/* ============================================================
   Codeforge — design tokens
   Palette: deep blue-slate workshop tones + warm amber accent
   (a forge/workbench feel — warm metal on dark steel, not
   the default near-black-and-vermilion SaaS look).
   Type: IBM Plex Sans (UI) + IBM Plex Mono (code/chat code)
   ============================================================ */

@font-face {
  font-family: "Plex Sans";
  src: url("../fonts/ibm-plex-sans-400.woff2") format("woff2");
  font-weight: 400; font-display: swap;
}
@font-face {
  font-family: "Plex Sans";
  src: url("../fonts/ibm-plex-sans-500.woff2") format("woff2");
  font-weight: 500; font-display: swap;
}
@font-face {
  font-family: "Plex Sans";
  src: url("../fonts/ibm-plex-sans-600.woff2") format("woff2");
  font-weight: 600; font-display: swap;
}
@font-face {
  font-family: "Plex Sans";
  src: url("../fonts/ibm-plex-sans-700.woff2") format("woff2");
  font-weight: 700; font-display: swap;
}
@font-face {
  font-family: "Plex Mono";
  src: url("../fonts/ibm-plex-mono-400.woff2") format("woff2");
  font-weight: 400; font-display: swap;
}
@font-face {
  font-family: "Plex Mono";
  src: url("../fonts/ibm-plex-mono-500.woff2") format("woff2");
  font-weight: 500; font-display: swap;
}

:root {
  /* Forge Dark (default) */
  --bg-0: #14171C;      /* app floor */
  --bg-1: #1B1F27;      /* panels */
  --bg-2: #232833;      /* raised surfaces / input fields */
  --bg-3: #2A303C;      /* hover state */
  --border: #333A47;
  --border-soft: #262C37;
  --text-hi: #E9EBEF;
  --text-mid: #AEB4C2;
  --text-low: #6E7686;
  --amber: #E8A33D;
  --amber-dim: rgba(232, 163, 61, 0.16);
  --amber-text: #F0B860;
  --teal: #5FC9C0;
  --teal-dim: rgba(95, 201, 192, 0.14);
  --danger: #E2604F;
  --danger-dim: rgba(226, 96, 79, 0.15);
  --radius-s: 4px;
  --radius-m: 7px;
  --font-ui: "Plex Sans", -apple-system, "Segoe UI", sans-serif;
  --font-code: "Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

[data-theme="forge-light"] {
  --bg-0: #F3F1EC;
  --bg-1: #FBFAF7;
  --bg-2: #FFFFFF;
  --bg-3: #ECE8DF;
  --border: #DAD5C8;
  --border-soft: #E7E3D8;
  --text-hi: #201D18;
  --text-mid: #5B564C;
  --text-low: #928C7D;
  --amber: #B5701A;
  --amber-dim: rgba(181, 112, 26, 0.12);
  --amber-text: #8F5713;
  --teal: #147B71;
  --teal-dim: rgba(20, 123, 113, 0.1);
}

* { box-sizing: border-box; }
/* Several elements toggle visibility via the `hidden` attribute (the
   install button, both modal backdrops). Without this, any later rule
   that sets `display` on the same element (e.g. .icon-btn, .modal-backdrop)
   ties with the browser's default [hidden]{display:none} in specificity
   and wins by source order — leaving "hidden" elements stuck visible,
   including after JS sets hidden back to true. !important guarantees
   hidden always wins regardless of what else targets the element. */
[hidden] { display: none !important; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font-ui);
  background: var(--bg-0);
  color: var(--text-hi);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font-family: inherit; color: inherit; }
::selection { background: var(--amber-dim); }

/* Custom scrollbars — thin, workshop-y */
* { scrollbar-width: thin; scrollbar-color: var(--border) transparent; }
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 6px; border: 2px solid transparent; background-clip: content-box; }
::-webkit-scrollbar-track { background: transparent; }

#app {
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ---------- Title bar ---------- */
.titlebar {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 46px;
  min-height: 46px;
  padding: 0 10px 0 14px;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border-soft);
  -webkit-app-region: drag;
}
.titlebar-mark {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.titlebar-name {
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.01em;
}
.tabbar {
  flex: 1;
  display: flex;
  gap: 2px;
  overflow-x: auto;
  height: 100%;
  align-items: flex-end;
  scrollbar-width: none;
}
.tabbar::-webkit-scrollbar { display: none; }
.tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px 7px 12px;
  font-size: 12.5px;
  color: var(--text-mid);
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: var(--radius-s) var(--radius-s) 0 0;
  cursor: pointer;
  white-space: nowrap;
  max-width: 160px;
  position: relative;
  top: 1px;
}
.tab .tab-name { overflow: hidden; text-overflow: ellipsis; }
.tab .tab-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--amber); flex-shrink: 0; display: none; }
.tab.unsaved .tab-dot { display: block; }
.tab.unsaved .tab-close { display: none; }
.tab:hover .tab-dot { display: none; }
.tab:hover .tab-close { display: flex; }
.tab .tab-close {
  display: none;
  align-items: center;
  justify-content: center;
  width: 16px; height: 16px;
  border-radius: 4px;
  color: var(--text-low);
  flex-shrink: 0;
}
.tab .tab-close:hover { background: var(--bg-3); color: var(--text-hi); }
.tab.active {
  background: var(--bg-0);
  color: var(--text-hi);
  border-color: var(--border-soft);
}
.titlebar-actions { display: flex; gap: 4px; flex-shrink: 0; }
.icon-btn {
  display: flex; align-items: center; justify-content: center;
  width: 30px; height: 30px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  color: var(--text-mid);
  cursor: pointer;
  transition: background .12s, color .12s, border-color .12s;
}
.icon-btn:hover { background: var(--bg-3); color: var(--text-hi); }
.icon-btn.small { width: 24px; height: 24px; }
.icon-btn.active { color: var(--amber); border-color: var(--amber-dim); background: var(--amber-dim); }

/* ---------- Workspace ---------- */
.workspace {
  flex: 1;
  display: flex;
  min-height: 0;
}
.editor-pane {
  flex: 1 1 auto;
  min-width: 240px;
  display: flex;
  flex-direction: column;
  background: var(--bg-0);
}
.editor-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  border-bottom: 1px solid var(--border-soft);
  background: var(--bg-0);
}
.editor-toolbar-left { display: flex; align-items: center; gap: 8px; }
#langSelect {
  background: var(--bg-1);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-s);
  padding: 4px 8px;
  font-size: 12px;
  color: var(--text-mid);
}
.run-btn {
  display: flex; align-items: center; gap: 5px;
  background: var(--amber-dim);
  color: var(--amber-text);
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  padding: 4px 10px 4px 8px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: filter .12s;
}
.run-btn:hover { filter: brightness(1.15); }
.run-btn.active { background: var(--amber); color: #1B1206; }
.editor-status { font-size: 11.5px; color: var(--text-low); font-family: var(--font-code); }
#editorHost { flex: 1; min-height: 0; }
#editorHost .CodeMirror {
  height: 100%;
  font-family: var(--font-code);
  font-size: 13.5px;
  line-height: 1.6;
}

.preview-panel {
  display: flex;
  flex-direction: column;
  flex: 1 1 45%;
  min-height: 0;
  border-top: 1px solid var(--border);
}
.preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 10px;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border-soft);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-mid);
}
.preview-actions { display: flex; gap: 2px; }
#previewFrame {
  flex: 1;
  width: 100%;
  border: 0;
  background: #ffffff;
}

.resizer {
  width: 6px;
  flex-shrink: 0;
  cursor: col-resize;
  background: var(--bg-1);
  border-left: 1px solid var(--border-soft);
  border-right: 1px solid var(--border-soft);
  position: relative;
}
.resizer:hover, .resizer.active { background: var(--amber-dim); }
.resizer:focus-visible { outline: 2px solid var(--amber); outline-offset: -2px; }

/* ---------- Chat pane ---------- */
.chat-pane {
  width: 380px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg-1);
  min-width: 280px;
  max-width: 70vw;
}
.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-mid);
  border-bottom: 1px solid var(--border-soft);
  letter-spacing: 0.01em;
}
.chat-header-actions { display: flex; align-items: center; gap: 10px; }
.context-toggle {
  display: flex; align-items: center; gap: 5px;
  font-size: 11px; font-weight: 400; color: var(--text-low);
  cursor: pointer; user-select: none;
}
.context-toggle input { accent-color: var(--amber); }

.chat-log {
  flex: 1;
  overflow-y: auto;
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.chat-empty {
  color: var(--text-low);
  font-size: 12.5px;
  line-height: 1.6;
  padding: 8px 4px;
}
.chat-empty-sub { color: var(--text-low); opacity: 0.75; margin-top: 6px; font-size: 11.5px; }

.msg { display: flex; flex-direction: column; gap: 4px; max-width: 100%; }
.msg-role {
  font-size: 10.5px;
  text-transform: none;
  color: var(--text-low);
  font-weight: 600;
}
.msg.user .msg-role { color: var(--teal); }
.msg.assistant .msg-role { color: var(--amber-text); }
.msg-bubble {
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-hi);
  white-space: pre-wrap;
  word-break: break-word;
}
.msg.user .msg-bubble {
  background: var(--bg-2);
  padding: 8px 10px;
  border-radius: var(--radius-m);
  border: 1px solid var(--border-soft);
}
.msg-bubble p { margin: 0 0 8px; }
.msg-bubble p:last-child { margin-bottom: 0; }
.msg-bubble code {
  font-family: var(--font-code);
  background: var(--bg-2);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 12px;
}
.code-block {
  margin: 6px 0;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--bg-0);
}
.code-block-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 5px 9px;
  background: var(--bg-2);
  font-size: 10.5px;
  color: var(--text-low);
  font-family: var(--font-code);
}
.code-block-actions { display: flex; gap: 6px; }
.code-block-actions button {
  background: transparent; border: none; color: var(--text-low);
  font-size: 10.5px; cursor: pointer; font-family: var(--font-ui);
  padding: 2px 6px; border-radius: 3px;
}
.code-block-actions button:hover { color: var(--amber-text); background: var(--amber-dim); }
.code-block pre {
  margin: 0;
  padding: 10px;
  overflow-x: auto;
  font-family: var(--font-code);
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-hi);
}
.msg.streaming .msg-bubble::after {
  content: "▍";
  color: var(--amber);
  animation: blink 1s step-start infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.msg-error .msg-bubble { color: var(--danger); }

.chat-input-row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 10px 12px;
  border-top: 1px solid var(--border-soft);
}
#chatInput {
  flex: 1;
  resize: none;
  background: var(--bg-2);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-m);
  padding: 9px 10px;
  font-size: 13px;
  color: var(--text-hi);
  max-height: 160px;
  line-height: 1.45;
}
#chatInput:focus { outline: none; border-color: var(--amber); }
.send-btn {
  width: 34px; height: 34px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--amber);
  color: #1B1206;
  border: none;
  border-radius: var(--radius-m);
  cursor: pointer;
  transition: filter .12s, transform .08s;
}
.send-btn:hover { filter: brightness(1.08); }
.send-btn:active { transform: scale(0.94); }
.send-btn:disabled { background: var(--bg-3); color: var(--text-low); cursor: not-allowed; }

/* ---------- Status bar ---------- */
.statusbar {
  height: 24px; min-height: 24px;
  display: flex; align-items: center; gap: 8px;
  padding: 0 12px;
  background: var(--bg-1);
  border-top: 1px solid var(--border-soft);
  font-size: 11px;
  color: var(--text-low);
  font-family: var(--font-code);
}
.statusbar-sep { opacity: 0.5; }
.status-pill { display: flex; align-items: center; gap: 5px; }
.status-pill::before { content: ""; width: 6px; height: 6px; border-radius: 50%; }
.status-missing::before { background: var(--danger); }
.status-ready::before { background: #6FCF8E; }

/* ---------- Modal ---------- */

.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(10, 12, 15, 0.6);
  display: flex; align-items: center; justify-content: center;
  z-index: 50;
  padding: 20px;
}
.modal {
  width: 420px;
  max-width: 100%;
  max-height: 88vh;
  overflow-y: auto;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  box-shadow: 0 20px 60px rgba(0,0,0,0.45);
}
.modal-small { width: 340px; }
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-soft);
}
.modal-header h2 { margin: 0; font-size: 15px; font-weight: 600; }
.modal-body { padding: 16px; display: flex; flex-direction: column; }
.field-label { font-size: 12px; font-weight: 600; color: var(--text-mid); margin: 14px 0 6px; }
.field-label:first-child { margin-top: 0; }
.field-hint { font-size: 11.5px; color: var(--text-low); margin: 6px 0 0; line-height: 1.5; }
.field-hint a { color: var(--amber-text); }
.key-input-row { display: flex; gap: 6px; }
#apiKeyInput, #modelSelect, #themeSelect, #systemPromptInput {
  width: 100%;
  background: var(--bg-2);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-s);
  padding: 8px 10px;
  font-size: 13px;
  color: var(--text-hi);
}
#systemPromptInput { resize: vertical; font-family: var(--font-code); font-size: 12.5px; }
#apiKeyInput:focus, #modelSelect:focus, #themeSelect:focus, #systemPromptInput:focus { outline: none; border-color: var(--amber); }
.modal-footer { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }
.btn-primary, .btn-ghost, .btn-danger {
  padding: 8px 14px;
  border-radius: var(--radius-s);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary { background: var(--amber); color: #1B1206; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { background: transparent; color: var(--text-mid); border-color: var(--border-soft); }
.btn-ghost:hover { background: var(--bg-3); color: var(--text-hi); }
.btn-danger { background: var(--danger-dim); color: var(--danger); }
.btn-danger:hover { filter: brightness(1.1); }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 34px;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text-hi);
  padding: 8px 14px;
  border-radius: var(--radius-m);
  font-size: 12.5px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s, transform .18s;
  z-index: 100;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .workspace { flex-direction: column; }
  .chat-pane { width: 100%; max-width: 100%; height: 42vh; border-top: 1px solid var(--border-soft); }
  .resizer { display: none; }
  .editor-pane { flex: 1 1 auto; min-height: 0; }
  .titlebar { padding: 0 8px; gap: 8px; }
  .titlebar-name { display: none; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .msg.streaming .msg-bubble::after { animation: none; }
  .toast { transition: none; }
}

/* Focus visibility */
button:focus-visible, select:focus-visible, input:focus-visible, .tab:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 1px;
}