:root {
  --bg-0: #ebe6dc;
  --bg-1: #e2dacd;
  --bg-2: #d6cbbb;
  --flare-a: #f8f3ea;
  --flare-b: #cfc2b2;
  --panel: rgba(250, 246, 237, 0.9);
  --panel-soft: rgba(245, 238, 226, 0.88);
  --ink: #2a251d;
  --ink-soft: #3b3429;
  --muted: #6f6557;
  --line: rgba(71, 59, 41, 0.24);
  --brand: #285f52;
  --brand-strong: #1f4d43;
  --accent: #8b5d3a;
  --danger: #b45342;
  --scanline: rgba(32, 22, 14, 0.02);
  --doc-bg: rgba(255, 252, 244, 0.92);
  --inline-code-border: rgba(40, 95, 82, 0.35);
  --inline-code-bg: rgba(40, 95, 82, 0.1);
  --inline-code-ink: #285f52;
  --pre-ink: #22463d;
  --radius: 18px;
  --shadow: 0 20px 50px rgba(58, 46, 30, 0.2);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  color: var(--ink);
  font-family: "JetBrains Mono", "Menlo", "Monaco", monospace;
  background: radial-gradient(circle at 10% 5%, var(--flare-a) 0%, transparent 40%),
    radial-gradient(circle at 100% 100%, var(--flare-b) 0%, transparent 42%),
    linear-gradient(150deg, var(--bg-0), var(--bg-1) 52%, var(--bg-2));
  line-height: 1.5;
  transition: background 220ms ease, color 180ms ease;
}

.ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(var(--scanline) 1px, transparent 1px);
  background-size: 100% 3px;
  opacity: 0.3;
}

.frame {
  position: relative;
  z-index: 1;
  width: min(1100px, 100%);
  margin: 0 auto;
  padding: 18px 14px 32px;
}

.titlebar,
.console,
.status {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.titlebar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  margin-bottom: 14px;
}

.lights {
  display: flex;
  gap: 8px;
}

.light {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.light-close {
  background: var(--danger);
}

.light-min {
  background: var(--accent);
}

.light-max {
  background: var(--brand);
}

.window-title,
.runtime {
  margin: 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.runtime {
  justify-self: end;
}

.console {
  display: grid;
  grid-template-columns: 300px 1fr;
  overflow: hidden;
  min-height: 72vh;
}

.tree-pane {
  padding: 18px 14px;
  border-right: 1px solid var(--line);
  background: var(--panel-soft);
}

.pane-title {
  margin: 0 0 12px;
  color: var(--brand);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.tree {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.tree-item {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 8px 10px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  cursor: pointer;
  transition: border-color 140ms ease, background-color 140ms ease, color 140ms ease;
}

.tree-item:hover,
.tree-item:focus-visible {
  border-color: var(--line);
  color: var(--ink);
  outline: none;
}

.tree-item.active {
  border-color: var(--brand-strong);
  background: rgba(40, 95, 82, 0.14);
  color: var(--ink);
}

.doc-pane {
  padding: 18px;
}

.prompt-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 14px;
  color: var(--brand);
  font-weight: 600;
}

.prompt-user {
  color: var(--brand-strong);
}

.prompt-path {
  color: var(--accent);
}

.typed {
  color: var(--ink);
}

.cursor {
  width: 9px;
  height: 1em;
  background: var(--brand);
  display: inline-block;
  animation: blink 1s step-end infinite;
}

.markdown-body {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--doc-bg);
  padding: 16px;
  min-height: 320px;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3 {
  margin: 0 0 10px;
  font-family: "Sora", "Avenir Next", sans-serif;
  line-height: 1.25;
  color: var(--ink);
}

.markdown-body h1 {
  font-size: clamp(1.35rem, 3vw, 1.9rem);
}

.markdown-body h2 {
  font-size: clamp(1.05rem, 2.2vw, 1.35rem);
  margin-top: 20px;
}

.markdown-body p,
.markdown-body li {
  color: var(--ink-soft);
}

.markdown-body ul {
  margin: 0 0 14px;
  padding-left: 18px;
}

.markdown-body code {
  border: 1px solid var(--inline-code-border);
  border-radius: 8px;
  padding: 1px 6px;
  color: var(--inline-code-ink);
  background: var(--inline-code-bg);
}

.markdown-body pre {
  margin: 12px 0 14px;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(4, 12, 10, 0.9);
  overflow-x: auto;
}

.markdown-body pre code {
  border: 0;
  border-radius: 0;
  padding: 0;
  color: var(--pre-ink);
  background: transparent;
}

.markdown-body a {
  color: var(--brand);
  text-decoration: none;
}

.markdown-body a:hover,
.markdown-body a:focus-visible {
  text-decoration: underline;
}

.status {
  margin-top: 14px;
  padding: 10px 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  font-size: 0.86rem;
}

.status a,
.status span {
  color: var(--muted);
  text-decoration: none;
}

.status a:hover,
.status a:focus-visible {
  color: var(--ink);
}

.reveal {
  opacity: 0;
  transform: translateY(8px);
  animation: enter 450ms ease forwards;
}

.titlebar.reveal {
  animation-delay: 0ms;
}

.console.reveal {
  animation-delay: 110ms;
}

.status.reveal {
  animation-delay: 220ms;
}

@keyframes blink {
  0%,
  49% {
    opacity: 1;
  }
  50%,
  100% {
    opacity: 0;
  }
}

@keyframes enter {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 920px) {
  .titlebar {
    grid-template-columns: auto 1fr;
  }

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

  .tree-pane {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}