/* ══════════════════════════════════════════════════════════════════════
   guide.css — DRM Brand Guide
   Shared layout, navigation chrome, and content patterns for the
   multi-page brand guide. Consumed alongside brand.css on every page.
   ══════════════════════════════════════════════════════════════════════ */

/* ── Skip link ────────────────────────────────────────────────────── */

.brand_skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-xs);
  z-index: 200;
  padding: var(--space-xxs) var(--space-xs);
  background: var(--color-accent);
  color: var(--color-bg-primary);
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: var(--font-size-small);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: var(--radius-sm);
  text-decoration: none;
}
.brand_skip-link:focus {
  top: var(--space-xs);
}

/* ── Grid layout ──────────────────────────────────────────────────── */

.brand_layout {
  display: grid;
  grid-template-columns: 16rem 1fr;
  min-height: 100dvh;
}

.brand_sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  background: var(--color-bg-secondary);
  border-right: 1px solid var(--color-border-default);
  padding: var(--space-md) 0;
  display: flex;
  flex-direction: column;
  z-index: 10;
}

.brand_main {
  padding: var(--space-xl) var(--space-2xl);
  max-width: 64rem;
}

/* ── Mobile top bar + drawer ──────────────────────────────────────── */

.brand_topbar {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 3.5rem;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border-default);
  align-items: center;
  padding: 0 var(--space-xs);
}

.brand_hamburger {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: none;
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text-primary);
}
.brand_hamburger svg {
  width: 1.25rem;
  height: 1.25rem;
  fill: currentColor;
}

.brand_topbar-title {
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: var(--font-size-small);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-primary);
  margin-left: var(--space-xs);
}

.brand_overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9;
  background: oklch(0 0 0 / 0.5);
}

@media (width < 48rem) {
  .brand_layout {
    grid-template-columns: 1fr;
  }

  .brand_topbar {
    display: flex;
  }

  .brand_sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 16rem;
    transform: translateX(-100%);
    visibility: hidden;
    transition: transform 0.25s ease, visibility 0.25s;
    z-index: 50;
  }

  .brand_sidebar.is-open {
    transform: translateX(0);
    visibility: visible;
  }

  .brand_overlay.is-open {
    display: block;
  }

  .brand_main {
    padding: calc(3.5rem + var(--space-lg)) var(--space-xs) var(--space-lg);
  }

  @media (prefers-reduced-motion: reduce) {
    .brand_sidebar {
      transition: none;
    }
  }
}

/* ── Sidebar nav ──────────────────────────────────────────────────── */

.brand_nav-logo {
  display: block;
  padding: 0 var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border-default);
  margin-bottom: var(--space-sm);
}
.brand_nav-logo img {
  width: 100%;
  height: auto;
}

.brand_nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  flex: 1;
  position: relative;
}
/* Vertical progression line */
.brand_nav-list::before {
  content: '';
  position: absolute;
  top: 0.75rem;
  bottom: 0.75rem;
  left: calc(var(--space-sm) + 0.875rem);
  width: 1px;
  background: var(--color-border-default);
}
.brand_nav-list li {
  margin: 0;
  position: relative;
}
.brand_nav-list a {
  display: flex;
  align-items: center;
  gap: var(--space-xxs);
  padding: var(--space-xxs) var(--space-sm);
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: var(--font-size-small);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: var(--transition);
}
.brand_nav-list a:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
  opacity: 1;
}
.brand_nav-list a[aria-current="page"] {
  color: var(--color-accent);
  background: var(--color-bg-tertiary);
}

/* Step number */
.brand_nav-step {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  flex-shrink: 0;
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: var(--font-size-tiny);
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
  background: var(--color-bg-tertiary);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-default);
  position: relative;
  z-index: 1;
  transition: var(--transition);
}
a:hover .brand_nav-step {
  border-color: var(--color-text-secondary);
  color: var(--color-text-primary);
}
a[aria-current="page"] .brand_nav-step {
  background: var(--color-accent);
  color: var(--color-bg-primary);
  border-color: var(--color-accent);
}

.brand_nav-footer {
  padding: var(--space-sm);
  border-top: 1px solid var(--color-border-default);
  margin-top: auto;
}

/* ── Theme toggle ─────────────────────────────────────────────────── */

.brand_toggle {
  position: relative;
  display: flex;
  align-items: center;
  width: 4.5rem;
  height: 2.5rem;
  padding: 0.25rem;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-default);
  border-radius: 2rem;
  cursor: pointer;
  transition: var(--transition);
}
.brand_toggle:hover {
  border-color: var(--color-accent);
}

.brand_toggle-indicator {
  position: absolute;
  top: 0.25rem;
  left: 0.25rem;
  width: 1.875rem;
  height: 1.875rem;
  background: var(--color-bg-secondary);
  border-radius: 50%;
  transition: transform 0.25s ease;
}
[data-theme="light"] .brand_toggle-indicator {
  transform: translateX(0);
}
[data-theme="dark"] .brand_toggle-indicator {
  transform: translateX(2rem);
}

.brand_toggle-icon {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.875rem;
  height: 1.875rem;
  flex-shrink: 0;
}
.brand_toggle-icon svg {
  width: 1rem;
  height: 1rem;
  transition: var(--transition);
}
.brand_toggle-icon.brand_icon-sun svg {
  fill: var(--color-text-muted);
}
.brand_toggle-icon.brand_icon-moon svg {
  fill: var(--color-text-muted);
  transform: translateX(3px);
}
[data-theme="light"] .brand_toggle-icon.brand_icon-sun svg {
  fill: var(--color-accent);
}
[data-theme="dark"] .brand_toggle-icon.brand_icon-moon svg {
  fill: var(--color-accent);
}

/* ── Page header ──────────────────────────────────────────────────── */

.brand_page-header {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border-default);
}
.brand_page-header h1 {
  font-family: var(--font-display);
  font-size: var(--font-size-h1);
  color: var(--color-text-primary);
  line-height: var(--line-height-tight);
  margin: 0;
}
.brand_page-header p {
  font-size: var(--font-size-medium);
  color: var(--color-text-secondary);
  margin-top: var(--space-xxs);
  max-width: 52ch;
}

/* ── Section labels ───────────────────────────────────────────────── */

.brand_section-label {
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: var(--font-size-small);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-accent);
  margin-bottom: var(--space-sm);
}

/* ── Content section spacing ──────────────────────────────────────── */

.brand_section {
  margin-bottom: var(--space-2xl);
}

/* ── Color swatches ───────────────────────────────────────────────── */

.brand_swatch-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.67rem;
}
.brand_swatch-grid.is-wide {
  grid-template-columns: repeat(6, 1fr);
}

.brand_swatch {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  position: relative;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.brand_swatch:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.brand_swatch-block {
  height: 4.44rem;
}

.brand_swatch-info {
  padding: 0.67rem 0.78rem;
  background: var(--bedrock);
}

.brand_swatch-name {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--font-size-small);
  color: var(--limestone);
}

.brand_swatch-role {
  font-family: var(--font-body);
  font-size: var(--font-size-tiny);
  color: var(--silver-fern);
  margin-top: 0.11rem;
}

.brand_swatch-hex {
  font-family: var(--font-mono);
  font-size: var(--font-size-tiny);
  color: var(--ore-dim);
  letter-spacing: 0.03rem;
  margin-top: 0.22rem;
}

.brand_swatch-toast {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--bedrock);
  color: var(--ore);
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: var(--font-size-tiny);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.33rem 0.67rem;
  border-radius: var(--radius-sm);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  box-shadow: var(--shadow-md);
}
.brand_swatch-toast.show {
  opacity: 1;
}

/* ── Do / Don't grids ─────────────────────────────────────────────── */

.brand_rules-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

.brand_rule {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  border: 1px solid var(--color-border-default);
}
.brand_rule h4 {
  font-size: var(--font-size-small);
  margin-bottom: var(--space-xxs);
}
.brand_rule p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
}
.brand_rule.is-do {
  border-left: 3px solid var(--moss);
}
.brand_rule.is-dont {
  border-left: 3px solid var(--ember);
}

/* ── Cards (story, voice traits, usage rules, etc.) ───────────────── */

.brand_card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}
.brand_card-grid.is-3col {
  grid-template-columns: repeat(3, 1fr);
}
.brand_card-grid.is-4col {
  grid-template-columns: repeat(4, 1fr);
}

.brand_card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
}
.brand_card h3 {
  margin-top: 0;
}
.brand_card h4 {
  margin-top: 0;
}

/* ── Scheme demo cards ────────────────────────────────────────────── */

.brand_scheme-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
}

.brand_scheme-demo {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
}
.brand_scheme-demo h3 {
  font-size: var(--font-size-h5);
  margin: 0 0 var(--space-xxs) 0;
}
.brand_scheme-demo p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-regular);
  margin: 0 0 var(--space-xs) 0;
}

.brand_scheme-card {
  display: inline-block;
  padding: var(--space-xxs) var(--space-xs);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-small);
  color: var(--color-text-primary);
}

.brand_scheme-cta {
  display: inline-block;
  padding: var(--space-xxs) var(--space-sm);
  background: var(--color-accent);
  color: var(--color-bg-primary);
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: var(--font-size-small);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
  margin-left: var(--space-xxs);
}

/* ── Type specimens ───────────────────────────────────────────────── */

.brand_specimen {
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-sm);
  background: var(--color-bg-secondary);
}

.brand_specimen-label {
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: var(--font-size-tiny);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-accent);
  margin-bottom: var(--space-xxs);
}

.brand_specimen-meta {
  font-family: var(--font-mono);
  font-size: var(--font-size-tiny);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

/* ── Logo display ─────────────────────────────────────────────────── */

.brand_logo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

.brand_logo-box {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl) var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-default);
  min-height: 12rem;
}
.brand_logo-box img {
  max-width: 16rem;
  height: auto;
}
.brand_logo-box.is-dark {
  background: var(--deeproot);
}
.brand_logo-box.is-light {
  background: var(--chalk);
}

.brand_logo-marks {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
}

.brand_logo-mark {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xxs);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-default);
  text-align: center;
}
.brand_logo-mark img {
  max-width: 4rem;
  height: auto;
}
.brand_logo-mark span {
  font-size: var(--font-size-tiny);
  color: var(--color-text-muted);
}

/* ── Tone spectrum bar ────────────────────────────────────────────── */

.brand_tone-bar {
  height: 0.5rem;
  border-radius: 999px;
  background: linear-gradient(to right, var(--ore), var(--canopy), var(--sage));
  margin: var(--space-sm) 0;
}
.brand_tone-labels {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: var(--font-size-tiny);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

/* ── Two-column lists (We Say / We Don't Say) ─────────────────────── */

.brand_two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}
.brand_two-col h4 {
  margin-top: 0;
}

/* ── Voice example blocks ─────────────────────────────────────────── */

.brand_example {
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-sm);
}
.brand_example-header {
  padding: var(--space-xxs) var(--space-sm);
  background: var(--color-bg-tertiary);
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: var(--font-size-tiny);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-accent);
}
.brand_example-body {
  padding: var(--space-sm);
  font-size: var(--font-size-regular);
  line-height: var(--line-height-normal);
}

/* ── Quick-reference link cards (index page) ──────────────────────── */

.brand_ref-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
}

.brand_ref-card {
  display: block;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  text-decoration: none;
  transition: var(--transition);
}
.brand_ref-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  opacity: 1;
}
.brand_ref-card h3 {
  margin: 0 0 var(--space-xxs) 0;
  color: var(--color-text-primary);
}
.brand_ref-card p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin: 0;
}
.brand_ref-step {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--font-size-tiny);
  font-weight: 700;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xxs);
}

/* ── Responsive ───────────────────────────────────────────────────── */

@media (width < 48rem) {
  .brand_swatch-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .brand_swatch-grid.is-wide {
    grid-template-columns: repeat(3, 1fr);
  }
  .brand_card-grid,
  .brand_rules-grid,
  .brand_two-col,
  .brand_logo-grid {
    grid-template-columns: 1fr;
  }
  .brand_card-grid.is-3col,
  .brand_card-grid.is-4col {
    grid-template-columns: 1fr 1fr;
  }
  .brand_scheme-grid {
    grid-template-columns: 1fr;
  }
  .brand_logo-marks {
    grid-template-columns: repeat(2, 1fr);
  }
  .brand_ref-grid {
    grid-template-columns: 1fr;
  }
}

@media (width < 30rem) {
  .brand_swatch-grid,
  .brand_swatch-grid.is-wide {
    grid-template-columns: repeat(2, 1fr);
  }
  .brand_card-grid.is-3col,
  .brand_card-grid.is-4col {
    grid-template-columns: 1fr;
  }
}