/* ============================================================
   BACKYARD TECH — Components v2
   B&W monochrome premium — Phase 3
   Order: A11y → Header → Footer → Buttons → Chips →
          Cards → Hero → Meta-card → Prose → Process →
          Arch → Forms → Layout → Utilities → Legacy v1
   ============================================================ */

/* ── Reduced-motion global ──────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ── Focus ring (global) ─────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ── Skip link ───────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--bg-elevated);
  color: var(--text);
  font-size: var(--fs-body-sm);
  text-decoration: none;
  border-radius: var(--radius-sm);
  z-index: 999;
  transition: top var(--transition-fast);
}
.skip-link:focus { top: var(--space-2); }

/* ── Nav toggle (hamburger) ──────────────────────────────────── */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: transparent;
  border: 0.5px solid var(--border);
  border-radius: var(--radius-full);
  cursor: pointer;
  padding: 0 9px;
}
.nav-toggle span {
  display: block;
  height: 1px;
  background: var(--text);
  transition: transform var(--transition-base);
}
@media (max-width: 767px) { .nav-toggle { display: flex; } }


/* ============================================================
   HEADER
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 0.5px solid var(--border);
}
[data-theme="light"] .site-header { background: rgba(250, 250, 250, 0.85); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-5);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--text);
  flex-shrink: 0;
}
.logo-mark { display: block; }
.logo-wordmark {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.05em;
  line-height: 1;
}

.site-nav {
  display: flex;
  gap: var(--space-5);
  flex: 1;
  justify-content: center;
}
.site-nav a {
  font-size: var(--fs-body-sm);
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.site-nav a:hover { color: var(--text); }
.site-nav a[aria-current="page"] { color: var(--text); }

.header-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.lang-switcher {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.lang-active { color: var(--text); }
.lang-link { color: var(--text-subtle); text-decoration: none; }
.lang-link:hover { color: var(--text); }

.theme-toggle {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 0.5px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--text);
  cursor: pointer;
  padding: 0;
  transition: border-color var(--transition-fast);
}
.theme-toggle:hover { border-color: var(--border-strong); }
[data-theme="dark"]  .theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun  { display: none; }

.nav-link {
  font-size: var(--fs-body-sm);
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.nav-link:hover { color: var(--text); }

@media (max-width: 767px) {
  .site-nav { display: none; }
  .header-controls .btn--primary,
  .header-controls .btn-primary { display: none; }
  .site-nav.is-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 0.5px solid var(--border);
    padding: var(--space-5);
    gap: var(--space-4);
    z-index: 99;
  }
}


/* ============================================================
   FOOTER
   ============================================================ */

.site-footer {
  border-top: 0.5px solid var(--border);
  padding: var(--space-9) 0 var(--space-6);
  margin-top: var(--space-10);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-7);
  margin-bottom: var(--space-7);
}
.footer-brand { display: flex; flex-direction: column; gap: var(--space-4); }
.footer-tagline { font-size: var(--fs-body-sm); color: var(--text-subtle); line-height: 1.5; }
.footer-controls { display: flex; align-items: center; gap: var(--space-3); margin-top: var(--space-2); }
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-subtle);
  margin: 0 0 var(--space-4) 0;
  font-weight: 500;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--space-2); }
.footer-col a { color: var(--text-muted); text-decoration: none; font-size: var(--fs-body-sm); transition: color var(--transition-fast); }
.footer-col a:hover { color: var(--text); }
.footer-location { display: block; font-size: 12px; color: var(--text-subtle); margin-top: var(--space-4); }
.footer-bottom {
  border-top: 0.5px solid var(--border);
  padding-top: var(--space-5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.05em;
  color: var(--text-subtle);
}
.footer-bottom-links { display: flex; gap: var(--space-5); }
.footer-bottom-links a { color: var(--text-subtle); text-decoration: none; }
.footer-bottom-links a:hover { color: var(--text-muted); }

/* Legal entity row — sits below footer-bottom, same mono micro-typography. */
.footer-legal {
  margin-top: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.05em;
  color: var(--text-subtle);
  line-height: 1.6;
}
.footer-legal p { margin: 0; }
.footer-legal a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-underline-offset: 2px;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}
.footer-legal a:hover { color: var(--text-muted); text-decoration-color: var(--text-muted); }

@media (max-width: 767px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-6); }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; gap: var(--space-4); text-align: center; }
  .footer-legal { text-align: center; }
}


/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-size: var(--fs-body-sm);
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  border: none;
  transition: opacity var(--transition-base), transform var(--transition-fast),
              border-color var(--transition-base), color var(--transition-base);
}
.btn:active { transform: translateY(1px); }

.btn--primary,
.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 12px 24px;
  background: var(--accent);
  color: var(--bg);
  border-radius: var(--radius-lg);
  font-family: var(--font-sans);
  font-size: var(--fs-body-sm);
  font-weight: 500;
  border: none;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity var(--transition-base), transform var(--transition-fast);
}
.btn--primary:hover,
.btn-primary:hover { opacity: 0.85; color: var(--bg); }
.btn--primary:active,
.btn-primary:active { transform: translateY(1px); color: var(--bg); }

.btn--secondary {
  padding: 11px 23px;
  background: transparent;
  color: var(--text);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-strong);
  transition: border-color var(--transition-base);
}
.btn--secondary:hover { border-color: var(--accent); color: var(--text); }

.btn--ghost,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 0;
  /* Touch devices need a 44px hit area (Apple HIG); on hover-capable
     desktops we keep the visual tight. */
  min-height: 32px;
  background: transparent;
  color: var(--text-muted);
  border: none;
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: var(--fs-body-sm);
  cursor: pointer;
  transition: color var(--transition-fast);
}
.btn--ghost:hover,
.btn-ghost:hover { color: var(--text); text-decoration: underline; text-underline-offset: 3px; }

/* Bump ghost-button hit area to Apple's 44px minimum on touch devices. */
@media (pointer: coarse) {
  .btn--ghost,
  .btn-ghost {
    min-height: 44px;
  }
}

.btn--with-arrow::after { content: " →"; }

/* Size modifiers */
.btn-lg { padding: 14px 28px !important; font-size: var(--fs-body) !important; }
.btn-sm { padding: 8px 14px !important; font-size: var(--fs-caption) !important; border-radius: var(--radius-sm) !important; }

/* Legacy secondary (text + circle) */
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--fs-body-sm);
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.btn-secondary:hover { color: var(--text); }
.btn-circle {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: border-color var(--transition-fast), transform var(--transition-base);
}
.btn-secondary:hover .btn-circle { border-color: var(--accent); transform: translateX(2px); }
.btn-circle svg { width: 12px; height: 12px; }

.btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  font-size: var(--fs-body-sm);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}
.btn-outline:hover { border-color: var(--accent); color: var(--text); }


/* ============================================================
   CHIPS
   ============================================================ */

.chip,
.pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1;
  border-radius: var(--radius-full);
  border: 0.5px solid var(--border-strong);
  color: var(--text-muted);
  background: transparent;
  white-space: nowrap;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}
.chip:hover,
.pill:hover { background: var(--bg-subtle); }

.chip--filled,
.pill-accent {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}
.chip--filled:hover,
.pill-accent:hover { opacity: 0.85; }

.pill-gold {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}


/* ============================================================
   CARDS
   ============================================================ */

.card {
  background: var(--bg-elevated);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-7);
  transition: border-color var(--transition-base), transform var(--transition-base);
}
.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

/* Case card — thumbnail + chip + title + desc + actions */
.card--case {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: 0;
  overflow: hidden;
}
.card--case .card__thumbnail {
  aspect-ratio: 16 / 9;
  background: var(--bg-subtle);
  position: relative;
  overflow: hidden;
}
.card--case .card__thumbnail .chip {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
}
.card--case .card__body {
  padding: var(--space-5) var(--space-6) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}
.card--case .card__title {
  font-family: var(--font-sans);
  font-size: var(--fs-h4);
  font-weight: 500;
  color: var(--text);
  margin: 0;
}
.card--case .card__description {
  font-size: var(--fs-body-sm);
  color: var(--text-muted);
  line-height: var(--lh-body);
  margin: 0;
}
.card--case .card__actions {
  display: flex;
  gap: var(--space-3);
  margin-top: auto;
  padding-top: var(--space-3);
}

/* ── Cases grid with spotlight hover (desktop) ─────────────────── */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-5);
}

/* Bump mockup text weight 400 → 500 (IBM Plex Mono Medium) for legibility
   on small labels (7-9px, wide letter-spacing, low-contrast greys).
   Stays under the "non-premium" threshold of 600+. */
.case-card .card__thumbnail svg text {
  font-weight: 500;
}

/* Spotlight uses CSS `scale` property (separate from `transform`) so it
   does NOT clash with GSAP's `transform: translateY(...)` initial-reveal
   tween on .cases-grid children. opacity is intentionally NOT in the
   transition list — GSAP animates opacity 0→1 for fade-up, and a CSS
   opacity transition would race that and visually fade the section out
   instead of in on page load. Spotlight opacity-dim snaps instead. */
.cases-grid .case-card {
  transition:
    scale 300ms cubic-bezier(0.2, 0.8, 0.2, 1),
    border-color var(--transition-base);
}
.cases-grid:has(.case-card:hover) .case-card:not(:hover) {
  scale: 0.96;
  opacity: 0.4;
}
.cases-grid .case-card:hover {
  scale: 1.10;
  z-index: 10;
  position: relative;
}

@media (max-width: 624px) {
  .cases-grid {
    gap: var(--space-4);
  }
}

/* Mobile auto-cycle focus — class hooks set/cleared by animations.js.
   :has() rules above don't fire (no hover on touch), so cycle drives focus.
   Uses `scale:` for the same GSAP-coexistence reason as desktop spotlight. */
@media (max-width: 768px) {
  .cases-grid[data-cycle-active] .case-card {
    scale: 0.97;
    opacity: 0.5;
  }
  .cases-grid[data-cycle-active] .case-card[data-cycle-focused] {
    scale: 1.05;
    opacity: 1;
    z-index: 10;
    position: relative;
  }
}

/* Metric card — mono label + serif value */
.card--metric {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-6);
}
.card--metric .card__label {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-subtle);
}
.card--metric .card__value {
  font-family: var(--font-serif);
  font-size: var(--fs-h2);
  font-weight: 600;
  color: var(--text);
  line-height: 1.1;
  letter-spacing: var(--ls-tight);
}
.card--metric .card__body {
  font-size: var(--fs-body-sm);
  color: var(--text-muted);
  line-height: 1.5;
}

/* Solution card — title + chip + outcome + link */
.card--solution {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.card--solution .card__title {
  font-size: var(--fs-h4);
  font-weight: 500;
  color: var(--text);
  margin: 0;
}
.card--solution .card__outcome {
  font-size: var(--fs-body-sm);
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
}
.card--solution .card__link {
  font-size: var(--fs-body-sm);
  color: var(--text-muted);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}
.card--solution .card__link:hover { color: var(--text); }

/* Featured — slightly heavier border */
.card--featured {
  border-color: var(--border-strong);
}


/* ============================================================
   HERO
   ============================================================ */

.hero {
  padding: var(--space-10) 0 var(--space-10);
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-7);
  align-items: start;
}

.hero__breadcrumb {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  color: var(--text-subtle);
  margin-bottom: var(--space-5);
}

.hero__display {
  font-family: var(--font-serif);
  font-size: var(--fs-display);
  font-weight: 600;
  line-height: var(--lh-display);
  letter-spacing: var(--ls-tight);
  color: var(--text);
  margin: 0 0 var(--space-5) 0;
}

.hero__sub {
  font-family: var(--font-sans);
  font-size: var(--fs-body-lg);
  font-weight: 400;
  line-height: var(--lh-body);
  color: var(--text-muted);
  max-width: 60ch;
  margin: 0 0 var(--space-6) 0;
}

.hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.hero__cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  margin-top: var(--space-6);
}

.hero__social-proof {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--text-subtle);
  letter-spacing: var(--ls-mono);
  margin-top: var(--space-3);
}

@media (max-width: 767px) {
  .hero { padding: var(--space-8) 0; }
  .hero__inner { grid-template-columns: 1fr; gap: var(--space-6); }
  .hero__display { font-size: clamp(36px, 9vw, 56px); }
  .hero__sub { font-size: var(--fs-body); }
}


/* ============================================================
   META-CARD  (right column in hero)
   ============================================================ */

.meta-card {
  background: var(--bg-elevated);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.meta-card__label {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  color: var(--text-subtle);
}

.meta-card__heading {
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 400;
  color: var(--text);
  margin: 0;
  line-height: 1.3;
}

.meta-card__body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  color: var(--text-muted);
  line-height: var(--lh-body);
  margin: 0;
}

.meta-card__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  padding-top: var(--space-4);
  border-top: 0.5px solid var(--border);
}

.meta-card__stat-label {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: var(--ls-mono);
  color: var(--text-subtle);
  display: block;
  margin-bottom: var(--space-1);
}

.meta-card__stat-value {
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 600;
  color: var(--text);
  line-height: 1.1;
}


/* ============================================================
   PROSE  (markdown body rendering)
   ============================================================ */

.prose {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--text);
  max-width: 72ch;
}
.prose > * + * { margin-top: var(--space-5); }
.prose h1 { font-family: var(--font-serif); font-size: var(--fs-h1); font-weight: 400; line-height: var(--lh-h1); letter-spacing: var(--ls-tight); margin-top: var(--space-8); }
.prose h2 { font-family: var(--font-sans); font-size: var(--fs-h2); font-weight: 500; line-height: var(--lh-h2); margin-top: var(--space-8); }
.prose h3 { font-family: var(--font-sans); font-size: var(--fs-h3); font-weight: 500; margin-top: var(--space-7); }
.prose h4 { font-family: var(--font-sans); font-size: var(--fs-h4); font-weight: 500; margin-top: var(--space-6); }
.prose p { line-height: var(--lh-body); color: var(--text-muted); }
.prose a { color: var(--text); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.prose a:hover { text-decoration-thickness: 2px; }
.prose strong { font-weight: 600; color: var(--text); }
.prose em { font-style: italic; }
.prose code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--bg-subtle);
  color: var(--text);
  padding: 2px 5px;
  border-radius: var(--radius-sm);
  border: 0.5px solid var(--border);
}
.prose pre {
  font-family: var(--font-mono);
  font-size: var(--fs-body-sm);
  background: var(--bg-elevated);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  overflow-x: auto;
  line-height: 1.6;
}
.prose pre code { background: none; border: none; padding: 0; font-size: inherit; }
.prose ul, .prose ol { padding-left: var(--space-6); }
.prose li { color: var(--text-muted); }
.prose li + li { margin-top: var(--space-2); }
.prose blockquote {
  border-left: 2px solid var(--border-strong);
  padding-left: var(--space-4);
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--text-muted);
}
.prose hr {
  border: none;
  border-top: 0.5px solid var(--border);
  margin: var(--space-7) 0;
}

/* page.html uses .page-prose for markdown body */
.page-prose { max-width: 72ch; }
.page-prose > * + * { margin-top: var(--space-5); }
.page-prose h2 { font-size: var(--fs-h2); font-weight: 500; margin-top: var(--space-8); }
.page-prose h3 { font-size: var(--fs-h3); font-weight: 500; margin-top: var(--space-7); }
.page-prose p { color: var(--text-muted); line-height: var(--lh-body); }
.page-prose a { color: var(--text); text-decoration: underline; text-underline-offset: 3px; }
.page-prose ul, .page-prose ol { padding-left: var(--space-6); color: var(--text-muted); }
.page-prose li + li { margin-top: var(--space-2); }
.page-prose code { font-family: var(--font-mono); font-size: 0.875em; background: var(--bg-subtle); padding: 2px 5px; border-radius: var(--radius-sm); }


/* ============================================================
   PROCESS DIAGRAM
   ============================================================ */

.process-diagram {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  position: relative;
}
.process-diagram::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(12.5% + var(--space-5));
  right: calc(12.5% + var(--space-5));
  height: 0.5px;
  background: var(--border);
  pointer-events: none;
}

.process-step {
  background: var(--bg-elevated);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  text-align: center;
  position: relative;
}

.process-step__number {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 500;
  color: var(--accent);
  line-height: 1;
  letter-spacing: var(--ls-mono);
}

.process-step__title {
  font-family: var(--font-sans);
  font-size: var(--fs-h4);
  font-weight: 500;
  color: var(--text);
  margin: 0;
}

.process-step__desc {
  font-size: var(--fs-body-sm);
  color: var(--text-muted);
  line-height: 1.5;
}

@media (max-width: 767px) {
  .process-diagram { grid-template-columns: 1fr; }
  .process-diagram::before { display: none; }
  .process-step { text-align: left; flex-direction: row; align-items: flex-start; gap: var(--space-4); }
  .process-step__number { flex-shrink: 0; font-size: 20px; }
}


/* ============================================================
   ARCHITECTURE PLACEHOLDER
   ============================================================ */

.arch-container {
  min-height: 400px;
  background: var(--bg-subtle);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-subtle);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: var(--ls-mono);
}

.arch-placeholder {
  text-align: center;
  color: var(--text-subtle);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
}


/* ============================================================
   FORMS
   ============================================================ */

.form-field {
  display: block;
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea,
.form-select {
  display: block;
  width: 100%;
  background: var(--bg-elevated);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  color: var(--text);
  line-height: 1.5;
  transition: border-color var(--transition-fast);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}
.form-input:focus,
.form-textarea:focus,
.form-select:focus { border-color: var(--accent); }
.form-input::placeholder,
.form-textarea::placeholder { color: var(--text-subtle); }

/* Invalid state — declared after :focus on equal specificity, so a focused +
   invalid field shows the error border (error wins over accent). */
.form-input[aria-invalid="true"],
.form-textarea[aria-invalid="true"],
.form-select[aria-invalid="true"] { border-color: var(--color-error); }

/* Checkboxes don't have a CSS-controllable border — use an outline
   ring around the native control instead. Same token, same minimalism. */
input[type="checkbox"][aria-invalid="true"] {
  outline: 2px solid var(--color-error);
  outline-offset: 2px;
  border-radius: 2px;
}

.form-error-msg {
  display: block;
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  color: var(--color-error);
  line-height: var(--lh-micro);
}
.form-error-msg[hidden] { display: none; }

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' stroke='%23666' stroke-width='1' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  padding-right: var(--space-8);
  cursor: pointer;
}


/* ============================================================
   DIRECT CONTACT — pivot v2
   Single-section block replacing the contact form. Three
   channel cards (Telegram primary, email, LinkedIn) + meta row.
   ============================================================ */

.direct-contact {
  padding: var(--space-9) 0;
}

.direct-contact__lede {
  font-size: var(--fs-body-lg);
  color: var(--text-muted);
  max-width: 60ch;
  line-height: var(--lh-body);
  margin: 0 0 var(--space-7) 0;
}

.direct-contact__channels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-5);
}

.direct-contact__meta {
  margin-top: var(--space-7);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-7);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--text-subtle);
  letter-spacing: var(--ls-mono);
}
.direct-contact__meta strong {
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: var(--ls-wide);
}

.contact-channel {
  display: block;
  padding: var(--space-5) var(--space-6);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  text-decoration: none;
  color: var(--text);
  transition: border-color var(--transition-fast), transform var(--transition-base);
}
.contact-channel:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}
.contact-channel--primary {
  border-width: 1px;
  border-color: var(--border-strong);
}
.contact-channel__label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  color: var(--text-subtle);
  margin-bottom: var(--space-2);
}
.contact-channel__handle {
  display: block;
  font-size: var(--fs-body-lg);
  font-weight: 500;
  color: var(--text);
}
.contact-channel__hint {
  display: block;
  font-size: var(--fs-body-sm);
  color: var(--text-muted);
  margin-top: var(--space-2);
}


/* ============================================================
   LAYOUT + SECTION
   ============================================================ */

.section {
  padding: var(--space-9) 0;
}
@media (max-width: 767px) { .section { padding: var(--space-7) 0; } }

.section--inverted {
  background: var(--text);
  color: var(--bg);
}
.section--inverted .btn--primary,
.section--inverted .btn-primary {
  background: var(--bg);
  color: var(--text);
}

/* page-content: main element — pad-top for sticky header */
.page-content { padding-top: 0; }


/* ============================================================
   UTILITIES
   ============================================================ */

.divider {
  border: none;
  border-top: 0.5px solid var(--border);
  margin: var(--space-6) 0;
}

.section-label {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  color: var(--text-subtle);
  margin-bottom: var(--space-4);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.mono { font-family: var(--font-mono); letter-spacing: var(--ls-mono); }
.text-accent { color: var(--accent); }

/* Scroll-reveal animation classes (used by animations.js) */
.anim-fade-in { opacity: 0; animation: fadeIn 0.5s ease forwards; }
.anim-fade-up { opacity: 0; transform: translateY(8px); animation: fadeUp 0.5s ease forwards; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.35s; }
.delay-4 { animation-delay: 0.5s; }

@keyframes fadeIn { to { opacity: 1; } }
@keyframes fadeUp { to { opacity: 1; transform: translateY(0); } }

/* data-reveal (IntersectionObserver hook in animations.js) */
.reveal-hidden { opacity: 0; transform: translateY(8px); }
.reveal-visible { opacity: 1; transform: none; transition: opacity 0.4s ease, transform 0.4s ease; }


/* ============================================================
   PAGE TEMPLATES (legacy page.html + case.html structure)
   ============================================================ */

.page-hero {
  padding: var(--space-10) 0 var(--space-7);
}
.page-hero-text h1 { margin-bottom: var(--space-4); }
.page-hero-text p { font-size: var(--fs-body-lg); color: var(--text-muted); max-width: 60ch; }

.page-body {
  padding: var(--space-7) 0 var(--space-10);
}

/* Portfolio index grid */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
@media (max-width: 1023px) {
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 599px) {
  .portfolio-grid { grid-template-columns: 1fr; }
}

.section-head {
  margin-bottom: var(--space-7);
}
.section-head h2 { margin-top: var(--space-3); }

.section-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--space-7);
  gap: var(--space-4);
}


/* ============================================================
   CASE PAGE — hero, prose, metrics, nav, testimonial, badge, chips
   ============================================================ */

/* Back link */
.case-back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-subtle);
  text-decoration: none;
  margin-bottom: var(--space-5);
  transition: color var(--transition-fast);
}
.case-back-link:hover { color: var(--text-muted); }

/* Hero section */
.case-hero { padding: var(--space-9) 0 var(--space-7) 0; }
.case-hero__category { margin-bottom: var(--space-4); }
.case-hero__title {
  font-family: var(--font-serif);
  font-size: var(--fs-h1);
  font-weight: 400;
  letter-spacing: var(--ls-tight);
  color: var(--text);
  margin: 0 0 var(--space-3) 0;
  line-height: 1.15;
}
.case-hero__client {
  font-size: var(--fs-body-lg);
  font-weight: 500;
  color: var(--text-muted);
  margin: 0 0 var(--space-4) 0;
}
.case-hero__subtitle {
  font-size: var(--fs-body-lg);
  color: var(--text-muted);
  max-width: 66ch;
  line-height: 1.65;
  margin: 0;
}

/* Metric fact row */
.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-5);
}
@media (max-width: 767px) { .metric-grid { grid-template-columns: repeat(2, 1fr); } }

/* Prose body — h2 becomes section-label */
.case-prose { max-width: 72ch; }
.case-prose h2 {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-subtle);
  margin: var(--space-9) 0 var(--space-4) 0;
}
.case-prose h2:first-child { margin-top: 0; }
.case-prose p {
  font-size: var(--fs-body-lg);
  color: var(--text-muted);
  line-height: 1.75;
  margin: 0 0 var(--space-4) 0;
}
.case-prose ul, .case-prose ol { padding-left: var(--space-5); margin: 0 0 var(--space-4) 0; }
.case-prose li {
  font-size: var(--fs-body-lg);
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: var(--space-2);
}
.case-prose strong { color: var(--text); font-weight: 500; }
.case-prose a { color: var(--text); text-decoration-color: var(--border-strong, var(--text-muted)); }
.case-prose a:hover { text-decoration-color: var(--text); }

/* Pitch stage banner */
.case-pitch-banner {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: var(--bg-elevated);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--space-6);
}

/* Testimonial */
.case-testimonial {
  border-left: 2px solid var(--text);
  padding: var(--space-5) var(--space-7);
  margin: 0;
  background: var(--bg-elevated);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.case-testimonial__quote {
  font-family: var(--font-serif);
  font-size: var(--fs-body-lg);
  color: var(--text);
  font-style: italic;
  line-height: 1.65;
  margin: 0 0 var(--space-4) 0;
}
.case-testimonial__author {
  font-size: var(--fs-body-sm);
  color: var(--text-muted);
}

/* Architecture placeholder */
.arch-placeholder-box {
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  background: var(--surface);
}
.arch-placeholder-text {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-subtle);
  margin: 0 0 var(--space-2) 0;
}
.arch-placeholder-note {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--text-subtle);
  opacity: 0.6;
  margin: 0;
}

/* Related cases nav row */
.case-related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
  margin-top: var(--space-5);
}

/* Case navigation prev/next */
.case-nav {
  padding: var(--space-7) 0;
  border-top: 0.5px solid var(--border);
}
.case-nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-5);
}
.case-nav-link {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  text-decoration: none;
  max-width: 240px;
}
.case-nav-direction {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-subtle);
}
.case-nav-title {
  font-size: var(--fs-body);
  color: var(--text-muted);
  transition: color var(--transition-fast);
}
.case-nav-link:hover .case-nav-title { color: var(--text); }

.badge { display: inline-flex; align-items: center; padding: 3px 8px; background: var(--bg-subtle); border: 0.5px solid var(--border); border-radius: var(--radius-sm); font-family: var(--font-mono); font-size: var(--fs-micro); color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.badge-accent { background: var(--text); color: var(--bg); border-color: var(--text); }

.tech-chips { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-4); }
.tech-chip { font-family: var(--font-mono); font-size: var(--fs-micro); color: var(--text-subtle); background: var(--bg-subtle); border: 0.5px solid var(--border); border-radius: var(--radius-sm); padding: 3px 8px; text-transform: uppercase; }