:root {
  --bg: #0f172a;
  --bg2: #1e293b;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --success: #16a34a;
  --success-bg: #dcfce7;
  --danger: #dc2626;
  --danger-bg: #fee2e2;
  --warn: #d97706;
  --warn-bg: #fef3c7;
  --highlight: #f1f5f9;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: #f8fafc;
  color: var(--text);
  min-height: 100vh;
  display: flex; flex-direction: column;
  line-height: 1.5;
}
.container { max-width: 1100px; margin: 0 auto; padding: 0 16px; width: 100%; }
.topbar { background: var(--bg); color: white; padding: 12px 0; position: sticky; top: 0; z-index: 10; box-shadow: 0 2px 8px rgba(0,0,0,.1); }
.topbar .container { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.logo { color: white; text-decoration: none; font-weight: 700; font-size: 1.1rem; }
.topbar nav { display: flex; gap: 8px; flex-wrap: wrap; }
.topbar nav a {
  color: #cbd5e1; text-decoration: none; padding: 6px 12px;
  border-radius: 6px; font-size: 0.95rem; transition: all 0.15s;
}
.topbar nav a:hover { background: var(--bg2); color: white; }
.topbar nav a.active { background: var(--accent); color: white; }
main { flex: 1; padding: 24px 0; }
footer { padding: 16px 0; background: var(--bg); color: #94a3b8; font-size: 0.85rem; }
.muted { color: var(--muted); }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 10px; padding: 16px; margin-bottom: 12px;
  box-shadow: 0 1px 2px rgba(0,0,0,.04);
}
h1 { margin: 0 0 16px; font-size: 1.6rem; }
h2 { margin: 16px 0 8px; font-size: 1.3rem; }
h3 { margin: 12px 0 8px; font-size: 1.05rem; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.col { flex: 1; min-width: 200px; }
.grid { display: grid; gap: 12px; }
.grid-stats { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); }
.grid-tests { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.stat { background: white; border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.stat .num { font-size: 1.8rem; font-weight: 700; color: var(--accent); }
.stat .label { color: var(--muted); font-size: 0.9rem; }
.btn {
  display: inline-block; background: var(--accent); color: white;
  border: none; padding: 8px 14px; border-radius: 6px;
  font-size: 0.95rem; cursor: pointer; text-decoration: none;
  transition: background 0.15s;
}
.btn:hover { background: var(--accent-hover); }
.btn.secondary { background: #475569; }
.btn.secondary:hover { background: #334155; }
.btn.ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn.ghost:hover { background: var(--highlight); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
input[type=text], input[type=search], input[type=number], select {
  font: inherit; padding: 8px 10px; border: 1px solid var(--border);
  border-radius: 6px; background: white; width: 100%;
  transition: border-color 0.15s;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }
label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 4px; }
.filters { display: grid; grid-template-columns: 2fr repeat(4, 1fr); gap: 10px; margin-bottom: 16px; align-items: end; }
@media (max-width: 700px) { .filters { grid-template-columns: 1fr 1fr; } }
.q-card { border-left: 4px solid var(--accent); }
.q-text { font-weight: 500; white-space: pre-wrap; margin: 4px 0 12px; }
.q-meta { font-size: 0.82rem; color: var(--muted); margin-bottom: 6px; }
.q-meta .pill { display: inline-block; background: var(--highlight); padding: 2px 8px; border-radius: 999px; margin-right: 6px; font-size: 0.78rem; }
.answers { list-style: none; padding: 0; margin: 0; }
.answers li {
  padding: 8px 12px; margin-bottom: 6px; border-radius: 6px;
  border: 1px solid var(--border); display: flex; gap: 8px; align-items: flex-start;
  white-space: pre-wrap; cursor: pointer; transition: all 0.15s;
}
.answers li .letter { font-weight: 700; min-width: 24px; }
.answers li.correct { background: var(--success-bg); border-color: var(--success); }
.answers li.correct .letter { color: var(--success); }
.answers li.wrong { background: var(--danger-bg); border-color: var(--danger); }
.answers li.wrong .letter { color: var(--danger); }
.answers li.selected { box-shadow: 0 0 0 2px var(--accent); }
.answers li.reveal-correct { background: var(--success-bg); border-color: var(--success); }
.explain { margin-top: 12px; padding: 10px 12px; background: var(--warn-bg); border-left: 3px solid var(--warn); border-radius: 4px; font-size: 0.9rem; white-space: pre-wrap; }
.explain b { display: block; margin-bottom: 4px; color: var(--warn); }
.pagination { display: flex; gap: 6px; justify-content: center; padding: 16px 0; align-items: center; flex-wrap: wrap; }
.pagination button { background: white; border: 1px solid var(--border); padding: 6px 10px; border-radius: 6px; cursor: pointer; }
.pagination button.active { background: var(--accent); color: white; border-color: var(--accent); }
.pagination button:hover:not(:disabled):not(.active) { background: var(--highlight); }
.test-card { cursor: pointer; transition: all 0.15s; text-decoration: none; color: var(--text); display: block; }
.test-card .title { color: var(--accent); }
.test-card:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,0.08); }
.test-card .title { font-weight: 600; }
.test-card .meta { color: var(--muted); font-size: 0.85rem; margin-top: 4px; }
.spinner { text-align: center; padding: 40px; color: var(--muted); }
.quiz-progress { background: var(--highlight); border-radius: 999px; height: 8px; margin: 12px 0; overflow: hidden; }
.quiz-progress > div { height: 100%; background: var(--accent); transition: width 0.3s; }
.quiz-controls { display: flex; gap: 10px; margin: 16px 0; flex-wrap: wrap; }
.quiz-summary { text-align: center; padding: 20px; }
.quiz-summary .big { font-size: 3rem; font-weight: 700; color: var(--accent); }
.tag {
  display: inline-block; font-size: 0.75rem; padding: 2px 8px;
  border-radius: 999px; margin-right: 4px;
}
.tag.egzamin { background: #dbeafe; color: #1e40af; }
.tag.trening { background: #dcfce7; color: #166534; }
.tag.bonus { background: #fef3c7; color: #92400e; }
.section-bar { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
hr.sep { border: none; border-top: 1px solid var(--border); margin: 16px 0; }
.checkbox-row { display: flex; gap: 8px; align-items: center; padding: 6px 0; }
.checkbox-row input { width: auto; }
.badge { display: inline-block; background: #ef4444; color: white; font-size: 0.72rem; padding: 1px 7px; border-radius: 999px; margin-left: 4px; min-width: 20px; text-align: center; }
/* bez tego `display:inline-block` przebija atrybut hidden i zostaje pusta czerwona kropka */
.badge[hidden] { display: none; }
.variants-badge { display: inline-block; background: #1e40af; color: white; font-size: 0.72rem; padding: 1px 6px; border-radius: 999px; margin-left: 6px; font-weight: 600; }
.search-bar { display: flex; gap: 6px; align-items: stretch; }
.search-bar input { flex: 1; }
.toolbar { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin: 8px 0 12px; padding: 8px 12px; background: var(--highlight); border-radius: 8px; }
.toolbar label { margin: 0; display: flex; align-items: center; gap: 6px; color: var(--text); }
.timer-bar { position: sticky; top: 56px; z-index: 5; background: white; border: 1px solid var(--border); border-radius: 10px; padding: 12px 16px; margin-bottom: 16px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.timer-clock { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.timer-clock.warning { color: var(--warn); }
.timer-clock.danger { color: var(--danger); }
.exam-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(36px, 1fr)); gap: 4px; margin: 12px 0; }
.exam-grid button { background: white; border: 1px solid var(--border); border-radius: 4px; padding: 6px 0; cursor: pointer; font-size: 0.82rem; font-variant-numeric: tabular-nums; }
.exam-grid button.answered { background: var(--accent); color: white; border-color: var(--accent); }
.exam-grid button.current { box-shadow: 0 0 0 2px var(--warn); }
.exam-grid button.review { background: var(--warn-bg); border-color: var(--warn); }
.exam-grid button.right { background: var(--success-bg); border-color: var(--success); }
.exam-grid button.wrong { background: var(--danger-bg); border-color: var(--danger); }

/* ---------- pola formularzy: dorzucone typy (logowanie/rejestracja) ---------- */
input[type=email], input[type=password] {
  font: inherit; padding: 8px 10px; border: 1px solid var(--border);
  border-radius: 6px; background: white; width: 100%;
  transition: border-color 0.15s;
}

/* ---------- ekrany logowania / rejestracji ---------- */
.auth-body { background: linear-gradient(160deg, #0f172a 0%, #1e293b 55%, #334155 100%); }
.auth-wrap { flex: 1; display: flex; align-items: center; justify-content: center; padding: 32px 16px; }
.auth-card {
  background: white; border-radius: 14px; padding: 28px;
  width: 100%; max-width: 420px; box-shadow: 0 18px 45px rgba(0,0,0,.35);
}
.auth-logo { font-size: 1.35rem; font-weight: 700; margin-bottom: 6px; }
.auth-msg { margin-top: 14px; padding: 10px 12px; border-radius: 8px; font-size: 0.9rem; }
.auth-msg.error { background: var(--danger-bg); color: #991b1b; border: 1px solid #fecaca; }
.auth-msg.ok { background: var(--success-bg); color: #166534; border: 1px solid #bbf7d0; }
.auth-foot { font-size: 0.88rem; margin: 18px 0 0; text-align: center; line-height: 1.6; }

/* ---------- menu hamburgerowe (mobile) ---------- */
.nav-toggle {
  display: none; background: transparent; border: 1px solid #334155;
  border-radius: 8px; padding: 8px 10px; cursor: pointer;
  flex-direction: column; gap: 4px; align-items: center; justify-content: center;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: #e2e8f0; border-radius: 2px; transition: transform .2s, opacity .2s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 860px) {
  .topbar .container { flex-wrap: wrap; }
  .nav-toggle { display: flex; }
  .topbar nav {
    display: none; flex-basis: 100%; flex-direction: column;
    gap: 2px; padding-top: 10px; margin-top: 8px; border-top: 1px solid #334155;
  }
  .topbar nav.open { display: flex; }
  .topbar nav a { padding: 11px 12px; font-size: 1rem; }
  h1 { font-size: 1.35rem; }
  .timer-bar { top: 62px; }
  .quiz-controls .btn, .quiz-controls button { flex: 1; min-width: 130px; text-align: center; }
}

/* ---------- profil ---------- */
.user-chip { display: flex; align-items: center; gap: 8px; color: #cbd5e1; font-size: 0.9rem; }
.user-chip .avatar {
  width: 30px; height: 30px; border-radius: 50%; background: var(--accent);
  color: white; display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.85rem;
}
.attempt-row { display: flex; justify-content: space-between; gap: 12px; padding: 9px 0; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.attempt-row:last-child { border-bottom: none; }
.score-pill { font-weight: 700; font-variant-numeric: tabular-nums; }
.score-pill.good { color: var(--success); }
.score-pill.bad { color: var(--danger); }
.user-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.user-table th { text-align: left; color: var(--muted); font-weight: 600; padding: 8px 6px; border-bottom: 1px solid var(--border); font-size: 0.82rem; }
.user-table td { padding: 8px 6px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.user-table tr:last-child td { border-bottom: none; }
.status-tag { display: inline-block; font-size: 0.74rem; padding: 2px 8px; border-radius: 999px; }
.status-tag.active { background: var(--success-bg); color: #166534; }
.status-tag.pending { background: var(--warn-bg); color: #92400e; }
.status-tag.blocked { background: var(--danger-bg); color: #991b1b; }
.table-scroll { overflow-x: auto; }
.secret-box {
  margin-top: 10px; padding: 12px; border-radius: 8px; background: var(--warn-bg);
  border: 1px solid #fcd34d; font-size: 0.9rem; word-break: break-all;
}
.secret-box code { background: white; padding: 2px 6px; border-radius: 4px; font-size: 0.95rem; }

/* ---------- eksport do PDF ---------- */
/* Sam dokument sklada i renderuje serwer (web/pdf.js) — tutaj zostaje tylko
   powiadomienie o postepie i link do pobrania. */
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%);
  background: #0f172a; color: white; padding: 12px 18px; border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0,0,0,.35); z-index: 100;
  font-size: 0.92rem; max-width: min(560px, calc(100vw - 32px)); text-align: center;
}
.toast a { color: #93c5fd; margin-left: 8px; }

.pdf-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 9px 0; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.pdf-row:last-child { border-bottom: none; }
.pdf-row .name { word-break: break-all; }