:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --panel-2: #eef2f7;
  --panel-3: #f8fafc;
  --text: #182033;
  --muted: #687386;
  --line: #d9e0ea;
  --accent: #2563eb;
  --accent-2: #0891b2;
  --danger: #dc2626;
  --shadow: 0 16px 44px rgb(15 23 42 / 14%);
  --font: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --editor-size: 15px;
  --tab-size: 2;
}

[data-theme="dark"] {
  --bg: #0b1220;
  --panel: #111827;
  --panel-2: #182235;
  --panel-3: #0f172a;
  --text: #e5edf9;
  --muted: #94a3b8;
  --line: #29364d;
  --accent: #60a5fa;
  --accent-2: #22d3ee;
  --danger: #f87171;
  --shadow: 0 16px 44px rgb(0 0 0 / 52%);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  overflow: hidden;
}
button, input, select { font: inherit; }
button, select { -webkit-tap-highlight-color: transparent; }

.app-shell {
  height: 100%;
  display: grid;
  grid-template-rows: 48px 38px minmax(0, 1fr) 28px;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 12px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  text-decoration: none;
  font-weight: 750;
  white-space: nowrap;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 27px;
  height: 27px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
}

.menubar { display: flex; align-items: center; gap: 2px; }
.menu-trigger,
.icon-btn,
.statusbar button {
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  border-radius: 6px;
}
.menu-trigger { padding: 7px 9px; }
.menu-trigger:hover,
.menu-trigger:focus-visible,
.icon-btn:hover,
.icon-btn:focus-visible,
.statusbar button:hover,
.statusbar button:focus-visible { background: var(--panel-2); outline: none; }

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 5px;
  min-width: 0;
}
.icon-btn { height: 32px; padding: 0 10px; }
.icon-btn.square { width: 32px; padding: 0; }
.icon-btn.primary,
.btn.primary { background: var(--accent); color: #fff; border-color: transparent; }
.icon-btn.primary:hover,
.btn.primary:hover { filter: brightness(1.06); }

.language-control {
  height: 32px;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 0 5px 0 7px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--panel);
  color: var(--muted);
}
.language-control:focus-within { outline: 2px solid color-mix(in srgb, var(--accent) 38%, transparent); }
.language-control select {
  height: 28px;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
}
.language-control option { background: var(--panel); color: var(--text); }

.tabs {
  display: flex;
  align-items: end;
  overflow-x: auto;
  background: var(--panel-2);
  border-bottom: 1px solid var(--line);
  padding: 4px 6px 0;
  gap: 3px;
}
.tab {
  min-width: 120px;
  max-width: 240px;
  height: 34px;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 8px 0 11px;
  border: 1px solid transparent;
  border-bottom: 0;
  border-radius: 8px 8px 0 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.tab.active { background: var(--panel); color: var(--text); border-color: var(--line); }
.tab-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tab-dirty { font-size: 12px; }
.tab-close {
  margin-left: auto;
  border: 0;
  background: transparent;
  color: inherit;
  border-radius: 5px;
  cursor: pointer;
}
.tab-close:hover { background: var(--panel-2); }

.workspace { position: relative; min-height: 0; background: var(--panel); }
.welcome-panel {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 30px;
  background: radial-gradient(circle at 50% 35%, color-mix(in srgb, var(--accent) 9%, transparent), transparent 38%);
}
.welcome-icon { font: 700 52px var(--mono); color: var(--accent); }
.welcome-panel h1 { font-size: clamp(26px, 4vw, 44px); margin: 14px 0 6px; }
.welcome-panel p { color: var(--muted); font-size: 18px; margin: 0; }
.welcome-actions { display: flex; gap: 10px; margin: 24px 18px 18px; }
.btn {
  min-height: 38px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  padding: 9px 16px;
  border-radius: 8px;
  font-weight: 650;
  cursor: pointer;
}
.btn:hover { background: var(--panel-2); }
.btn.primary:hover { background: var(--accent); }
.privacy-note { font-size: 13px; color: var(--muted); }

.editor-area { height: 100%; display: grid; grid-template-rows: auto minmax(0, 1fr); min-height: 0; }
.find-panel {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
.find-panel input[type="text"] {
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  padding: 0 9px;
}
.find-panel button {
  height: 30px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  border-radius: 6px;
  cursor: pointer;
}
.find-panel button:hover { background: var(--panel-3); }
.find-panel label { font-size: 12px; color: var(--muted); }
.editor-wrap { min-height: 0; overflow: hidden; background: var(--panel); height: 100%; }
.editor-host {
  height: 100%;
  min-height: 0;
  --editor-font-size: 15px;
  --editor-tab-size: 2;
  background: var(--panel);
  color: var(--text);
}
.editor-host .cm-editor { height: 100%; font-size: var(--editor-font-size); background: var(--panel); color: var(--text); }
.editor-host .cm-scroller { font-family: var(--mono); line-height: 1.55; tab-size: var(--editor-tab-size); overflow: auto; }
.editor-host .cm-content { padding: 12px 0; caret-color: var(--text); }
.editor-host .cm-line { padding: 0 14px; }
.editor-host .cm-gutters {
  background: var(--panel-2);
  color: var(--muted);
  border-right: 1px solid var(--line);
  min-width: 48px;
}
.editor-host .cm-lineNumbers .cm-gutterElement { padding: 0 10px 0 6px; }
.editor-host .cm-activeLine { background: color-mix(in srgb, var(--accent) 7%, transparent); }
.editor-host .cm-activeLineGutter { background: color-mix(in srgb, var(--accent) 9%, var(--panel-2)); }
.editor-host .cm-selectionBackground,
.editor-host .cm-content ::selection { background: rgb(96 165 250 / 40%) !important; }
.editor-host .cm-focused { outline: none; }
.editor-host.is-fallback { position: relative; }
.fallback-editor {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 12px 14px;
  border: 0;
  outline: 0;
  resize: none;
  background: var(--panel);
  color: var(--text);
  font: var(--editor-font-size)/1.55 var(--mono);
  tab-size: var(--editor-tab-size);
  white-space: pre;
  overflow: auto;
}

.statusbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 9px;
  background: var(--panel-2);
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
  overflow: auto;
}
.status-spacer { flex: 1; }

.menu-layer {
  position: fixed;
  z-index: 80;
  min-width: 245px;
  max-height: min(70vh, 520px);
  overflow-y: auto;
  padding: 6px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 9px;
  box-shadow: var(--shadow);
}
.menu-item {
  display: flex;
  width: 100%;
  align-items: center;
  gap: 12px;
  border: 0;
  background: transparent;
  color: var(--text);
  padding: 8px 9px;
  border-radius: 6px;
  cursor: pointer;
  text-align: left;
}
.menu-item:hover, .menu-item:focus-visible { background: var(--panel-2); outline: none; }
.menu-item kbd { margin-left: auto; color: var(--muted); font: 11px var(--font); }
.menu-sep { height: 1px; background: var(--line); margin: 5px; }

.drop-overlay {
  position: absolute;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 24px;
  pointer-events: none;
  background: color-mix(in srgb, var(--panel) 76%, transparent);
  backdrop-filter: blur(3px);
}
.drop-card {
  width: min(520px, 92%);
  min-height: 210px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 28px;
  border: 3px dashed var(--accent);
  border-radius: 18px;
  background: color-mix(in srgb, var(--panel) 96%, transparent);
  box-shadow: var(--shadow);
  text-align: center;
  color: var(--accent);
}
.drop-icon { font-size: 46px; line-height: 1; }
.drop-card strong { font-size: 24px; }
.drop-card span:last-child { color: var(--muted); font-size: 14px; }

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgb(2 6 23 / 60%);
  display: grid;
  place-items: center;
  padding: 20px;
}
.modal {
  width: min(720px, 100%);
  max-height: min(88vh, 800px);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.modal > header { display: flex; align-items: center; padding: 14px 16px; border-bottom: 1px solid var(--line); }
.modal h2 { margin: 0; font-size: 18px; }
.modal > header button {
  margin-left: auto;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 24px;
  cursor: pointer;
  border-radius: 6px;
}
.modal > header button:hover { color: var(--text); background: var(--panel-2); }
.modal-body { padding: 18px 16px; overflow: auto; }
.modal-body > :first-child { margin-top: 0; }
.modal-body > :last-child { margin-bottom: 0; }
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--line);
}
.modal-actions:empty { display: none; }
.modal pre {
  padding: 12px;
  background: var(--panel-2);
  border-radius: 8px;
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.modal a { color: var(--accent); }
.modal-subtitle { margin-top: -6px; color: var(--muted); }

.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.settings-grid label { display: grid; gap: 5px; }
.settings-grid select,
.settings-grid input[type="number"],
.settings-grid input[type="text"] {
  height: 36px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  border-radius: 7px;
  padding: 0 8px;
}
.settings-grid .checkbox-setting {
  grid-template-columns: 1fr auto;
  align-items: center;
  min-height: 36px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
}

.bug-modal { width: min(760px, 100%); }
.bug-intro { line-height: 1.5; }
.bug-email-row,
.bug-tech-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-3);
}
.bug-email-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px;
  margin: 22px 0 14px;
}
.bug-email-row a { font-weight: 750; }
.bug-tech-card { padding: 14px; }
.bug-tech-card > strong { display: block; margin-bottom: 8px; }
.bug-tech-card pre {
  margin: 0;
  padding: 0;
  background: transparent;
  color: var(--muted);
  font: 12px/1.5 var(--mono);
  max-height: 260px;
}
.bug-modal .modal-actions .btn:first-child { margin-right: auto; }

.toast-region { position: fixed; z-index: 150; right: 14px; bottom: 42px; display: grid; gap: 8px; }
.toast {
  max-width: min(420px, calc(100vw - 28px));
  padding: 11px 14px;
  border-radius: 8px;
  background: var(--text);
  color: var(--panel);
  box-shadow: var(--shadow);
  animation: toast-in 0.18s ease;
}
.diff { font: 13px/1.5 var(--mono); }
.diff-add { background: rgb(22 163 74 / 13%); }
.diff-del { background: rgb(220 38 38 / 13%); }
.warning { padding: 11px; border-left: 4px solid #f59e0b; background: rgb(245 158 11 / 9%); }
.danger { color: var(--danger); }
.engine-note { font-size: 12px; color: var(--muted); margin-top: 10px; }

@keyframes toast-in {
  from { transform: translateY(8px); opacity: 0; }
}

@media (max-width: 820px) {
  .menubar { display: none; }
  .language-control span { display: none; }
}

@media (max-width: 620px) {
  .header-actions #saveBtn { display: none; }
  .app-shell { grid-template-rows: 48px 38px minmax(0, 1fr) 32px; }
  .statusbar { gap: 7px; }
  .settings-grid { grid-template-columns: 1fr; }
  .find-panel input[type="text"] { width: 135px; }
  .editor-host .cm-gutters { min-width: 40px; }
  .editor-host .cm-lineNumbers .cm-gutterElement { padding-right: 7px; }
  .modal-backdrop { padding: 10px; }
  .modal-actions { flex-wrap: wrap; }
  .bug-modal .modal-actions .btn { flex: 1 1 100%; }
  .bug-modal .modal-actions .btn:first-child { margin-right: 0; }
  .bug-email-row { align-items: flex-start; flex-direction: column; gap: 6px; }
  .drop-card { min-height: 180px; }
  .drop-card strong { font-size: 20px; }
}