to .diagnostic-panel and .cta-band. Do not use this for
   anything that would fit .diagnostic-panel's row/dot structure instead. */
.panel {
  background: var(--color-bone);
  border: var(--rule-hair);
  border-radius: var(--radius-surface);
  padding: var(--space-6);
}
.section--bone .panel { background: var(--color-white); }

/* ── Panel — ink modifier (D-051 amendment) ─────────────────────────────
   Same surface on a dark (--color-ink) section: 6% white fill, 14% white
   border, bone body text (13.3:1 on the blended fill — well past AA).
   Headings and mono labels have their own explicit color rules elsewhere
   (base.css h1–h4, .mono-label) that win over inherited color, so they need
   their own override here rather than relying on inheritance alone. */
.panel--ink {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.14);
  color: var(--color-bone);
}
.panel--ink h3 { color: var(--color-white); }
.panel--ink .mono-label { color: var(--color-bone); }

/* ── Sector list — hairline rows, no false numbering ──────────────────── */
.sector-list {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0 var(--space-7);
}
.sector-list li {
  padding-block: var(--space-4);
  border-top: var(--rule-hair);
  font-weight: 600;
  color: var(--color-ink);
}
@media (min-width: 768px) {
  .sector-list { grid-template-columns: 1fr 1fr; }
}

/* ── Process step (T-014) — 01–04 is a real sequence, so it is numbered ── */
.process-step {
  padding-top: var(--space-4);
  border-top: var(--rule-strong);
}
.process-step__num {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-navy);
  margin: 0 0 var(--space-2);
}
.process-step p:last-child { margin: 0; color: var(--color-body); }

/* ── Case-study card (T-014) ─────────────────────────────────────────── */
.case-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  border: var(--rule-hair);
  border-radius: var(--radius-surface);
  overflow: hidden;
  background: var(--color-white);
}
.case-card__media {
  aspect-ratio: 16 / 10;
  background: var(--color-bone-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-slate);
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.case-card__body { padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-2); flex: 1; }
.case-card__client { font-family: var(--font-mono); font-size: var(--text-label); text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-slate); margin: 0; }
.case-card__title { margin: 0; font-size: var(--text-h3); }
.case-card__problem { color: var(--color-body); margin: 0; font-size: var(--text-small); }
.case-card__body .btn--text { margin-top: auto; padding-top: var(--space-3); align-self: flex-start; }

/* ── Proof strip (T-014) ─────────────────────────────────────────────── */
.proof-strip {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  padding-block: var(--space-4);
  border-top: var(--rule-hair);
  border-bottom: var(--rule-hair);
  margin: 0;
  list-style: none;
  padding-inline: 0;
}
.proof-strip__item {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: 0.05em;
  color: var(--color-slate);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.proof-strip__item::before { content: "—"; color: var(--color-line); }
.proof-strip__item:first-child::before { content: none; }

/* ── CTA band (T-014) ────────────────────────────────────────────────── */
.cta-band {
  background: var(--color-navy);
  color: var(--color-white);
  border-radius: var(--radius-surface);
  border-top: var(--rule-accent);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}
.cta-band__heading { color: var(--color-white); margin: 0; }
.cta-band .btn--primary { background: var(--color-white); color: var(--color-navy); }
.cta-band .btn--primary:hover { background: var(--color-bone); }

/* ── FAQ disclosure (T-014) — native <details>, no JS required ─────────── */
.faq-item {
  border-bottom: var(--rule-hair);
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding-block: var(--space-4);
  font-weight: 600;
  color: var(--color-ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--color-navy);
  flex-shrink: 0;
}
.faq-item[open] summary::after { content: "−"; }
.faq-item p { padding-bottom: var(--space-4); color: var(--color-body); }

/* ── Form fields and status messages (T-014) ────────────────────────── */
.form-field { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-5); }
.form-field label { font-size: var(--text-small); font-weight: 600; color: var(--color-ink); }
.form-field .required { color: var(--color-error); }
.form-field input,
.form-field textarea,
.form-field select {
  min-height: 44px;
  padding: var(--space-3);
  border: var(--rule-hair);
  border-radius: var(--radius-control);
  font-family: var(--font-body);
  font-size: var(--text-body);
  color: var(--color-ink);
  background: var(--color-white);
}
.form-field textarea { min-height: 120px; resize: vertical; }
.form-field input:focus-visible,
.form-field textarea:focus-visible,
.form-field select:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-color: var(--color-blue);
}
.form-field__error {
  font-size: var(--text-small);
  color: var(--color-error);
}
.form-status {
  padding: var(--space-4);
  border-radius: var(--radius-surface);
  font-size: var(--text-small);
  border: 1px solid transparent;
  border-left-width: 3px;
}
.form-status--success { background: rgba(91, 127, 94, 0.1); border-color: var(--color-signal); color: #2f4a31; }
.form-status--error   { background: rgba(159, 47, 47, 0.08); border-color: var(--color-error); color: var(--color-error); }