/* ========================================
   TPA Practice — Calm Learning Theme
   ======================================== */

:root {
  /* Calm palette */
  --color-primary: #4a7c6f;
  --color-primary-light: #6b9e8f;
  --color-primary-dark: #3a6359;
  --color-primary-bg: #eef5f2;

  --color-accent: #7c9885;
  --color-warm: #a8937c;
  --color-warm-light: #f5f0eb;

  --color-success: #5a9a6e;
  --color-success-bg: #edf7f0;
  --color-error: #c06060;
  --color-error-bg: #fdf0f0;
  --color-warning: #c4a24e;
  --color-warning-bg: #fdf8eb;

  --color-bg: #f7f9f8;
  --color-surface: #ffffff;
  --color-surface-hover: #f0f5f3;
  --color-border: #dde5e1;
  --color-border-light: #e8ede9;

  --color-text: #2c3e36;
  --color-text-light: #5a6b63;
  --color-text-muted: #8a9890;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --shadow-sm: 0 1px 3px rgba(44, 62, 54, 0.06);
  --shadow-md: 0 4px 12px rgba(44, 62, 54, 0.08);
  --shadow-lg: 0 8px 24px rgba(44, 62, 54, 0.1);

  --transition: 0.2s ease;
  --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

/* ---- Reset & Base ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-dark);
}

.hidden {
  display: none !important;
}

/* ---- Header ---- */
#app-header, #test-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border-light);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-primary);
}

.logo:hover {
  color: var(--color-primary-dark);
}

.logo-icon {
  font-size: 1.3rem;
}

#main-nav {
  display: flex;
  gap: 0.25rem;
}

.nav-link {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-light);
  transition: all var(--transition);
}

.nav-link:hover {
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

.nav-link.active {
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: var(--transition);
}

/* Test Header */
.test-header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.test-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.test-label {
  font-weight: 600;
  color: var(--color-primary);
}

.test-counter {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.test-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.timer {
  font-size: 1.1rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-primary);
  background: var(--color-primary-bg);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  min-width: 80px;
  text-align: center;
}

.timer.warning {
  color: var(--color-warning);
  background: var(--color-warning-bg);
}

.timer.danger {
  color: var(--color-error);
  background: var(--color-error-bg);
  animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.pause-icon {
  font-size: 0.75rem;
  letter-spacing: -2px;
}

/* ---- Main Content ---- */
#app {
  flex: 1;
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn:active {
  transform: translateY(0);
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
}

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

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.btn-danger {
  border-color: var(--color-error);
  color: var(--color-error);
}

.btn-danger:hover {
  background: var(--color-error-bg);
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 0.85rem 1.75rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

/* ---- Cards ---- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.card-desc {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 1rem;
  line-height: 1.5;
}

/* ---- Home Page ---- */
.home-hero {
  text-align: center;
  padding: 2rem 0 2.5rem;
}

.home-hero h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.home-hero p {
  color: var(--color-text-light);
  font-size: 1.05rem;
  max-width: 520px;
  margin: 0 auto;
}

.home-stats {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 1.5rem;
}

.stat-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.25rem;
  text-align: center;
}

.stat-value {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.mode-section {
  margin-top: 2.5rem;
}

.mode-section h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.section-card {
  cursor: pointer;
}

.section-card .card-icon.verbal {
  background: #e8f0ed;
  color: #4a7c6f;
}

.section-card .card-icon.numerik {
  background: #e8ecf0;
  color: #5a6f8a;
}

.section-card .card-icon.logika {
  background: #f0ece8;
  color: #8a7c5a;
}

.card-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

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

/* ---- Subcategory Selection ---- */
.subcategory-selection {
  padding: 1rem 0;
}

.subcategory-selection h2 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

.subcategory-selection p {
  color: var(--color-text-light);
  margin-bottom: 1.5rem;
}

.subcat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.subcat-card {
  padding: 1rem 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.subcat-name {
  font-weight: 600;
}

.subcat-count {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 1rem;
}

.back-link:hover {
  color: var(--color-primary);
}

/* ---- Question Display (Both Modes) ---- */
.question-container {
  max-width: 700px;
  margin: 0 auto;
}

.question-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
}

.question-type-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-primary);
  background: var(--color-primary-bg);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.question-passage {
  background: var(--color-warm-light);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--color-text);
  border-left: 3px solid var(--color-warm);
}

.question-text {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.choices-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.choice-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border: 2px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.95rem;
}

.choice-item:hover {
  border-color: var(--color-primary-light);
  background: var(--color-primary-bg);
}

.choice-item.selected {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
}

.choice-item.correct {
  border-color: var(--color-success);
  background: var(--color-success-bg);
}

.choice-item.wrong {
  border-color: var(--color-error);
  background: var(--color-error-bg);
}

.choice-item.disabled {
  pointer-events: none;
}

.choice-key {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  background: var(--color-bg);
  color: var(--color-text-light);
  flex-shrink: 0;
  transition: all var(--transition);
}

.choice-item.selected .choice-key {
  background: var(--color-primary);
  color: white;
}

.choice-item.correct .choice-key {
  background: var(--color-success);
  color: white;
}

.choice-item.wrong .choice-key {
  background: var(--color-error);
  color: white;
}

/* ---- Learning Mode Feedback ---- */
.feedback-card {
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  animation: slideUp 0.3s ease;
}

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

.feedback-correct {
  background: var(--color-success-bg);
  border: 1px solid var(--color-success);
}

.feedback-wrong {
  background: var(--color-error-bg);
  border: 1px solid var(--color-error);
}

.feedback-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.feedback-status {
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.feedback-correct .feedback-status {
  color: var(--color-success);
}

.feedback-wrong .feedback-status {
  color: var(--color-error);
}

.feedback-time {
  font-size: 0.85rem;
  color: var(--color-text-light);
  background: var(--color-surface);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
}

.feedback-explanation {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--color-text);
}

.feedback-explanation strong {
  color: var(--color-primary-dark);
}

/* ---- Question Navigation (Simulasi Mode) ---- */
.question-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.question-grid-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 600;
  padding: 0.4rem;
}

.question-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
  gap: 0.4rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
}

.q-grid-item {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 600;
  border: 2px solid var(--color-border-light);
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--transition);
}

.q-grid-item:hover {
  border-color: var(--color-primary);
}

.q-grid-item.current {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: white;
}

.q-grid-item.answered {
  background: var(--color-primary-bg);
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

.q-grid-item.flagged {
  background: var(--color-warning-bg);
  border-color: var(--color-warning);
  color: var(--color-warning);
}

/* ---- Learning Mode Progress ---- */
.learning-progress {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding: 0.75rem 1rem;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-light);
}

.learning-stats {
  display: flex;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.learning-stats span strong {
  color: var(--color-text);
}

.progress-bar-container {
  width: 100%;
  max-width: 200px;
  height: 6px;
  background: var(--color-border-light);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--color-primary);
  border-radius: 999px;
  transition: width 0.3s ease;
}

/* ---- Review Page ---- */
.review-summary {
  text-align: center;
  padding: 2rem;
  margin-bottom: 2rem;
}

.review-score {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-primary);
}

.review-score-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

.review-breakdown {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.breakdown-item {
  text-align: center;
}

.breakdown-value {
  font-size: 1.25rem;
  font-weight: 700;
}

.breakdown-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.review-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.review-bar-label {
  font-size: 0.85rem;
  min-width: 120px;
  color: var(--color-text-light);
}

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

.review-bar-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 0.5s ease;
}

.review-bar-fill.good {
  background: var(--color-success);
}

.review-bar-fill.ok {
  background: var(--color-warning);
}

.review-bar-fill.poor {
  background: var(--color-error);
}

.review-bar-value {
  font-size: 0.85rem;
  font-weight: 600;
  min-width: 40px;
  text-align: right;
}

.review-filters {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-main);
  color: var(--color-text-light);
}

.filter-btn:hover, .filter-btn.active {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

.review-question-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 0.75rem;
}

.review-question-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.review-q-number {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.review-q-status {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}

.review-q-status.correct {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.review-q-status.wrong {
  background: var(--color-error-bg);
  color: var(--color-error);
}

.review-q-text {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.review-answer-info {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.review-answer-info .correct-ans {
  color: var(--color-success);
  font-weight: 600;
}

.review-answer-info .wrong-ans {
  color: var(--color-error);
  text-decoration: line-through;
}

.review-explanation {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-border-light);
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.review-explanation-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 600;
  padding: 0.25rem 0;
  font-family: var(--font-main);
}

/* ---- Tips Page ---- */
.tips-tabs {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--color-border-light);
  padding-bottom: 0;
}

.tips-tab {
  padding: 0.75rem 1.25rem;
  border: none;
  background: none;
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition);
}

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

.tips-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tip-category {
  margin-bottom: 1.5rem;
}

.tip-category h3 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: var(--color-primary-dark);
}

.tip-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.tip-header {
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: background var(--transition);
}

.tip-header:hover {
  background: var(--color-surface-hover);
}

.tip-title {
  font-weight: 600;
  font-size: 0.95rem;
}

.tip-toggle {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  transition: transform var(--transition);
}

.tip-item.open .tip-toggle {
  transform: rotate(180deg);
}

.tip-body {
  padding: 0 1.25rem 1.25rem;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--color-text-light);
  display: none;
}

.tip-item.open .tip-body {
  display: block;
}

.tip-example {
  background: var(--color-warm-light);
  border-radius: var(--radius-sm);
  padding: 1rem;
  margin-top: 0.75rem;
  border-left: 3px solid var(--color-warm);
}

.tip-example strong {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--color-text);
}

/* ---- History Page ---- */
.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.history-header h2 {
  font-size: 1.3rem;
}

.history-empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-text-muted);
}

.history-empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.4;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.history-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: all var(--transition);
}

.history-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

.history-item-left {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.history-item-title {
  font-weight: 600;
  font-size: 0.95rem;
}

.history-item-date {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.history-item-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.history-score {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
}

.history-time {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ---- Modal ---- */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(44, 62, 54, 0.4);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 400px;
  width: 90%;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.modal-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.modal-content h2 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.modal-content p {
  color: var(--color-text-light);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.modal-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}

/* ---- Toast ---- */
#toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background: var(--color-text);
  color: white;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease;
  max-width: 320px;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

.toast.success {
  background: var(--color-success);
}

.toast.error {
  background: var(--color-error);
}

/* ---- Adaptive / Difficulty ---- */
.badge-new {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #7c5a8a;
  background: #f0e8f5;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  vertical-align: middle;
  margin-left: 0.5rem;
}

.btn-adaptive {
  background: linear-gradient(135deg, #7c5a8a, #5a6f8a);
  color: white;
  border: none;
}

.btn-adaptive:hover {
  background: linear-gradient(135deg, #6b4a79, #4a5f7a);
}

.question-badges {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.difficulty-badge, .difficulty-badge-sm {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}

.difficulty-badge-sm {
  font-size: 0.65rem;
  padding: 0.1rem 0.4rem;
}

.diff-easy, .diff-badge-sm.diff-easy {
  color: #4a8a5a;
  background: #e8f5eb;
}

.diff-medium, .diff-badge-sm.diff-medium {
  color: #8a7c4a;
  background: #f5f0e8;
}

.diff-hard, .diff-badge-sm.diff-hard {
  color: #8a4a5a;
  background: #f5e8eb;
}

.diff-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-left: 0.5rem;
  margin-right: 0.2rem;
}

.diff-dot.diff-easy { background: #4a8a5a; }
.diff-dot.diff-medium { background: #8a7c4a; }
.diff-dot.diff-hard { background: #8a4a5a; }

.adaptive-explanation {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.adaptive-explanation p {
  color: var(--color-text-light);
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

.adaptive-flow {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.diff-badge-sm {
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

.adaptive-arrow {
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

.adaptive-note {
  font-size: 0.8rem !important;
  color: var(--color-text-muted) !important;
  margin-bottom: 0 !important;
}

.adaptive-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: rgba(255,255,255,0.5);
  border-radius: var(--radius-sm);
}

.adaptive-info strong {
  color: var(--color-primary);
}

.subcat-difficulty-info {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 0.35rem;
}

.weighted-score-info {
  margin-top: 0.75rem;
  padding: 0.5rem 1rem;
  background: #f0e8f5;
  border-radius: var(--radius-sm);
  display: inline-block;
}

.weighted-score-info span {
  font-size: 0.9rem;
  color: #5a4a6a;
}

.weighted-score-info .weighted-note {
  display: block;
  font-size: 0.75rem;
  color: #8a7c9a;
  margin-top: 0.15rem;
}

/* ---- Footer ---- */
#app-footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border-light);
  margin-top: auto;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  #main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    padding: 0.5rem;
    border-bottom: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-md);
  }

  #main-nav.open {
    display: flex;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .home-stats {
    flex-direction: column;
    align-items: center;
  }

  .section-grid {
    grid-template-columns: 1fr;
  }

  .question-card {
    padding: 1.25rem;
  }

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

  .history-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .history-item-right {
    width: 100%;
    justify-content: space-between;
  }

  .review-breakdown {
    flex-direction: column;
    align-items: center;
  }

  .test-header-content {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
}