:root{--bottom-nav-height:64px;--palette-height:72px}*{box-sizing:border-box}body,html{margin:0;padding:0;width:100%;height:100%;overflow-x:hidden;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:#f8fafc;touch-action:manipulation}.desktop-navbar{display:flex}@media (max-width:768px){.desktop-navbar{display:none!important}}.mobile-nav{display:none}@media (max-width:768px){.mobile-nav{position:fixed;bottom:0;left:0;right:0;height:calc(var(--bottom-nav-height) + var(--safe-bottom));padding-bottom:var(--safe-bottom);background:#fff;border-top:1px solid #e5e7eb;justify-content:space-around;z-index:1000;box-shadow:0 -6px 16px rgba(0,0,0,.06)}.mobile-nav,.mobile-tab{display:flex;align-items:center}.mobile-tab{flex:1 1;border:none;background:none;flex-direction:column;justify-content:center;gap:3px;font-size:12px;font-weight:500;color:#9ca3af;cursor:pointer;-webkit-tap-highlight-color:transparent}.mobile-tab svg{width:24px;height:24px;stroke-width:1.8}.mobile-tab.active{color:#2563eb;font-weight:600}.mobile-tab.active svg{stroke-width:2.4}}.dashboard-card{display:flex;flex-direction:column}.dashboard-card .card-content{flex:1 1}.dashboard-card .card-action{margin-top:auto}.dashboard-card .btn-primary{width:100%;padding:12px 16px;border-radius:12px;font-size:15px;font-weight:600;background:#2563eb;color:#fff;border:none}.rc-mobile-root{height:100vh;display:flex;flex-direction:column;background:#f5f7fb;position:relative;z-index:1}.rc-header{position:-webkit-sticky;position:sticky;top:0;z-index:100;height:56px;background:#fff;border-bottom:1px solid #e5e7eb;display:flex;align-items:center;justify-content:space-between;padding:0 16px;font-weight:600}.rc-timer{color:#ef4444;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.rc-content{flex:1 1;overflow-y:auto;padding:12px;padding-bottom:calc(var(--palette-height) + var(--bottom-nav-height) + var(--safe-bottom) + 16px);position:relative;z-index:1}.rc-passage{margin-bottom:12px;font-size:15px;line-height:1.6;max-height:45vh;overflow-y:auto}.rc-passage,.rc-question{background:#fff;border-radius:14px;padding:16px}.rc-question{position:relative;z-index:10}.rc-question h4{font-size:15px;font-weight:600;margin-bottom:10px}.rc-options{display:flex;flex-direction:column;gap:10px;position:relative;z-index:10}.rc-option{text-align:left;padding:12px;border-radius:10px;border:1px solid #e5e7eb;background:#fff;font-size:14px;cursor:pointer;pointer-events:auto;touch-action:manipulation}.rc-option:active{transform:scale(.98)}.rc-question-palette{margin-top:20px;position:relative;z-index:5}.rc-palette{position:fixed;left:0;right:0;bottom:calc(var(--bottom-nav-height) + var(--safe-bottom));height:var(--palette-height);background:#fff;border-top:1px solid #e5e7eb;display:grid;grid-template-columns:repeat(4,1fr);grid-gap:8px;gap:8px;padding:10px;z-index:1100}.rc-palette button{border-radius:10px;border:none;font-size:13px;font-weight:600;cursor:pointer;pointer-events:auto;touch-action:manipulation}.rc-palette .primary{background:#2563eb;color:#fff}.rc-palette .secondary{background:#e5e7eb;color:#111827}.rc-palette .danger{background:#fee2e2;color:#b91c1c}.mobile-nav,.rc-mobile-root *{pointer-events:auto}:root{--safe-top:env(safe-area-inset-top);--safe-bottom:env(safe-area-inset-bottom)}@media (max-width:768px){body{padding-top:calc(var(--safe-top) + 8px);padding-bottom:calc(var(--safe-bottom) + 72px)}.action-tabs,.page-actions,.top-actions{margin-top:12px!important;padding-top:8px}}