* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #0b1220;
  background: #f6f7fb;
  min-height: 100dvh;
  -webkit-text-size-adjust: 100%;
}

.hidden {
  display: none !important;
}

.app-header {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: calc(16px + env(safe-area-inset-top)) calc(16px + env(safe-area-inset-right)) 8px
    calc(16px + env(safe-area-inset-left));
  max-width: 1100px;
  margin: 0 auto;
}

.title h1 {
  margin: 0;
  font-size: 20px;
}

.subtitle {
  margin: 4px 0 0;
  font-size: 13px;
  color: #5b6477;
}

.badge {
  padding: 6px 10px;
  border-radius: 999px;
  background: #0b1220;
  color: #fff;
  font-size: 13px;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 8px calc(16px + env(safe-area-inset-right)) calc(24px + env(safe-area-inset-bottom))
    calc(16px + env(safe-area-inset-left));
}

.controls {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  padding: 10px;
  background: #ffffff;
  border: 1px solid #e7eaf2;
  border-radius: 12px;
}

.spacer {
  flex: 1;
}

button {
  appearance: none;
  border: 1px solid #d8deeb;
  background: #ffffff;
  color: #0b1220;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 14px;
  cursor: pointer;
}

button:hover {
  background: #f6f7fb;
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

button.primary {
  background: #0b1220;
  color: #ffffff;
  border-color: #0b1220;
}

button.primary:hover {
  background: #111a33;
}

button.ghost {
  background: transparent;
}

button.full {
  width: 100%;
}

.select-wrap {
  display: inline-flex;
  align-items: center;
}

select {
  appearance: none;
  border: 1px solid #d8deeb;
  background: #ffffff;
  color: #0b1220;
  padding: 10px 36px 10px 12px;
  border-radius: 10px;
  font-size: 14px;
  line-height: 1;
  background-image: linear-gradient(45deg, transparent 50%, #5b6477 50%),
    linear-gradient(135deg, #5b6477 50%, transparent 50%);
  background-position: calc(100% - 18px) 50%, calc(100% - 12px) 50%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}

select:hover {
  background-color: #f6f7fb;
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border: 1px solid #d8deeb;
  background: #ffffff;
  color: #0b1220;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 14px;
  cursor: pointer;
}

.button-link:hover {
  background: #f6f7fb;
}

.button-link.full {
  width: 100%;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.import-manage {
  border-top: 1px solid #eef1f7;
  padding-top: 12px;
}

.import-manage-list {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

.import-manage-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border: 1px solid #eef1f7;
  background: #ffffff;
  border-radius: 12px;
  padding: 10px;
}

.import-manage-meta {
  font-size: 13px;
  color: #0b1220;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.import-help {
  border-top: 1px solid #eef1f7;
  padding-top: 12px;
}

.import-help-title {
  font-weight: 900;
  font-size: 14px;
}

.import-help-text {
  margin-top: 4px;
  color: #5b6477;
  font-size: 13px;
}

.import-help-grid {
  margin-top: 10px;
  display: grid;
  gap: 10px;
}

.import-help-card {
  border: 1px solid #eef1f7;
  background: #fbfcff;
  border-radius: 12px;
  padding: 10px;
}

.import-help-card-title {
  font-weight: 800;
  font-size: 13px;
}

.import-help-card-sub {
  margin-top: 3px;
  color: #5b6477;
  font-size: 12px;
}

.import-help-code {
  margin: 8px 0 0;
  padding: 10px;
  border-radius: 10px;
  background: #0b1220;
  color: #eef1f7;
  font-size: 12px;
  line-height: 1.35;
  overflow: auto;
  white-space: pre;
}

.paper-wrap {
  padding-top: 14px;
  display: flex;
  justify-content: center;
}

.paper {
  width: min(92vw, 520px);
  height: calc(min(92vw, 520px) * 297 / 210);
  background: #fff;
  border: 1px solid #e1e5f0;
  border-radius: 14px;
  box-shadow: 0 12px 30px rgba(11, 18, 32, 0.08);
  position: relative;
  overflow: hidden;
}

.paper-inner {
  position: absolute;
  inset: 16px;
}

.paper-hint {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  color: #7a8398;
  font-size: 14px;
  text-align: center;
  pointer-events: none;
  padding: 0 12px;
}

.word-item {
  position: absolute;
  padding: 4px 6px;
  border-radius: 8px;
  background: rgba(11, 18, 32, 0.04);
  border: 1px solid rgba(11, 18, 32, 0.08);
  user-select: none;
  max-width: 70%;
  white-space: normal;
}

.word-term {
  display: block;
  font-weight: 600;
  letter-spacing: 0.2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.word-meaning {
  display: none;
  margin-top: 2px;
  color: #5b6477;
  font-weight: 500;
  font-size: 0.78em;
  line-height: 1.15;
  max-width: 18em;
  overflow: hidden;
  text-overflow: ellipsis;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.show-meaning .word-meaning {
  display: -webkit-box;
}

.modal.hidden {
  display: none;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 18px;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(11, 18, 32, 0.45);
}

.modal-panel {
  position: relative;
  width: min(92vw, 560px);
  max-height: min(80vh, 680px);
  background: #ffffff;
  border-radius: 14px;
  border: 1px solid #e7eaf2;
  box-shadow: 0 16px 50px rgba(11, 18, 32, 0.18);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 12px 12px 10px;
  border-bottom: 1px solid #eef1f7;
}

.modal-header h2 {
  margin: 0;
  font-size: 16px;
}

.modal-actions {
  display: flex;
  gap: 8px;
}

.modal-body {
  padding: 12px;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.review-meta {
  color: #5b6477;
  font-size: 13px;
}

.review-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.intro {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.intro-block {
  border: 1px solid #eef1f7;
  background: #fbfcff;
  border-radius: 12px;
  padding: 12px;
}

.intro-title {
  font-weight: 900;
  font-size: 14px;
}

.intro-list {
  margin: 8px 0 0;
  padding-left: 18px;
  color: #0b1220;
  font-size: 13px;
  line-height: 1.5;
}

.intro-list li {
  margin: 4px 0;
}

.intro-foot {
  color: #5b6477;
  font-size: 13px;
}

.review-item {
  padding: 10px;
  border: 1px solid #e7eaf2;
  border-radius: 12px;
  background: #fbfcff;
}

.review-item .t {
  font-weight: 700;
}

.review-item .m {
  margin-top: 4px;
  color: #5b6477;
  font-size: 13px;
}

@media (min-width: 920px) {
  .paper {
    width: min(60vw, 620px);
    height: calc(min(60vw, 620px) * 297 / 210);
  }

  .review-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.records {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.empty {
  border: 1px dashed #d8deeb;
  background: #ffffff;
  border-radius: 14px;
  padding: 18px;
  display: grid;
  gap: 10px;
  justify-items: start;
}

.empty-title {
  font-weight: 800;
}

.empty-sub {
  color: #5b6477;
  font-size: 13px;
}

.rounds {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.round-card {
  background: #ffffff;
  border: 1px solid #e7eaf2;
  border-radius: 14px;
  overflow: hidden;
}

.round-head {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  justify-content: space-between;
  padding: 12px;
  border-bottom: 1px solid #eef1f7;
}

.round-title {
  font-weight: 900;
}

.round-meta {
  margin-top: 4px;
  color: #5b6477;
  font-size: 13px;
}

.round-actions {
  display: flex;
  gap: 8px;
}

.round-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
  padding: 12px;
}

.section-title {
  font-weight: 800;
  font-size: 13px;
  color: #0b1220;
  margin-bottom: 8px;
}

.paper.paper-mini {
  width: min(92vw, 320px);
  height: calc(min(92vw, 320px) * 297 / 210);
  border-radius: 12px;
  box-shadow: none;
}

.words-list {
  display: grid;
  gap: 8px;
}

.word-row {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 10px;
  border: 1px solid #eef1f7;
  border-radius: 12px;
  padding: 10px;
  background: #fbfcff;
}

.word-row .w {
  font-weight: 800;
}

.word-row .m {
  color: #5b6477;
  font-size: 13px;
}

.words-empty {
  color: #5b6477;
  font-size: 13px;
}

@media (min-width: 920px) {
  .round-grid {
    grid-template-columns: 360px 1fr;
  }

  .paper.paper-mini {
    width: 320px;
    height: calc(320px * 297 / 210);
  }
}

@media print {
  body {
    background: #ffffff;
  }

  .no-print {
    display: none !important;
  }

  .round-card {
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .round-card:not(:last-child) {
    break-after: page;
    page-break-after: always;
  }
}