:root {
  --bg: #0f1420;
  --bg-soft: #161d2e;
  --card: #1b2336;
  --card-2: #212b42;
  --border: #2c3650;
  --text: #e7ecf5;
  --muted: #94a1bd;
  --accent: #5b8cff;
  --accent-2: #7aa2ff;
  --green: #3fbf7f;
  --green-bg: rgba(63, 191, 127, 0.14);
  --red: #ef5e6e;
  --red-bg: rgba(239, 94, 110, 0.14);
  --amber: #f0b542;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

[data-theme="light"] {
  --bg: #eef1f7;
  --bg-soft: #e3e8f2;
  --card: #ffffff;
  --card-2: #f3f6fc;
  --border: #d8deea;
  --text: #1a2238;
  --muted: #5c6680;
  --accent: #3a6df0;
  --accent-2: #2f5ad6;
  --green: #1f9d5f;
  --green-bg: rgba(31, 157, 95, 0.12);
  --red: #d6394b;
  --red-bg: rgba(214, 57, 75, 0.1);
  --shadow: 0 10px 30px rgba(40, 60, 110, 0.12);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}
/* tło jako warstwa fixed — bez background-attachment:fixed, który psuje się na iOS Safari */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background: radial-gradient(1200px 600px at 70% -10%, var(--bg-soft), var(--bg));
  pointer-events: none;
}

.app {
  max-width: 820px;
  margin: 0 auto;
  padding: 20px max(18px, env(safe-area-inset-right)) calc(60px + env(safe-area-inset-bottom)) max(18px, env(safe-area-inset-left));
}

/* długie polecenia/treści nigdy nie rozpychają layoutu na telefonie */
code, .question-text, .atext, .explanation, .review-q,
.flash-q, .flash-answer, .flash-expl { overflow-wrap: anywhere; }

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}
.brand { display: flex; align-items: center; gap: 14px; }
.logo {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-weight: 800; font-size: 20px;
  border-radius: 12px; box-shadow: var(--shadow);
}
.topbar h1 { font-size: 1.25rem; margin: 0; }
.topbar p { margin: 0; font-size: 0.85rem; }

.icon-btn {
  background: var(--card); border: 1px solid var(--border);
  color: var(--text); width: 40px; height: 40px;
  border-radius: 10px; cursor: pointer; font-size: 1.1rem;
  transition: transform .15s, background .15s;
}
.icon-btn:hover { transform: translateY(-1px); background: var(--card-2); }

/* ---------- Cards ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}
.card.slim { padding: 14px 18px; }
.card h2 { margin: 0 0 14px; font-size: 1.05rem; }

.muted { color: var(--muted); }
.small { font-size: 0.82rem; }
.hidden { display: none !important; }

/* ---------- Progress bars ---------- */
.bar {
  height: 12px; background: var(--card-2);
  border-radius: 999px; overflow: hidden;
  border: 1px solid var(--border);
}
.bar.thin { height: 8px; }
.bar-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--green));
  border-radius: 999px; transition: width .5s ease;
}

/* ---------- Mastery ---------- */
.mastery-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 10px; }
.mastery-head h2 { margin: 0; }
.mastery-pct { font-size: 1.6rem; font-weight: 800; color: var(--green); }
.mastery-card .small { margin: 8px 0 0; }

.lecture-stats {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 8px;
}
.lec-item {
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 0.78rem;
  min-width: 0;          /* pozwól kafelkowi kurczyć się w gridzie (bez tego nazwa rozpycha stronę) */
  overflow: hidden;
}
.lec-item .lec-top { display: flex; justify-content: space-between; margin-bottom: 5px; gap: 6px; }
.lec-item .lec-name { color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.lec-item .lec-num { font-weight: 700; }
.lec-bar { height: 5px; background: var(--border); border-radius: 999px; overflow: hidden; }
.lec-bar > div { height: 100%; background: var(--green); border-radius: 999px; }

/* ---------- Forms ---------- */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 18px;
}
.field { display: flex; flex-direction: column; gap: 6px; font-size: 0.85rem; min-width: 0; }
.field > span { color: var(--muted); }
.field.checkbox { flex-direction: row; align-items: center; gap: 10px; }
.field.checkbox input { width: 18px; height: 18px; accent-color: var(--accent); }
select, input[type="text"], input[type="number"] {
  background: var(--card-2); border: 1px solid var(--border);
  color: var(--text); padding: 10px 12px; border-radius: 10px;
  font-size: 0.92rem; font-family: inherit;
  width: 100%; max-width: 100%; min-width: 0;
}
select:focus, input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.actions.center { justify-content: center; }

/* ---------- Buttons ---------- */
.btn {
  background: var(--card-2); color: var(--text);
  border: 1px solid var(--border); padding: 11px 20px;
  border-radius: 11px; font-size: 0.95rem; font-weight: 600;
  cursor: pointer; font-family: inherit;
  transition: transform .12s, background .15s, border-color .15s, opacity .15s;
}
.btn:hover:not(:disabled) { transform: translateY(-1px); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color: transparent; color: #fff; }
.btn.ghost { background: transparent; }
.btn.danger-ghost { background: transparent; color: var(--red); border-color: var(--red); }
.btn.danger-ghost:hover { background: var(--red-bg); }
.btn.small { padding: 7px 14px; font-size: 0.85rem; }
.file-btn { display: inline-flex; align-items: center; }

/* ---------- Manage ---------- */
details summary { cursor: pointer; font-weight: 600; color: var(--muted); }
details[open] summary { margin-bottom: 14px; }
.manage-row { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.manage code { background: var(--card-2); padding: 1px 6px; border-radius: 5px; }

/* ---------- Przełącznik trybu (Quiz / Fiszki) ---------- */
.mode-switch {
  display: flex; gap: 4px; padding: 4px; margin-bottom: 16px;
  background: var(--card-2); border: 1px solid var(--border); border-radius: 999px;
}
.mode-opt {
  flex: 1; border: none; background: transparent; color: var(--muted);
  padding: 9px 16px; border-radius: 999px; cursor: pointer;
  font-weight: 600; font-family: inherit; font-size: 0.9rem; transition: background .15s, color .15s;
}
.mode-opt.active { background: var(--accent); color: #fff; }

/* ---------- Fiszki ---------- */
.flashcard { perspective: 1200px; margin-top: 14px; cursor: pointer; }
.flash-face {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px 22px; box-shadow: var(--shadow);
  min-height: 240px; display: flex; flex-direction: column; gap: 14px;
  animation: flipIn .35s ease;
}
.flashcard .flash-back { display: none; }
.flashcard.flipped .flash-front { display: none; }
.flashcard.flipped .flash-back { display: flex; }
@keyframes flipIn {
  from { transform: perspective(1200px) rotateY(-90deg); opacity: 0; }
  to { transform: perspective(1200px) rotateY(0); opacity: 1; }
}
.flash-tag {
  align-self: flex-start; font-size: 0.7rem; text-transform: uppercase; letter-spacing: .08em;
  color: var(--muted); border: 1px solid var(--border); padding: 3px 11px; border-radius: 999px;
}
.flash-tag.good { color: var(--green); border-color: var(--green); }
.flash-q { font-size: 1.2rem; font-weight: 600; margin: 0; }
.flash-hint { margin-top: auto; align-self: center; color: var(--muted); font-size: 0.8rem; }
.flash-answer { font-size: 1.14rem; font-weight: 600; margin: 0; }
.flash-answer .k { color: var(--green); }
.flash-answer code, .flash-expl code { background: rgba(127,127,127,.18); padding: 1px 5px; border-radius: 5px; }
.flash-expl { margin: 0; color: var(--muted); }

.flash-foot { display: flex; flex-direction: column; gap: 12px; align-items: center; margin-top: 16px; }
.flash-rate { display: flex; gap: 12px; width: 100%; max-width: 420px; }
.flash-rate .btn { flex: 1; padding: 13px; }
.rate-yes { border-color: var(--green); color: var(--green); }
.rate-yes:hover { background: var(--green-bg); }
.rate-no { border-color: var(--red); color: var(--red); }
.rate-no:hover { background: var(--red-bg); }
#flipBtn { width: 100%; max-width: 420px; }

/* ---------- Quiz ---------- */
.quiz-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; gap: 12px; }
.quiz-meta, .quiz-score { display: flex; align-items: center; gap: 10px; }
.counter { font-weight: 700; font-size: 1.05rem; }
.chip {
  background: var(--card-2); border: 1px solid var(--border);
  padding: 4px 10px; border-radius: 999px; font-size: 0.75rem; color: var(--muted);
  max-width: 320px; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.score-live { font-variant-numeric: tabular-nums; color: var(--muted); font-weight: 600; }

.question-card { margin-top: 14px; }
.question-text { font-size: 1.18rem; font-weight: 600; margin: 0 0 18px; }
.answers { display: flex; flex-direction: column; gap: 10px; }
.answer {
  display: flex; align-items: flex-start; gap: 12px;
  text-align: left; width: 100%;
  background: var(--card-2); border: 1.5px solid var(--border);
  color: var(--text); padding: 14px 16px; border-radius: 12px;
  cursor: pointer; font-size: 1rem; font-family: inherit;
  transition: border-color .15s, background .15s, transform .1s;
}
.answer:hover:not(:disabled) { border-color: var(--accent); transform: translateX(2px); }
.answer:disabled { cursor: default; }
.answer .key {
  flex: 0 0 28px; height: 28px; display: grid; place-items: center;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; font-weight: 700; font-size: 0.85rem;
}
.answer .atext { flex: 1; min-width: 0; }   /* długi tekst łamie się zamiast rozpychać */
.answer.correct { border-color: var(--green); background: var(--green-bg); }
.answer.correct .key { background: var(--green); color: #fff; border-color: var(--green); }
.answer.wrong { border-color: var(--red); background: var(--red-bg); }
.answer.wrong .key { background: var(--red); color: #fff; border-color: var(--red); }
.answer code { background: rgba(127,127,127,.18); padding: 1px 5px; border-radius: 5px; font-size: 0.92em; }

.feedback { margin-top: 18px; padding: 16px; border-radius: 12px; background: var(--card-2); border: 1px solid var(--border); }
.verdict { font-weight: 700; margin-bottom: 6px; }
.verdict.ok { color: var(--green); }
.verdict.no { color: var(--red); }
.explanation { margin: 0; color: var(--text); }
.explanation code { background: rgba(127,127,127,.18); padding: 1px 5px; border-radius: 5px; }

.quiz-foot { display: flex; align-items: center; gap: 16px; margin-top: 18px; flex-wrap: wrap; }
.kbd-hint kbd {
  background: var(--card-2); border: 1px solid var(--border);
  border-bottom-width: 2px; border-radius: 5px; padding: 1px 6px; font-size: 0.75rem;
}

/* ---------- Result ---------- */
.result-card { text-align: center; }
.result-ring { position: relative; width: 160px; height: 160px; margin: 0 auto 8px; }
.result-ring svg { transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: var(--card-2); stroke-width: 10; }
.ring-fill {
  fill: none; stroke: var(--green); stroke-width: 10; stroke-linecap: round;
  stroke-dasharray: 327; stroke-dashoffset: 327;
  transition: stroke-dashoffset 1s ease, stroke .4s;
}
.ring-label {
  position: absolute; inset: 0; display: grid; place-content: center; gap: 2px;
}
.ring-label span { font-size: 2.1rem; font-weight: 800; }
.ring-label small { color: var(--muted); }
.result-card h2 { margin: 6px 0 4px; font-size: 1.4rem; }

.review-filter { display: flex; gap: 8px; margin-bottom: 14px; }
.pill {
  background: var(--card-2); border: 1px solid var(--border); color: var(--muted);
  padding: 6px 14px; border-radius: 999px; cursor: pointer; font-size: 0.85rem; font-family: inherit;
}
.pill.active { background: var(--accent); color: #fff; border-color: transparent; }

.review-list { display: flex; flex-direction: column; gap: 12px; }
.review-item { border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; background: var(--card-2); }
.review-item.ok { border-left: 4px solid var(--green); }
.review-item.no { border-left: 4px solid var(--red); }
.review-q { font-weight: 600; margin: 0 0 8px; }
.review-line { font-size: 0.9rem; margin: 3px 0; }
.review-line .tag { display: inline-block; min-width: 86px; color: var(--muted); }
.review-line .good { color: var(--green); font-weight: 600; }
.review-line .bad { color: var(--red); font-weight: 600; }
.review-expl { font-size: 0.86rem; color: var(--muted); margin: 8px 0 0; }
.review-item code { background: rgba(127,127,127,.18); padding: 1px 5px; border-radius: 5px; }

.footer { text-align: center; margin-top: 24px; }

@media (max-width: 600px) {
  .app { padding: 14px 14px calc(40px + env(safe-area-inset-bottom)); }
  .card { padding: 16px; border-radius: 12px; margin-bottom: 14px; }
  .topbar { margin-bottom: 16px; }
  .topbar h1 { font-size: 1.1rem; }
  .logo { width: 38px; height: 38px; font-size: 18px; }

  .form-grid { grid-template-columns: 1fr; gap: 12px; }
  .question-text { font-size: 1.08rem; }
  .kbd-hint { display: none; }

  /* nagłówek quizu — czytelnie na wąskim ekranie */
  .quiz-head { flex-wrap: wrap; gap: 8px 12px; }
  .chip { max-width: 100%; order: 3; flex-basis: 100%; }
  .quiz-score { margin-left: auto; }

  /* większe, łatwe do trafienia odpowiedzi */
  .answer { padding: 15px 14px; font-size: 1.02rem; }
  .answer:hover:not(:disabled) { transform: none; }

  .lecture-stats { grid-template-columns: 1fr 1fr; }

  /* przyciski na pełną szerokość = wygodny tap */
  .actions { flex-direction: column; align-items: stretch; }
  .actions .btn { width: 100%; }
  .actions.center .btn { width: 100%; }
  .poolInfo, #poolInfo { text-align: center; }
  .manage-row { flex-direction: column; }
  .manage-row .btn, .file-btn { width: 100%; justify-content: center; }

  /* „Dalej” zawsze pod ręką — przyklejony pasek na dole.
     Bez ujemnych marginesów (na iOS powodowały poziome przepełnienie i pomniejszanie strony). */
  .quiz-foot {
    position: sticky;
    bottom: 0;
    margin-top: 14px;
    padding: 12px 0 calc(8px + env(safe-area-inset-bottom));
    background: var(--bg);
    border-top: 1px solid var(--border);
  }
  #nextBtn { width: 100%; padding: 14px; font-size: 1rem; }

  /* fiszki: ocena zawsze pod kciukiem */
  .flash-foot {
    position: sticky; bottom: 0;
    margin-top: 14px;
    padding: 12px 0 calc(8px + env(safe-area-inset-bottom));
    background: var(--bg); border-top: 1px solid var(--border);
  }
  .flash-rate, #flipBtn { max-width: none; }
  .flash-foot .kbd-hint { display: none; }
  .flash-face { min-height: 200px; padding: 20px 16px; }
  .flash-q { font-size: 1.1rem; }
}

@media (max-width: 360px) {
  .lecture-stats { grid-template-columns: 1fr; }
  .quiz-score .btn { padding: 7px 10px; }
}

/* urządzenia dotykowe: nie podświetlaj hoverem, którego nie ma */
@media (hover: none) {
  .answer:hover:not(:disabled) { transform: none; border-color: var(--border); }
  .btn:hover:not(:disabled) { transform: none; }
}