/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--accent-blue);
  color: #fff;
  border-color: var(--accent-blue);
  box-shadow: 0 2px 12px rgba(91,141,238,0.35);
}
.btn-primary:hover {
  background: #6a9cf0;
  box-shadow: 0 4px 20px rgba(91,141,238,0.5);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn-ghost:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-light);
}

.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-full { width: 100%; justify-content: center; }

/* Header action buttons — nieco większe niż btn-sm */
.header-actions .btn-sm {
  padding: 8px 16px;
  font-size: 13.5px;
}

.btn-hint {
  background: rgba(245, 200, 66, 0.1);
  color: var(--accent-yellow);
  border: 1px solid rgba(245, 200, 66, 0.3);
  border-radius: var(--radius-md);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn-hint:hover {
  background: rgba(245, 200, 66, 0.18);
  border-color: rgba(245, 200, 66, 0.5);
}
.btn-hint:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-success-outline {
  background: rgba(76,175,125,0.1);
  color: var(--accent-green);
  border: 1px solid rgba(76,175,125,0.35);
}
.btn-success-outline:hover {
  background: rgba(76,175,125,0.2);
  border-color: var(--accent-green);
}

.btn-danger-outline {
  background: rgba(242,95,95,0.1);
  color: var(--accent-red);
  border: 1px solid rgba(242,95,95,0.35);
}
.btn-danger-outline:hover {
  background: rgba(242,95,95,0.2);
  border-color: var(--accent-red);
}

/* ===== SELECT ===== */
.select {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 9px 36px 9px 14px;
  font-size: 14px;
  font-family: var(--font-sans);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235a6480' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  min-width: 200px;
  max-width: 100%;
  transition: border-color var(--transition);
}
.select:hover { border-color: var(--border-light); }
.select:focus { border-color: var(--accent-blue); outline: none; }

/* ===== DIFFICULTY TABS ===== */
.difficulty-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 4px;
}
/* ===== UTILITY ===== */
.hidden { display: none !important; }

/* ===== MODE TABS ===== */
.mode-tabs-wrapper {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  position: sticky;
  top: 60px;
  z-index: 50;
}
.mode-tabs {
  display: flex;
  gap: 4px;
  max-width: 1400px;
  margin: 0 auto;
}
.mode-tab {
  padding: 14px 24px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all var(--transition);
}
.mode-tab:hover {
  color: var(--text-secondary);
}
.mode-tab.active {
  color: var(--accent-blue);
  border-bottom-color: var(--accent-blue);
}

/* ===== TASK SOURCE BADGE ===== */
.task-source-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  background: rgba(245, 200, 66, 0.15);
  color: var(--accent-yellow);
  border: 1px solid var(--accent-yellow);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

/* ===== DIFFICULTY TABS ===== */
.tab-btn,
.diff-btn {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition);
}
.tab-btn:hover, .diff-btn:hover { color: var(--text-secondary); background: var(--bg-hover); }
.tab-btn.active, .diff-btn.active {
  background: var(--accent-blue);
  color: #fff;
  box-shadow: 0 2px 8px rgba(91,141,238,0.4);
}

/* ===== TASK PLACEHOLDER ===== */
.task-placeholder {
  background: var(--bg-card);
  border: 1px dashed var(--border-light);
  border-radius: var(--radius-xl);
  padding: 60px 40px;
  text-align: center;
}
.placeholder-icon { font-size: 48px; margin-bottom: 16px; }
.task-placeholder h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.task-placeholder p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
}
.placeholder-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}
.cat-tag {
  padding: 4px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 99px;
  font-size: 12px;
  color: var(--text-muted);
}

/* ===== TASK CARD ===== */
.task-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  animation: slideIn 0.3s ease;
}
@keyframes slideIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.task-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
}
.task-meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* Badges */
.task-category-badge,
.task-points-badge,
.task-diff-badge {
  padding: 3px 10px;
  border-radius: 99px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.task-category-badge {
  background: rgba(91,141,238,0.15);
  color: var(--accent-blue);
  border: 1px solid rgba(91,141,238,0.3);
}
.task-points-badge {
  background: rgba(76,175,125,0.12);
  color: var(--accent-green);
  border: 1px solid rgba(76,175,125,0.3);
}
.task-diff-badge {
  background: rgba(245,200,66,0.12);
  color: var(--accent-yellow);
  border: 1px solid rgba(245,200,66,0.3);
}
.task-diff-badge.easy  { background: rgba(76,175,125,0.1); color: var(--accent-green); border-color: rgba(76,175,125,0.25); }
.task-diff-badge.medium{ background: rgba(245,200,66,0.1); color: var(--accent-yellow); border-color: rgba(245,200,66,0.25); }
.task-diff-badge.hard  { background: rgba(242,95,95,0.1);  color: var(--accent-red);    border-color: rgba(242,95,95,0.25); }

/* TASK STATEMENT */
.task-statement {
  padding: 28px 28px 20px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-primary);
}
.task-statement p { margin-bottom: 10px; }
.task-statement strong { color: var(--text-primary); font-weight: 700; }

/* ===== INLINE CONFIRM ===== */
.inline-confirm {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 10px 14px;
  background: rgba(242,95,95,0.07);
  border: 1px solid rgba(242,95,95,0.25);
  border-radius: var(--radius-md);
  animation: fadeIn 0.15s ease;
}
.inline-confirm-msg {
  font-size: 13px;
  color: var(--text-secondary);
  flex: 1;
  min-width: 180px;
}
.inline-confirm-msg strong {
  color: var(--accent-red);
}

/* HINTS */
.hints-zone {
  padding: 0 28px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.hints-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.hint-item {
  background: rgba(245,200,66,0.06);
  border: 1px solid rgba(245,200,66,0.2);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  animation: fadeIn 0.25s ease;
}
.hint-item .hint-level {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-yellow);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 5px;
}
/* Kolorowe oznaczenia poziomów wskazówek */
.hint-item--level1 .hint-level { color: var(--accent-yellow); }
.hint-item--level2 .hint-level { color: var(--accent-blue); }
.hint-item--level3 .hint-level { color: var(--accent-green); }
.hint-item--level2 { border-color: rgba(91,141,238,0.25); background: rgba(91,141,238,0.05); }
.hint-item--level3 { border-color: rgba(76,175,125,0.25); background: rgba(76,175,125,0.05); }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ANSWER ZONE */
.answer-zone {
  padding: 20px 28px 28px;
  border-top: 1px solid var(--border);
}
.answer-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ===== SOLUTION PANEL ===== */
.solution-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  animation: slideIn 0.3s ease;
}
.solution-header {
  padding: 20px 24px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}
.solution-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.solution-answer-box {
  background: rgba(76,175,125,0.08);
  border: 1px solid rgba(76,175,125,0.25);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-size: 15px;
  color: var(--text-primary);
}
.solution-answer-box .answer-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-green);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

/* SOLUTION STEPS */
.solution-steps {
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.solution-step {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 14px;
  align-items: start;
}
.step-number {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(91,141,238,0.15);
  border: 2px solid rgba(91,141,238,0.4);
  color: var(--accent-blue);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}
.step-content {}
.step-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent-blue);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.step-math {
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.8;
  margin-bottom: 5px;
}
.step-explanation {
  font-size: 13px;
  color: var(--text-muted);
  font-style: italic;
  line-height: 1.5;
}

/* ===== RESULT FEEDBACK ===== */
.result-feedback {
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.result-feedback.correct {
  background: rgba(76,175,125,0.12);
  border: 1px solid rgba(76,175,125,0.35);
  color: var(--accent-green);
}
.result-feedback.wrong {
  background: rgba(242,95,95,0.1);
  border: 1px solid rgba(242,95,95,0.3);
  color: var(--accent-red);
}

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(6px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  box-sizing: border-box;
}
@media (max-width: 480px) {
  .modal-overlay {
    align-items: flex-end;
    padding: 0;
  }
}
.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  max-width: 700px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.25s ease;
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}
.modal-header h2 { font-size: 17px; font-weight: 700; }
.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 16px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.modal-close:hover { background: var(--bg-hover); color: var(--text-primary); }
.modal-body { padding: 24px; }

/* ===== MODAL STATS ===== */
.modal-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}
.modal-stat-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}
.modal-stat-card .val {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent-blue);
}
.modal-stat-card .lbl {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}
.modal-cat-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.modal-cat-item {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 10px;
}
.modal-cat-info {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.modal-cat-name {
  font-size: 13px;
  color: var(--text-secondary);
}
.modal-cat-bar-track {
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 99px;
  overflow: hidden;
}
.modal-cat-bar-fill {
  height: 100%;
  border-radius: 99px;
  transition: width 0.5s ease;
}
.modal-cat-score {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* ===== TOAST ===== */
.toast {
  position: fixed;
  bottom: 28px;
  right: 28px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 14px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  z-index: 300;
  display: none;
  pointer-events: none;
}
.toast.show {
  display: block;
  animation: toastIn 0.3s ease;
}
.toast-success { border-color: var(--accent-green); color: var(--accent-green); }
.toast-warning { border-color: var(--accent-yellow); color: var(--accent-yellow); }
.toast-error   { border-color: var(--accent-red);   color: var(--accent-red); }
@keyframes toastIn {
  from { opacity: 0; transform: translateY(16px) scale(0.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ===== LOADING ===== */
.loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Collapsible solution step animation */
.solution-steps .solution-step {
  animation: fadeIn 0.2s ease both;
}
.solution-steps .solution-step:nth-child(1) { animation-delay: 0.05s; }
.solution-steps .solution-step:nth-child(2) { animation-delay: 0.12s; }
.solution-steps .solution-step:nth-child(3) { animation-delay: 0.19s; }
.solution-steps .solution-step:nth-child(4) { animation-delay: 0.26s; }
.solution-steps .solution-step:nth-child(5) { animation-delay: 0.33s; }

/* ===== SYMULACJA MATURY — PASEK NAWIGACJI ===== */
.exam-nav {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
}
.exam-nav-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.exam-nav-pills {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  flex: 1;
}
.exam-pill {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border);
  background: var(--bg-primary);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.exam-pill:hover   { border-color: var(--accent-blue); color: var(--accent-blue); }
.exam-pill.active  { border-color: var(--accent-blue); background: var(--accent-blue); color: #fff; }
.exam-pill.correct { border-color: var(--accent-green); background: var(--accent-green); color: #fff; }
.exam-pill.wrong   { border-color: var(--accent-red);   background: var(--accent-red);   color: #fff; }
.exam-pill.skipped { border-color: var(--accent-yellow); background: var(--bg-primary); color: var(--accent-yellow); }

.exam-nav-score {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  border: 1px solid var(--border);
}

/* ===== KARTA PODSUMOWANIA ARKUSZA ===== */
.exam-summary-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  animation: fadeIn 0.4s ease;
}
.exam-summary-card h2 {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}
.exam-score-big {
  font-size: 3.5rem;
  font-weight: 800;
  margin: 1rem 0;
}
.exam-score-big.pass  { color: var(--accent-green); }
.exam-score-big.fail  { color: var(--accent-red); }
.exam-score-label {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}
.exam-breakdown {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 10px;
  margin: 1.5rem 0;
  text-align: left;
}
.exam-breakdown-row {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 13px;
}
.exam-breakdown-row .task-num { font-weight: 700; color: var(--text-secondary); }
.exam-breakdown-row .cat-name { color: var(--text-secondary); font-size: 12px; }
.exam-breakdown-row.correct-row { border-color: var(--accent-green); }
.exam-breakdown-row.wrong-row   { border-color: var(--accent-red); }
.exam-breakdown-row.skip-row    { border-color: var(--accent-yellow); }

/* ===== AUTH ===== */
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-light);
}
.btn-outline:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  background: rgba(91,141,238,0.08);
}
.btn-danger {
  background: var(--accent-red);
  color: #fff;
  border-color: var(--accent-red);
}
.btn-danger:hover { background: #d94545; }

.user-btn {
  display: flex;
  align-items: center;
  gap: 8px;
}
.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.user-email-short {
  font-size: 13px;
  color: var(--text-secondary);
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Auth modal */
.auth-modal {
  max-width: 400px;
  padding: 36px 32px 32px;
  text-align: center;
}
.auth-logo {
  font-size: 36px;
  font-weight: 900;
  color: var(--accent-blue);
  margin-bottom: 8px;
  line-height: 1;
}
.auth-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 6px;
}
.auth-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0 0 24px;
}
.auth-tabs {
  display: flex;
  gap: 2px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 3px;
  margin-bottom: 24px;
}
.auth-tab {
  flex: 1;
  padding: 8px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  border-radius: calc(var(--radius-md) - 2px);
  transition: all var(--transition);
}
.auth-tab.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-align: left;
}
.auth-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.auth-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.auth-input {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 11px 14px;
  font-size: 14px;
  font-family: var(--font-sans);
  color: var(--text-primary);
  transition: border-color var(--transition);
  width: 100%;
  box-sizing: border-box;
}
.auth-input:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(91,141,238,0.18);
}
.auth-input::placeholder { color: var(--text-muted); }
.auth-error {
  font-size: 13px;
  color: var(--accent-red);
  background: rgba(242,95,95,0.1);
  border: 1px solid rgba(242,95,95,0.25);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
}
.auth-submit {
  width: 100%;
  justify-content: center;
  margin-top: 4px;
}
.auth-submit.loading {
  opacity: 0.7;
  pointer-events: none;
}

/* User modal */
.user-modal {
  max-width: 300px;
  padding: 32px 28px;
  text-align: center;
}
.user-modal-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin: 0 auto 12px;
}
.user-modal-email {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  word-break: break-all;
}
.user-modal-sync {
  font-size: 12px;
  color: var(--accent-green);
}
.user-modal-plan {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  padding: 4px 12px;
  border-radius: 20px;
  display: inline-block;
}
.user-modal-plan.plan-free   { background: rgba(255,255,255,0.06); color: var(--text-muted); }
.user-modal-plan.plan-pro    { background: rgba(91,141,238,0.15);  color: var(--accent-blue); }
.user-modal-plan.plan-max    { background: rgba(167,139,250,0.15); color: var(--accent-purple); }

/* ===== LIMIT BADGE (header) ===== */
.limit-badge {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}
.limit-badge.plan-free   { background: rgba(255,255,255,0.06); color: var(--text-muted); }
.limit-badge.plan-pro    { background: rgba(91,141,238,0.12);  color: var(--accent-blue); }
.limit-badge.plan-max    { background: rgba(167,139,250,0.12); color: var(--accent-purple); }
.limit-badge .limit-low  { color: var(--accent-red); font-weight: 700; }

/* ===== LANDING CARD ===== */
.landing-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 56px 32px 48px;
  gap: 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.landing-icon {
  font-size: 3.5rem;
  line-height: 1;
  color: var(--accent-blue);
  font-weight: 700;
}
.landing-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
}
.landing-desc {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
  max-width: 480px;
}
.landing-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.landing-plan-preview {
  display: flex;
  gap: 12px;
  margin-top: 8px;
  flex-wrap: wrap;
  justify-content: center;
}
.lpp-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  min-width: 120px;
  text-align: center;
}
.lpp-card--featured {
  border-color: var(--accent-blue);
  background: rgba(91,141,238,0.07);
}
.lpp-name  { font-weight: 700; font-size: 14px; color: var(--text-primary); }
.lpp-desc  { font-size: 12px; color: var(--text-secondary); margin: 4px 0; }
.lpp-price { font-size: 13px; font-weight: 600; color: var(--accent-blue); }

/* ===== PRICING MODAL ===== */
.pricing-modal {
  max-width: 820px;
  width: 96%;
  padding: 32px;
}
.pricing-header { text-align: center; margin-bottom: 8px; }
.pricing-header h2 { font-size: 1.5rem; font-weight: 700; }
.pricing-sub { color: var(--text-secondary); font-size: 14px; margin-top: 6px; }

.pricing-limit-msg {
  background: rgba(242,95,95,0.1);
  border: 1px solid rgba(242,95,95,0.3);
  border-radius: var(--radius-md);
  color: var(--accent-red);
  font-size: 13px;
  padding: 10px 16px;
  margin: 16px 0 4px;
  text-align: center;
}

.pricing-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}
@media (max-width: 600px) {
  .pricing-cards { grid-template-columns: 1fr; }
}

.pricing-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  background: var(--bg-secondary);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.pricing-card--featured {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 1px var(--accent-blue), var(--glow-blue);
  background: rgba(91,141,238,0.05);
}

.pc-popular {
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-blue);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 14px;
  border-radius: 20px;
  white-space: nowrap;
  letter-spacing: 0.03em;
}
.pc-current-tag {
  position: absolute;
  top: -11px;
  right: 16px;
  background: var(--accent-green);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
}

.pc-name {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.pc-price-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 4px;
}
.pc-amount {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}
.pc-period {
  font-size: 13px;
  color: var(--text-muted);
}
.pc-features {
  list-style: none;
  padding: 0;
  margin: 16px 0 20px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  flex: 1;
}
.pc-feat {
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 7px;
}
.pc-feat--yes { color: var(--text-secondary); }
.pc-feat--no  { color: var(--text-muted); }
.pc-feat--yes::before { content: '✓'; color: var(--accent-green); font-weight: 700; flex-shrink: 0; }
.pc-feat--no::before  { content: '✗'; color: var(--text-muted);   font-weight: 700; flex-shrink: 0; }
.pc-feat { list-style: none; }
.pc-feat::before { display: none; } /* using text icons in JS */

.pc-btn { margin-top: auto; }

.btn-outline {
  background: transparent;
  color: var(--accent-blue);
  border: 1px solid var(--accent-blue);
}
.btn-outline:hover {
  background: rgba(91,141,238,0.1);
}
/* ===== PROMO CODE ===== */
.promo-section { margin-top: 14px; }
.promo-row {
  display: flex;
  gap: 8px;
}
.promo-input {
  flex: 1;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 13px;
  padding: 7px 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  outline: none;
  transition: border-color var(--transition);
}
.promo-input:focus { border-color: var(--accent-blue); }
.promo-input::placeholder { text-transform: none; letter-spacing: normal; color: var(--text-muted); }
.promo-msg {
  font-size: 12px;
  margin-top: 7px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
}
.promo-msg--ok  { background: rgba(76,175,125,0.12); color: var(--accent-green); }
.promo-msg--err { background: rgba(242,95,95,0.12);  color: var(--accent-red); }

.btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px 20px;
  background: #fff;
  color: #3c4043;
  border: 1px solid #dadce0;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: box-shadow var(--transition), background var(--transition);
  margin-top: 8px;
}
.btn-google:hover {
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  background: #f8f9fa;
}
.btn-danger {
  background: rgba(242,95,95,0.15);
  color: var(--accent-red);
  border: 1px solid rgba(242,95,95,0.3);
}
.btn-danger:hover {
  background: rgba(242,95,95,0.25);
}

/* ===== USERNAME MODAL ===== */
.username-modal {
  max-width: 400px;
  padding: 36px 32px 28px;
  text-align: center;
}
.un-icon  { font-size: 3rem; margin-bottom: 8px; line-height: 1; }
.un-title { font-size: 1.3rem; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.un-desc  { font-size: 13px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 20px; }
.un-input-wrap { margin-bottom: 16px; text-align: left; }
.un-input {
  width: 100%;
  box-sizing: border-box;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  padding: 12px 14px;
  letter-spacing: 0.02em;
  transition: border-color var(--transition);
  outline: none;
}
.un-input:focus { border-color: var(--accent-blue); box-shadow: 0 0 0 3px rgba(91,141,238,0.18); }
.un-hint  { font-size: 11px; color: var(--text-muted); margin-top: 6px; }
.un-error {
  font-size: 12px; color: var(--accent-red);
  background: rgba(242,95,95,0.1);
  border: 1px solid rgba(242,95,95,0.25);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  margin-top: 8px;
}
.un-skip  {
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-muted);
  border-color: transparent;
}
.un-skip:hover { color: var(--text-secondary); }

/* Username row w user modal */
.um-username-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 8px;
  margin-top: 2px;
}
.um-username {
  font-size: 15px;
  font-weight: 700;
  color: var(--accent-blue);
  letter-spacing: 0.01em;
}
.um-username--empty { color: var(--text-muted); font-weight: 400; font-style: italic; }

/* ===== RANKING MODAL ===== */
.ranking-modal {
  max-width: 560px;
  width: 96%;
  padding: 28px 28px 24px;
}
.ranking-header { text-align: center; margin-bottom: 20px; }
.ranking-header h2 { font-size: 1.4rem; font-weight: 700; }
.ranking-sub { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* Zakładki */
.ranking-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 4px;
  margin-bottom: 20px;
}
.ranking-tab {
  flex: 1;
  padding: 8px 6px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  border-radius: calc(var(--radius-md) - 2px);
  transition: all var(--transition);
  white-space: nowrap;
}
.ranking-tab:hover { color: var(--text-secondary); }
.ranking-tab.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: 0 1px 4px rgba(0,0,0,0.35);
}

/* Lista */
.ranking-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.ranking-row {
  display: grid;
  grid-template-columns: 36px 1fr auto auto;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition);
}
.ranking-row--me {
  border-color: var(--accent-blue);
  background: rgba(91,141,238,0.07);
}
.ranking-pos {
  font-size: 18px;
  text-align: center;
  line-height: 1;
  width: 36px;
}
.ranking-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ranking-you {
  font-size: 11px;
  font-weight: 500;
  color: var(--accent-blue);
  margin-left: 4px;
}
.ranking-val {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1px;
}
.ranking-val span {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
}
.ranking-val small {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Plan badge w rankingu */
.rb-plan {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 20px;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.rb-plan--free { background: rgba(255,255,255,0.06); color: var(--text-muted); }
.rb-plan--pro  { background: rgba(91,141,238,0.15);  color: var(--accent-blue); }
.rb-plan--max  { background: rgba(167,139,250,0.15); color: var(--accent-purple); }

.ranking-separator {
  text-align: center;
  color: var(--text-muted);
  font-size: 18px;
  letter-spacing: 6px;
  padding: 4px 0;
}
.ranking-note {
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
  margin-top: 8px;
  font-style: italic;
}
.ranking-loading,
.ranking-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
  font-size: 14px;
}

/* ===== LEVEL MODAL ===== */
.level-modal {
  max-width: 420px;
  text-align: center;
  padding: 36px 28px 32px;
}
.level-icon { font-size: 40px; margin-bottom: 12px; }
.level-title { font-size: 1.4rem; font-weight: 700; margin: 0 0 8px; }
.level-desc { color: var(--text-muted); font-size: 0.9rem; margin: 0 0 28px; line-height: 1.5; }
.level-cards {
  display: flex;
  gap: 16px;
  justify-content: center;
}
.level-card {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 24px 16px;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.08);
  cursor: pointer;
  transition: border-color 0.15s, transform 0.1s, background 0.15s;
  font-family: inherit;
}
.level-card:hover {
  border-color: var(--accent-blue);
  background: rgba(255,255,255,0.13);
  transform: translateY(-2px);
}
.level-card-icon { font-size: 36px; }
.level-card-name { font-size: 1.05rem; font-weight: 700; color: var(--text-primary); }
.level-card-desc { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.4; }

/* ===== MODAL BOX (glass) ===== */
.modal-box {
  background: rgba(10, 13, 30, 0.92);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-xl);
  width: 100%;
  max-height: calc(100dvh - 32px);
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.7), 0 0 0 1px rgba(255,255,255,0.05);
  position: relative;
  animation: modalIn 0.22s cubic-bezier(.34,1.2,.64,1);
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(0.94) translateY(12px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}
@media (max-width: 480px) {
  .modal-box {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    max-height: 92dvh;
    width: 100%;
    animation: modalSlideUp 0.28s cubic-bezier(.25,.8,.25,1);
  }
  @keyframes modalSlideUp {
    from { opacity: 0; transform: translateY(40px); }
    to   { opacity: 1; transform: translateY(0); }
  }
}

/* Task card — glass */
.task-card, .solution-panel {
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.08);
}
.task-header, .solution-header {
  background: rgba(255,255,255,0.03);
}

/* Select — glass */
.select {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-primary);
}
.select:focus { border-color: var(--accent-blue); box-shadow: 0 0 0 3px rgba(96,151,255,0.15); }

/* Landing card — glass */
.landing-card {
  background: rgba(255,255,255,0.03);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.08);
}

/* Pricing cards — glass */
.pricing-card {
  background: rgba(255,255,255,0.03);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.08);
}
.pricing-card--featured {
  background: rgba(96,151,255,0.07);
  border-color: rgba(96,151,255,0.4);
  box-shadow: 0 0 0 1px rgba(96,151,255,0.2), 0 0 30px rgba(96,151,255,0.12);
}

/* Ranking rows — glass */
.ranking-row {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
}
.ranking-row--me {
  background: rgba(96,151,255,0.07);
  border-color: rgba(96,151,255,0.3);
}

/* ===== RESPONSIVE COMPONENTS ===== */
@media (max-width: 640px) {
  /* Task card */
  .task-statement { padding: 20px 18px 14px; font-size: 15px; }
  .hints-zone { padding: 0 18px 14px; }
  .answer-zone { padding: 14px 18px 20px; }
  .answer-buttons { gap: 8px; }
  .answer-buttons .btn { flex: 1 1 auto; justify-content: center; min-width: 0; }

  /* Solution */
  .solution-header { padding: 16px 18px; }
  .solution-steps { padding: 16px 18px; }

  /* Task header */
  .task-header { padding: 12px 18px; }

  /* Landing */
  .landing-card { padding: 36px 20px 32px; gap: 14px; }
  .landing-title { font-size: 1.4rem; }
  .landing-plan-preview { gap: 8px; }
  .lpp-card { min-width: 100px; padding: 10px 14px; }

  /* Pricing modal */
  .pricing-modal { padding: 24px 18px 20px; }
  .pricing-cards { gap: 12px; margin-top: 16px; }

  /* Auth modal */
  .auth-modal { padding: 28px 20px 24px; }

  /* Username modal */
  .username-modal { padding: 28px 20px 22px; }

  /* Modal stats */
  .modal-stats-grid { grid-template-columns: repeat(3,1fr); gap: 8px; }
  .modal-stat-card { padding: 10px; }
  .modal-stat-card .val { font-size: 22px; }
  .modal-body { padding: 16px; }

  /* Level modal */
  .level-modal { padding: 28px 20px 24px; }

  /* Ranking modal */
  .ranking-modal { padding: 0; }
}

@media (max-width: 420px) {
  /* Level cards — stack vertically */
  .level-cards { flex-direction: column; gap: 10px; }
  .level-card { padding: 16px 14px; flex-direction: row; gap: 12px; text-align: left; justify-content: flex-start; }
  .level-card-icon { font-size: 28px; flex-shrink: 0; }

  /* Answer buttons — full width stacked */
  .answer-buttons { flex-direction: column; }
  .answer-buttons .btn { width: 100%; justify-content: center; }

  /* Select full width */
  .select { min-width: 0; width: 100%; }
  .control-group { width: 100%; }

  /* Limit badge — hide on very small */
  .limit-badge { display: none; }

  /* Modal stats - 2 cols on tiny */
  .modal-stats-grid { grid-template-columns: repeat(2,1fr); }

  /* Exam pills smaller */
  .exam-pill { width: 28px; height: 28px; font-size: 11px; }
}

/* ===== ZADANIA ZAMKNIĘTE (A/B/C/D) ===== */
.closed-options { margin: 16px 0 8px; }
.closed-options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.opt-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.04);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text-primary);
  text-align: left;
  transition: all var(--transition);
  min-height: 52px;
}
.opt-btn:hover:not(:disabled) {
  border-color: var(--accent-blue);
  background: rgba(96,151,255,0.08);
}
.opt-btn:disabled { cursor: default; }
.opt-btn.correct {
  border-color: var(--accent-green);
  background: rgba(74,222,128,0.12);
}
.opt-btn.wrong {
  border-color: var(--accent-red);
  background: rgba(248,113,113,0.12);
}
.opt-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--border);
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  flex-shrink: 0;
  transition: all var(--transition);
}
.opt-btn.correct .opt-label { background: var(--accent-green); color: #fff; }
.opt-btn.wrong   .opt-label { background: var(--accent-red);   color: #fff; }
.opt-text { flex: 1; line-height: 1.4; }

/* Separator sekcji I / II w exam-nav */
.exam-section-sep {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 34px;
  padding: 0 6px;
  font-size: 10px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-right: 1px solid var(--border);
  margin-right: 2px;
}

/* Pill dla zadań otwartych — kwadratowy ale z innym obramowaniem */
.exam-pill.exam-pill-open {
  border-style: dashed;
}

@media (max-width: 500px) {
  .closed-options-grid { grid-template-columns: 1fr; }
}

/* ===== DODATKOWE POPRAWKI MOBILNE ===== */

/* Większe strefy dotyku na telefonie */
@media (hover: none) {
  .btn { min-height: 44px; }
  .btn-sm { min-height: 40px; }
  .btn-hint { min-height: 44px; }
  .opt-btn { min-height: 56px; }
  .select { min-height: 44px; font-size: 16px; } /* font-size 16px zapobiega zoomowi na iOS */
  .auth-input { font-size: 16px; }               /* j.w. */
  .mode-tab { min-height: 44px; }
  .exam-pill { width: 38px; height: 38px; }
}

/* Zadanie — lepsza czytelność na małym ekranie */
@media (max-width: 640px) {
  .task-statement { font-size: 15px; line-height: 1.8; }
  .step-math { font-size: 14px; }
  /* KaTeX overflow — poziomy scroll zamiast wylewania się */
  .task-statement .katex-display,
  .step-math .katex-display {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
  }
}

/* Control panel — select full width na mobile */
@media (max-width: 480px) {
  .control-panel-inner { flex-direction: column; align-items: stretch; }
  .control-group { width: 100%; }
  .select { width: 100%; min-width: 0; }
  .control-panel-inner .btn { width: 100%; justify-content: center; }
}

/* Symulacja matury — przycisk generuj full width */
@media (max-width: 480px) {
  #control-panel-symulacja .control-panel-inner { padding: 10px; }
  #btn-start-exam { width: 100%; justify-content: center; }
}

/* Modal — na małym ekranie zajmuje pełną szerokość */
@media (max-width: 480px) {
  .pricing-modal { padding: 20px 14px 16px; }
  .ranking-modal { padding: 20px 14px 16px; }
  .modal-stats-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
}

/* Toast — na dole, pełna szerokość na mobile */
@media (max-width: 480px) {
  .toast {
    bottom: 0;
    right: 0;
    left: 0;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    text-align: center;
  }
}