/* ---------- LeetCode practice page: layout ---------- */

.lc-layout {
  --lc-easy: #00af9b;
  --lc-medium: #ffa116;
  --lc-hard: #ef4743;
  display: grid;
  gap: 1.4rem;
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0.5rem 1rem 1.5rem;
}

.lc-header {
  display: grid;
  gap: 0.35rem;
}

.lc-header__kicker {
  margin: 0;
  color: var(--sec-text-color);
  font-size: 0.78rem;
  letter-spacing: 0.28em;
}

.lc-header__intro {
  margin: 0;
  color: var(--text-color);
  font-size: 1rem;
  line-height: 1.75;
}

/* ---------- Stats ---------- */

.lc-stats {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.75rem;
}

.lc-stat {
  --lc-accent: var(--sec-text-color);
  display: grid;
  gap: 0.15rem;
  padding: 0.85rem 1rem;
  text-align: center;
  color: inherit;
  font: inherit;
  border: 1px solid var(--line-color);
  border-radius: 14px;
  background: var(--board-color);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

/* 难度筛选做在统计卡上，总提交那张不是按钮、不可点。 */
button.lc-stat {
  cursor: pointer;
}

button.lc-stat:hover,
button.lc-stat.is-active {
  border-color: var(--lc-accent);
}

button.lc-stat:hover {
  transform: translateY(-2px);
}

button.lc-stat:focus-visible {
  outline: 2px solid var(--lc-accent);
  outline-offset: 2px;
}

.lc-stat--total {
  --lc-accent: var(--text-color);
}

.lc-stat--easy {
  --lc-accent: var(--lc-easy);
}

.lc-stat--medium {
  --lc-accent: var(--lc-medium);
}

.lc-stat--hard {
  --lc-accent: var(--lc-hard);
}

.lc-stat__value {
  color: var(--text-color);
  font-size: 1.45rem;
  font-weight: 600;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.lc-stat__label {
  color: var(--sec-text-color);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
}

.lc-stat--easy .lc-stat__value {
  color: var(--lc-easy);
}

.lc-stat--medium .lc-stat__value {
  color: var(--lc-medium);
}

.lc-stat--hard .lc-stat__value {
  color: var(--lc-hard);
}

/* ---------- Toolbar ---------- */

.lc-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.lc-search {
  display: inline-flex;
  gap: 0.5rem;
  align-items: center;
  min-width: 220px;
  margin-left: auto;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--line-color);
  border-radius: 999px;
  background: transparent;
  transition: border-color 0.2s ease;
}

.lc-search:focus-within {
  border-color: var(--sec-text-color);
}

.lc-search__icon {
  color: var(--sec-text-color);
  font-size: 0.95rem;
}

.lc-search input {
  width: 100%;
  color: var(--text-color);
  font: inherit;
  font-size: 0.86rem;
  border: 0;
  outline: none;
  background: transparent;
}

.lc-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.lc-tag-chip {
  padding: 0.28rem 0.7rem;
  color: var(--sec-text-color);
  font: inherit;
  font-size: 0.78rem;
  border: 1px dashed var(--line-color);
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.lc-tag-chip em {
  color: inherit;
  font-style: normal;
  opacity: 0.65;
}

.lc-tag-chip:hover,
.lc-tag-chip.is-active {
  color: var(--text-color);
  border-color: var(--sec-text-color);
  border-style: solid;
}

/* ---------- Problem list ---------- */

.lc-list {
  display: grid;
  gap: 0.7rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.lc-item {
  display: grid;
  grid-template-columns: 3.4rem minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: start;
  padding: 1rem 1.15rem;
  border: 1px solid var(--line-color);
  border-radius: 14px;
  background: var(--board-color);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.lc-item:hover {
  border-color: var(--sec-text-color);
  transform: translateY(-2px);
}

.lc-item[hidden] {
  display: none;
}

.lc-item__id {
  color: var(--sec-text-color);
  font-size: 1rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  padding-top: 0.1rem;
}

.lc-item__main {
  display: grid;
  gap: 0.4rem;
  min-width: 0;
}

.lc-item__head {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.lc-item__check {
  color: var(--lc-easy);
  font-size: 0.9rem;
}

.lc-item__title {
  color: var(--text-color);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
}

.lc-item__title:hover {
  color: var(--post-link-color);
}

.lc-badge {
  padding: 0.1rem 0.5rem;
  font-size: 0.72rem;
  border-radius: 999px;
  border: 1px solid currentcolor;
}

.lc-badge--easy {
  color: var(--lc-easy);
}

.lc-badge--medium {
  color: var(--lc-medium);
}

.lc-badge--hard {
  color: var(--lc-hard);
}

.lc-item__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.lc-tag {
  padding: 0.1rem 0.5rem;
  color: var(--sec-text-color);
  font-size: 0.74rem;
  border-radius: 6px;
  background: var(--board-bg-color);
}

.lc-item__note {
  margin: 0;
  color: var(--sec-text-color);
  font-size: 0.86rem;
  line-height: 1.65;
}

.lc-item__side {
  display: grid;
  gap: 0.2rem;
  justify-items: end;
  color: var(--sec-text-color);
  font-size: 0.78rem;
  white-space: nowrap;
}

.lc-item__submissions {
  opacity: 0.75;
}

.lc-empty,
.lc-count {
  margin: 0;
  color: var(--sec-text-color);
  font-size: 0.82rem;
  text-align: center;
}

.lc-empty {
  padding: 2rem 0;
}

/* ---------- Responsive & dark mode ---------- */

@media (max-width: 640px) {
  .lc-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lc-item {
    grid-template-columns: 2.4rem minmax(0, 1fr);
  }

  .lc-item__side {
    grid-column: 2;
    justify-items: start;
    grid-auto-flow: column;
    gap: 0.6rem;
  }
}

html[data-user-color-scheme="dark"] .lc-tag {
  background: var(--board-bg-color);
}