@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;900&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --white:  #ffffff;
  --navy:   #181d26;
  --blue:   #1b61c9;
  --blue-mid: #254fad;
  --gray:   #333333;
  --border: #e0e2e6;
  --weak:   rgba(4,14,32,0.69);
  --light:  #f8fafc;
  --right:  #16a34a;
  --wrong:  #dc2626;
  --font:   'Inter', -apple-system, system-ui, sans-serif;
  --r-sm:   12px;
  --r-md:   16px;
  --r-pill: 999px;
  --shadow-blue: rgba(0,0,0,0.32) 0 0 1px, rgba(45,127,249,0.28) 0 1px 3px;
  --shadow-soft: rgba(15,48,106,0.05) 0 0 20px;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.35;
  letter-spacing: 0.08px;
  background: var(--light);
  color: var(--navy);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Nav ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 52px;
  background: var(--white);
  border-bottom: 1px solid var(--border);
}
.nav-left {
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--navy);
  letter-spacing: 0.14px;
}
.nav-logo {
  width: 24px;
  height: 24px;
  flex: 0 0 auto;
  display: block;
}
.nav-brand:hover { text-decoration: none; color: var(--blue); }
.nav-back-link {
  font-size: 13px;
  color: var(--weak);
  border-left: 1px solid var(--border);
  padding-left: 16px;
}
.nav-back-link:hover { color: var(--navy); text-decoration: none; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--weak);
  padding: 6px 12px;
  border-radius: 8px;
  transition: background 0.12s, color 0.12s;
}
.nav-link:hover { background: var(--light); color: var(--navy); text-decoration: none; }
.nav-link.active { color: var(--navy); }
.nav-home-btn {
  display: inline-block;
  background: var(--blue);
  color: var(--white);
  padding: 8px 18px;
  border-radius: var(--r-sm);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.08px;
}
.nav-home-btn:hover { background: var(--blue-mid); text-decoration: none; color: var(--white); }

/* burger button */
.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  border-radius: 8px;
}
.nav-burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}
.nav-burger-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger-open span:nth-child(2) { opacity: 0; }
.nav-burger-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 600px) {
  .nav-burger { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 52px;
    left: 0; right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 2px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  }
  .nav-links.nav-open { display: flex; }
  .nav-link { padding: 10px 12px; font-size: 15px; }
  main { padding-top: 24px; }
}

/* ── Footer ── */
.site-footer {
  margin-top: 64px;
  border-top: 1px solid var(--border);
  background: var(--white);
  padding: 24px;
}
.footer-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--weak);
}
.footer-logo {
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  display: block;
}
.footer-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-nav a {
  font-size: 13px;
  color: var(--weak);
}
.footer-nav a:hover { color: var(--navy); text-decoration: none; }

/* ── Layout ── */
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 48px 24px;
}

.section-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--weak);
  letter-spacing: 0.28px;
  margin-bottom: 8px;
}
.section-title {
  font-size: 32px;
  font-weight: 400;
  line-height: 1.25;
  margin-bottom: 24px;
}

/* ── Buttons ── */
.btn-blue {
  display: inline-block;
  background: var(--blue);
  color: var(--white);
  padding: 12px 24px;
  border-radius: var(--r-sm);
  font-size: 16px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  letter-spacing: 0.08px;
  transition: background 0.15s;
}
.btn-blue:hover { background: var(--blue-mid); text-decoration: none; color: var(--white); }

.btn-outline {
  display: inline-block;
  background: var(--white);
  color: var(--navy);
  padding: 12px 24px;
  border-radius: var(--r-sm);
  border: 1px solid var(--navy);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  letter-spacing: 0.08px;
  transition: background 0.15s;
}
.btn-outline:hover { background: var(--light); text-decoration: none; }

.btn-sm {
  padding: 6px 14px;
  font-size: 14px;
  border-radius: var(--r-sm);
  font-weight: 500;
  border: none;
  cursor: pointer;
}

/* ── Search ── */
.search-wrap { margin-bottom: 32px; }
.form-input {
  width: 100%;
  background: var(--white);
  color: var(--navy);
  border: 1px solid var(--border);
  padding: 12px 16px;
  border-radius: var(--r-sm);
  font-family: var(--font);
  font-size: 16px;
  outline: none;
  letter-spacing: 0.08px;
}
.form-input:focus { border-color: var(--blue); box-shadow: 0 0 0 1px var(--blue); }

/* ── Practice set chips ── */
.quick-sets { margin-bottom: 40px; }
.quick-sets h2 {
  font-size: 14px;
  font-weight: 500;
  color: var(--weak);
  letter-spacing: 0.28px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.set-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.set-card {
  padding: 8px 18px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  font-size: 14px;
  font-weight: 500;
  color: var(--navy);
  letter-spacing: 0.08px;
  transition: background 0.15s, border-color 0.15s;
}
.set-card:hover {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
  text-decoration: none;
}

/* ── Verb list ── */
.verb-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}
.verb-row-selected { background: #eef3fd; margin: 0 -16px; padding-left: 16px; padding-right: 16px; }
.verb-tick {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  border: 1.5px solid var(--border);
  background: var(--white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: transparent;
  transition: border-color 0.12s, background 0.12s, color 0.12s;
}
.verb-tick:hover { border-color: var(--blue); }
.verb-tick-on { background: var(--blue); border-color: var(--blue); color: var(--white); }

/* ── Practice selection bar ── */
.practice-bar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--navy);
  color: var(--white);
  padding: 12px 20px;
  border-radius: 32px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.25);
  font-size: 14px;
  white-space: nowrap;
  z-index: 100;
}
.practice-bar.hidden { display: none; }
.practice-bar-clear {
  background: none;
  border: none;
  color: rgba(255,255,255,0.55);
  font-size: 13px;
  cursor: pointer;
  padding: 0;
}
.practice-bar-clear:hover { color: var(--white); }
.practice-bar-btn {
  background: var(--blue);
  color: var(--white);
  padding: 7px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
}
.practice-bar-btn:hover { opacity: 0.88; text-decoration: none; color: var(--white); }
.verb-name {
  font-weight: 600;
  min-width: 140px;
  font-size: 15px;
  color: var(--navy);
}
.verb-name:hover { color: var(--blue); text-decoration: none; }
.verb-meaning { flex: 1; color: var(--weak); font-size: 14px; letter-spacing: 0.07px; }
.practice-btn {
  padding: 5px 14px;
  font-size: 13px;
  background: var(--blue);
  color: var(--white);
  border-radius: var(--r-pill);
  font-weight: 500;
  white-space: nowrap;
}
.practice-btn:hover { background: var(--blue-mid); text-decoration: none; color: var(--white); }

#load-more-wrap { text-align: center; margin-top: 24px; }

/* ── Tabs ── */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
  background: var(--white);
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}
.tab-btn {
  flex: 0 0 auto;
  padding: 10px 20px;
  border: none;
  background: none;
  cursor: pointer;
  font-family: var(--font);
  font-size: 14px;
  font-weight: 500;
  color: var(--weak);
  letter-spacing: 0.14px;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  white-space: nowrap;
  transition: color 0.15s;
}
.tab-btn.active { color: var(--blue); border-bottom-color: var(--blue); }
.tab-btn:hover { color: var(--navy); }

.tab-panel.hidden { display: none; }

/* ── Verb grid (shared across flashcards.html + practicar.html) ── */
.verb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}
.verb-grid-item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
}
.verb-grid-item a { font-weight: 600; font-size: 15px; color: var(--navy); }
.verb-grid-item a:hover { color: var(--blue); }
.verb-grid-item span { font-size: 13px; color: var(--weak); flex: 1; }
.verb-exclude-btn {
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--weak);
  font-size: 11px;
  padding: 0 2px;
  line-height: 1;
  transition: color 0.1s;
}
.verb-exclude-btn:hover { color: #e53935; }
.verb-excluded { opacity: 0.35; }
.verb-excluded .verb-exclude-btn { color: #e53935; opacity: 1; }
.excluded-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--weak);
  margin-bottom: 12px;
}

/* ── Verb page header ── */
#verb-header { margin-bottom: 24px; }
#verb-header h2 { font-size: 32px; font-weight: 400; line-height: 1.25; }
#verb-header .meaning {
  font-size: 18px;
  font-weight: 400;
  color: var(--weak);
  margin-left: 10px;
  letter-spacing: 0.18px;
}
#verb-header .practice-btn { display: inline-block; margin-top: 12px; }

/* ── Conjugation table ── */
#conj-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--white);
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
}
#conj-table th, #conj-table td {
  padding: 10px 14px;
  border: 1px solid var(--border);
  text-align: left;
}
#conj-table th {
  background: var(--light);
  font-size: 13px;
  font-weight: 500;
  color: var(--weak);
  letter-spacing: 0.13px;
  text-transform: capitalize;
}
.pronoun-cell { font-weight: 600; color: var(--navy); }

/* ── Controls bar ── */
.controls-bar {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 16px 20px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-soft);
}
.control-group > .control-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--weak);
  letter-spacing: 0.14px;
  display: block;
  margin-bottom: 10px;
  text-transform: uppercase;
  font-size: 12px;
}
.tense-checkboxes { display: flex; flex-wrap: wrap; gap: 8px; }
.tense-checkboxes label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--white);
  transition: all 0.15s;
  user-select: none;
}
.tense-checkboxes input[type="checkbox"] { display: none; }
.tense-checkboxes label:has(input:checked) {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}

/* ── Flashcard ── */
.fc-wrap {
  max-width: 500px;
  margin: 0 auto;
}

.fc-stats {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 500;
  color: var(--weak);
  letter-spacing: 0.13px;
  margin-bottom: 16px;
}

.fc-card {
  perspective: 900px;
  height: 220px;
  cursor: pointer;
  margin-bottom: 20px;
}
.fc-card.hidden { display: none; }
.fc-empty {
  min-height: 190px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--white);
  color: var(--weak);
  text-align: center;
}

.fc-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.38s cubic-bezier(0.4,0,0.2,1);
}
.fc-card.flipped .fc-inner { transform: rotateY(180deg); }

.fc-front, .fc-back {
  position: absolute;
  inset: 0;
  border-radius: var(--r-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  backface-visibility: hidden;
  padding: 24px;
  text-align: center;
  user-select: none;
}

.fc-front {
  background: var(--blue);
  border: none;
  box-shadow: rgba(27,97,201,0.35) 0 4px 20px;
}

.fc-back {
  background: var(--white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
}

.fc-back {
  transform: rotateY(180deg);
  font-size: 2rem;
  font-weight: 600;
  color: var(--blue);
  letter-spacing: 0.08px;
}

.fc-hint {
  position: absolute;
  bottom: 12px;
  font-size: 11px;
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.11px;
}

.fc-pronoun {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--white);
  line-height: 1.3;
}
.fc-meaning {
  font-size: 14px;
  font-weight: 400;
  color: rgba(255,255,255,0.85);
  margin-top: 4px;
  letter-spacing: 0.08px;
}
.fc-tense {
  font-size: 12px;
  font-weight: 500;
  color: rgba(255,255,255,0.55);
  margin-top: 6px;
  letter-spacing: 0.13px;
  text-transform: capitalize;
}
.fc-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 16px;
}
.fc-buttons button {
  flex: 1;
  padding: 14px 0;
  border: none;
  border-radius: var(--r-sm);
  font-family: var(--font);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  letter-spacing: 0.08px;
  transition: opacity 0.15s;
}
.fc-buttons button:hover { opacity: 0.85; }
.fc-buttons button.hidden { display: none; }
.btn-right { background: var(--right); color: #fff; }
.btn-wrong { background: var(--wrong); color: #fff; }

/* ── Round end ── */
.fc-round-end {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-soft);
}
.fc-round-end.hidden { display: none; }
.fc-round-end p {
  font-size: 18px;
  font-weight: 400;
  color: var(--weak);
  margin-bottom: 16px;
  letter-spacing: 0.18px;
}
.fc-round-end ul {
  text-align: left;
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--gray);
}
.fc-round-end ul li { padding: 2px 0; }
.fc-round-end .round-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.fc-round-end button {
  padding: 10px 24px;
  border-radius: var(--r-sm);
  font-family: var(--font);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}
.fc-round-end button.hidden { display: none; }
#fc-replay { background: var(--blue); color: var(--white); border: none; }
#fc-replay:hover { background: var(--blue-mid); }
#fc-fix { background: var(--white); color: var(--navy); border: 1px solid var(--navy); }
#fc-fix:hover { background: var(--light); }

/* ── Responsive ── */
@media (max-width: 820px) {
  #main-tabs > .tab-btn[data-tab="verbs"] {
    display: none;
  }
}

@media (max-width: 640px) {
  main { padding: 24px 16px; }
  .tabs {
    margin-left: -16px;
    margin-right: -16px;
    padding: 0 16px;
    scroll-padding-inline: 16px;
  }
  .tab-btn {
    padding: 10px 14px;
  }
  .fc-modes,
  .tense-checkboxes,
  .fc-range-row {
    justify-content: center;
  }
  .fc-range-row {
    gap: 8px;
  }
  .fc-card { height: 190px; }
  .fc-back { font-size: 1.5rem; }
  .section-title { font-size: 24px; }
}

/* ── Conversations ── */
.conv-line {
  padding: 10px 14px;
  border-radius: var(--r-sm);
  margin-bottom: 6px;
  font-size: 14px;
  line-height: 1.5;
}
.conv-speaker-1 { background: var(--light); }
.conv-speaker-2 { background: #eef3fd; }
.conv-speaker { font-weight: 600; color: var(--blue); margin-right: 6px; }
.conv-reveal {
  margin-left: 6px;
  padding: 1px 6px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--white);
  cursor: pointer;
  font-size: 11px;
  color: var(--weak);
}
.conv-reveal:hover { background: var(--blue); color: var(--white); border-color: var(--blue); }
.conv-translation { font-size: 13px; color: var(--weak); margin-top: 4px; font-style: italic; }
.conv-translation.hidden { display: none; }
.conv-set {
  max-width: 720px;
  margin: 0 auto 24px;
}
.conv-set h3 {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 18px;
}
.conv-set h3 span {
  font-size: 13px;
  font-weight: 400;
  color: var(--weak);
}
.conv-register {
  margin: 16px 0 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--weak);
  text-transform: uppercase;
}

/* ── Conjugation game ── */
.cg-wrap { max-width: 600px; }

.cg-controls {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 20px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-soft);
}
.cg-control-row { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.cg-label { font-size: 13px; font-weight: 500; color: var(--weak); letter-spacing: 0.13px; white-space: nowrap; }
.cg-input-num {
  width: 80px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  font-family: var(--font);
  font-size: 15px;
  outline: none;
}
.cg-input-num:focus { border-color: var(--blue); box-shadow: 0 0 0 1px var(--blue); }
.cg-btn-sm { padding: 8px 14px; font-size: 14px; }
.cg-tense-row { margin-bottom: 16px; }
.cg-tense-row .cg-label { display: block; margin-bottom: 8px; }
.cg-toggle-row { display: flex; gap: 20px; margin-bottom: 20px; }
.cg-toggle-label { display: flex; align-items: center; gap: 6px; font-size: 14px; cursor: pointer; }
.cg-start-btn { width: 100%; padding: 14px; font-size: 16px; }

.cg-scorebar {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 500;
  color: var(--weak);
  margin-bottom: 16px;
}

.cg-sentence-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-soft);
}
.cg-sentence { font-size: 1.1rem; font-weight: 500; color: var(--navy); margin-bottom: 6px; line-height: 1.5; }
.cg-translation { font-size: 14px; color: var(--weak); margin-bottom: 8px; }
.cg-verb-hint { font-size: 14px; }
.cg-inf { font-weight: 600; color: var(--navy); margin-right: 6px; }
.cg-tense-badge {
  display: inline-block;
  padding: 2px 8px;
  background: var(--light);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  font-size: 12px;
  font-weight: 500;
  color: var(--weak);
  text-transform: capitalize;
}

.cg-answer-row { display: flex; gap: 8px; margin-bottom: 10px; }
.cg-answer { flex: 1; }
.cg-audio-btn {
  padding: 8px 14px;
  background: var(--light);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  cursor: pointer;
  font-size: 14px;
  transition: background 0.15s;
}
.cg-audio-btn:hover { background: var(--blue); color: var(--white); border-color: var(--blue); }

.cg-accents { display: flex; gap: 6px; margin-bottom: 12px; flex-wrap: wrap; }
.cg-accent-btn {
  padding: 6px 10px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 15px;
  font-family: var(--font);
  transition: background 0.12s;
}
.cg-accent-btn:hover { background: var(--light); }

.cg-result { min-height: 24px; font-size: 14px; font-weight: 500; }
.cg-correct { color: var(--right); }
.cg-wrong   { color: var(--wrong); }

.cg-summary {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 24px;
  box-shadow: var(--shadow-soft);
}
.cg-summary-msg { font-size: 18px; color: var(--weak); margin-bottom: 16px; }
.cg-error-list { font-size: 14px; line-height: 1.7; margin-bottom: 8px; }

/* radio mode selectors reuse tense-checkboxes style */
.tense-checkboxes input[type="radio"] { display: none; }
.tense-checkboxes label:has(input[type="radio"]:checked) {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}

/* ── Flashcard mode buttons ── */
.fc-modes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}
.fc-mode-btn {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--white);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 500;
  color: var(--navy);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.fc-mode-btn:hover { background: var(--light); }
.fc-mode-btn.active {
  background: var(--blue);
  border-color: var(--blue);
  color: var(--white);
}
.verbs-mobile-return,
.verbs-mobile-actions {
  display: none;
}
.verbs-return-label {
  color: var(--navy);
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 8px;
}
@media (max-width: 640px) {
  .verbs-mobile-return {
    display: block;
    margin-top: 16px;
  }
  .verbs-mobile-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: flex-start;
    margin-bottom: 18px;
  }
}

/* ── Audio deck ── */
.ad-speaker-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 34px;
  line-height: 1;
  transition: transform 0.1s;
}
.ad-speaker-btn:hover { transform: scale(1.12); }
.ad-sentence {
  font-size: 1.1rem;
  font-weight: 500;
  line-height: 1.5;
  color: var(--navy);
}
.ad-highlight { color: var(--blue); }
.ad-translation {
  display: block;
  font-size: 14px;
  color: var(--weak);
  margin-top: 8px;
}
.ad-play-back-btn {
  margin-top: 12px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 13px;
  cursor: pointer;
  color: var(--navy);
}
.ad-play-back-btn:hover { border-color: var(--blue); color: var(--blue); }
.ad-speed-control {
  width: 100%;
  display: grid;
  justify-items: center;
  gap: 6px;
  color: var(--navy);
  font-size: 14px;
}
.ad-speed-control input[type="range"] {
  width: 190px;
  accent-color: var(--blue);
  cursor: pointer;
}
.ad-speed-control span {
  font-size: 16px;
  font-weight: 700;
}
.ad-empty {
  color: var(--weak);
  font-size: 14px;
  text-align: center;
  margin-top: 16px;
}

/* ── Flashcard range controls ── */
.fc-range-row {
  display: flex;
  gap: 16px;
  align-items: center;
  margin: 10px 0 4px;
  flex-wrap: wrap;
}
.fc-range-verbs-btn {
  padding: 6px 16px;
}
.fc-range-input {
  width: 64px;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  font-family: var(--font);
  font-size: 13px;
  color: var(--navy);
  background: var(--white);
  outline: none;
  -moz-appearance: textfield;
}
.fc-range-input:focus { border-color: var(--blue); }
.fc-range-input::-webkit-inner-spin-button,
.fc-range-input::-webkit-outer-spin-button { opacity: 1; }

/* ── Flashcard translation option ── */
.fc-options {
  display: flex;
  justify-content: flex-end;
  gap: 16px;
  margin-top: 10px;
}
.fc-opt-reverse { cursor: pointer; gap: 6px; }
.fc-opt-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--weak);
}
.fc-opt-label select {
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  font-family: var(--font);
  font-size: 13px;
  background: var(--white);
  color: var(--navy);
  cursor: pointer;
  outline: none;
}
.fc-opt-label select:focus { border-color: var(--blue); }

.fc-back-form { font-size: 2rem; font-weight: 600; color: var(--blue); }
.fc-back-meaning {
  display: block;
  font-size: 14px;
  font-weight: 400;
  color: var(--weak);
  margin-top: 8px;
}