:root {
  --bg: #0f172a;
  --bg-2: #1e293b;
  --card: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --ok: #22c55e;
  --bad: #ef4444;
  --border: #334155;
  --card-soft: #172033;
  --radius: 12px;
  --danger: #ef4444;
}

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

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: linear-gradient(160deg, var(--bg), #312e81 90%);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 24px;
}

.app { width: 100%; max-width: 620px; }

.screen { display: none; }
.screen.active { display: block; animation: fade .35s ease; }

@keyframes fade {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 32px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, .45);
}

.card.center { text-align: center; }

.hero { text-align: center; }
.logo { font-size: 56px; }

h1 {
  font-size: 34px;
  margin: 8px 0 16px;
  background: linear-gradient(90deg, #818cf8, #c4b5fd);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

h2 { font-size: 22px; margin-bottom: 18px; }

.lead { color: var(--muted); line-height: 1.6; margin-bottom: 24px; }
.hint { color: var(--muted); font-size: 13px; margin-top: 14px; }
.hint a { color: #a5b4fc; }

.field-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin: 20px 0 8px;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.topic-grid.grid-4 { grid-template-columns: repeat(4, 1fr); }

.chip {
  padding: 12px 8px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--text);
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
  transition: .15s;
}
.chip:hover { border-color: var(--primary); }
.chip.selected {
  background: var(--primary);
  border-color: var(--primary);
  font-weight: 600;
}

input[type="text"], input[type="password"] {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 15px;
}
input:focus { outline: none; border-color: var(--primary); }

.apikey-box {
  margin-top: 22px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
}
.apikey-box summary { cursor: pointer; font-size: 14px; color: var(--muted); }
.apikey-box input { margin-top: 10px; }

.btn {
  padding: 13px 22px;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: .15s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }
.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover { color: var(--text); border-color: var(--primary); }

.actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 26px;
}

.error-msg { color: var(--bad); font-size: 14px; margin-top: 12px; min-height: 18px; }

/* Sekmeler (kurulum ekranı) */
.tabs {
  display: flex;
  gap: 6px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 5px;
  margin-bottom: 8px;
}
.tab {
  flex: 1;
  padding: 10px 8px;
  border: none;
  background: transparent;
  color: var(--muted);
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: .15s;
}
.tab:hover { color: var(--text); }
.tab.active {
  background: var(--primary);
  color: #fff;
}
.tab-panel { display: none; animation: fade .25s ease; }
.tab-panel.active { display: block; }
.tab-panel .field-label:first-child { margin-top: 12px; }

/* Ana sayfa profil şeridi */
.profile-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 14px;
  margin-bottom: 22px;
  text-align: left;
}
.profile-avatar {
  font-size: 30px;
  line-height: 1;
  flex-shrink: 0;
}
.profile-info { flex: 1; min-width: 0; }
.profile-line {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 6px;
}
.profile-level { font-weight: 700; font-size: 14px; }
.profile-title { color: var(--muted); font-size: 13px; }
.profile-xp-bar {
  height: 7px;
  background: var(--bg);
  border-radius: 99px;
  overflow: hidden;
}
#profile-xp-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #818cf8, #c4b5fd);
  border-radius: 99px;
  transition: width .5s ease;
}
.profile-stars {
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

/* Karakter kartları */
.char-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.char-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 16px 10px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--text);
  border-radius: 12px;
  cursor: pointer;
  text-align: center;
  transition: .15s;
}
.char-card:hover { border-color: var(--primary); transform: translateY(-2px); }
.char-card.selected {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.18);
  box-shadow: 0 0 0 1px var(--primary);
}
.char-emoji { font-size: 34px; line-height: 1; }
.char-name { font-weight: 700; font-size: 15px; }
.char-perk { font-size: 12px; color: var(--muted); line-height: 1.3; }

.badge-char {
  color: #c4b5fd;
  font-weight: 700;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.4);
}

/* Sonuç: yıldızlar */
.result-stars {
  text-align: center;
  font-size: 40px;
  line-height: 1;
  margin: 6px 0 4px;
  letter-spacing: 6px;
}
.result-stars .star.filled { color: #fbbf24; }
.result-stars .star.empty { color: var(--border); }

/* Sonuç: XP / seviye */
.xp-result { margin: 14px 0 4px; }
.levelup-banner {
  text-align: center;
  font-weight: 700;
  color: #c4b5fd;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.45);
  border-radius: 10px;
  padding: 10px;
  margin-bottom: 10px;
  animation: pop .5s ease;
}
.xp-gain {
  text-align: center;
  font-weight: 700;
  font-size: 18px;
  color: #a5b4fc;
  margin-bottom: 8px;
}
.xp-line {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}
.xp-bar {
  height: 10px;
  background: var(--bg);
  border-radius: 99px;
  overflow: hidden;
}
.xp-bar-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #818cf8, #c4b5fd);
  border-radius: 99px;
  transition: width .6s ease;
}

/* Jokerler */
.jokers {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin: 6px 0 4px;
}
.joker {
  padding: 10px 6px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--text);
  border-radius: 10px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: .15s;
}
.joker:hover:not(:disabled) {
  border-color: var(--primary);
  transform: translateY(-2px);
}
.joker:disabled {
  opacity: .35;
  cursor: not-allowed;
}
.joker.used {
  text-decoration: line-through;
  opacity: .3;
}

/* İpucu kutusu */
.hint-text {
  background: rgba(251, 191, 36, 0.12);
  border: 1px solid rgba(251, 191, 36, 0.4);
  color: #fcd34d;
  border-radius: 10px;
  padding: 10px 12px;
  margin: 4px 0;
  font-size: 14px;
  animation: fade .25s ease;
}

/* 50/50 ile elenen şık */
.option.eliminated {
  opacity: .25;
  text-decoration: line-through;
  pointer-events: none;
}

/* Donmuş geri sayım */
.badge-countdown.frozen {
  color: #fff;
  background: #38bdf8;
  border-color: #38bdf8;
  animation: none;
}

/* Sonuç: yeni rozetler */
.achievements-result {
  text-align: center;
  margin: 12px 0 4px;
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid rgba(251, 191, 36, 0.4);
  border-radius: 12px;
  padding: 12px;
  animation: pop .5s ease;
}
.ach-result-title { font-weight: 700; color: #fcd34d; margin-bottom: 8px; }
.ach-result-list { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.ach-chip {
  background: rgba(251, 191, 36, 0.2);
  border: 1px solid rgba(251, 191, 36, 0.5);
  color: #fde68a;
  border-radius: 99px;
  padding: 5px 12px;
  font-size: 13px;
  font-weight: 600;
}

/* İstatistik ekranı */
.stats-profile { margin-bottom: 18px; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 8px;
}
.stat-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 8px;
}
.stat-emoji { font-size: 22px; }
.stat-val { font-size: 22px; font-weight: 700; }
.stat-lbl { font-size: 12px; color: var(--muted); }

.achievements-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.ach {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 3px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 10px;
  transition: .15s;
}
.ach.earned {
  border-color: rgba(251, 191, 36, 0.5);
  background: rgba(251, 191, 36, 0.08);
}
.ach.locked { opacity: .5; }
.ach-emoji { font-size: 28px; line-height: 1; }
.ach-name { font-weight: 700; font-size: 14px; }
.ach-desc { font-size: 12px; color: var(--muted); line-height: 1.3; }

/* Nasıl Oynanır? özellik kartları */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 18px 0 6px;
  text-align: left;
}
.feature {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
}
.feature-icon { font-size: 28px; line-height: 1; flex-shrink: 0; }
.feature-body h3 { font-size: 15px; margin-bottom: 4px; }
.feature-body p { font-size: 13px; color: var(--muted); line-height: 1.45; }
.feature-body b { color: var(--text); font-weight: 600; }

/* Quiz */
.quiz-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }

.btn-exit {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 20px;
  cursor: pointer;
  transition: .15s;
}
.btn-exit:hover { color: var(--bad); border-color: var(--bad); }

.badge-timer {
  color: #fcd34d;
  font-variant-numeric: tabular-nums;
}

.badge-countdown {
  color: #fcd34d;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}
.badge-countdown.low {
  color: #fff;
  background: var(--bad);
  animation: pulse .6s infinite alternate;
}
@keyframes pulse {
  from { transform: scale(1); }
  to { transform: scale(1.12); }
}

.best-record {
  text-align: center;
  font-size: 14px;
  color: #fcd34d;
  margin-top: -4px;
}
.best-record .new-record { color: var(--ok); font-weight: 700; }
.badge {
  font-size: 13px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 20px;
  background: var(--bg-2);
  color: var(--muted);
}
.badge-score { color: #a5b4fc; }

.progress-bar {
  height: 6px;
  background: var(--bg-2);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 24px;
}
#progress-fill {
  height: 100%;
  width: 20%;
  background: linear-gradient(90deg, #818cf8, #6366f1);
  transition: width .3s;
}

.options { display: flex; flex-direction: column; gap: 10px; }
.option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  text-align: left;
  color: var(--text);
  font-size: 15px;
  transition: .15s;
}
.option:hover:not(:disabled) { border-color: var(--primary); }
.option .key {
  width: 28px; height: 28px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  border-radius: 6px;
  background: var(--border);
  font-weight: 700;
  font-size: 13px;
}
.option.selected { border-color: var(--primary); background: #312e81; }
.option.correct { border-color: var(--ok); background: rgba(34,197,94,.15); }
.option.correct .key { background: var(--ok); }
.option.wrong { border-color: var(--bad); background: rgba(239,68,68,.15); }
.option.wrong .key { background: var(--bad); }
.option:disabled { cursor: default; }

.feedback { margin-top: 18px; font-weight: 600; font-size: 16px; min-height: 22px; }
.feedback.ok { color: var(--ok); }
.feedback.bad { color: var(--bad); }
.explanation {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.hidden { display: none !important; }

/* Sonuç */
.score-big {
  text-align: center;
  font-size: 44px;
  font-weight: 800;
  margin: 10px 0;
}
.score-big span { color: #a5b4fc; }

.result-stats {
  display: flex;
  gap: 14px;
  justify-content: center;
  margin: 20px 0;
}
.stat {
  flex: 1;
  text-align: center;
  background: var(--bg-2);
  border-radius: 12px;
  padding: 16px;
}
.stat span { font-size: 28px; font-weight: 800; display: block; }
.stat small { color: var(--muted); }
.stat-ok span { color: var(--ok); }
.stat-bad span { color: var(--bad); }

.result-message {
  text-align: center;
  font-size: 16px;
  margin: 16px 0;
  line-height: 1.6;
}

.review { margin-top: 10px; }
.review-item {
  background: var(--bg-2);
  border-left: 3px solid var(--bad);
  border-radius: 8px;
  padding: 14px;
  margin-bottom: 10px;
}
.review-item .rq { font-weight: 600; margin-bottom: 6px; }
.review-item .ra { font-size: 14px; color: var(--muted); }
.review-item .ra b { color: var(--ok); }
.review-item .rx { font-size: 13px; color: var(--muted); margin-top: 6px; line-height: 1.5; }

.spinner {
  width: 46px; height: 46px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  margin: 0 auto 20px;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Streak badge */
.badge-streak {
  color: #fb923c;
  font-weight: 700;
  background: rgba(251, 146, 60, 0.15);
  border: 1px solid rgba(251, 146, 60, 0.4);
}
@keyframes pop {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.25); }
  100% { transform: scale(1); }
}
.badge-streak.pop { animation: pop .4s ease; }

.badge-lives {
  font-weight: 700;
  letter-spacing: 1px;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.4);
}
.badge-lives.low {
  background: var(--bad);
  animation: pulse .6s infinite alternate;
}
.badge-lives.pop { animation: pop .4s ease; }

/* Bar chart */
.chart { margin: 18px 0 8px; display: flex; flex-direction: column; gap: 10px; }
.chart-row { display: flex; align-items: center; gap: 10px; }
.chart-label { width: 48px; font-size: 13px; color: var(--muted); flex-shrink: 0; }
.chart-bar-wrap {
  flex: 1;
  height: 18px;
  background: var(--bg-2);
  border-radius: 9px;
  overflow: hidden;
}
.chart-fill {
  height: 100%;
  border-radius: 9px;
  transition: width .6s ease;
}
.chart-ok  { background: var(--ok); }
.chart-bad { background: var(--bad); }
.chart-num { font-size: 13px; font-weight: 700; width: 36px; text-align: right; color: var(--muted); }

/* AI rapor */
.ai-report {
  margin: 18px 0;
  background: linear-gradient(135deg, #1e293b, #1a2540);
  border: 1px solid #334155;
  border-left: 3px solid #6366f1;
  border-radius: 10px;
  padding: 16px;
}
.ai-report-header {
  font-size: 13px;
  font-weight: 700;
  color: #a5b4fc;
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 10px;
}
.ai-report-content {
  font-size: 14px;
  color: var(--text);
  line-height: 1.7;
}
.spinner-small {
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}

/* AI Sağlayıcı seçici */
.ai-provider-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.ai-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px 8px 14px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--muted);
  border-radius: 12px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: .2s;
}
.ai-chip:hover {
  border-color: #475569;
  transform: translateY(-2px);
  color: var(--text);
}

.ai-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ai-logo-openai    { background: #10a37f; }
.ai-logo-anthropic { background: #d4622a; }
.ai-logo-gemini    { background: linear-gradient(135deg, #4285F4 0%, #34A853 50%, #EA4335 100%); }

.ai-chip[data-provider="openai"].selected {
  border-color: #10a37f;
  background: rgba(16,163,127,.12);
  color: #10a37f;
}
.ai-chip[data-provider="anthropic"].selected {
  border-color: #d4622a;
  background: rgba(212,98,42,.12);
  color: #d4622a;
}
.ai-chip[data-provider="gemini"].selected {
  border-color: #4285F4;
  background: rgba(66,133,244,.12);
  color: #4285F4;
}

/* Soru özeti başlık */
.section-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin: 18px 0 10px;
}

/* Soru geçmişi */
.review-ok {
  border-left-color: var(--ok);
}
.review-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px; height: 20px;
  border-radius: 50%;
  font-size: 12px;
  font-weight: 800;
  margin-right: 8px;
  flex-shrink: 0;
}
.review-ok .review-icon { background: rgba(34,197,94,.2); color: var(--ok); }
.review-bad .review-icon { background: rgba(239,68,68,.2); color: var(--bad); }
.wrong-ans { color: var(--bad); }

@media (max-width: 480px) {
  .card { padding: 22px; }
  .topic-grid,
  .topic-grid.grid-4 { grid-template-columns: repeat(2, 1fr); }
  h1 { font-size: 28px; }
}