/* ============================================================
   AutoGenius – css/main.css
   Complete Production Stylesheet
   ============================================================ */

/* ── 1. CSS CUSTOM PROPERTIES ──────────────────────────────── */
:root {
  /* Backgrounds */
  --bg-primary:         #0a0e1a;
  --bg-secondary:       #0f1628;
  --bg-card:            #141d35;
  --bg-card-hover:      #1a2540;
  --border-color:       #1e2d4a;

  /* Text */
  --text-primary:       #e8edf5;
  --text-secondary:     #8899bb;
  --text-muted:         #4a5870;

  /* Accent colours */
  --accent-blue:        #00b4ff;
  --accent-blue-dim:    #0077aa;
  --accent-orange:      #ff6b35;
  --accent-orange-dim:  #cc4a1a;

  /* Semantic colours */
  --success:            #00e676;
  --warning:            #ffab00;
  --danger:             #ff3d71;
  --info:               #00b4ff;

  /* Severity */
  --severity-high:      #ff3d71;
  --severity-medium:    #ffab00;
  --severity-low:       #00e676;

  /* Shadows */
  --shadow-card:        0 4px 24px rgba(0, 180, 255, 0.08);
  --shadow-elevated:    0 8px 40px rgba(0, 0, 0, 0.6);

  /* Border radii */
  --radius-sm:          8px;
  --radius-md:          12px;
  --radius-lg:          20px;
  --radius-xl:          28px;

  /* Layout */
  --nav-height:         70px;
  --header-height:      60px;

  /* Transitions */
  --transition-fast:    0.15s ease;
  --transition-normal:  0.25s ease;
  --transition-slow:    0.4s cubic-bezier(0.4, 0, 0.2, 1);

  /* Typography scale */
  --font-size-xs:       11px;
  --font-size-sm:       13px;
  --font-size-base:     15px;
  --font-size-md:       17px;
  --font-size-lg:       20px;
  --font-size-xl:       24px;
  --font-size-2xl:      30px;
}

/* ── 2. CSS RESET & BOX-SIZING ─────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--font-size-base);
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont,
               'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  min-height: -webkit-fill-available;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

p,
h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

ul, ol {
  list-style: none;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ── 3. APP SHELL ──────────────────────────────────────────── */
#app {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-primary);
}

.app-body {
  flex: 1;
  position: relative;
  overflow: hidden;
  margin-top: var(--header-height);
  margin-bottom: var(--nav-height);
}

/* ── 4. HEADER ─────────────────────────────────────────────── */
.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(10, 14, 26, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  padding-top: env(safe-area-inset-top, 0px);
  z-index: 900;
  gap: 12px;
}

.app-header .logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.app-header .logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-orange));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  line-height: 1;
}

.app-header .logo-text {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.app-header .logo-text span {
  color: var(--accent-blue);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-icon-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: rgba(30, 45, 74, 0.5);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 18px;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.header-icon-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--accent-blue);
}

.header-icon-btn:active {
  transform: scale(0.93);
}

.offline-badge {
  display: none;
  align-items: center;
  gap: 5px;
  background: rgba(255, 171, 0, 0.12);
  border: 1px solid rgba(255, 171, 0, 0.35);
  color: var(--warning);
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-xl);
  letter-spacing: 0.3px;
}

.offline-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--warning);
  animation: pulse 2s infinite;
}

body.offline .offline-badge {
  display: flex;
}

/* ── 5. BOTTOM NAVIGATION ──────────────────────────────────── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: rgba(10, 14, 26, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: stretch;
  z-index: 900;
}

.nav-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  position: relative;
  border: none;
  background: transparent;
  color: var(--text-muted);
  transition: color var(--transition-fast);
  padding: 8px 4px;
  -webkit-tap-highlight-color: transparent;
  overflow: hidden;
}

.nav-tab::before {
  content: '';
  position: absolute;
  top: 0;
  left: 20%;
  right: 20%;
  height: 2px;
  background: var(--accent-blue);
  border-radius: 0 0 2px 2px;
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.nav-tab.active {
  color: var(--accent-blue);
}

.nav-tab.active::before {
  transform: scaleX(1);
}

.nav-tab .nav-icon {
  font-size: 22px;
  line-height: 1;
  transition: transform var(--transition-fast);
}

.nav-tab.active .nav-icon {
  transform: translateY(-1px);
}

.nav-tab .nav-label {
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.2px;
}

/* ── 6. SCREENS ────────────────────────────────────────────── */
.screen {
  position: absolute;
  inset: 0;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  padding: 16px 16px 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal), transform var(--transition-slow);
  transform: translateX(20px);
  will-change: opacity, transform;
}

.screen.active {
  opacity: 1;
  pointer-events: all;
  transform: translateX(0);
}

.screen-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.screen-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: 20px;
}

/* ── 7. CARDS ──────────────────────────────────────────────── */
.card {
  background: rgba(20, 29, 53, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-normal),
              box-shadow var(--transition-normal),
              border-color var(--transition-normal),
              background var(--transition-normal);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.card:hover,
.card:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 180, 255, 0.16);
  border-color: rgba(0, 180, 255, 0.4);
  background: rgba(26, 37, 64, 0.95);
}

.card:active {
  transform: translateY(0);
  box-shadow: var(--shadow-card);
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.card-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
}

.card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: 2px;
}

.card-body {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
  gap: 8px;
}

/* Severity-tinted cards */
.card.severity-high  { border-left: 3px solid var(--severity-high);   }
.card.severity-medium{ border-left: 3px solid var(--severity-medium); }
.card.severity-low   { border-left: 3px solid var(--severity-low);    }

/* ── 8. SEARCH BAR ─────────────────────────────────────────── */
.search-bar {
  position: relative;
  margin-bottom: 16px;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 18px;
  pointer-events: none;
  line-height: 1;
}

.search-input {
  width: 100%;
  height: 52px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 0 16px 0 46px;
  font-size: var(--font-size-base);
  color: var(--text-primary);
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              background var(--transition-fast);
  outline: none;
  -webkit-appearance: none;
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-input:focus {
  border-color: var(--accent-blue);
  background: var(--bg-card-hover);
  box-shadow: 0 0 0 3px rgba(0, 180, 255, 0.15);
}

.search-clear {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 14px;
}

.search-input:not(:placeholder-shown) ~ .search-clear {
  display: flex;
}

/* ── 9. BADGES / PILLS ─────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-xl);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  white-space: nowrap;
  line-height: 1.5;
}

.badge-high {
  background: rgba(255, 61, 113, 0.15);
  color: var(--severity-high);
  border: 1px solid rgba(255, 61, 113, 0.3);
}

.badge-medium {
  background: rgba(255, 171, 0, 0.15);
  color: var(--severity-medium);
  border: 1px solid rgba(255, 171, 0, 0.3);
}

.badge-low {
  background: rgba(0, 230, 118, 0.12);
  color: var(--severity-low);
  border: 1px solid rgba(0, 230, 118, 0.25);
}

.badge-easy {
  background: rgba(0, 230, 118, 0.12);
  color: var(--severity-low);
  border: 1px solid rgba(0, 230, 118, 0.25);
}

.badge-medium-diff {
  background: rgba(255, 171, 0, 0.15);
  color: var(--severity-medium);
  border: 1px solid rgba(255, 171, 0, 0.3);
}

.badge-hard {
  background: rgba(255, 61, 113, 0.15);
  color: var(--severity-high);
  border: 1px solid rgba(255, 61, 113, 0.3);
}

.badge-pro {
  background: linear-gradient(135deg, rgba(0, 180, 255, 0.15), rgba(255, 107, 53, 0.15));
  color: var(--accent-blue);
  border: 1px solid rgba(0, 180, 255, 0.35);
}

.badge-info {
  background: rgba(0, 180, 255, 0.12);
  color: var(--accent-blue);
  border: 1px solid rgba(0, 180, 255, 0.25);
}

/* ── 10. MODALS ────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 18, 0.85);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  width: 100%;
  max-width: 600px;
  max-height: 92vh;
  background: var(--bg-secondary);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  border: 1px solid var(--border-color);
  border-bottom: none;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  box-shadow: var(--shadow-elevated);
  transform: translateY(100%);
  transition: transform var(--transition-slow);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

.modal-overlay.open .modal-content {
  transform: translateY(0);
}

.modal-handle {
  width: 40px;
  height: 4px;
  background: var(--border-color);
  border-radius: 2px;
  margin: 12px auto 0;
}

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

.modal-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 18px;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

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

.modal-body {
  padding: 20px;
}

/* ── 11. PROGRESS BARS ─────────────────────────────────────── */
.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(30, 45, 74, 0.8);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: var(--radius-xl);
  background: linear-gradient(90deg, var(--accent-blue), #0077dd);
  transition: width var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.progress-fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  animation: shimmer 2s infinite;
}

.progress-fill.success { background: linear-gradient(90deg, var(--success), #00b356); }
.progress-fill.warning { background: linear-gradient(90deg, var(--warning), #cc8800); }
.progress-fill.danger  { background: linear-gradient(90deg, var(--danger),  #cc2255); }

/* ── 12. BUTTONS ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  border: none;
  outline: none;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast),
              box-shadow var(--transition-fast),
              background var(--transition-fast),
              border-color var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
  white-space: nowrap;
  letter-spacing: 0.2px;
}

.btn:active {
  transform: scale(0.96);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), #0088cc);
  color: #fff;
  box-shadow: 0 4px 16px rgba(0, 180, 255, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #22c6ff, var(--accent-blue));
  box-shadow: 0 6px 24px rgba(0, 180, 255, 0.45);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-blue);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger), #cc0044);
  color: #fff;
  box-shadow: 0 4px 16px rgba(255, 61, 113, 0.3);
}

.btn-danger:hover {
  box-shadow: 0 6px 24px rgba(255, 61, 113, 0.45);
}

.btn-ghost {
  background: transparent;
  color: var(--accent-blue);
  border: 1px solid rgba(0, 180, 255, 0.35);
}

.btn-ghost:hover {
  background: rgba(0, 180, 255, 0.08);
  border-color: var(--accent-blue);
}

.btn-full { width: 100%; }

.btn-sm {
  min-height: 36px;
  padding: 8px 16px;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn-lg {
  min-height: 56px;
  padding: 14px 32px;
  font-size: var(--font-size-md);
  border-radius: var(--radius-lg);
}

.btn:disabled {
  opacity: 0.45;
  pointer-events: none;
}

/* ── 13. TOAST NOTIFICATIONS ───────────────────────────────── */
.toast-container {
  position: fixed;
  top: calc(var(--header-height) + 12px);
  right: 12px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
  max-width: 340px;
  width: calc(100% - 24px);
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-elevated);
  pointer-events: all;
  animation: toastIn var(--transition-normal) forwards;
  transition: opacity var(--transition-normal), transform var(--transition-normal);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.toast.dismissing {
  opacity: 0;
  transform: translateX(110%);
}

.toast-icon {
  font-size: 20px;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 1px;
}

.toast-body { flex: 1; }

.toast-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.toast-message {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  line-height: 1.5;
}

.toast-success { border-left: 3px solid var(--success);  }
.toast-warning { border-left: 3px solid var(--warning);  }
.toast-error   { border-left: 3px solid var(--danger);   }
.toast-info    { border-left: 3px solid var(--accent-blue); }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(110%); }
  to   { opacity: 1; transform: translateX(0);    }
}

/* ── 14. CATEGORY GRID ─────────────────────────────────────── */
.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.category-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  transition: all var(--transition-normal);
  min-height: 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.category-item:hover,
.category-item:focus-visible {
  border-color: var(--accent-blue);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.category-item:active {
  transform: scale(0.97);
}

.category-icon {
  font-size: 32px;
  line-height: 1;
}

.category-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.category-count {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

/* ── 15. WIZARD / STEPPER ──────────────────────────────────── */
.wizard-container {
  padding: 4px 0;
}

.wizard-progress {
  display: flex;
  align-items: center;
  margin-bottom: 24px;
  gap: 0;
}

.wizard-step-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex: 1;
  position: relative;
}

.wizard-step-indicator:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 16px;
  left: 50%;
  width: 100%;
  height: 2px;
  background: var(--border-color);
  z-index: 0;
}

.wizard-step-indicator.done::after {
  background: var(--accent-blue);
}

.wizard-step-circle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--text-muted);
  position: relative;
  z-index: 1;
  transition: all var(--transition-normal);
}

.wizard-step-indicator.active .wizard-step-circle {
  border-color: var(--accent-blue);
  background: var(--accent-blue);
  color: #fff;
  box-shadow: 0 0 16px rgba(0, 180, 255, 0.4);
}

.wizard-step-indicator.done .wizard-step-circle {
  border-color: var(--success);
  background: var(--success);
  color: #fff;
}

.wizard-step-label {
  font-size: 10px;
  color: var(--text-muted);
  font-weight: 500;
  text-align: center;
  line-height: 1.3;
  width: 60px;
}

.wizard-step-indicator.active .wizard-step-label {
  color: var(--accent-blue);
}

.wizard-step {
  display: none;
}

.wizard-step.active {
  display: block;
  animation: fadeIn 0.2s ease;
}

.wizard-nav {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.wizard-nav .btn { flex: 1; }

/* ── 16. COLLAPSIBLE SECTIONS ──────────────────────────────── */
.collapsible {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 8px;
}

.collapsible-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--bg-card);
  cursor: pointer;
  transition: background var(--transition-fast);
  user-select: none;
  -webkit-user-select: none;
}

.collapsible-header:hover {
  background: var(--bg-card-hover);
}

.collapsible-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--text-primary);
}

.collapsible-chevron {
  color: var(--text-muted);
  font-size: 16px;
  transition: transform var(--transition-normal);
  flex-shrink: 0;
}

.collapsible.open .collapsible-chevron {
  transform: rotate(180deg);
}

.collapsible-content {
  max-height: 0;
  overflow: hidden;
  background: var(--bg-secondary);
  transition: max-height var(--transition-slow), padding var(--transition-normal);
  padding: 0 16px;
}

.collapsible.open .collapsible-content {
  max-height: 1000px;
  padding: 16px;
}

/* ── 17. TOOL CHECKLIST ────────────────────────────────────── */
.tool-checklist {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.tool-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tool-item:hover {
  background: var(--bg-card-hover);
  border-color: rgba(0, 180, 255, 0.3);
}

.tool-item.checked {
  border-color: var(--success);
  background: rgba(0, 230, 118, 0.06);
}

.tool-checkbox {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  border: 2px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-fast);
  color: transparent;
  font-size: 13px;
}

.tool-item.checked .tool-checkbox {
  background: var(--success);
  border-color: var(--success);
  color: #fff;
}

.tool-name {
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  font-weight: 500;
}

.tool-item.checked .tool-name {
  text-decoration: line-through;
  color: var(--text-muted);
}

/* ── 18. GLOSSARY ──────────────────────────────────────────── */
.az-index {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.az-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.az-btn:hover,
.az-btn.active {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
  color: #fff;
}

.az-btn:disabled {
  opacity: 0.3;
  pointer-events: none;
}

.glossary-section {
  margin-bottom: 24px;
}

.glossary-letter {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--accent-blue);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid rgba(0, 180, 255, 0.2);
}

.glossary-term {
  padding: 14px 0;
  border-bottom: 1px solid rgba(30, 45, 74, 0.5);
}

.glossary-term:last-child {
  border-bottom: none;
}

.glossary-word {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.glossary-definition {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── 19. SETTINGS ──────────────────────────────────────────── */
.settings-group {
  margin-bottom: 24px;
}

.settings-group-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  padding: 0 4px;
  margin-bottom: 8px;
}

.settings-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: 2px;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.settings-item:first-of-type { border-radius: var(--radius-md) var(--radius-md) var(--radius-sm) var(--radius-sm); }
.settings-item:last-of-type  { border-radius: var(--radius-sm) var(--radius-sm) var(--radius-md) var(--radius-md); }

.settings-item:hover {
  background: var(--bg-card-hover);
}

.settings-item-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}

.settings-item-icon {
  font-size: 22px;
  line-height: 1;
  width: 28px;
  text-align: center;
}

.settings-item-info { flex: 1; }

.settings-item-name {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--text-primary);
}

.settings-item-desc {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: 1px;
}

/* Toggle switch */
.toggle-switch {
  width: 48px;
  height: 26px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 13px;
  position: relative;
  cursor: pointer;
  transition: background var(--transition-normal), border-color var(--transition-normal);
  flex-shrink: 0;
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: transform var(--transition-normal), background var(--transition-normal);
}

.toggle-switch.on {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
}

.toggle-switch.on::after {
  transform: translateX(22px);
  background: #fff;
}

/* ── 20. OFFLINE BANNER ────────────────────────────────────── */
.offline-banner {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  z-index: 850;
  background: rgba(255, 171, 0, 0.12);
  border-bottom: 1px solid rgba(255, 171, 0, 0.35);
  padding: 8px 16px;
  text-align: center;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--warning);
  letter-spacing: 0.3px;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

body.offline .offline-banner {
  display: flex;
}

/* ── 21. SKELETON LOADERS ──────────────────────────────────── */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-card) 25%,
    var(--bg-card-hover) 50%,
    var(--bg-card) 75%
  );
  background-size: 400% 100%;
  animation: shimmer 1.5s infinite ease-in-out;
  border-radius: var(--radius-sm);
}

.skeleton-text {
  height: 14px;
  width: 100%;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.skeleton-text.short  { width: 55%; }
.skeleton-text.medium { width: 75%; }

.skeleton-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 10px;
}

.skeleton-card .skeleton-title {
  height: 18px;
  width: 60%;
  margin-bottom: 12px;
}

.skeleton-card .skeleton-line {
  height: 12px;
  width: 100%;
  margin-bottom: 6px;
}

.skeleton-card .skeleton-line.short { width: 40%; }

/* ── 22. HERO SECTION ──────────────────────────────────────── */
.hero {
  background: linear-gradient(
    135deg,
    rgba(0, 40, 80, 0.95) 0%,
    rgba(10, 14, 26, 0.98) 60%,
    rgba(30, 15, 8, 0.95) 100%
  );
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 28px 20px;
  margin-bottom: 16px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 180, 255, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30px;
  left: -20px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-eyebrow {
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 8px;
}

.hero-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 10px;
  letter-spacing: -0.5px;
}

.hero-title em {
  color: var(--accent-blue);
  font-style: normal;
}

.hero-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 300px;
}

.hero-engine-icon {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 64px;
  opacity: 0.15;
  animation: enginePulse 3s ease-in-out infinite;
}

/* ── 23. QUICK ACCESS GRID ─────────────────────────────────── */
.quick-access-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.quick-access-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 18px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  transition: all var(--transition-normal);
  overflow: hidden;
  position: relative;
}

.quick-access-item::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.quick-access-item:hover::before,
.quick-access-item:focus-visible::before {
  opacity: 1;
}

.quick-access-item:hover,
.quick-access-item:focus-visible {
  border-color: rgba(0, 180, 255, 0.4);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.qa-icon {
  font-size: 26px;
  line-height: 1;
  flex-shrink: 0;
}

.qa-text { flex: 1; }

.qa-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.qa-desc {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

/* ── 24. RECENTLY VIEWED ───────────────────────────────────── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.section-title {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--text-primary);
}

.section-link {
  font-size: var(--font-size-sm);
  color: var(--accent-blue);
  cursor: pointer;
}

.recent-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.recent-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.recent-item:hover {
  background: var(--bg-card-hover);
  border-color: rgba(0, 180, 255, 0.3);
}

.recent-item-icon {
  font-size: 20px;
  line-height: 1;
  width: 36px;
  height: 36px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.recent-item-body { flex: 1; overflow: hidden; }

.recent-item-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.recent-item-meta {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: 2px;
}

.recent-item-chevron {
  color: var(--text-muted);
  font-size: 14px;
  flex-shrink: 0;
}

/* ── 25. TIP ROTATOR ───────────────────────────────────────── */
.tip-card {
  background: linear-gradient(135deg, rgba(0, 180, 255, 0.08), rgba(255, 107, 53, 0.05));
  border: 1px solid rgba(0, 180, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: 18px;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}

.tip-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.tip-icon { font-size: 18px; }

.tip-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-blue);
}

.tip-text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.7;
}

.tip-dots {
  display: flex;
  gap: 6px;
  margin-top: 12px;
}

.tip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border-color);
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.tip-dot.active {
  background: var(--accent-blue);
  transform: scale(1.25);
}

/* ── 26. DETAIL MODAL SECTIONS ─────────────────────────────── */
.detail-section {
  margin-bottom: 24px;
}

.detail-section-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.detail-section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-color);
}

/* Cause probability bars */
.cause-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cause-item {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.cause-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cause-name {
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  font-weight: 500;
}

.cause-pct {
  font-size: var(--font-size-xs);
  color: var(--accent-blue);
  font-weight: 700;
}

/* Fix steps */
.fix-steps {
  counter-reset: step-counter;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.fix-step {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  counter-increment: step-counter;
}

.fix-step::before {
  content: counter(step-counter);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  min-width: 26px;
  border-radius: 50%;
  background: var(--accent-blue);
  color: #fff;
  font-size: var(--font-size-xs);
  font-weight: 700;
}

.fix-step-text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  padding-top: 3px;
}

/* Cost badge */
.cost-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(0, 230, 118, 0.1);
  border: 1px solid rgba(0, 230, 118, 0.25);
  border-radius: var(--radius-xl);
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--success);
}

.cost-badge.expensive {
  background: rgba(255, 61, 113, 0.1);
  border-color: rgba(255, 61, 113, 0.25);
  color: var(--danger);
}

/* ── 27. SVG DIAGRAM CONTAINER ─────────────────────────────── */
.diagram-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  overflow: auto;
  margin-bottom: 16px;
}

.diagram-container svg {
  max-width: 100%;
  display: block;
  margin: 0 auto;
}

.diagram-label {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  text-align: center;
  margin-top: 10px;
  font-style: italic;
}

.diagram-controls {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 12px;
}

/* ── 28. RIPPLE EFFECT ─────────────────────────────────────── */
.ripple-container {
  position: relative;
  overflow: hidden;
}

.ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  animation: ripple 0.55s linear;
  background: rgba(255, 255, 255, 0.12);
  pointer-events: none;
}

/* ── 29. SCROLLBAR ─────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 4px;
  height: 4px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}

/* ── 30. FOCUS STYLES (ACCESSIBILITY) ──────────────────────── */
:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}

.btn:focus-visible,
.nav-tab:focus-visible,
.card:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}

/* ── 31. MOBILE SAFE AREA ──────────────────────────────────── */
.bottom-nav {
  padding-bottom: calc(env(safe-area-inset-bottom, 0px) + 8px);
}

.screen {
  padding-bottom: calc(24px + env(safe-area-inset-bottom, 0px));
}

/* ── 32. GLOBAL ANIMATIONS (KEYFRAMES) ─────────────────────── */
@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@keyframes pulse {
  0%, 100% { opacity: 1;   transform: scale(1); }
  50%       { opacity: 0.7; transform: scale(1.04); }
}

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

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

@keyframes enginePulse {
  0%, 100% { transform: translateY(-50%) scale(1);    opacity: 0.15; }
  50%       { transform: translateY(-50%) scale(1.06); opacity: 0.22; }
}

@keyframes ripple {
  to { transform: scale(4); opacity: 0; }
}

/* ── 33. UTILITY HELPERS ───────────────────────────────────── */
.text-primary   { color: var(--text-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted     { color: var(--text-muted) !important; }
.text-accent    { color: var(--accent-blue) !important; }
.text-success   { color: var(--success) !important; }
.text-warning   { color: var(--warning) !important; }
.text-danger    { color: var(--danger) !important; }

.text-center { text-align: center !important; }
.text-left   { text-align: left !important;   }
.text-right  { text-align: right !important;  }

.font-bold   { font-weight: 700 !important; }
.font-semi   { font-weight: 600 !important; }
.font-normal { font-weight: 400 !important; }

.mt-4  { margin-top:    4px  !important; }
.mt-8  { margin-top:    8px  !important; }
.mt-12 { margin-top:   12px  !important; }
.mt-16 { margin-top:   16px  !important; }
.mt-24 { margin-top:   24px  !important; }
.mb-4  { margin-bottom:  4px !important; }
.mb-8  { margin-bottom:  8px !important; }
.mb-12 { margin-bottom: 12px !important; }
.mb-16 { margin-bottom: 16px !important; }
.mb-24 { margin-bottom: 24px !important; }

.d-flex        { display: flex !important;         }
.d-grid        { display: grid !important;         }
.d-block       { display: block !important;        }
.d-none        { display: none !important;         }
.flex-col      { flex-direction: column !important;}
.align-center  { align-items: center !important;   }
.justify-between{ justify-content: space-between !important; }
.gap-8         { gap: 8px !important;  }
.gap-12        { gap: 12px !important; }
.gap-16        { gap: 16px !important; }
.flex-1        { flex: 1 !important;   }

.w-full        { width: 100% !important;  }
.h-full        { height: 100% !important; }

.rounded-sm    { border-radius: var(--radius-sm) !important; }
.rounded-md    { border-radius: var(--radius-md) !important; }
.rounded-lg    { border-radius: var(--radius-lg) !important; }
.rounded-full  { border-radius: 9999px !important; }

.overflow-hidden { overflow: hidden !important; }
.truncate {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.divider {
  width: 100%;
  height: 1px;
  background: var(--border-color);
  margin: 16px 0;
}

.empty-state {
  text-align: center;
  padding: 48px 24px;
}

.empty-state-icon {
  font-size: 56px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.empty-state-desc {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 280px;
  margin: 0 auto;
}

/* ── 34. RESPONSIVE TWEAKS ─────────────────────────────────── */
@media (min-width: 480px) {
  .category-grid    { grid-template-columns: repeat(3, 1fr); }
  .quick-access-grid{ grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 640px) {
  .modal-content { border-radius: var(--radius-xl); }
  .modal-overlay { align-items: center; }
  :root { --nav-height: 64px; }
}

@media (prefers-color-scheme: light) {
  /* AutoGenius is intentionally dark-only; no light override needed */
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}