/* ── Variable aliases (OpenOCD uses --green/--blue; map to site vars) ── */
:root {
  --green:     #00e5a0;
  --green-dim: #00a870;
  --amber:     #f5a623;
  --amber-dim: #c07a10;
  --blue:      #4db8ff;
  --blue-dim:  #1a7abf;
  --red:       #ff5555;
  --purple:    #b48eff;
  --bg2:       #0e1117;
  --bg3:       #131820;
  --panel:     #161c26;
  --border2:   #243040;
  --text-mid:  #8899aa;
  --glow-g:    0 0 24px rgba(0,229,160,0.2);
  --glow-a:    0 0 24px rgba(245,166,35,0.2);
  --glow-b:    0 0 24px rgba(77,184,255,0.15);
}


/* ── Layout offsets: cb-nav (60px) + search bar (~55px) ── */
.sidenav {
  position: fixed;
  left: 0;
  top: 115px;
  width: 240px;
  height: calc(100vh - 115px);
  background: var(--bg2);
  border-right: 1px solid var(--border);
  padding: 24px 0;
  overflow-y: auto;
  z-index: 50;
  display: flex;
  flex-direction: column;
}
.main {
  margin-left: 240px;
  padding-top: 130px;
  min-height: 100vh;
}

/* CodeBobby — css/openocd.css — OpenOCD Tutorial page styles */


/* ── CodeBobby Top Nav (OpenOCD page) ── */
.cb-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 60px;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  background: rgba(10,12,15,0.97);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  gap: 1.5rem;
  flex-wrap: wrap;
}



/* ── Sidenav offset below nav+search ── */


/* ── Main content offset ── */
.main {
  padding-top: 130px !important;
}


body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ─── SCANLINE OVERLAY ─── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.07) 2px,
    rgba(0,0,0,0.07) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* ─── CODEBOBBY TOP NAV ─── */
.cb-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 60px;
  background: rgba(10,12,15,0.95);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  gap: 1.5rem;
}
.cb-nav-logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.1rem;
  color: var(--green);
  text-decoration: none;
  letter-spacing: 0.06em;
  flex-shrink: 0;
}
.cb-nav-logo span { color: var(--blue); }
.cb-nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}
.cb-nav-links a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-dim);
  text-decoration: none;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color 0.2s;
}
.cb-nav-links a:hover { color: var(--green); }
.cb-nav-cta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--bg);
  background: var(--green);
  border: none;
  padding: 0.5rem 1.1rem;
  cursor: pointer;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  clip-path: polygon(0 0,calc(100% - 7px) 0,100% 7px,100% 100%,7px 100%,0 calc(100% - 7px));
  transition: background 0.2s;
  flex-shrink: 0;
}
.cb-nav-cta:hover { background: var(--blue); }

/* ─── SIDE NAV ─── */

.sidenav::-webkit-scrollbar { width: 4px; }
.sidenav::-webkit-scrollbar-track { background: transparent; }
.sidenav::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }

.sidenav-logo {
  padding: 0 20px 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}
.sidenav-logo .logo-chip {
  display: inline-block;
  background: var(--green);
  color: #000;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border-radius: 3px;
  margin-bottom: 8px;
}
.sidenav-logo h2 {
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

.nav-section-label {
  padding: 8px 20px 4px;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  text-transform: uppercase;
  font-family: 'JetBrains Mono', monospace;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  font-size: 12px;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s;
  border-left: 2px solid transparent;
  text-decoration: none;
}
.nav-item:hover { color: var(--text); background: rgba(255,255,255,0.03); }
.nav-item.active { color: var(--green); border-left-color: var(--green); background: rgba(0,229,160,0.05); }
.nav-item .nav-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: inherit;
  opacity: 0.6;
  min-width: 20px;
}

.progress-bar-wrap {
  margin: auto 20px 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  margin-bottom: 6px;
}
.progress-track {
  height: 4px;
  background: var(--border2);
  border-radius: 2px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--green), var(--blue));
  border-radius: 2px;
  transition: width 0.5s ease;
  width: 0%;
}

/* ─── MAIN CONTENT ─── */
.main {
  margin-left: 240px;
  padding-top: 125px;
  min-height: 100vh;
}

/* ─── HERO ─── */
.hero {
  position: relative;
  padding: 80px 60px 60px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  background: radial-gradient(ellipse 60% 80% at 80% 50%, rgba(0,229,160,0.04) 0%, transparent 70%),
              radial-gradient(ellipse 40% 60% at 20% 80%, rgba(77,184,255,0.04) 0%, transparent 60%);
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.3;
}
.hero-content { position: relative; z-index: 1; max-width: 720px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,229,160,0.08);
  border: 1px solid rgba(0,229,160,0.25);
  border-radius: 4px;
  padding: 6px 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--green);
  letter-spacing: 0.05em;
  margin-bottom: 28px;
}
.hero-badge .dot {
  width: 6px; height: 6px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0,229,160,0.5); }
  50% { opacity: 0.7; box-shadow: 0 0 0 5px rgba(0,229,160,0); }
}

.hero h1 {
  font-family: 'Syne', sans-serif;
  font-size: 48px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 16px;
  color: #fff;
  letter-spacing: -0.02em;
}
.hero h1 span { color: var(--green); }

.hero-sub {
  font-size: 16px;
  color: var(--text-mid);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 40px; }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--panel);
  border: 1px solid var(--border2);
  border-radius: 3px;
  padding: 5px 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-mid);
}
.tag.green { color: var(--green); border-color: rgba(0,229,160,0.2); background: rgba(0,229,160,0.05); }
.tag.amber { color: var(--amber); border-color: rgba(245,166,35,0.2); background: rgba(245,166,35,0.05); }
.tag.blue  { color: var(--blue);  border-color: rgba(77,184,255,0.2); background: rgba(77,184,255,0.05); }

.hero-stats {
  display: flex;
  gap: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.stat { display: flex; flex-direction: column; gap: 2px; }
.stat-val {
  font-family: 'Syne', sans-serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--green);
}
.stat-lbl { font-size: 11px; color: var(--text-dim); }

/* ─── SECTIONS ─── */
.content { padding: 0 60px 80px; }

.module {
  margin-top: 64px;
  scroll-margin-top: 40px;
}

.module-header {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.module-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  color: var(--green);
  background: rgba(0,229,160,0.08);
  border: 1px solid rgba(0,229,160,0.2);
  border-radius: 4px;
  padding: 4px 10px;
  margin-top: 4px;
  white-space: nowrap;
}
.module-title-wrap h2 {
  font-family: 'Syne', sans-serif;
  font-size: 26px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}
.module-title-wrap p {
  font-size: 14px;
  color: var(--text-mid);
}

/* ─── CARDS ─── */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.card-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.card:hover { border-color: var(--border2); box-shadow: 0 4px 24px rgba(0,0,0,0.3); }
.card.green:hover { border-color: rgba(0,229,160,0.3); box-shadow: var(--glow-g); }
.card.amber:hover { border-color: rgba(245,166,35,0.3); box-shadow: var(--glow-a); }
.card.blue:hover  { border-color: rgba(77,184,255,0.3); box-shadow: var(--glow-b); }

.card-icon { font-size: 22px; margin-bottom: 12px; }
.card h3 { font-size: 14px; font-weight: 600; color: #fff; margin-bottom: 6px; }
.card p  { font-size: 13px; color: var(--text-mid); line-height: 1.6; }

/* ─── CODE BLOCKS ─── */
.code-block {
  background: #080b10;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin: 20px 0;
  font-family: 'JetBrains Mono', monospace;
}
.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--bg3);
  border-bottom: 1px solid var(--border);
}
.code-header .dots { display: flex; gap: 6px; }
.code-header .dot { width: 10px; height: 10px; border-radius: 50%; }
.code-header .dot.r { background: #ff5f57; }
.code-header .dot.y { background: #febc2e; }
.code-header .dot.g { background: #28c840; }
.code-lang {
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.copy-btn {
  background: none;
  border: 1px solid var(--border2);
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  padding: 3px 10px;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s;
}
.copy-btn:hover { color: var(--green); border-color: var(--green); }

.code-body {
  padding: 20px;
  overflow-x: auto;
  font-size: 12.5px;
  line-height: 1.8;
}
.code-body::-webkit-scrollbar { height: 4px; }
.code-body::-webkit-scrollbar-track { background: transparent; }
.code-body::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }

.code-body code { display: block; white-space: pre; }

.c-comment { color: #3a5060; }
.c-green  { color: var(--green); }
.c-amber  { color: var(--amber); }
.c-blue   { color: var(--blue); }
.c-purple { color: var(--purple); }
.c-red    { color: var(--red); }
.c-white  { color: #e8f0f8; }
.c-dim    { color: var(--text-mid); }

/* ─── STEP LIST ─── */
.steps { display: flex; flex-direction: column; gap: 0; }
.step {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.step:last-child { border-bottom: none; }
.step-num-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
}
.step-num {
  width: 32px; height: 32px;
  background: var(--panel);
  border: 1px solid var(--border2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--green);
  flex-shrink: 0;
}
.step-line {
  width: 1px;
  flex: 1;
  background: var(--border);
  margin-top: 8px;
}
.step-content { flex: 1; padding-bottom: 8px; }
.step-content h4 { font-size: 14px; font-weight: 600; color: #fff; margin-bottom: 6px; padding-top: 4px; }
.step-content p  { font-size: 13px; color: var(--text-mid); line-height: 1.6; }

/* ─── CALLOUTS ─── */
.callout {
  display: flex;
  gap: 14px;
  padding: 16px 18px;
  border-radius: 6px;
  margin: 16px 0;
  border-left: 3px solid;
  font-size: 13px;
  line-height: 1.6;
}
.callout.tip    { background: rgba(0,229,160,0.06); border-color: var(--green); color: var(--text-mid); }
.callout.warn   { background: rgba(245,166,35,0.07); border-color: var(--amber); color: var(--text-mid); }
.callout.danger { background: rgba(255,85,85,0.07); border-color: var(--red); color: var(--text-mid); }
.callout.info   { background: rgba(77,184,255,0.06); border-color: var(--blue); color: var(--text-mid); }
.callout-icon { font-size: 16px; flex-shrink: 0; margin-top: 1px; }
.callout strong { color: #fff; }

/* ─── TABLE ─── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  font-family: 'JetBrains Mono', monospace;
  margin: 16px 0;
}
.data-table th {
  padding: 10px 14px;
  background: var(--bg3);
  color: var(--text-dim);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-weight: 500;
}
.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-mid);
}
.data-table tr:hover td { background: rgba(255,255,255,0.02); }
.data-table td:first-child { color: var(--green); }
.data-table .addr { color: var(--amber); }

/* ─── INTERACTIVE QUIZ ─── */
.quiz {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin: 24px 0;
}
.quiz-q { font-size: 14px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.quiz-q span { color: var(--green); font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 400; margin-left: 8px; }
.quiz-opts { display: flex; flex-direction: column; gap: 8px; }
.quiz-opt {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
  font-size: 13px;
  color: var(--text-mid);
  user-select: none;
}
.quiz-opt:hover { border-color: var(--border2); color: var(--text); }
.quiz-opt.correct { border-color: var(--green); background: rgba(0,229,160,0.08); color: var(--green); }
.quiz-opt.wrong   { border-color: var(--red);   background: rgba(255,85,85,0.06); color: var(--red); }
.quiz-opt .opt-key {
  width: 22px; height: 22px;
  background: var(--border2);
  border-radius: 3px;
  display: flex; align-items: center; justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  font-weight: 600;
  color: var(--text-dim);
  flex-shrink: 0;
}
.quiz-opt.correct .opt-key { background: var(--green); color: #000; }
.quiz-opt.wrong   .opt-key { background: var(--red);   color: #fff; }
.quiz-result {
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: 5px;
  font-size: 13px;
  display: none;
}
.quiz-result.show { display: block; }
.quiz-result.ok { background: rgba(0,229,160,0.08); color: var(--green); }
.quiz-result.bad { background: rgba(255,85,85,0.08); color: var(--red); }

/* ─── COMMAND REFERENCE ─── */
.cmd-grid { display: flex; flex-direction: column; gap: 2px; }
.cmd-row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 16px;
  padding: 10px 14px;
  border-radius: 5px;
  transition: background 0.1s;
  align-items: start;
}
.cmd-row:hover { background: rgba(255,255,255,0.03); }
.cmd-row code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--amber);
  word-break: break-all;
}
.cmd-row span { font-size: 13px; color: var(--text-mid); }

/* ─── MEMORY MAP ─── */
.mem-map { display: flex; flex-direction: column; gap: 2px; }
.mem-row {
  display: grid;
  grid-template-columns: 180px 70px 1fr;
  gap: 12px;
  padding: 9px 14px;
  border-radius: 4px;
  align-items: center;
  border-left: 3px solid transparent;
  transition: all 0.1s;
}
.mem-row:hover { background: rgba(255,255,255,0.02); }
.mem-row.flash  { border-color: var(--green); }
.mem-row.sram   { border-color: var(--blue); }
.mem-row.periph { border-color: var(--amber); }
.mem-row.arm    { border-color: var(--purple); }
.mem-row.otp    { border-color: var(--text-dim); }
.mem-addr { font-family: 'JetBrains Mono', monospace; font-size: 11px; }
.mem-row.flash  .mem-addr { color: var(--green); }
.mem-row.sram   .mem-addr { color: var(--blue); }
.mem-row.periph .mem-addr { color: var(--amber); }
.mem-row.arm    .mem-addr { color: var(--purple); }
.mem-row.otp    .mem-addr { color: var(--text-dim); }
.mem-size { font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--text-dim); }
.mem-desc { font-size: 13px; color: var(--text-mid); }

/* ─── DIVIDER ─── */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}

/* ─── SECTION LABEL ─── */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 16px;
}
.section-label::before {
  content: '';
  width: 20px; height: 1px;
  background: var(--border2);
}

/* ─── CHIP TABLE ─── */
.chip-table { border-collapse: collapse; width: 100%; font-size: 13px; }
.chip-table th {
  padding: 10px 14px;
  background: var(--bg3);
  color: var(--text-dim);
  font-size: 10px;
  font-family: 'JetBrains Mono', monospace;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-weight: 500;
}
.chip-table td {
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-mid);
}
.chip-table td:first-child {
  color: var(--blue);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
}
.chip-table tr:hover td { background: rgba(255,255,255,0.02); }

/* ─── PROGRESS TRACKER ─── */
.module-done-wrap { display: flex; justify-content: flex-end; margin-top: 24px; }
.done-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,229,160,0.08);
  border: 1px solid rgba(0,229,160,0.25);
  color: var(--green);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  padding: 8px 18px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
}
.done-btn:hover { background: rgba(0,229,160,0.15); }
.done-btn.done { background: rgba(0,229,160,0.2); border-color: var(--green); }

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
  .sidenav { display: none; }
  .main { margin-left: 0; }
  .hero { padding: 48px 24px 40px; }
  .content { padding: 0 24px 60px; }
  .hero h1 { font-size: 32px; }
  .card-grid-2 { grid-template-columns: 1fr; }
  .cmd-row { grid-template-columns: 1fr; }
  .mem-row { grid-template-columns: 1fr 50px; }
  .mem-desc { display: none; }
}

/* ─── ANIMATIONS ─── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
.module { animation: fadeUp 0.4s ease both; }

/* tab system */
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); margin-bottom: 0; }
.tab-btn {
  background: none;
  border: none;
  padding: 10px 18px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-dim);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
  margin-bottom: -1px;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--green); border-bottom-color: var(--green); }
.tab-panels { background: #080b10; border: 1px solid var(--border); border-top: none; border-radius: 0 0 8px 8px; }
.tab-panel { display: none; padding: 20px; }
.tab-panel.active { display: block; }
.tab-panel code { font-family: 'JetBrains Mono', monospace; font-size: 12.5px; line-height: 1.8; display: block; white-space: pre; overflow-x: auto; }