/* ========================================================================
   True Doc Tales — Report Layout
   Bootstrap 5 handles all base styling (typography, tables, code, etc.).
   This file provides the SPA shell layout, sidebar, and Bootstrap overrides.
   ======================================================================== */

/* Override Bootstrap's primary colour to match the True Doc Tales brand */
:root {
  --bs-primary: #2563eb;
  --bs-primary-rgb: 37, 99, 235;
  --bs-link-color: #2563eb;
  --bs-link-hover-color: #1d4ed8;
  /* Keep --primary as an alias so downstream code can use either */
  --primary: var(--bs-primary);
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --primary-bg: rgba(var(--bs-primary-rgb), 0.08);
  --sidebar-width: 290px;
  --sidebar-edge: 40px;
  --header-height: 3.75rem;
}

/* --- Body layout ---------------------------------------------------- */

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  padding: 0;
}

/* --- Top Header Bar ------------------------------------------------- */

.top-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 1.25rem;
  z-index: 1030;
  box-shadow: 0 1px 3px rgba(0, 0, 0, .12);
  flex-shrink: 0;
  box-sizing: border-box;
}
.top-header-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: #fff;
  max-height: 100%;
}
.top-header-brand:hover { color: #fff; text-decoration: none; }
.top-header-brand img {
  width: auto;
  height: calc(var(--header-height) - 0.75rem);
  max-height: 48px;
  aspect-ratio: 1;
  border-radius: 6px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, .2);
  margin: 0;
  flex-shrink: 0;
}
.top-header-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.top-header-brand-text .brand-title {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.top-header-brand-text .brand-subtitle {
  font-size: 0.65rem;
  font-weight: 400;
  opacity: 0.85;
  letter-spacing: 0.02em;
}
.theme-toggle {
  position: absolute;
  right: 1.25rem;
  background: rgba(255, 255, 255, .15);
  border: 1px solid rgba(255, 255, 255, .25);
  color: #fff;
  border-radius: 6px;
  padding: 0.3rem 0.6rem;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.15s;
  line-height: 1;
  display: flex;
  align-items: center;
}
.theme-toggle:hover { background: rgba(255, 255, 255, .25); }

/* Dark-mode header — subdued slate instead of the light-mode blue gradient */
[data-bs-theme="dark"] .top-header {
  background: linear-gradient(135deg, #1e293b, #334155);
  box-shadow: 0 1px 3px rgba(0, 0, 0, .3);
}

/* --- Sidebar -------------------------------------------------------- */

.sidebar {
  width: var(--sidebar-width);
  background: var(--bs-body-bg);
  border-right: 1px solid var(--bs-border-color);
  position: fixed;
  top: var(--header-height);
  left: 0;
  height: calc(100vh - var(--header-height));
  /* Collapsed to --sidebar-edge strip; slides in on hover */
  transform: translateX(calc(var(--sidebar-edge) - var(--sidebar-width)));
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.25s;
  z-index: 1020;
  display: flex;
  flex-direction: column;
  padding: 0;
}

.sidebar:hover,
.sidebar:focus-within {
  transform: translateX(0);
  box-shadow: 4px 0 20px rgba(0, 0, 0, .1);
}

/* Keep sidebar pinned while a flyout panel is open */
.sidebar.flyout-open {
  transform: translateX(0);
  box-shadow: 4px 0 20px rgba(0, 0, 0, .1);
}

/* Icon handle — visible in the collapsed strip, hides when sidebar is open */
.sidebar-handle {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.2s ease;
  z-index: 1;
}
.sidebar-handle img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, .2);
}
.sidebar:hover .sidebar-handle,
.sidebar:focus-within .sidebar-handle,
.sidebar.open .sidebar-handle {
  opacity: 0;
  pointer-events: none;
}

.sidebar-content {
  padding: 0.75rem 0;
  flex: 1;
  overflow-y: auto;
}
.sidebar-content::-webkit-scrollbar { width: 6px; }
.sidebar-content::-webkit-scrollbar-track { background: transparent; }
.sidebar-content::-webkit-scrollbar-thumb {
  background: var(--bs-border-color);
  border-radius: 3px;
}
.sidebar-content::-webkit-scrollbar-thumb:hover { background: var(--bs-secondary-color); }

.sidebar-content .nav-group-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--bs-secondary-color);
  padding: 1rem 1.5rem 0.375rem;
}
/* Chapter row — OS-style flyout trigger */
.nav-chapter {
  border-bottom: 1px solid var(--bs-border-color);
}
.nav-chapter-row {
  padding: 0.625rem 1.5rem;
  cursor: default;
  user-select: none;
  transition: background 0.15s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.nav-chapter-row:hover { background: var(--bs-tertiary-bg); }

/* Chapter title link */
.nav-chapter-row .chapter-link {
  flex: 1;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--bs-body-color);
  text-decoration: none;
  padding: 0;
  line-height: 1.4;
  transition: color 0.15s;
}
.nav-chapter-row .chapter-link:hover,
.nav-chapter-row .chapter-link.active { color: var(--bs-primary); }

/* Flyout indicator arrow */
.flyout-arrow {
  flex-shrink: 0;
  color: var(--bs-secondary-color);
  font-size: 0.9rem;
  pointer-events: none;
  line-height: 1;
}

/* Chapter / story number badge shown before the title */
.nav-number {
  display: inline-block;
  min-width: 1.4em;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--bs-secondary-color);
  opacity: 0.65;
  letter-spacing: 0;
  flex-shrink: 0;
}

/* Warning indicator for stories and chapters with failures */
.nav-error-badge {
  margin-left: auto;
  flex-shrink: 0;
  font-size: 0.85rem;
  line-height: 1;
}

/* Red title for failed stories in navigation */
.sidebar-content li a.nav-failed { color: #dc2626; }
.sidebar-content li a.nav-failed:hover { color: #b91c1c; }
#nav-flyout li a.nav-failed { color: #dc2626; }
#nav-flyout li a.nav-failed:hover { color: #b91c1c; }
.nav-chapter-row .chapter-link.nav-failed { color: #dc2626; }
.nav-chapter-row .chapter-link.nav-failed:hover { color: #b91c1c; }

/* Flyout submenu — positioned via JS to the right of the sidebar */
.flyout-menu {
  position: fixed;
  min-width: 220px;
  background: var(--bs-body-bg);
  border: 1px solid var(--bs-border-color);
  border-radius: 0 8px 8px 8px;
  box-shadow: 4px 4px 16px rgba(0, 0, 0, .12);
  z-index: 1025;
  display: none;
  padding: 0.375rem 0;
  list-style: none;
  margin: 0;
}
.flyout-menu.flyout-visible { display: block; }

/* Story items inside the global flyout panel (#nav-flyout is outside .sidebar-content) */
#nav-flyout li { display: block; list-style: none; }
#nav-flyout li a {
  display: block;
  padding: 0.375rem 1.25rem;
  color: var(--bs-secondary-color);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
#nav-flyout li a:hover { background: var(--bs-tertiary-bg); color: var(--bs-primary); }
#nav-flyout li a:focus { outline: 2px solid var(--bs-primary); outline-offset: -2px; }
#nav-flyout li a.active { color: var(--bs-primary); font-weight: 600; }

/* Reset Bootstrap's nav/list defaults inside the sidebar */
.sidebar-content ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: block;
}
/* Data-holder story lists must stay hidden inside the sidebar */
.sidebar-content .chapter-stories { display: none; }
.sidebar-content li { display: block; width: 100%; }
.sidebar-content li a {
  display: block;
  padding: 0.375rem 1.5rem;
  color: var(--bs-secondary-color);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 500;
  border-left: 3px solid transparent;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  line-height: 1.5;
}
.sidebar-content li a:hover {
  background: var(--bs-tertiary-bg);
  border-left-color: var(--primary-light);
  color: var(--bs-primary);
}
.sidebar-content li a.active {
  background: var(--primary-bg);
  border-left-color: var(--bs-primary);
  color: var(--bs-primary);
  font-weight: 600;
}

.sidebar-toggle {
  display: none;
  position: fixed;
  top: 5px;
  left: 1rem;
  z-index: 1040;
  background: var(--bs-primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.625rem 0.875rem;
  font-size: 1.25rem;
  cursor: pointer;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, .1);
  transition: background 0.15s, transform 0.15s;
}
.sidebar-toggle:hover { background: var(--primary-dark); transform: scale(1.05); }

/* --- Main content area --------------------------------------------- */

.content {
  margin-left: var(--sidebar-edge);
  margin-top: var(--header-height);
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - var(--header-height));
  padding: 0;
}

/* page-content hosts the lazily loaded <article> fragments */
#page-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

article {
  max-width: 52rem;
  margin: 0 auto;
  padding: 2.5rem 3rem 4rem;
  width: 100%;
  flex: 1;
}
article h1:first-child { margin-top: 0; }
article img { border-radius: 12px; max-width: 100%; }

/* Bootstrap-quality table styles for markdown-generated tables */
article table {
  width: 100%;
  margin-bottom: 1rem;
  vertical-align: top;
  border-color: var(--bs-border-color);
  border-collapse: collapse;
}
article table > :not(caption) > * > * {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--bs-border-color);
}
article thead > tr > th {
  font-weight: 600;
  border-bottom-width: 2px;
  border-bottom-color: var(--bs-border-color);
}

/* --- Plot description styling --------------------------------------- */

/* Step blockquotes — bordered box around each step */
article blockquote {
  border: 1px solid var(--bs-border-color);
  border-left: 4px solid var(--bs-primary);
  padding: 0.75rem 1rem;
  margin: 1rem 0 1.5rem;
  background: var(--primary-bg);
  border-radius: 0 8px 8px 0;
}

article blockquote em {
    font-style: italic;
    font-size: 1.2rem;
    background: rgba(34,197,  94, 0.15);
    border-radius: 8px;
    padding: 0.25rem 0.5rem;

}

/* Status-specific step boxes */
article blockquote.step-success {
  border-left-color: #16a34a;
  background: rgba(22, 163, 74, 0.06);
}
article blockquote.step-failure {
  border-left-color: #dc2626;
  border-color: rgba(220, 38, 38, 0.3);
  background: rgba(220, 38, 38, 0.06);
}
article blockquote.step-error {
  border-left-color: #d97706;
  border-color: rgba(217, 119, 6, 0.3);
  background: rgba(217, 119, 6, 0.06);
}
article blockquote.step-skipped {
  border-left-color: #6b7280;
  border-color: rgba(107, 114, 128, 0.3);
  background: rgba(107, 114, 128, 0.06);
}

/* Step description as a blockquote italic line */
article blockquote em:only-child {
  display: block;
  color: var(--bs-secondary-color);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* Plot binding reference intro line */
article > blockquote:first-of-type {
  border-left: 4px solid var(--bs-primary);
  padding: 0.75rem 1rem;
  margin: 1rem 0 1.5rem;
  background: var(--primary-bg);
  border-radius: 0 8px 8px 0;
}

/* H2 step sections — visual separation */
article h2 {
  border-bottom: 2px solid var(--bs-border-color);
  padding-bottom: 0.4rem;
  margin-top: 2rem;
}

/* Horizontal rule between steps */
article hr {
  border: none;
  border-top: 1px solid var(--bs-border-color);
  margin: 2rem 0;
}

/* Metadata list items (Pattern, Input type) */
article ul:has(> li > strong) {
  list-style: none;
  padding-left: 0;
  margin: 0.75rem 0;
}
article ul:has(> li > strong) > li {
  padding: 0.25rem 0;
  font-size: 0.92rem;
}

/* Code blocks inside articles — usage examples */
article pre {
  background: var(--bs-tertiary-bg);
  border: 1px solid var(--bs-border-color);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.5;
}
article pre code {
  background: transparent;
  padding: 0;
}

/* Inline code */
article code {
  background: var(--bs-tertiary-bg);
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  font-size: 0.875em;
}

/* --- Mermaid diagrams ----------------------------------------------- */

.mermaid {
  background: var(--bs-body-bg);
  padding: 2rem;
  border: 1px solid var(--bs-border-color);
  border-radius: 12px;
  margin: 1.5rem 0;
  text-align: center;
}

/* --- Previous / Next page navigation -------------------------------- */

.page-nav {
  border-top: 1px solid var(--bs-border-color);
  padding: 1.5rem 3rem;
  background: var(--bs-body-bg);
}

.page-nav-inner {
  max-width: 52rem;
  margin: 0 auto;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
}

.page-nav-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.25rem;
  border: 1px solid var(--bs-border-color);
  border-radius: 8px;
  text-decoration: none;
  color: var(--bs-body-color);
  background: var(--bs-body-bg);
  transition: border-color 0.15s, background 0.15s, color 0.15s;
  flex: 1;
  max-width: 48%;
  min-width: 0;
}

.page-nav-btn:hover {
  border-color: var(--bs-primary);
  background: var(--primary-bg);
  color: var(--bs-primary);
  text-decoration: none;
}

.page-nav-next { justify-content: flex-end; text-align: right; }
.page-nav-prev { justify-content: flex-start; text-align: left; }
.page-nav-disabled { visibility: hidden; }

.page-nav-arrow {
  font-size: 1.25rem;
  flex-shrink: 0;
  color: var(--bs-secondary-color);
  transition: color 0.15s;
}

.page-nav-btn:hover .page-nav-arrow { color: var(--bs-primary); }

.page-nav-label {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.page-nav-hint {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--bs-secondary-color);
  transition: color 0.15s;
}

.page-nav-btn:hover .page-nav-hint { color: var(--bs-primary); }

.page-nav-title {
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* --- Footer --------------------------------------------------------- */

.report-footer {
  border-top: 1px solid var(--bs-border-color);
  padding: 2rem 3rem;
  text-align: center;
  color: var(--bs-secondary-color);
  font-size: 0.8rem;
  line-height: 1.6;
  background: var(--bs-body-bg);
}
.report-footer a { font-weight: 600; }
.report-footer .footer-brand {
  font-weight: 700;
  color: var(--bs-body-color);
  font-size: 0.85rem;
}
.footer-links {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.35rem;
  margin-top: 0.25rem;
}
.footer-sep { opacity: 0.4; }
.footer-icon {
  width: 1em;
  height: 1em;
  vertical-align: -0.125em;
  fill: currentColor;
  margin-right: 0.25em;
}

/* --- Responsive ----------------------------------------------------- */

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .sidebar:hover,
  .sidebar:focus-within { transform: translateX(-100%); box-shadow: none; }
  .sidebar.open { transform: translateX(0) !important; box-shadow: 4px 0 20px rgba(0, 0, 0, .15); }
  .sidebar-toggle { display: block; }
  .content { margin-left: 0; }
  article { padding: 2rem 1.25rem 3rem; }
  .report-footer { padding: 1.5rem 1.25rem; }
  .page-nav { padding: 1.25rem; }
}

@media (max-width: 480px) {
  article { padding: 1.5rem 1rem 2.5rem; }
  .page-nav-inner { flex-direction: column; }
  .page-nav-btn { max-width: 100%; }
}

/* --- Print ---------------------------------------------------------- */

@media print {
  .top-header { display: none !important; }
  .sidebar, .sidebar-toggle { display: none !important; }
  .content { margin-left: 0 !important; margin-top: 0 !important; }
  article { max-width: none; padding: 0; }
  .report-footer { display: none; }
}