:root {
  /* Lime yeşil buton (görseldeki CONTINUE) */
  --green: #9ed64a;
  --green-hover: #a9e058;
  --green-shadow: #79b02f;    /* buton 3D alt gölge */
  --green-bright: #b7ea6d;
  --on-green: #17202e;        /* yeşil üstündeki koyu yazı */

  --orange: #ff9600;
  --orange-shadow: #cc7800;
  --yellow: #ffc800;
  --yellow-shadow: #cc9f00;

  --red: #ff4b4b;
  --red-shadow: #d63a3a;

  --blue: #1cb0f6;
  --blue-shadow: #1489c2;

  --purple: #6a4bf2;
  --purple-shadow: #4a2fc7;
  --violet: #8b63f7;

  /* Koyu tema nötrleri (görseldeki koyu zemin) */
  --bg1: #12161f;
  --bg2: #191f2c;
  --surface: #1b2231;     /* kartlar */
  --surface-2: #232c3d;   /* iç yüzeyler / hover */
  --border: #303a4d;
  --border-strong: #40506a;
  --text: #eef2f8;
  --muted: #a2adc2;
  --faint: #7381a0;

  --radius: 16px;
}

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

/* html'e koyu zemin: mobilde overscroll ("bounce") sırasında arkada
   beyazlık görünmez; adres çubuğu açılıp kapanınca da hep koyu kalır. */
html {
  background: var(--bg1);
  /* Sayfa dışına taşan "lastik gibi zıplama"yı kapat */
  overscroll-behavior: none;
  /* Yatay kaymayı engelle */
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: "Nunito", system-ui, sans-serif;
  color: var(--text);
  /* Dinamik viewport yüksekliği: mobil adres çubuğu değişince zıplama olmaz.
     100vh fallback, destekleyen tarayıcılarda 100dvh. */
  min-height: 100vh;
  min-height: 100dvh;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  overscroll-behavior: none;
  -webkit-font-smoothing: antialiased;
  /* Dokununca gri parlama olmasın (mobilde daha temiz his) */
  -webkit-tap-highlight-color: transparent;
  /* Çentikli telefonlarda güvenli alanları hesaba kat */
  padding:
    max(18px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right))
    max(40px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
  background:
    radial-gradient(1000px 500px at 15% -10%, #202a3d 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #1e2a40 0%, transparent 50%),
    linear-gradient(160deg, var(--bg1), var(--bg2));
  /* Zemin, kaydırırken sabit kalsın (üst/alt boşlukta renk kopması olmaz) */
  background-attachment: fixed;
  background-color: var(--bg1);
}

.app { max-width: 720px; margin: 0 auto; }

/* ---------- Topbar ---------- */
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 2px 2px 18px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo {
  font-size: 30px; width: 54px; height: 54px; flex: none;
  display: grid; place-items: center; border-radius: 16px;
  background: var(--green); box-shadow: 0 4px 0 var(--green-shadow);
}
.brand h1 { font-family: "Fredoka", sans-serif; font-size: 25px; line-height: 1; color: var(--green); font-weight: 700; }
.brand p { font-size: 13px; color: var(--muted); margin-top: 4px; font-weight: 800; }

.lang-toggle {
  background: var(--surface); border: 2px solid var(--border); border-bottom-width: 4px;
  padding: 9px 16px; border-radius: 14px; cursor: pointer;
  display: flex; align-items: center; gap: 8px; font-size: 20px; line-height: 1;
  transition: transform .08s, background .12s, border-color .12s;
}
.lang-toggle:hover { background: var(--surface-2); border-color: var(--green); }
.lang-toggle:active { transform: translateY(2px); }
.lang-toggle .flag-arrow { font-size: 15px; color: var(--muted); font-weight: 900; }
.lang-toggle .flag { display: inline-flex; }
.lang-toggle .flag svg {
  width: 30px; height: 20px; border-radius: 4px; display: block;
  box-shadow: 0 0 0 1px rgba(255,255,255,.15);
}

/* Üst sağ aksiyon grubu (arayüz dili + yön bayrağı) */
.top-actions { display: flex; align-items: center; gap: 10px; }

/* Arayüz dili seçici */
.uilang { position: relative; }
.uilang-btn {
  background: var(--surface); border: 2px solid var(--border); border-bottom-width: 4px;
  color: var(--text); padding: 9px 12px; border-radius: 14px; cursor: pointer;
  display: flex; align-items: center; gap: 6px; line-height: 1;
  font-family: "Nunito", sans-serif; font-weight: 900; font-size: 14px;
  transition: background .15s, border-color .15s, transform .05s;
}
.uilang-btn:hover { background: var(--surface-2); border-color: var(--green); }
.uilang-btn:active { transform: translateY(2px); }
.uilang-globe { font-size: 17px; }
.uilang-caret { font-size: 11px; color: var(--muted); }

.uilang-menu {
  position: absolute; top: calc(100% + 8px); right: 0; z-index: 30;
  background: var(--surface); border: 2px solid var(--border); border-radius: 14px;
  padding: 6px; min-width: 168px; display: flex; flex-direction: column; gap: 2px;
  box-shadow: 0 12px 28px rgba(0,0,0,.35);
}
.uilang-menu.hidden { display: none; }
.uilang-menu button {
  display: flex; align-items: center; gap: 10px; width: 100%;
  background: transparent; border: none; cursor: pointer; text-align: left;
  padding: 9px 10px; border-radius: 10px; color: var(--text);
  font-family: "Nunito", sans-serif; font-weight: 800; font-size: 14px;
}
.uilang-menu button:hover { background: var(--surface-2); }
.uilang-menu button.active { background: var(--surface-2); color: var(--green); }
.uilang-menu .flag { display: inline-flex; flex: none; }
.uilang-menu .flag svg {
  width: 26px; height: 17px; border-radius: 3px; display: block;
  box-shadow: 0 0 0 1px rgba(255,255,255,.15);
}

/* Oyun modu (havuz) butonu */
.pool-toggle {
  background: var(--surface-2); border: 2px solid var(--border); border-bottom-width: 4px;
  color: var(--text); padding: 8px 14px; border-radius: 12px; cursor: pointer;
  font-family: "Nunito", sans-serif; font-weight: 900; font-size: 13px;
  transition: transform .08s, background .12s, border-color .12s;
}
.pool-toggle:hover { background: var(--surface); border-color: var(--green); }
.pool-toggle:active { transform: translateY(2px); }

/* Yeterli kelime yoksa gösterilen mesaj */
.need-more {
  background: var(--surface-2); border: 2px dashed var(--border); border-radius: 16px;
  padding: 30px 20px; text-align: center; font-weight: 800; color: var(--muted); line-height: 1.6;
}
.need-more b { color: var(--text); }

/* ---------- Tabs ---------- */
.tabs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 22px; }
.tab {
  border: 2px solid var(--border); border-bottom-width: 4px; background: var(--surface);
  color: var(--muted); padding: 12px 6px; border-radius: 14px;
  font-family: "Nunito", sans-serif; font-weight: 900; font-size: 13px;
  cursor: pointer; transition: all .12s; text-transform: uppercase; letter-spacing: .3px;
}
.tab:hover { background: var(--surface-2); color: var(--text); }
.tab.active { background: var(--green); border-color: var(--green-shadow); color: var(--on-green); box-shadow: 0 4px 0 var(--green-shadow); }

/* ---------- Panels ---------- */
.panel { display: none; animation: fade .22s ease; }
.panel.active { display: block; }
@keyframes fade { from { opacity: 0; transform: translateY(8px);} to {opacity:1; transform:none;} }

.section-title { font-family: "Fredoka", sans-serif; color: var(--text); font-size: 22px; margin-bottom: 16px; font-weight: 700; }

/* ---------- Card base ---------- */
.play-setup, .quiz, .add-card {
  background: var(--surface); border: 2px solid var(--border); border-radius: 20px;
  padding: 24px;
}

/* ---------- Play setup ---------- */
.setup-group { margin-bottom: 22px; }
.setup-label {
  font-weight: 900; color: var(--faint); margin-bottom: 12px; font-size: 12px;
  text-transform: uppercase; letter-spacing: 1px;
}
.option-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.mode-card {
  border: 2px solid var(--border); border-bottom-width: 4px; background: var(--surface-2);
  border-radius: 16px; padding: 18px 14px; cursor: pointer; text-align: center;
  transition: all .12s; display: flex; flex-direction: column; gap: 5px; align-items: center;
  font-family: "Nunito", sans-serif; position: relative;
}
.mode-card:hover { border-color: var(--border-strong); }
.mode-card.selected { border-color: var(--green); background: rgba(88,204,2,.14); }
.mode-card.selected::after {
  content: "✓"; position: absolute; top: 10px; right: 12px;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--green); color: #fff; font-weight: 900; font-size: 13px;
  display: grid; place-items: center;
}
.mode-emoji { font-size: 26px; }
.mode-name { font-weight: 900; font-size: 15px; color: var(--text); }
.mode-desc { font-size: 12.5px; color: var(--muted); font-weight: 800; }

/* ---------- Duolingo 3D Buttons ---------- */
.btn-primary {
  background: var(--green); color: var(--on-green); border: none;
  padding: 16px 22px; border-radius: var(--radius);
  font-family: "Nunito", sans-serif; font-size: 16px; font-weight: 900;
  cursor: pointer; width: 100%; text-transform: uppercase; letter-spacing: 1px;
  box-shadow: 0 5px 0 var(--green-shadow);
  transition: filter .12s, transform .06s, box-shadow .06s;
}
.btn-primary:hover { background: var(--green-hover); }
.btn-primary:active { transform: translateY(5px); box-shadow: 0 0 0 var(--green-shadow); }
.btn-primary.big { margin-top: 8px; }

.btn-secondary {
  background: var(--orange); color: #fff; border: none;
  padding: 16px 18px; border-radius: var(--radius);
  font-family: "Nunito", sans-serif; font-size: 15px; font-weight: 900;
  cursor: pointer; width: 100%; text-transform: uppercase; letter-spacing: .8px;
  box-shadow: 0 5px 0 var(--orange-shadow);
  transition: filter .12s, transform .06s, box-shadow .06s;
}
.btn-secondary:hover { filter: brightness(1.06); }
.btn-secondary:active { transform: translateY(5px); box-shadow: 0 0 0 var(--orange-shadow); }

.btn-ghost {
  background: var(--surface-2); border: 2px solid var(--border); border-bottom-width: 3px; color: var(--muted);
  padding: 8px 16px; border-radius: 12px; font-weight: 900; cursor: pointer; font-size: 13px;
  text-transform: uppercase; letter-spacing: .4px; transition: all .12s;
}
.btn-ghost:hover { color: var(--red); border-color: var(--red-shadow); }

/* ---------- Quiz ---------- */
.quiz-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.quiz-progress { display: flex; gap: 8px; flex-wrap: wrap; }
.badge {
  background: rgba(28,176,246,.16); color: #7fd0ff; border: 2px solid rgba(28,176,246,.4);
  padding: 5px 13px; border-radius: 999px; font-weight: 900; font-size: 13px;
}
.badge.streak { background: rgba(255,150,0,.16); color: #ffbe5c; border-color: rgba(255,150,0,.4); }

/* Soru kartı: palet MOR */
.question-card {
  background: linear-gradient(135deg, var(--purple), var(--violet));
  border: none; border-radius: 18px; padding: 30px 22px; text-align: center; margin-bottom: 22px;
  box-shadow: 0 6px 0 var(--purple-shadow);
}
.question-label { font-size: 12px; color: rgba(255,255,255,.92); font-weight: 900; text-transform: uppercase; letter-spacing: 1.2px; }
.question-word { font-family: "Fredoka", sans-serif; font-size: 38px; margin-top: 10px; color: #fff; word-break: break-word; }

/* Cevap butonları: palet YEŞİL (GET STARTED stili) */
.options { display: grid; gap: 14px; }
.option {
  background: var(--green); border: none; border-radius: 16px;
  padding: 16px 18px; font-size: 17px; font-weight: 900; cursor: pointer;
  text-align: left; transition: filter .1s, transform .06s, box-shadow .06s;
  font-family: "Nunito", sans-serif; color: var(--on-green);
  display: flex; align-items: center; gap: 14px;
  box-shadow: 0 5px 0 var(--green-shadow);
}
.option:hover:not(:disabled) { background: var(--green-hover); }
.option:active:not(:disabled) { transform: translateY(5px); box-shadow: 0 0 0 var(--green-shadow); }
.option:disabled { cursor: default; }
.option .opt-index {
  width: 30px; height: 30px; flex: none; background: rgba(23,32,46,.18); color: var(--on-green);
  border-radius: 9px; display: grid; place-items: center; font-weight: 900; font-size: 14px;
}
.option.correct {
  background: var(--on-green); color: var(--green);
  box-shadow: 0 5px 0 #0b1220;
}
.option.correct .opt-index { background: var(--green); color: var(--on-green); }
.option.correct::after {
  content: "✓";
  margin-left: auto;
  width: 30px; height: 30px; flex: none;
  border-radius: 50%;
  background: var(--green); color: var(--on-green);
  display: grid; place-items: center;
  font-size: 17px; font-weight: 900;
  transform-origin: center;
  animation: pop-check .5s cubic-bezier(.18, 1.5, .4, 1) both;
}
@keyframes pop-check {
  0%   { transform: scale(0) rotate(-45deg); opacity: 0; }
  55%  { transform: scale(1.35) rotate(6deg); opacity: 1; }
  100% { transform: scale(1) rotate(0); opacity: 1; }
}
.option.wrong {
  background: var(--red); color: #fff; box-shadow: 0 5px 0 var(--red-shadow); animation: shake .35s;
}
.option.wrong .opt-index { background: rgba(255,255,255,.28); color: #fff; }
@keyframes shake { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-6px)} 75%{transform:translateX(6px)} }

/* ---------- Feedback ---------- */
.feedback { margin-top: 20px; }
.feedback-inner { border-radius: 16px; padding: 16px; font-weight: 900; text-align: center; font-size: 16px; }
.feedback-inner.good { background: rgba(88,204,2,.18); color: var(--green-bright); border: 2px solid rgba(88,204,2,.4); }
.feedback-inner.bad { background: rgba(255,75,75,.16); color: #ff9090; border: 2px solid rgba(255,75,75,.4); }
.feedback-inner .meaning { display:block; margin-top:8px; font-size: 15px; font-weight: 900; }

/* ---------- Add ---------- */
.field { margin-bottom: 18px; }
.field label { display: block; font-weight: 900; color: var(--faint); margin-bottom: 8px; font-size: 12px; text-transform: uppercase; letter-spacing: 1px; }
.field input {
  width: 100%; padding: 15px 16px; border-radius: 14px; border: 2px solid var(--border);
  font-size: 16px; font-family: "Nunito", sans-serif; font-weight: 700; transition: border .12s;
  background: var(--surface-2); color: var(--text);
}
.field input::placeholder { color: var(--faint); }
.field input:focus { outline: none; border-color: var(--green); }

/* Liste halinde ekleme kutusu */
.bulk-card { margin-top: 18px; }
.bulk-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; }
.fmt-toggle {
  background: var(--surface-2); border: 2px solid var(--border); border-bottom-width: 4px;
  color: var(--text); padding: 7px 12px; border-radius: 12px; cursor: pointer;
  font-family: "Nunito", sans-serif; font-weight: 900; font-size: 12.5px; white-space: nowrap;
  transition: transform .08s, background .12s, border-color .12s;
}
.fmt-toggle:hover { background: var(--surface); border-color: var(--green); }
.fmt-toggle:active { transform: translateY(2px); }

/* Havuz / zor kelimeler indirme araç çubuğu */
.list-tools {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin: 4px 0 14px;
}
.list-tools .dl-btn { padding: 10px 16px; font-size: 14px; white-space: nowrap; }
.list-tools .fmt-toggle { padding: 9px 12px; }
@media (max-width: 520px) {
  .list-tools .dl-btn { flex: 1 1 auto; }
}

/* Tekil eklemede yinelenen kelime onayı */
.hint.confirm { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; color: var(--text); }
.hint-actions { display: inline-flex; gap: 8px; }
.mini-btn {
  border: 2px solid var(--border); border-bottom-width: 3px; background: var(--surface-2);
  color: var(--muted); padding: 6px 14px; border-radius: 10px; cursor: pointer;
  font-family: "Nunito", sans-serif; font-weight: 900; font-size: 12.5px; transition: all .12s;
}
.mini-btn:hover { color: var(--text); border-color: var(--border-strong); }
.mini-btn.ok { background: var(--green); color: var(--on-green); border-color: var(--green-shadow); }
.mini-btn.ok:hover { filter: brightness(1.05); color: var(--on-green); }

/* Toplu ekleme çakışma ekranı */
.modal-overlay {
  position: fixed; inset: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  padding: 20px; background: rgba(8, 11, 18, 0.72);
  backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px);
}
.modal-overlay.hidden { display: none; }
.modal-card {
  width: 100%; max-width: 440px; background: var(--surface);
  border: 2px solid var(--border-strong); border-radius: var(--radius);
  padding: 22px 22px 18px; box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  animation: modalPop 0.16s ease-out;
}
@keyframes modalPop { from { transform: scale(0.94); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.modal-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.modal-head h3 { margin: 0; font-size: 19px; font-weight: 900; color: var(--text); }
.modal-progress {
  font-weight: 900; font-size: 13px; color: var(--on-green);
  background: var(--green); padding: 3px 10px; border-radius: 999px; white-space: nowrap;
}
.modal-sub { margin: 6px 0 16px; color: var(--muted); font-size: 13.5px; font-weight: 700; }
.modal-body { margin-bottom: 18px; }
.conflict-word {
  font-size: 24px; font-weight: 900; color: var(--text);
  text-align: center; margin-bottom: 14px;
}
.conflict-row {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 14px; border-radius: 12px; margin-bottom: 8px;
  border: 2px solid var(--border);
}
.conflict-row.old { background: var(--surface-2); opacity: 0.85; }
.conflict-row.new { background: rgba(136, 197, 65, 0.12); border-color: var(--green); }
.conflict-tag {
  font-size: 11px; font-weight: 900; text-transform: uppercase; letter-spacing: 0.5px;
  color: var(--muted); min-width: 56px;
}
.conflict-row.new .conflict-tag { color: var(--green); }
.conflict-val { font-size: 16px; font-weight: 800; color: var(--text); }
.conflict-hard { margin-top: 6px; text-align: center; font-size: 13px; font-weight: 800; color: var(--gold, #e0a83e); }
.modal-actions { display: flex; gap: 12px; }
.modal-actions .btn-primary { flex: 1 1 auto; padding: 13px 18px; }
.modal-actions .mini-btn { padding: 13px 20px; }
.modal-allrow {
  display: flex; justify-content: space-between; gap: 12px;
  margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--border);
}
.link-btn {
  background: none; border: none; cursor: pointer; padding: 4px 2px;
  font-family: "Nunito", sans-serif; font-weight: 900; font-size: 13px;
  color: var(--muted); transition: color 0.12s;
}
.link-btn:hover { color: var(--text); }
.link-btn.accent { color: var(--green); }
.link-btn.accent:hover { filter: brightness(1.12); }

.bulk-textarea {
  width: 100%; min-height: 150px; resize: vertical; display: block;
  padding: 14px 16px; border-radius: 14px; border: 2px solid var(--border);
  font-size: 16px; font-family: "Nunito", sans-serif; font-weight: 700; line-height: 1.5;
  background: var(--surface-2); color: var(--text); margin-bottom: 14px;
}
.bulk-textarea::placeholder { color: var(--faint); }
.bulk-textarea:focus { outline: none; border-color: var(--green); }
.add-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.mini-note {
  margin-top: 18px; background: var(--surface-2); border: 2px solid var(--border); border-radius: 16px;
  padding: 15px 18px; font-weight: 800; font-size: 14px; color: var(--muted);
}

.backup-card {
  margin-top: 16px; background: var(--surface); border: 2px solid var(--border); border-radius: 20px;
  padding: 22px;
}
.backup-title { font-family: "Fredoka", sans-serif; font-size: 18px; color: var(--text); margin-bottom: 8px; font-weight: 700; }
.backup-desc { color: var(--muted); font-weight: 700; font-size: 14px; line-height: 1.55; margin-bottom: 16px; }
.backup-desc b { color: var(--green); }
.backup-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 520px) { .backup-actions { grid-template-columns: 1fr; } }

.sync-code-box {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  background: var(--surface-2); border: 2px solid var(--border); border-radius: 14px;
  padding: 12px 16px; margin-bottom: 12px; font-weight: 800; color: var(--muted);
}
.sync-code-box b {
  font-family: "Fredoka", sans-serif; font-size: 18px; letter-spacing: 1px;
  color: var(--green); user-select: all; word-break: break-all;
}
.mini-copy {
  margin-left: auto; background: var(--surface); border: 2px solid var(--border);
  color: var(--text); border-radius: 10px; padding: 6px 12px; font-weight: 900;
  font-size: 12px; cursor: pointer; transition: border-color .12s;
}
.mini-copy:hover { border-color: var(--green); }
.sync-disc { width: 100%; }

/* ---------- Word lists ---------- */
.pool-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 4px; }
.search {
  padding: 12px 16px; border-radius: 14px; border: 2px solid var(--border); font-size: 16px;
  font-family: "Nunito", sans-serif; font-weight: 800; min-width: 200px;
  background: var(--surface); color: var(--text);
}
.search::placeholder { color: var(--faint); }
.search:focus { outline: none; border-color: var(--green); }
.count-line { color: var(--muted); font-weight: 900; margin: 6px 0 16px; }

.word-list { display: grid; gap: 12px; }
.word-item {
  background: var(--surface); border: 2px solid var(--border); border-bottom-width: 4px; border-radius: 16px; padding: 15px 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px; transition: background .12s;
}
.word-item:hover { background: var(--surface-2); }
.word-item.is-hard { border-left: 6px solid var(--orange); }
.word-texts { min-width: 0; }
.word-en { font-family: "Fredoka", sans-serif; font-size: 19px; color: var(--text); }
.word-tr { color: var(--muted); font-weight: 800; font-size: 14px; margin-top: 2px; }
.word-actions { display: flex; gap: 8px; flex: none; }
.icon-btn {
  border: 2px solid var(--border); border-bottom-width: 3px; background: var(--surface-2);
  width: 42px; height: 42px; border-radius: 12px; cursor: pointer;
  font-size: 17px; display: grid; place-items: center; transition: transform .1s, background .12s;
}
.icon-btn:active { transform: translateY(2px); }
.icon-fire.on { background: var(--yellow); border-color: var(--yellow-shadow); }
.icon-del:hover { background: rgba(255,75,75,.2); border-color: var(--red-shadow); }

.empty {
  background: var(--surface); border: 2px dashed var(--border); border-radius: 18px; padding: 34px 20px;
  text-align: center; font-weight: 900; color: var(--muted);
}
.empty .emoji { font-size: 44px; display: block; margin-bottom: 10px; }

/* ---------- Misc ---------- */
.hint { margin-top: 14px; text-align: center; font-weight: 900; min-height: 20px; }
.hint.error { color: #ff9090; }
.hint.ok { color: var(--green-bright); }
.hidden { display: none !important; }

.footer { text-align: center; color: var(--faint); font-size: 13px; margin-top: 28px; font-weight: 800; }

.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%) translateY(20px);
  background: #0a1730; border: 2px solid var(--border);
  color: #fff; padding: 13px 24px; border-radius: 999px;
  font-weight: 900; opacity: 0; pointer-events: none; transition: all .3s; z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 520px) {
  .brand p { display: none; }
  .brand-logo { width: 44px; height: 44px; font-size: 24px; }
  .brand h1 { font-size: 21px; }
  .tab { font-size: 11px; padding: 11px 4px; }
  .option-cards, .add-actions { grid-template-columns: 1fr; }
  .question-word { font-size: 30px; }

  /* Daha derli toplu (tek ekran) his için boşlukları azalt */
  .topbar { padding-bottom: 14px; gap: 8px; }
  .tabs { gap: 8px; margin-bottom: 16px; }
  .quiz, .add-card { padding: 18px; }
  .question-card { padding: 22px 18px; }

  /* Üst sağ butonlar: sıkışınca alta değil, kompakt kalsın */
  .top-actions { gap: 8px; }
  .uilang-btn { padding: 8px 10px; font-size: 13px; }
  .uilang-caret { display: none; }
  .lang-toggle { padding: 8px 12px; }

  /* Açılır dil menüsü ekranın dışına taşmasın */
  .uilang-menu { min-width: 150px; }

  /* Havuz aramasında tam genişlik */
  .pool-head .search { flex: 1 1 100%; min-width: 0; }
}

@media (max-width: 360px) {
  .tab { font-size: 10px; letter-spacing: 0; padding: 10px 3px; }
  .brand-logo { width: 40px; height: 40px; }
}