:root {
  color-scheme: light;
  --bg: #f6f7fb;
  --card: #fff;
  --text: #111;
  --muted: #5f6570;
  --accent: #2d2f35;
  --accent-contrast: #fff;
  --border: #e3e6ed;
  --shadow: 0 10px 25px rgba(25, 29, 43, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero {
  background: linear-gradient(120deg, #1f2230, #2f3652);
  color: #fff;
  padding: 32px 0;
}

.hero__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: 26px;
}

.hero p {
  margin: 0;
}

.hero__meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.layout {
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
  padding: 24px 0 48px;
}

@media (max-width: 920px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.panel {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: flex-end;
  margin-bottom: 20px;
}

.panel__block {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 180px;
}

.panel__actions {
  margin-left: auto;
  flex-direction: row;
  align-items: center;
  gap: 10px;
}

.label {
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

select,
input[type="text"] {
  font: inherit;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
}

button {
  font: inherit;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.primary {
  background: var(--accent);
  color: var(--accent-contrast);
  border-color: var(--accent);
}

.ghost {
  background: #f3f4f7;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.16);
  font-size: 12px;
  color: #fff;
}

.pill.muted {
  background: #eef1f7;
  color: var(--muted);
  border-color: #e1e4ef;
}

.task-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.task-header {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.task-text {
  font-size: 20px;
  margin: 0;
  line-height: 1.4;
}

#taskImage {
  max-width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.answer-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.answer-row input {
  flex: 1;
  min-width: 180px;
}

.hint-block {
  border: 1px dashed var(--border);
  border-radius: 12px;
  padding: 12px;
  background: #fafbff;
}

.hint-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.hint-list {
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.result-block {
  border-top: 1px solid var(--border);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.result-line {
  font-size: 15px;
}

.solution-block {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  background: #f4f6fb;
  border: 1px solid var(--border);
}

.solution-block ol {
  margin: 8px 0 0;
  padding-left: 18px;
}

.stats-card h2 {
  margin-top: 0;
}

.stats-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.stat-label {
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-value {
  font-size: 20px;
  font-weight: 600;
}

.stat-types {
  margin-top: 20px;
}

.stat-types h3 {
  margin: 0 0 10px;
  font-size: 16px;
}

.stat-types ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.stat-types li {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  color: var(--muted);
}

.muted {
  color: var(--muted);
}