/* =========================================================
   Tio Pez University — site stylesheet
   Design tokens: dark technical theme, rocketry/electronics accents
   ========================================================= */

/* *******************************
These are James' style additions
********************************** */   

li {
  margin: 10px 0;
}

/* *******************************
Below are AI generated styles
********************************** */   

:root {
  /* Color */
  --bg:            #0b0f14;
  --bg-elevated:   #121821;
  --bg-panel:      #0e1319;
  --border:        #1f2b38;
  --text:          #dbe4ee;
  --text-muted:    #7f92a6;
  --accent-flame:  #ff7a45;  /* rocketry */
  --accent-trace:  #39d9c4;  /* electronics / circuit trace */
  --accent-amber:  #e8b339;  /* CRT amber, used sparingly */

  /* Type */
  --font-display: 'JetBrains Mono', 'Courier New', monospace;
  --font-body:    'IBM Plex Sans', -apple-system, sans-serif;

  /* Layout */
  --sidebar-w: 280px;
  --header-h: 60px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

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

/* ---------- Header ---------- */

#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 100;
}

#site-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.5px;
  color: var(--text);
  white-space: nowrap;
}

#site-title .cursor {
  display: inline-block;
  width: 8px;
  color: var(--accent-flame);
  animation: blink 1.1s steps(1) infinite;
}

@keyframes blink { 50% { opacity: 0; } }

#nav-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.2rem;
  padding: 6px 12px;
  cursor: pointer;
  border-radius: 3px;
}
#nav-toggle:hover { border-color: var(--accent-trace); color: var(--accent-trace); }

@media (min-width: 900px) {
  #nav-toggle { display: none; }
}

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

#site-nav {
  position: fixed;
  top: var(--header-h);
  bottom: 0;
  left: 0;
  width: var(--sidebar-w);
  background: var(--bg-elevated);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform 0.25s ease;
  z-index: 90;
  padding: 12px 0 40px;
}

#site-nav.open { transform: translateX(0); }

@media (min-width: 900px) {
  #site-nav { transform: translateX(0); }
}

.nav-section {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
}

.nav-section > a {
  display: block;
  flex: 1 1 auto;
  order: 1;
  padding: 10px 18px;
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.3px;
  color: var(--text);
  border-left: 3px solid transparent;
}

.nav-section > a:hover,
.nav-section.active > a {
  background: var(--bg-panel);
  border-left-color: var(--accent-flame);
  color: var(--accent-flame);
  text-decoration: none;
}

.nav-subitems {
  list-style: none;
  margin: 0;
  padding: 0 0 8px 30px;
  display: none;
  order: 3;
  flex-basis: 100%;
  width: 100%;
}

.nav-section.expanded .nav-subitems { display: block; }

.nav-subitems li {
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 3px 0;
}
.nav-subitems li a {
  display: block;
  color: var(--text-muted);
}
.nav-subitems li a:hover {
  color: var(--accent-trace);
  text-decoration: none;
}

.nav-expand-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 0.75rem;
  order: 2;
  flex: 0 0 auto;
  align-self: center;
  padding: 10px 18px;
}
.nav-expand-btn:hover { color: var(--accent-trace); }

/* ---------- Overlay (mobile) ---------- */

#nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 80;
}
#nav-overlay.show { display: block; }
@media (min-width: 900px) { #nav-overlay { display: none !important; } }

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

#site-main {
  margin-top: var(--header-h);
  padding: 32px 20px 80px;
}

@media (min-width: 900px) {
  #site-main { margin-left: var(--sidebar-w); padding: 40px 48px 100px; }
}

.panel { display: none; max-width: 860px; }
.panel.active { display: block; }

.panel h1 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--accent-flame);
  margin-bottom: 4px;
}

.panel .eyebrow {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* 
    Category Formatting
*/ 
.category-label {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--accent-flame);
  margin: 28px 0 4px;
  letter-spacing: 0.3px;
}

/* 
    Section Formatting
*/ 
.section-label {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--accent-flame);
  margin: 28px 0 4px;
  letter-spacing: 0.3px;
}

.page-section-heading {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--accent-flame);
  margin: 28px 0 4px;
  letter-spacing: 0.3px;
}

.card-section-heading {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--accent-trace);
  margin: 28px 0 4px;
  letter-spacing: 0.3px;
}
.card-section-heading:first-of-type {
  margin-top: 12px;
}

/*
    Breadcrumbs
*/

.breadcrumb a {
  color: var(--text-muted);
}
.breadcrumb a:hover {
  color: var(--accent-trace);
  text-decoration: none;
}
.breadcrumb .crumb-sep {
  color: var(--border);
  margin: 0 2px;
}
.breadcrumb .crumb-current {
  color: var(--text-muted);
}

.trace-divider {
  border: none;
  height: 1px;
  background: repeating-linear-gradient(
    90deg,
    var(--accent-trace) 0px, var(--accent-trace) 6px,
    transparent 6px, transparent 12px
  );
  opacity: 0.5;
  margin: 20px 0 28px;
}

/* Topic cards for section sub-items */

.topic-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 20px;
}
@media (min-width: 640px) {
  .topic-grid { grid-template-columns: 1fr 1fr; }
}

.topic-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-trace);
  border-radius: 4px;
  padding: 16px 18px;
}

.topic-card h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--text);
}

.topic-card p {
  margin: 0 0 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.topic-card p:last-child {
  margin-bottom: 0;
}

.topic-thumb {
  display: block;
  width: auto;
  max-width: 100%;
  height: 200px;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: 3px;
  margin: 0 auto 10px;
}

.topic-card .status {
  display: inline-block;
  margin-top: 8px;
  font-family: var(--font-display);
  font-size: 0.7rem;
  color: var(--accent-amber);
  letter-spacing: 0.5px;
}

.card-subitem {
  padding-top: 10px;
  margin-top: 10px;
  border-top: 1px dashed var(--border);
}
.card-subitem:first-of-type {
  padding-top: 0;
  margin-top: 10px;
  border-top: none;
}
.card-subitem h4 {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--accent-trace);
}

/* Hero / welcome */

.hero-boot {
  font-family: var(--font-display);
  color: var(--accent-trace);
  font-size: 0.85rem;
  margin-bottom: 18px;
}

.welcome-quote {
  margin: 24px 0 0;
  padding: 14px 20px;
  border-left: 3px solid var(--accent-trace);
  background: var(--bg-panel);
  color: var(--text);
  font-style: italic;
  font-size: 1rem;
}

.welcome-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.welcome-logo {
  width: 70px;
  height: 70px;
  flex-shrink: 0;
  opacity: 0.92;
}
@media (min-width: 640px) {
  .welcome-logo { width: 84px; height: 84px; }
}

/* Bio job list */

.job-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}
.job-list li {
  border-left: 2px solid var(--border);
  padding: 4px 0 16px 16px;
  margin-left: 4px;
  position: relative;
}
.job-list li::before {
  content: '';
  position: absolute;
  left: -5px;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--accent-flame);
  border-radius: 50%;
}
.job-list .job-title {
  font-family: var(--font-display);
  color: var(--text);
  font-size: 0.9rem;
}
.job-list .job-desc {
  color: var(--text-muted);
  font-size: 0.85rem;
}

footer#site-footer {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  padding-top: 16px;
  margin-top: 40px;
}

/* ---------- Standalone content pages (self-contained, no server required) ---------- */

.content-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  height: var(--header-h);
}

.content-header-back {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--accent-trace);
  white-space: nowrap;
}
.content-header-back:hover { text-decoration: underline; }

.content-header-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  white-space: nowrap;
}

.content-main {
  padding: 32px 20px 80px;
}
@media (min-width: 900px) {
  .content-main { padding: 40px 48px 100px; }
}

.content-page {
  max-width: 720px;
}

.content-page h1 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--accent-flame);
  margin-bottom: 4px;
}

.content-page .eyebrow {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.content-page p {
  color: var(--text);
  font-size: 1rem;
  line-height: 1.7;
}

.content-page img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 4px;
}

/* ---------- Contact form ---------- */

.contact-form {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: 480px;
}

.contact-form label {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 12px;
}

.contact-form input,
.contact-form textarea {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 10px 12px;
  resize: vertical;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent-trace);
}

.contact-form button {
  margin-top: 20px;
  align-self: flex-start;
  background: var(--accent-flame);
  border: none;
  border-radius: 4px;
  color: var(--bg);
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.3px;
  padding: 10px 22px;
  cursor: pointer;
}
.contact-form button:hover { opacity: 0.9; }

/* Honeypot field: visually hidden, still present/tabbable-avoided for bots */
.hp-field {
  position: absolute;
  left: -9999px;
  top: -9999px;
}

footer#site-footer a {
  color: var(--text-muted);
}
footer#site-footer a:hover { color: var(--accent-trace); }

/* ---------- Data tables (timeline, propulsion, any future table) ---------- */

.table-wrap {
  overflow-x: auto;
  margin: 12px 0 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  white-space: nowrap;
}

table.data-table th,
table.data-table td {
  padding: 9px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
}

table.data-table th {
  background: var(--bg-elevated);
  font-family: var(--font-display);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--accent-trace);
  white-space: nowrap;
}

table.data-table td {
  color: var(--text);
}

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

table.data-table tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.02);
}

@media (max-width: 640px) {
  table.data-table {
    white-space: normal;
    font-size: 0.82rem;
  }
  table.data-table th,
  table.data-table td {
    padding: 7px 10px;
  }
}

/* ---------- Stats (VRC rocket cards, datasheets, badge specs) ---------- */

.summary-stats {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 8px 0;
  font-size: 0.85rem;
}
.summary-stats > div {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.stat-label {
  font-family: var(--font-display);
  font-size: 0.68rem;
  color: var(--accent-trace);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

/* ---------- Rocket datasheet blocks (VRC detail pages) ---------- */

.datasheet-block {
  margin: 18px 0;
}

/* ---------- Contest / design-target card variant ---------- */

.contest-card {
  border-left-style: dashed;
  border-left-color: var(--accent-flame);
}
.contest-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.62rem;
  color: var(--accent-flame);
  border: 1px solid var(--accent-flame);
  border-radius: 3px;
  padding: 1px 6px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  margin-bottom: 6px;
}

/* ---------- Rule cards (Aerobrakes project rules) ---------- */

.rule-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-trace);
  border-radius: 4px;
  padding: 14px 16px;
  margin: 10px 0;
}
.rule-card.safety {
  border-left-color: var(--accent-flame);
}
.rule-card h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--text);
}
.rule-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ---------- Phase cards (Aerobrakes course phases) ---------- */

.phase-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 14px 16px;
  margin: 10px 0;
}
.phase-card h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--text);
}
.phase-card p {
  margin: 0 0 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.phase-card ul {
  margin: 0;
  padding-left: 20px;
  font-size: 0.88rem;
  color: var(--text-muted);
}
.phase-card li {
  margin-bottom: 4px;
}

/* ---------- Lesson / doc index lists (ARC docs, lesson TOC, handouts index) ---------- */

.lesson-index {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}
.lesson-index li {
  padding: 7px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 0.92rem;
}
.lesson-index li:last-child {
  border-bottom: none;
}

/* ---------- Inline call-to-action link (Rocket Math, Aerobrakes overview) ---------- */

.cta-row {
  margin-top: 20px;
}
.rm-link {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--accent-trace);
}

/* ---------- Card grid variant tweaks ---------- */

.card-grid-badge {
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .card-grid-summary,
  .card-grid-simulator {
    grid-template-columns: 1fr 1fr;
  }
}