:root {
  --bg: #11131a; --panel: #1a1d29; --panel-2: #222636; --line: #32384e;
  --text: #e8eaf3; --muted: #a2a8c0; --accent: #8ba2ff; --accent-ink: #0d1024;
  --ok: #7ee787; --bad: #ff7b72;
  --out-bg: #0c0e14;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, system-ui, sans-serif;
}
:root[data-theme="oled"] {
  --bg: #000000; --panel: #0a0a0d; --panel-2: #141419; --line: #262630;
  --text: #f0f2f8; --muted: #959bb4; --accent: #7995ff; --accent-ink: #000000;
  --ok: #56d364; --bad: #f85149;
  --out-bg: #000000;
}
:root[data-theme="light"] {
  --bg: #f6f8fa; --panel: #ffffff; --panel-2: #f0f3f6; --line: #d0d7de;
  --text: #1f2328; --muted: #59636e; --accent: #0969da; --accent-ink: #ffffff;
  --ok: #1a7f37; --bad: #cf222e;
  --out-bg: #ffffff;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 var(--sans);
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding-top: max(16px, env(safe-area-inset-top));
  padding-left: max(12px, env(safe-area-inset-left));
  padding-right: max(12px, env(safe-area-inset-right));
  padding-bottom: max(20px, env(safe-area-inset-bottom));
  transition: background .15s ease, color .15s ease;
}
header, main, footer { width: 100%; max-width: 1320px; margin: 0 auto; padding: 0 12px; }
header {
  padding-bottom: 14px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px 18px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 16px;
}
.title-group { flex: 1; min-width: 260px; display: flex; align-items: center; gap: 14px; }
.logo-button {
  background: transparent;
  border: 1px solid transparent;
  padding: 2px;
  border-radius: 12px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  min-width: 52px;
  touch-action: manipulation;
  transition: transform .2s cubic-bezier(0.34, 1.56, 0.64, 1), border-color .15s, background .15s;
}
.logo-button:hover {
  border-color: var(--line);
  background: var(--panel-2);
  transform: scale(1.05);
}
.logo-button:active {
  transform: scale(0.95);
}
h1 { margin: 0; font-size: 1.52rem; font-weight: 750; letter-spacing: -.02em; line-height: 1.2; }
header p { margin: 3px 0 0; color: var(--muted); font-size: .875rem; }
.header-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* Buttons & Inputs */
select, input[type=text], input[type=password], textarea, button { font: inherit; color: inherit; }
input[type=text], input[type=password], select {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  min-height: 44px; /* iOS min touch target */
  font-size: 16px; /* Prevents auto-zoom in iOS Safari */
}
button {
  cursor: pointer;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
  padding: 8px 12px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-weight: 500;
  touch-action: manipulation;
  transition: border-color .15s, background .15s, filter .15s;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 650; }
button.primary:hover { filter: brightness(1.08); }
button.primary:active { filter: brightness(0.96); }
button:disabled { opacity: .55; cursor: progress; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

/* Mobile tabs switcher */
.mobile-tabs {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  background: var(--panel-2);
  padding: 4px;
  border-radius: 10px;
  border: 1px solid var(--line);
  margin: 2px 0 6px;
  grid-column: 1 / -1;
}
.mobile-tab-btn {
  border: none;
  background: transparent;
  border-radius: 6px;
  padding: 8px;
  font-size: .875rem;
  font-weight: 600;
  color: var(--muted);
  min-height: 40px;
}
.mobile-tab-btn.active {
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

main { flex: 1; display: grid; gap: 16px; }
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--line);
}
.bar h2 { margin: 0; font-size: .95rem; font-weight: 650; margin-right: auto; }

#code {
  flex: 1;
  min-height: 380px;
  width: 100%;
  resize: vertical;
  border: 0;
  background: transparent;
  padding: 14px;
  font: .9375rem/1.55 var(--mono);
  tab-size: 2;
  color: inherit;
  -webkit-overflow-scrolling: touch;
}
#code:focus-visible { outline-offset: -3px; }

.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; margin: 0; padding: 0; }
.seg label { display: flex; padding: 0; color: var(--text); }
.seg input { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); border: 0; }
.seg:disabled { opacity: .5; }
.seg:disabled span { cursor: not-allowed; }
.seg span { padding: 6px 11px; min-height: 36px; display: flex; align-items: center; cursor: pointer; font-size: .85rem; }
.seg input:checked + span { background: var(--accent); color: var(--accent-ink); font-weight: 650; }
.seg input:focus-visible + span { outline: 3px solid var(--accent); outline-offset: -3px; }

#status {
  padding: 10px 14px;
  font-size: .875rem;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  min-height: 42px;
  display: flex;
  align-items: center;
}
#status.ok { color: var(--ok); }
#status.err { color: var(--bad); }
#status.running { color: var(--accent); font-weight: 600; }

#out {
  flex: 1;
  min-height: 320px;
  max-height: 72vh;
  overflow: auto;
  padding: 14px;
  font: .9375rem/1.55 var(--mono);
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--out-bg);
  -webkit-overflow-scrolling: touch;
}
#out.latex { font-family: var(--sans); font-size: 1.02rem; }
#out .katex { color: var(--text); font-size: 1.12em; }
#out .katex-display { margin: .8em 0; overflow-x: auto; overflow-y: hidden; }
#out .placeholder { color: var(--muted); }

details { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; }
summary { padding: 12px 14px; cursor: pointer; font-weight: 600; user-select: none; }
.settings { display: grid; gap: 12px; padding: 0 14px 14px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.settings > div:not(.wide) { display: grid; gap: 4px; }
.settings .wide { grid-column: 1 / -1; }
.hint { font-size: .8125rem; color: var(--muted); margin: 0; line-height: 1.5; }

/* Modals / Dialogs */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 1000;
}
.modal-backdrop[hidden] { display: none; }
.modal {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  width: 100%;
  max-width: 640px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 20px 40px rgba(0,0,0,0.45);
  display: flex;
  flex-direction: column;
  -webkit-overflow-scrolling: touch;
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--line);
}
.modal-header h3 { margin: 0; font-size: 1.05rem; font-weight: 650; }
.modal-body { padding: 16px 18px; display: flex; flex-direction: column; gap: 14px; }
.modal-footer {
  padding: 12px 18px;
  background: var(--panel-2);
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}
.cmd-block {
  background: var(--out-bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: .875rem;
  overflow-x: auto;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.cmd-block code {
  white-space: pre-wrap;
  word-break: break-all;
}
.cmd-block button {
  flex-shrink: 0;
  min-height: 32px;
  padding: 4px 10px;
  font-size: .8rem;
}

.scour-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 9999px;
  padding: 3px 10px;
  font-size: .8125rem;
  font-weight: 500;
  color: var(--text);
}
.scour-chip button {
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: .85rem;
  line-height: 1;
  padding: 0;
  min-height: auto;
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}
.scour-chip button:hover {
  color: var(--bad);
  background: rgba(239, 68, 68, 0.15);
}

footer {
  padding: 24px 12px 12px;
  font-size: .85rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
  margin-top: 24px;
}
footer p { margin: 0 0 6px; }
a { color: var(--accent); text-decoration-thickness: 1px; }
code { font-family: var(--mono); background: var(--panel-2); padding: 1px 5px; border-radius: 4px; font-size: .9em; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

/* Responsive layout */
@media (min-width: 960px) {
  main { grid-template-columns: 1fr 1fr; }
  details { grid-column: 1 / -1; }
  .mobile-tabs { display: none !important; }
  .panel { display: flex !important; }
}
@media (max-width: 959px) {
  .mobile-tabs { display: grid; }
  .panel.mobile-hidden { display: none; }
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* ---- Classes that replace inline styles generated from JS ---- */
.hidden-panel { display: none; }
.link-button { background: none; border: none; color: var(--accent); text-decoration: underline; cursor: pointer; font-size: inherit; padding: 0; }
.logo-slot { width: 50px; height: 50px; display: flex; align-items: center; justify-content: center; }
button.scour-chip { cursor: pointer; }
.scour-chip.is-selected { border-color: var(--accent); background: rgba(34, 197, 94, 0.15); color: var(--accent); font-weight: 650; }
.scour-chip.small { font-size: .78rem; }
.scour-empty { color: var(--muted); font-size: .8rem; }
#fetchArxivBtn:disabled { opacity: .55; cursor: not-allowed; }
.spinner { display: inline-block; width: 12px; height: 12px; border: 2px solid currentColor; border-top-color: transparent; border-radius: 50%; animation: spin .7s linear infinite; vertical-align: middle; }
.notice-box { padding: 10px; background: var(--panel-2); border: 1px solid var(--line); border-radius: 6px; }
.notice-box .lead { color: var(--text); font-size: .85rem; font-weight: 600; margin-bottom: 4px; }
.notice-box .sub { color: var(--muted); font-size: .8rem; margin-bottom: 8px; }
.notice-box.bad { color: var(--bad); }
.link-row { display: flex; flex-wrap: wrap; gap: 8px; }
.link-row a { text-decoration: none; display: inline-flex; align-items: center; }
.loading-line { display: flex; align-items: center; gap: 8px; color: var(--accent); padding: 4px 0; }
.paper-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.paper-source { font-size: .78rem; font-weight: 600; color: var(--accent); text-transform: uppercase; letter-spacing: .04em; }
.paper-head a { font-size: .78rem; color: var(--muted); text-decoration: none; }
.paper-list { display: grid; gap: 10px; }
.paper { border-bottom: 1px solid var(--line); padding-bottom: 8px; }
.paper-title { font-weight: 600; font-size: .88rem; color: var(--accent); text-decoration: none; display: block; line-height: 1.35; margin-bottom: 2px; }
.paper-meta { color: var(--muted); font-size: .78rem; margin: 2px 0; }
.paper-summary { color: var(--text); font-size: .8rem; line-height: 1.4; opacity: .9; }
.logo-choice-card { display: flex; flex-direction: column; align-items: center; text-align: center; justify-content: space-between; height: 100%; padding: 12px 10px; border-radius: 8px; border: 2px solid var(--line); background: var(--bg); cursor: pointer; min-height: auto; transition: border-color .15s, transform .15s; }
.logo-choice-card.is-active { border-color: var(--accent); background: var(--panel-2); }
.logo-choice-card .art { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; margin-bottom: 8px; }
.logo-choice-card .name { font-weight: 700; font-size: .82rem; color: var(--text); margin-bottom: 4px; line-height: 1.25; }
.logo-choice-card.is-active .name { color: var(--accent); }
.logo-choice-card .sub { font-size: .72rem; color: var(--muted); line-height: 1.35; margin-bottom: 10px; }
.logo-choice-card .pick { margin-top: auto; font-size: .72rem; font-weight: 600; padding: 3px 10px; border-radius: 12px; color: var(--muted); border: 1px solid var(--line); }
.logo-choice-card.is-active .pick { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }