/* ============================================================
   HOSA — Documentation Pages Stylesheet
   Extends style.css for long-form documentation content
   ============================================================ */

/* --- Doc Header --- */
.doc-header {
  padding: 120px 0 48px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-primary);
}

.doc-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  margin-bottom: 24px;
}

.doc-breadcrumb a {
  color: var(--text-tertiary);
  transition: color var(--transition-fast);
}

.doc-breadcrumb a:hover {
  color: var(--text-primary);
}

.bc-sep {
  color: var(--text-tertiary);
  font-size: 0.7rem;
}

.bc-current {
  color: var(--text-secondary);
  font-weight: 500;
}

.doc-title-block {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 14px;
}

.doc-section-number {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-subtle);
  padding: 4px 10px;
  border-radius: 4px;
  flex-shrink: 0;
}

.doc-header h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.doc-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 560px;
  margin-bottom: 16px;
}

.doc-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  flex-wrap: wrap;
}

.doc-meta-sep {
  color: var(--text-tertiary);
}

/* --- Doc Main --- */
.doc-main {
  padding: 56px 0 80px;
}

/* --- Table of Contents --- */
.doc-toc {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px 28px;
  margin-bottom: 48px;
}

.doc-toc h2 {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-tertiary);
  margin-bottom: 14px;
}

.doc-toc > ol {
  list-style: none;
  padding: 0;
  counter-reset: toc-l1;
}

.doc-toc > ol > li {
  counter-increment: toc-l1;
  margin-bottom: 6px;
}

.doc-toc > ol > li > a {
  color: var(--text-primary);
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.5;
  display: block;
  padding: 2px 0;
}

.doc-toc > ol > li > a::before {
  content: counter(toc-l1) ". ";
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.doc-toc > ol > li > a:hover {
  color: var(--accent);
}

.doc-toc ol ol {
  list-style: none;
  padding-left: 20px;
  margin-top: 2px;
  counter-reset: toc-l2;
}

.doc-toc ol ol li {
  counter-increment: toc-l2;
  margin-bottom: 2px;
}

.doc-toc ol ol a {
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 400;
  line-height: 1.5;
  display: block;
  padding: 1px 0;
}

.doc-toc ol ol a::before {
  content: counter(toc-l1) "." counter(toc-l2) " ";
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.doc-toc ol ol a:hover {
  color: var(--accent);
}

/* --- Doc Content --- */
.doc-content {
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--text-primary);
}

.doc-content section {
  margin-bottom: 48px;
}

.doc-content section:last-child {
  margin-bottom: 0;
}

.doc-content h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.doc-content section:first-child > h2 {
  border-top: none;
  padding-top: 0;
}

.doc-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.35;
  margin-top: 32px;
  margin-bottom: 14px;
}

.doc-content h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-top: 24px;
  margin-bottom: 10px;
}

.heading-number {
  font-family: var(--font-mono);
  font-size: 0.82em;
  color: var(--text-tertiary);
  margin-right: 4px;
}

.doc-content p {
  margin-bottom: 16px;
}

.doc-content p:last-child {
  margin-bottom: 0;
}

.doc-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

.doc-content em {
  font-style: italic;
}

/* --- Doc Lists --- */
.doc-list {
  margin: 16px 0;
  padding-left: 24px;
}

.doc-list li {
  margin-bottom: 8px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.doc-list li strong {
  color: var(--text-primary);
}

.doc-list-plain {
  list-style: none;
  padding-left: 0;
}

.doc-list-plain li {
  padding-left: 16px;
  position: relative;
}

.doc-list-plain li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--text-tertiary);
}

.doc-list-numbered {
  list-style: none;
  padding-left: 0;
  counter-reset: doc-ol;
}

.doc-list-numbered li {
  counter-increment: doc-ol;
  padding-left: 28px;
  position: relative;
}

.doc-list-numbered li::before {
  content: counter(doc-ol) ".";
  position: absolute;
  left: 0;
  font-family: var(--font-mono);
  font-size: 0.82em;
  font-weight: 700;
  color: var(--accent);
  top: 2px;
}

/* --- Doc Callouts --- */
.doc-callout {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 24px;
  margin: 24px 0;
  border-left: 3px solid var(--border);
}

.doc-callout-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.doc-callout p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 0;
}

.doc-callout p code {
  font-size: 0.82em;
}

.doc-callout-info {
  background: rgba(91, 168, 212, 0.04);
  border-left-color: #5ba8d4;
}

.doc-callout-info .doc-callout-title {
  color: #5ba8d4;
}

.doc-callout-critical {
  background: rgba(196, 78, 78, 0.03);
  border-left-color: var(--level-5);
}

.doc-callout-critical .doc-callout-title {
  color: var(--level-5);
}

.doc-callout-note {
  background: var(--accent-subtle);
  border-left-color: var(--accent);
}

.doc-callout-note .doc-callout-title {
  color: var(--accent);
}

/* --- Doc Blockquote --- */
.doc-blockquote {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 28px 32px;
  margin: 24px 0;
}

.doc-blockquote p {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-style: italic;
  line-height: 1.8;
  color: var(--text-primary);
  margin-bottom: 0;
}

/* --- Doc Comparison --- */
.doc-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 24px 0;
}

.doc-comparison-col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 22px;
}

.doc-comparison-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  margin-top: 0;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.doc-comparison-col .doc-list {
  margin: 0;
}

.doc-comparison-col .doc-list li {
  font-size: 0.84rem;
  margin-bottom: 6px;
}

/* --- Doc Tables --- */
.doc-table-wrap {
  overflow-x: auto;
  margin: 24px 0;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.doc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
  min-width: 600px;
}

.doc-table thead {
  background: var(--bg-secondary);
}

.doc-table th {
  padding: 12px 18px;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--border);
}

.doc-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  vertical-align: top;
  line-height: 1.6;
}

.doc-table td strong {
  color: var(--text-primary);
}

.doc-table tbody tr:last-child td {
  border-bottom: none;
}

.doc-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.015);
}

/* --- Doc Diagram --- */
.doc-diagram {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin: 24px 0;
}

.doc-diagram-title {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  text-align: center;
}

.doc-diagram-title .figure-number {
  font-weight: 700;
  color: var(--text-primary);
}

.doc-diagram-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.doc-diagram-box {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
}

.doc-diagram-box h5 {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

.doc-diagram-bio h5 {
  color: var(--text-secondary);
}

.doc-diagram-hosa h5 {
  color: var(--accent);
}

.doc-diagram-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.ddf-node {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: center;
  line-height: 1.4;
}

.ddf-node small {
  display: block;
  font-weight: 400;
  font-size: 0.72rem;
  color: var(--text-tertiary);
  margin-top: 2px;
}

.ddf-highlight {
  border-color: var(--accent-border);
  background: var(--accent-subtle);
}

.ddf-arrow {
  color: var(--text-tertiary);
  font-size: 1rem;
  flex-shrink: 0;
}

.doc-diagram-note {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-style: italic;
  text-align: center;
  margin-top: 12px;
}

/* --- Reference Links --- */
.ref-link {
  font-size: 0.78em;
  color: var(--accent);
  text-decoration: none;
  vertical-align: super;
  font-weight: 600;
}

.ref-link:hover {
  text-decoration: underline;
}

/* --- Doc References --- */
.doc-references {
  list-style: none;
  padding: 0;
  counter-reset: ref;
}

.doc-references li {
  counter-increment: ref;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 12px;
  padding-left: 32px;
  position: relative;
}

.doc-references li::before {
  content: "[" counter(ref) "]";
  position: absolute;
  left: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-tertiary);
  top: 1px;
}

.doc-references li em {
  color: var(--text-primary);
}

.doc-references li a {
  font-size: 0.82em;
}

/* --- Doc Footer Navigation --- */
.doc-nav-footer {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  gap: 16px;
}

.doc-nav-prev,
.doc-nav-next {
  flex: 1;
}

.doc-nav-next {
  text-align: right;
}

.doc-nav-footer a {
  display: inline-block;
  padding: 14px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
  transition: all var(--transition-base);
}

.doc-nav-footer a:hover {
  border-color: var(--accent-border);
}

.doc-nav-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}

.doc-nav-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* --- Responsive --- */
@media (max-width: 860px) {
  .doc-header {
    padding: 100px 0 36px;
  }

  .doc-title-block {
    flex-direction: column;
    gap: 8px;
  }

  .doc-section-number {
    align-self: flex-start;
  }

  .doc-comparison {
    grid-template-columns: 1fr;
  }

  .doc-diagram-row {
    grid-template-columns: 1fr;
  }

  .doc-diagram-flow {
    flex-direction: column;
    gap: 6px;
  }

  .ddf-arrow {
    transform: rotate(90deg);
  }
}

@media (max-width: 480px) {
  .doc-header h1 {
    font-size: 1.6rem;
  }

  .doc-toc {
    padding: 18px 20px;
  }

  .doc-callout {
    padding: 16px 18px;
  }

  .doc-blockquote {
    padding: 20px 22px;
  }

  .doc-nav-footer {
    flex-direction: column;
  }

  .doc-nav-next {
    text-align: left;
  }
}

/* --- Vertical Diagram Variant (Architecture page) --- */
.doc-diagram-vertical {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

.doc-diagram-vertical .doc-diagram-box {
  width: 100%;
  max-width: 540px;
}

.doc-diagram-bridge-vertical {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.doc-diagram-bridge-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-tertiary);
}

.ddf-arrow-v {
  font-size: 1.1rem;
  color: var(--text-tertiary);
}

.doc-diagram-flow-vertical {
  flex-direction: column !important;
  gap: 8px !important;
}

.doc-diagram-kernel-box h5 {
  color: var(--accent);
}

/* --- Figure caption used inside doc content --- */
.doc-content .figure-caption-above {
  text-align: left;
  margin-top: 24px;
}

/* ============================================================
   MATH MODEL — Formulas, Spectrum Diagram, Compact Tables
   ============================================================ */

/* --- Formulas --- */
.doc-formula {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 24px;
  margin: 20px 0;
  text-align: center;
}

.doc-formula-content {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 2;
  color: var(--text-primary);
}

.doc-formula-content em {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--text-tertiary);
}

.doc-formula-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-tertiary);
  margin-top: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Bipolar Spectrum Diagram --- */
.doc-spectrum {
  padding: 8px 0;
}

.doc-spectrum-bar {
  position: relative;
  margin-bottom: 16px;
}

.doc-spectrum-labels {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
}

.ds-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  width: 11.11%;
  text-align: center;
  padding: 4px 2px;
  border-radius: 3px;
}

.ds-neg {
  color: var(--level-1);
  background: rgba(91, 168, 212, 0.08);
}

.ds-zero {
  color: var(--accent);
  background: var(--accent-subtle);
  font-size: 0.82rem;
}

.ds-pos {
  color: var(--level-4);
  background: rgba(212, 106, 94, 0.08);
}

.doc-spectrum-names {
  display: flex;
  justify-content: space-between;
}

.doc-spectrum-names span {
  font-size: 0.62rem;
  color: var(--text-tertiary);
  width: 11.11%;
  text-align: center;
  line-height: 1.3;
}

.doc-spectrum-axes {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

.ds-axis-left,
.ds-axis-right {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  font-style: italic;
}

.ds-axis-center {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
}

/* --- Compact Table Variant --- */
.doc-table-compact td,
.doc-table-compact th {
  padding: 8px 12px;
  font-size: 0.78rem;
}

.doc-table-compact td {
  white-space: nowrap;
}

.doc-table-compact td:first-child {
  font-weight: 700;
}

/* --- Responsive adjustments for math page --- */
@media (max-width: 860px) {
  .doc-spectrum-names {
    display: none;
  }

  .ds-label {
    font-size: 0.65rem;
    padding: 3px 1px;
  }

  .doc-formula-content {
    font-size: 0.78rem;
    text-align: left;
  }

  .doc-table-compact td {
    white-space: normal;
  }
}

@media (max-width: 480px) {
  .doc-spectrum-labels {
    flex-wrap: wrap;
    gap: 2px;
  }

  .ds-label {
    width: auto;
    flex: 1;
    min-width: 28px;
  }

  .doc-spectrum-axes {
    flex-direction: column;
    gap: 4px;
    text-align: center;
  }
}