:root {
  --ink: var(--platform-text, #e8eaef);
  --muted: var(--platform-text-muted, #94a3b8);
  --line: var(--platform-border, #2a3140);
  --paper: var(--platform-bg, #0b0d12);
  --panel: var(--platform-surface, #161a22);
  --accent: var(--platform-accent, #059669);
  --accent-soft: var(--platform-accent-soft, rgba(5, 150, 105, 0.14));
  --font: "DM Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --radius: 14px;
  --ok: #34d399;
  --err: #fb7185;
  --warn: #fbbf24;
  --info: #38bdf8;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(5, 150, 105, 0.18), transparent 55%),
    radial-gradient(ellipse 40% 35% at 0% 100%, rgba(56, 189, 248, 0.06), transparent 50%),
    linear-gradient(168deg, #0a1210 0%, var(--paper) 50%, #0c1214 100%);
  background-attachment: fixed;
}

.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;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(18, 23, 31, 0.7);
  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, #047857);
}

.btn.ghost {
  background: transparent;
}

.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 rgba(58, 74, 96, 0.85);
  border-top: 3px solid var(--card-accent, var(--accent));
  background: rgba(18, 23, 31, 0.65);
  color: inherit;
  text-decoration: none;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.hub-card:hover {
  transform: translateY(-2px);
  border-color: var(--card-accent, var(--accent));
}

.hub-card h2 {
  margin: 0;
  font-size: 1.1rem;
}

.hub-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.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: rgba(18, 23, 31, 0.78);
  backdrop-filter: blur(8px);
  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: rgba(0, 0, 0, 0.2);
}

.panel-head h2 {
  margin: 0;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  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: color-mix(in srgb, var(--muted) 75%, transparent);
  background: rgba(0, 0, 0, 0.22);
  border-right: 1px solid rgba(42, 49, 64, 0.8);
  user-select: none;
  white-space: pre;
}

#code,
#html-code,
#css-code,
#js-code {
  margin: 0;
  border: 0;
  border-radius: 0;
  resize: none;
  width: 100%;
  height: 100%;
  min-height: 18rem;
  padding: 1rem 1rem 1rem 0.85rem;
  background: #0d1218;
  color: #e2e8f0;
  font-family: var(--mono);
  font-size: 0.86rem;
  line-height: 1.55;
  tab-size: 2;
  outline: none;
  white-space: pre;
  overflow: auto;
}

#code:focus,
#html-code:focus,
#css-code:focus,
#js-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: #0f131a;
  color: var(--ink);
  font: inherit;
  font-size: 0.88rem;
  padding: 0.45rem 0.65rem;
}

.toolbar label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.88rem;
  color: var(--muted);
}

.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: #0a0e14;
}

.console-line {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 0.55rem;
  padding: 0.2rem 0;
  border-bottom: 1px solid rgba(42, 49, 64, 0.35);
  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.info .kind {
  color: var(--info);
}
.console-line.warn .kind {
  color: var(--warn);
}
.console-line.error .kind {
  color: var(--err);
}
.console-line.result .kind {
  color: var(--ok);
}
.console-line.system .kind {
  color: var(--muted);
}

.preview-frame {
  flex: 1;
  min-height: 10rem;
  width: 100%;
  border: 0;
  background: #fff;
}

.hint {
  margin: 0 0 0.85rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.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: rgba(0, 0, 0, 0.25);
}

.status {
  font-size: 0.78rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.python-layout,
.sql-layout,
.lua-layout {
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
}

.python-side {
  display: grid;
  grid-template-rows: minmax(12rem, 1fr) minmax(14rem, 1.15fr);
  gap: 0.85rem;
  min-height: 0;
}

.python-layout .console,
.sql-layout .console,
.lua-layout .console {
  min-height: 10rem;
  height: 100%;
}

.plot-frame {
  flex: 1;
  min-height: 14rem;
  max-height: 28rem;
  overflow: auto;
  padding: 0.75rem;
  background: #f8fafc;
  display: grid;
  gap: 0.75rem;
  align-content: start;
}

.plot-frame .plot-empty {
  margin: 0;
  color: #64748b;
  font-size: 0.88rem;
}

.plot-frame .plot-empty code {
  font-family: var(--mono);
  font-size: 0.82em;
}

.plot-frame > div,
.plot-frame canvas,
.plot-frame img {
  max-width: 100%;
  height: auto;
}

.plot-frame > div {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 0.35rem;
}

.web-layout {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.web-editors {
  display: grid;
  gap: 0.65rem;
  min-height: 0;
}

.web-editors .panel {
  min-height: 10rem;
}

.web-editors #code,
.web-editors #html-code,
.web-editors #css-code,
.web-editors #js-code {
  min-height: 8rem;
}

.result-table-wrap {
  overflow: auto;
  max-height: 18rem;
  padding: 0.55rem;
}

.result-table-wrap + .result-table-wrap {
  border-top: 1px solid var(--line);
}

.result-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.78rem;
}

.result-table th,
.result-table td {
  border: 1px solid var(--line);
  padding: 0.35rem 0.5rem;
  text-align: left;
  white-space: nowrap;
}

.result-table th {
  background: rgba(0, 0, 0, 0.25);
  color: var(--muted);
  font-weight: 700;
}

.ts-output {
  margin: 0;
  padding: 0.75rem 0.9rem;
  overflow: auto;
  min-height: 8rem;
  max-height: 14rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--muted);
  white-space: pre-wrap;
  background: rgba(0, 0, 0, 0.18);
  border-top: 1px solid var(--line);
}

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

  .python-side {
    grid-template-rows: auto auto;
  }
}

/* Shared tool layouts */
.tool-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
  min-height: 28rem;
}

.tool-layout.stack {
  grid-template-columns: 1fr;
  min-height: 0;
}

.tool-panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  overflow: hidden;
}

.tool-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.tool-textarea,
.tool-input {
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.86rem;
  line-height: 1.5;
  resize: vertical;
  padding: 0.75rem;
}

.tool-textarea {
  flex: 1;
  min-height: 16rem;
  resize: none;
}

.tool-textarea:focus,
.tool-input:focus {
  outline: none;
}

.tool-input {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.2);
  padding: 0.55rem 0.75rem;
}

.field-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0.75rem;
}

.field-row label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.88rem;
  color: var(--muted);
  cursor: pointer;
}

.field-row .grow {
  flex: 1;
  min-width: 12rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--mono);
}

.pill.ok {
  background: rgba(52, 211, 153, 0.15);
  color: var(--ok);
}

.pill.err {
  background: rgba(251, 113, 133, 0.15);
  color: var(--err);
}

.pill.info {
  background: rgba(56, 189, 248, 0.15);
  color: var(--info);
}

.kv-list {
  margin: 0;
  padding: 0.75rem;
  display: grid;
  gap: 0.55rem;
}

.kv-list dt {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.kv-list dd {
  margin: 0.2rem 0 0;
  font-family: var(--mono);
  font-size: 0.84rem;
  word-break: break-all;
  white-space: pre-wrap;
}

.match-list {
  list-style: none;
  margin: 0;
  padding: 0.5rem;
  display: grid;
  gap: 0.4rem;
  max-height: 22rem;
  overflow: auto;
}

.match-list li {
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 0.82rem;
  background: rgba(0, 0, 0, 0.18);
}

.match-list .meta {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.72rem;
  color: var(--muted);
}

.hl-mark {
  background: rgba(5, 150, 105, 0.35);
  color: inherit;
  border-radius: 2px;
}

.diff-view {
  margin: 0;
  padding: 0.5rem 0;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.45;
  overflow: auto;
  max-height: 32rem;
}

.diff-line {
  display: grid;
  grid-template-columns: 3rem 1fr;
  padding: 0.05rem 0.65rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.diff-line .ln {
  color: var(--muted);
  user-select: none;
}

.diff-line.add {
  background: rgba(52, 211, 153, 0.12);
}

.diff-line.del {
  background: rgba(251, 113, 133, 0.12);
}

.diff-line.ctx {
  color: var(--muted);
}

.md-preview {
  flex: 1;
  min-height: 16rem;
  padding: 1rem 1.1rem;
  overflow: auto;
  line-height: 1.55;
}

.md-preview h1,
.md-preview h2,
.md-preview h3 {
  margin: 1rem 0 0.45rem;
  line-height: 1.25;
  font-family: "Libre Baskerville", Georgia, serif;
}

.md-preview h1 {
  font-size: 1.55rem;
}

.md-preview h2 {
  font-size: 1.25rem;
}

.md-preview h3 {
  font-size: 1.05rem;
}

.md-preview p,
.md-preview ul,
.md-preview ol,
.md-preview pre,
.md-preview blockquote {
  margin: 0.55rem 0;
}

.md-preview code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: rgba(0, 0, 0, 0.28);
  padding: 0.1rem 0.3rem;
  border-radius: 4px;
}

.md-preview pre {
  padding: 0.75rem;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.28);
  overflow: auto;
}

.md-preview pre code {
  padding: 0;
  background: none;
}

.md-preview blockquote {
  padding-left: 0.85rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

.md-preview a {
  color: var(--accent);
}

.hash-grid {
  display: grid;
  gap: 0.65rem;
  padding: 0.75rem;
}

.hash-row {
  display: grid;
  gap: 0.25rem;
}

.hash-row .label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.hash-row .value {
  font-family: var(--mono);
  font-size: 0.8rem;
  word-break: break-all;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.18);
  min-height: 2.4rem;
}

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