:root{--accent:#1a1a1a;--accent-contrast:#fff;--bg:#f6f6f7;--surface:#fff;--text:#1a1a1a;--text-mute:#6b6b70;--border:#e7e7ea;--radius:14px;--shadow:0 1px 2px rgba(0,0,0,.04),0 8px 24px rgba(0,0,0,.06);--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}body,html{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased;line-height:1.5}a{color:inherit}button{font-family:inherit}.bk-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;border-radius:10px;border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:filter .15s,opacity .15s}.bk-btn--primary{background:var(--accent);color:var(--accent-contrast)}.bk-btn--primary:hover{filter:brightness(1.06)}.bk-btn--ghost{background:transparent;border-color:var(--border);color:var(--text)}.bk-btn--ghost:hover{background:#00000008}.bk-btn:disabled{opacity:.5;cursor:not-allowed}.bk-field{display:flex;flex-direction:column;gap:6px}.bk-label{font-size:12px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--text-mute)}.bk-input{height:44px;padding:0 14px;border:1px solid var(--border);border-radius:10px;background:var(--surface);font-size:15px;color:var(--text);width:100%}.bk-input:focus{outline:2px solid var(--accent);outline-offset:0;border-color:transparent}textarea.bk-input{height:auto;padding:12px 14px;resize:vertical;min-height:84px}