:root {
  color-scheme: light;
  font-family: "Noto Serif", "Source Serif 4", Georgia, "Times New Roman", serif;
  --bg: #f6f2ea;
  --card: #fffdf9;
  --ink: #2b2b2b;
  --muted: #6b6257;
  --accent: #c2652a;
  --accent-dark: #8f4b20;
  --border: #e2d7c7;
  --chip: #f2e6d3;
  --danger: #b02d2d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at top, #fff9f0 0%, var(--bg) 55%, #f0e7d8 100%);
  color: var(--ink);
}

#app {
  max-width: 960px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px 12px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 251, 244, 0.9);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 5;
}

.brand-title {
  font-size: 20px;
  font-weight: 700;
}

.brand-subtitle {
  font-size: 12px;
  color: var(--muted);
}

.topnav {
  display: flex;
  gap: 8px;
}

.nav-btn {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--ink);
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
}

.nav-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.view-stack {
  padding: 20px 24px 40px;
}

.view {
  display: none;
}

.view.active {
  display: block;
  animation: fadeIn 0.25s ease-out;
}

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

h1 {
  margin: 0 0 12px;
  font-size: 26px;
}

h2 {
  margin: 0 0 8px;
  font-size: 18px;
}

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

button,
.file-input {
  border: 1px solid transparent;
  background: var(--accent);
  color: #fff;
  padding: 10px 16px;
  border-radius: 12px;
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
}

button.secondary {
  background: var(--card);
  color: var(--ink);
  border-color: var(--border);
}

button.danger {
  background: var(--danger);
}

.file-input {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.file-input input {
  display: none;
}

.search-row {
  margin: 12px 0 16px;
}

.search-row input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card);
  font-size: 15px;
}

.list {
  display: grid;
  gap: 12px;
}

.list.simple {
  gap: 8px;
}

.card {
  border: 1px solid var(--border);
  background: var(--card);
  padding: 14px 16px;
  border-radius: 14px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.card-word {
  font-size: 20px;
  font-weight: 700;
}

.card-pinyin {
  color: var(--muted);
  margin-top: 2px;
}

.card-meaning {
  margin-top: 6px;
  color: var(--ink);
}

.detail {
  display: grid;
  gap: 14px;
  background: var(--card);
  border-radius: 16px;
  border: 1px solid var(--border);
  padding: 18px;
}

.detail .word {
  font-size: 30px;
  font-weight: 700;
}

.detail .pinyin {
  color: var(--muted);
  font-size: 18px;
}

.detail .section {
  display: grid;
  gap: 6px;
}

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

.chip {
  background: var(--chip);
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 13px;
}

.chip.static {
  cursor: default;
}

.selected-filter {
  margin-bottom: 12px;
  font-weight: 600;
  color: var(--accent-dark);
}

.selected-filter.hidden {
  display: none;
}

.settings {
  display: grid;
  gap: 20px;
}

.settings-section {
  border: 1px solid var(--border);
  background: var(--card);
  padding: 16px;
  border-radius: 14px;
}

.data-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.edit-form {
  display: grid;
  gap: 12px;
  background: var(--card);
  padding: 18px;
  border-radius: 16px;
  border: 1px solid var(--border);
}

.form-row {
  display: grid;
  gap: 6px;
}

.form-row input,
.form-row textarea {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-family: inherit;
}

.form-row.locked {
  opacity: 0.8;
}

.form-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.export-confirm {
  background: var(--card);
  border-radius: 14px;
  border: 1px solid var(--border);
  padding: 16px;
  display: grid;
  gap: 12px;
}

.drawer {
  position: fixed;
  inset: 0;
  display: flex;
  z-index: 10;
}

.drawer.hidden {
  display: none;
}

.drawer-content {
  width: min(400px, 85vw);
  background: var(--card);
  border-right: 1px solid var(--border);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: slideIn 0.2s ease-out;
}

.drawer-body {
  overflow-y: auto;
  padding-right: 8px;
}

.drawer-backdrop {
  flex: 1;
  background: rgba(43, 43, 43, 0.35);
}

.filter-group {
  margin-bottom: 12px;
}

.filter-options {
  display: grid;
  gap: 8px;
}

.filter-option {
  display: flex;
  gap: 8px;
  align-items: center;
}

.drawer-actions {
  display: flex;
  gap: 8px;
  margin-top: auto;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
  from { transform: translateX(-10px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@media (max-width: 720px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .view-stack {
    padding: 16px;
  }

  .detail .word {
    font-size: 26px;
  }
}