:root {
  --parchment: #f4ecd8;
  --parchment-2: #ece1c4;
  --ink: #2b231a;
  --ink-soft: #5b4d3a;
  --accent: #8b5e34;
  --accent-2: #a8784a;
  --success: #4c7a3f;
  --success-soft: #d9e7cf;
  --danger: #a64134;
  --danger-soft: #f1d5cf;
  --shadow: 0 10px 30px rgba(60, 40, 20, 0.12);
  --radius: 18px;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 10% -10%, #fff8e8 0%, transparent 60%),
    radial-gradient(1000px 600px at 110% 10%, #fff3da 0%, transparent 55%),
    var(--parchment);
  color: var(--ink);
  font-family: 'Hanken Grotesk', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, .brand { font-family: 'Fraunces', Georgia, serif; letter-spacing: -0.01em; }

#root {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 18px calc(64px + env(safe-area-inset-bottom));
  padding-left: max(18px, env(safe-area-inset-left));
  padding-right: max(18px, env(safe-area-inset-right));
}
.screen { display: block; }
.screen[hidden], [hidden] { display: none !important; }

/* Mobil: iOS Safari'nin input zoom'unu önle (font ≥ 16px), tüm öğeler kapsayıcıdan geniş olmasın */
img, video, iframe { max-width: 100%; height: auto; }
input, select, textarea, button { font-size: 16px; max-width: 100%; }
button { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }

/* ---------------- AUTH ---------------- */
#auth-screen { min-height: 100vh; min-height: 100dvh; display: grid; place-items: center; padding: 16px; }
.auth-card {
  width: 100%;
  max-width: 420px;
  background: rgba(255,255,255,0.55);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(139, 94, 52, 0.18);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
}
.brand { margin: 0; font-weight: 700; font-size: 34px; }
.brand-sub { color: var(--accent); font-style: italic; font-weight: 500; }
.brand.small { font-size: 22px; margin: 0; }
.subtitle { margin: 6px 0 18px; color: var(--ink-soft); }

.tabs { display: flex; gap: 8px; margin: 14px 0 18px; }
.tab {
  flex: 1; padding: 10px 12px; border-radius: 10px;
  background: transparent; border: 1px solid rgba(139,94,52,0.25);
  color: var(--ink-soft); font: inherit; cursor: pointer;
}
.tab.active { background: var(--ink); color: var(--parchment); border-color: var(--ink); }

form label { display: block; margin-bottom: 12px; }
form label span { display: block; font-size: 13px; color: var(--ink-soft); margin-bottom: 4px; }
input[type="text"], input[type="password"] {
  width: 100%; padding: 11px 13px;
  border-radius: 10px; border: 1px solid rgba(139,94,52,0.35);
  background: #fffaf0; color: var(--ink); font: inherit; outline: none;
}
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(139,94,52,0.15); }

button { font: inherit; cursor: pointer; }
button.primary {
  width: 100%; padding: 12px 14px; border: none;
  border-radius: 10px; background: var(--ink); color: var(--parchment);
  font-weight: 600;
}
button.primary:hover { background: #3a2f23; }
button.ghost {
  background: transparent; border: 1px solid rgba(139,94,52,0.3);
  color: var(--ink); padding: 8px 12px; border-radius: 10px;
}
button.ghost.small { padding: 6px 10px; font-size: 13px; }
button.success { background: var(--success); color: #fff; border: none; padding: 10px 14px; border-radius: 10px; }
button.danger { background: var(--danger); color: #fff; border: none; padding: 10px 14px; border-radius: 10px; }

.error {
  background: var(--danger-soft); color: var(--danger);
  padding: 9px 12px; border-radius: 8px; margin-bottom: 12px; font-size: 14px;
}

/* ---------------- APP ---------------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 6px 0 14px; flex-wrap: wrap;
}
.topbar-left { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.hello { color: var(--ink-soft); font-size: 14px; }

.level-switch { display: inline-flex; background: rgba(255,255,255,0.5); border: 1px solid rgba(139,94,52,0.18); border-radius: 10px; padding: 3px; }
.level-btn {
  background: transparent; border: none; padding: 7px 12px;
  border-radius: 8px; color: var(--ink-soft); font-weight: 600;
}
.level-btn.active { background: var(--accent); color: #fff; }

.mode-switch {
  display: flex; gap: 8px; margin: 6px 0 12px;
  overflow-x: auto; flex-wrap: nowrap;
  scrollbar-width: none; -ms-overflow-style: none;
}
.mode-switch::-webkit-scrollbar { display: none; }
.mode-btn {
  background: rgba(255,255,255,0.5); border: 1px solid rgba(139,94,52,0.18);
  padding: 8px 14px; border-radius: 999px; color: var(--ink-soft); font-weight: 600;
  white-space: nowrap; flex: 0 0 auto;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.mode-btn:hover { transform: scale(1.02); box-shadow: 0 4px 12px rgba(60,40,20,0.08); }
.mode-btn.active { background: var(--ink); color: var(--parchment); border-color: var(--ink); }

/* Daily progress bar */
.daily-bar {
  display: flex; align-items: center; gap: 12px;
  margin: 6px 0 12px; padding: 10px 14px;
  background: rgba(255,255,255,0.55); border: 1px solid rgba(139,94,52,0.18);
  border-radius: 12px;
}
.daily-progress { flex: 1; display: flex; align-items: center; gap: 10px; }
.daily-label { font-size: 13px; color: var(--ink-soft); font-weight: 600; }
.daily-track { flex: 1; height: 8px; background: rgba(139,94,52,0.15); border-radius: 999px; overflow: hidden; }
#daily-fill {
  height: 100%; width: 0;
  background: linear-gradient(90deg, #d4a35a, #a8784a);
  transition: width 0.5s ease;
}
.daily-count { font-size: 13px; color: var(--ink-soft); font-variant-numeric: tabular-nums; min-width: 50px; text-align: right; }
.streak-pill {
  display: inline-flex; align-items: center; gap: 4px;
  background: rgba(255,140,40,0.12); color: #b5500e;
  padding: 6px 11px; border-radius: 999px; font-weight: 700; font-size: 14px;
}
.streak-flame { font-size: 16px; }

.filters { margin-bottom: 10px; }
.chips {
  display: flex; flex-wrap: nowrap; gap: 6px; margin-bottom: 8px;
  overflow-x: auto; padding-bottom: 4px;
  scrollbar-width: none; -ms-overflow-style: none;
  -webkit-overflow-scrolling: touch;
}
.chips::-webkit-scrollbar { display: none; }
.chip {
  background: rgba(255,255,255,0.6); border: 1px solid rgba(139,94,52,0.22);
  padding: 6px 11px; border-radius: 999px; font-size: 13px; color: var(--ink-soft);
  white-space: nowrap; flex: 0 0 auto;
  cursor: pointer;
}
.chip.active { background: var(--accent-2); color: #fff; border-color: var(--accent-2); }

.toolbar { display: flex; align-items: center; gap: 14px; justify-content: space-between; flex-wrap: wrap; }
.check { display: inline-flex; align-items: center; gap: 8px; color: var(--ink-soft); font-size: 14px; }
.check input { accent-color: var(--accent); width: 16px; height: 16px; }

.progress-wrap { display: flex; align-items: center; gap: 12px; margin: 10px 0 16px; }
.progress { flex: 1; height: 12px; background: rgba(139,94,52,0.12); border-radius: 999px; overflow: hidden; }
#progress-bar {
  height: 100%; width: 0;
  background: linear-gradient(90deg, #d4a35a 0%, #a8784a 50%, #7a3b3b 100%);
  transition: width 0.6s cubic-bezier(0.4, 0.2, 0.2, 1);
  box-shadow: inset 0 1px 2px rgba(255,255,255,0.3);
}
.progress-text { font-size: 13px; color: var(--ink-soft); min-width: 60px; text-align: right; font-variant-numeric: tabular-nums; }

/* ---------------- ARTIKEL RENKLERI ---------------- */
.art { font-weight: 700; }
.art-der { color: #4a7ab5; }
.art-die { color: #b5504a; }
.art-das { color: #4a8c55; }

/* ---------------- CARD ---------------- */
.card-area {
  perspective: 1200px;
  touch-action: pan-y;
}
.card {
  position: relative;
  width: 100%;
  min-height: 260px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transform-style: preserve-3d;
  transition: transform 0.45s ease;
  cursor: pointer;
  outline: none;
  user-select: none;
}
.card.flipped { transform: rotateY(180deg); }
.card.swipe-left  { transform: translateX(-120%) rotate(-8deg); opacity: 0; transition: transform 0.3s, opacity 0.3s; }
.card.swipe-right { transform: translateX(120%) rotate(8deg); opacity: 0; transition: transform 0.3s, opacity 0.3s; }

.card-face {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  padding: 28px 22px;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: var(--radius);
}
.card-face.front { background: linear-gradient(160deg, #fffaf0 0%, #f3e6c8 100%); }
.card-face.back  { background: linear-gradient(160deg, #f0ebe0 0%, #e7dcc4 100%); transform: rotateY(180deg); }
.card-group { position: absolute; top: 12px; left: 16px; font-size: 12px; color: var(--ink-soft); text-transform: uppercase; letter-spacing: 0.08em; }
.card-word { font-family: 'Fraunces', Georgia, serif; font-size: clamp(28px, 6vw, 44px); font-weight: 600; text-align: center; }
.card-hint { position: absolute; bottom: 14px; font-size: 12px; color: var(--ink-soft); }
.card-tr { font-family: 'Fraunces', Georgia, serif; font-size: clamp(22px, 5vw, 34px); font-weight: 600; text-align: center; color: var(--accent); }
.card-ex { margin-top: 14px; color: var(--ink-soft); text-align: center; max-width: 92%; font-size: 16px; line-height: 1.45; }
.card-ex-tr { margin-top: 8px; font-style: italic; color: rgba(91, 77, 58, 0.65); text-align: center; max-width: 92%; font-size: 14px; }

.card-controls {
  display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 8px;
  margin-top: 16px;
}
.card-controls button { padding: 11px 8px; transition: transform 0.15s ease, box-shadow 0.15s ease; }
.card-controls button:hover { transform: scale(1.02); box-shadow: 0 6px 16px rgba(60,40,20,0.12); }
.card-meta { text-align: center; margin-top: 10px; color: var(--ink-soft); font-size: 13px; }

/* ---------------- ARTIKEL QUIZ ---------------- */
.art-question {
  background: linear-gradient(160deg, #fffaf0 0%, #f3e6c8 100%);
  border-radius: var(--radius);
  padding: 40px 20px;
  font-family: 'Fraunces', Georgia, serif; font-size: clamp(30px, 7vw, 48px); font-weight: 600;
  text-align: center;
  box-shadow: var(--shadow);
  margin-bottom: 18px;
}
.art-options { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; }
.art-opt {
  padding: 18px 8px; border-radius: 14px; font: inherit; font-weight: 700; font-size: 18px;
  border: 2px solid; cursor: pointer; color: #fff;
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.2s;
}
.art-opt:hover { transform: scale(1.03); box-shadow: 0 8px 18px rgba(60,40,20,0.15); }
.art-opt:disabled { cursor: default; opacity: 0.85; }
.art-btn-der { background: #4a7ab5; border-color: #4a7ab5; }
.art-btn-die { background: #b5504a; border-color: #b5504a; }
.art-btn-das { background: #4a8c55; border-color: #4a8c55; }
.art-opt.correct { box-shadow: 0 0 0 4px rgba(74,140,85,0.4); }
.art-opt.wrong   { background: #999 !important; border-color: #999 !important; box-shadow: 0 0 0 4px rgba(180,80,74,0.4); }

/* ---------------- STATS ---------------- */
.stats-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; margin-bottom: 16px; }
.stat-card {
  background: rgba(255,255,255,0.55);
  border: 1px solid rgba(139,94,52,0.18);
  border-radius: 14px; padding: 16px;
  text-align: center;
}
.stat-label { font-size: 12px; color: var(--ink-soft); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 6px; }
.stat-value { font-family: 'Fraunces', Georgia, serif; font-size: clamp(24px, 5vw, 36px); font-weight: 700; color: var(--ink); }
.stat-sub { font-size: 12px; color: var(--ink-soft); margin-top: 2px; }
.stats-h { font-family: 'Fraunces', Georgia, serif; font-size: 18px; margin: 18px 0 8px; }
.stat-levels, .stat-cats { display: flex; flex-direction: column; gap: 8px; }
.stat-row { display: flex; flex-direction: column; gap: 4px; }
.stat-row-head { display: flex; justify-content: space-between; font-size: 13px; color: var(--ink-soft); }
.stat-row-bar { height: 10px; background: rgba(139,94,52,0.12); border-radius: 999px; overflow: hidden; }
.stat-row-fill { height: 100%; background: linear-gradient(90deg, #d4a35a, #a8784a); transition: width 0.5s ease; }
.stats-foot { margin-top: 18px; padding: 12px 14px; background: rgba(255,255,255,0.45); border-radius: 12px; }

@media (max-width: 520px) {
  .stats-grid { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  #root { padding: 14px 12px calc(48px + env(safe-area-inset-bottom)); }
  .topbar { gap: 8px; padding-bottom: 8px; }
  .topbar-left { gap: 10px; }
  .level-switch { padding: 2px; }
  .level-btn { padding: 6px 9px; font-size: 14px; }
  .mode-btn { padding: 7px 12px; font-size: 14px; }
  .auth-card { padding: 22px 18px; }
  .card { min-height: 220px; }
  .card-controls { grid-template-columns: 1fr 1fr; }
  .card-controls button { padding: 13px 8px; font-size: 15px; }
  .progress-wrap { gap: 10px; }
}

/* ---------------- QUIZ ---------------- */
.quiz-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; margin: 4px 0 14px; }
.quiz-dir-switch { display: inline-flex; gap: 6px; }
.qdir-btn { background: rgba(255,255,255,0.5); border: 1px solid rgba(139,94,52,0.18); padding: 7px 12px; border-radius: 8px; color: var(--ink-soft); font-weight: 600; }
.qdir-btn.active { background: var(--ink); color: var(--parchment); border-color: var(--ink); }
.quiz-stats { display: flex; gap: 16px; color: var(--ink-soft); font-size: 14px; }

.quiz-question {
  background: linear-gradient(160deg, #fffaf0 0%, #f3e6c8 100%);
  border-radius: var(--radius);
  padding: 30px 20px;
  font-family: 'Fraunces', Georgia, serif; font-size: clamp(24px, 5vw, 34px); font-weight: 600;
  text-align: center;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}
.quiz-options { display: grid; gap: 10px; grid-template-columns: 1fr 1fr; }
.quiz-opt {
  background: rgba(255,255,255,0.65);
  border: 1px solid rgba(139,94,52,0.22);
  padding: 14px 12px; border-radius: 12px;
  font: inherit; font-size: 16px; cursor: pointer; text-align: center; color: var(--ink);
}
.quiz-opt:hover { background: rgba(255,255,255,0.85); }
.quiz-opt.correct { background: var(--success-soft); border-color: var(--success); }
.quiz-opt.wrong   { background: var(--danger-soft); border-color: var(--danger); }
.quiz-opt:disabled { cursor: default; }
.quiz-feedback { margin: 12px 0; min-height: 22px; text-align: center; color: var(--ink-soft); }
#quiz-next { max-width: 280px; margin: 0 auto; display: block; }

@media (max-width: 520px) {
  .quiz-options { grid-template-columns: 1fr; }
}

/* ---------------- TOAST ---------------- */
.toast {
  position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%);
  background: var(--ink); color: var(--parchment);
  padding: 9px 16px; border-radius: 999px; font-size: 14px;
  box-shadow: var(--shadow); z-index: 50;
}