:root {
  --bg: #f7f5ef;
  --fg: #1b2447;
  --fg-muted: #6b7094;
  --accent: #b8862f;
  --accent-dark: #8f6a23;
  --card-bg: #ffffff;
  --border: #e0dccd;
  --radius: 12px;
  --danger: #c0392b;
  --success: #2e7d32;
}

:root[data-theme="dark"] {
  --bg: #12162b;
  --fg: #eef0f7;
  --fg-muted: #9aa1c4;
  --card-bg: #1c2140;
  --border: #2c3358;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12162b;
    --fg: #eef0f7;
    --fg-muted: #9aa1c4;
    --card-bg: #1c2140;
    --border: #2c3358;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", system-ui, -apple-system, sans-serif;
  min-height: 100%;
}

.hidden { display: none !important; }

/* --- Header & nav --- */

.app-header {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
  padding: 1.2rem 1rem 0.4rem;
}

.app-header h1 {
  margin: 0;
  font-size: 1.5rem;
  letter-spacing: 0.05em;
}

.header-sub {
  display: block;
  font-size: 0.68rem;
  font-weight: normal;
  color: var(--fg-muted);
  letter-spacing: 0.02em;
  margin-top: 0.15rem;
}

.icon-btn {
  background: none;
  border: none;
  color: var(--fg);
  cursor: pointer;
  padding: 0.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.icon-btn:hover, .icon-btn:focus-visible { color: var(--accent); }
.icon-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.settings-btn { position: absolute; top: 0.7rem; right: 0.8rem; }

.hamburger-icon { display: flex; flex-direction: column; justify-content: space-between; width: 1.3rem; height: 0.9rem; }
.hamburger-icon span { display: block; height: 2px; border-radius: 2px; background: currentColor; }

.main-nav {
  display: flex;
  justify-content: center;
  gap: 0.3rem;
  max-width: 640px;
  margin: 0.4rem auto 0.8rem;
  padding: 0 0.6rem;
  flex-wrap: wrap;
}

.nav-btn {
  background: none;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--fg-muted);
  cursor: pointer;
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.3;
}
.nav-btn span { font-size: 0.62rem; }
.nav-btn:hover { color: var(--fg); }
.nav-btn.active { color: var(--accent); border-color: var(--border); background: var(--card-bg); }

/* --- Main / views --- */

#view-root { max-width: 640px; margin: 0 auto; padding: 0 0.8rem 3rem; }
.view-intro { font-size: 0.85rem; color: var(--fg-muted); }
.view-intro span { display: block; font-size: 0.75rem; }
.view-actions { display: flex; justify-content: flex-end; margin-bottom: 0.6rem; }

.text-btn {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 0.8rem;
  padding: 0.3rem 0;
}
.text-btn span { display: block; font-size: 0.65rem; color: var(--fg-muted); }

.back-btn {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0.5rem 0 0.8rem;
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
}
.back-btn span { font-size: 0.75rem; }

/* --- Search bar --- */

.search-bar { position: sticky; top: 0; background: var(--bg); padding-top: 0.2rem; z-index: 5; }

.search-mode-toggle { display: flex; gap: 0.4rem; margin-bottom: 0.5rem; }

.mode-btn {
  flex: 1;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--fg-muted);
  cursor: pointer;
  padding: 0.5rem;
  font-size: 0.85rem;
}
.mode-btn span { display: block; font-size: 0.62rem; }
.mode-btn.active { color: #fff; background: var(--accent); border-color: var(--accent); }

.search-input-wrap { position: relative; }

#search-input {
  width: 100%;
  padding: 0.7rem 0.9rem;
  font-size: 1.1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  color: var(--fg);
}
#search-input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.search-preview {
  min-height: 1.2rem;
  padding: 0.3rem 0.3rem 0;
  font-size: 0.95rem;
  color: var(--fg-muted);
}

.search-status { font-size: 0.8rem; color: var(--fg-muted); padding: 0.4rem 0.2rem; min-height: 1.2rem; }

/* --- Results list & entry cards --- */

.results-list { display: flex; flex-direction: column; gap: 0.5rem; padding: 0.4rem 0 1rem; }

.result-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.7rem 0.9rem;
  cursor: pointer;
  text-align: left;
  width: 100%;
  color: var(--fg);
}
.result-card:hover, .result-card:focus-visible { border-color: var(--accent); outline: none; }

.result-headword { font-size: 1.15rem; line-height: 2.1; }
.result-headword .kanji-form { font-weight: 600; }
.result-headword .reading-form { color: var(--fg-muted); font-size: 0.85rem; margin-left: 0.4rem; }
.furigana-headword ruby rt { font-size: 0.6em; font-weight: normal; color: var(--fg-muted); user-select: none; }
.result-common-star { color: var(--accent); margin-right: 0.3rem; font-size: 0.8rem; }
.result-gloss { font-size: 0.85rem; color: var(--fg-muted); margin-top: 0.2rem; }
.result-pos { font-size: 0.68rem; color: var(--accent-dark); margin-right: 0.4rem; }

.empty-state { color: var(--fg-muted); font-size: 0.85rem; padding: 1rem 0.2rem; text-align: center; }
.empty-state span { display: block; font-size: 0.75rem; margin-top: 0.2rem; }

/* --- Entry detail --- */

.entry-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 0.6rem; margin-bottom: 0.6rem; }
.entry-headwords { font-size: 1.6rem; line-height: 1.4; }
.entry-headwords .kanji-form { font-weight: 600; }
.k-char { cursor: pointer; border-bottom: 1px dotted var(--accent); border-radius: 2px; }
.k-char:hover { color: var(--accent); }
.k-char:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.entry-alt-forms { font-size: 0.85rem; color: var(--fg-muted); }
.entry-readings { font-size: 1rem; color: var(--fg-muted); margin-top: 0.2rem; }

.entry-actions { display: flex; gap: 0.4rem; flex-shrink: 0; }
.entry-actions button {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--fg-muted);
  cursor: pointer;
  padding: 0.35rem 0.5rem;
  font-size: 0.85rem;
}
.entry-actions button.active { color: var(--accent); border-color: var(--accent); }

.sense-list { list-style: none; margin: 0.6rem 0; padding: 0; counter-reset: sense; }
.sense-item { counter-increment: sense; padding: 0.5rem 0; border-bottom: 1px solid var(--border); }
.sense-item::before { content: counter(sense) ". "; color: var(--accent); font-weight: 600; }
.sense-tags { font-size: 0.68rem; color: var(--accent-dark); margin-right: 0.3rem; }
.sense-gloss { font-size: 0.95rem; }

.copy-row { display: flex; gap: 0.4rem; margin: 0.6rem 0; flex-wrap: wrap; }
.copy-row button {
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--fg-muted);
  cursor: pointer;
  padding: 0.3rem 0.6rem;
  font-size: 0.75rem;
}

.tag-row { display: flex; align-items: center; gap: 0.4rem; flex-wrap: wrap; margin: 0.6rem 0; }
.tag-chip {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
  font-size: 0.75rem;
  color: var(--fg-muted);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}
.tag-chip button { background: none; border: none; color: var(--fg-muted); cursor: pointer; padding: 0; }
.tag-input { border: 1px dashed var(--border); border-radius: 999px; background: none; color: var(--fg); padding: 0.15rem 0.6rem; font-size: 0.75rem; width: 6rem; }

/* --- Conjugation table --- */

.conj-section { margin-top: 1rem; }
.conj-section summary { cursor: pointer; font-size: 0.9rem; color: var(--accent); padding: 0.4rem 0; }
.conj-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; margin-top: 0.4rem; }
.conj-table td, .conj-table th { padding: 0.35rem 0.4rem; border-bottom: 1px solid var(--border); text-align: left; }
.conj-table th { color: var(--fg-muted); font-weight: normal; font-size: 0.75rem; }
.conj-label { color: var(--fg-muted); font-size: 0.75rem; white-space: nowrap; }
.conj-note { font-size: 0.78rem; color: var(--fg-muted); padding: 0.4rem 0; }

/* --- Kanji detail --- */

.kanji-header { display: flex; gap: 1rem; align-items: flex-start; margin-bottom: 0.8rem; }
.kanji-glyph { font-size: 4rem; line-height: 1; }
.kanji-meta { flex: 1; }
.kanji-meanings { font-size: 1rem; margin-bottom: 0.3rem; }
.kanji-stats { display: flex; flex-wrap: wrap; gap: 0.4rem; font-size: 0.72rem; color: var(--fg-muted); }
.kanji-stats span { background: var(--card-bg); border: 1px solid var(--border); border-radius: 999px; padding: 0.15rem 0.55rem; }

.reading-block { margin: 0.5rem 0; }
.reading-block-label { font-size: 0.72rem; color: var(--fg-muted); }
.reading-block-value { font-size: 1rem; }

.stroke-order-box { margin: 0.8rem 0; text-align: center; }
.stroke-order-box svg { max-width: 220px; width: 100%; height: auto; }
.stroke-order-box.show-numbers-off [id^="kvg:StrokeNumbers"] { display: none; }
.stroke-order-controls { margin-top: 0.4rem; }
.stroke-order-controls button {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: 8px;
  color: var(--fg-muted); cursor: pointer; padding: 0.3rem 0.7rem; font-size: 0.8rem;
}

.sentence-list { display: flex; flex-direction: column; gap: 0.6rem; margin: 0.4rem 0; }
.sentence-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 0.6rem 0.8rem; }
.sentence-jp { font-size: 1.05rem; line-height: 2.1; }
.sentence-jp ruby rt { font-size: 0.6em; color: var(--fg-muted); user-select: none; }
.sentence-jp.furigana-off rt { display: none; }
.sentence-en { font-size: 0.82rem; color: var(--fg-muted); margin-top: 0.2rem; }

.radical-of { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.5rem 0; }
.radical-chip {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: 8px;
  padding: 0.25rem 0.5rem; font-size: 0.85rem; cursor: pointer; color: var(--fg);
}
.radical-chip:hover { border-color: var(--accent); }

/* --- Radical picker --- */

.radical-selected { display: flex; flex-wrap: wrap; gap: 0.3rem; min-height: 2rem; margin: 0.4rem 0; }
.radical-stroke-group { margin-bottom: 0.6rem; }
.radical-stroke-group h4 { font-size: 0.7rem; color: var(--fg-muted); margin: 0.3rem 0; }
.radical-row { display: flex; flex-wrap: wrap; gap: 0.3rem; }

.radical-btn {
  min-width: 2.1rem;
  height: 2.1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--fg);
  cursor: pointer;
  font-size: 1.05rem;
}
.radical-btn.selected { background: var(--accent); border-color: var(--accent); color: #fff; }

.radical-results-heading { font-size: 0.85rem; color: var(--fg-muted); margin-top: 1rem; }
.kanji-grid { display: flex; flex-wrap: wrap; gap: 0.35rem; padding-bottom: 1rem; }
.kanji-grid button {
  width: 2.4rem; height: 2.4rem;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--card-bg); color: var(--fg); font-size: 1.2rem; cursor: pointer;
}
.kanji-grid button:hover { border-color: var(--accent); }

/* --- Notepad tag filter --- */

.tag-filter { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-bottom: 0.6rem; }
.tag-filter button {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: 999px;
  padding: 0.2rem 0.65rem; font-size: 0.75rem; color: var(--fg-muted); cursor: pointer;
}
.tag-filter button.active { color: #fff; background: var(--accent); border-color: var(--accent); }

/* --- Settings dialog (shared pattern) --- */

.settings-overlay {
  position: fixed; inset: 0; background: rgba(0, 0, 0, 0.4);
  display: flex; align-items: center; justify-content: center; padding: 1rem; z-index: 100;
}
.settings-panel {
  width: 100%; max-width: 360px; background: var(--card-bg);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.2rem 1.2rem;
}
.settings-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.4rem; }
.settings-header h2 { margin: 0; font-size: 1.05rem; }
.settings-header h2 span { display: block; font-size: 0.65rem; font-weight: normal; color: var(--fg-muted); margin-top: 0.1rem; }
.settings-header .icon-btn { font-size: 1.4rem; line-height: 1; }

.settings-row { display: flex; align-items: center; justify-content: space-between; gap: 0.8rem; padding: 0.8rem 0; border-bottom: 1px solid var(--border); }
.settings-row:last-child { border-bottom: none; }
.settings-row-column { flex-direction: column; align-items: stretch; gap: 0.5rem; }
.settings-row-label { font-size: 0.9rem; }
.settings-row-label span { display: block; font-size: 0.7rem; font-weight: normal; color: var(--fg-muted); margin-top: 0.1rem; }

.switch { position: relative; display: inline-block; flex-shrink: 0; width: 2.6rem; height: 1.5rem; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch-slider { position: absolute; inset: 0; background: var(--border); border-radius: 999px; cursor: pointer; transition: background 0.15s; }
.switch-slider::before { content: ''; position: absolute; height: 1.1rem; width: 1.1rem; left: 0.2rem; bottom: 0.2rem; background: #fff; border-radius: 50%; transition: transform 0.15s; }
.switch input:checked + .switch-slider { background: var(--accent); }
.switch input:checked + .switch-slider::before { transform: translateX(1.1rem); }

.settings-segmented { display: flex; gap: 0.3rem; }
.segmented-btn { flex: 1; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; color: var(--fg-muted); cursor: pointer; padding: 0.4rem; font-size: 0.8rem; }
.segmented-btn span { display: block; font-size: 0.6rem; }
.segmented-btn.active { color: #fff; background: var(--accent); border-color: var(--accent); }

.settings-install-btn { background: var(--accent); border: none; border-radius: 8px; color: #fff; cursor: pointer; padding: 0.5rem; font-size: 0.85rem; }
.settings-install-btn span { display: block; font-size: 0.65rem; }
.settings-install-hint { font-size: 0.75rem; color: var(--fg-muted); }

.settings-about { text-align: center; }
.about-app { font-size: 0.85rem; margin: 0.2rem 0; }
.about-version { color: var(--fg-muted); font-size: 0.7rem; }
.about-note { font-size: 0.7rem; color: var(--fg-muted); }
.about-note span { display: block; margin-top: 0.15rem; }
.about-link { font-size: 0.75rem; color: var(--accent); }

/* --- Toast --- */

.toast {
  position: fixed; bottom: 1.2rem; left: 50%; transform: translateX(-50%);
  background: var(--fg); color: var(--bg); padding: 0.5rem 1rem; border-radius: 999px;
  font-size: 0.82rem; z-index: 200; box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

@media (max-width: 420px) {
  .app-header h1 { font-size: 1.3rem; }
  .kanji-glyph { font-size: 3.2rem; }
}