:root{--color-primary: #111;--color-bg: #fff;--color-bg-subtle: #fafafa;--color-text: #111;--color-text-secondary: #555;--color-text-muted: #666;--color-text-faint: #888;--color-text-ghost: #aaa;--color-border: #eee;--color-border-strong: #ddd;--color-accent: #2563eb;--color-accent-hover: #1d4ed8;--color-error: #c00;--color-success: #2e7d32;--color-success-bg: #e8f5e9;--color-warning: #e65100;--color-warning-bg: #fff3e0;--font-sans: "Inter", system-ui, -apple-system, sans-serif;--font-mono: "SF Mono", "Fira Code", "Cascadia Code", monospace;--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 12px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .06);--shadow-md: 0 2px 16px rgba(0, 0, 0, .06)}*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:var(--font-sans);color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 16px;border:none;border-radius:var(--radius-md);background:var(--color-primary);color:#fff;font-family:var(--font-sans);font-size:14px;font-weight:600;cursor:pointer;transition:background .15s,opacity .15s;text-decoration:none}.btn:hover{background:#333}.btn:disabled{opacity:.5;cursor:not-allowed}.btn:disabled:hover{background:var(--color-primary)}.btn-secondary{background:var(--color-bg);color:var(--color-text);border:1px solid var(--color-border-strong)}.btn-secondary:hover{background:var(--color-bg-subtle)}.btn-secondary:disabled:hover{background:var(--color-bg)}.btn-ghost{background:none;color:var(--color-text-muted);padding:6px 10px}.btn-ghost:hover{background:var(--color-bg-subtle);color:var(--color-text)}.btn-ghost:disabled:hover{background:none;color:var(--color-text-muted)}.btn-danger{background:none;color:var(--color-error);border:1px solid var(--color-border-strong)}.btn-danger:hover{background:#fef2f2}.btn-danger:disabled:hover{background:none}.input{display:block;width:100%;padding:10px 12px;border:1px solid var(--color-border-strong);border-radius:var(--radius-md);font-family:var(--font-sans);font-size:14px;color:var(--color-text);background:var(--color-bg);transition:border-color .15s}.input:focus{border-color:var(--color-accent);outline:none}.input::placeholder{color:var(--color-text-ghost)}textarea.input{resize:vertical;min-height:80px}.card-interactive{transition:background .15s,border-color .15s;cursor:pointer}.card-interactive:hover{background:var(--color-bg-subtle);border-color:var(--color-border-strong)}a{color:var(--color-accent);text-decoration:none}a:hover{text-decoration:underline}