:root {
  
  --bg-0: #0c0a2e;
  --bg-1: #1a1040;
  --bg-2: #2d1b69;
  --card-bg: rgba(255,255,255,.06);
  --card-bg-hover: rgba(255,255,255,.10);
  --card-border: rgba(255,255,255,.08);
  --card-border-hover: rgba(192,132,252,.3);
  --accent: #7c3aed;
  --accent-hover: #6d28d9;
  --accent-light: #c084fc;
  --accent-grad: linear-gradient(135deg, #7c3aed, #6366f1);
  --title-grad: linear-gradient(135deg, #c084fc, #818cf8);
  --title-grad-v2: linear-gradient(135deg, #7c3aed, #a78bfa, #c4b5fd);
  
  
  --text: #e0d6ff;
  --text-dim: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #a78bfa;
  
  
  --success: #22c55e;
  --warning: #eab308;
  --danger: #ef4444;
  --info: #818cf8;
  
  
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 14px;
  --space-lg: 20px;
  --space-xl: 24px;
  
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 999px;
  
  
  --shadow-sm: 0 2px 8px rgba(0,0,0,.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,.25);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.3);
  --shadow-accent: 0 8px 24px rgba(124,58,237,.3);
  
  
  --font: -apple-system, BlinkMacSystemFont, 'Noto Sans SC', 'PingFang SC', sans-serif;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 20px;
  --font-size-2xl: 26px;
  --font-size-3xl: 32px;
  
  
  --transition-fast: .15s ease;
  --transition-base: .25s ease;
  --transition-slow: .4s ease;
  
  
  --z-stars: 0;
  --z-content: 1;
  --z-dropdown: 100;
  --z-modal: 200;
  --z-loading: 999;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font);
  background: linear-gradient(180deg, var(--bg-0), var(--bg-1), var(--bg-2));
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}


.stars {
  position: fixed; inset: 0; overflow: hidden;
  pointer-events: none; z-index: var(--z-stars);
}
.stars span {
  position: absolute; width: 2px; height: 2px;
  background: #fff; border-radius: 50%;
  animation: twinkle var(--d) ease-in-out infinite alternate;
}
@keyframes twinkle {
  0% { opacity: .15; }
  100% { opacity: .9; }
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .5; }
}
@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(.95); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes ripple {
  to { transform: scale(4); opacity: 0; }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}


.container {
  position: relative; z-index: var(--z-content);
  max-width: 720px; margin: 0 auto;
  padding: var(--space-xl) 16px 60px;
}


h1 {
  font-size: var(--font-size-2xl); font-weight: 800;
  background: var(--title-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-align: center; margin-bottom: var(--space-xs);
}
.subtitle {
  text-align: center; color: var(--text-dim);
  font-size: 13px; margin-bottom: var(--space-lg);
}


.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
  animation: fadeUp var(--transition-slow) ease;
  transition: background var(--transition-base), border-color var(--transition-base),
              transform var(--transition-base), box-shadow var(--transition-base);
}
.card:hover {
  background: var(--card-bg-hover);
}
.card-highlight {
  border-color: rgba(192,132,252,.25);
  background: rgba(192,132,252,.06);
}
.card-title {
  font-size: 15px; font-weight: 600;
  color: var(--accent-light); margin-bottom: var(--space-md);
  display: flex; align-items: center; gap: var(--space-sm);
}


label {
  font-size: 13px; font-weight: 500;
  color: var(--text-accent); display: block;
  margin-bottom: var(--space-xs); margin-top: var(--space-sm);
}
.row { display: flex; gap: 10px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 120px; }

select, input[type="text"], input[type="number"], input[type="email"], textarea {
  width: 100%; padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,.1);
  background: rgba(255,255,255,.04);
  color: var(--text); font-size: var(--font-size-base);
  outline: none; font-family: inherit;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}
select:focus, input:focus, textarea:focus {
  border-color: var(--info);
  box-shadow: 0 0 0 3px rgba(129,140,248,.15);
}
textarea { min-height: 100px; resize: vertical; line-height: 1.7; }


.chip-group { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.chip {
  padding: 8px 16px; border-radius: var(--radius-full);
  border: 1px solid rgba(255,255,255,.1);
  font-size: 13px; cursor: pointer;
  background: transparent; color: var(--text-dim);
  transition: all var(--transition-fast); user-select: none;
  position: relative; overflow: hidden;
}
.chip:hover { 
  background: rgba(192,132,252,.1); 
  border-color: var(--accent-light); 
  color: var(--text);
  transform: translateY(-1px);
}
.chip.active, .chip.selected { 
  background: rgba(192,132,252,.2); 
  border-color: var(--accent-light); 
  color: var(--accent-light); 
}
.chip input { display: none; }
.chip input:checked + label { 
  background: var(--accent); color: #fff; 
  border-color: var(--accent); 
}


.radio-row { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0; }
.radio-row label {
  padding: 8px 16px; border-radius: var(--radius-full);
  border: 1px solid rgba(255,255,255,.1);
  font-size: 13px; cursor: pointer;
  background: transparent; color: var(--text-dim);
  transition: all var(--transition-fast);
  margin: 0; text-align: center;
}
.radio-row label:hover {
  background: rgba(192,132,252,.1);
  border-color: var(--accent-light);
  color: var(--text);
}
.radio-row input:checked + label {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.radio-row input { display: none; }


.btn {
  padding: 14px 24px; border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-lg); font-weight: 600;
  cursor: pointer; transition: all var(--transition-base);
  font-family: inherit; display: inline-flex;
  align-items: center; justify-content: center;
  gap: var(--space-sm); position: relative; overflow: hidden;
}
.btn:active { transform: scale(.97); }
.btn-primary {
  background: var(--accent-grad);
  color: #fff; width: 100%; margin-top: var(--space-md);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}
.btn-primary:disabled {
  opacity: .5; cursor: not-allowed; transform: none;
  box-shadow: none;
}
.btn-secondary {
  background: transparent;
  border: 1px solid rgba(255,255,255,.15);
  color: var(--text);
}
.btn-secondary:hover {
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.3);
}
.btn-sm {
  padding: 8px 16px; font-size: 13px;
  width: auto; border-radius: var(--radius-sm);
}
.btn-icon {
  width: 40px; height: 40px; padding: 0;
  border-radius: var(--radius-sm);
  display: inline-flex; align-items: center; justify-content: center;
}


.spinner {
  display: inline-block; width: 24px; height: 24px;
  border: 3px solid rgba(255,255,255,.1);
  border-top-color: var(--info);
  border-radius: 50%; animation: spin .8s linear infinite;
  vertical-align: middle;
}
.spinner-sm { width: 16px; height: 16px; border-width: 2px; }
.spinner-lg { width: 40px; height: 40px; border-width: 4px; }

.loading-overlay {
  position: fixed; inset: 0; z-index: var(--z-loading);
  background: rgba(12,10,46,.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  animation: fadeIn var(--transition-base) ease;
}
.loading-overlay .spinner { width: 44px; height: 44px; border-width: 4px; }
.loading-overlay p {
  color: var(--text-dim); font-size: 14px;
  margin-top: 16px; animation: pulse 1.5s ease infinite;
}
.loading-overlay .sub-text {
  color: var(--text-muted); font-size: 12px;
  margin-top: 6px;
}


.result-card {
  background: rgba(255,255,255,.06);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 16px; margin-bottom: 10px;
  animation: slideUp var(--transition-slow) ease;
}
.result-card .rt {
  font-size: 14px; font-weight: 600;
  color: var(--text-accent); margin-bottom: var(--space-sm);
  display: flex; align-items: center; gap: 6px;
}
.result-card .rb {
  font-size: var(--font-size-base); line-height: 1.8;
  color: rgba(255,255,255,.8);
}

.score-display {
  text-align: center; padding: var(--space-lg);
  animation: scaleIn var(--transition-slow) ease;
}
.score-display .sv {
  font-size: 52px; font-weight: 800;
  background: var(--title-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.score-display .sl {
  font-size: var(--font-size-base); color: var(--text-dim);
  margin-top: var(--space-xs);
}

.level-badge {
  display: inline-block; padding: 4px 16px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-base); font-weight: 600;
}
.level-badge.green { background: rgba(34,197,94,.15); color: var(--success); }
.level-badge.yellow { background: rgba(234,179,8,.15); color: var(--warning); }
.level-badge.orange { background: rgba(249,115,22,.15); color: #f97316; }
.level-badge.red { background: rgba(239,68,68,.15); color: var(--danger); }


.bar { height: 8px; border-radius: var(--radius-full); background: rgba(255,255,255,.06); margin: 8px 0; overflow: hidden; }
.bar-fill { height: 100%; border-radius: var(--radius-full); background: var(--accent-grad); transition: width 1s ease; }
.bar-fill.green { background: linear-gradient(90deg, #16a34a, #22c55e); }
.bar-fill.yellow { background: linear-gradient(90deg, #ca8a04, #eab308); }
.bar-fill.red { background: linear-gradient(90deg, #dc2626, #ef4444); }


.chart-container {
  background: rgba(255,255,255,.03);
  border-radius: var(--radius-sm);
  padding: var(--space-lg);
  margin: var(--space-md) 0;
  min-height: 200px;
}


.action-bar {
  display: flex; gap: var(--space-sm); flex-wrap: wrap;
  margin-top: var(--space-md); justify-content: center;
}
.action-bar .btn-sm { flex: 0 1 auto; }


.recommend-section {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255,255,255,.06);
}
.recommend-section .rt { font-size: 14px; font-weight: 600; color: var(--text-accent); margin-bottom: var(--space-md); }
.recommend-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 8px; }
.recommend-card {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: var(--radius-md);
  padding: 12px; text-align: center;
  cursor: pointer; transition: all var(--transition-base);
  text-decoration: none; color: var(--text);
  display: block;
}
.recommend-card:hover {
  background: rgba(192,132,252,.1);
  border-color: var(--card-border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.recommend-card .emoji { font-size: 24px; display: block; margin-bottom: 4px; }
.recommend-card .name { font-size: 12px; font-weight: 600; }
.recommend-card .desc { font-size: 10px; color: var(--text-dim); margin-top: 2px; }


.history-section { margin-top: var(--space-md); }
.history-list { max-height: 320px; overflow-y: auto; }
.history-list::-webkit-scrollbar { width: 4px; }
.history-list::-webkit-scrollbar-track { background: transparent; }
.history-list::-webkit-scrollbar-thumb { background: rgba(255,255,255,.1); border-radius: 2px; }
.history-item {
  padding: 10px 12px; border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,.05);
  margin-bottom: 6px; cursor: pointer;
  transition: background var(--transition-fast);
}
.history-item:hover { background: rgba(255,255,255,.04); }
.history-item .h-date { font-size: var(--font-size-sm); color: var(--text-muted); }
.history-item .h-score { font-size: var(--font-size-base); font-weight: 600; color: var(--accent-light); }
.history-item .h-level { font-size: var(--font-size-sm); color: var(--text-dim); }


.modal-overlay {
  position: fixed; inset: 0; z-index: var(--z-modal);
  background: rgba(0,0,0,.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  animation: fadeIn var(--transition-fast) ease;
}
.modal-content {
  background: linear-gradient(180deg, var(--bg-1), var(--bg-2));
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  max-width: 480px; width: 90%; max-height: 80vh;
  overflow-y: auto; animation: scaleIn var(--transition-base) ease;
  box-shadow: var(--shadow-lg);
}
.modal-content h3 { font-size: 18px; font-weight: 700; color: var(--accent-light); margin-bottom: var(--space-md); }
.modal-close {
  float: right; background: none; border: none;
  color: var(--text-dim); font-size: 20px; cursor: pointer;
  padding: 4px; line-height: 1;
}


.calendar-grid {
  display: grid; grid-template-columns: repeat(7, 1fr);
  gap: 4px; margin: var(--space-md) 0;
}
.calendar-grid .day {
  aspect-ratio: 1; display: flex;
  align-items: center; justify-content: center;
  border-radius: var(--radius-sm); font-size: 13px;
  background: rgba(255,255,255,.03);
  cursor: pointer; transition: var(--transition-fast);
}
.calendar-grid .day:hover { background: rgba(192,132,252,.1); }
.calendar-grid .day.has-data { background: rgba(192,132,252,.2); }
.calendar-grid .day.today { border: 1px solid var(--accent); }
.calendar-grid .day-header { font-size: var(--font-size-sm); color: var(--text-muted); font-weight: 600; }


.tag {
  display: inline-block; padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 10px; font-weight: 500;
}
.tag-ai { background: rgba(124,58,237,.15); color: var(--accent-light); }
.tag-scale { background: rgba(129,140,248,.15); color: var(--info); }
.tag-interactive { background: rgba(34,197,94,.15); color: var(--success); }
.tag-complex { background: rgba(234,179,8,.15); color: var(--warning); }
.tag-popular { background: rgba(249,115,22,.15); color: #f97316; }


.tool-link {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--accent-light); text-decoration: none;
  font-size: 13px; padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}
.tool-link:hover { background: rgba(192,132,252,.1); }


.error-state {
  text-align: center; padding: 30px 20px;
  color: var(--danger);
}
.error-state .emoji { font-size: 40px; display: block; margin-bottom: 12px; }
.error-state p { font-size: var(--font-size-base); }
.error-state .sub { font-size: var(--font-size-sm); color: var(--text-dim); margin-top: 6px; }


.empty-state {
  text-align: center; padding: 30px 20px;
  color: var(--text-dim);
}
.empty-state .emoji { font-size: 36px; display: block; margin-bottom: 8px; }


.streak-badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 12px; border-radius: var(--radius-full);
  background: rgba(249,115,22,.12);
  color: #f97316; font-size: 13px; font-weight: 600;
}
.streak-badge .num { font-size: 18px; font-weight: 800; }


.back-to-top {
  position: fixed; bottom: 24px; right: 24px;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--accent); color: #fff;
  border: none; cursor: pointer; font-size: 18px;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
  z-index: 50; display: none;
}
.back-to-top.show { display: flex; align-items: center; justify-content: center; }
.back-to-top:hover { transform: translateY(-3px); box-shadow: var(--shadow-accent); }


@media (max-width: 640px) {
  .container { padding: 16px 12px 40px; }
  h1 { font-size: 22px; }
  .row > * { min-width: 100%; }
  .chip { font-size: var(--font-size-sm); padding: 6px 12px; }
  .radio-row label { padding: 10px 14px; font-size: 13px; flex: 1; }
  .card { padding: 16px; }
  .score-display .sv { font-size: 40px; }
  .recommend-grid { grid-template-columns: repeat(2, 1fr); }
  .action-bar .btn-sm { flex: 1; }
}

@media (max-width: 400px) {
  .recommend-grid { grid-template-columns: 1fr 1fr; }
  .calendar-grid .day { font-size: 11px; }
}