:root {
  --bg:        var(--tg-theme-bg-color, #0e0e0e);
  --bg-2:      var(--tg-theme-secondary-bg-color, #1a1a1a);
  --text:      var(--tg-theme-text-color, #f5f3ee);
  --text-dim:  var(--tg-theme-hint-color, #8a8a8a);
  --accent:    var(--tg-theme-button-color, #009EB1);
  --accent-text: var(--tg-theme-button-text-color, #ffffff);
  --link:      var(--tg-theme-link-color, #009EB1);
  --danger:    #FF6B5B;
  --warn:      #f3a93c;
  --good:      #2ecc71;
  --easy:      #56b4ff;

  --radius: 14px;
  --shadow: 0 8px 24px rgba(0,0,0,.18);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", system-ui, sans-serif;
  min-height: 100vh;
  overscroll-behavior-y: contain;
}
body { padding: env(safe-area-inset-top) 0 env(safe-area-inset-bottom); }

.app {
  max-width: 560px;
  margin: 0 auto;
  padding: 16px;
}

/* ========= header ========= */
.app-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 4px 16px;
}
.app-head h1 {
  margin: 0; font-size: 18px; font-weight: 700;
}
.app-head .greet { color: var(--text-dim); font-size: 13px; }

/* ========= nav ========= */
.tabs {
  display: flex; gap: 4px;
  background: var(--bg-2);
  border-radius: var(--radius);
  padding: 4px;
  margin-bottom: 16px;
}
.tabs button {
  flex: 1;
  background: transparent;
  border: 0; padding: 9px 6px;
  color: var(--text-dim);
  font-size: 13px; font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
}
.tabs button.active {
  background: var(--bg);
  color: var(--text);
  box-shadow: 0 1px 2px rgba(0,0,0,.2);
}

/* ========= home ========= */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}
.stat {
  background: var(--bg-2);
  border-radius: var(--radius);
  padding: 14px 10px;
  text-align: center;
}
.stat .n {
  font-size: 26px; font-weight: 800; line-height: 1;
}
.stat .l {
  font-size: 11px; color: var(--text-dim); margin-top: 6px;
  text-transform: uppercase; letter-spacing: .5px;
}
.stat.due .n   { color: var(--danger); }
.stat.new .n   { color: var(--easy); }
.stat.done .n  { color: var(--good); }

.cta {
  display: block; width: 100%;
  background: var(--accent); color: var(--accent-text);
  border: 0; border-radius: var(--radius);
  padding: 16px; font-size: 16px; font-weight: 700;
  cursor: pointer; box-shadow: var(--shadow);
}
.cta:disabled { opacity: .5; cursor: not-allowed; }
.cta.secondary {
  background: var(--bg-2); color: var(--text);
  box-shadow: none;
}
.muted { color: var(--text-dim); font-size: 13px; text-align: center; padding: 24px 0; }

.section-title {
  font-size: 12px; color: var(--text-dim); text-transform: uppercase;
  letter-spacing: .8px; margin: 24px 0 8px 4px;
}

/* ========= card view ========= */
.card-stage {
  display: flex; flex-direction: column;
  min-height: calc(100dvh - 140px);
  padding: 8px 0;
}
.card-meta {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; color: var(--text-dim);
  margin-bottom: 12px;
}
.dir-badge {
  background: var(--bg-2);
  padding: 4px 10px; border-radius: 999px;
  font-weight: 600; letter-spacing: .3px;
}
.dir-badge.ru2en { color: var(--warn); }
.dir-badge.en2ru { color: var(--easy); }

.card {
  flex: 1;
  background: var(--bg-2);
  border-radius: 22px;
  padding: 32px 20px;
  display: flex; flex-direction: column; align-items: center;
  justify-content: center;
  text-align: center;
  margin-bottom: 16px;
  min-height: 240px;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
}
.card .word {
  font-size: 32px; font-weight: 800; line-height: 1.15;
  margin-bottom: 8px; word-break: break-word;
}
.card .ipa {
  color: var(--text-dim); font-size: 16px;
  font-family: "SF Mono", "JetBrains Mono", ui-monospace, monospace;
  margin-bottom: 6px;
}
.card .audio-btn {
  background: transparent; border: 1px solid var(--text-dim);
  color: var(--text); font-size: 18px;
  width: 40px; height: 40px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer; margin-top: 12px;
}
.card .audio-btn:active { background: var(--accent); border-color: var(--accent); }
.card .answer {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,.08);
  width: 100%;
}
.card .answer .ru {
  font-size: 22px; font-weight: 600; color: var(--text);
  margin-bottom: 12px;
}
.card .example {
  font-size: 14px; color: var(--text-dim);
  font-style: italic;
  margin-top: 8px;
  padding: 8px 12px;
  background: rgba(255,255,255,.04);
  border-radius: 8px;
}
.card .example .en { color: var(--text); font-style: normal; }
.card .topic {
  position: absolute; top: 16px; left: 50%; transform: translateX(-50%);
  font-size: 11px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: .5px;
}

.flip-hint {
  text-align: center; color: var(--text-dim);
  font-size: 13px; margin-bottom: 16px;
}

.rate-row {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}
.rate-btn {
  background: var(--bg-2); border: 0; color: var(--text);
  padding: 14px 4px; border-radius: var(--radius);
  font-size: 13px; font-weight: 700;
  cursor: pointer; display: flex; flex-direction: column; gap: 4px;
  align-items: center; justify-content: center;
  transition: transform .08s;
}
.rate-btn:active { transform: scale(.96); }
.rate-btn .iv { font-size: 11px; opacity: .75; font-weight: 500; }
.rate-btn.again { background: rgba(255,107,91,.15); color: var(--danger); }
.rate-btn.hard  { background: rgba(243,169,60,.15); color: var(--warn); }
.rate-btn.good  { background: rgba(46,204,113,.15); color: var(--good); }
.rate-btn.easy  { background: rgba(86,180,255,.15); color: var(--easy); }

/* ========= add view ========= */
.form-group { margin-bottom: 14px; }
.form-group label {
  display: block; font-size: 12px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: .5px; margin-bottom: 6px;
}
.form-group input, .form-group textarea {
  width: 100%; background: var(--bg-2); color: var(--text);
  border: 1px solid transparent; border-radius: 10px;
  padding: 12px 14px; font-size: 15px;
  font-family: inherit;
}
.form-group input:focus, .form-group textarea:focus {
  outline: none; border-color: var(--accent);
}
.toggle-row {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-2); padding: 12px 14px; border-radius: 10px;
  margin-bottom: 14px;
  cursor: pointer;
}
.toggle-row input { margin: 0; accent-color: var(--accent); transform: scale(1.2); }
.toggle-row .lbl { flex: 1; font-size: 14px; }
.toggle-row .sub { display: block; font-size: 12px; color: var(--text-dim); margin-top: 2px; }

/* ========= browse list ========= */
.search {
  width: 100%; background: var(--bg-2); color: var(--text);
  border: 0; border-radius: 10px; padding: 11px 14px;
  font-size: 15px; margin-bottom: 12px;
}
.list { display: flex; flex-direction: column; gap: 6px; }
.list-item {
  background: var(--bg-2); border-radius: 10px;
  padding: 10px 14px;
  display: flex; justify-content: space-between; align-items: center;
}
.list-item .en { font-weight: 600; }
.list-item .ru { color: var(--text-dim); font-size: 13px; margin-top: 2px; }
.list-item .ipa { color: var(--text-dim); font-size: 12px; margin-left: 8px; }

/* ========= toast ========= */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: var(--bg);
  padding: 10px 16px; border-radius: 10px;
  font-size: 14px; font-weight: 600;
  box-shadow: var(--shadow);
  z-index: 1000;
  animation: toast-in .2s ease;
}
@keyframes toast-in {
  from { opacity: 0; transform: translate(-50%, 8px); }
  to   { opacity: 1; transform: translate(-50%, 0);   }
}

/* ========= done view ========= */
.done {
  text-align: center; padding: 60px 20px;
}
.done .emoji { font-size: 56px; margin-bottom: 12px; }
.done h2 { margin: 0 0 8px; font-size: 22px; }
.done p { color: var(--text-dim); margin: 0 0 24px; }