/* diagnostic — Assessment Console (vocab placement) */

:root {
  --diag-navy: #07192f;
  --diag-navy-2: #102a4c;
  --diag-ink: #1a2332;
  --diag-muted: #5c6b7a;
  --diag-line: #d7dde5;
  --diag-paper: #ffffff;
  --diag-stage: #eef2f6;
  --diag-gold: #c7a45d;
  --diag-ok: #1f6b45;
  --diag-ok-bg: #e8f5ee;
  --diag-bad: #a33b2d;
  --diag-bad-bg: #f8ecea;
  --diag-font: "IBM Plex Sans", "Noto Sans SC", "PingFang SC", "Helvetica Neue", sans-serif;
}

/* —— Exam shell —— */
.diag-page {
  margin: 0;
  min-height: 100vh;
  background: var(--diag-stage);
  color: var(--diag-ink);
  font-family: var(--diag-font);
}

.diag-exam-bar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 56px;
  padding: 0 20px;
  background: var(--diag-navy);
  color: #f3f6fa;
  border-bottom: 2px solid var(--diag-gold);
}

.diag-exam-bar__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.diag-exam-bar__brand img {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  filter: brightness(1.05);
}

.diag-exam-bar__titles {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  min-width: 0;
}

.diag-exam-bar__titles strong {
  font-size: 0.92rem;
  font-weight: 650;
  letter-spacing: 0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.diag-exam-bar__titles span {
  font-size: 0.68rem;
  color: rgba(243, 246, 250, 0.62);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.diag-exam-bar__center {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
}

.diag-exam-bar__center[hidden] { display: none !important; }

.diag-hud-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.06);
}

.diag-hud-chip b { font-weight: 650; color: #fff; }
.diag-hud-chip em {
  font-style: normal;
  color: rgba(243, 246, 250, 0.55);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.diag-exam-exit {
  color: rgba(243, 246, 250, 0.78);
  text-decoration: none;
  font-size: 0.82rem;
  border: 1px solid rgba(255, 255, 255, 0.22);
  padding: 6px 12px;
  border-radius: 2px;
}

.diag-exam-exit:hover { color: #fff; border-color: rgba(255, 255, 255, 0.45); }

.diag-page.is-diag-session .diag-exam-exit { display: none; }

.diag-exam-main {
  max-width: 760px;
  margin: 0 auto;
  padding: 28px 16px 48px;
}

.diag-page.is-diag-session .diag-exam-main {
  max-width: 720px;
  padding-bottom: 48px;
}

/* —— Briefing / shared card —— */
.diag-brief,
.diag-card {
  background: var(--diag-paper);
  border: 1px solid var(--diag-line);
  border-radius: 2px;
  padding: 32px 28px;
  box-shadow: 0 1px 0 rgba(7, 25, 47, 0.04);
}

.diag-kicker {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--diag-gold);
  margin: 0 0 10px;
}

.diag-brief h1,
.diag-card h1 {
  font-family: var(--diag-font);
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--diag-navy);
  letter-spacing: -0.02em;
  margin: 0 0 10px;
  line-height: 1.25;
}

.diag-lead {
  color: var(--diag-muted);
  font-size: 0.95rem;
  line-height: 1.65;
  margin: 0 0 18px;
}

.diag-lead--gate strong { color: var(--diag-navy); }

.diag-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
}

.diag-meta-pill {
  font-size: 0.78rem;
  font-weight: 550;
  color: var(--diag-navy-2);
  background: #f2f5f8;
  border: 1px solid var(--diag-line);
  padding: 5px 10px;
  border-radius: 2px;
}

.diag-rules {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  border-top: 1px solid var(--diag-line);
}

.diag-rules li {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--diag-line);
  font-size: 0.9rem;
  color: var(--diag-ink);
  line-height: 1.5;
}

.diag-rules li span {
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--diag-muted);
  padding-top: 2px;
}

.diag-rules strong { color: var(--diag-navy); font-weight: 650; }

.diag-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.diag-actions .btn,
.diag-session__dock .btn {
  border-radius: 2px;
  min-height: 42px;
  padding: 0 18px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.diag-actions .btn--primary,
.diag-session__dock .btn--primary {
  background: var(--diag-navy);
  border-color: var(--diag-navy);
}

.diag-actions .btn--primary:hover,
.diag-session__dock .btn--primary:hover {
  background: var(--diag-navy-2);
}

.diag-actions .btn--ghost,
.diag-session__dock .btn--ghost {
  background: #fff;
  border: 1px solid var(--diag-line);
  color: var(--diag-navy);
}

/* —— Live session —— */
.diag-session {
  animation: diag-fade 0.18s ease both;
}

@keyframes diag-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

.diag-session__progress {
  height: 3px;
  background: #dfe5ec;
  margin: 0 0 18px;
  overflow: hidden;
}

.diag-session__progress > i {
  display: block;
  height: 100%;
  background: var(--diag-gold);
  transition: width 0.25s ease;
}

.diag-session__paper {
  background: var(--diag-paper);
  border: 1px solid var(--diag-line);
  border-radius: 2px;
  padding: 28px 26px 24px;
}

.diag-session__dock {
  margin-top: 12px;
  background: var(--diag-paper);
  border: 1px solid var(--diag-line);
  border-radius: 2px;
  padding: 12px 14px;
}

.diag-session__dock-inner {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.diag-qtype {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--diag-navy);
  background: #f2f5f8;
  border: 1px solid var(--diag-line);
  padding: 4px 10px;
  border-radius: 2px;
  margin-bottom: 18px;
}

.diag-qtype::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--diag-gold);
}

.diag-prompt {
  font-family: var(--diag-font);
  font-size: 1.75rem;
  font-weight: 650;
  color: var(--diag-navy);
  margin: 4px 0 8px;
  letter-spacing: -0.02em;
  word-break: break-word;
  line-height: 1.3;
}

.diag-prompt--cn {
  font-size: 1.35rem;
  font-weight: 600;
}

.diag-ipa {
  color: var(--diag-muted);
  font-size: 1.05rem;
  margin: 0 0 12px;
  font-family: "IBM Plex Sans", ui-monospace, monospace;
}

.diag-example {
  background: #f7f9fb;
  border: 1px solid var(--diag-line);
  border-left: 3px solid var(--diag-navy);
  padding: 12px 14px;
  border-radius: 0;
  font-size: 0.98rem;
  color: #334155;
  margin: 8px 0 12px;
  line-height: 1.6;
}

.diag-hint {
  font-size: 0.8rem;
  color: var(--diag-muted);
  margin: 0 0 14px;
}

.diag-listen {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 8px;
}

.diag-play {
  width: 56px;
  height: 56px;
  border-radius: 2px;
  border: 1px solid var(--diag-navy);
  cursor: pointer;
  background: var(--diag-navy);
  color: #fff;
  font-size: 1.1rem;
  letter-spacing: 0;
}

.diag-play:hover { background: var(--diag-navy-2); }

.diag-options {
  display: grid;
  gap: 8px;
  margin: 8px 0 4px;
  padding-bottom: 12px;
}

.diag-opt {
  display: grid;
  grid-template-columns: 28px 1fr;
  align-items: center;
  gap: 12px;
  text-align: left;
  padding: 12px 14px;
  border: 1px solid var(--diag-line);
  border-radius: 2px;
  background: #fff;
  cursor: pointer;
  font-size: 1rem;
  color: var(--diag-ink);
  transition: border-color 0.12s, background 0.12s;
}

.diag-opt__key {
  width: 28px;
  height: 28px;
  border: 1px solid var(--diag-line);
  border-radius: 2px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--diag-muted);
  background: #f7f9fb;
}

.diag-opt:hover:not(:disabled) { border-color: #9aa8b8; }
.diag-opt.is-selected {
  border-color: var(--diag-navy);
  background: #f3f6fa;
}
.diag-opt.is-selected .diag-opt__key {
  background: var(--diag-navy);
  border-color: var(--diag-navy);
  color: #fff;
}
.diag-opt.is-correct {
  border-color: var(--diag-ok);
  background: var(--diag-ok-bg);
}
.diag-opt.is-wrong {
  border-color: var(--diag-bad);
  background: var(--diag-bad-bg);
}
.diag-opt:disabled { cursor: default; }

.diag-input {
  width: 100%;
  box-sizing: border-box;
  padding: 14px 14px;
  border: 1px solid var(--diag-line);
  border-radius: 2px;
  font-size: 1.15rem;
  font-family: var(--diag-font);
  background: #fff;
  margin: 4px 0 8px;
  letter-spacing: 0.02em;
}

.diag-input:focus {
  outline: none;
  border-color: var(--diag-navy);
  box-shadow: 0 0 0 3px rgba(7, 25, 47, 0.08);
}

.diag-feedback {
  margin: 14px 0 0;
  padding: 10px 12px;
  border-radius: 2px;
  font-size: 0.9rem;
  line-height: 1.55;
  display: none;
  border: 1px solid transparent;
}

.diag-feedback.is-visible { display: block; }
.diag-feedback.is-ok {
  background: var(--diag-ok-bg);
  color: var(--diag-ok);
  border-color: #c6e2d2;
}
.diag-feedback.is-bad {
  background: var(--diag-bad-bg);
  color: var(--diag-bad);
  border-color: #ecc8c2;
}

.diag-early-abort {
  margin-top: 6px;
  font-weight: 650;
}

.diag-msg {
  color: var(--diag-bad);
  font-size: 0.9rem;
  margin-top: 10px;
}

/* —— Stage / complete —— */
.diag-stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 18px 0;
}

.diag-stat {
  background: #f7f9fb;
  border: 1px solid var(--diag-line);
  border-radius: 2px;
  padding: 14px 10px;
  text-align: center;
}

.diag-stat__val {
  font-family: var(--diag-font);
  font-size: 1.45rem;
  color: var(--diag-navy);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.diag-stat__lbl {
  font-size: 0.72rem;
  color: var(--diag-muted);
  margin-top: 4px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.diag-rating {
  display: inline-block;
  margin-top: 4px;
  font-weight: 700;
  font-size: 0.92rem;
  padding: 4px 10px;
  border: 1px solid var(--diag-line);
  border-radius: 2px;
  background: #f7f9fb;
}

.diag-rating--excellent { color: #8a6a20; border-color: #e4d4a8; background: #fbf6e9; }
.diag-rating--good { color: var(--diag-ok); border-color: #c6e2d2; background: var(--diag-ok-bg); }
.diag-rating--weak { color: var(--diag-bad); border-color: #ecc8c2; background: var(--diag-bad-bg); }

.diag-section-break {
  text-align: center;
  padding: 8px 0 4px;
}

.diag-section-break .diag-kicker { margin-bottom: 6px; }

/* —— Shared (report / mistakes / teacher) —— */
.diag-card--wide { max-width: 920px; margin-left: auto; margin-right: auto; }
.diag-h2 {
  font-family: var(--diag-font);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--diag-navy);
  margin: 0 0 8px;
}
.diag-h3 {
  font-size: 0.95rem;
  color: var(--diag-navy);
  margin: 16px 0 8px;
}
.diag-thermo { margin: 16px 0 8px; }
.diag-thermo__label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  margin-bottom: 6px;
  color: #444;
}
.diag-thermo__track {
  position: relative;
  height: 10px;
  background: #e5eaf0;
  border-radius: 2px;
  overflow: visible;
}
.diag-thermo__fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.35s ease;
}
.diag-thermo__fill--excellent { background: var(--diag-gold); }
.diag-thermo__fill--good { background: var(--diag-ok); }
.diag-thermo__fill--weak { background: #c46a3a; }
.diag-thermo__ci {
  position: absolute;
  top: -3px;
  height: 16px;
  border: 2px solid rgba(7, 25, 47, 0.4);
  border-radius: 2px;
  background: transparent;
  pointer-events: none;
}
.diag-advice {
  background: #f7f9fb;
  border: 1px solid var(--diag-line);
  border-radius: 2px;
  padding: 16px;
  font-size: 0.95rem;
  line-height: 1.65;
  color: #333;
  margin: 16px 0;
}
.diag-mistakes-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 16px;
}
.diag-mistakes-toolbar select {
  padding: 8px 10px;
  border-radius: 2px;
  border: 1px solid var(--diag-line);
  background: #fff;
  font-family: var(--diag-font);
}
.diag-mist-list { list-style: none; padding: 0; margin: 0; }
.diag-mist-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px 14px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--diag-line);
}
.diag-mist-list .diag-ua { color: var(--diag-bad); }
.diag-mist-list .diag-ca { color: var(--diag-ok); }
.diag-mist-meta { font-size: 0.8rem; color: var(--diag-muted); }
.diag-table-wrap { overflow-x: auto; }
.diag-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.diag-table th,
.diag-table td {
  padding: 10px 8px;
  border-bottom: 1px solid var(--diag-line);
  text-align: left;
  white-space: nowrap;
}
.diag-table th {
  background: #f7f9fb;
  color: var(--diag-navy);
  font-weight: 650;
}
.diag-table tr.is-alert { background: var(--diag-bad-bg); }
.diag-table a {
  color: var(--diag-navy);
  font-weight: 600;
  text-decoration: none;
}
.diag-table a:hover { text-decoration: underline; }
.diag-chart { margin: 12px 0 4px; }
.diag-chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 8px;
  font-size: 0.8rem;
  color: #555;
}
.diag-chart-legend__i { display: inline-flex; align-items: center; gap: 6px; }
.diag-chart-legend__i i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}
.diag-radar {
  max-width: 280px;
  margin: 8px auto 16px;
}
.diag-report-radar { margin: 8px 0 20px; text-align: center; }
.diag-timeline__item {
  border: 1px solid var(--diag-line);
  border-radius: 2px;
  padding: 0;
  margin: 0 0 10px;
  background: #fff;
}
.diag-timeline__item summary {
  cursor: pointer;
  padding: 12px 14px;
  font-weight: 650;
  color: var(--diag-navy);
  list-style: none;
}
.diag-timeline__item summary::-webkit-details-marker { display: none; }
.diag-timeline__body { padding: 0 14px 14px; }
.diag-hot-list { list-style: none; padding: 0; margin: 0; }
.diag-hot-list li {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--diag-line);
}
.diag-hot-list__rank {
  font-weight: 700;
  color: var(--diag-gold);
}
.diag-hot-list__main strong { color: var(--diag-navy); }
.diag-hot-list__bar {
  height: 6px;
  background: #e5eaf0;
  border-radius: 2px;
  margin-top: 6px;
  overflow: hidden;
}
.diag-hot-list__bar i {
  display: block;
  height: 100%;
  background: var(--diag-navy);
  border-radius: 2px;
}
.diag-hot-list__cnt {
  font-weight: 700;
  color: var(--diag-navy);
  min-width: 2ch;
  text-align: right;
}

/* Pages that still use site chrome (report / mistakes / teacher) */
.home-minimal .diag-card {
  max-width: 720px;
  margin: 0 auto;
}
.home-minimal .diag-card--wide { max-width: 920px; }

@media (max-width: 720px) {
  .diag-exam-bar { padding: 8px 12px; flex-wrap: wrap; }
  .diag-exam-bar__center {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 4px;
  }
  .diag-rules li { grid-template-columns: 1fr; gap: 4px; }
  .diag-stat-grid { grid-template-columns: 1fr; }
  .diag-prompt { font-size: 1.4rem; }
  .diag-brief,
  .diag-card,
  .diag-session__paper { padding: 22px 16px; }
}