* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --border: #e2e8f0;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.hidden { display: none !important; }

/* ===== HEADER ===== */
header {
  background: linear-gradient(135deg, #1e40af, #3b82f6);
  color: #fff;
  padding: 26px 20px;
  text-align: center;
  box-shadow: 0 4px 14px rgba(30,64,175,.2);
}
header h1 { font-size: 1.8rem; margin-bottom: 6px; }
.subtitle { opacity: .92; font-size: .95rem; }

.controls {
  margin-top: 16px;
  display: flex; gap: 10px; flex-wrap: wrap;
  justify-content: center; align-items: center;
}
.controls input[type="search"] {
  padding: 10px 16px; border-radius: 22px; border: none;
  min-width: 240px; font-size: .9rem;
}
.controls input[type="search"]:focus { outline: 2px solid #facc15; }
.controls select {
  padding: 10px 14px; border-radius: 22px; border: none;
  font-size: .85rem; max-width: 220px; cursor: pointer;
}
.controls button {
  padding: 10px 18px; border-radius: 22px; border: none;
  background: #facc15; color: #1e293b; font-weight: 700;
  cursor: pointer; font-size: .9rem;
}
.controls button:hover { background: #eab308; }
.rate-label {
  display: flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.18); padding: 7px 14px;
  border-radius: 22px; font-size: .85rem;
}
.rate-label input { width: 90px; }

/* ===== ZAKŁADKI ===== */
nav#tabs {
  display: flex; justify-content: center; gap: 10px;
  padding: 16px; background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,.05);
  position: sticky; top: 0; z-index: 10;
}
.tab {
  padding: 11px 26px; border-radius: 26px;
  border: 2px solid var(--primary);
  background: #fff; color: var(--primary);
  font-weight: 700; cursor: pointer; font-size: .92rem;
  transition: .2s;
}
.tab:hover { background: #eff6ff; }
.tab.active { background: var(--primary); color: #fff; }

/* ===== KARTY LEKCJI ===== */
main {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  padding: 26px;
  max-width: 1400px;
  margin: 0 auto;
}
.card {
  background: var(--card);
  border-radius: 16px;
  padding: 20px;
  border: 1px solid var(--border);
  box-shadow: 0 3px 12px rgba(0,0,0,.05);
  transition: transform .2s, box-shadow .2s;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(37,99,235,.13);
}
.card h3 {
  color: var(--primary-dark);
  margin-bottom: 8px;
  font-size: 1.08rem;
  font-weight: 700;
}
.card .desc {
  color: var(--muted);
  font-size: .86rem;
  line-height: 1.45;
  margin-bottom: 14px;
  min-height: 2.7em;
}

.levels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px;
}
.level-btn {
  padding: 10px 6px;
  border-radius: 9px;
  border: none;
  font-weight: 700;
  font-size: .8rem;
  cursor: pointer;
  transition: .18s;
  color: #fff;
  letter-spacing: .3px;
}
.level-btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.08);
  box-shadow: 0 4px 10px rgba(0,0,0,.15);
}
.level-btn:active { transform: translateY(0); }

/* Stonowana paleta – profesjonalna, spójna */
.level-btn.A1   { background: #10b981; } /* zielony */
.level-btn.A2   { background: #3b82f6; } /* niebieski */
.level-btn.B1   { background: #f59e0b; } /* bursztyn */
.level-btn.B2   { background: #f97316; } /* pomarańcz */
.level-btn.C1   { background: #ef4444; } /* czerwony */
.level-btn.TEST { background: #8b5cf6; } /* fiolet */

/* ===== MODAL ===== */
.modal {
  position: fixed; inset: 0;
  background: rgba(15,23,42,.75);
  display: flex; justify-content: center; align-items: center;
  z-index: 100; padding: 20px;
  animation: fadeIn .2s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.modal-content {
  background: #fff;
  border-radius: 18px;
  max-width: 980px; width: 100%;
  max-height: 94vh;
  overflow-y: auto;
  padding: 24px;
  display: flex; flex-direction: column; gap: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
}
.modal-header {
  display: flex; justify-content: space-between; align-items: center;
  padding-bottom: 12px; border-bottom: 1px solid var(--border);
}
.modal-header h2 { color: var(--primary-dark); font-size: 1.25rem; }
.modal-header button {
  background: #ef4444; color: #fff; border: none;
  width: 36px; height: 36px; border-radius: 50%;
  cursor: pointer; font-size: 1rem; font-weight: 700;
}
.modal-header button:hover { background: #dc2626; }

.modal-toolbar {
  display: flex; gap: 8px; flex-wrap: wrap; align-items: center;
  background: #f1f5f9; padding: 12px; border-radius: 12px;
}
.modal-toolbar button {
  padding: 9px 16px; border: none; border-radius: 9px;
  background: var(--primary); color: #fff;
  font-weight: 600; cursor: pointer; font-size: .86rem;
  transition: .15s;
}
.modal-toolbar button:hover { background: var(--primary-dark); transform: translateY(-1px); }
.modal-toolbar button:active { transform: translateY(0); }
.toolbar-hint {
  font-size: .8rem; color: var(--muted);
  margin-left: auto; font-style: italic;
}

/* ===== PDF ===== */
#pdfContainer {
  background: #f1f5f9;
  border-radius: 12px;
  padding: 16px;
  max-height: 500px;
  overflow-y: auto;
}
.pdf-pages {
  display: flex; flex-direction: column;
  gap: 18px; align-items: center;
}
.pdf-page-wrap {
  position: relative;
  background: #fff;
  box-shadow: 0 3px 12px rgba(0,0,0,.12);
  border-radius: 4px;
  max-width: 100%;
  overflow: hidden;
}
.pdf-page-wrap canvas {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}
.textLayer {
  position: absolute; inset: 0;
  overflow: hidden;
  line-height: 1;
  opacity: 0.22;
  user-select: text;
}
.textLayer span {
  color: transparent;
  position: absolute;
  white-space: pre;
  cursor: pointer;
  transform-origin: 0% 0%;
}
.textLayer span:hover { background: rgba(37,99,235,.28); }
.textLayer ::selection { background: rgba(250,204,21,.7); }

/* ===== SŁOWNIK ===== */
.dictionary {
  background: #f8fafc;
  border-radius: 12px;
  padding: 16px;
  border: 1px solid var(--border);
}
.dictionary h3 {
  color: var(--primary-dark);
  margin-bottom: 12px;
  font-size: 1.05rem;
}
.dict-input { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.dict-input input {
  flex: 1; min-width: 180px;
  padding: 10px 14px;
  border: 1px solid var(--border); border-radius: 9px;
  font-size: .9rem;
}
.dict-input input:focus { outline: 2px solid var(--primary); border-color: transparent; }
.dict-input button {
  padding: 10px 16px; border: none; border-radius: 9px;
  background: #10b981; color: #fff;
  font-weight: 600; cursor: pointer; font-size: .86rem;
  transition: .15s;
}
.dict-input button:hover { background: #059669; }
.dict-input button#translateBtn { background: #3b82f6; }
.dict-input button#translateBtn:hover { background: #2563eb; }

#wordList { list-style: none; max-height: 240px; overflow-y: auto; }
#wordList li {
  padding: 10px 14px;
  background: #fff;
  margin-bottom: 7px;
  border-radius: 9px;
  border-left: 4px solid var(--primary);
  display: flex; justify-content: space-between; align-items: center;
  font-size: .9rem; gap: 10px;
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
}
#wordList li .pl { color: var(--muted); font-style: italic; }
#wordList li .btns { display: flex; gap: 5px; flex-shrink: 0; }
.icon-btn {
  background: #facc15; border: none; border-radius: 7px;
  padding: 5px 9px; cursor: pointer; font-size: .8rem;
  font-weight: 600; transition: .15s;
}
.icon-btn:hover { background: #eab308; transform: scale(1.05); }
.icon-btn.del { background: #fecaca; color: #991b1b; padding: 5px 10px; }
.icon-btn.del:hover { background: #fca5a5; }

footer {
  text-align: center; padding: 24px;
  color: var(--muted); font-size: .85rem;
}

/* ===== MOBILE ===== */
@media (max-width: 600px) {
  header h1 { font-size: 1.35rem; }
  header { padding: 20px 14px; }
  .controls input[type="search"] { min-width: 100%; }
  main { padding: 16px; gap: 14px; }
  .levels { grid-template-columns: repeat(2, 1fr); }
  .card .desc { font-size: .82rem; }
  .modal-content { padding: 16px; }
  .toolbar-hint { display: none; }
}