/* ==========================================================================
   Manage views: flashcard list, quiz history, forms, delete confirms
   ========================================================================== */

.manage-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.manage-header .eyebrow { display: block; margin-bottom: 8px; }
.manage-header h1 { font-size: var(--step-3); }

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

/* Sort toggle — same visual language as the difficulty segmented control */
.sort-toggle {
  display: inline-flex;
  padding: 4px;
  background: var(--color-primary-soft);
  border-radius: var(--radius-md);
  gap: 4px;
}

.sort-toggle a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 10px;
  font-size: var(--step--1);
  font-weight: 700;
  color: var(--color-primary-dark);
  text-decoration: none;
  transition: background 0.15s var(--ease), color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}

.sort-toggle a.is-active {
  background: var(--color-bg-card-raised);
  color: var(--color-ink);
  box-shadow: 0 1px 2px rgba(43,38,33,0.08), 0 4px 10px -4px rgba(43,38,33,0.15);
}

/* Topic group sections */
.topic-group { margin-bottom: 40px; }
.topic-group:last-child { margin-bottom: 0; }

.topic-group-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--step-1);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

/* Topic overview tiles */
.topic-tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}

.topic-tile {
  position: relative;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}

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

.topic-tile-link { position: absolute; inset: 0; border-radius: inherit; }
.topic-tile-link:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

.topic-tile-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.topic-tile-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-1);
  line-height: 1.3;
}

.topic-tile-preview {
  font-size: var(--step--1);
  color: var(--color-ink-soft);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ==========================================================================
   Flashcard grid
   ========================================================================== */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 20px;
}

.flip-card {
  perspective: 1200px;
}

.flip-card-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.flip-card-label {
  display: block;
  cursor: pointer;
}

.flip-card-inner {
  position: relative;
  height: 240px;
  transition: transform 0.5s var(--ease);
  transform-style: preserve-3d;
}

.flip-card-input:checked ~ .flip-card-label .flip-card-inner {
  transform: rotateY(180deg);
}

.flip-card-input:focus-visible ~ .flip-card-label .flip-card-inner {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-md);
}

.flip-card-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  box-shadow: var(--shadow-card);
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.flip-card-front { justify-content: space-between; }

.flip-card-back {
  transform: rotateY(180deg);
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
}

.flip-card-topic { align-self: flex-start; }

.flip-card-front-text {
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 600;
  line-height: 1.3;
  margin-top: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.flip-card-hint {
  margin-top: auto;
  padding-top: 12px;
  font-size: var(--step--1);
  color: var(--color-ink-faint);
  font-style: italic;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.flip-card-hint::before { content: "Hint — "; font-style: normal; font-weight: 700; }

.flip-card-flip-hint {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
}

.flip-card-back-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}

.flip-card-explanation {
  font-size: var(--step--1);
  line-height: 1.55;
  color: var(--color-ink);
  overflow-y: auto;
}

.flip-card-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(75, 117, 102, 0.2);
}

/* Actions sit on the back face; stop the label click (flip) from firing
   when someone means to hit edit/delete instead */
.flip-card-actions a,
.flip-card-actions button {
  position: relative;
  z-index: 2;
}

/* ==========================================================================
   Quiz history list
   ========================================================================== */

.history-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.history-row {
  position: relative;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 18px 20px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}

.history-row:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card);
}

/* Stretched-link pattern: makes the whole row clickable without nesting
   an <a> inside another interactive element. The delete button below
   gets a higher z-index so it stays independently clickable on top. */
.history-row-link {
  position: absolute;
  inset: 0;
  z-index: 1;
  border-radius: inherit;
}

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

.history-row-main { flex: 1; min-width: 0; }

.history-row-topic {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-0);
  margin-bottom: 4px;
}

.history-row-date {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-ink-faint);
}

.history-row-score {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  min-width: 120px;
}

.history-score-fraction {
  font-size: var(--step--1);
  font-weight: 700;
}

.history-score-fraction .text-soft { font-weight: 500; }

.history-score-bar {
  width: 120px;
  height: 6px;
  border-radius: 999px;
  background: var(--color-error-soft);
  overflow: hidden;
  display: flex;
}

.history-score-bar-correct {
  background: var(--color-primary);
  height: 100%;
}

.history-row-actions {
  position: relative;
  z-index: 2;
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

/* ==========================================================================
   Empty states
   ========================================================================== */

.empty-state {
  text-align: center;
  padding: 64px 24px;
  border: 1.5px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
}

.empty-state-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 18px;
  color: var(--color-ink-faint);
}

.empty-state h3 { margin-bottom: 6px; }

.empty-state p {
  color: var(--color-ink-soft);
  font-size: var(--step--1);
  max-width: 340px;
  margin-inline: auto;
  margin-bottom: 22px;
}

/* ==========================================================================
   Forms (flashcard create/update)
   ========================================================================== */

.form-card {
  max-width: 560px;
  margin-inline: auto;
  padding: 36px;
}

.form-header {
  text-align: center;
  margin-bottom: 28px;
}

.form-header .eyebrow { display: block; margin-bottom: 10px; }

form .field + .field { margin-top: 20px; }

.field-hint {
  font-size: 12px;
  color: var(--color-ink-faint);
}

.field-error {
  font-size: 12px;
  color: var(--color-error);
  font-weight: 600;
}

.text-input,
.textarea-input {
  width: 100%;
  background: var(--color-bg-card-raised);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  font-family: var(--font-body);
  font-size: var(--step-0);
}

.textarea-input {
  min-height: 96px;
  resize: vertical;
  line-height: 1.5;
}

.text-input:focus-visible,
.textarea-input:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
  border-color: var(--color-primary);
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 28px;
}

/* ==========================================================================
   Delete confirmation
   ========================================================================== */

.confirm-card {
  max-width: 460px;
  margin-inline: auto;
  padding: 36px;
  text-align: center;
}

.confirm-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 18px;
  border-radius: 12px;
  background: var(--color-error-soft);
  color: var(--color-error);
  display: grid;
  place-items: center;
}

.confirm-icon svg { width: 22px; height: 22px; }

.confirm-preview {
  margin-block: 18px 24px;
  padding: 14px 16px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-0);
}

.confirm-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

@media (max-width: 560px) {
  .form-card, .confirm-card { padding: 24px; }
  .history-row { flex-wrap: wrap; }
  .history-row-score { align-items: flex-start; }
}