/* Design tokens — the single palette/scale definition for the whole site. Everything else (base, layout, components, sections) only ever reads these custom properties; it never hardcodes a color, radius or shadow. Swap a value here and it updates everywhere. */ :root { /* ---- Color primitives ---- */ --blue-50: #eff6ff; --blue-100: #dbeafe; --blue-200: #bfdbfe; --blue-300: #93c5fd; --blue-400: #60a5fa; --blue-500: #3b82f6; --blue-600: #2563eb; --blue-700: #1d4ed8; --blue-800: #1e40af; --blue-900: #1e3a8a; --slate-50: #f8fafc; --slate-100: #f1f5f9; --slate-200: #e2e8f0; --slate-300: #cbd5e1; --slate-400: #94a3b8; --slate-500: #64748b; --slate-600: #475569; --slate-700: #334155; --slate-800: #1e293b; --slate-900: #0f172a; --slate-950: #0a0f1c; --white: #ffffff; --success-500: #16a34a; /* ---- Semantic tokens (light theme, default) ---- */ --color-bg: #fafafa; --color-bg-elevated: var(--white); --color-bg-subtle: var(--slate-50); --color-border: var(--slate-200); --color-border-strong: var(--slate-300); --color-text: var(--slate-900); --color-text-muted: var(--slate-600); --color-text-subtle: var(--slate-500); --color-text-on-accent: var(--white); --color-accent: var(--blue-600); --color-accent-strong: var(--blue-700); --color-accent-soft: var(--blue-50); --color-accent-soft-border: var(--blue-100); --color-focus-ring: var(--blue-500); --color-overlay: rgb(15 23 42 / 6%); /* ---- Typography ---- System-first stack: reads like Inter (Inter was designed to match system UI metrics) with zero font-download cost — no @font-face, no render-blocking request, best possible CLS/Lighthouse score. */ --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", Roboto, "Helvetica Neue", Arial, sans-serif; --text-xs: 0.75rem; --text-sm: 0.875rem; --text-base: 1rem; --text-lg: 1.125rem; --text-xl: 1.25rem; --text-2xl: 1.5rem; --text-3xl: 1.875rem; --text-4xl: 2.25rem; --text-5xl: 3rem; --text-6xl: 3.75rem; --leading-tight: 1.15; --leading-snug: 1.35; --leading-normal: 1.6; /* ---- Spacing scale ---- */ --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem; --space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem; --space-12: 3rem; --space-16: 4rem; --space-20: 5rem; --space-24: 6rem; /* ---- Radius ---- */ --radius-sm: 8px; --radius-md: 12px; --radius-lg: 16px; --radius-xl: 20px; --radius-full: 999px; /* ---- Shadow (soft, low-opacity — no heavy drop shadows) ---- */ --shadow-sm: 0 1px 2px rgb(15 23 42 / 4%); --shadow-md: 0 4px 16px -4px rgb(15 23 42 / 8%), 0 2px 6px -2px rgb(15 23 42 / 6%); --shadow-lg: 0 16px 40px -12px rgb(15 23 42 / 14%), 0 4px 12px -4px rgb(15 23 42 / 8%); /* ---- Motion ---- */ --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1); --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1); /* ---- Layout ---- */ --container-max: 1200px; --header-height: 72px; } /* ---- Dark theme overrides ---- Applied via [data-theme="dark"] on (set by assets/js/theme.js). Same token names, different values — nothing downstream needs to know which theme is active. */ :root[data-theme="dark"] { --color-bg: var(--slate-950); --color-bg-elevated: #111827; --color-bg-subtle: #0f172a; --color-border: #1f2937; --color-border-strong: #2d3b4e; --color-text: var(--slate-50); --color-text-muted: var(--slate-300); --color-text-subtle: var(--slate-400); --color-text-on-accent: var(--white); --color-accent: var(--blue-400); --color-accent-strong: var(--blue-500); --color-accent-soft: rgb(59 130 246 / 12%); --color-accent-soft-border: rgb(59 130 246 / 24%); --color-overlay: rgb(0 0 0 / 30%); --shadow-sm: 0 1px 2px rgb(0 0 0 / 20%); --shadow-md: 0 4px 16px -4px rgb(0 0 0 / 32%), 0 2px 6px -2px rgb(0 0 0 / 24%); --shadow-lg: 0 16px 40px -12px rgb(0 0 0 / 45%), 0 4px 12px -4px rgb(0 0 0 / 30%); } @media (prefers-reduced-motion: reduce) { :root { --transition-base: 1ms; --transition-fast: 1ms; } }