/* CSS Design System for KH Medicina - Technical Index Register */
:root {
  --kc-primary: #1e4a4a;
  --kc-secondary: #6d9494;
  --kc-accent: #c07a3a;
  --kc-surface: #f5f8f8;
  --kc-ink: #0f2a2a;
  --kc-border: rgba(109, 148, 148, 0.4);
  --kc-border-strong: #6d9494;
  
  --kc-font-display: 'Cousine', monospace;
  --kc-font-body: 'IBM Plex Sans Condensed', sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  background-color: var(--kc-surface);
  color: var(--kc-ink);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--kc-font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--kc-ink);
  background-color: var(--kc-surface);
  min-height: 100vh;
}

/* Links */
a {
  color: var(--kc-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

a:hover, a:focus {
  color: var(--kc-accent);
  background-color: rgba(192, 122, 58, 0.08);
}

/* Universal List Formatting Fix for both Article and Intro Containers */
.kc-intro-flow ul, .kc-intro-flow ol,
.kc-article-prose ul, .kc-article-prose ol {
  margin-top: 1rem;
  margin-bottom: 1.25rem;
  padding-left: 2rem;
}

.kc-intro-flow li,
.kc-article-prose li {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.kc-intro-flow p,
.kc-article-prose p {
  margin-bottom: 1.25rem;
}

.kc-article-prose h2 {
  font-family: var(--kc-font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--kc-primary);
  margin-top: 2.25rem;
  margin-bottom: 1rem;
  padding-bottom: 0.35rem;
  border-bottom: 2px solid var(--kc-primary);
  text-transform: uppercase;
  letter-spacing: -0.5px;
}

.kc-article-prose h3 {
  font-family: var(--kc-font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--kc-ink);
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  border-left: 3px solid var(--kc-accent);
  padding-left: 0.75rem;
}

.kc-article-prose blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  background-color: #eaf1f1;
  border-left: 4px solid var(--kc-primary);
  font-style: italic;
}

/* Master Layout - Sidebar TOC (kc-shell & kc-rail) */
.kc-shell {
  display: flex;
  min-height: 100vh;
  max-width: 1380px;
  margin: 0 auto;
  border-left: 1px solid var(--kc-border-strong);
  border-right: 1px solid var(--kc-border-strong);
  background-color: #ffffff;
}

/* Sidebar Index Rail */
.kc-rail {
  width: 310px;
  flex-shrink: 0;
  background-color: var(--kc-surface);
  border-right: 1px solid var(--kc-border-strong);
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.kc-brand {
  border-bottom: 2px solid var(--kc-ink);
  padding-bottom: 1rem;
}

.kc-brand-title {
  font-family: var(--kc-font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--kc-ink);
  text-decoration: none;
  display: block;
}

.kc-brand-title:hover {
  background: transparent;
  color: var(--kc-accent);
}

.kc-brand-subtitle {
  font-family: var(--kc-font-display);
  font-size: 0.75rem;
  color: var(--kc-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 0.25rem;
}

/* Navigation inside Sidebar */
.kc-rail-nav-title {
  font-family: var(--kc-font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--kc-accent);
  margin-bottom: 0.75rem;
}

.kc-rail-menu {
  list-style: none;
  margin: 0;
  padding: 0;
}

.kc-rail-menu li {
  margin-bottom: 0.4rem;
}

.kc-rail-menu a {
  font-family: var(--kc-font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--kc-ink);
  text-decoration: none;
  display: block;
  padding: 0.3rem 0.5rem;
  border-left: 2px solid stroke transparent;
}

.kc-rail-menu a:hover,
.kc-rail-menu a.active {
  background-color: var(--kc-primary);
  color: #ffffff;
  border-left-color: var(--kc-accent);
}

/* Live TOC Box inside Sidebar */
.kc-toc-block {
  background-color: #eaf1f1;
  border: 1px solid var(--kc-border-strong);
  padding: 1rem;
}

.kc-toc-header {
  font-family: var(--kc-font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--kc-primary);
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px dashed var(--kc-secondary);
}

.kc-toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.kc-toc-item {
  display: flex;
  align-items: baseline;
  font-family: var(--kc-font-display);
  font-size: 0.825rem;
  margin-bottom: 0.5rem;
}

.kc-toc-item-num {
  color: var(--kc-accent);
  font-weight: 700;
  margin-right: 0.5rem;
  flex-shrink: 0;
}

.kc-toc-item-text {
  color: var(--kc-ink);
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex-shrink: 1;
}

.kc-toc-dots {
  flex-grow: 1;
  border-bottom: 1px dotted var(--kc-secondary);
  margin: 0 0.4rem;
  position: relative;
  top: -3px;
}

/* Content Column */
.kc-main-area {
  flex-grow: 1;
  min-width: 0;
  padding: 2.5rem 3rem;
  background-color: #ffffff;
}

/* Column Lede Opening (Homepage) */
.kc-lede-wrap {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 2px solid var(--kc-ink);
}

.kc-lede-title {
  font-family: var(--kc-font-display);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--kc-primary);
  text-transform: uppercase;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 3px double var(--kc-ink);
}

.kc-intro-flow {
  column-count: 2;
  column-gap: 2.5rem;
  column-rule: 1px solid var(--kc-border);
  text-align: justify;
}

/* Boxed Insert within flow */
.kc-insert-box {
  break-inside: avoid;
  -webkit-column-break-inside: avoid;
  margin: 1rem 0 1.5rem 0;
  background-color: var(--kc-surface);
  border: 2px solid var(--kc-primary);
  padding: 1.25rem;
}

.kc-insert-box-title {
  font-family: var(--kc-font-display);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--kc-accent);
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--kc-border-strong);
  padding-bottom: 0.35rem;
}

.kc-insert-list {
  list-style: none !important;
  padding: 0 !important;
  margin: 0 !important;
}

.kc-insert-item {
  margin-bottom: 0.85rem !important;
  font-size: 0.925rem;
}

.kc-insert-item-name {
  font-family: var(--kc-font-display);
  font-weight: 700;
  color: var(--kc-primary);
}

.kc-insert-item-desc {
  color: var(--kc-ink);
  font-size: 0.875rem;
}

/* Dense Index Ledger (Article List) */
.kc-ledger-section {
  margin-top: 2rem;
}

.kc-ledger-head {
  font-family: var(--kc-font-display);
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--kc-primary);
  padding-bottom: 0.5rem;
  margin-bottom: 1.25rem;
  border-bottom: 2px solid var(--kc-primary);
}

.kc-ledger-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.kc-ledger-item {
  display: flex;
  align-items: baseline;
  padding: 0.6rem 0;
  border-bottom: 1px dashed var(--kc-border);
  font-size: 1rem;
}

.kc-ledger-item:hover {
  background-color: var(--kc-surface);
}

.kc-ledger-title {
  font-family: var(--kc-font-body);
  font-weight: 600;
  color: var(--kc-ink);
  text-decoration: none;
  flex-shrink: 0;
  max-width: 75%;
}

.kc-ledger-title:hover {
  color: var(--kc-accent);
  background-color: transparent;
}

.kc-ledger-dots {
  flex-grow: 1;
  border-bottom: 1px dotted var(--kc-secondary);
  margin: 0 0.75rem;
  position: relative;
  top: -4px;
}

.kc-ledger-date {
  font-family: var(--kc-font-display);
  font-size: 0.85rem;
  color: var(--kc-secondary);
  flex-shrink: 0;
  white-space: nowrap;
}

/* Article Page Layout */
.kc-article-meta {
  font-family: var(--kc-font-display);
  font-size: 0.85rem;
  color: var(--kc-secondary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--kc-border);
  display: flex;
  gap: 1.5rem;
}

.kc-article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.kc-article-title {
  font-family: var(--kc-font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--kc-primary);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.kc-article-lead {
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--kc-ink);
  font-weight: 500;
  padding: 1.25rem;
  background-color: var(--kc-surface);
  border-left: 4px solid var(--kc-accent);
  margin-bottom: 2rem;
}

/* Footer */
.kc-footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--kc-border-strong);
  font-family: var(--kc-font-display);
  font-size: 0.8rem;
  color: var(--kc-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Responsive Rules for 375px and Mobile Screens */
@media (max-width: 900px) {
  .kc-shell {
    flex-direction: column;
    border-left: none;
    border-right: none;
  }

  .kc-rail {
    width: 100%;
    border-right: none;
    border-bottom: 2px solid var(--kc-ink);
    padding: 1.25rem 1rem;
    gap: 1.25rem;
  }

  .kc-main-area {
    padding: 1.5rem 1rem;
  }

  .kc-intro-flow {
    column-count: 1;
    column-gap: 0;
  }
}

@media (max-width: 600px) {
  .kc-lede-title {
    font-size: 1.65rem;
  }

  .kc-article-title {
    font-size: 1.5rem;
  }

  .kc-ledger-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .kc-ledger-title {
    max-width: 100%;
  }

  .kc-ledger-dots {
    display: none;
  }

  .kc-ledger-date {
    font-size: 0.75rem;
  }
}