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112px);transform:translateX(-50%);max-width:min(90vw,500px);padding:12px 20px;background:var(--surface3);border:1px solid var(--line);border-radius:12px;font-size:14px;z-index:100;box-shadow:0 12px 40px #0004}#toast:empty{display:none}dialog{background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:20px;padding:32px;max-width:460px;width:calc(100% - 40px);box-shadow:var(--shadow)}dialog::backdrop{background:#0009;backdrop-filter:blur(5px)}dialog p{font-size:15px;line-height:1.9;margin-top:15px}.dialog-close{float:right;margin:-14px -14px 0 12px}.dialog-actions{display:flex;justify-content:end;gap:10px;margin-top:26px}
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@media(max-width:360px){.sidebar nav a span{display:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}

@media(max-width:620px){#history .page-heading{flex-direction:column}#history .page-heading button{display:inline-flex}}

.sidebar{overflow-y:auto}.sidebar nav{flex-shrink:0}.side-note{flex-shrink:0}
@media(max-width:620px){input[type=date],input[type=number],input[type=month],input[type=search],select,textarea{font-size:16px}.daily-goal select{font-size:16px;width:130px}.sidebar{overflow-y:visible}}
@media(min-width:1600px){#study-shell #main{max-width:none}.today-grid{grid-template-columns:minmax(0,1fr) minmax(360px,520px)}}
.guest-notice{background:var(--aura);border-color:color-mix(in srgb,var(--accent) 25%,transparent);color:var(--muted);display:flex;align-items:center;justify-content:space-between;gap:15px}.guest-notice button{white-space:nowrap;min-height:36px}
@media(max-width:620px){.guest-notice{font-size:14px;align-items:start;flex-wrap:wrap}.guest-notice button{font-size:14px}}