:root{--primary-color: #3498db;--secondary-color: #2ecc71;--background-color: #ecf0f1;--background-color-secondary: #bdc3c7;--border-color: #95a5a6;--shadow-color: rgba(0, 0, 0, .2);--text-color: #3d3d3d}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}button{border:none;background:linear-gradient(135deg,#2980b9,#3498db);color:#fff;padding:8px 14px;border-radius:10px;font-weight:500;cursor:pointer;transition:background .15s,filter .15s;box-shadow:0 2px 6px var(--shadow-color);font-family:inherit}button:disabled{background:var(--border-color);color:#888;cursor:not-allowed;box-shadow:none;transform:none;opacity:.6}button:disabled:hover{background:var(--border-color);transform:none;box-shadow:none}button:hover{background:linear-gradient(135deg,#3498db,#5dade2);filter:brightness(1.04);transform:none;box-shadow:0 0 0 var(--shadow-color)}button.danger{background:linear-gradient(135deg,#c62828,#e53935)}.settings-section{margin-top:12px}.settings-section:not(:first-child){position:relative;padding-top:12px}.settings-section:not(:first-child):before{content:"";position:absolute;left:-5px;right:-5px;top:0;height:1px;background:var(--border-color);pointer-events:none}.section-title{font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:#555;margin:-10px 0 5px;padding:4px 2px}.settings-row{display:grid;grid-template-columns:1fr auto;align-items:center;gap:10px;margin:8px 0}.row-label{color:var(--text-color);opacity:.9}.button-group{display:flex;gap:8px}