:root {
  color-scheme: light dark;
  --color-bg: #f5f6fa;
  --color-surface: #ffffff;
  --color-text: #1c1e26;
  --color-muted: #6b7280;
  --color-border: #e2e4ea;
  --color-primary: #4361ee;
  --color-primary-dark: #3346c4;
  --color-success: #2e9e5b;
  --color-danger: #d64550;
  --radius: 14px;
  --box-0: #8c1a1a;
  --box-1: #d64550;
  --box-2: #e2703a;
  --box-3: #e2b93a;
  --box-4: #7cb342;
  --box-5: #2e9e5b;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #14151c;
    --color-surface: #1d1f29;
    --color-text: #eceef4;
    --color-muted: #9aa0b0;
    --color-border: #2c2f3b;
  }
}

* {
  box-sizing: border-box;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

html, body {
  margin: 0;
  padding: 0;
}

/* Przewijanie do elementu (np. fokus pola na iPhonie) nie chowa go pod
   przyklejonym nagłówkiem. */
html {
  scroll-padding-top: 88px;
}

body {
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: nowrap;
  gap: 12px;
  padding: 16px 20px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-home-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--color-text);
  white-space: nowrap;
  transition: opacity 0.2s ease;
}

.topbar-home-link:hover {
  opacity: 0.85;
}

.fiszki-logo-svg {
  display: block;
  height: 28px;
  width: auto;
  color: var(--color-text);
}

.fiszki-logo-mark {
  display: block;
  height: 28px;
  width: auto;
}

.topbar-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.topbar-nav::-webkit-scrollbar {
  display: none;
}

.nav-btn {
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.9rem;
  text-decoration: none;
  display: inline-block;
}

.nav-btn.is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

#app {
  flex: 1;
  width: 100%;
  max-width: 780px;
  margin: 0 auto;
  padding: 20px;
}

.mode-section {
  display: none;
}

.mode-section.is-active {
  display: block;
}

.view {
  display: none;
}

.view.is-active {
  display: block;
}

.topic-view {
  display: none;
}

.topic-view.is-active {
  display: block;
}

.subnav {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.subnav-btn {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  padding: 8px 16px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.85rem;
}

.subnav-btn.is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px;
  text-align: center;
}

.stat-card strong {
  display: block;
  font-size: 1.6rem;
}

.stat-card span {
  color: var(--color-muted);
  font-size: 0.8rem;
}

.boxes-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 24px;
}

.boxes-panel h2 {
  margin-top: 0;
  font-size: 1.05rem;
}

.hint {
  color: var(--color-muted);
  font-size: 0.85rem;
  line-height: 1.4;
}

.progress-chart-wrap {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.boxes-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
  min-width: 220px;
}

.box-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.box-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  flex-shrink: 0;
}

.box-label {
  flex: 1;
  font-size: 0.9rem;
}

.box-count {
  font-weight: 600;
  white-space: nowrap;
}

.box-percent {
  font-weight: 400;
  color: var(--color-muted);
  margin-left: 2px;
}

.pie-chart {
  position: relative;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  flex-shrink: 0;
  background: conic-gradient(var(--color-border) 0% 100%);
}

.pie-chart-center {
  position: absolute;
  inset: 18px;
  border-radius: 50%;
  background: var(--color-surface);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.pie-chart-center strong {
  font-size: 1.3rem;
  line-height: 1.1;
}

.pie-chart-center span {
  color: var(--color-muted);
  font-size: 0.7rem;
}

.session-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  border: none;
  border-radius: 999px;
  padding: 12px 20px;
  font-size: 0.95rem;
  cursor: pointer;
  font-weight: 600;
}

/* Link wyglądający jak przycisk (np. "Odśwież aplikację" w Ustawieniach). */
a.btn {
  display: inline-block;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
}

.btn-secondary {
  background: var(--color-border);
  color: var(--color-text);
}

.btn-success {
  background: var(--color-success);
  color: #fff;
}

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}

.btn-link {
  background: transparent;
  color: var(--color-primary);
  padding: 8px 4px;
  text-decoration: none;
  display: inline-block;
}

.btn-wide {
  width: 100%;
}

.study-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.progress-track {
  flex: 1;
  height: 8px;
  border-radius: 999px;
  background: var(--color-border);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--color-primary);
  width: 0%;
  transition: width 0.2s ease;
}

#study-progress-label {
  font-size: 0.85rem;
  color: var(--color-muted);
  white-space: nowrap;
}

.card-wrap {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
}

.flashcard {
  position: relative;
  width: 100%;
  max-width: 480px;
  min-height: 240px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

.flashcard-level {
  position: absolute;
  top: 14px;
  right: 16px;
  display: flex;
  gap: 4px;
}

.flashcard-level span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-border);
}

.flashcard-level span.is-filled {
  background: var(--color-primary);
}

.word-en {
  font-size: 2.2rem;
  font-weight: 700;
  margin: 0;
  word-break: break-word;
}

.word-pl {
  font-size: 1.4rem;
  margin: 0;
  color: var(--color-primary);
  font-weight: 600;
}

.typing-label {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.word-pl-prompt {
  font-size: 2rem;
  font-weight: 700;
  margin: 0;
  color: var(--color-primary);
  word-break: break-word;
}

.typing-verdict {
  margin: 0;
  font-weight: 600;
  font-size: 1.05rem;
}

.typing-verdict-exact {
  color: var(--color-success);
}

.typing-verdict-close {
  color: var(--box-3);
}

.typing-verdict-wrong {
  color: var(--color-danger);
}

.typing-you-typed {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.flashcard-back.is-hidden,
.flashcard-front.is-hidden {
  display: none;
}

.btn-speak {
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
  padding: 10px 18px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 1rem;
}

.study-controls {
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.grade-buttons {
  display: flex;
  gap: 12px;
}

#typing-form,
#grammar-typing-form,
#custom-typing-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.typing-input {
  width: 100%;
  padding: 14px 16px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 1.1rem;
  text-align: center;
}

.typing-input:disabled {
  opacity: 0.6;
}

/* Po sprawdzeniu pole zostaje (z fokusem, żeby klawiatura na iPhonie się nie
   chowała), ale jest tylko do odczytu, a "Sprawdź" znika — zostaje "Dalej". */
.typing-input:read-only {
  opacity: 0.6;
}
form.is-answered button[type="submit"] {
  display: none;
}

.grade-buttons .btn {
  flex: 1;
}

.grade-buttons.is-hidden,
.is-hidden {
  display: none !important;
}

.summary-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  max-width: 480px;
  margin: 40px auto 0;
}

.browse-toolbar {
  margin-bottom: 16px;
}

#browse-search {
  width: 100%;
  padding: 12px 14px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.95rem;
}

.browse-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
}

.browse-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.browse-table th,
.browse-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.browse-table td:nth-child(4) {
  white-space: normal;
}

.browse-table tbody tr:last-child td {
  border-bottom: none;
}

.browse-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 12px;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.row-speak-btn {
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 1rem;
}

.level-pill {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  color: #fff;
}

.settings-group {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 20px;
}

.settings-group h3 {
  margin-top: 0;
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.settings-row select,
.settings-row input[type="number"],
.settings-row input[type="password"] {
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  min-width: 160px;
}

.settings-row-checkbox {
  justify-content: flex-start;
}

.settings-row-checkbox input {
  order: -1;
  margin-right: 8px;
}

.settings-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.footer {
  text-align: center;
  padding: 16px;
  color: var(--color-muted);
  font-size: 0.8rem;
}

/* Override centering for the full site-footer layout */
.site-footer {
  text-align: left;
}

/* ---------- Grammar mode ---------- */

.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

.topic-card {
  text-align: left;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--color-text);
  text-decoration: none;
}

.topic-card:hover {
  border-color: var(--color-primary);
}

.topic-card-icon {
  font-size: 1.8rem;
}

.topic-card-title {
  font-weight: 700;
  font-size: 1.1rem;
}

.topic-card-desc {
  color: var(--color-muted);
  font-size: 0.85rem;
  line-height: 1.4;
}

.topic-card-progress {
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 600;
}

.topic-level-group {
  display: none;
}

.topic-level-group.is-active {
  display: block;
}

.topic-level-heading {
  font-size: 1rem;
  color: var(--color-muted);
  margin: 0 0 12px;
}

.topbar-home-link {
  color: inherit;
  text-decoration: none;
}

.topic-items-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
}

.topic-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px 18px;
  cursor: pointer;
  color: var(--color-text);
  text-align: left;
  font-size: 0.95rem;
}

.topic-item-row:hover {
  border-color: var(--color-primary);
}

.topic-item-name-pl {
  font-weight: 600;
}

.topic-item-name-en {
  color: var(--color-muted);
  font-size: 0.85rem;
}

.topic-item-detail h2 {
  margin-top: 8px;
  margin-bottom: 4px;
}

.topic-item-detail .topic-item-detail-en {
  color: var(--color-muted);
  margin-top: 0;
  margin-bottom: 20px;
}

.topic-detail-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 16px;
}

.topic-detail-section h3 {
  margin-top: 0;
  font-size: 1rem;
}

.topic-rule-row {
  display: flex;
  gap: 10px;
  padding: 6px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}

.topic-rule-row:last-child {
  border-bottom: none;
}

.topic-rule-label {
  flex: 0 0 110px;
  color: var(--color-muted);
}

.topic-usage-list,
.topic-examples-list {
  margin: 0;
  padding-left: 20px;
  font-size: 0.9rem;
  line-height: 1.6;
}

.topic-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.topic-tag-pill {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 0.8rem;
  font-family: monospace;
}

.topic-example {
  margin-bottom: 8px;
}

.topic-example-en {
  font-weight: 600;
}

.topic-example-pl {
  color: var(--color-muted);
  font-size: 0.85rem;
}

.grammar-prompt {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 0;
  line-height: 1.5;
  word-break: break-word;
}

.grammar-answer {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
  color: var(--color-primary);
  word-break: break-word;
}

.quiz-card {
  min-height: 160px;
}

.quiz-choices {
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.quiz-choice-btn {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  padding: 14px 18px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1rem;
  text-align: left;
}

.quiz-choice-btn:hover:not(:disabled) {
  border-color: var(--color-primary);
}

.quiz-choice-btn:disabled {
  cursor: default;
}

.quiz-choice-correct {
  border-color: var(--color-success);
  background: color-mix(in srgb, var(--color-success) 15%, var(--color-surface));
}

.quiz-choice-wrong {
  border-color: var(--color-danger);
  background: color-mix(in srgb, var(--color-danger) 15%, var(--color-surface));
}

@media (max-width: 480px) {
  .word-en {
    font-size: 1.7rem;
  }

  .progress-chart-wrap {
    justify-content: center;
    text-align: center;
  }

  .pie-chart {
    margin: 0 auto;
  }

  .boxes-list {
    min-width: 0;
    width: 100%;
    text-align: left;
  }

  .session-actions {
    flex-direction: column;
  }

  .session-actions .btn {
    width: 100%;
  }

  .topic-rule-row {
    flex-direction: column;
    gap: 2px;
  }
  
  .topbar {
    padding: 10px 12px;
    gap: 8px;
  }

  .topbar-home-link .fiszki-logo-svg {
    height: 24px;
  }

  .topbar-right {
    gap: 8px;
  }

  .topbar-nav {
    gap: 6px;
  }

  .topbar-nav .nav-btn {
    padding: 6px 10px;
    font-size: 0.82rem;
  }

  #btn-header-settings-link {
    width: 34px;
    height: 34px;
    min-width: 34px;
    padding: 0;
    border-radius: 50%;
    justify-content: center;
  }

  .user-profile-badge {
    width: 34px;
    height: 34px;
  }

  .topic-rule-label {
    flex: none;
  }
}

.user-profile-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--color-border);
  padding: 0;
  border: 1px solid var(--color-border);
  cursor: pointer;
  flex-shrink: 0;
}
.user-profile-badge img { width: 100%; height: 100%; object-fit: cover; }

.btn-header-signin {
  border-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: 600;
}
.btn-header-signin:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-header-settings-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
  flex-shrink: 0;
}
.btn-header-settings-link:hover {
  background: var(--color-bg);
  border-color: var(--color-muted);
}
.is-hidden { display: none !important; }

.topbar-right { display: flex; align-items: center; gap: 12px; flex-wrap: nowrap; min-width: 0; flex-shrink: 1; }
.auth-header { display: flex; align-items: center; gap: 8px; position: relative; flex-shrink: 0; }
.dropdown-container { position: relative; }
.dropdown-menu { position: absolute; top: 100%; right: 0; margin-top: 8px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 8px; box-shadow: 0 4px 12px rgba(0,0,0,0.1); display: flex; flex-direction: column; min-width: 150px; overflow: hidden; z-index: 100; }
.dropdown-item { padding: 10px 16px; text-align: left; background: none; border: none; font-size: 0.95rem; cursor: pointer; color: var(--color-text); width: 100%; }
.dropdown-item:hover { background: var(--color-bg); }
.text-danger { color: #dc3545; }
.user-profile-badge { cursor: pointer; }

/* ---- Menu pod awatarem (desktop: menu konta; telefon: cała nawigacja) ---- */
.dropdown-menu { min-width: 200px; }
.dropdown-header { padding: 12px 16px 10px; border-bottom: 1px solid var(--color-border); display: flex; flex-direction: column; gap: 2px; }
.dropdown-header-label { font-size: 0.78rem; color: var(--color-muted); }
.dropdown-header-email { font-size: 0.92rem; font-weight: 600; color: var(--color-text); overflow-wrap: anywhere; }
.dropdown-nav { display: flex; flex-direction: column; }
a.dropdown-item { display: block; text-decoration: none; }
.dropdown-item.is-active { color: var(--color-primary); font-weight: 600; background: var(--color-bg); }
.dropdown-sep { height: 1px; background: var(--color-border); margin: 4px 0; }
.dropdown-item-signin { color: var(--color-primary); font-weight: 600; }

.topbar[data-auth="out"] .menu-auth-in,
.topbar[data-auth="in"] .menu-auth-out { display: none; }

@media (min-width: 641px) {
  .menu-mobile { display: none !important; }
  /* Na desktopie awatar jest tylko dla zalogowanych (niezalogowany ma przycisk "Zaloguj się"). */
  .topbar[data-auth="out"] .dropdown-container { display: none; }
}

/* Sesja nauki na telefonie: nagłówek nie jest przyklejony, a strona jest
   przewinięta do paska "Zakończ sesję" (js/viewUtils.js: scrollForView).
   min-height gwarantuje, że to przewinięcie jest możliwe nawet przy krótkiej
   karcie. */
@media (max-width: 640px) {
  html.is-studying { scroll-padding-top: 0; }
  html.is-studying .topbar { position: static; }
  html.is-studying .view.is-active { min-height: 100vh; min-height: 100dvh; }
}

@media (max-width: 640px) {
  .menu-desktop { display: none !important; }
  .topbar-nav,
  #btn-header-signin,
  #btn-header-settings-link { display: none !important; }
  .topbar-right { flex-shrink: 0; }
  .user-profile-badge { width: 40px; height: 40px; }
  .dropdown-menu {
    width: min(300px, calc(100vw - 24px));
    max-height: calc(100vh - 90px);
    overflow-y: auto;
    border-radius: 14px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
  }
  .dropdown-item { padding: 13px 18px; font-size: 1rem; min-height: 44px; }
}

/* ================= Shared — level pill ================= */

.level-pill {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
}

/* ================= Custom Flashcards ================= */

.btn-sm {
  padding: 4px 10px;
  font-size: 0.8rem;
}

/* Category grid */
.custom-categories-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.category-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.2rem;
  cursor: pointer;
  transition: box-shadow 0.15s, transform 0.15s;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.category-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.category-card-name {
  font-weight: 600;
  font-size: 1.05rem;
}

.category-card-count {
  color: var(--color-muted);
  font-size: 0.85rem;
}

.category-card-progress {
  height: 4px;
  border-radius: 2px;
  background: var(--color-border);
  overflow: hidden;
}

.category-card-progress-bar {
  height: 100%;
  background: var(--box-5);
  transition: width 0.3s;
}

.category-empty-hint {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--color-muted);
  padding: 2rem 1rem;
}

.category-card-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.25rem;
  flex-wrap: wrap;
}

.category-card-study-btn {
  align-self: flex-start;
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: #fff;
  padding: 6px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: opacity 0.15s, background-color 0.15s;
}

.category-card-study-btn:hover:not(:disabled) {
  opacity: 0.9;
}

.category-card-study-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.category-card-play-btn {
  align-self: flex-start;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-primary);
  padding: 6px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
}

.category-card-play-btn:hover:not(:disabled) {
  background: var(--color-primary);
  color: #fff;
}

.category-card-play-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Folder auto-playback ("reminder" mode) */
.playback-settings {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.playback-settings label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.8rem;
  color: var(--color-muted);
}

.playback-settings select {
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.9rem;
}

.playback-loop-toggle {
  flex-direction: row !important;
  align-items: center;
  gap: 0.4rem !important;
}

.playback-controls {
  width: 100%;
  max-width: 480px;
  display: flex;
  gap: 12px;
  align-items: center;
}

.playback-controls .btn-wide {
  flex: 2;
}

.playback-controls .btn-secondary {
  flex: 1;
  white-space: nowrap;
}

/* Cards view header */
.custom-cards-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.custom-cards-header h2 {
  flex: 1;
  margin: 0;
}

.custom-cards-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Category dashboard panel (stats & study actions within a set) */
.category-dashboard-panel {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.category-dashboard-panel .boxes-panel {
  margin-top: 1rem;
}

.category-dashboard-panel .session-actions {
  margin-top: 1rem;
}

.custom-cards-manage-header {
  margin-bottom: 1rem;
}

.custom-cards-manage-header h2 {
  font-size: 1.25rem;
  margin: 0;
}

/* Custom cards search */
.custom-cards-search-wrap {
  margin-bottom: 1rem;
}

#custom-cards-search {
  width: 100%;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.95rem;
}

#custom-cards-search:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: -1px;
}

/* Add card form */
.custom-add-card-form {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.custom-add-card-form input {
  flex: 1;
  min-width: 140px;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.95rem;
}

.custom-add-card-form input:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: -1px;
}

.custom-add-card-form input.input-duplicate {
  border-color: var(--color-danger);
  background: color-mix(in srgb, var(--color-danger) 15%, var(--color-surface));
}

.custom-add-card-form input.input-duplicate:focus {
  outline-color: var(--color-danger);
}

.custom-cards-table tr.is-duplicate-row {
  background: color-mix(in srgb, var(--color-danger) 12%, var(--color-surface));
}

/* Cards table tweaks */
.custom-cards-table .card-action-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  color: var(--color-muted);
  font-size: 0.85rem;
}

.custom-cards-table .card-action-btn:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

.custom-cards-table .card-action-btn.card-action-delete:hover {
  color: var(--color-danger);
}

/* Edit inline inputs in table */
.custom-cards-table .card-edit-input {
  width: 100%;
  padding: 4px 8px;
  border: 1px solid var(--color-primary);
  border-radius: 6px;
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.9rem;
}

.custom-cards-table .card-edit-actions {
  display: flex;
  gap: 4px;
}

/* Bulk import modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.modal-dialog {
  position: relative;
  z-index: 1;
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.28);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  width: 100%;
}

.bulk-modal-dialog {
  max-width: 680px;
  max-height: min(90vh, 760px);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  flex-shrink: 0;
}

.modal-header h2 {
  margin: 0;
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--color-text);
}

.modal-close-btn {
  background: none;
  border: none;
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  color: var(--color-muted);
  padding: 6px 10px;
  border-radius: 6px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.modal-close-btn:hover {
  color: var(--color-text);
  background-color: var(--color-border);
}

.bulk-step {
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
}

.bulk-instruction {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-muted);
  line-height: 1.45;
}

.bulk-instruction strong {
  color: var(--color-text);
}

#bulk-import-textarea {
  width: 100%;
  min-height: 180px;
  max-height: 380px;
  padding: 12px 14px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.9rem;
  line-height: 1.45;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg);
  color: var(--color-text);
  resize: vertical;
  box-sizing: border-box;
}

#bulk-import-textarea:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: -1px;
  border-color: var(--color-primary);
}

.modal-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-top: auto;
  padding-top: 6px;
}

.bulk-summary-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.bulk-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.2;
}

.bulk-pill-valid {
  background: color-mix(in srgb, var(--color-success) 14%, var(--color-surface));
  color: var(--color-success);
  border: 1px solid color-mix(in srgb, var(--color-success) 30%, transparent);
}

.bulk-pill-rejected {
  background: color-mix(in srgb, var(--color-danger) 14%, var(--color-surface));
  color: var(--color-danger);
  border: 1px solid color-mix(in srgb, var(--color-danger) 30%, transparent);
}

.bulk-delimiter-hint {
  font-size: 0.82rem;
  color: var(--color-muted);
  margin-left: auto;
}

.bulk-preview-container {
  max-height: 360px;
  overflow-y: auto;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg);
  flex: 1;
  min-height: 120px;
}

.bulk-preview-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--color-border);
}

.bulk-item,
.bulk-row-valid,
.bulk-row-rejected {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  font-size: 0.88rem;
  background: var(--color-surface);
  line-height: 1.35;
}

.bulk-item-valid,
.bulk-row-valid {
  border-left: 3px solid var(--color-success);
}

.bulk-item-valid .bulk-status-icon,
.bulk-row-valid .bulk-status-icon {
  color: var(--color-success);
  font-weight: 700;
  width: 14px;
  text-align: center;
  flex-shrink: 0;
}

.bulk-item-rejected,
.bulk-row-rejected {
  border-left: 3px solid var(--color-danger);
  opacity: 0.9;
}

.bulk-item-rejected .bulk-status-icon,
.bulk-row-rejected .bulk-status-icon {
  color: var(--color-danger);
  font-weight: 700;
  width: 14px;
  text-align: center;
  flex-shrink: 0;
}

.bulk-col-front {
  font-weight: 600;
  color: var(--color-text);
  word-break: break-word;
}

.bulk-col-arrow {
  color: var(--color-muted);
  font-size: 0.82rem;
  user-select: none;
  flex-shrink: 0;
}

.bulk-col-back {
  color: var(--color-text);
  word-break: break-word;
}

.bulk-reason-badge {
  margin-left: auto;
  font-size: 0.74rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 4px;
  background: color-mix(in srgb, var(--color-danger) 15%, var(--color-surface));
  color: var(--color-danger);
  border: 1px solid color-mix(in srgb, var(--color-danger) 30%, transparent);
  white-space: nowrap;
  flex-shrink: 0;
}

@media (max-width: 600px) {
  .bulk-modal-dialog {
    max-height: 94vh;
    margin: 4px;
  }

  .bulk-step {
    padding: 12px 14px;
    gap: 10px;
  }

  .modal-header {
    padding: 10px 14px;
  }

  .bulk-summary-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .bulk-delimiter-hint {
    margin-left: 0;
  }

  .modal-actions {
    flex-direction: column-reverse;
    width: 100%;
  }

  .modal-actions button {
    width: 100%;
  }

  .bulk-item,
  .bulk-row-valid,
  .bulk-row-rejected {
    flex-wrap: wrap;
    gap: 6px;
    font-size: 0.84rem;
  }

  .bulk-reason-badge {
    margin-left: 0;
    width: 100%;
    text-align: left;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ================= SEO Landing Page (/) ================= */

#app:has(.landing-page) {
  max-width: 1080px;
  padding: 24px 20px 64px;
}

.landing-page {
  display: flex;
  flex-direction: column;
  gap: 56px;
  width: 100%;
}

/* Hero Section */
.landing-hero {
  background: linear-gradient(180deg, color-mix(in srgb, var(--color-primary) 9%, var(--color-surface)) 0%, var(--color-surface) 100%);
  border: 1px solid color-mix(in srgb, var(--color-primary) 22%, var(--color-border));
  border-radius: var(--radius);
  padding: 48px 32px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.landing-hero-content {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.landing-hero-title,
.landing-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.25;
  margin: 0 0 18px 0;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.landing-hero-lead,
.landing-lead {
  font-size: 1.15rem;
  line-height: 1.65;
  color: var(--color-muted);
  margin: 0 0 32px 0;
  max-width: 760px;
}

.landing-cta-group {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 36px;
  width: 100%;
}

.landing-cta-primary {
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
  font-size: 1.05rem;
  padding: 13px 28px;
  border-radius: 999px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
  box-shadow: 0 4px 14px rgba(67, 97, 238, 0.3);
}

.landing-cta-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(67, 97, 238, 0.4);
}

.landing-cta-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  font-weight: 600;
  font-size: 1.05rem;
  padding: 13px 26px;
  border-radius: 999px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--color-border);
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
}

.landing-cta-secondary:hover {
  background: color-mix(in srgb, var(--color-primary) 8%, var(--color-surface));
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

.landing-badges,
.landing-stats-pills {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  width: 100%;
  margin-top: 8px;
}

.landing-badge-item,
.landing-pill {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
}

.landing-badge-val {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
}

.landing-badge-lbl {
  font-size: 0.85rem;
  color: var(--color-muted);
  text-align: center;
  line-height: 1.35;
}

/* Sections Common Header & Structure */
.landing-section {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.landing-section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto;
}

.landing-section-header h2,
.landing-section-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--color-text);
  margin: 0 0 12px 0;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.landing-section-header p,
.landing-section-desc {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--color-muted);
  margin: 0;
}

.landing-section-footer,
.landing-section-cta {
  text-align: center;
  margin-top: 8px;
}

/* CEFR Grammar Cards Grid */
.landing-levels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 22px;
}

.landing-level-card {
  --level-color: var(--color-primary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--level-color);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.landing-level-card[data-level="a1"] { --level-color: #10b981; }
.landing-level-card[data-level="a2"] { --level-color: #06b6d4; }
.landing-level-card[data-level="b1"] { --level-color: #3b82f6; }
.landing-level-card[data-level="b2"] { --level-color: #6366f1; }
.landing-level-card[data-level="c1"] { --level-color: #a855f7; }
.landing-level-card[data-level="c2"] { --level-color: #f43f5e; }

.landing-level-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  border-color: color-mix(in srgb, var(--level-color) 45%, var(--color-border));
}

.landing-level-card-header,
.landing-level-header {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.landing-level-badge {
  background: var(--level-color);
  color: #fff;
  font-weight: 700;
  font-size: 0.82rem;
  padding: 3px 9px;
  border-radius: 999px;
  letter-spacing: 0.03em;
}

.landing-level-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
  flex: 1;
}

.landing-level-count {
  font-size: 0.8rem;
  color: var(--color-muted);
  background: color-mix(in srgb, var(--color-muted) 12%, var(--color-surface));
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
}

.landing-level-desc {
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--color-muted);
  margin: 0;
}

.landing-topic-links {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--color-border);
}

.landing-topic-links-title {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-muted);
  margin-bottom: 8px;
}

.landing-topic-list,
.landing-topics-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.landing-topic-list li,
.landing-topic-item {
  margin: 0;
  padding: 0;
}

.landing-topic-list a {
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 8px;
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
}

.landing-topic-list a:hover {
  background: color-mix(in srgb, var(--level-color) 10%, var(--color-surface));
  color: var(--level-color);
  text-decoration: underline;
}

.landing-topic-icon {
  font-size: 0.95rem;
  flex-shrink: 0;
}

.landing-topic-title {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.landing-level-footer {
  margin-top: 6px;
  text-align: right;
}

.landing-level-more,
.landing-level-all-link {
  color: var(--level-color);
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.landing-level-more:hover,
.landing-level-all-link:hover {
  text-decoration: underline;
}

/* Vocabulary & Leitner SRS Section */
.landing-method-grid,
.landing-modes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.landing-method-card,
.landing-mode-card,
.landing-leitner-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
}

.landing-method-card h3,
.landing-mode-card h3,
.landing-leitner-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
  line-height: 1.35;
}

.landing-method-card p,
.landing-mode-card p,
.landing-leitner-card p {
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--color-muted);
  margin: 0;
}

.landing-leitner-steps {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.landing-leitner-step {
  flex: 1;
  min-width: 90px;
  padding: 10px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--color-primary) 8%, var(--color-surface));
  border: 1px solid var(--color-border);
  text-align: center;
}

/* Features / E-E-A-T Section */
.landing-features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.landing-feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
}

.landing-feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
  line-height: 1.35;
}

.landing-feature-card p {
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--color-muted);
  margin: 0;
}

/* FAQ Section */
.landing-faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 820px;
  margin: 0 auto;
  width: 100%;
}

.landing-faq-item,
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.landing-faq-item[open],
.faq-item[open] {
  border-color: color-mix(in srgb, var(--color-primary) 40%, var(--color-border));
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
}

.landing-faq-item summary,
.landing-faq-question {
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--color-text);
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  gap: 12px;
  transition: background 0.15s;
}

.landing-faq-item summary::-webkit-details-marker,
.landing-faq-question::-webkit-details-marker {
  display: none;
}

.landing-faq-item summary::after,
.landing-faq-question::after {
  content: "+";
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--color-muted);
  transition: transform 0.2s;
  line-height: 1;
}

.landing-faq-item[open] summary::after,
.landing-faq-question[open]::after {
  content: "−";
  transform: rotate(180deg);
  color: var(--color-primary);
}

.landing-faq-item summary:hover,
.landing-faq-question:hover {
  background: color-mix(in srgb, var(--color-primary) 4%, var(--color-surface));
}

.landing-faq-item .faq-item-content,
.landing-faq-answer {
  padding: 0 20px 18px 20px;
  color: var(--color-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  border-top: 1px solid color-mix(in srgb, var(--color-border) 60%, transparent);
  margin-top: 2px;
  padding-top: 14px;
}

.landing-faq-item .faq-item-content p,
.landing-faq-answer p {
  margin: 0;
}

/* Final CTA Section */
.landing-final-cta {
  background: linear-gradient(135deg, color-mix(in srgb, var(--color-primary) 12%, var(--color-surface)) 0%, color-mix(in srgb, var(--color-primary) 4%, var(--color-surface)) 100%);
  border: 1px solid color-mix(in srgb, var(--color-primary) 28%, var(--color-border));
  border-radius: var(--radius);
  padding: 48px 32px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.landing-final-cta-content {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.landing-final-cta-content h2 {
  font-size: 2.0rem;
  font-weight: 800;
  color: var(--color-text);
  margin: 0 0 14px 0;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.landing-final-cta-content p {
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--color-muted);
  margin: 0 0 28px 0;
}

/* Responsive (Mobile < 768px) */
@media (max-width: 768px) {
  #app:has(.landing-page) {
    padding: 16px 14px 48px;
  }

  .landing-page {
    gap: 40px;
  }

  .landing-hero {
    padding: 30px 16px;
  }

  .landing-hero-title,
  .landing-title {
    font-size: 1.6rem;
  }

  .landing-hero-lead,
  .landing-lead {
    font-size: 0.98rem;
    margin-bottom: 24px;
  }

  .landing-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 10px;
  }

  .landing-cta-primary,
  .landing-cta-secondary {
    width: 100%;
    box-sizing: border-box;
    text-align: center;
    justify-content: center;
    font-size: 0.98rem;
    padding: 12px 18px;
  }

  .landing-badges,
  .landing-stats-pills {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .landing-badge-item,
  .landing-pill {
    padding: 12px 8px;
  }

  .landing-badge-val {
    font-size: 1.25rem;
  }

  .landing-badge-lbl {
    font-size: 0.78rem;
  }

  .landing-section {
    gap: 22px;
  }

  .landing-section-header h2,
  .landing-section-title {
    font-size: 1.38rem;
  }

  .landing-section-header p,
  .landing-section-desc {
    font-size: 0.94rem;
  }

  .landing-levels-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .landing-method-grid,
  .landing-modes-grid,
  .landing-features-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .landing-final-cta {
    padding: 30px 16px;
  }

  .landing-final-cta-content h2 {
    font-size: 1.38rem;
  }

  .landing-final-cta-content p {
    font-size: 0.94rem;
  }
}

/* =============================================================================
   Landing Steps & Site Footer (Plan Naprawczy SEO)
   ============================================================================= */

.landing-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  width: 100%;
}

.landing-step {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.landing-step:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--color-primary) 40%, var(--color-border));
}

.landing-step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #ffffff;
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.landing-step h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 8px 0;
  color: var(--color-text);
}

.landing-step p {
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--color-muted);
  margin: 0;
}

/* Site Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  width: 100%;
}

.footer-container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 36px 20px 20px;
  box-sizing: border-box;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr 1fr;
  gap: 28px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col-about {
  max-width: 320px;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
}

.footer-logo-svg {
  display: block;
  height: 32px;
  width: auto;
  color: var(--color-text);
}

.footer-heading {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.footer-about-text,
.footer-meta-text {
  font-size: 0.86rem;
  line-height: 1.55;
  color: var(--color-muted);
  margin: 0;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links li {
  margin: 0;
}

.footer-links a {
  font-size: 0.88rem;
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.footer-bottom {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.82rem;
  color: var(--color-muted);
}

.footer-bottom p {
  margin: 0;
}

/* Footer pills (brand column badges) */
.footer-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.footer-pill {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
  background: var(--color-primary);
  color: #fff;
  opacity: 0.85;
  letter-spacing: 0.01em;
}

/* CEFR level pill badges in grammar column */
.footer-level-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 18px;
  padding: 0 4px;
  border-radius: 4px;
  font-size: 0.65rem;
  font-weight: 700;
  background: var(--color-primary);
  color: #fff;
  margin-right: 6px;
  flex-shrink: 0;
}

.footer-levels-list a {
  display: flex;
  align-items: center;
  min-height: 28px;
}

/* Privacy link in data column */
.footer-privacy-link {
  margin-top: 4px;
}

.footer-privacy-link a {
  color: var(--color-primary) !important;
  font-weight: 600;
}

/* Footer bottom bar */
.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  text-align: left;
}

.footer-bottom-links {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
}

.footer-bottom-links a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer-bottom-links a:hover {
  color: var(--color-primary);
}

.footer-dot {
  color: var(--color-border);
  user-select: none;
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .landing-steps {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 22px;
  }
}

/* ==========================================================================
   Auth Modal & Backdrop
   ========================================================================== */
.auth-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
  opacity: 1;
  transition: opacity 0.2s ease;
}

.auth-modal-backdrop.is-hidden {
  display: none !important;
}

.auth-modal {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 440px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.25);
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: authModalFadeIn 0.2s ease-out;
}

@keyframes authModalFadeIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.auth-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--color-border);
}

.auth-modal-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-text);
}

.auth-modal-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  padding: 0;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.auth-modal-close:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

.auth-modal-tabs {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  padding: 0 16px;
  gap: 8px;
  overflow-x: auto;
}

.auth-tab-btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 12px 14px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-muted);
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}

.auth-tab-btn:hover {
  color: var(--color-text);
}

.auth-tab-btn.is-active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

.auth-modal-body {
  padding: 24px;
}

.auth-modal-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.auth-modal-form.is-hidden {
  display: none !important;
}

.auth-modal-form .form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
}

.auth-modal-form label {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text);
}

.auth-modal-form input[type="email"],
.auth-modal-form input[type="password"] {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.98rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.auth-modal-form input[type="email"]:focus,
.auth-modal-form input[type="password"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
}

.auth-error-message {
  color: var(--color-danger);
  background: rgba(214, 69, 80, 0.1);
  border: 1px solid var(--color-danger);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.88rem;
  line-height: 1.4;
  margin-bottom: 4px;
}

.auth-error-message.is-hidden {
  display: none !important;
}

.auth-success-message {
  color: #2a9d8f;
  background: rgba(42, 157, 143, 0.12);
  border: 1px solid #2a9d8f;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.88rem;
  line-height: 1.4;
  margin-bottom: 12px;
}

.auth-success-message.is-hidden {
  display: none !important;
}

.auth-modal-note {
  margin: 0 0 4px;
  font-size: 0.88rem;
  color: var(--color-muted);
  line-height: 1.45;
}

@media (max-width: 480px) {
  .auth-modal-header {
    padding: 14px 18px;
  }
  .auth-modal-body {
    padding: 18px;
  }
  .auth-tab-btn {
    padding: 10px 8px;
    font-size: 0.88rem;
  }
}




/* ================= Strony błędów (404/500) ================= */
.error-page { max-width: 560px; margin: 48px auto; padding: 0 16px; text-align: center; }
.error-page-code { font-size: 3.5rem; font-weight: 800; color: var(--color-primary); margin: 0; line-height: 1; }
.error-page h1 { font-size: 1.5rem; margin: 12px 0 8px; }
.error-page-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 20px; }

/* ================= Tryb offline ================= */
.offline-banner {
  background: #fff4d6;
  color: #6b4e00;
  border-bottom: 1px solid #f0d58c;
  padding: 8px 16px;
  font-size: 0.88rem;
  text-align: center;
}
@media (prefers-color-scheme: dark) {
  .offline-banner { background: #3a3014; color: #f5dd9a; border-bottom-color: #5c4b1d; }
}
.update-toast {
  position: fixed;
  left: 50%;
  bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 12px;
  width: max-content;
  max-width: calc(100vw - 32px);
  padding: 10px 10px 10px 16px;
  border-radius: 14px;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
  font-size: 0.92rem;
}
.offline-status { font-weight: 600; }

/* ---------- Ustawienia: kiedy lektor czyta słowo ---------- */
.speak-triggers {
  display: grid;
  gap: 12px;
}

.speak-category {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 12px 14px 2px;
  margin: 0;
  min-width: 0;
}

.speak-category-toggle,
.speak-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
}

/* float: legenda jako zwykły nagłówek karty, a nie "wcięcie" w ramce */
.speak-category legend {
  float: left;
  width: 100%;
  padding: 0 0 10px;
  font-weight: 600;
}

.speak-category legend + * {
  clear: both;
}

.speak-category-toggle {
  margin: 0;
}

.speak-option {
  padding: 10px 0;
  border-top: 1px solid var(--color-border);
}

.speak-option .hint {
  display: inline;
}

/* Przełącznik w stylu iOS na natywnym checkboxie (zachowuje klawiaturę,
   :checked, :indeterminate i czytniki ekranu). Stan pośredni = część opcji
   kategorii włączona: suwak na środku, jaśniejsza zieleń. */
.ios-toggle {
  --toggle-on: #34c759;
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  flex-shrink: 0;
  width: 51px;
  height: 31px;
  margin: 0;
  border-radius: 999px;
  background: #e9e9eb;
  box-shadow: inset 0 0 0 2px rgba(0, 0, 0, 0.04);
  cursor: pointer;
  transition: background-color 0.25s ease;
}

.ios-toggle::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 27px;
  height: 27px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.15), 0 1px 1px rgba(0, 0, 0, 0.16);
  transition: transform 0.25s ease;
}

.ios-toggle:checked {
  background: var(--toggle-on);
}

.ios-toggle:checked::before {
  transform: translateX(20px);
}

.ios-toggle:indeterminate {
  background: #a6e3b6;
}

.ios-toggle:indeterminate::before {
  transform: translateX(10px);
}

.ios-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

@media (prefers-color-scheme: dark) {
  .ios-toggle {
    background: #39393d;
  }
  .ios-toggle:checked {
    --toggle-on: #30d158;
  }
  .ios-toggle:indeterminate {
    background: #1f6b34;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ios-toggle,
  .ios-toggle::before {
    transition: none;
  }
}

.speak-bulk .btn {
  padding: 8px 14px;
  font-size: 0.88rem;
}

/* Skip link — invisible until focused with the keyboard (first Tab on the page). */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  z-index: 1000;
  padding: 8px 16px;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 0;
}