:root {
  --bg: #f6f7f7; --panel: #ffffff; --text: #1b1e20; --muted: #5d6469; --line: #e1e4e5; --line-strong: #cdd2d4;
  --accent: #0b6b5c; --accent-ink: #ffffff; --accent-soft: #e3f1ee; --accent-line: #b9ddd5; --warn: #c7832a; --track: #e9ecec;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif; font-size: 14px; line-height: 1.45;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111414; --panel: #191d1d; --text: #e6eaea; --muted: #9aa3a6; --line: #2a3031; --line-strong: #3a4243;
    --accent: #3fb8a1; --accent-ink: #0b1513; --accent-soft: #17302b; --accent-line: #2c5a51; --warn: #e0a24f; --track: #2a3031;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
a { color: var(--accent); }
button, .btn { font: inherit; cursor: pointer; border-radius: 7px; border: 1px solid var(--line-strong); background: var(--panel); color: var(--text); padding: 8px 14px; min-height: 40px; }
button:focus-visible, .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.muted { color: var(--muted); }

header.top { height: 56px; padding: 0 24px; background: var(--panel); border-bottom: 1px solid var(--line); display: flex; align-items: center; gap: 24px; position: sticky; top: 0; z-index: 2; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 15px; }
.brand i { width: 18px; height: 18px; border-radius: 5px; background: var(--accent); display: inline-block; }
header.top .who { margin-left: auto; display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 13px; }

.layout { display: flex; min-height: calc(100vh - 56px); }
aside { width: 260px; flex: none; padding: 24px 16px; border-right: 1px solid var(--line); background: var(--panel); display: flex; flex-direction: column; gap: 6px; }
aside .label { font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); padding: 0 10px 8px; }
aside button.q { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 10px; border: 1px solid transparent; background: transparent; text-align: left; min-height: 44px; }
aside button.q.on { border-color: var(--accent-line); background: var(--accent-soft); }
aside button.q .name { font-weight: 600; display: block; }
aside button.q .opts { font-size: 12px; color: var(--muted); display: block; }
.count { min-width: 26px; padding: 2px 8px; border-radius: 10px; background: var(--accent-soft); color: var(--accent); font-weight: 600; font-size: 12px; text-align: center; }
aside .help { margin-top: auto; padding: 12px 10px 0; border-top: 1px solid var(--line); font-size: 12px; color: var(--muted); }

main { flex: 1; min-width: 0; padding: 28px 40px 60px; display: flex; flex-direction: column; gap: 16px; }
.head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
h1 { margin: 0 0 4px; font-size: 22px; }
kbd { padding: 1px 6px; border: 1px solid var(--line-strong); border-radius: 4px; background: var(--panel); font: inherit; font-size: 12px; }
.try { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.try input { flex: 1 1 260px; min-width: 0; font: inherit; padding: 9px 12px; border-radius: 8px; border: 1px solid var(--line-strong); background: var(--panel); color: var(--text); min-height: 40px; }
.try input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.try-out { color: var(--muted); font-size: 13px; flex-basis: 100%; }
.try-out:empty { display: none; }
.toast { padding: 10px 14px; border-radius: 8px; background: var(--accent-soft); color: var(--text); font-weight: 500; }
.case { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 18px 20px; display: flex; flex-direction: column; gap: 14px; }
.case.current { border-color: var(--accent-line); }
.case p { margin: 0; font-size: 16px; white-space: pre-wrap; overflow-wrap: anywhere; }
.case .row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.meta { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.meta strong { color: var(--text); }
.bar { width: 64px; height: 6px; border-radius: 3px; background: var(--track); overflow: hidden; display: inline-block; }
.bar span { display: block; height: 6px; background: var(--warn); }
.bar span.high { background: var(--accent); }
.answers { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; }
.answers button { font-weight: 600; }
.answers button.guess { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.answers button .key { font-size: 11px; opacity: 0.7; margin-right: 4px; }
.answers button.discard { color: var(--muted); border-color: var(--line); font-weight: 400; }
.empty { padding: 48px; text-align: center; color: var(--muted); background: var(--panel); border: 1px dashed var(--line-strong); border-radius: 10px; }

.login { max-width: 380px; margin: 14vh auto; padding: 0 16px; display: flex; flex-direction: column; gap: 18px; }
.login .card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 28px; display: flex; flex-direction: column; gap: 14px; }
.login h1 { text-align: center; font-size: 18px; }
.login .brand { justify-content: center; font-size: 18px; }
a.signin { display: flex; align-items: center; justify-content: center; gap: 10px; min-height: 44px; border-radius: 8px; border: 1px solid var(--line-strong); background: var(--panel); color: var(--text); text-decoration: none; font-weight: 600; }
.error-msg { color: #c0392b; margin: 0; }
.note { text-align: center; font-size: 12px; color: var(--muted); margin: 0; }

@media (max-width: 760px) {
  header.top { padding: 0 16px; gap: 12px; }
  header.top .email { display: none; }
  .layout { flex-direction: column; }
  aside { width: auto; border-right: 0; border-bottom: 1px solid var(--line); padding: 12px 16px; flex-direction: row; overflow-x: auto; gap: 8px; }
  aside .label, aside .help { display: none; }
  aside button.q { width: auto; flex: none; border-color: var(--line); border-radius: 18px; }
  aside button.q .opts { display: none; }
  main { padding: 16px 16px 40px; }
  .answers { margin-left: 0; width: 100%; }
  .answers button { flex: 1 1 40%; min-height: 48px; }
}