$css = @'
/* css/tokens.css - Hackera Online design tokens */
:root {
  /* Brand: orange (same in both themes) */
  --color-accent: #ff5a1f;
  --color-accent-hover: #d6440e;
  --color-accent-light: #ff8a65;
  --color-accent-icon: #ff7f36;
  --color-accent-label: #d6440e;
  --color-on-accent: #ffffff;
  --gradient-accent: linear-gradient(135deg, #ff5a1f 0%, #d6440e 100%);
  --gradient-accent-text: linear-gradient(90deg, #ff8a65 0%, #ff5a1f 100%);
  --glow-accent: radial-gradient(circle at center, rgba(255, 90, 31, 0.35) 0%, transparent 70%);

  /* Light theme (default) */
  --bg: #f7f6f2;
  --surface: #ffffff;
  --surface-2: #fafaf8;
  --surface-header: #ffffff;
  --hero-tint: #fff1ea;
  --grid-line: rgba(0, 0, 0, 0.04);
  --text: #0b0b0c;
  --text-muted: #6b6a67;
  --border: #111111;                 /* контурът на картите и бутоните */
  --border-soft: #e4e1d8;            /* разделителни линии на секции */
  --focus-ring: 0 0 0 3px rgba(255, 90, 31, 0.45);

  /* Статуси */
  --color-success: #10b981;
  --color-danger: #ef4444;
  --color-warning: #f59e0b;
  --color-info: #3b82f6;

  /* Fonts */
  --font-sans: 'Poppins', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: ui-monospace, 'JetBrains Mono', SFMono-Regular, Menlo, Consolas, monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: clamp(1.5rem, 1.2rem + 1vw, 1.875rem);
  --text-3xl: clamp(1.875rem, 1.4rem + 2vw, 2.5rem);
  --text-hero: clamp(2.25rem, 1.2rem + 4.5vw, 4rem);
  --leading-tight: 1.1;
  --leading-normal: 1.6;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* Geometry */
  --container-max: 1200px;
  --container-pad: clamp(1rem, 4vw, 2rem);
  --radius-sm: 12px;
  --radius-icon: 14px;
  --radius-card: 20px;
  --radius-pill: 9999px;

  /* Shadows and motion */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-accent: 0 8px 24px rgba(255, 90, 31, 0.35);
  --transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;

  --z-header: 100;
  --z-modal: 1000;
}

/* Dark theme: hero, header, agent */
.theme-dark {
  --bg: #0b0b0c;
  --surface: #232324;
  --surface-2: #2d2d2e;
  --surface-header: #161617;
  --hero-tint: #24130e;
  --text: #ffffff;
  --text-muted: #a1a1a6;
  --border: rgba(255, 255, 255, 0.28);
  --border-soft: rgba(255, 255, 255, 0.12);
  --grid-line: rgba(255, 255, 255, 0.04);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45);
  background: var(--bg);
  color: var(--text);
}

@media (prefers-reduced-motion: reduce) {
  :root { --transition: none; }
}