/* =========================================================
   Supersk Process Library — Styles
   Aligned with supersk-brandbook design tokens + layout structure.
   ========================================================= */

/* =========================================================
   Design tokens — light mode (default)
   Source: supersk-brandbook/dist/css/variables.css
   ========================================================= */
:root {
  /* --- Palette (brand) --- */
  --color-primary-400: #e8b838;
  --color-primary-500: #daa520;
  --color-primary-700: #8c6800;

  --color-gray-50:  #fafafa;
  --color-gray-100: #e5e5e5;
  --color-gray-200: #cccccc;
  --color-gray-300: #a3a3a3;
  --color-gray-400: #737373;
  --color-gray-500: #525252;
  --color-gray-600: #3a3a3a;
  --color-gray-700: #2d2d2d;
  --color-gray-800: #1a1a1a;
  --color-gray-900: #0f0f0f;

  --color-accent-500: #b87333;
  --color-accent-600: #955c28;

  /* --- Semantic (light) --- */
  --bg:             #f5f5f5;
  --bg-secondary:   #fafafa;
  --surface:        #fafafa;
  --surface-2:      #e5e5e5;
  --border:         #e5e5e5;
  --border-2:       #cccccc;
  --text:           #0f0f0f;
  --text-secondary: #525252;
  --text-tertiary:  #737373;
  --muted:          #525252;
  --accent:         #daa520;
  --accent-fg:      #0f0f0f;
  --accent-dim:     rgba(218, 165, 32, 0.10);
  --accent-border:  rgba(218, 165, 32, 0.28);

  /* --- Process-specific --- */
  --canvas-bg:      #faf8f2;
  --canvas-border:  #e5e5e5;
  --grid-dot:       rgba(218, 165, 32, 0.14);
  --topbar-bg:      #f5f5f5;

  /* --- Shadows (brand) --- */
  --shadow-xs:      0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-sm:      0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-md:      0 8px 24px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-glow:    0 8px 24px rgba(240, 200, 80, 0.15);

  /* --- Typography (brand) --- */
  --font-display:   "Burlesk", system-ui, sans-serif;
  --font-base:      "Inter", system-ui, -apple-system, sans-serif;
  --font-handwritten: "Caveat", cursive;
  --font-mono:      "IBM Plex Mono", monospace;

  /* --- Radius (brand) --- */
  --radius-sm:      0.25rem;
  --radius-md:      0.5rem;
  --radius-lg:      1rem;

  /* --- Animation (brand) --- */
  --duration-fast:  150ms;
  --duration-base:  300ms;
  --easing-default: ease-in-out;

  /* --- Status (brand palette) --- */
  --color-success-500: #10b981;
  --color-warning-500: #f97316;
  --color-info-500:    #3b82f6;

  /* --- Layout --- */
  --layout-sidebar-width: 240px;
  --layout-sidebar-width-collapsed: 52px;
  --layout-content-max-width: 1080px;
  --z-sidebar: 100;
  --z-topbar: 50;
}

/* =========================================================
   Dark mode — system preference
   ========================================================= */
@media (prefers-color-scheme: dark) {
  :root {
    --bg:             #0f0f0f;
    --bg-secondary:   #1a1a1a;
    --surface:        #1a1a1a;
    --surface-2:      #2d2d2d;
    --border:         #2d2d2d;
    --border-2:       #3a3a3a;
    --text:           #f5f5f5;
    --text-secondary: #a3a3a3;
    --text-tertiary:  #737373;
    --muted:          #a3a3a3;
    --accent:         #e8b838;
    --accent-fg:      #0f0f0f;
    --accent-dim:     rgba(232, 184, 56, 0.12);
    --accent-border:  rgba(232, 184, 56, 0.30);
    --canvas-bg:      #12100a;
    --canvas-border:  #2d2d2d;
    --grid-dot:       rgba(232, 184, 56, 0.14);
    --topbar-bg:      #0f0f0f;
    --shadow-xs:      0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-sm:      0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-md:      0 8px 24px rgba(0, 0, 0, 0.35), 0 4px 12px rgba(0, 0, 0, 0.2);
    --shadow-glow:    0 8px 24px rgba(240, 200, 80, 0.22);
  }
}

/* =========================================================
   Manual overrides via data-theme attribute
   ========================================================= */
[data-theme="light"] {
  --bg:             #f5f5f5;
  --bg-secondary:   #fafafa;
  --surface:        #fafafa;
  --surface-2:      #e5e5e5;
  --border:         #e5e5e5;
  --border-2:       #cccccc;
  --text:           #0f0f0f;
  --text-secondary: #525252;
  --text-tertiary:  #737373;
  --muted:          #525252;
  --accent:         #daa520;
  --accent-fg:      #0f0f0f;
  --accent-dim:     rgba(218, 165, 32, 0.10);
  --accent-border:  rgba(218, 165, 32, 0.28);
  --canvas-bg:      #faf8f2;
  --canvas-border:  #e5e5e5;
  --grid-dot:       rgba(218, 165, 32, 0.14);
  --topbar-bg:      #f5f5f5;
  --shadow-xs:      0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-sm:      0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-md:      0 8px 24px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-glow:    0 8px 24px rgba(240, 200, 80, 0.15);
}

[data-theme="dark"] {
  --bg:             #0f0f0f;
  --bg-secondary:   #1a1a1a;
  --surface:        #1a1a1a;
  --surface-2:      #2d2d2d;
  --border:         #2d2d2d;
  --border-2:       #3a3a3a;
  --text:           #f5f5f5;
  --text-secondary: #a3a3a3;
  --text-tertiary:  #737373;
  --muted:          #a3a3a3;
  --accent:         #e8b838;
  --accent-fg:      #0f0f0f;
  --accent-dim:     rgba(232, 184, 56, 0.12);
  --accent-border:  rgba(232, 184, 56, 0.30);
  --canvas-bg:      #12100a;
  --canvas-border:  #2d2d2d;
  --grid-dot:       rgba(232, 184, 56, 0.14);
  --topbar-bg:      #0f0f0f;
  --shadow-xs:      0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-sm:      0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-md:      0 8px 24px rgba(0, 0, 0, 0.35), 0 4px 12px rgba(0, 0, 0, 0.2);
  --shadow-glow:    0 8px 24px rgba(240, 200, 80, 0.22);
}

/* =========================================================
   Custom font — Burlesk display face
   ========================================================= */
@font-face {
  font-family: 'Burlesk';
  src: url('fonts/Burlesk-Regular.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-base);
  font-size: 0.875rem;
  line-height: 1.5;
  transition: background var(--duration-base), color var(--duration-base);
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

/* =========================================================
   Sidebar
   ========================================================= */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--layout-sidebar-width);
  height: 100vh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  overflow-x: hidden;
  z-index: var(--z-sidebar);
  transition: width var(--duration-base);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 1.25rem 1.25rem 1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  flex-shrink: 0;
  min-height: 0;
  overflow: hidden;
}

.sidebar-logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  overflow: hidden;
  min-width: 0;
}
.sidebar-logo:hover { text-decoration: none; }

.sidebar-logo-full {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text);
  line-height: 1;
  white-space: nowrap;
}

.sidebar-logo-symbol {
  display: none;
  font-family: var(--font-display);
  font-size: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text);
  line-height: 1;
  text-align: center;
}

.sidebar-logo-subtitle {
  font-family: var(--font-handwritten);
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--accent);
  margin-top: 0.25rem;
  white-space: nowrap;
}

.sidebar-version {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-tertiary);
  flex-shrink: 0;
  white-space: nowrap;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  padding: 0.75rem 0;
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

.nav-group {
  border-bottom: 1px solid color-mix(in srgb, var(--border) 40%, transparent);
}
.nav-group:last-child { border-bottom: none; }

.nav-group-icon {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  opacity: 0.55;
  transition: opacity var(--duration-fast);
}
.nav-group-label:hover .nav-group-icon { opacity: 0.85; }

.nav-group-text {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-group-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.75rem 1.25rem;
  font-family: var(--font-base);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--duration-fast);
}
.nav-group-label:hover { color: var(--text-secondary); }

.nav-group-label::after {
  content: "";
  width: 0;
  height: 0;
  border-left: 0.25rem solid transparent;
  border-right: 0.25rem solid transparent;
  border-top: 0.25rem solid currentColor;
  transition: transform var(--duration-fast);
  flex-shrink: 0;
}
.nav-group.open > .nav-group-label::after { transform: rotate(0deg); }
.nav-group:not(.open) > .nav-group-label::after { transform: rotate(-90deg); }

.nav-group-items {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--duration-base) ease-out;
}
.nav-group.open > .nav-group-items { max-height: 600px; }

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  font-family: var(--font-base);
  font-size: 0.8125rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-secondary);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: all var(--duration-fast);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.nav-link:hover {
  color: var(--text);
  background: var(--surface);
  text-decoration: none;
}
.nav-link.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--surface);
}

.nav-link-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-tertiary);
}

.nav-link-back {
  padding: 0.75rem 1.25rem;
  font-weight: 500;
  color: var(--text-tertiary);
  border-left: none;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 40%, transparent);
}
.nav-link-back:hover { color: var(--text); }

.nav-back-icon {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

/* Sidebar footer (collapse button) */
.sidebar-footer {
  flex-shrink: 0;
  border-top: 1px solid var(--border);
  padding: 0.5rem;
}

.sidebar-collapse-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-family: var(--font-base);
  font-size: 0.75rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-tertiary);
  background: none;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration-fast);
}
.sidebar-collapse-btn:hover {
  color: var(--text-secondary);
  background: var(--surface);
  border-color: var(--border);
}

.sidebar-collapse-icon {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  transition: transform var(--duration-base);
}
.sidebar-collapse-text {
  white-space: nowrap;
  overflow: hidden;
}

/* Sidebar collapsed (desktop: icon-only rail) */
body.sidebar-collapsed .sidebar { width: var(--layout-sidebar-width-collapsed); }
body.sidebar-collapsed .sidebar-header { padding: 1rem 0; justify-content: center; }
body.sidebar-collapsed .sidebar-logo-full,
body.sidebar-collapsed .sidebar-logo-subtitle,
body.sidebar-collapsed .sidebar-version { display: none; }
body.sidebar-collapsed .sidebar-logo-symbol { display: block; }
body.sidebar-collapsed .nav-group-label { justify-content: center; padding: 0.75rem 0; }
body.sidebar-collapsed .nav-group-text,
body.sidebar-collapsed .nav-group-label::after { display: none; }
body.sidebar-collapsed .nav-group-icon { width: 1.25rem; height: 1.25rem; opacity: 0.7; }
body.sidebar-collapsed .nav-group-items { max-height: 0 !important; }
body.sidebar-collapsed .sidebar-collapse-btn { justify-content: center; padding: 0.5rem; }
body.sidebar-collapsed .sidebar-collapse-icon { transform: rotate(180deg); }
body.sidebar-collapsed .sidebar-collapse-text { display: none; }
body.sidebar-collapsed .sidebar-footer { padding: 0.5rem 0.25rem; }
body.sidebar-collapsed .nav-group { border-bottom-color: transparent; }
body.sidebar-collapsed .nav-link-back { display: none; }

/* =========================================================
   Hamburger (mobile only)
   ========================================================= */
.hamburger-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--duration-fast);
}
.hamburger-btn:hover { background: var(--bg-secondary); }

.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 99;
  background: rgba(0, 0, 0, 0.4);
}
body.sidebar-mobile-open .sidebar-backdrop { display: block; }

/* =========================================================
   Topbar
   ========================================================= */
.topbar {
  position: sticky;
  top: 0;
  z-index: var(--z-topbar);
  display: flex;
  align-items: center;
  height: 2.75rem;
  padding: 0 1.5rem;
  background: var(--topbar-bg);
  border-bottom: 1px solid var(--border);
  gap: 1rem;
}

.topbar-crumbs {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  overflow: hidden;
}

.topbar a {
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
  white-space: nowrap;
  transition: color var(--duration-fast);
}
.topbar a:hover { color: var(--text); text-decoration: none; }

.crumb-sep  { color: var(--border-2); font-size: 0.75rem; user-select: none; }
.crumb-cur  { color: var(--text); font-size: 0.8125rem; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.topbar-actions { margin-left: auto; flex-shrink: 0; }

/* =========================================================
   Main layout (sidebar + content)
   ========================================================= */
.main-wrapper {
  margin-left: var(--layout-sidebar-width);
  min-height: 100vh;
  transition: margin-left var(--duration-base);
}
body.sidebar-collapsed .main-wrapper {
  margin-left: var(--layout-sidebar-width-collapsed);
}

main {
  max-width: var(--layout-content-max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* =========================================================
   Page transition
   ========================================================= */
.page-enter {
  animation: pageIn var(--duration-fast) ease-out;
}

@keyframes pageIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* =========================================================
   Section (brandbook pattern)
   ========================================================= */
.section {
  margin-bottom: 4rem;
}

.section-header {
  margin-bottom: 2rem;
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: var(--font-base);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.section-subtitle {
  font-family: var(--font-base);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.section-desc {
  font-family: var(--font-base);
  font-size: 0.875rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  max-width: 600px;
}

/* =========================================================
   Hero (root page — matches brandbook dashboard)
   ========================================================= */
.hero {
  text-align: center;
  padding: 3rem 0 2rem;
}

.hero-logo {
  font-family: var(--font-display);
  font-size: clamp(3rem, 12vw, 5.5rem);
  font-weight: 400;
  letter-spacing: 0.08em;
  line-height: 1;
  text-transform: uppercase;
  color: var(--text);
  user-select: none;
}

.hero-tagline {
  font-family: var(--font-handwritten);
  font-size: 1.5rem;
  color: var(--accent);
  margin-top: 0.5rem;
}

/* =========================================================
   Button component (minimal — for theme toggle)
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-base);
  font-weight: 600;
  line-height: 1.25;
  border-width: 1.5px;
  border-style: solid;
  cursor: pointer;
  transition: all var(--duration-fast) var(--easing-default);
  white-space: nowrap;
}

.btn-sm {
  height: 2rem;
  padding: 0.25rem 0.75rem;
  font-size: 0.875rem;
  border-radius: var(--radius-md);
  gap: 0.25rem;
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}
.btn-outline:hover {
  background: var(--accent-dim);
}

.theme-icon {
  display: flex;
  align-items: center;
  line-height: 1;
}

.icon-sun  { display: none; }
.icon-moon { display: block; }

[data-theme="dark"] .icon-sun  { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) .icon-sun  { display: block; }
  html:not([data-theme="light"]) .icon-moon { display: none; }
}

/* =========================================================
   Chips — mapped to brandbook badge/tag tokens
   ========================================================= */
.chip {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border-radius: 9999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  line-height: 1.25;
  transition: background var(--duration-fast), border-color var(--duration-fast);
}

.chip-accent {
  background: var(--accent-dim);
  border-color: var(--accent-border);
  color: var(--accent);
}

.chip-mono {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.06em;
}

.chip-link { color: var(--accent); }
.chip-link:hover { text-decoration: none; background: var(--accent-dim); }

.chip-status-active {
  background: rgba(16, 185, 129, 0.10);
  border-color: rgba(16, 185, 129, 0.28);
  color: #047857;
}
.chip-status-draft {
  background: rgba(249, 115, 22, 0.10);
  border-color: rgba(249, 115, 22, 0.28);
  color: #c2410c;
}
.chip-status-review {
  background: rgba(59, 130, 246, 0.10);
  border-color: rgba(59, 130, 246, 0.28);
  color: #1d4ed8;
}

[data-theme="dark"] .chip-status-active { color: #6ee7b7; }
[data-theme="dark"] .chip-status-draft  { color: #fdba74; }
[data-theme="dark"] .chip-status-review { color: #93c5fd; }

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) .chip-status-active { color: #6ee7b7; }
  html:not([data-theme="light"]) .chip-status-draft  { color: #fdba74; }
  html:not([data-theme="light"]) .chip-status-review { color: #93c5fd; }
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 1rem;
}

/* =========================================================
   Process diagram canvas
   ========================================================= */
.canvas-wrap {
  border: 1px solid var(--canvas-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--duration-fast);
}

.canvas-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.canvas-bar-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.canvas-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.6;
}

.canvas-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
}

.mermaid-shell {
  background-color: var(--canvas-bg);
  background-image: radial-gradient(circle, var(--grid-dot) 1.5px, transparent 1.5px);
  background-size: 28px 28px;
  padding: 40px 28px;
  min-height: 380px;
  overflow: auto;
  transition: background-color var(--duration-base);
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.mermaid-shell svg { background: transparent !important; }
.mermaid-shell svg > rect:first-child { fill: transparent !important; }

.mermaid { min-width: max-content; text-align: center; }

/* =========================================================
   Diagram loading state
   ========================================================= */
@keyframes spin { to { transform: rotate(360deg); } }

.diagram-loading {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.8125rem;
  margin: auto;
  padding: 40px 0;
}

.diagram-loading-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border-2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
  flex-shrink: 0;
}

/* =========================================================
   Node details panel
   ========================================================= */
@keyframes slideIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.details-panel {
  display: none;
  margin-top: 0.75rem;
}

.details-panel.is-visible {
  display: block;
  animation: slideIn var(--duration-fast) var(--easing-default);
}

.details-inner {
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  background: var(--surface);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.details-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.125rem 1.25rem 0.875rem;
  border-bottom: 1px solid var(--border);
}

.details-close {
  flex-shrink: 0;
  appearance: none;
  border: 1px solid var(--border-2);
  background: var(--surface-2);
  color: var(--muted);
  width: 26px;
  height: 26px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font: inherit;
  font-size: 0.8125rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--duration-fast), background var(--duration-fast);
}
.details-close:hover { color: var(--text); background: var(--surface); }

.node-title {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.25;
}

.node-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 0.5rem;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.detail-card {
  padding: 1rem 1.25rem;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.detail-card:last-child { border-right: none; }

.detail-card strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.375rem;
}

.detail-card div {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--text);
  white-space: pre-wrap;
}

.detail-empty { color: var(--muted) !important; font-style: italic; }

/* =========================================================
   Area index — process grid
   ========================================================= */
.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 10px;
}

.process-card {
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1.375rem 1.125rem;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid transparent;
  color: inherit;
  text-decoration: none;
  transition: border-color var(--duration-fast),
              border-left-color var(--duration-fast),
              background var(--duration-fast),
              transform var(--duration-fast),
              box-shadow var(--duration-fast);
  box-shadow: var(--shadow-xs);
}
.process-card:hover {
  border-color: var(--border-2);
  border-left-color: var(--accent);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.625rem;
}

.id-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  padding: 3px 9px;
  border-radius: 9999px;
}

.level-badge {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
}

.process-card h2 {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin-bottom: 0.375rem;
}

.card-desc {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--muted);
  flex: 1;
  margin-bottom: 0.875rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
  flex-wrap: wrap;
}

.meta-dot { color: var(--border-2); }

/* =========================================================
   Root index — areas grid
   ========================================================= */
.areas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 8px;
}

.area-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.375rem;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid transparent;
  color: inherit;
  text-decoration: none;
  box-shadow: var(--shadow-xs);
  transition: border-color var(--duration-fast),
              border-left-color var(--duration-fast),
              background var(--duration-fast),
              transform var(--duration-fast),
              box-shadow var(--duration-fast);
}
.area-card:hover {
  border-color: var(--border-2);
  border-left-color: var(--accent);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.area-name {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.area-count {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--muted);
  white-space: nowrap;
  transition: color var(--duration-fast);
}
.area-card:hover .area-count { color: var(--accent); }

/* =========================================================
   Empty state
   ========================================================= */
.empty-state {
  color: var(--muted);
  font-size: 0.875rem;
  padding: 2.5rem 0;
  font-style: italic;
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 768px) {
  .hamburger-btn { display: flex; }

  .sidebar {
    transform: translateX(-100%);
    width: var(--layout-sidebar-width) !important;
    z-index: 100;
    transition: transform var(--duration-base);
  }

  body.sidebar-mobile-open .sidebar {
    transform: translateX(0);
  }

  body.sidebar-collapsed .sidebar-logo-full,
  body.sidebar-collapsed .sidebar-logo-subtitle,
  body.sidebar-collapsed .sidebar-version { display: revert; }
  body.sidebar-collapsed .sidebar-logo-symbol { display: none; }
  body.sidebar-collapsed .nav-group-text,
  body.sidebar-collapsed .nav-group-label::after { display: revert; }
  body.sidebar-collapsed .nav-group-label { justify-content: space-between; padding: 0.75rem 1.25rem; position: static; }
  body.sidebar-collapsed .nav-group-items { max-height: revert !important; }
  body.sidebar-collapsed .nav-group.open > .nav-group-items { max-height: 600px !important; }
  body.sidebar-collapsed .nav-group:not(.open) > .nav-group-items { max-height: 0 !important; }
  body.sidebar-collapsed .sidebar-collapse-icon { transform: none; }
  body.sidebar-collapsed .nav-link-back { display: flex; }

  .main-wrapper,
  body.sidebar-collapsed .main-wrapper { margin-left: 0; }

  .sidebar-footer { display: none; }

  main { padding: 1.5rem 1rem 3rem; }

  .process-grid { grid-template-columns: 1fr; }
  .mermaid-shell { padding: 20px 12px; }
}