:root {
  color-scheme: dark;
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1c2129;
  --border: #2d333b;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #4493f8;
  --accent-dim: #1f6feb;
  --danger: #f85149;
  --ok: #3fb950;
}

* {
  box-sizing: border-box;
}

html,
body,
#root {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans", sans-serif;
}

h1,
h2 {
  margin: 0;
}

h2 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 10px;
}

.muted {
  color: var(--muted);
  font-weight: 400;
  font-size: 12px;
}

.error {
  color: var(--danger);
  background: rgba(248, 81, 73, 0.08);
  border: 1px solid rgba(248, 81, 73, 0.4);
  border-radius: 6px;
  padding: 8px 12px;
  margin-top: 10px;
  white-space: pre-wrap;
  font-size: 13px;
}

.error.banner {
  margin: 0 16px 12px;
  max-height: 180px;
  overflow: auto;
}

/* ---------- buttons ---------- */

.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.btn:hover:not(:disabled) {
  border-color: var(--muted);
}

.btn:disabled {
  opacity: 0.55;
  cursor: default;
}

.btn.primary {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
}

.btn.primary:hover:not(:disabled) {
  background: var(--accent);
  border-color: var(--accent);
}

.btn.ghost {
  background: transparent;
}

/* ---------- home ---------- */

.home {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.home-card {
  width: min(640px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px;
}

.home-card h1 {
  font-size: 32px;
  margin-bottom: 8px;
}

.home-card .sub {
  color: var(--muted);
  margin: 0 0 24px;
}

.home-form {
  display: flex;
  gap: 10px;
}

.home-form input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 10px 12px;
  font-size: 14px;
}

.home-form input:focus {
  outline: none;
  border-color: var(--accent);
}

.paste-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.paste-form input,
.paste-form textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 10px 12px;
  font-size: 14px;
}

.paste-form textarea {
  resize: vertical;
  min-height: 160px;
  font: 13px/1.5 inherit;
}

.paste-form input:focus,
.paste-form textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.paste-form .btn {
  align-self: flex-end;
}

.link {
  appearance: none;
  background: none;
  border: none;
  padding: 0;
  margin: 12px 0 0;
  color: var(--accent);
  font-size: 13px;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.link:hover {
  color: var(--text);
}

.hint {
  color: var(--muted);
  font-size: 12px;
  margin: 16px 0 0;
}

/* ---------- shared layout ---------- */

.workspace,
.pdf-screen {
  height: 100%;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.topbar-title {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar-title strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topbar-title .muted {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topbar-actions {
  display: flex;
  gap: 8px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

/* ---------- workspace ---------- */

.workspace-grid {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 12px 16px;
  min-height: 0;
}

.jd-text {
  flex: 1;
  overflow: auto;
  white-space: pre-wrap;
  font: 13px/1.55 inherit;
  margin: 0;
  color: var(--text);
}

.loading {
  color: var(--muted);
  padding: 20px 0;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.chip {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 12px;
}

.chip em {
  color: var(--muted);
  font-style: normal;
}

.chip.language {
  border-color: #3fb95066;
}

.chip.framework {
  border-color: #4493f866;
}

.chip.methodology {
  border-color: #d2a8ff66;
}

.chip.domain {
  border-color: #f0883e66;
}

.chip.mini {
  padding: 1px 8px;
  font-size: 11px;
}

.items {
  flex: 1;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.item-card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
}

.item-card header {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
}

.item-card ul {
  margin: 8px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 12.5px;
}

.item-card li {
  margin-bottom: 4px;
}

.mini-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}

.badge {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: 4px;
  padding: 1px 6px;
  font-weight: 700;
}

.badge.experience {
  background: #1f6feb33;
  color: var(--accent);
}

.badge.project {
  background: #3fb95033;
  color: var(--ok);
}

/* ---------- chat ---------- */

.chat {
  margin: 0 16px 16px;
  height: 240px;
  flex-shrink: 0;
}

.chat-log {
  flex: 1;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-right: 4px;
}

.chat-empty {
  padding: 8px 0;
}

.msg {
  max-width: 72%;
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 13.5px;
  white-space: pre-wrap;
}

.msg.user {
  align-self: flex-end;
  background: var(--accent-dim);
}

.msg.assistant {
  align-self: flex-start;
  background: var(--panel-2);
  border: 1px solid var(--border);
}

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

.chat-form {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.chat-form input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 8px 12px;
  font-size: 14px;
}

.chat-form input:focus {
  outline: none;
  border-color: var(--accent);
}

/* ---------- pdf screen ---------- */

.pdf-grid {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 12px 16px;
  min-height: 0;
}

.latex-editor {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font: 12px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  padding: 10px;
  resize: none;
  white-space: pre;
}

.latex-editor:focus {
  outline: none;
  border-color: var(--accent);
}

.preview-frame {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #525659;
  width: 100%;
}