:root {
  --bg: #f4f7f4;
  --card: #fff;
  --ink: #1a2e1a;
  --muted: #5a6b5a;
  --accent: #2d8a4e;
  --accent-dark: #1f6b3a;
  --warn: #c45c26;
  --bad: #b42318;
  --ok: #1a7f37;
  --border: #d0ddd4;
  --radius: 14px;
  --tap: 48px;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html.mrj-auth-locked #mrj-app-root {
  visibility: hidden;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.45;
}

.wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 1rem 1rem 3rem;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent-dark);
  flex: 1;
}

.student-pill {
  font-size: 0.9rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
}

h1 {
  font-size: 1.55rem;
  margin: 0 0 0.35rem;
}

.lead {
  color: var(--muted);
  margin: 0 0 1rem;
}

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  margin-bottom: 1rem;
}

label.field-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

select,
input[type="text"] {
  font-size: 1.05rem;
  min-height: var(--tap);
  padding: 0.5rem 0.75rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  width: 100%;
}

select:disabled {
  opacity: 0.55;
}

.grid-2 {
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

.exercise-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin-top: 0.75rem;
}

.exercise-btn {
  display: block;
  text-align: left;
  text-decoration: none;
  color: inherit;
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  min-height: var(--tap);
  font-size: 1.05rem;
  cursor: pointer;
}

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

.exercise-btn:disabled,
.exercise-btn.disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.exercise-btn .hint {
  display: block;
  font-size: 0.88rem;
  color: var(--muted);
  margin-top: 0.15rem;
}

.exercise-btn .retry-tag {
  color: var(--warn);
  font-weight: 600;
  font-size: 0.85rem;
}

.timer-bar {
  position: sticky;
  top: 0;
  z-index: 5;
  background: #e8f5ec;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.65rem 1rem;
  margin-bottom: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
}

.timer-bar.low {
  background: #fff3e8;
  color: var(--warn);
}

.intro-ko {
  font-size: 0.95rem;
  line-height: 1.45;
  color: var(--ink);
  margin: 0.35rem 0 0.75rem;
  padding: 0.65rem 0.85rem;
  background: #f3f8f4;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.section-intro-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.section-intro-cell {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.5rem;
  padding: 0.4rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  font-size: 0.88rem;
}

.section-intro-title {
  font-weight: 600;
  color: var(--accent-dark);
}

.section-banner {
  margin: 1.25rem 0 0.65rem;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius);
  border: 1px solid #c5dcc9;
  background: #eef6f0;
}

.section-banner-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem 0.65rem;
  margin-bottom: 0.35rem;
}

.section-banner-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--accent-dark);
}

.section-banner-instr {
  font-size: 0.92rem;
  line-height: 1.45;
  color: var(--ink);
  white-space: pre-line;
}

.mode-chip {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--muted);
  white-space: nowrap;
}

.q-card:first-of-type,
form > .section-banner:first-child {
  margin-top: 0;
}

form > .section-banner:first-child {
  margin-top: 0;
}

.q-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 0.85rem;
  background: #fafcfa;
}

.q-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.55rem;
  margin-bottom: 0.35rem;
}

.q-num {
  font-weight: 700;
  color: var(--accent-dark);
}

.q-note {
  font-size: 0.88rem;
  color: var(--accent-dark);
  margin-bottom: 0.45rem;
  font-weight: 600;
}

.example-card {
  background: #eceff1;
  border-color: #cfd8dc;
  opacity: 0.95;
}

.example-answer {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--muted);
  margin-top: 0.35rem;
}

.blank-slot {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex: 1;
  min-width: 100px;
}

.blank-num {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--muted);
  min-width: 1.1rem;
  text-align: center;
}

.result-section-line {
  line-height: 1.65;
  margin: 0.35rem 0;
}

.q-ko {
  font-size: 0.92rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.q-en {
  font-size: 1.05rem;
  white-space: pre-line;
  margin-bottom: 0.65rem;
}

.mc-options {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.mc-options label {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  min-height: var(--tap);
  padding: 0.45rem 0.65rem;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
}

.mc-options label:hover {
  background: #eef6f0;
}

.mc-options input {
  width: 1.2rem;
  height: 1.2rem;
}

.blank-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.blank-row input {
  flex: 1;
  min-width: 120px;
}

.word-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.75rem;
}

.word-bank span {
  background: #e8f5ec;
  border-radius: 8px;
  padding: 0.35rem 0.65rem;
  font-weight: 600;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1rem;
}

.btn {
  font-size: 1.05rem;
  min-height: var(--tap);
  padding: 0.55rem 1.25rem;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  font-weight: 600;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-dark);
}

.btn-secondary {
  background: var(--card);
  border: 2px solid var(--border);
  color: var(--ink);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.back-link {
  color: var(--accent-dark);
  text-decoration: none;
  font-weight: 600;
}

.result-panel {
  border-left: 4px solid var(--accent);
}

.result-panel.fail-retry {
  border-left-color: var(--warn);
}

.mark-ok {
  color: var(--ok);
  font-weight: 700;
}

.mark-bad {
  color: var(--bad);
  font-weight: 700;
}

.wrong-list {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
}

.wrong-review-wrap {
  margin: 1.25rem 0 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

.wrong-review-heading {
  font-size: 1.15rem;
  margin: 0 0 0.35rem;
  color: var(--bad);
}

.wrong-review-lead {
  font-size: 0.92rem;
  color: var(--muted);
  margin: 0 0 0.85rem;
}

.wrong-review-section {
  margin-bottom: 1.1rem;
}

.wrong-review-section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem 0.65rem;
  margin-bottom: 0.35rem;
}

.wrong-review-section-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--accent-dark);
}

.wrong-review-instr {
  font-size: 0.9rem;
  line-height: 1.45;
  color: var(--ink);
  white-space: pre-line;
  margin-bottom: 0.65rem;
  padding: 0.5rem 0.65rem;
  background: #f3f8f4;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.wrong-review-card {
  border: 1px solid #e8c4c0;
  border-left: 4px solid var(--bad);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  margin-bottom: 0.75rem;
  background: #fffafa;
}

.wrong-review-label {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--bad);
  margin-bottom: 0.35rem;
}

.wrong-review-answer {
  margin-top: 0.65rem;
  padding: 0.65rem 0.75rem;
  background: #fff;
  border-radius: 10px;
  border: 1px dashed #e0b4b0;
}

.wrong-review-answer-label {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--bad);
  margin-bottom: 0.25rem;
}

.wrong-review-answer-text {
  font-size: 1.05rem;
  font-weight: 600;
  word-break: break-word;
}

.wrong-review-blanks {
  margin: 0.25rem 0 0.35rem;
  padding-left: 1.1rem;
  font-size: 1.02rem;
  font-weight: 600;
}

.wrong-review-blanks li.blank-wrong {
  color: var(--bad);
}

.wrong-review-blanks li.blank-ok-part {
  color: var(--ink);
}

.wrong-review-warn {
  font-size: 0.88rem;
  color: var(--muted);
  margin: 0.35rem 0 0;
}

.wrong-review-reminder {
  margin-top: 0.65rem;
  padding-top: 0.55rem;
  border-top: 1px solid var(--border);
  font-size: 0.88rem;
}

.wrong-review-reminder-label {
  font-weight: 700;
  display: block;
  margin-bottom: 0.25rem;
  color: var(--accent-dark);
}

.wrong-review-reminder-text {
  white-space: pre-line;
  margin-top: 0.35rem;
  line-height: 1.45;
}

.note {
  font-size: 0.9rem;
  color: var(--muted);
}

.links-row {
  margin-top: 1rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.links-row a {
  color: var(--accent-dark);
  font-weight: 600;
}

.q-image {
  display: block;
  max-width: min(220px, 100%);
  height: auto;
  margin: 0.35rem 0 0.65rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
}

.match-wrap {
  margin-top: 0.35rem;
}

.match-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

.match-col-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.match-btn {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  width: 100%;
  min-height: var(--tap);
  margin-bottom: 0.45rem;
  padding: 0.55rem 0.65rem;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
}

.match-btn:active {
  transform: scale(0.98);
}

.match-btn.match-selected {
  border-color: var(--accent);
  background: #e8f5ec;
}

.match-btn.match-linked {
  border-color: #7cb88f;
  background: #f0faf3;
}

.match-badge {
  flex: 0 0 1.6rem;
  height: 1.6rem;
  line-height: 1.6rem;
  text-align: center;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
}

.match-hint {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0.35rem 0 0;
}