[hidden] { display: none !important; }

/* ---------- Tokens ---------- */
:root {
  /* Color */
  --bg: #f5f6fa;
  --surface: #ffffff;
  --surface-2: #eef1f7;
  --ink: #111827;
  --muted: #4b5563;
  --line: #dde2ec;
  --line-strong: #6b7385;
  --accent: #1d4ed8;
  --accent-hover: #1e40af;
  --accent-ink: #ffffff;
  --accent-soft: #e8eefc;
  --bad: #b42318;
  --bad-soft: #fef3f2;
  --warn: #8a4b06;
  --warn-soft: #fff6e5;
  --good: #067647;
  --good-soft: #ecfdf3;
  --focus: #b45309;
  --x-bg: #000000;
  --x-ink: #ffffff;
  /* Type scale, 1.125 steps from a 16px base */
  --fs-xs: 0.8125rem;
  --fs-sm: 0.9375rem;
  --fs-md: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.375rem;
  --fs-2xl: 1.75rem;
  --lh-tight: 1.25;
  --lh-body: 1.55;
  /* Shape and spacing */
  --radius: 16px;
  --radius-sm: 10px;
  --tap: 44px;
  --shadow: 0 1px 2px rgb(16 24 40 / 0.05), 0 10px 30px rgb(16 24 40 / 0.07);
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1020;
    --surface: #141a2e;
    --surface-2: #1c2440;
    --ink: #f3f4f6;
    --muted: #b4bccf;
    --line: #2c3555;
    --line-strong: #7f8bab;
    --accent: #8ea8ff;
    --accent-hover: #aabdff;
    --accent-ink: #0b1020;
    --accent-soft: #1f2a4d;
    --bad: #ff9b91;
    --bad-soft: #3a1717;
    --warn: #ffc56b;
    --warn-soft: #36290f;
    --good: #6ee7a8;
    --good-soft: #0f2e20;
    --focus: #fbbf24;
    --x-bg: #ffffff;
    --x-ink: #000000;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.4), 0 10px 30px rgb(0 0 0 / 0.35);
  }
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: var(--fs-md) / var(--lh-body) system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
}
.wrap { width: min(1120px, 100% - 32px); margin-inline: auto; }
.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; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); color: var(--ink); padding: 10px 14px; border-radius: 8px; z-index: 10; }
.skip:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
a { color: var(--accent); }
.muted { color: var(--muted); }
.small { font-size: var(--fs-xs); }
fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
legend { padding: 0; }

/* ---------- Header ---------- */
.site-header { padding: 14px 0 4px; }
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 10px; min-height: var(--tap); text-decoration: none; color: inherit; }
.brand img { border-radius: 8px; }
.brand-name { font-weight: 800; font-size: var(--fs-lg); letter-spacing: -0.01em; }
.brand-sub { margin: 0; color: var(--muted); font-size: var(--fs-sm); }
.title { font-size: var(--fs-2xl); line-height: var(--lh-tight); letter-spacing: -0.02em; margin: 10px 0 18px; font-weight: 800; }

/* ---------- Translator ---------- */
.translator { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }

.langbar { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; border-bottom: 1px solid var(--line); background: var(--surface); }
.lang { padding: 12px 20px; font-weight: 750; font-size: var(--fs-lg); text-align: center; }
.swap-btn {
  width: var(--tap); height: var(--tap); border-radius: 50%; border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink);
  display: grid; place-items: center; cursor: pointer; transition: transform 0.2s ease;
}
.swap-btn:hover { border-color: var(--accent); color: var(--accent); }
.swap-btn.spin { transform: rotate(180deg); }
@media (prefers-reduced-motion: reduce) { .swap-btn { transition: none; } }

.controls { display: flex; justify-content: space-between; align-items: flex-end; gap: 12px 20px; flex-wrap: wrap; padding: 14px 20px; border-bottom: 1px solid var(--line); background: var(--surface-2); }
.chips legend { font-weight: 700; font-size: var(--fs-sm); margin-bottom: 6px; }
.chip-row { display: flex; gap: 8px; flex-wrap: wrap; }
.chip-row input { position: absolute; opacity: 0; pointer-events: none; }
.chip-row label {
  display: inline-flex; align-items: center; min-height: var(--tap); padding: 0 16px; border-radius: 999px;
  border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink); font-weight: 650; font-size: var(--fs-sm); cursor: pointer; user-select: none;
}
.chip-row label:hover { border-color: var(--accent); }
.chip-row input:checked + label { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.chip-row input:focus-visible + label { outline: 3px solid var(--focus); outline-offset: 2px; }

.settings { position: relative; }
.settings summary {
  display: inline-flex; align-items: center; gap: 8px; min-height: var(--tap); padding: 0 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong); background: var(--surface); font-weight: 650; font-size: var(--fs-sm); cursor: pointer; list-style: none;
}
.settings summary::-webkit-details-marker { display: none; }
.settings[open] summary { border-color: var(--accent); }
.engine-badge { font-size: var(--fs-xs); font-weight: 700; padding: 2px 8px; border-radius: 999px; background: var(--accent-soft); color: var(--ink); }
.settings[open] > :not(summary) { margin-top: 10px; }
.settings .engine { display: grid; gap: 8px; width: min(420px, 100%); }
.settings .engine legend { font-weight: 700; font-size: var(--fs-sm); margin-bottom: 6px; }
.choice { display: flex; gap: 10px; align-items: flex-start; min-height: var(--tap); padding: 10px 12px; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); background: var(--surface); cursor: pointer; }
.choice:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.choice input { margin-top: 4px; width: 18px; height: 18px; accent-color: var(--accent); }
.choice .muted { display: block; font-size: var(--fs-xs); }
.ai-status { display: grid; gap: 6px; font-size: var(--fs-sm); width: min(420px, 100%); }
progress { width: 100%; height: 10px; accent-color: var(--accent); }

.panes { display: grid; grid-template-columns: 1fr 1fr; }
.pane { padding: 16px 20px 18px; display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.input-pane { border-right: 1px solid var(--line); }
.result-pane { background: var(--surface); }
.pane-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; min-height: var(--tap); }
.pane-head label, .pane-head h2 { font-weight: 700; font-size: var(--fs-sm); color: var(--muted); margin: 0; }
.pane-tools { display: flex; gap: 4px; }
.text-btn {
  min-height: var(--tap); padding: 0 10px; border: 0; border-radius: var(--radius-sm); background: none; color: var(--accent);
  font: inherit; font-size: var(--fs-sm); font-weight: 650; cursor: pointer;
}
.text-btn:hover { background: var(--accent-soft); }

.input-wrap { position: relative; }
textarea {
  display: block; width: 100%; resize: vertical; min-height: 240px; padding: 12px 56px 12px 14px;
  font: inherit; font-size: var(--fs-lg); line-height: 1.5; color: inherit; background: var(--bg);
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
}
textarea::placeholder { color: var(--muted); opacity: 1; }
textarea:focus { border-color: var(--accent); }
.mic {
  position: absolute; right: 8px; top: 8px; width: var(--tap); height: var(--tap); border-radius: 50%;
  border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink); cursor: pointer; display: grid; place-items: center;
}
.mic[aria-pressed="true"] { background: #c0263f; border-color: #c0263f; color: #fff; animation: pulse 1.4s ease-in-out infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 8px rgb(192 38 63 / 0.18); } }
@media (prefers-reduced-motion: reduce) { .mic[aria-pressed="true"] { animation: none; } }

.pane-foot { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.pane-foot .btn.primary { margin-left: auto; }

.btn {
  appearance: none; display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: var(--tap); padding: 0 18px;
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm); background: var(--surface); color: var(--ink);
  font: inherit; font-size: var(--fs-sm); font-weight: 700; cursor: pointer; text-decoration: none;
}
.btn:hover { border-color: var(--accent); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); min-width: 148px; font-size: var(--fs-md); }
.btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn.x { background: var(--x-bg); color: var(--x-ink); border-color: var(--x-bg); }

/* ---------- Result ---------- */
.empty { margin: 0; padding: 24px 0; color: var(--muted); font-size: var(--fs-lg); }
#output:empty { display: none; }
.corporate-out { font-size: var(--fs-xl); line-height: 1.45; white-space: pre-wrap; margin: 0; overflow-wrap: anywhere; }
.signal {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px; margin: 0 0 10px; padding: 10px 14px; border-radius: var(--radius-sm);
  background: var(--surface-2); color: var(--ink); border-left: 4px solid var(--line-strong);
}
.signal-kicker { font-size: var(--fs-xs); font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; }
.signal strong { font-size: var(--fs-lg); }
.signal .also { font-size: var(--fs-xs); color: var(--ink); }
.signal[data-tone="bad"] { background: var(--bad-soft); border-left-color: var(--bad); }
.signal[data-tone="bad"] .signal-kicker, .signal[data-tone="bad"] strong { color: var(--bad); }
.signal[data-tone="warn"] { background: var(--warn-soft); border-left-color: var(--warn); }
.signal[data-tone="warn"] .signal-kicker, .signal[data-tone="warn"] strong { color: var(--warn); }
.signal[data-tone="good"] { background: var(--good-soft); border-left-color: var(--good); }
.signal[data-tone="good"] .signal-kicker, .signal[data-tone="good"] strong { color: var(--good); }
.summary { font-size: var(--fs-xl); line-height: 1.4; font-weight: 650; margin: 0 0 6px; }
.summary-kicker { display: block; font-size: var(--fs-xs); font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 2px; }
.lines { border-top: 1px solid var(--line); margin-top: 6px; padding-top: 4px; }
.lines summary { min-height: var(--tap); display: flex; align-items: center; font-weight: 700; font-size: var(--fs-sm); cursor: pointer; }
ol.decode { list-style: none; margin: 4px 0 0; padding: 0; display: grid; gap: 12px; }
ol.decode li { display: grid; gap: 4px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
ol.decode li:last-child { border-bottom: 0; padding-bottom: 0; }
ol.decode blockquote { margin: 0; padding: 8px 12px; background: var(--surface-2); border-left: 3px solid var(--line-strong); border-radius: 6px; color: var(--muted); font-size: var(--fs-sm); }
ol.decode p { margin: 0; font-weight: 650; }
ol.decode p::before { content: "Means: "; color: var(--warn); font-weight: 700; }
.pending { color: var(--muted); font-style: italic; }
.note { font-size: var(--fs-sm); color: var(--muted); margin: 0; }
.note.callout { color: var(--ink); background: var(--warn-soft); border-left: 4px solid var(--warn); padding: 8px 12px; border-radius: 6px; }
.result-tools { display: flex; gap: 8px; flex-wrap: wrap; margin-top: auto; padding-top: 6px; }

/* ---------- About and footer ---------- */
.about { margin: 28px auto; color: var(--muted); max-width: 760px; }
.about h2 { font-size: var(--fs-md); color: var(--ink); }
.site-footer { border-top: 1px solid var(--line); padding: 12px 0 28px; font-size: var(--fs-sm); }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 8px 12px; flex-wrap: wrap; align-items: center; }
.site-footer p { margin: 0; font-weight: 650; }
.site-footer nav { display: flex; gap: 4px 16px; flex-wrap: wrap; }
.site-footer nav a { display: inline-flex; align-items: center; min-height: var(--tap); }

dialog { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); color: var(--ink); max-width: min(460px, 100% - 32px); padding: 22px; }
dialog::backdrop { background: rgb(8 12 24 / 0.55); }
dialog h2 { margin-top: 0; font-size: var(--fs-xl); }
.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 16px; }

/* ---------- Small screens ---------- */
@media (max-width: 860px) {
  .panes { grid-template-columns: 1fr; }
  .input-pane { border-right: 0; border-bottom: 1px solid var(--line); }
}
@media (max-width: 560px) {
  .wrap { width: min(1120px, 100% - 24px); }
  .site-header { padding-top: 8px; }
  .brand-sub { display: none; }
  .title { font-size: var(--fs-xl); margin: 4px 0 12px; }
  .lang { padding: 8px 10px; font-size: var(--fs-md); }
  .controls { padding: 10px 14px; gap: 10px; }
  .chip-row { gap: 6px; }
  .chip-row label { padding: 0 12px; }
  .pane { padding: 10px 14px 14px; gap: 8px; }
  .pane-head { flex-wrap: nowrap; min-height: 0; }
  .pane-head label { font-size: var(--fs-xs); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .text-btn { padding: 0 8px; }
  textarea { min-height: 132px; font-size: var(--fs-md); }
  .kbd-hint { display: none; }
  .pane-foot .btn.primary { flex: 1 1 100%; order: -1; margin-left: 0; }
  .corporate-out, .summary { font-size: var(--fs-lg); }
  .result-tools .btn { flex: 1 1 auto; }
}