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var(--line);border-radius:999px;color:var(--muted);display:inline-flex;height:34px;justify-content:center;min-height:34px;padding:0;position:absolute;right:16px;top:16px;width:34px}.access-close-button:hover{background:#fff;color:var(--teal)}.access-icon{align-items:center;background:#256f611a;border-radius:8px;color:var(--teal);display:flex;height:48px;justify-content:center;width:48px}.access-copy{display:grid;gap:6px}.access-copy h2{font-size:24px;letter-spacing:0;line-height:1.16;margin:0}.access-copy p{color:var(--muted);line-height:1.5;margin:0}.access-form,.access-loading,.access-limits{display:grid;gap:10px}.auth-mode-toggle{background:var(--surface-2);border:1px solid var(--line);border-radius:8px;display:grid;gap:4px;grid-template-columns:repeat(2,minmax(0,1fr));padding:4px}.auth-mode-toggle button{background:transparent;border:0;border-radius:6px;color:var(--muted);font-weight:800;min-height:36px;padding:8px 10px}.auth-mode-toggle button.active{background:#fff;color:var(--teal);box-shadow:0 1px 2px #10182814}.google-auth-button{align-items:center;background:#fff;border:1px solid var(--line);color:var(--ink);display:inline-flex;gap:10px;justify-content:center;min-height:42px;width:100%}.google-auth-button:hover{background:var(--surface-2);color:var(--teal)}.google-mark{align-items:center;border:1px solid var(--line-strong);border-radius:999px;display:inline-flex;font-size:14px;font-weight:900;height:24px;justify-content:center;width:24px}.auth-divider{align-items:center;color:var(--muted);display:grid;font-size:12px;gap:10px;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);line-height:1;margin:2px 0}.auth-divider:before,.auth-divider:after{background:var(--line);content:"";height:1px}.access-loading{align-items:center;color:var(--muted);grid-template-columns:auto 1fr}.access-error{background:#f8e9e7;border:1px solid #edc8c3;border-radius:6px;color:var(--red);font-size:14px;line-height:1.4;padding:10px 12px}.access-limits{border-top:1px solid var(--line);color:var(--muted);font-size:13px;padding-top:14px}.sidebar{display:grid;gap:16px}.tool-panel,.workspace{background:var(--surface);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow)}.tool-panel{padding:16px}.study-material-panel{scroll-margin-top:18px;transition:background .2s ease,border-color .2s ease,box-shadow .2s ease}.study-material-panel.is-highlighted{background:#fbfdfc;border-color:var(--teal);box-shadow:0 0 0 3px #256f6124,var(--shadow)}.study-material-panel.is-highlighted .file-picker{background:#256f610f;border-color:var(--teal);color:var(--teal)}.panel-heading{align-items:center;color:var(--teal);display:flex;gap:9px;margin-bottom:14px}.panel-heading.compact{margin-bottom:0}.panel-heading h2{color:var(--ink);font-size:17px;line-height:1.2;margin:0}.panel-helper{color:var(--muted);font-size:13px;line-height:1.45;margin:-4px 0 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span{display:block;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-picker svg{flex:0 0 auto}.upload-success-card{align-items:center;background:#256f6114;border:1px solid rgba(37,111,97,.24);border-radius:6px;color:var(--teal);display:flex;gap:10px;min-height:118px;padding:14px}.upload-success-card svg{flex:0 0 auto}.upload-success-card strong,.upload-success-card span{display:block}.upload-success-card strong{color:var(--ink);font-size:14px}.upload-success-card span{color:var(--muted);font-size:13px;margin-top:4px}.source-footer{align-items:center;display:flex;gap:10px;justify-content:space-between;margin-top:12px}.source-footer span{color:var(--muted);font-size:13px}button:not(.icon-button):not(.session-open):not(.session-favorite):not(.session-delete):not(.clear-sessions-button):not(.sign-out-button):not(.tabs button):not(.secondary-button):not(.choice-button):not(.auth-mode-toggle button):not(.legal-toggle button):not(.access-close-button):not(.google-auth-button):not(.account-avatar-button):not(.account-menu-item):not(.favorite-current-button):not(.favorite-row-main):not(.favorite-list-action):not(.marketing-footer-link){background:var(--teal);color:#fff}button:not(.icon-button):not(.session-open):not(.session-favorite):not(.session-delete):not(.clear-sessions-button):not(.sign-out-button):not(.tabs button):not(.secondary-button):not(.choice-button):not(.auth-mode-toggle button):not(.legal-toggle button):not(.access-close-button):not(.google-auth-button):not(.account-avatar-button):not(.account-menu-item):not(.favorite-current-button):not(.favorite-row-main):not(.favorite-list-action):not(.marketing-footer-link):hover{background:var(--teal-dark)}.secondary-button{background:#edf3f1;color:var(--teal)}.secondary-button:hover{background:#e3ece9}.upload-box 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28px;min-height:64px;padding:8px;width:100%}.session-row:hover,.session-row.active{background:var(--surface-2);border-color:#256f6152}.session-open{align-items:flex-start;background:transparent;color:var(--ink);display:grid;gap:4px;justify-items:start;min-height:48px;min-width:0;padding:4px 2px;text-align:left;width:100%}.session-open:hover{background:transparent}.session-favorite,.session-delete{align-self:start;background:transparent;border-radius:5px;color:var(--muted);min-height:28px;padding:0;width:28px}.session-favorite:hover,.session-favorite.active{background:#aa74201f;color:var(--amber)}.session-delete:hover{background:#ad463a1a;color:var(--red)}.modal-backdrop{align-items:center;background:#1118278f;display:flex;inset:0;justify-content:center;padding:24px;position:fixed;z-index:1000}.confirm-dialog{background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 24px 80px 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