/* ── Reset & base ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0f1117;
  --surface:   #1a1d27;
  --border:    #2a2e3f;
  --accent:    #6c63ff;
  --accent-h:  #8b85ff;
  --correct:   #22c55e;
  --wrong:     #ef4444;
  --text:      #e8eaf0;
  --muted:     #8891a8;
  --radius:    12px;
  --shadow:    0 4px 24px rgba(0,0,0,.4);
}

html, body { height: 100%; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.app {
  width: 100%;
  max-width: 680px;
  padding: 1.5rem 1rem 3rem;
}

/* ── Screens ───────────────────────────────────────────────────────────────── */
.screen { display: none; }
.screen.active { display: block; }

/* ── Cards ─────────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow);
}

/* ── Intro / Home ──────────────────────────────────────────────────────────── */
.intro-card { text-align: center; }
.logo { font-size: 3.5rem; margin-bottom: .5rem; }

h1 { font-size: 2.4rem; font-weight: 800; letter-spacing: -1px; margin-bottom: .4rem; }

.subtitle { font-size: 1.05rem; color: var(--muted); margin-bottom: .3rem; }
.hint     { font-size: .85rem;  color: var(--muted); margin-bottom: 1.8rem; }

/* city list */
.city-list {
  display: flex;
  flex-direction: column;
  gap: .8rem;
  margin-top: .5rem;
}

.city-btn {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  text-align: left;
  color: var(--text);
  width: 100%;
}
.city-btn:hover { border-color: var(--accent); background: #14162090; }

.city-flag { font-size: 2rem; }
.city-info { flex: 1; }
.city-info strong { display: block; font-size: 1.05rem; font-weight: 700; }
.city-info small  { color: var(--muted); font-size: .8rem; }
.city-arrow { color: var(--accent); font-size: 1.2rem; }

/* ── Challenge banner ──────────────────────────────────────────────────────── */
.challenge-banner {
  background: #2a2330;
  border: 1px solid #5b4a7a;
  border-radius: 8px;
  padding: .6rem 1rem;
  font-size: .85rem;
  color: #c4b5fd;
  margin-bottom: 1.2rem;
}
.hidden { display: none !important; }

/* ── Quiz header ───────────────────────────────────────────────────────────── */
.quiz-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}
.progress-wrap { flex: 1; }
.progress-wrap span { font-size: .8rem; color: var(--muted); }
.progress-bar  { height: 4px; background: var(--border); border-radius: 2px; margin-top: 4px; }
.progress-fill { height: 100%; background: var(--accent); border-radius: 2px; transition: width .35s; }
.score-label {
  font-size: 1.1rem; font-weight: 700;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .25rem .75rem;
  min-width: 48px;
  text-align: center;
}

/* ── Image ─────────────────────────────────────────────────────────────────── */
.image-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  margin-bottom: 1.2rem;
}
.image-loading {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--muted); font-size: .9rem;
}
.street-image {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}

/* ── Question & options ────────────────────────────────────────────────────── */
.question-prompt { font-size: .9rem; color: var(--muted); margin-bottom: .9rem; }

.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .65rem;
  margin-bottom: 1rem;
}

.option-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .75rem .9rem;
  font-size: .9rem;
  color: var(--text);
  cursor: pointer;
  transition: border-color .12s, background .12s;
  text-align: left;
  line-height: 1.35;
}
.option-btn:hover:not(:disabled) { border-color: var(--accent); background: #1e2135; }
.option-btn:disabled { cursor: default; }
.option-btn.correct { border-color: var(--correct); background: #14281f; color: var(--correct); }
.option-btn.wrong   { border-color: var(--wrong);   background: #2a1515; color: var(--wrong);   }

/* ── Feedback ──────────────────────────────────────────────────────────────── */
.feedback {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .6rem .9rem;
  border-radius: 8px;
  font-size: .9rem;
  margin-bottom: .9rem;
}
.feedback.correct-fb { background: #14281f; border: 1px solid var(--correct); color: var(--correct); }
.feedback.wrong-fb   { background: #2a1515; border: 1px solid var(--wrong);   color: #f87171; }

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: .4rem;
  padding: .7rem 1.4rem;
  border-radius: 8px;
  border: none;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: filter .15s, opacity .15s;
}
.btn:active { filter: brightness(.9); }

.btn-primary { background: var(--accent); color: #fff; width: 100%; margin-top: .2rem; }
.btn-primary:hover { background: var(--accent-h); }

.btn-secondary { background: var(--surface); border: 1px solid var(--border); color: var(--text); }
.btn-ghost     { background: transparent; color: var(--muted); }
.btn-ghost:hover { color: var(--text); }

/* ── Results ───────────────────────────────────────────────────────────────── */
.results-card { text-align: center; }

.results-emoji { font-size: 3.5rem; margin-bottom: .5rem; }
.results-card h2 { font-size: 1.6rem; font-weight: 800; margin-bottom: .3rem; }
.final-score { font-size: 3.5rem; font-weight: 900; color: var(--accent); margin: .5rem 0; }
.results-message { color: var(--muted); font-size: .9rem; margin-bottom: 1.2rem; }

.emoji-grid {
  display: flex;
  justify-content: center;
  gap: .3rem;
  font-size: 1.5rem;
  margin-bottom: 1.4rem;
  flex-wrap: wrap;
}

/* ── Share box ─────────────────────────────────────────────────────────────── */
.share-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  margin-bottom: 1.2rem;
}
.share-label {
  font-size: .8rem;
  color: var(--muted);
  margin-bottom: .65rem;
}
.share-btns {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 8px;
}
.share-btns-secondary { margin-top: 4px; }

/* Social platform buttons */
.btn-social {
  padding: .45rem .9rem;
  border-radius: 8px;
  font-size: .85rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  color: #fff;
}
.btn-x       { background: #000; }
.btn-x:hover { background: #222; }
.btn-fb       { background: #1877f2; }
.btn-fb:hover { background: #1a6ed8; }
.btn-wa       { background: #25d366; color: #fff; }
.btn-wa:hover { background: #1ebc5a; }
.btn-threads       { background: #101010; }
.btn-threads:hover { background: #2a2a2a; }

.btn-copy {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: .45rem .9rem;
  font-size: .82rem;
  cursor: pointer;
}
.btn-copy:hover { border-color: var(--accent); }

.btn-native {
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  padding: .45rem .9rem;
  font-size: .85rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
}

.copy-confirm {
  color: var(--correct);
  font-size: .8rem;
  margin-top: .5rem;
  min-height: 1.2em;
}

.results-actions {
  display: flex;
  gap: .7rem;
  justify-content: center;
  margin-top: .2rem;
}

/* ── Review ────────────────────────────────────────────────────────────────── */
.review-details { margin-top: 1.5rem; text-align: left; }
.review-details summary { cursor: pointer; color: var(--muted); font-size: .85rem; }
.review-list { list-style: none; margin-top: .8rem; display: flex; flex-direction: column; gap: .5rem; }
.review-item {
  display: flex; align-items: baseline; gap: .5rem;
  font-size: .85rem; padding: .4rem .6rem;
  border-radius: 6px;
}
.review-item.r-correct { background: #14281f; color: var(--correct); }
.review-item.r-wrong   { background: #2a1515; color: #f87171; }
.review-item .r-icon   { font-size: .9rem; }
.review-item .r-ans    { flex: 1; }
.review-item .r-you    { color: var(--muted); font-size: .78rem; }

/* ── Language toggle ─────────────────────────────────────────────────────── */
.btn-lang {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 6px;
  padding: .25rem .6rem;
  font-size: .78rem;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: .05em;
  transition: border-color .15s, color .15s;
}
.btn-lang:hover { border-color: var(--accent); color: var(--text); }

.intro-card { position: relative; }

/* ── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .options-grid { grid-template-columns: 1fr; }
  .app { padding: 1rem .75rem 2rem; }
  h1 { font-size: 2rem; }
}