:root {
  --bg: #f4f7fb;
  --card: #ffffff;
  --card-border: #e2e8f0;
  --text: #1f2937;
  --muted: #64748b;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: #eaf1ff;
  --answered: #059669;
  --answered-soft: #e6f7f0;
  --new: #d97706;
  --new-soft: #fef3e0;
  --danger: #dc2626;
  --danger-soft: #fdeaea;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10141c;
    --card: #1a2130;
    --card-border: #2c3648;
    --text: #eef2f8;
    --muted: #9aa7bd;
    --accent: #4c8dff;
    --accent-hover: #6ba0ff;
    --accent-soft: #1c2a45;
    --answered: #34d399;
    --answered-soft: #123528;
    --new: #fbbf24;
    --new-soft: #3a2c10;
    --danger: #f87171;
    --danger-soft: #3a1a1a;
  }
}

* { box-sizing: border-box; }

.hidden { display: none !important; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  border-radius: 10px;
}

input, textarea {
  font-family: inherit;
  font-size: 16px; /* avoid iOS zoom-on-focus */
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 12px 14px;
  width: 100%;
}

input:focus, textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

label {
  display: block;
  margin: 16px 0 6px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.muted { color: var(--muted); }

.error {
  color: var(--danger);
  font-weight: 600;
  margin: 10px 0 0;
}

.primary-btn {
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 14px 22px;
  min-height: 50px;
  width: 100%;
}
.primary-btn:hover { background: var(--accent-hover); }
.primary-btn:disabled { opacity: 0.6; cursor: default; }

.link-btn {
  background: none;
  color: var(--accent);
  font-weight: 600;
  padding: 8px 4px;
}

.danger-btn {
  background: var(--danger-soft);
  color: var(--danger);
  font-weight: 700;
  padding: 10px 16px;
  min-height: 40px;
}

/* ---------- Page shell ---------- */

.page {
  max-width: 640px;
  margin: 0 auto;
  padding: 28px 18px 60px;
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.section-title {
  font-size: 1.2rem;
  margin: 32px 0 14px;
}

.qa-question {
  font-weight: 700;
  margin: 0 0 4px;
}

.qa-meta {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0 0 12px;
}

.empty-state {
  color: var(--muted);
  text-align: center;
  padding: 20px 0;
}

.pin-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.pin-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  max-width: 340px;
  width: 100%;
  text-align: center;
}

.pin-card h1 { margin: 0 0 6px; font-size: 1.4rem; }

#pin-input {
  text-align: center;
  letter-spacing: 6px;
  font-size: 1.4rem;
  margin: 16px 0 12px;
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.admin-header h1 { font-size: 1.5rem; margin: 0; }

.status-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 3px 9px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.status-badge.new {
  background: var(--new-soft);
  color: var(--new);
}

.status-badge.answered {
  background: var(--answered-soft);
  color: var(--answered);
}

.q-item textarea {
  margin-top: 10px;
  min-height: 220px;
  resize: vertical;
}

.q-item-actions {
  display: flex;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.q-item-actions .primary-btn {
  width: auto;
  flex: 1;
  min-width: 120px;
}

.save-status {
  font-size: 0.85rem;
  color: var(--answered);
  margin-left: 4px;
}