/* GCAD Studio. One set of design tokens, two themes. */

:root {
  --font-ui: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  --radius: 8px;
  --radius-lg: 14px;
  --topbar-h: 50px;
  --ease: cubic-bezier(.2, .8, .2, 1);
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0d0f14;
  --panel: #12151c;
  --panel-2: #181c25;
  --panel-3: #1f2430;
  --border: #252b38;
  --border-strong: #323a4b;
  --text: #e7e9f0;
  --text-2: #b5bccd;
  --muted: #7d8699;
  --accent: #7b93ff;
  --accent-strong: #4c63e0;
  --accent-2: #3fd9c6;
  --accent-soft: rgba(123, 147, 255, .14);
  --ok: #3fd9a0;
  --warn: #f5b451;
  --error: #ff6b78;
  --info: #7b93ff;
  --glass: rgba(20, 24, 33, .72);
  --glass-border: rgba(255, 255, 255, .07);
  --shadow: 0 10px 30px rgba(0, 0, 0, .35), 0 1px 0 rgba(255, 255, 255, .03) inset;
  --shadow-xl: 0 30px 80px rgba(0, 0, 0, .55);
  --viewer-1: #1b2130;
  --viewer-2: #0d0f14;
  --selection: rgba(123, 147, 255, .28);
  --syn-keyword: #c49bff;
  --syn-fn: #7fb0ff;
  --syn-number: #ffab70;
  --syn-string: #a8e07a;
  --syn-comment: #5d6679;
  --syn-operator: #6fd3e0;
  --syn-atom: #f78fb3;
  --syn-var: #e7e9f0;
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #eef0f5;
  --panel: #ffffff;
  --panel-2: #f6f7fa;
  --panel-3: #eceef4;
  --border: #e1e4ec;
  --border-strong: #cfd4df;
  --text: #1a1e2b;
  --text-2: #3c4458;
  --muted: #6c7489;
  --accent: #4a6bff;
  --accent-strong: #3553e6;
  --accent-2: #12a594;
  --accent-soft: rgba(74, 107, 255, .1);
  --ok: #12a46f;
  --warn: #c98a12;
  --error: #e0394c;
  --info: #4a6bff;
  --glass: rgba(255, 255, 255, .78);
  --glass-border: rgba(20, 30, 60, .08);
  --shadow: 0 8px 24px rgba(30, 40, 80, .12);
  --shadow-xl: 0 30px 80px rgba(30, 40, 80, .25);
  --viewer-1: #ffffff;
  --viewer-2: #e3e7f0;
  --selection: rgba(74, 107, 255, .2);
  --syn-keyword: #8a3ffc;
  --syn-fn: #1d5fd6;
  --syn-number: #c4520a;
  --syn-string: #2d8a2d;
  --syn-comment: #8b93a5;
  --syn-operator: #0e7f8c;
  --syn-atom: #c2185b;
  --syn-var: #1a1e2b;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 13px/1.45 var(--font-ui);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}
button, input, select { font: inherit; color: inherit; }
kbd {
  font: 11px var(--font-mono);
  color: var(--muted);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 0 5px;
}
code { font-family: var(--font-mono); font-size: .95em; color: var(--syn-fn); }
[hidden] { display: none !important; }
.muted { color: var(--muted); }
.spacer { flex: 1; }

/* Icons: masked SVGs, so they take the current text colour. */
.icon {
  display: inline-block;
  width: 16px;
  height: 16px;
  background: currentColor;
  -webkit-mask: var(--i) center / contain no-repeat;
  mask: var(--i) center / contain no-repeat;
  flex: none;
}

.app {
  display: grid;
  grid-template-rows: var(--topbar-h) 1fr auto;
  height: 100vh;
}

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 12px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: 5;
}
.brand { display: flex; align-items: center; gap: 9px; padding-right: 10px; margin-right: 2px; border-right: 1px solid var(--border); height: 26px; }
.brand-name { font-weight: 650; letter-spacing: .2px; white-space: nowrap; }
.topbar > * { flex-shrink: 0; }
.topbar .spacer { flex-shrink: 1; min-width: 0; }
.brand-name span { font-weight: 450; color: var(--muted); }
.mode-chip { font-size: 11px; white-space: nowrap; color: var(--accent); background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); border-radius: 20px; padding: 0 8px; line-height: 18px; }
.mode-chip[hidden] { display: none; }

.file-button, .kernel-select {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 32px;
  padding: 0 10px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: transparent;
  cursor: pointer;
  color: var(--text-2);
  transition: background .15s, border-color .15s;
}
.file-button:hover, .kernel-select:hover { background: var(--panel-2); border-color: var(--border); }
.file-name { font-weight: 560; color: var(--text); max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chevron { width: 12px; height: 12px; opacity: .6; }
.dirty { width: 7px; height: 7px; border-radius: 50%; background: var(--warn); box-shadow: 0 0 0 3px rgba(245, 180, 81, .15); }
.read-only { font-size: 11px; color: var(--muted); border: 1px solid var(--border); border-radius: 20px; padding: 0 7px; }
.kernel-select select {
  appearance: none;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding-right: 4px;
  outline: none;
  color: var(--text);
  font-weight: 520;
}
.kernel-select select option { background: var(--panel); color: var(--text); }

.status {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 28px;
  padding: 0 11px;
  border-radius: 20px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.status[data-state="ok"] .status-dot { background: var(--ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 20%, transparent); }
.status[data-state="error"] .status-dot { background: var(--error); box-shadow: 0 0 0 3px color-mix(in srgb, var(--error) 22%, transparent); }
.status[data-state="error"] { color: var(--error); }
.status[data-state="busy"] .status-dot { background: var(--accent); animation: pulse 1s var(--ease) infinite; }
@keyframes pulse { 50% { transform: scale(.55); opacity: .5; } }

.switch { display: flex; align-items: center; gap: 7px; cursor: pointer; color: var(--text-2); user-select: none; }
.switch input { position: absolute; opacity: 0; pointer-events: none; }
.switch .track { width: 30px; height: 18px; border-radius: 10px; background: var(--panel-3); border: 1px solid var(--border-strong); position: relative; transition: background .2s; }
.switch .thumb { position: absolute; top: 2px; left: 2px; width: 12px; height: 12px; border-radius: 50%; background: var(--muted); transition: transform .2s var(--ease), background .2s; }
.switch input:checked + .track { background: var(--accent-soft); border-color: var(--accent); }
.switch input:checked + .track .thumb { transform: translateX(12px); background: var(--accent); }
.switch input:focus-visible + .track { outline: 2px solid var(--accent); outline-offset: 2px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 32px;
  padding: 0 13px;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  background: var(--panel-2);
  cursor: pointer;
  font-weight: 540;
  transition: background .15s, border-color .15s, transform .1s, box-shadow .15s;
}
.btn:hover { background: var(--panel-3); }
.btn:active { transform: translateY(1px); }
.btn .icon { width: 14px; height: 14px; }
.btn.primary {
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent-strong) 88%, white), var(--accent-strong));
  border-color: color-mix(in srgb, var(--accent-strong) 75%, black);
  color: white;
  box-shadow: 0 4px 14px color-mix(in srgb, var(--accent-strong) 35%, transparent), 0 1px 0 rgba(255, 255, 255, .18) inset;
}
.btn.primary:hover { filter: brightness(1.06); }
.btn:disabled { opacity: .5; cursor: default; }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  color: var(--text-2);
  transition: background .15s, color .15s;
}
.icon-btn:hover { background: var(--panel-3); color: var(--text); }
.icon-btn.small { width: 26px; height: 26px; }
.icon-btn.active { color: var(--accent); background: var(--accent-soft); }
:is(button, select, input):focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

/* ---------- workspace ---------- */
.workspace {
  display: grid;
  grid-template-columns: var(--editor-w, 44%) 6px 1fr;
  min-height: 0;
}
.pane { position: relative; min-width: 0; min-height: 0; overflow: hidden; }
.editor-pane { background: var(--panel); }
#editor { height: 100%; }
.splitter { cursor: col-resize; background: var(--border); position: relative; transition: background .15s; }
.splitter::after { content: ""; position: absolute; inset: 0 -4px; }
.splitter:hover, .splitter.dragging { background: var(--accent); }

.viewer-pane { background: radial-gradient(120% 90% at 50% 15%, var(--viewer-1), var(--viewer-2)); }
#viewer, #viewer canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
#viewer canvas { outline: none; }

.glass {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px) saturate(1.3);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
}
.viewer-toolbar {
  position: absolute;
  top: 14px;
  right: 14px;
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
}
.viewer-toolbar .sep { width: 1px; height: 18px; background: var(--border-strong); margin: 0 4px; }
.view-label { font: 600 12px var(--font-mono); }

.model-card {
  position: absolute;
  left: 14px;
  bottom: 14px;
  padding: 10px 14px;
  display: grid;
  grid-template-columns: auto auto;
  gap: 2px 14px;
  font-size: 12px;
}
.model-card dt { color: var(--muted); }
.model-card dd { margin: 0; font-family: var(--font-mono); font-variant-numeric: tabular-nums; text-align: right; color: var(--text); }
.model-card .size { grid-column: 1 / -1; font: 600 14px var(--font-mono); margin-bottom: 4px; letter-spacing: .2px; }
.model-card .size small { color: var(--muted); font-weight: 400; font-size: 12px; }

/* the annotation (PMI) panel, under the viewer toolbar */
.pmi-panel {
  position: absolute;
  top: 62px;
  right: 14px;
  width: min(340px, calc(100% - 28px));
  max-height: calc(100% - 180px);
  display: flex;
  flex-direction: column;
  font-size: 12px;
  overflow: hidden;
}
.pmi-head { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.pmi-head .spacer { flex: 1; }
.pmi-panel.collapsed .pmi-body { display: none; }
.pmi-panel.collapsed .pmi-head { border-bottom: 0; }
.pmi-body { overflow: auto; padding: 4px 0 6px; }
.pmi-views { display: flex; flex-wrap: wrap; gap: 4px; padding: 6px 10px; }
.chip { font: inherit; font-size: 11px; color: var(--text-2); background: var(--panel-2); border: 1px solid var(--border); border-radius: 20px; padding: 1px 9px; cursor: pointer; }
.chip:hover { border-color: var(--border-strong); color: var(--text); }
.chip.active { color: var(--accent); background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
.pmi-section summary { cursor: pointer; padding: 5px 10px; color: var(--muted); font-weight: 560; user-select: none; }
.pmi-row { display: flex; align-items: center; gap: 7px; padding: 3px 10px 3px 14px; cursor: pointer; }
.pmi-row:hover { background: var(--panel-2); }
.pmi-row.active { background: var(--accent-soft); }
.pmi-row.hit .pmi-label { color: var(--accent); }
.pmi-row input { margin: 0; accent-color: var(--accent); }
.pmi-kind { width: 13px; text-align: center; color: var(--muted); }
.pmi-label { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text); }
.pmi-ref { font-family: var(--font-mono); font-size: 11px; color: var(--muted); }
.pmi-details { margin: 6px 10px 2px; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; background: var(--panel-2); }
.pmi-details dl { display: grid; grid-template-columns: auto 1fr; gap: 3px 10px; margin: 0; }
.pmi-details dt { color: var(--muted); }
.pmi-details dd { margin: 0; color: var(--text); overflow-wrap: anywhere; }
.pmi-details .targets { display: flex; flex-wrap: wrap; gap: 4px; }

.pick-card {
  position: absolute;
  left: 14px;
  top: 14px;
  padding: 7px 12px;
  font-size: 12px;
  display: flex;
  gap: 8px;
  align-items: center;
  max-width: calc(100% - 330px);
  min-width: 0;
  white-space: nowrap;
  animation: rise .18s var(--ease);
}
.pick-card code { overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.pick-card .swatch { width: 10px; height: 10px; border-radius: 3px; flex: none; }

.empty-state {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 4px;
  color: var(--text-2);
  pointer-events: none;
  text-align: center;
}
.empty-state img { opacity: .9; margin-bottom: 8px; filter: drop-shadow(0 8px 20px rgba(123, 147, 255, .35)); }
.empty-state p { margin: 0; }
.empty-state .hint { color: var(--muted); font-size: 12px; }

/* ---------- console ---------- */
.console {
  position: relative;
  background: var(--panel);
  border-top: 1px solid var(--border);
  height: var(--console-h, 130px);
  display: grid;
  grid-template-rows: 36px 1fr;
  min-height: 36px;
}
.console.collapsed { height: 36px; }
.console.collapsed .console-body { display: none; }
.console.collapsed #console-toggle .icon { transform: rotate(180deg); }
.console-resize { position: absolute; top: -4px; left: 0; right: 0; height: 8px; cursor: row-resize; z-index: 2; }
.console-tabs { display: flex; align-items: center; gap: 2px; padding: 0 8px; border-bottom: 1px solid var(--border); }
.tab {
  height: 36px;
  padding: 0 11px;
  border: 0;
  background: none;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 520;
}
.tab:hover { color: var(--text-2); }
.tab.active { color: var(--text); border-bottom-color: var(--accent); }
.badge { min-width: 18px; height: 18px; padding: 0 5px; border-radius: 9px; background: var(--panel-3); color: var(--text-2); font-size: 11px; display: inline-grid; place-items: center; }
.badge.error { background: color-mix(in srgb, var(--error) 18%, transparent); color: var(--error); }
.badge.warn { background: color-mix(in srgb, var(--warn) 18%, transparent); color: var(--warn); }
.console-meta { color: var(--muted); font-size: 12px; margin-right: 6px; font-variant-numeric: tabular-nums; }
.console-body { overflow: auto; min-height: 0; }
.problems { list-style: none; margin: 0; padding: 4px 0; }
.problems li {
  display: grid;
  grid-template-columns: 18px 1fr auto;
  gap: 8px;
  align-items: start;
  padding: 5px 14px;
  cursor: pointer;
}
.problems li:hover { background: var(--panel-2); }
.problems .sev { width: 14px; height: 14px; margin-top: 2px; }
.problems .sev.error { color: var(--error); }
.problems .sev.warning { color: var(--warn); }
.problems .sev.info { color: var(--info); }
.problems .where { color: var(--muted); font: 12px var(--font-mono); }
.problems .empty { color: var(--muted); cursor: default; display: block; }
.problems .empty:hover { background: none; }
.output, .gcore { margin: 0; padding: 8px 14px; font: 12px/1.6 var(--font-mono); color: var(--text-2); white-space: pre-wrap; }
.output .line { display: flex; gap: 10px; }
.output .time { color: var(--muted); flex: none; }

/* ---------- editor (CodeMirror) ---------- */
.cm-editor { height: 100%; font-size: 13.5px; }
.cm-editor .cm-scroller { font-family: var(--font-mono); line-height: 1.6; }
.cm-tooltip.number-scrub {
  border: 1px solid var(--border-strong) !important;
  background: var(--glass) !important;
  backdrop-filter: blur(12px);
  border-radius: 10px;
  padding: 8px 10px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 10px;
}
.number-scrub input[type="range"] { width: 180px; accent-color: var(--accent); }
.number-scrub .value { font: 600 12px var(--font-mono); color: var(--syn-number); min-width: 56px; text-align: right; }
.number-scrub .hint { color: var(--muted); font-size: 11px; }

/* ---------- dialogs ---------- */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 15, .45);
  backdrop-filter: blur(3px);
  display: grid;
  place-items: start center;
  padding-top: 12vh;
  z-index: 20;
  animation: fade .15s ease-out;
}
.dialog {
  width: min(640px, calc(100vw - 32px));
  background: var(--panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  animation: rise .18s var(--ease);
  overflow: hidden;
}
@keyframes fade { from { opacity: 0; } }
@keyframes rise { from { opacity: 0; transform: translateY(8px) scale(.985); } }
.dialog h2 { margin: 0; font-size: 16px; font-weight: 650; }
.dialog-head { display: flex; justify-content: space-between; align-items: start; padding: 18px 18px 6px; }
.dialog-head p { margin: 3px 0 0; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 14px; }

.palette-search { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-bottom: 1px solid var(--border); color: var(--muted); }
.palette-search input { flex: 1; border: 0; outline: none; background: none; font-size: 15px; color: var(--text); }
.palette-list { list-style: none; margin: 0; padding: 6px; max-height: 52vh; overflow: auto; }
.palette-list .section { padding: 10px 10px 4px; font-size: 11px; font-weight: 650; letter-spacing: .6px; text-transform: uppercase; color: var(--muted); }
.palette-list .item { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: var(--radius); cursor: pointer; }
.palette-list .item .icon { color: var(--muted); }
.palette-list .item .name { flex: 1; }
.palette-list .item .kernel { font-size: 11px; color: var(--muted); border: 1px solid var(--border); border-radius: 20px; padding: 0 7px; }
.palette-list .item.selected { background: var(--accent-soft); }
.palette-list .item.selected .icon { color: var(--accent); }
.palette-foot { padding: 8px 14px; border-top: 1px solid var(--border); color: var(--muted); font-size: 12px; display: flex; gap: 14px; }

.dialog.save { padding: 18px; width: min(460px, calc(100vw - 32px)); }
.dialog.save p { margin: 4px 0 12px; font-size: 12px; word-break: break-all; }
.dialog.save input, .export-options select {
  width: 100%;
  height: 36px;
  padding: 0 11px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--panel-2);
  outline: none;
  font-family: var(--font-mono);
}
.dialog.save input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.dialog.export { width: min(760px, calc(100vw - 32px)); }
.export-groups { padding: 8px 18px 4px; display: grid; gap: 14px; max-height: 60vh; overflow: auto; }
.export-group h3 { margin: 0 0 8px; font-size: 11px; font-weight: 650; letter-spacing: .6px; text-transform: uppercase; color: var(--muted); display: flex; gap: 8px; align-items: baseline; }
.export-group h3 span { text-transform: none; letter-spacing: 0; font-weight: 450; }
.export-group .group-note { margin: -2px 0 8px; font-size: 12px; color: var(--text-2); }
.export-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 8px; }
.format {
  display: grid;
  gap: 2px;
  text-align: left;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-2);
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .1s;
}
.format b { font: 650 13px var(--font-mono); letter-spacing: .3px; }
.format small { color: var(--muted); font-size: 11px; line-height: 1.35; }
.format:hover:not(:disabled) { border-color: var(--accent); background: var(--accent-soft); }
.format:active:not(:disabled) { transform: translateY(1px); }
.format:disabled { opacity: .42; cursor: not-allowed; }
.format.busy { border-color: var(--accent); }
.export-options { display: flex; gap: 14px; padding: 12px 18px 16px; border-top: 1px solid var(--border); margin-top: 10px; align-items: end; flex-wrap: wrap; }
.export-options label { display: grid; gap: 4px; font-size: 11px; color: var(--muted); }
.export-options select { height: 30px; width: auto; min-width: 110px; font-family: var(--font-ui); }
.export-options .check { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-2); height: 30px; }

/* ---------- toasts ---------- */
.toasts { position: fixed; right: 16px; bottom: 16px; display: grid; gap: 8px; z-index: 30; }
.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  min-width: 240px;
  max-width: 420px;
  border-radius: 10px;
  background: var(--panel);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow);
  animation: rise .2s var(--ease);
}
.toast .icon { color: var(--ok); }
.toast.error .icon { color: var(--error); }

/* ---------- scrollbars ---------- */
* { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }

/* ---------- narrow screens: stack editor over viewer ---------- */
@media (max-width: 820px) {
  .workspace { grid-template-columns: 1fr; grid-template-rows: 45% 6px 1fr; }
  .splitter { cursor: row-resize; }
  .brand-name, .switch-label, .file-button kbd { display: none; }
  .btn { padding: 0 10px; }
  .btn:not(.primary) { font-size: 0; gap: 0; }
}