:root {
  color-scheme: light;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f7f9fc;
  color: #102a43;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  line-height: 1.6;
}

.container {
  width: min(96%, 940px);
  margin: 0 auto;
}

header {
  background: #1f4e79;
  color: #fff;
  padding: 1.5rem 0;
}

header h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 2.5vw, 2.5rem);
}

header p {
  margin: 0;
  color: #dbe4ef;
}

main {
  padding: 2rem 0 3rem;
}

.panel {
  background: #ffffff;
  border: 1px solid #d8e1eb;
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
}

.panel-row {
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  margin-bottom: 1rem;
}

.date-controls {
  grid-template-columns: auto minmax(180px, 220px) auto;
  align-items: center;
}

.date-picker-wrap {
  display: grid;
  gap: 0.5rem;
  min-width: 180px;
  max-width: 220px;
}

label {
  font-weight: 600;
}

.nav-button {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.85rem;
  border: 1px solid #d8e1eb;
  background: #ffffff;
  color: #1f4e79;
  font-size: 1.6rem;
  line-height: 1;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.nav-button:hover {
  background: #eef5ff;
  transform: translateY(-1px);
}

input[type="date"] {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid #cbd5e1;
  border-radius: 0.75rem;
  background: #f8fafc;
}

button {
  cursor: pointer;
  border: none;
  border-radius: 0.75rem;
  padding: 0.85rem 1.25rem;
  background: #1f4e79;
  color: #ffffff;
  font-weight: 700;
}

button:hover {
  background: #163f60;
}

.nav-button {
  background: #eaf2ff;
  color: #1f4e79;
  border: 1px solid #cbdaf0;
}

.nav-button:hover {
  background: #dfeeff;
}

.loader {
  display: none;
  margin-bottom: 1.25rem;
  color: #334e68;
  align-items: center;
  justify-content: center;
}

.day-content {
  display: grid;
  gap: 1.5rem;
}

.day-header {
  padding: 1.75rem;
  background: #f8fafc;
  border: 1px solid #d8e1eb;
  border-radius: 1rem;
  box-shadow: inset 0 0 0 1px transparent;
}

.day-header-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
  margin-bottom: 1rem;
}

.date-title {
  margin: 0 0 0.25rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: #102a43;
  text-transform: capitalize;
}

.date-label {
  margin: 0 0 0.25rem;
  font-size: 0.95rem;
  color: #627d98;
  text-transform: capitalize;
}

.weekday {
  margin: 0;
  font-size: 1rem;
  color: #334e68;
  font-weight: 700;
}

.theme-tag {
  display: inline-flex;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: #e8f1ff;
  color: #1f4e79;
  font-size: 0.95rem;
  font-weight: 700;
}

.theme-description {
  margin: 0;
  color: #334e68;
  line-height: 1.8;
}

.word-list {
  display: grid;
  gap: 1rem;
}

.word-item {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 1rem;
  padding: 1.25rem;
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.06);
}

.word-item-header {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.word-item h3 {
  margin: 0;
  font-size: 1.15rem;
}

.word-meaning {
  margin: 0;
  color: #52627a;
  font-size: 0.95rem;
}

.word-spanish {
  margin: 0 0 1rem;
  color: #1f4e79;
  font-weight: 700;
}

.sentence-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sentence-list li {
  border-top: 1px solid #e2e8f0;
  padding: 0.85rem 0;
}

.sentence-list li:first-child {
  border-top: none;
}

.sentence-list p {
  margin: 0.2rem 0;
  color: #334e68;
}

.all-page .word-item {
  padding: 0;
  overflow: hidden;
}

.word-toggle {
  width: 100%;
  border: none;
  background: transparent;
  color: inherit;
  text-align: left;
  padding: 1.25rem;
  display: grid;
  gap: 0.4rem;
  border-radius: 0;
  font: inherit;
}

.word-toggle:hover {
  background: #f8fafc;
}

.word-toggle-main {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
}

.word-toggle-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
}

.word-toggle-meta {
  margin: 0;
  font-size: 0.95rem;
  color: #52627a;
}

.word-toggle-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: #1f4e79;
}

.word-toggle-badges span {
  background: #edf5ff;
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  font-weight: 600;
}

.all-toolbar {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.toggle-all-link {
  border: 1px solid #d8e1eb;
  background: #f8fafc;
  color: #1f4e79;
  font-weight: 700;
  padding: 0.7rem 1rem;
  border-radius: 999px;
}

.date-link,
.all-link,
.today-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: #edf5ff;
  color: #1f4e79;
  text-decoration: none;
  padding: 0.3rem 0.75rem;
  font-weight: 700;
  transition: background 0.2s ease, transform 0.2s ease;
}

.all-link {
  padding: 0.8rem 1rem;
  text-align: center;
  min-width: 7rem;
}

.today-link {
  padding: 0.5rem 0.8rem;
  font-size: 0.9rem;
}

.date-link:hover,
.all-link:hover,
.today-link:hover {
  background: #dfeeff;
  transform: translateY(-1px);
}

.toolbar-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-left: 0.75rem;
}

.date-picker-wrap {
  flex: 1;
}

.word-details {
  padding: 0 1.25rem 1.25rem;
  border-top: 1px solid #e2e8f0;
  background: #ffffff;
}

.word-details[hidden] {
  display: none;
}

.word-details .meta-grid {
  display: grid;
  gap: 0.45rem;
  margin: 1rem 0 1.1rem;
}

.word-details strong {
  color: #102a43;
}

.word-details ul {
  margin: 0;
  padding-left: 1.2rem;
}

.word-details li {
  margin: 0.5rem 0;
  color: #334e68;
}

.word-details .sentence-line {
  display: block;
  margin-bottom: 0.2rem;
}

.error {
  color: #b91c1c;
  font-weight: 700;
}

footer {
  padding: 1rem 0 2rem;
  color: #334e68;
}

@media (max-width: 720px) {
  .container {
    width: min(96%, 100%);
    padding: 0 0.75rem;
  }

  main {
    padding: 1.25rem 0 2rem;
  }

  .panel {
    padding: 1.25rem;
  }

  .panel-row.date-controls {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .date-picker-wrap {
    width: 100%;
  }

  .nav-button {
    width: 100%;
    height: 3.25rem;
    font-size: 1.1rem;
    border-radius: 0.85rem;
  }

  .day-header {
    padding: 1.5rem;
  }

  .day-header-top {
    flex-direction: column;
    align-items: stretch;
  }

  .theme-tag {
    width: fit-content;
  }

  .word-item {
    padding: 1rem;
  }

  .word-item-header {
    flex-direction: column;
    gap: 0.45rem;
  }

  .date-title {
    font-size: 1.1rem;
  }

  .theme-description {
    font-size: 0.95rem;
  }
}