:root,:root[data-theme=midnight]{--bg:#0f1219;--text:#dde3ee;--toolbar-bg:#171c26;--border:#2a3242;--accent:#5b9cff;--page-bg:#1b2130;--selection:#2c4a7a}:root[data-theme=graphite]{--bg:#1a1a1c;--text:#d8d8d8;--toolbar-bg:#232326;--border:#3a3a3e;--accent:#9aa4b2;--page-bg:#27272a;--selection:#44444a}:root[data-theme=sepia-dark]{--bg:#201a12;--text:#e6d8bd;--toolbar-bg:#2a2318;--border:#453a26;--accent:#d2a95c;--page-bg:#2e2718;--selection:#5a4a28}:root[data-theme=solarized-dark]{--bg:#002b36;--text:#93a1a1;--toolbar-bg:#073642;--border:#0e4956;--accent:#b58900;--page-bg:#073642;--selection:#274642}:root[data-theme=high-contrast]{--bg:#000;--text:#fff;--toolbar-bg:#000;--border:#fff;--accent:#ff0;--page-bg:#111;--selection:#0050d0}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:system-ui,sans-serif}::selection{background:var(--selection)}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.app-header{z-index:2;background:var(--toolbar-bg);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:1rem;padding:.5rem 1rem;display:flex;position:sticky;top:0}.app-header h1{margin:0;font-size:1.25rem}button,select,input[type=file],input[type=number]{font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:4px;padding:.3rem .55rem;font-size:.85rem}button:hover:not(:disabled){border-color:var(--accent);cursor:pointer}button:disabled{opacity:.45}input[type=range],input[type=checkbox]{accent-color:var(--accent)}.app-layout{align-items:stretch;min-height:calc(100vh - 3rem);display:flex}.reader{flex-direction:column;flex:1;align-items:center;gap:.75rem;min-width:0;padding:1rem;display:flex}#reader-status{margin:0;font-size:.9rem}.canvas-row{flex:1;justify-content:center;align-items:stretch;gap:.5rem;width:100%;min-height:0;display:flex}.page-arrow{flex:none;align-self:center;padding:1.2rem .55rem;font-size:1.6rem;line-height:1}.canvas-container{justify-content:safe center;align-items:flex-start;min-width:0;display:flex;overflow:auto}.canvas-container canvas{background:var(--page-bg);box-shadow:0 4px 24px #00000080}.controls-panel{background:var(--toolbar-bg);border-left:1px solid var(--border);flex-direction:column;flex:0 0 260px;gap:1rem;padding:1rem;display:flex;overflow-y:auto}.controls-panel[hidden]{display:none}.panel-group{border-bottom:1px solid var(--border);flex-direction:column;gap:.4rem;padding-bottom:.9rem;display:flex}.panel-group:last-child{border-bottom:none}.panel-heading,.controls-panel label{font-size:.85rem}.panel-heading{font-weight:600}.panel-row{align-items:center;gap:.4rem;display:flex}.controls-panel input[type=number]{width:4.5rem}.controls-panel input[type=file]{max-width:100%}#zoom-label{text-align:center;font-variant-numeric:tabular-nums;min-width:3.2rem}@media (width<=768px){.controls-panel{z-index:1;width:min(280px,85vw);position:fixed;top:3rem;bottom:0;right:0;box-shadow:-8px 0 24px #0006}}