/* ============================================================
   Wordlock — Style Sheet
   Aesthetic: Editorial / Papier — warm off-white, deep ink,
   terracotta accents, Fraunces serif + DM Mono
   ============================================================ */

/* ---- VARIABLES ---- */
:root {
  --bg:        #f5f0e8;
  --bg-alt:    #ede8de;
  --bg-card:   #faf7f2;
  --ink:       #1a1510;
  --ink-2:     #4a4035;
  --ink-3:     #8a7d6e;
  --accent:    #c0502a;
  --accent-2:  #e8855e;
  --accent-light: #f2d4c8;
  --green:     #3a7a5a;
  --green-light: #c8e8d8;
  --red:       #b83030;
  --red-light: #f0d0d0;
  --border:    #d8d0c4;
  --shadow:    rgba(26,21,16,.08);
  --shadow-md: rgba(26,21,16,.14);
  --sidebar-w: 260px;
  --radius:    10px;
  --radius-lg: 16px;
  --font-display: 'Fraunces', Georgia, serif;
  --font-body:    'Outfit', sans-serif;
  --font-mono:    'DM Mono', monospace;
  --transition:   .2s cubic-bezier(.4,0,.2,1);
}

/* ---- RESET ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
}

/* ---- SCROLLBAR ---- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
  width: var(--sidebar-w);
  min-height: 100vh;
  background: var(--ink);
  color: #f5f0e8;
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0; top: 0;
  z-index: 100;
  transition: transform var(--transition);
  padding-bottom: 2rem;
}
.sidebar.collapsed { transform: translateX(calc(-1 * var(--sidebar-w))); }

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 1.25rem 1.25rem;
  border-bottom: 1px solid rgba(245,240,232,.1);
}
.logo { display: flex; align-items: center; gap: .6rem; }
.logo-mark {
  width: 32px; height: 32px;
  background: var(--accent);
  border-radius: 8px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  display: grid; place-items: center;
  color: #fff;
  flex-shrink: 0;
}
.logo-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 300;
  letter-spacing: .02em;
}

.sidebar-section { padding: 1.25rem 1rem 0; }
.sidebar-label {
  font-size: .65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: rgba(245,240,232,.4);
  margin-bottom: .75rem;
  padding: 0 .25rem;
}

.list-nav { list-style: none; display: flex; flex-direction: column; gap: .2rem; }
.list-nav-item {
  display: flex;
  align-items: center;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  transition: background var(--transition);
}
.list-nav-item:hover { background: rgba(245,240,232,.08); }
.list-nav-item.active { background: rgba(192,80,42,.25); }
.list-nav-btn {
  flex: 1;
  text-align: left;
  background: none; border: none;
  color: rgba(245,240,232,.85);
  padding: .6rem .75rem;
  font-family: var(--font-body);
  font-size: .9rem;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.list-nav-item.active .list-nav-btn { color: #fff; font-weight: 500; }
.list-nav-delete {
  background: none; border: none;
  color: rgba(245,240,232,.3);
  padding: .5rem .6rem;
  cursor: pointer;
  font-size: 1rem;
  transition: color var(--transition);
  flex-shrink: 0;
}
.list-nav-delete:hover { color: var(--accent-2); }

.btn-new-list {
  display: flex; align-items: center; gap: .5rem;
  width: 100%;
  background: rgba(192,80,42,.2);
  border: 1px dashed rgba(192,80,42,.5);
  color: var(--accent-2);
  border-radius: 8px;
  padding: .6rem .75rem;
  font-family: var(--font-body);
  font-size: .9rem;
  cursor: pointer;
  margin-top: .75rem;
  transition: background var(--transition), border-color var(--transition);
}
.btn-new-list:hover { background: rgba(192,80,42,.3); border-color: var(--accent-2); }
.btn-new-list svg { width: 14px; height: 14px; stroke: currentColor; stroke-width: 2.5; fill: none; }

/* ---- SIDEBAR FOOTER (account) ---- */
.sidebar-footer {
  margin-top: auto;
  padding: 1rem 1.25rem;
  border-top: 1px solid rgba(245,240,232,.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
}
.sidebar-user {
  font-size: .8rem;
  color: rgba(245,240,232,.6);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.btn-logout {
  background: none;
  border: 1px solid rgba(245,240,232,.2);
  color: rgba(245,240,232,.7);
  border-radius: 8px;
  padding: .35rem .7rem;
  font-family: var(--font-body);
  font-size: .78rem;
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition);
}
.btn-logout:hover { background: rgba(192,80,42,.3); color: #fff; }

/* ============================================================
   MAIN
   ============================================================ */
.main {
  flex: 1;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left var(--transition);
}
.main.expanded { margin-left: 0; }

/* ---- TOP BAR ---- */
.topbar {
  height: 60px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0 1.5rem;
  position: sticky; top: 0; z-index: 50;
}
.page-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 300;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topbar-actions { display: flex; gap: .5rem; }

/* ---- CONTENT ---- */
.content { flex: 1; padding: 2rem 2.5rem; max-width: 960px; }

.view { display: none; }
.view.active { display: block; animation: fadeUp .3s ease; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   HOME VIEW
   ============================================================ */
.hero {
  padding: 3rem 0 2.5rem;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 300;
  font-style: italic;
  line-height: 1.15;
  margin-bottom: .75rem;
}
.hero-sub {
  color: var(--ink-2);
  font-size: 1.05rem;
  font-weight: 300;
  margin-bottom: 1.75rem;
  max-width: 480px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin-top: 2.5rem;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  transition: transform var(--transition), box-shadow var(--transition);
}
.feature-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px var(--shadow-md); }
.feature-icon { font-size: 1.75rem; margin-bottom: .75rem; }
.feature-card h3 { font-size: .95rem; font-weight: 600; margin-bottom: .4rem; }
.feature-card p { font-size: .85rem; color: var(--ink-3); line-height: 1.5; }

/* ============================================================
   EDITOR VIEW
   ============================================================ */
.editor-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: .75rem;
  margin-bottom: 1.25rem;
}
.editor-toolbar-left, .editor-toolbar-right { display: flex; gap: .5rem; flex-wrap: wrap; }

.editor-meta { margin-bottom: 1.25rem; }
.list-name-input {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 300;
  font-style: italic;
  background: transparent;
  border: none;
  border-bottom: 2px solid var(--border);
  width: 100%;
  padding: .4rem 0;
  color: var(--ink);
  outline: none;
  transition: border-color var(--transition);
}
.list-name-input:focus { border-color: var(--accent); }

.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.terms-table { width: 100%; border-collapse: collapse; }
.terms-table th {
  background: var(--bg-alt);
  padding: .75rem 1rem;
  text-align: left;
  font-size: .7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--ink-3);
  border-bottom: 1px solid var(--border);
}
.col-num { width: 44px; text-align: center; }
.col-img { width: 64px; text-align: center; }
.col-actions { width: 48px; }

.terms-table td { padding: 0; border-bottom: 1px solid var(--border); vertical-align: middle; }
.terms-table tr:last-child td { border-bottom: none; }
.terms-table tr { transition: background var(--transition); }
.terms-table tr:hover td { background: var(--bg-alt); }

.td-num {
  text-align: center;
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--ink-3);
  padding: .75rem;
}
.cell-input {
  width: 100%;
  background: transparent;
  border: none;
  padding: .75rem 1rem;
  font-family: var(--font-body);
  font-size: .95rem;
  color: var(--ink);
  outline: none;
  transition: background var(--transition);
}
.cell-input:focus { background: var(--accent-light); }
.td-actions { text-align: center; padding: 0 .5rem; }
.btn-delete-row {
  background: none; border: none;
  color: var(--ink-3);
  cursor: pointer;
  font-size: 1.1rem;
  padding: .25rem;
  border-radius: 4px;
  transition: color var(--transition), background var(--transition);
  line-height: 1;
}
.btn-delete-row:hover { color: var(--red); background: var(--red-light); }

/* Mastered row highlight */
.terms-table tr.mastered-row td { background: var(--green-light) !important; }
.mastered-badge {
  font-size: .65rem;
  font-weight: 600;
  background: var(--border);
  color: var(--ink-3);
  border-radius: 99px;
  padding: .15rem .5rem;
  margin-left: .5rem;
  vertical-align: middle;
  cursor: pointer;
  border: none;
  display: inline-block;
  min-width: 1.4em;
  text-align: center;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}
.mastered-badge:hover { transform: scale(1.1); }
.mastered-badge.is-mastered { background: var(--green); color: #fff; }
.mastered-badge.is-mastered:hover { background: #2e6047; }
.mastered-badge:not(.is-mastered):hover { background: var(--accent-light); color: var(--accent); }

/* Term image thumbnail in editor */
.td-img { text-align: center; padding: .4rem; }
.term-thumb-wrap { position: relative; display: inline-flex; }
.term-thumb {
  width: 40px; height: 40px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--border);
  cursor: pointer;
  display: block;
}
.term-thumb-add {
  width: 40px; height: 40px;
  border-radius: 6px;
  border: 1.5px dashed var(--border);
  background: none;
  color: var(--ink-3);
  cursor: pointer;
  font-size: 1.1rem;
  display: grid; place-items: center;
  transition: border-color var(--transition), color var(--transition);
}
.term-thumb-add:hover { border-color: var(--accent); color: var(--accent); }
.term-thumb-remove {
  position: absolute;
  top: -6px; right: -6px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--red);
  color: #fff;
  border: none;
  font-size: .6rem;
  line-height: 1;
  cursor: pointer;
  display: grid; place-items: center;
}

.btn-add-row {
  display: flex; align-items: center; gap: .5rem;
  background: none;
  border: 1.5px dashed var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  width: 100%;
  padding: .75rem 1rem;
  font-family: var(--font-body);
  font-size: .9rem;
  color: var(--ink-3);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.btn-add-row:hover { background: var(--accent-light); color: var(--accent); }
.btn-add-row svg { width: 14px; height: 14px; stroke: currentColor; stroke-width: 2.5; fill: none; flex-shrink: 0; }

/* ============================================================
   STUDY SHARED
   ============================================================ */
.study-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: .75rem;
  margin-bottom: 1.5rem;
}
.study-options { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }

.progress-bar-wrap {
  display: flex; align-items: center; gap: .75rem;
  margin-bottom: 2rem;
}
.progress-bar-track {
  flex: 1;
  height: 8px;
  background: var(--bg-alt);
  border-radius: 99px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 100%);
  border-radius: 99px;
  transition: width .5s cubic-bezier(.4,0,.2,1);
  width: 0%;
}
.progress-text {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--ink-3);
  white-space: nowrap;
}

/* ============================================================
   FLASH CARD VIEW
   ============================================================ */
.flashcard-arena {
  perspective: 1200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 1.5rem;
}

.flashcard {
  width: 100%;
  max-width: 600px;
  height: 240px;
  cursor: pointer;
  position: relative;
}

/* Single visible face — content swaps on flip */
.flashcard-inner {
  width: 100%; height: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  box-shadow: 0 4px 24px var(--shadow);
  gap: .75rem;
  transition: background .3s, border-color .3s;
}
.flashcard.flipped .flashcard-inner {
  background: var(--ink);
  border-color: var(--ink);
}

/* front & back are both inside the same face; only one visible at a time */
.flashcard-front, .flashcard-back {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  width: 100%; height: 100%;
  padding: 2rem;
  transition: opacity .25s ease, transform .25s ease;
}
.flashcard-front {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}
.flashcard-back {
  opacity: 0;
  transform: scale(.95);
  pointer-events: none;
  color: #f5f0e8;
}
.flashcard.flipped .flashcard-front {
  opacity: 0;
  transform: scale(.95);
  pointer-events: none;
}
.flashcard.flipped .flashcard-back {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}
.card-badge {
  font-size: .65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--accent);
  background: var(--accent-light);
  padding: .2rem .65rem;
  border-radius: 99px;
}
.flashcard-back .card-badge {
  background: rgba(192,80,42,.3);
  color: var(--accent-2);
}
.card-content {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 3vw, 1.6rem);
  font-weight: 300;
  text-align: center;
  line-height: 1.4;
}
.card-image {
  max-width: 100%;
  max-height: 96px;
  border-radius: var(--radius);
  object-fit: cover;
}

.flip-hint {
  font-size: .75rem;
  color: var(--ink-3);
  margin-top: .75rem;
}

.flashcard-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  flex-wrap: wrap;
}
.btn-card {
  padding: .6rem 1.5rem;
  border-radius: var(--radius);
  border: none;
  font-family: var(--font-body);
  font-size: .9rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}
.btn-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px var(--shadow-md); }
.btn-wrong { background: var(--red-light); color: var(--red); }
.btn-correct { background: var(--green-light); color: var(--green); }
.btn-nav {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  font-size: 1.3rem;
  cursor: pointer;
  display: grid; place-items: center;
  transition: background var(--transition), border-color var(--transition);
  color: var(--ink);
}
.btn-nav:hover { background: var(--accent-light); border-color: var(--accent); }

/* ============================================================
   QUIZ VIEW
   ============================================================ */
.quiz-arena { max-width: 600px; margin: 0 auto; }
.quiz-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  box-shadow: 0 4px 24px var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.quiz-card .card-image { max-height: 140px; margin: 0 auto; }
.quiz-question {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3vw, 1.75rem);
  font-weight: 300;
  line-height: 1.4;
  text-align: center;
}
.quiz-input-wrap { display: flex; gap: .5rem; }
.quiz-input {
  flex: 1;
  padding: .7rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--bg);
  color: var(--ink);
  outline: none;
  transition: border-color var(--transition);
}
.quiz-input:focus { border-color: var(--accent); }
.quiz-input.correct { border-color: var(--green); background: var(--green-light); }
.quiz-input.wrong { border-color: var(--red); background: var(--red-light); }

.quiz-feedback {
  min-height: 1.5rem;
  font-size: .9rem;
  text-align: center;
  font-weight: 500;
  transition: color var(--transition);
}
.quiz-feedback.correct { color: var(--green); }
.quiz-feedback.wrong { color: var(--red); }

.quiz-completion { max-width: 600px; margin: 0 auto; }

/* ============================================================
   COMPLETION CARD
   ============================================================ */
.completion-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  box-shadow: 0 8px 32px var(--shadow-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  animation: fadeUp .4s ease;
}
.completion-icon { font-size: 3rem; }
.completion-card h3 { font-family: var(--font-display); font-size: 1.75rem; font-weight: 300; }
.completion-card p { color: var(--ink-2); max-width: 360px; }
.completion-actions { display: flex; gap: .75rem; flex-wrap: wrap; justify-content: center; margin-top: .5rem; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
  padding: .6rem 1.4rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: .9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  display: inline-flex; align-items: center; gap: .5rem;
}
.btn-primary:hover { background: #a8431f; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(192,80,42,.3); }

.btn-secondary {
  padding: .6rem 1.2rem;
  background: var(--bg-card);
  color: var(--ink);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: .9rem;
  font-weight: 400;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  display: inline-flex; align-items: center; gap: .5rem;
}
.btn-secondary:hover { background: var(--bg-alt); border-color: var(--ink-3); }

.btn-danger {
  padding: .6rem 1.2rem;
  background: var(--red-light);
  color: var(--red);
  border: 1.5px solid var(--red);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: .9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition);
}
.btn-danger:hover { background: var(--red); color: #fff; }

.btn-sm { padding: .45rem .9rem; font-size: .82rem; }

.btn-icon {
  background: none; border: none;
  cursor: pointer;
  padding: .4rem;
  border-radius: 6px;
  color: inherit;
  display: grid; place-items: center;
  transition: background var(--transition);
  flex-shrink: 0;
}
.btn-icon:hover { background: rgba(0,0,0,.06); }
.btn-icon svg {
  width: 18px; height: 18px;
  stroke: currentColor; stroke-width: 2; fill: none;
  stroke-linecap: round; stroke-linejoin: round;
}

/* ============================================================
   FORMS / MODALS
   ============================================================ */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(26,21,16,.5);
  backdrop-filter: blur(4px);
  display: none; place-items: center;
  z-index: 200;
  padding: 1rem;
}
.modal-overlay.open { display: grid; }

.modal {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  width: 100%; max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(26,21,16,.25);
  animation: modalIn .25s ease;
}
.modal-lg { max-width: 600px; }
.modal-sm { max-width: 360px; }

@keyframes modalIn {
  from { opacity: 0; transform: scale(.96) translateY(10px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-family: var(--font-display); font-weight: 600; font-size: 1.1rem; }

.modal-body { padding: 1.5rem; display: flex; flex-direction: column; gap: .75rem; }
.modal-footer {
  display: flex; gap: .75rem; justify-content: flex-end;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
}

.field-label {
  font-size: .8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--ink-3);
  margin-bottom: .25rem;
  display: block;
}
.field-input {
  width: 100%;
  padding: .65rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: .95rem;
  background: var(--bg);
  color: var(--ink);
  outline: none;
  transition: border-color var(--transition);
}
.field-input:focus { border-color: var(--accent); }
.field-short { width: auto; min-width: 120px; }

.field-textarea {
  width: 100%;
  padding: .75rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: .82rem;
  background: var(--bg);
  color: var(--ink);
  outline: none;
  resize: vertical;
  line-height: 1.6;
  transition: border-color var(--transition);
}
.field-textarea:focus { border-color: var(--accent); }

.field-row { display: flex; flex-direction: column; gap: .35rem; }

.radio-option {
  display: flex; align-items: flex-start; gap: .6rem;
  padding: .65rem .9rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  font-size: .9rem;
}
.radio-option:hover { border-color: var(--accent); background: var(--accent-light); }
.radio-option input[type=radio] { margin-top: .15rem; accent-color: var(--accent); flex-shrink: 0; }

.toggle-label {
  display: flex; align-items: center; gap: .5rem;
  font-size: .9rem;
  cursor: pointer;
  user-select: none;
}
.toggle-label input[type=checkbox] { accent-color: var(--accent); width: 16px; height: 16px; }

.import-file-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: .75rem;
}
.file-label {
  cursor: pointer;
  display: inline-flex; align-items: center; gap: .4rem;
}

.export-preview-wrap { margin-top: .5rem; }
.export-preview {
  background: var(--ink);
  color: #c8f0b8;
  font-family: var(--font-mono);
  font-size: .78rem;
  padding: .9rem 1rem;
  border-radius: var(--radius);
  max-height: 120px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ============================================================
   AUTH (login / signup)
   ============================================================ */
.auth-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  width: 100%;
  padding: 1.5rem;
}
.auth-wrap { width: 100%; display: flex; justify-content: center; }
.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  box-shadow: 0 8px 32px var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.auth-logo { justify-content: center; margin-bottom: .25rem; }
.auth-tabs {
  display: flex;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.auth-tab {
  flex: 1;
  padding: .6rem;
  background: var(--bg);
  border: none;
  font-family: var(--font-body);
  font-size: .85rem;
  font-weight: 500;
  color: var(--ink-3);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.auth-tab.active { background: var(--accent); color: #fff; }
.auth-form { display: flex; flex-direction: column; }
.auth-submit { width: 100%; justify-content: center; margin-top: 1rem; }
.auth-error { color: var(--red); font-size: .82rem; min-height: 1.1em; margin-top: .5rem; }
.auth-divider {
  display: flex; align-items: center; gap: .75rem;
  color: var(--ink-3); font-size: .78rem;
}
.auth-divider::before, .auth-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}
.auth-google { width: 100%; justify-content: center; text-decoration: none; }
.auth-switch { text-align: center; font-size: .85rem; color: var(--ink-2); }
.link-btn {
  background: none; border: none;
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
  font-size: inherit;
  font-family: inherit;
  padding: 0;
}
.link-btn:hover { text-decoration: underline; }

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* menuOpen always visible */
#menuOpen { display: grid; }

@media (max-width: 700px) {
  :root { --sidebar-w: 240px; }
  .sidebar { transform: translateX(calc(-1 * var(--sidebar-w))); }
  .sidebar.open { transform: translateX(0); }
  .main { margin-left: 0 !important; }
  .content { padding: 1.25rem; }
  .flashcard { height: 200px; }
  .quiz-card { padding: 1.5rem 1.25rem; }
  /* Overlay behind sidebar on mobile */
  .sidebar-overlay {
    display: block;
    position: fixed; inset: 0;
    background: rgba(26,21,16,.4);
    z-index: 99;
  }
}
@media (min-width: 701px) {
  .sidebar.collapsed { transform: translateX(calc(-1 * var(--sidebar-w))); }
  .main.expanded { margin-left: 0; }
}