:root {
  --bg: #f5f7fa;
  --surface: #ffffff;
  --surface-variant: #f8f9fb;
  --on-surface: #212121;
  --on-surface-secondary: #757575;
  --divider: #eeeeee;
  --grey-100: #f5f5f5;
  --grey-900: #111;

  --primary-50: #e3f2fd;
  --primary-100: #bbdefb;
  --primary-500: #1976d2;
  --primary-600: #1565c0;

  --success-50: #e8f5e9;
  --success-500: #2e7d32;
  --success-600: #1b5e20;

  --warning-50: #fff8e1;
  --warning-500: #ed6c02;
  --warning-600: #bf360c;

  --error-50: #fbe9e7;
  --error-500: #d32f2f;
  --error-600: #c62828;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  --elevation-1: 0 2px 4px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --elevation-3: 0 6px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.06);

  --font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Menlo', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; color-scheme: light; }
body {
  font-family: var(--font-family); background: var(--bg);
  color: var(--on-surface); line-height: 1.5; min-height: 100vh;
}
a { color: var(--primary-500); text-decoration: none; }
a:hover { color: var(--primary-600); }

.cw-card {
  background: var(--surface); border: 1px solid var(--divider);
  border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--elevation-1);
}
.cw-card h1 { font-size: 1.375rem; font-weight: 700; margin-bottom: 8px; color: var(--on-surface); }
.cw-caption { font-size: 0.8125rem; color: var(--on-surface-secondary); margin-bottom: 16px; }

.cw-field {
  display: block; margin-bottom: 16px;
}
.cw-field span {
  display: block; font-size: 0.8125rem; font-weight: 600;
  color: var(--on-surface); margin-bottom: 6px;
}
.cw-field input, .cw-field textarea, .cw-field select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--divider);
  border-radius: var(--radius-md); background: var(--surface);
  font-family: inherit; font-size: 1rem; color: var(--on-surface);
  -webkit-appearance: none; appearance: none;
}
.cw-field textarea { min-height: 100px; resize: vertical; }
.cw-field input:focus, .cw-field textarea:focus, .cw-field select:focus {
  outline: none; border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.15);
}

.cw-btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px; padding: 12px 18px; font-family: inherit;
  font-size: 0.9375rem; font-weight: 600; border: 1px solid transparent;
  border-radius: var(--radius-md); cursor: pointer;
  text-decoration: none; transition: background .15s, border-color .15s;
}
.cw-btn-primary { background: var(--primary-500); color: #fff; }
.cw-btn-primary:active { background: var(--primary-600); }
.cw-btn-primary:disabled { opacity: .55; cursor: not-allowed; }
.cw-btn-secondary {
  background: transparent; color: var(--primary-500);
  border-color: var(--primary-500);
}
.cw-btn-secondary:active { background: var(--primary-50); }
.cw-btn-block { width: 100%; }

.cw-icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 50%;
  background: transparent; color: var(--on-surface);
  border: none; cursor: pointer; text-decoration: none;
}
.cw-icon-btn:active { background: var(--surface-variant); }
.cw-icon-btn.danger { color: var(--error-500); }
.cw-icon-btn.active { background: var(--surface-variant); }
.cw-icon-btn i { font-size: 20px; }

.cw-alert {
  padding: 12px 14px; border-radius: var(--radius-md);
  font-size: 0.875rem; margin-top: 14px; border: 1px solid transparent;
}
.cw-alert-error {
  background: var(--error-50); color: var(--error-600);
  border-color: #ffcdd2;
}

.spin { display: inline-block; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }