/* ========= COLOR SYSTEM ========= */
html,
body.manual-page {
  background-color: var(--bg-page);
}

:root {
  /* Dark body */
  --bg-page: #050609;    /* darker than #14171b */
  --bg-panel: #1f2328;
  --bg-nav: #1f2328;
  
  --text-main: #e5f0f5;
  --text-muted: #9ca3af;
  --text-invert: #f9fafb;

  --border-soft: #2a3d4c;

  --brand-blue: #00bfff;   /* OmniControl blue */
  --brand-orange: #f7931e; /* OmniControl orange */
  --brand-green: #16a34a;  /* DWC green */

  --shadow-soft: 0 16px 40px rgba(0, 0, 0, 0.6);
}

/* ========= ROOT & GLOBAL ========= */

.manual-page {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text-main);
    background: radial-gradient(circle at top, #050609 0, var(--bg-page) 60%);
  line-height: 1.6;
}

.manual-page a {
  color: var(--brand-blue);
  text-decoration: none;
}

.manual-page a:hover,
.manual-page a:focus {
  text-decoration: underline;
}

.manual-page h1,
.manual-page h2,
.manual-page h3,
.manual-page h4 {
  font-weight: 600;
  color: #f9fafb;
  margin-top: 1.2em;
  margin-bottom: 0.5em;
}

/* Visually hidden (for screen readers) */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  border: 0;
  padding: 0;
  white-space: nowrap;
  clip-path: inset(50%);
  clip: rect(0 0 0 0);
  overflow: hidden;
}

/* ========= HEADER ========= */

.site-header {
  background: linear-gradient(120deg, #14171b, #14171b);
  border-bottom: 1px solid rgba(148, 163, 184, 0.4);
  padding: 0.85rem 1.5rem;
  color: var(--text-invert);
}

.site-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  justify-content: space-between;
}

.site-title-block {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-logo {
  height: 100px;
  width: auto;
  border-radius: 0.75rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
}

.site-title-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.site-title {
  font-size: 1.5rem;
  margin: 0;
  color: var(--text-invert);
}

.site-subtitle {
  font-size: 0.9rem;
  margin: 0;
  color: #cbd5f5;
}

/* ========= LAYOUT ========= */

.manual-layout {
  max-width: 1200px;
  margin: 1.75rem auto 2.5rem;
  display: grid;
  grid-template-columns: minmax(200px, 260px) minmax(0, 1fr);
  gap: 1.5rem;
  padding: 0 1.5rem;
}

/* Left nav */

.manual-nav {
  border-radius: 0.9rem;
  background: var(--bg-nav);
  border: 1px solid var(--border-soft);
  padding: 1rem;
  align-self: flex-start;
  position: sticky;
  top: 1rem;
  box-shadow: var(--shadow-soft);
}

.nav-heading {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.nav-sections {
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-sections li {
  margin: 0.15rem 0;
}

.nav-sections a {
  display: block;
  padding: 0.25rem 0.3rem;
  border-radius: 0.4rem;
  font-size: 0.93rem;
  color: var(--text-main);
}

.nav-sections a:hover {
  background: rgba(22, 163, 74, 0.16); /* soft DWC green glow */
}

/* Main content panel */

.manual-content {
  border-radius: 1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  padding: 1.75rem;
  box-shadow: var(--shadow-soft);
}

/* ========= SEARCH ========= */

.manual-search {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  max-width: 260px;
  width: 100%;
}

#manual-search {
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.8);
  background: rgba(15, 23, 42, 0.65);
  color: var(--text-invert);
  padding: 0.4rem 0.9rem;
  font-size: 0.9rem;
}

#manual-search::placeholder {
  color: #94a3b8;
}

#manual-search:focus {
  outline: 2px solid var(--brand-blue);
  outline-offset: 1px;
  background: #020617;
}

.search-count {
  font-size: 0.8rem;
  color: #cbd5f5;
}

/* ========= CHAPTER / CONTENT ========= */

.chapter-header p {
  margin-top: 0.3rem;
  color: var(--text-muted);
}

.manual-content p {
  margin-top: 0.35rem;
  margin-bottom: 0.7rem;
}

.manual-content ol,
.manual-content ul {
  margin-top: 0.35rem;
  margin-bottom: 0.7rem;
  padding-left: 1.3rem;
}

.manual-content li + li {
  margin-top: 0.15rem;
}

/* Tables */

.manual-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 0.75rem 0;
  font-size: 0.9rem;
}

.manual-content th,
.manual-content td {
  border: 1px solid #1f2937;
  padding: 0.4rem 0.6rem;
}

.manual-content thead {
  background: rgba(0, 191, 255, 0.14); /* faint Omni blue */
}

.manual-content tbody tr:nth-child(odd) {
  background: rgba(15, 23, 42, 0.5);
}

/* Inline keyboard-style labels */

.kbd {
  display: inline-block;
  padding: 0.1rem 0.4rem;
  margin: 0 0.05rem;
  border-radius: 4px;
  border: 1px solid #4b5563;
  background: #020617;
  color: var(--text-main);
  font-family: "JetBrains Mono", Menlo, Consolas, monospace;
  font-size: 0.8em;
}

/* Code / pre */

.manual-content pre {
  background: #020617;
  color: #e5e7eb;
  border-radius: 0.4rem;
  border: 1px solid #111827;
  padding: 0.5rem 0.75rem;
  overflow-x: auto;
  font-size: 0.85rem;
}

.manual-content code {
  font-family: "JetBrains Mono", Menlo, Consolas, monospace;
}

/* Figures */

.figure-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  margin: 0.75rem 0;
}

.figure-inline img {
  height: 28px;
  width: auto;
}

.figure-inline figcaption {
  width: 100%;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

/* Callouts */

.callout {
  border-radius: 0.6rem;
  padding: 0.65rem 0.85rem;
  font-size: 0.9rem;
  margin: 0.7rem 0;
  border-left: 3px solid #6b7280;
  background: #020617;
}

.callout-tip {
  border-left-color: var(--brand-blue);
  background: rgba(0, 191, 255, 0.12);
}

/* ======== LASER SAFETY CALLOUTS ======== */

.callout-warning {
  border-left-color: var(--brand-orange);
  background: rgba(247, 147, 30, 0.10);
}

.laser-safety {
  margin-top: 0.9rem;
}

.laser-safety h3 {
  margin-top: 0;
  margin-bottom: 0.35rem;
  font-size: 0.98rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #fed7aa;
}

.laser-safety ul {
  margin: 0.25rem 0 0.1rem;
  padding-left: 1.1rem;
}

.laser-safety li + li {
  margin-top: 0.1rem;
}

/* ========= RESPONSIVE ========= */

@media (max-width: 900px) {
  .manual-layout {
    grid-template-columns: 1fr;
    padding: 0 1rem;
  }

  .manual-nav {
    position: static;
    order: -1;
    margin-bottom: 0.5rem;
  }
}

@media (max-width: 600px) {
  .site-header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .manual-content {
    padding: 1.25rem;
  }

  .site-logo {
    height: 48px;
  }
}
.figure-large {
  margin: 1.25rem 0;
  text-align: center;
}

.figure-large img {
  max-width: 100%;
  height: auto;
  border-radius: 0.6rem;
  border: 1px solid #2a3d4c;
  box-shadow: 0 8px 30px rgba(0,0,0,0.45);
}

.figure-large figcaption {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}