:root{--color-bg: #ffffff;--color-surface: #ffffff;--color-text: #000000;--color-text-heading: #000000;--color-primary: #000000;--color-primary-hover: #333333;--color-border: #e5e5e5;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--spacing-xs: .5rem;--spacing-sm: 1rem;--spacing-md: 2rem;--spacing-lg: 4rem;--radius-md: 12px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--transition-smooth: .3s cubic-bezier(.4, 0, .2, 1)}@media(prefers-color-scheme:dark){html:not([data-theme]){--color-bg: #0a0a0a;--color-surface: #1a1a1a;--color-text: #e5e5e5;--color-text-heading: #ffffff;--color-primary: #ffffff;--color-primary-hover: #cccccc;--color-border: #333333}}[data-theme=light]{--color-bg: #f6f6f6;--color-surface: #ffffff;--color-text: #181818;--color-text-heading: #000000;--color-primary: #000000;--color-primary-hover: #333333;--color-border: #e5e5e5}[data-theme=dark]{--color-bg: #1e1f22;--color-surface: #212126;--color-text: #dcdada;--color-text-heading: #ffffff;--color-primary: #ffffff;--color-primary-hover: #cccccc;--color-border: #333333}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--color-bg);color:var(--color-text);line-height:1.6;transition:background-color var(--transition-smooth),color var(--transition-smooth)}a{color:var(--color-primary);text-decoration:none;font-weight:500;transition:color .2s}a:hover{color:var(--color-primary-hover)}h1,h2,h3,h4,h5,h6{color:var(--color-text-heading);font-weight:700;line-height:1.2;margin-bottom:var(--spacing-sm)}h1{font-size:2.5rem;letter-spacing:-.02em}h2{font-size:1.75rem;letter-spacing:-.01em}.container{max-width:900px;margin:0 auto;padding:0 var(--spacing-sm)}.card{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--spacing-md);box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s}.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.fade-in{animation:fadeIn .6s ease-out forwards}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}