:root {
  color-scheme: dark;
  --bg: #07070d;
  --panel: rgba(10, 13, 26, 0.88);
  --panel-strong: rgba(16, 19, 36, 0.96);
  --line: rgba(80, 255, 229, 0.28);
  --line-hot: rgba(255, 46, 214, 0.5);
  --text: #eefcff;
  --muted: #91a5b7;
  --cyan: #46fff0;
  --green: #7cff6b;
  --magenta: #ff39d4;
  --yellow: #ffe66d;
  --shadow: rgba(70, 255, 240, 0.22);
  --mono: "SFMono-Regular", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: var(--sans);
  letter-spacing: 0;
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

.backdrop {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  background:
    radial-gradient(circle at 14% 18%, rgba(255, 57, 212, 0.16), transparent 22rem),
    radial-gradient(circle at 84% 10%, rgba(70, 255, 240, 0.14), transparent 24rem),
    linear-gradient(135deg, #07070d 0%, #10111f 43%, #05060b 100%);
}

.grid {
  position: absolute;
  inset: -10% -5%;
  background-image:
    linear-gradient(rgba(70, 255, 240, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 57, 212, 0.13) 1px, transparent 1px);
  background-size: 56px 56px;
  transform: perspective(900px) rotateX(62deg) translateY(22%);
  transform-origin: bottom;
}

.scanlines {
  position: absolute;
  inset: 0;
  opacity: 0.28;
  background: repeating-linear-gradient(180deg, transparent 0 3px, rgba(255, 255, 255, 0.06) 4px);
  pointer-events: none;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 96px;
  padding: 20px clamp(16px, 4vw, 44px);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(7, 7, 13, 0.95), rgba(16, 19, 36, 0.82));
  box-shadow: 0 16px 60px rgba(0, 0, 0, 0.28);
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  flex: 0 0 auto;
  border: 1px solid var(--cyan);
  background: linear-gradient(135deg, rgba(70, 255, 240, 0.22), rgba(255, 57, 212, 0.12));
  color: var(--green);
  font-family: var(--mono);
  font-weight: 800;
  text-shadow: 0 0 14px var(--green);
  box-shadow: 0 0 28px var(--shadow), inset 0 0 20px rgba(70, 255, 240, 0.1);
}

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

h1 {
  font-size: clamp(1.5rem, 4vw, 2.65rem);
  line-height: 0.98;
  color: var(--cyan);
  text-transform: uppercase;
  text-shadow: 0 0 22px rgba(70, 255, 240, 0.42);
}

.brand p {
  margin-top: 6px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.86rem;
}

.status-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--yellow);
}

.status-strip span {
  border: 1px solid rgba(255, 230, 109, 0.36);
  padding: 8px 10px;
  background: rgba(255, 230, 109, 0.08);
}

.shell {
  display: grid;
  grid-template-columns: minmax(260px, 330px) minmax(0, 1fr);
  gap: 20px;
  width: min(1500px, 100%);
  margin: 0 auto;
  padding: 22px clamp(14px, 3vw, 32px) 36px;
}

.sidebar {
  position: sticky;
  top: 18px;
  align-self: start;
  display: grid;
  gap: 14px;
  max-height: calc(100vh - 36px);
}

.panel,
.workspace {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: 0 0 28px rgba(70, 255, 240, 0.08), inset 0 0 0 1px rgba(255, 57, 212, 0.08);
  backdrop-filter: blur(12px);
}

.panel {
  padding: 14px;
}

.search-panel label,
.panel-title,
.eyebrow {
  color: var(--green);
  font-family: var(--mono);
  font-size: 0.76rem;
  text-transform: uppercase;
}

.search-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 42px;
  gap: 8px;
  margin-top: 10px;
}

input[type="search"] {
  width: 100%;
  min-width: 0;
  border: 1px solid rgba(70, 255, 240, 0.38);
  border-radius: 0;
  padding: 11px 12px;
  background: rgba(0, 0, 0, 0.36);
  color: var(--text);
  outline: none;
}

input[type="search"]:focus {
  border-color: var(--magenta);
  box-shadow: 0 0 0 3px rgba(255, 57, 212, 0.16);
}

#clearSearch,
.view-actions button,
.copy-button,
.deck-button {
  border: 1px solid rgba(70, 255, 240, 0.42);
  background: rgba(70, 255, 240, 0.08);
  cursor: pointer;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease, box-shadow 140ms ease;
}

#clearSearch:hover,
.view-actions button:hover,
.copy-button:hover,
.deck-button:hover {
  transform: translateY(-1px);
  border-color: var(--magenta);
  background: rgba(255, 57, 212, 0.1);
  box-shadow: 0 0 18px rgba(255, 57, 212, 0.18);
}

#clearSearch {
  color: var(--magenta);
  font-size: 1.35rem;
}

.deck-switcher {
  display: grid;
  gap: 10px;
}

.deck-button {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 58px;
  padding: 10px;
  text-align: left;
}

.deck-button.is-active {
  border-color: var(--green);
  background: linear-gradient(90deg, rgba(124, 255, 107, 0.16), rgba(70, 255, 240, 0.08));
  box-shadow: 0 0 24px rgba(124, 255, 107, 0.13);
}

.deck-icon {
  display: grid;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(255, 230, 109, 0.45);
  color: var(--yellow);
  font-family: var(--mono);
}

.deck-name {
  overflow: hidden;
  color: var(--text);
  font-weight: 750;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.deck-meta {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.toc-panel {
  overflow: hidden;
}

#toc {
  display: grid;
  gap: 6px;
  max-height: calc(100vh - 390px);
  margin-top: 10px;
  overflow: auto;
  padding-right: 4px;
}

.toc-link {
  display: block;
  border-left: 2px solid rgba(70, 255, 240, 0.22);
  color: var(--muted);
  padding: 8px 9px;
  text-decoration: none;
  font-size: 0.87rem;
}

.toc-link:hover,
.toc-link.is-active {
  border-left-color: var(--magenta);
  color: var(--cyan);
  background: rgba(70, 255, 240, 0.07);
}

.workspace {
  min-width: 0;
  min-height: calc(100vh - 154px);
}

.workspace-head {
  position: sticky;
  top: 0;
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px clamp(16px, 3vw, 28px);
  border-bottom: 1px solid var(--line);
  background: rgba(7, 7, 13, 0.92);
  backdrop-filter: blur(16px);
}

.workspace-head h2 {
  margin-top: 4px;
  color: var(--cyan);
  font-size: clamp(1.3rem, 3vw, 2.2rem);
  line-height: 1;
}

.view-actions {
  display: flex;
  gap: 8px;
}

.view-actions button {
  min-width: 84px;
  padding: 10px 12px;
  color: var(--green);
  font-family: var(--mono);
}

.content {
  display: grid;
  gap: 14px;
  padding: 18px clamp(14px, 2.5vw, 28px) 28px;
}

.section-card {
  border: 1px solid rgba(70, 255, 240, 0.24);
  background: rgba(4, 6, 12, 0.74);
}

.section-card[open] {
  border-color: rgba(124, 255, 107, 0.42);
}

.section-card summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 58px;
  padding: 14px 16px;
  color: var(--green);
  font-family: var(--mono);
  cursor: pointer;
  list-style: none;
}

.section-card summary::-webkit-details-marker {
  display: none;
}

.section-card summary::after {
  content: "+";
  color: var(--magenta);
  font-size: 1.2rem;
}

.section-card[open] summary::after {
  content: "-";
}

.section-body {
  padding: 2px 16px 18px;
}

.markdown h1 {
  font-size: 1.85rem;
}

.markdown h2 {
  color: var(--green);
  font-family: var(--mono);
  font-size: 1.04rem;
}

.markdown h3 {
  margin-top: 20px;
  color: var(--cyan);
  font-size: 1.05rem;
}

.markdown h4 {
  margin-top: 18px;
  color: var(--yellow);
  font-size: 0.96rem;
}

.markdown p,
.markdown li,
.markdown blockquote {
  color: #d6e9ef;
  line-height: 1.62;
}

.markdown p {
  margin-top: 12px;
}

.markdown ul,
.markdown ol {
  margin: 12px 0 0;
  padding-left: 22px;
}

.markdown blockquote {
  margin: 14px 0;
  border-left: 3px solid var(--magenta);
  padding: 9px 12px;
  background: rgba(255, 57, 212, 0.08);
  color: var(--muted);
}

.markdown hr {
  border: 0;
  border-top: 1px solid rgba(70, 255, 240, 0.22);
  margin: 18px 0;
}

.code-frame {
  position: relative;
  margin-top: 14px;
  border: 1px solid rgba(70, 255, 240, 0.32);
  background: #020407;
}

.copy-button {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 1;
  padding: 6px 9px;
  color: var(--yellow);
  font-family: var(--mono);
  font-size: 0.72rem;
}

pre {
  margin: 0;
  overflow: auto;
  padding: 42px 14px 14px;
  color: #b5ffc2;
  font-family: var(--mono);
  font-size: 0.9rem;
  line-height: 1.55;
  text-shadow: 0 0 12px rgba(124, 255, 107, 0.18);
}

code {
  font-family: var(--mono);
}

:not(pre) > code {
  border: 1px solid rgba(255, 230, 109, 0.25);
  padding: 1px 5px;
  background: rgba(255, 230, 109, 0.1);
  color: var(--yellow);
}

mark {
  background: rgba(255, 230, 109, 0.28);
  color: var(--text);
}

.empty-state {
  margin: 28px;
  border: 1px solid var(--line-hot);
  padding: 28px;
  background: rgba(255, 57, 212, 0.08);
  text-align: center;
}

.empty-state span {
  color: var(--magenta);
  font-family: var(--mono);
  font-size: 1.2rem;
}

.empty-state p {
  margin-top: 8px;
  color: var(--muted);
}

@media (max-width: 940px) {
  .topbar,
  .workspace-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .status-strip {
    justify-content: flex-start;
  }

  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    max-height: none;
  }

  #toc {
    max-height: 250px;
  }
}

@media (max-width: 560px) {
  .topbar {
    min-height: auto;
  }

  .brand {
    align-items: flex-start;
  }

  .brand-mark {
    width: 46px;
    height: 46px;
  }

  .deck-button {
    grid-template-columns: 30px minmax(0, 1fr);
  }

  .deck-meta {
    grid-column: 2;
  }

  .view-actions {
    width: 100%;
  }

  .view-actions button {
    flex: 1;
  }

  pre {
    font-size: 0.8rem;
  }
}