:root {
  --ink: var(--platform-text, #141816);
  --muted: var(--platform-text-muted, #3d4740);
  --line: var(--platform-border, #b8c0b4);
  --paper: var(--platform-bg, #e7e9e4);
  --panel: var(--platform-surface, #f7f8f4);
  --panel-muted: var(--platform-surface-muted, #dde1da);
  --accent: var(--platform-accent, #1d4f7a);
  --accent-soft: var(--platform-accent-soft, rgba(29, 79, 122, 0.14));
  --font: var(--platform-font, "Bricolage Grotesque", ui-sans-serif, sans-serif);
  --mono: var(--platform-mono, ui-monospace, monospace);
  --radius: var(--platform-radius, 0.3rem);
  --code-bg: color-mix(in srgb, var(--platform-bg, #e7e9e4) 35%, #0b0f0c);
  --code-fg: var(--platform-text, #e8ebe6);
  --ok: #34d399;
  --err: #fb7185;
  --warn: #fbbf24;
  --info: #38bdf8;
}

:root[data-theme="light"] {
  --code-bg: #f3f4f0;
  --code-fg: #141816;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background-color: var(--paper);
  background-image: var(--platform-hatch, none);
}

.shell {
  width: min(1240px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.25rem 0 3rem;
}

.app-top {
  margin-bottom: 0.85rem;
}

.app-top a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.app-top a:hover {
  text-decoration: underline;
}

.muted {
  color: var(--muted);
}

code {
  font-family: var(--mono);
  font-size: 0.92em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  font: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
}

.btn:hover {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
}

.btn.primary {
  background: var(--accent);
  border-color: transparent;
  color: #fff;
}

.btn.primary:hover {
  background: var(--platform-accent-hover, #163e60);
}

.btn.ghost {
  background: transparent;
}

.btn.ghost:hover {
  background: color-mix(in srgb, var(--accent) 8%, var(--panel));
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0.85rem;
}

.toolbar .spacer {
  flex: 1;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 0.85rem;
}

.hub-card {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1.05rem 1.1rem 1.15rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  border-top: 3px solid var(--card-accent, var(--accent));
  background: var(--panel);
  color: var(--ink);
  text-decoration: none;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.hub-card:hover {
  transform: translateY(-2px);
  border-color: var(--card-accent, var(--accent));
  background: color-mix(in srgb, var(--card-accent, var(--accent)) 8%, var(--panel));
}

.hub-card h2 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--ink);
  font-weight: 700;
}

.hub-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.5;
}

.editor-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 0.85rem;
  min-height: min(70vh, 40rem);
}

.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.panel-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--line);
  background: var(--panel-muted);
}

.panel-head h2 {
  margin: 0;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
  font-weight: 700;
}

.panel-head .spacer {
  flex: 1;
}

.editor-wrap {
  display: grid;
  grid-template-columns: 3rem 1fr;
  flex: 1;
  min-height: 18rem;
  overflow: hidden;
}

.line-numbers {
  margin: 0;
  padding: 1rem 0.55rem 1rem 0;
  overflow: hidden;
  text-align: right;
  font-family: var(--mono);
  font-size: 0.86rem;
  line-height: 1.55;
  color: var(--platform-text-subtle, var(--muted));
  background: var(--panel-muted);
  border-right: 1px solid var(--line);
  user-select: none;
  white-space: pre;
}

#code {
  margin: 0;
  border: 0;
  border-radius: 0;
  resize: none;
  width: 100%;
  height: 100%;
  min-height: 18rem;
  padding: 1rem 1rem 1rem 0.85rem;
  background: var(--code-bg);
  color: var(--code-fg);
  font-family: var(--mono);
  font-size: 0.86rem;
  line-height: 1.55;
  tab-size: 4;
  outline: none;
  white-space: pre;
  overflow: auto;
}

#code:focus {
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 45%, transparent);
}

select.snippet,
.toolbar select {
  max-width: 14rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: var(--ink);
  font: inherit;
  font-size: 0.88rem;
  padding: 0.45rem 0.65rem;
}

.console {
  flex: 1;
  min-height: 12rem;
  margin: 0;
  padding: 0.75rem 0.9rem;
  overflow: auto;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.5;
  background: var(--code-bg);
  color: var(--code-fg);
}

.console-line {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 0.55rem;
  padding: 0.2rem 0;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
  white-space: pre-wrap;
  word-break: break-word;
}

.console-line .kind {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: 0.15rem;
}

.console-line.log .kind {
  color: var(--info);
}
.console-line.warn .kind {
  color: var(--warn);
}
.console-line.error .kind {
  color: var(--err);
}
.console-line.system .kind {
  color: var(--muted);
}

.hint {
  margin: 0 0 0.85rem;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.kbd {
  display: inline-block;
  padding: 0.05rem 0.35rem;
  border: 1px solid var(--line);
  border-radius: 5px;
  font-family: var(--mono);
  font-size: 0.75rem;
  background: var(--panel-muted);
  color: var(--ink);
}

.status {
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

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