:root{--background:#f5f5f5;--surface:#ffffff;--surface-strong:#ffffff;--text:#111111;--muted:#6b6b6b;--border:#e5e5e5;--primary:#111111;--primary-dark:#111111;--success:#1f7a53;--danger:#b1362e;--shadow:0 8px 24px rgba(17,17,17,0.06)}*{box-sizing:border-box}html{font-size:16px}body{margin:0;min-height:100vh;background:var(--background);color:var(--text);font-family:Arial,Helvetica,sans-serif}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.page-shell{min-height:100vh;padding:24px}.card{background:var(--surface);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow)}.button{border:1px solid transparent;border-radius:10px;padding:12px 16px;cursor:pointer;transition:background .2s ease,border-color .2s ease,opacity .2s ease}.button:disabled{cursor:not-allowed;opacity:.7}.button-primary{background:var(--primary);color:#ffffff}.button-secondary{background:#ffffff;color:var(--text);border-color:var(--border)}.button-danger{background:#fff5f4;color:var(--danger);border-color:#f2d4d1}.input,.select,.textarea{width:100%;border:1px solid var(--border);border-radius:10px;padding:12px 14px;background:var(--surface-strong);color:var(--text)}.input:focus,.select:focus,.textarea:focus{outline:none;border-color:#bdbdbd}.textarea{min-height:110px;resize:vertical}.form-grid{display:grid;grid-gap:14px;gap:14px}.muted{color:var(--muted)}.auth-shell{min-height:100vh;display:grid;place-items:center;padding:24px}.auth-card{width:100%;max-width:420px}.toast-stack{position:fixed;top:20px;right:20px;display:grid;grid-gap:10px;gap:10px;z-index:50}.toast{padding:12px 16px;border-radius:12px;color:white;box-shadow:var(--shadow)}.toast-success{background:var(--success)}.toast-error{background:var(--danger)}.task-layout{display:grid;grid-template-columns:minmax(0,320px) minmax(0,1fr);grid-gap:20px;gap:20px}.filters-grid{display:grid;grid-template-columns:minmax(0,1fr) 160px;grid-gap:12px;gap:12px;margin-bottom:20px}@media (max-width:900px){.task-layout{grid-template-columns:1fr}}@media (max-width:640px){.auth-shell,.page-shell{padding:16px}.filters-grid{grid-template-columns:1fr}}