.st-pro-wrapper{max-width:300px;margin:20px auto;background:#fff;border-radius:25px;padding:25px;box-shadow:0 15px 35px rgba(0,0,0,.1);text-align:center;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}.st-timer-box{position:relative;width:200px;height:200px;margin:0 auto 20px}.st-ring{transform:rotate(-90deg)}.st-ring-progress{transition:stroke-dashoffset .3s linear;stroke-dasharray:565.48;stroke-dashoffset:0}.st-display{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:2.5rem;font-weight:700;color:#333}.st-presets,.st-main-controls,.st-custom-row{display:flex;justify-content:center;gap:8px;margin-bottom:15px}.st-pro-wrapper button{border:none;padding:8px 12px;border-radius:8px;cursor:pointer;font-size:14px;transition:transform .2s,opacity .2s;background:#f0f0f0;color:#444}.st-pro-wrapper button:hover{transform:scale(1.05);opacity:.8}.st-btn-start{background:var(--accent-color) !important;color:#fff !important}.st-btn-set{background:#333 !important;color:#fff !important}.st-custom-val{width:60px;border:1px solid #ddd;border-radius:8px;padding:5px;text-align:center}