/* ============================================================
   VASEO layout + components
   ------------------------------------------------------------
   Token-driven. NEVER hardcode colour / font / spacing values
   here. Every visual property references a var(--*) token from
   css/tokens.css.

   Cascade order: tokens.css -> style.css -> fixes.css.

   Built in:
     PRD 04 (Design System)       - component catalogue
     PRD 07 (Brand Token Activation) - token activation
     PRD 09 (Pattern Library)     - sg__* chrome, shared
                                    .c-* components, form primitives
   ============================================================ */

/* ============================================================
   1. Reset
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-md);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: var(--line-height-snug);
  color: var(--color-text);
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
a:hover {
  color: var(--color-text);
}

img {
  max-width: 100%;
  height: auto;
}

code, pre {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}

/* ============================================================
   2. Skip link (accessibility, on every page)
   ============================================================ */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: var(--space-2) var(--space-3);
  background: var(--color-text);
  color: var(--color-bg);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
  z-index: var(--z-chrome);
}
.skip-link:focus {
  left: var(--space-4);
  top: var(--space-4);
}

/* ============================================================
   3. Layout container
   ============================================================ */
.container {
  max-width: var(--content-max-width);
  margin-inline: auto;
  padding-inline: var(--content-pad-x);
}
@media (max-width: 768px) {
  .container {
    padding-inline: var(--content-pad-x-sm);
  }
}

.section {
  padding-block: var(--space-9);
}
@media (max-width: 768px) {
  .section {
    padding-block: var(--space-8);
  }
}

/* ============================================================
   4. Shared .c-* components (PRD 04 catalogue)
   ============================================================ */

/* ---- Buttons ---- */
.c-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-text);
  color: var(--color-bg);
  border: 1px solid var(--color-text);
  padding: 11px 18px;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
  min-height: 44px;
}
.c-btn:hover {
  transform: translateY(-1px);
  color: var(--color-bg);
}
.c-btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-strong);
}
.c-btn--ghost:hover {
  background: var(--color-surface);
  border-color: var(--color-text);
  color: var(--color-text);
}
.c-btn--signal {
  background: var(--color-signal);
  color: var(--color-signal-ink);
  border-color: var(--color-signal);
  font-weight: 600;
}
.c-btn--signal:hover {
  color: var(--color-signal-ink);
}
.c-btn--light {
  background: var(--color-inverse-text);
  color: var(--color-inverse-bg);
  border-color: var(--color-inverse-text);
  font-weight: 600;
}
.c-btn--light:hover {
  color: var(--color-inverse-bg);
}
.c-btn__arrow {
  width: 14px;
  height: 14px;
  stroke-width: 1.5;
}

/* ---- Mono label (used as section labels and small captions) ---- */
.c-label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-6);
}
.c-label::before {
  content: "";
  display: inline-block;
  width: var(--space-5);
  height: 1px;
  background: var(--color-text-muted);
}

/* ---- Pill tag ---- */
.c-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  padding: 5px 11px;
  border-radius: var(--radius-pill);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  width: max-content;
}
.c-tag__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.c-tag--signal {
  background: var(--color-signal-soft);
  color: var(--color-signal-ink);
}

/* ---- Eyebrow pill (status indicator) ---- */
.c-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  color: var(--color-text-soft);
  padding: 7px 14px 7px 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
}
.c-eyebrow__pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-signal);
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--color-signal) 60%, transparent);
  animation: c-eyebrow-pulse 2.4s var(--ease-out) infinite;
}
@keyframes c-eyebrow-pulse {
  0%   { box-shadow: 0 0 0 0 color-mix(in srgb, var(--color-signal) 60%, transparent); }
  70%  { box-shadow: 0 0 0 10px color-mix(in srgb, var(--color-signal) 0%, transparent); }
  100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--color-signal) 0%, transparent); }
}
@media (prefers-reduced-motion: reduce) {
  .c-eyebrow__pulse { animation: none; }
}

/* ---- Display heading helper ---- */
.h-display {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text);
  text-wrap: balance;
}
.h-display em {
  font-style: italic;
  color: var(--color-primary);
  font-weight: 400;
}

/* ---- Head grid (label + intro pattern) ---- */
.c-head-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-8);
  align-items: end;
  margin-bottom: var(--space-8);
}
.c-head-grid p {
  font-size: var(--font-size-md);
  line-height: var(--line-height-base);
  max-width: 48ch;
  color: var(--color-text-soft);
}
@media (max-width: 820px) {
  .c-head-grid { grid-template-columns: 1fr; gap: var(--space-5); }
}

/* ============================================================
   5. Form primitives (PRD 04 catalogue; live use in PRD 14)
   ============================================================ */

/* ---- Multi-select chip ---- */
.chip {
  position: relative;
  display: inline-flex;
  align-items: center;
  user-select: none;
}
.chip input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.chip__label {
  display: inline-block;
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
  padding: 8px 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out);
  min-height: 36px;
  line-height: 20px;
}
.chip:hover .chip__label {
  color: var(--color-text);
  border-color: var(--color-border-strong);
}
.chip input:checked + .chip__label {
  background: var(--color-text);
  color: var(--color-bg);
  border-color: var(--color-text);
}
.chip input:focus-visible + .chip__label {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ---- Segmented control (single-select) ---- */
.brief__seg {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-1);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-1);
}
@media (max-width: 540px) {
  .brief__seg { grid-template-columns: 1fr 1fr; }
}
.brief__seg label { position: relative; }
.brief__seg input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.brief__seg-label {
  display: block;
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
  padding: 8px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  min-height: 36px;
  line-height: 20px;
}
.brief__seg label:hover .brief__seg-label { color: var(--color-text); }
.brief__seg input:checked + .brief__seg-label {
  background: var(--color-text);
  color: var(--color-bg);
}
.brief__seg input:focus-visible + .brief__seg-label {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ============================================================
   6. Site chrome stubs replaced by PRD 10 — see end of file.
   ============================================================ */

/* ============================================================
   7. Page intro (used on non-home pages; full version PRD 10)
   ============================================================ */
.page-intro {
  padding-block: var(--space-9) var(--space-7);
}
.page-intro__eyebrow {
  margin: 0 0 var(--space-5);
}
.page-intro__heading {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: var(--font-size-4xl);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  margin: 0 0 var(--space-5);
  max-width: 22ch;
}
.page-intro__heading em {
  font-style: italic;
  color: var(--color-primary);
}
.page-intro__lede {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-base);
  color: var(--color-text-soft);
  max-width: 58ch;
}

/* ============================================================
   8. Styleguide chrome (.sg__*)
   ------------------------------------------------------------
   Renders the design system on styleguide.html. Scoped under
   the .sg-* prefix so it cannot bleed into live components.
   Activated only on body[data-page-type="styleguide"].
   ============================================================ */
.sg__intro {
  font-size: var(--font-size-md);
  color: var(--color-text-soft);
  max-width: 60ch;
}
.sg__intro + .sg__intro { margin-top: var(--space-3); }

.sg__group {
  padding-block: var(--space-7);
  border-top: 1px solid var(--color-border);
}
.sg__group:first-child { border-top: 0; padding-top: 0; }

.sg__group-title {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: var(--font-size-2xl);
  letter-spacing: var(--letter-spacing-snug);
  margin: 0 0 var(--space-2);
}

.sg__group-sub {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
  margin: 0 0 var(--space-5);
}

.sg__subhead {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: var(--space-6) 0 var(--space-3);
}

.sg__swatches {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-4);
}
.sg__swatch {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.sg__swatch-chip {
  height: 80px;
  border-bottom: 1px solid var(--color-border);
}
.sg__swatch-meta {
  padding: var(--space-3);
}
.sg__swatch-name {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-wide);
  display: block;
}
.sg__swatch-value {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--color-text-muted);
  letter-spacing: 0;
  display: block;
  margin-top: var(--space-1);
}

.sg__type-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-5);
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  align-items: baseline;
}
.sg__type-row:last-child { border-bottom: 0; }
@media (max-width: 640px) {
  .sg__type-row { grid-template-columns: 1fr; gap: var(--space-2); }
}
.sg__type-meta {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
}
.sg__type-meta strong { color: var(--color-text); font-weight: 500; }
.sg__type-sample {
  line-height: var(--line-height-snug);
  color: var(--color-text);
}

.sg__scale {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-3);
}
.sg__scale-row {
  display: grid;
  grid-template-rows: 1fr auto;
  gap: var(--space-2);
  align-items: end;
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  min-height: 120px;
  background: var(--color-surface);
}
.sg__scale-bar {
  background: var(--color-text);
  width: 100%;
}
.sg__scale-meta {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
}
.sg__scale-meta strong {
  color: var(--color-text);
  font-weight: 500;
  display: block;
}

.sg__components {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}
.sg__component {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-5);
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  align-items: center;
}
@media (max-width: 720px) {
  .sg__component { grid-template-columns: 1fr; gap: var(--space-3); }
}
.sg__component-name {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-wide);
}
.sg__component-name small {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
  font-weight: 400;
}
.sg__component-name .sg__used-on {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--color-text-muted);
  margin-top: var(--space-3);
  letter-spacing: var(--letter-spacing-wide);
}
.sg__component-preview {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

.sg__contrast {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}
.sg__contrast th,
.sg__contrast td {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
}
.sg__contrast thead th {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  color: var(--color-text-muted);
  background: var(--color-surface-sunk);
}
.sg__contrast tbody td:first-child,
.sg__contrast tbody td:nth-child(2) {
  font-family: var(--font-mono);
  color: var(--color-text);
}
.sg__contrast .pass {
  color: var(--color-success);
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
}
.sg__contrast .pass-lg {
  color: var(--color-warning);
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
}
.sg__contrast .decorative {
  color: var(--color-text-muted);
  font-weight: 500;
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
}

.sg__code {
  margin-top: var(--space-5);
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
  color: var(--color-text);
}

/* === PRD 10: site chrome === */
/* ============================================================
   Identical block on every page. PRDs 11-14 consume verbatim.
   - Sticky header with backdrop blur + scroll-aware bottom border.
   - 4-link primary nav (Home, Services, About, Contact); styleguide
     deliberately excluded per docs/site-information-architecture.md.
   - Persistent header CTA carries the data-track="cta" framework.
   - Mobile menu is a full-viewport overlay (100dvh) with focus trap.
   - Footer is minimal: brand line + version label.
   ============================================================ */

/* ---- SITE HEADER ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-chrome);
  background: color-mix(in srgb, var(--color-bg) 86%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration-base) var(--ease-out);
}
.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
}

.site-header__inner {
  max-width: var(--content-max-width);
  margin-inline: auto;
  padding: var(--space-4) var(--content-pad-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}
@media (max-width: 640px) {
  .site-header__inner {
    padding-inline: var(--content-pad-x-sm);
  }
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  line-height: 1;
}
.site-header__brand:hover {
  color: var(--color-text);
}

.site-header__logo {
  display: block;
  height: 28px;
  width: auto;
  max-width: 140px;
}

.site-header__brand-sub {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  color: var(--color-text-muted);
}
@media (max-width: 480px) {
  .site-header__brand-sub {
    display: none;
  }
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-size: var(--font-size-sm);
}
.site-header__nav a {
  color: var(--color-text-soft);
  text-decoration: none;
  padding: var(--space-1) 0;
  position: relative;
  min-height: 24px;
  display: inline-flex;
  align-items: center;
}
.site-header__nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--color-text);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-base) var(--ease-out);
}
.site-header__nav a:hover {
  color: var(--color-text);
}
.site-header__nav a:hover::after {
  transform: scaleX(1);
}
.site-header__nav a[aria-current="page"] {
  color: var(--color-text);
}
.site-header__nav a[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--color-primary);
}
@media (max-width: 820px) {
  .site-header__nav {
    display: none;
  }
}

.site-header__cta {
  flex-shrink: 0;
}
@media (max-width: 820px) {
  .site-header__cta {
    display: none;
  }
}

.site-header__menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-pill);
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  cursor: pointer;
  padding: 0;
}
.site-header__menu-toggle:hover {
  border-color: var(--color-text);
}
.site-header__menu-toggle svg {
  width: 18px;
  height: 18px;
  stroke-width: 1.5;
}
@media (max-width: 820px) {
  .site-header__menu-toggle {
    display: inline-flex;
  }
}

/* Mobile menu overlay */
.site-header__mobile {
  display: none;
}
@media (max-width: 820px) {
  .site-header__mobile {
    display: block;
    position: fixed;
    inset: 0;
    height: 100dvh;
    background: var(--color-bg);
    z-index: var(--z-overlay);
    padding: var(--space-7) var(--space-6);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-base) var(--ease-out);
    overflow-y: auto;
  }
  .site-header__mobile.is-open {
    opacity: 1;
    pointer-events: auto;
  }
  .site-header__mobile-nav {
    display: grid;
    gap: var(--space-5);
    margin-top: var(--space-8);
  }
  .site-header__mobile-nav a {
    font-family: var(--font-heading);
    font-size: var(--font-size-2xl);
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: var(--letter-spacing-snug);
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
  .site-header__mobile-nav a[aria-current="page"] {
    color: var(--color-primary);
  }
  .site-header__mobile-close {
    position: absolute;
    top: var(--space-5);
    right: var(--space-5);
    width: 44px;
    height: 44px;
    background: transparent;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-pill);
    color: var(--color-text);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
  }
  .site-header__mobile-close:hover {
    border-color: var(--color-text);
  }
  .site-header__mobile-close svg {
    width: 18px;
    height: 18px;
    stroke-width: 1.5;
  }
  .site-header__mobile-cta {
    margin-top: var(--space-7);
  }
}
@media (prefers-reduced-motion: reduce) {
  .site-header,
  .site-header__mobile,
  .site-header__nav a::after {
    transition: none;
  }
}

/* ---- SITE FOOTER ---- */
.site-footer {
  padding-block: var(--space-7) var(--space-9);
  border-top: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
}
.site-footer__inner {
  max-width: var(--content-max-width);
  margin-inline: auto;
  padding-inline: var(--content-pad-x);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}
@media (max-width: 640px) {
  .site-footer__inner {
    padding-inline: var(--content-pad-x-sm);
  }
}
.site-footer__brand {
  color: var(--color-text-soft);
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
}
.site-footer__brand a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--color-border-strong);
  padding-bottom: 1px;
}
.site-footer__brand a:hover {
  color: var(--color-text);
  border-color: var(--color-text);
}
.footer__version,
.site-footer__version {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-text-muted);
}

/* === PRD 11: homepage sections === */
/* ============================================================
   Ported verbatim from the Claude Design exploration
   (docs/design-explorations/claude-design-2026-05-14/project/css/style.css).
   Every value via var(--*); zero hardcoded hex / font / spacing.

   Sections, in order:
     1. HERO              (data-section="hero")
     2. SERVICES summary  (data-section="services")
     3. METHOD curve      (data-section="method")
     4. ENGAGEMENT        (data-section="engagement")
     5. PRINCIPLES        (data-section="principles")
     6. WORK placeholder  (data-section="work")
     7. CTA BAND          (data-section="cta-band")
   ============================================================ */

/* ---- 1. HERO ---- */
.hero { padding-block: var(--space-9) var(--space-8); }
@media (max-width: 640px) { .hero { padding-block: var(--space-7) var(--space-6); } }

.hero__inner {
  max-width: var(--content-max-width);
  margin-inline: auto;
  padding-inline: var(--content-pad-x);
}
@media (max-width: 640px) {
  .hero__inner { padding-inline: var(--content-pad-x-sm); }
}
.hero__eyebrow { margin-bottom: var(--space-7); }
.hero__title {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: var(--font-size-hero);
  line-height: 0.98;
  letter-spacing: var(--letter-spacing-tight);
  margin: 0 0 var(--space-7);
  max-width: 14ch;
  color: var(--color-text);
  text-wrap: balance;
}
.hero__title em { font-style: italic; color: var(--color-primary); font-weight: 400; }
.hero__sub {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-base);
  color: var(--color-text-soft);
  max-width: 60ch;
  margin: 0 0 var(--space-7);
  text-wrap: pretty;
}
.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}
.hero__note {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
  margin-left: var(--space-2);
}

/* Status strip: a modular sub-component of hero. */
.hero__status {
  margin-top: var(--space-8);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.hero__status > div {
  padding-block: var(--space-5);
  padding-inline: var(--space-5);
  border-left: 1px solid var(--color-border);
}
.hero__status > div:first-child { border-left: 0; padding-left: 0; }
.hero__status dt {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-3);
}
.hero__status dd {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: var(--font-size-xl);
  line-height: var(--line-height-snug);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-snug);
}
.hero__status-indicator {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-signal);
  margin-right: var(--space-2);
  vertical-align: middle;
  transform: translateY(-2px);
}
@media (max-width: 820px) {
  .hero__status { grid-template-columns: repeat(2, 1fr); }
  .hero__status > div:nth-child(3) { border-left: 0; padding-left: 0; }
  .hero__status > div:nth-child(n+3) { border-top: 1px solid var(--color-border); }
}
@media (max-width: 480px) {
  .hero__status { grid-template-columns: 1fr; }
  .hero__status > div { border-left: 0; padding-left: 0; }
  .hero__status > div + div { border-top: 1px solid var(--color-border); }
}

/* ---- 2. SERVICES (summary) ---- */
.services__heading {
  font-size: var(--font-size-4xl);
  margin: 0;
}
.services__group-title {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: var(--font-size-xl);
  letter-spacing: var(--letter-spacing-snug);
  margin: 0 0 var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}
.services__group-title--second { margin-top: var(--space-7); }
.services__group-num {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  letter-spacing: var(--letter-spacing-mono);
  color: var(--color-text-muted);
  text-transform: uppercase;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 4px 9px;
  border-radius: var(--radius-pill);
  font-weight: 500;
}
.services__grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-2);
}
.services__grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
@media (max-width: 900px) {
  .services__grid-2 { grid-template-columns: 1fr; }
  .services__grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .services__grid-3 { grid-template-columns: 1fr; }
}
.services__teaser {
  margin-top: var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
}
.services__more {
  margin-top: var(--space-5);
}

/* Service card (used here for the two featured cards on home). */
.svc {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  position: relative;
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
}
.svc:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}
.svc.is-open { border-color: var(--color-text); }
.svc__header { display: contents; }
.svc__title {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: var(--font-size-xl);
  line-height: var(--line-height-snug);
  margin: 0;
  letter-spacing: var(--letter-spacing-snug);
  color: var(--color-text);
}
.svc__lede {
  margin: 0;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
  color: var(--color-text-soft);
}
.svc--featured {
  padding: var(--space-6);
  overflow: hidden;
}
.svc--featured::before {
  content: "";
  position: absolute;
  inset: -1px;
  pointer-events: none;
  background: radial-gradient(50% 60% at 100% 0%, var(--color-primary-soft), transparent 60%);
  opacity: 0.7;
}
.svc--featured > * { position: relative; }
.svc--featured .svc__title { font-size: var(--font-size-2xl); max-width: 16ch; }
.svc--featured .svc__lede { font-size: var(--font-size-md); max-width: 50ch; }
.svc--aeo::before {
  background: radial-gradient(55% 60% at 100% 0%, var(--color-signal-soft), transparent 60%);
  opacity: 0.85;
}
.svc__expand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
  border: 0;
  border-top: 1px solid var(--color-border);
  padding: var(--space-4) 0 0;
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  color: var(--color-text-soft);
  text-align: left;
  min-height: 44px;
  cursor: pointer;
}
.svc__expand:hover { color: var(--color-text); }
.svc__expand-icon {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-surface-sunk);
  transition: transform var(--duration-base) var(--ease-out),
              background var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}
.svc__expand-icon svg { width: 12px; height: 12px; }
.svc.is-open .svc__expand-icon {
  transform: rotate(180deg);
  background: var(--color-text);
  color: var(--color-bg);
}
.svc__detail {
  display: grid;
  grid-template-rows: 0fr;
  overflow: hidden;
  transition: grid-template-rows var(--duration-slow) var(--ease-out);
}
.svc.is-open .svc__detail {
  grid-template-rows: 1fr;
  margin-top: var(--space-1);
}
.svc__detail > * { min-height: 0; }
.svc__detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  padding-top: var(--space-4);
}
@media (max-width: 600px) {
  .svc__detail-grid { grid-template-columns: 1fr; gap: var(--space-4); }
}
.svc__detail-sub {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-3);
}
.svc__detail-sub--gap { margin-top: var(--space-4); }
.svc__detail ul,
.svc__flat {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-2);
}
.svc__detail li,
.svc__flat li {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
  color: var(--color-text);
  padding-left: var(--space-5);
  position: relative;
}
.svc__detail li::before,
.svc__flat li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 1px;
  background: var(--color-primary);
}
.svc--aeo .svc__detail li::before { background: var(--color-signal-ink); }
.svc__stack {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
  margin: var(--space-3) 0 0;
  line-height: var(--line-height-base);
}

/* ---- 3. METHOD CURVE ---- */
.method__heading {
  font-size: var(--font-size-4xl);
  margin: 0;
}
.method__wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-6) var(--space-5);
}
.method__curve {
  width: 100%;
  height: auto;
  color: var(--color-text);
}
.method__legend {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}
@media (max-width: 720px) {
  .method__legend { grid-template-columns: 1fr; gap: var(--space-4); }
}
.method__legend > div {
  display: grid;
  grid-template-columns: 16px 1fr;
  gap: var(--space-3);
  align-items: baseline;
  row-gap: var(--space-1);
}
.method__legend-swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: var(--radius-xs);
  transform: translateY(2px);
  grid-row: span 2;
}
.method__legend-swatch--engagement { background: var(--color-primary-soft); }
.method__legend-swatch--compounding { background: var(--color-signal); }
.method__legend-swatch--expectations {
  background: var(--color-bg);
  border: 1px solid var(--color-text);
}
.method__legend strong {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-text);
}
.method__legend small {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: var(--line-height-base);
  grid-column: 2;
}

/* ---- 4. ENGAGEMENT ---- */
.engagement__wrap {
  background: var(--color-inverse-bg);
  color: var(--color-inverse-text);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-8) var(--space-7);
  position: relative;
  overflow: hidden;
}
@media (max-width: 780px) {
  .engagement__wrap { padding: var(--space-6) var(--space-5); }
}
.engagement__wrap::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(45% 60% at 90% 10%, color-mix(in srgb, var(--color-primary) 50%, transparent), transparent 65%),
    radial-gradient(40% 50% at 5% 100%, color-mix(in srgb, var(--color-accent) 35%, transparent), transparent 60%);
  pointer-events: none;
  opacity: 0.85;
}
.engagement__wrap > * { position: relative; }
.engagement__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  color: var(--color-signal);
  margin-bottom: var(--space-5);
}
.engagement__eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--color-signal);
  border-radius: 50%;
}
.engagement__grid {
  display: grid;
  grid-template-columns: 5fr 4fr;
  gap: var(--space-8);
  align-items: flex-start;
}
@media (max-width: 820px) {
  .engagement__grid { grid-template-columns: 1fr; gap: var(--space-6); }
}
.engagement__heading {
  font-family: var(--font-heading);
  color: var(--color-inverse-text);
  font-size: var(--font-size-4xl);
  line-height: var(--line-height-tight);
  margin: 0 0 var(--space-4);
  letter-spacing: var(--letter-spacing-tight);
  font-weight: 400;
}
.engagement__heading em { color: var(--color-signal); font-style: italic; font-weight: 400; }
.engagement__lede {
  color: color-mix(in srgb, var(--color-inverse-text) 80%, transparent);
  font-size: var(--font-size-md);
  line-height: var(--line-height-base);
  max-width: 48ch;
}
.engagement__meta {
  border-top: 1px solid color-mix(in srgb, var(--color-inverse-text) 15%, transparent);
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5) var(--space-6);
}
.engagement__meta dt {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  color: color-mix(in srgb, var(--color-inverse-text) 55%, transparent);
  margin: 0 0 var(--space-2);
}
.engagement__meta dd {
  margin: 0;
  font-size: var(--font-size-sm);
  color: color-mix(in srgb, var(--color-inverse-text) 92%, transparent);
  line-height: var(--line-height-base);
}
.engagement__price-card {
  background: color-mix(in srgb, var(--color-inverse-text) 5%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-inverse-text) 18%, transparent);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  backdrop-filter: blur(6px);
}
.engagement__price-meta {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  color: var(--color-signal);
  margin-bottom: var(--space-3);
}
.engagement__price {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: var(--font-size-3xl);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-inverse-text);
  margin: 0 0 var(--space-3);
}
.engagement__price-sub {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: color-mix(in srgb, var(--color-inverse-text) 65%, transparent);
  margin: 0 0 var(--space-5);
  line-height: var(--line-height-base);
  letter-spacing: var(--letter-spacing-wide);
}
.engagement__points {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-5);
  display: grid;
  gap: var(--space-2);
}
.engagement__points li {
  font-size: var(--font-size-sm);
  color: color-mix(in srgb, var(--color-inverse-text) 88%, transparent);
  padding-left: var(--space-5);
  position: relative;
  line-height: var(--line-height-base);
}
.engagement__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 10px;
  height: 1px;
  background: var(--color-signal);
}
.engagement__foot {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-5);
  max-width: 60ch;
  letter-spacing: var(--letter-spacing-wide);
}

/* ---- 5. PRINCIPLES ---- */
.principles__heading {
  font-size: var(--font-size-4xl);
  margin: 0;
}
.principles__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: var(--space-8);
}
@media (max-width: 820px) { .principles__grid { grid-template-columns: 1fr; } }
.principle {
  padding-block: var(--space-5);
  border-top: 1px solid var(--color-border);
}
.principle__title {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: var(--font-size-xl);
  line-height: var(--line-height-snug);
  margin: 0 0 var(--space-3);
  letter-spacing: var(--letter-spacing-snug);
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}
.principle__num {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-weight: 400;
  letter-spacing: var(--letter-spacing-wide);
}
.principle__body {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
  color: var(--color-text-soft);
  max-width: 44ch;
  margin: 0;
}

/* ---- 6. WORK PLACEHOLDER ---- */
.work__heading {
  font-size: var(--font-size-4xl);
  margin: 0;
}
.work__wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
}
.work__wrap::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -45deg,
    transparent 0 14px,
    color-mix(in srgb, var(--color-text) 3%, transparent) 14px 15px
  );
  opacity: 0.5;
  pointer-events: none;
}
.work__inner { position: relative; }
.work__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}
@media (max-width: 820px) { .work__grid { grid-template-columns: 1fr; } }
.work__card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  display: grid;
  gap: var(--space-2);
}
.work__num {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  color: var(--color-text-muted);
  text-transform: uppercase;
}
.work__name {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: var(--font-size-xl);
  line-height: var(--line-height-snug);
  margin: 0;
  letter-spacing: var(--letter-spacing-snug);
  color: var(--color-text);
}
.work__lede {
  margin: 0;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
  color: var(--color-text-soft);
}
.work__status {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  color: var(--color-signal-ink);
  background: var(--color-signal-soft);
  border: 1px solid color-mix(in srgb, var(--color-signal) 30%, transparent);
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  width: max-content;
  margin-top: var(--space-2);
}

/* ---- 7. CTA BAND ---- */
.cta-band {
  padding-block: var(--space-10);
  border-top: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(45% 70% at 100% 50%, var(--color-signal-soft), transparent 65%);
  pointer-events: none;
  opacity: 0.5;
}
.cta-band__inner { position: relative; }
.cta-band__heading {
  font-family: var(--font-heading);
  font-size: var(--font-size-hero);
  line-height: 1;
  max-width: 18ch;
  margin: 0 0 var(--space-6);
  font-weight: 400;
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text);
  text-wrap: balance;
}
.cta-band__heading em { font-style: italic; color: var(--color-primary); font-weight: 400; }
.cta-band__lede {
  font-size: var(--font-size-lg);
  max-width: 58ch;
  color: var(--color-text-soft);
  margin: 0 0 var(--space-6);
}
.cta-band__row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}
/* === PRD 12: services page === */
/* ============================================================
   Services page (services.html)
   ------------------------------------------------------------
   Ported from docs/design-explorations/claude-design-2026-05-14/
   project/css/style.css sections 8 (SERVICES) and 15 (CTA BAND).
   Token-driven, BEM-scoped. The expandable cards animate via
   grid-template-rows 0fr -> 1fr (no JS height calc). Reduced
   motion respected via the global token override in tokens.css.
   ============================================================ */

/* ---- Services groups ---- */
.services__group-title {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: var(--font-size-xl);
  letter-spacing: var(--letter-spacing-snug);
  margin: 0 0 var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}
.services__group-title--second {
  margin-top: var(--space-7);
}
.services__group-num {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  letter-spacing: var(--letter-spacing-mono);
  color: var(--color-text-muted);
  text-transform: uppercase;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 4px 9px;
  border-radius: var(--radius-pill);
  font-weight: 500;
}

.services__grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-2);
}
.services__grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
@media (max-width: 900px) {
  .services__grid-2 { grid-template-columns: 1fr; }
  .services__grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .services__grid-3 { grid-template-columns: 1fr; }
}

/* ---- Service card (.svc) ---- */
.svc {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  position: relative;
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
  scroll-margin-top: calc(var(--space-8) + var(--space-3));
}
.svc:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}
.svc.is-open {
  border-color: var(--color-text);
}
.svc__header {
  display: contents;
}
.svc__title {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: var(--font-size-xl);
  line-height: var(--line-height-snug);
  margin: 0;
  letter-spacing: var(--letter-spacing-snug);
  color: var(--color-text);
}
.svc__lede {
  margin: 0;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
  color: var(--color-text-soft);
}

/* ---- Featured cards (Technical SEO + AEO) ---- */
.svc--featured {
  padding: var(--space-6) var(--space-6) var(--space-5);
  overflow: hidden;
}
.svc--featured::before {
  content: "";
  position: absolute;
  inset: -1px;
  pointer-events: none;
  background: radial-gradient(50% 60% at 100% 0%, var(--color-primary-soft), transparent 60%);
  opacity: 0.7;
}
.svc--featured > * {
  position: relative;
}
.svc--featured .svc__title {
  font-size: var(--font-size-2xl);
  max-width: 16ch;
}
.svc--featured .svc__lede {
  font-size: var(--font-size-md);
  max-width: 50ch;
}
.svc--aeo::before {
  background: radial-gradient(55% 60% at 100% 0%, var(--color-signal-soft), transparent 60%);
  opacity: 0.85;
}

/* ---- Expand toggle ---- */
.svc__expand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  background: transparent;
  border: 0;
  border-top: 1px solid var(--color-border);
  padding: var(--space-4) 0 0;
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  color: var(--color-text-soft);
  text-align: left;
  min-height: 44px;
  cursor: pointer;
  width: 100%;
}
.svc__expand:hover {
  color: var(--color-text);
}
.svc__expand:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
  border-radius: var(--radius-xs);
}
.svc__expand-icon {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-surface-sunk);
  color: var(--color-text);
  transition: transform var(--duration-base) var(--ease-out),
              background var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
  flex-shrink: 0;
}
.svc__expand-icon svg {
  width: 12px;
  height: 12px;
}
.svc.is-open .svc__expand-icon {
  transform: rotate(180deg);
  background: var(--color-text);
  color: var(--color-bg);
}

/* ---- Detail panel (animates via grid-template-rows) ---- */
.svc__detail {
  display: grid;
  grid-template-rows: 0fr;
  overflow: hidden;
  transition: grid-template-rows var(--duration-slow) var(--ease-out);
}
.svc.is-open .svc__detail {
  grid-template-rows: 1fr;
  margin-top: var(--space-1);
}
.svc__detail > * {
  min-height: 0;
}
.svc__detail[hidden] {
  display: none;
}
.svc__detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  padding-top: var(--space-4);
}
@media (max-width: 600px) {
  .svc__detail-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}
.svc__detail-sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-3);
}
.svc__detail-sub--gap {
  margin-top: var(--space-4);
}
.svc__detail ul,
.svc__flat {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-2);
}
.svc__detail li,
.svc__flat li {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
  color: var(--color-text);
  padding-left: var(--space-5);
  position: relative;
}
.svc__detail li::before,
.svc__flat li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 1px;
  background: var(--color-primary);
}
.svc--aeo .svc__detail li::before {
  background: var(--color-signal-ink);
}
.svc__stack {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
  margin: var(--space-3) 0 0;
  line-height: var(--line-height-base);
}

/* ---- In-card CTA ---- */
.svc__cta {
  margin-top: var(--space-4);
}
.svc__cta--inline {
  margin-top: var(--space-4);
}
.svc__detail > .svc__flat + .svc__stack + .svc__cta--inline,
.svc__detail > .svc__flat + .svc__cta--inline {
  margin-top: var(--space-4);
}

/* ---- CTA band ---- */
.cta-band {
  padding-block: var(--space-10);
  border-top: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(45% 70% at 100% 50%, var(--color-signal-soft), transparent 65%);
  pointer-events: none;
  opacity: 0.5;
}
.cta-band__inner {
  position: relative;
}
.cta-band__heading {
  font-family: var(--font-heading);
  font-size: var(--font-size-hero);
  line-height: 1;
  max-width: 18ch;
  margin: 0 0 var(--space-6);
  font-weight: 400;
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text);
  text-wrap: balance;
}
.cta-band__heading em {
  font-style: italic;
  color: var(--color-primary);
  font-weight: 400;
}
.cta-band__lede {
  font-size: var(--font-size-lg);
  max-width: 58ch;
  color: var(--color-text-soft);
  margin: 0 0 var(--space-6);
}
.cta-band__row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

/* ---- Reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  .svc,
  .svc__detail,
  .svc__expand-icon {
    transition: none;
  }
}

/* === PRD 13: about page === */
/* ============================================================
   About page components
   ------------------------------------------------------------
   Section-scoped BEM blocks for /about. Token-driven, no
   hardcoded values. Consumes the shared chrome (PRD 10) and
   the shared .c-* / .h-display / .page-intro primitives.

   Blocks:
     .about       data-section="about-body" (body + quick-facts grid)
     .principles  data-section="principles" (6 principle cards)
     .principle   item inside .principles__grid
     .cta-band    data-section="cta-band" (closing CTA)

   If PRD 11 also defines .principles / .cta-band in this file
   above this block, the cascade is fine because both are
   identical BEM scopes; the orchestrator merges in PRD order.
   ============================================================ */

/* ---- About body + quick facts ---- */
.about {
  padding-block: 0 var(--space-9);
}
@media (max-width: 768px) {
  .about {
    padding-block: 0 var(--space-8);
  }
}
.about__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: var(--space-9);
  align-items: flex-start;
}
@media (max-width: 820px) {
  .about__grid {
    grid-template-columns: 1fr;
    gap: var(--space-7);
  }
}
.about__body {
  font-size: var(--font-size-md);
  line-height: var(--line-height-base);
  color: var(--color-text);
  text-wrap: pretty;
}
.about__body + .about__body {
  margin-top: var(--space-3);
}
.about__body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.about__body a:hover {
  color: var(--color-text);
}
.about__side {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
}
.about__side-label {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-4);
}
.about__side dl {
  display: grid;
  gap: var(--space-3);
}
.about__side dt {
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono);
  letter-spacing: var(--letter-spacing-wide);
}
.about__side dd {
  margin: 0;
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
}
.about__side-dd--mono {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-soft);
}

/* ---- Principles (six cards in a 2-column grid) ---- */
.principles {
  padding-block: var(--space-9);
  border-top: 1px solid var(--color-border);
}
@media (max-width: 768px) {
  .principles {
    padding-block: var(--space-8);
  }
}
.principles__heading {
  font-size: var(--font-size-4xl);
  margin: 0;
}
.principles__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: var(--space-8);
}
@media (max-width: 820px) {
  .principles__grid {
    grid-template-columns: 1fr;
  }
}
.principle {
  padding-block: var(--space-5);
  border-top: 1px solid var(--color-border);
}
.principle__title {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: var(--font-size-xl);
  line-height: var(--line-height-snug);
  margin: 0 0 var(--space-3);
  letter-spacing: var(--letter-spacing-snug);
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}
.principle__num {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-weight: 400;
  letter-spacing: var(--letter-spacing-wide);
}
.principle__body {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
  color: var(--color-text-soft);
  max-width: 44ch;
  margin: 0;
}
.principle__body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.principle__body a:hover {
  color: var(--color-text);
}

/* ---- CTA band (closing CTA) ---- */
.cta-band {
  padding-block: var(--space-10);
  border-top: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(45% 70% at 100% 50%, var(--color-signal-soft), transparent 65%);
  pointer-events: none;
  opacity: 0.5;
}
.cta-band__inner {
  position: relative;
}
.cta-band__heading {
  font-family: var(--font-heading);
  font-size: var(--font-size-hero);
  line-height: var(--line-height-tight);
  max-width: 18ch;
  margin: 0 0 var(--space-6);
  font-weight: 400;
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text);
  text-wrap: balance;
}
.cta-band__heading em {
  font-style: italic;
  color: var(--color-primary);
  font-weight: 400;
}
.cta-band__lede {
  font-size: var(--font-size-lg);
  max-width: 58ch;
  color: var(--color-text-soft);
  margin: 0 0 var(--space-6);
}
.cta-band__row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

/* === PRD 14: contact page + brief form === */
/* ------------------------------------------------------------
   Brief form (data-section="brief") on /contact.
   Ported verbatim in shape from the design exploration with the
   honeypot, submitting, and inline-error states added for the
   real form backend (the exploration used mailto:).
   ------------------------------------------------------------ */

.brief {
  padding-top: 0;
}
.brief__grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: var(--space-8);
  align-items: flex-start;
}
@media (max-width: 900px) {
  .brief__grid {
    grid-template-columns: 1fr;
    gap: var(--space-7);
  }
}

.brief__side {
  display: grid;
  gap: var(--space-5);
}
.brief__side-note {
  font-size: var(--font-size-md);
  color: var(--color-text-soft);
  line-height: var(--line-height-base);
  max-width: 50ch;
}
.brief__meta {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
}
.brief__meta a {
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border-strong);
  padding-bottom: 1px;
  transition: border-color var(--duration-base) var(--ease-out),
              color var(--duration-base) var(--ease-out);
}
.brief__meta a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.brief__meta-sep {
  display: inline-block;
  width: 4px;
  height: 4px;
  background: var(--color-text-muted);
  border-radius: 50%;
  margin: 0 var(--space-3);
  vertical-align: middle;
  transform: translateY(-2px);
}

.brief__form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: grid;
  gap: var(--space-5);
  box-shadow: var(--shadow-md);
  position: relative;
  transition: opacity var(--duration-base) var(--ease-out);
}
.brief__form.is-submitting {
  opacity: 0.6;
  pointer-events: none;
}

.brief__field {
  display: grid;
  gap: var(--space-2);
}
.brief__field label,
.brief__field-label {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-mono);
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.brief__field input[type="text"],
.brief__field input[type="email"],
.brief__field textarea {
  width: 100%;
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font: inherit;
  font-size: var(--font-size-md);
  line-height: var(--line-height-base);
  font-family: var(--font-body);
  min-height: 44px;
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}
.brief__field input::placeholder,
.brief__field textarea::placeholder {
  color: var(--color-text-muted);
  opacity: 0.7;
}
.brief__field input:focus,
.brief__field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}
.brief__field textarea {
  resize: vertical;
  min-height: 110px;
}

/* Chips: multi-select rendered as label-wrapped checkboxes. */
.brief__chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.chip {
  position: relative;
  display: inline-flex;
  align-items: center;
  user-select: none;
  cursor: pointer;
}
.chip input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.chip__label {
  display: inline-block;
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
  padding: var(--space-2) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  cursor: pointer;
  min-height: 36px;
  line-height: 20px;
  transition: background var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out);
}
.chip:hover .chip__label {
  color: var(--color-text);
  border-color: var(--color-border-strong);
}
.chip input:checked + .chip__label {
  background: var(--color-text);
  color: var(--color-bg);
  border-color: var(--color-text);
}
.chip input:focus-visible + .chip__label {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Segmented timeline control. */
.brief__seg {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-1);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-1);
}
@media (max-width: 540px) {
  .brief__seg {
    grid-template-columns: 1fr 1fr;
  }
}
.brief__seg label {
  position: relative;
  cursor: pointer;
}
.brief__seg input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.brief__seg-label {
  display: block;
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  min-height: 36px;
  line-height: 20px;
}
.brief__seg label:hover .brief__seg-label {
  color: var(--color-text);
}
.brief__seg input:checked + .brief__seg-label {
  background: var(--color-text);
  color: var(--color-bg);
}
.brief__seg input:focus-visible + .brief__seg-label {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.brief__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  padding-top: var(--space-1);
}
.brief__hint {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
}

/* Inline error: visible only when js/form-submit.js toggles `hidden` off. */
.brief__error {
  background: var(--color-danger-soft);
  border: 1px solid color-mix(in srgb, var(--color-danger) 35%, transparent);
  color: var(--color-text);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
}
.brief__error:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Success state: hidden until the form posts successfully. */
.brief__success {
  background: var(--color-success-soft);
  border: 1px solid color-mix(in srgb, var(--color-success) 30%, transparent);
  color: var(--color-text);
  padding: var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--font-size-md);
  line-height: var(--line-height-base);
  grid-column: 1 / -1;
}
.brief__success:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Honeypot: visually hidden but stays in the DOM so naive bots fill it.
   Real visitors cannot see, focus, or tab to it. Screen readers skip
   the wrapper because of aria-hidden on the container in the HTML. */
.form-honeypot {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}