/* Study companion: progressive enhancement of the existing reader shell. */
.tutor-layout{display:grid;grid-template-columns:minmax(0,1fr);align-items:start;gap:0;min-height:0}
.tutor-layout.is-open{grid-template-columns:minmax(0,1fr) 400px}
.tutor-toggle{position:relative;isolation:isolate;background:#0f766e!important;color:white!important;border-color:#0f766e!important;gap:7px}
.tutor-toggle.tutor-attention::after{content:"";position:absolute;inset:-4px;border:2px solid #f59e0b;border-radius:inherit;pointer-events:none;opacity:1;box-shadow:0 0 0 2px #fff,0 0 12px 2px #f59e0b45}
.tutor-toggle.tutor-pulsing::after{animation:tutor-invite 2.4s ease-in-out 2}
.tutor-toggle.tutor-attention-paused::after{animation-play-state:paused}
.tutor-toggle:focus-visible{outline:3px solid #0f766e;outline-offset:5px}
@keyframes tutor-invite{0%,100%{opacity:.35;box-shadow:0 0 0 2px #fff,0 0 4px 0 #f59e0b20}45%,60%{opacity:1;box-shadow:0 0 0 2px #fff,0 0 22px 6px #f59e0b99}}
.tutor-toggle svg{width:18px;height:18px}
.tutor-panel{margin:12px 0 12px 12px;height:calc(100vh - var(--topbar) - 78px);min-height:520px;background:#fff;border:1px solid #cbdedb;border-radius:18px;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 12px 32px -20px #104a4870;direction:rtl;color:#1e293b;font-size:13px}
.tutor-panel[hidden],.tutor-panel [hidden]{display:none!important}
.tutor-panel button,.tutor-dialog button{font:inherit;cursor:pointer;transition:background .15s;color:inherit}
.tutor-panel button:disabled,.tutor-dialog button:disabled{opacity:.5;cursor:wait}
.tutor-panel button:focus-visible,.tutor-panel a:focus-visible,.tutor-panel input:focus-visible,.tutor-panel textarea:focus-visible,.tutor-panel select:focus-visible,.tutor-dialog :focus-visible{outline:3px solid #14b8a6;outline-offset:3px}
.tutor-head{padding:16px 16px 12px;background:linear-gradient(120deg,#ecfdf5,#f1f7ff);border-bottom:1px solid #dbe9e6;display:flex;align-items:center;gap:9px;flex-shrink:0}
.tutor-avatar{width:35px;height:35px;border-radius:12px;background:#0f766e;color:#fff;display:grid;place-items:center;flex-shrink:0}
.tutor-avatar svg{width:23px;height:23px}
.tutor-head-title{flex:1;min-width:0}.tutor-head-title strong{font-size:15px;display:block}.tutor-head-title small{font-size:10px;color:#58746f;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tutor-icon-btn{border:1px solid #d4e3df;background:#ffffffb8;border-radius:10px;width:32px;height:32px;display:grid;place-items:center;flex-shrink:0}.tutor-icon-btn:hover{background:#e0f2ed}.tutor-icon-btn svg{width:17px;height:17px}
.tutor-context{padding:9px 16px;display:flex;align-items:center;gap:8px;border-bottom:1px solid #e8eeed;background:#fcfdfc;font-size:11px;min-height:42px}.tutor-context-title{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;color:#4b635e}.tutor-context button{border:0;background:transparent;color:#0f766e;font-size:10px;white-space:nowrap}
.tutor-tabs{display:flex;border-bottom:1px solid #e2e8f0;padding:0 12px;gap:5px}.tutor-tabs button{flex:1;border:0;border-bottom:2px solid transparent;background:white;padding:10px 4px;font-size:11px;color:#64748b}.tutor-tabs button[aria-selected=true]{border-color:#0f766e;color:#0f766e;font-weight:800}
.tutor-scroll{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;padding:18px 15px;scrollbar-width:thin;scrollbar-color:#c4d6d0 transparent}
.tutor-welcome{padding:20px 3px 12px}.tutor-welcome .tutor-eyebrow{letter-spacing:1.7px;font-size:9px;color:#0f766e;font-family:var(--mono)}.tutor-welcome h2{font-size:23px;line-height:1.7;margin:10px 0;color:#143e39}.tutor-welcome p{font-size:12px;line-height:2;color:#64748b;margin:8px 0 17px}.tutor-starters{display:grid;gap:8px}.tutor-starters button{border:1px solid #dce8e4;border-radius:12px;background:#fafdfc;text-align:right;padding:11px 13px;display:flex;align-items:center;gap:10px;font-size:12px}.tutor-starters button:hover{background:#eef8f4;border-color:#a7cfc2}.tutor-starters span{color:#0f766e;font-size:18px}.tutor-starters small{display:block;font-size:10px;color:#71837e;margin-top:3px}
.tutor-message{padding:12px 13px;border:1px solid #e3eae8;border-radius:14px;margin-bottom:13px;font-size:12px;line-height:2;overflow-wrap:anywhere;background:#fff}.tutor-message.user{background:#edf7f3;border-color:#d8ebe2;margin-inline-start:25px}.tutor-message-label{display:flex;justify-content:space-between;font-size:10px;color:#73847f;gap:8px;margin-bottom:5px}.tutor-message-label b{color:#41645a}.tutor-message-content p{margin:7px 0}.tutor-message-content h1,.tutor-message-content h2,.tutor-message-content h3{font-size:15px;line-height:1.8;margin:13px 0 6px}.tutor-message-content ul,.tutor-message-content ol{padding-inline-start:20px}.tutor-message-content pre{direction:ltr;text-align:left;white-space:pre;overflow:auto;background:#102425;color:#e3f7ee;border-radius:10px;padding:13px;margin:9px 0;font:11px/1.8 Consolas,monospace;position:relative}.tutor-message-content code{direction:ltr;unicode-bidi:embed;font-family:Consolas,monospace}.tutor-message-content :not(pre)>code{background:#f0f4f3;border-radius:3px;padding:1px 4px;color:#165a51}.tutor-message-content .katex-display{direction:ltr;overflow:auto;padding:4px 0}.tutor-message-content table{display:block;overflow:auto;border-collapse:collapse;font-size:11px}.tutor-message-content th,.tutor-message-content td{padding:6px;border:1px solid #d8e4df}.tutor-message-content a{color:#0f766e;text-decoration:underline}.tutor-message-content blockquote{border-inline-start:3px solid #b3d6c8;margin:8px 0;padding-inline-start:10px;color:#64748b}
.tutor-code-copy{display:block;border:1px solid #b9cfc4;border-radius:6px;background:#f4faf7;padding:3px 8px;margin-top:4px;font-size:10px!important}
.tutor-sources{margin-top:10px;border-top:1px dashed #dce5e0;padding-top:8px}.tutor-source{display:block;width:100%;border:0;background:transparent;text-align:right;color:#0f766e!important;font-size:10px!important;line-height:1.8;padding:4px 0}.tutor-cite{display:inline;border:0;border-radius:4px;background:#e4f5ec;color:#0f766e!important;font-size:10px!important;margin-inline:2px;padding:0 4px}
.tutor-message-actions{display:flex;gap:12px;margin-top:9px;flex-wrap:wrap}.tutor-message-actions button{font-size:10px;border:0;background:transparent;padding:2px;color:#54746a}.tutor-message-actions button:hover{color:#0f766e}
.tutor-compose{padding:12px;border-top:1px solid #dce8e2;background:#fafcfb;flex-shrink:0}.tutor-compose textarea{resize:vertical;width:100%;min-height:66px;max-height:150px;padding:11px 12px;background:white;border:1px solid #cfded6;border-radius:12px;font:12px/1.9 inherit;font-family:inherit;color:#163a2e}.tutor-compose-bottom{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:8px}.tutor-compose-bottom select{max-width:125px;border:0;background:transparent;font:10px inherit;font-family:inherit;color:#6a7c74}.tutor-primary{border:0;border-radius:10px;background:#0f766e;color:white!important;padding:9px 17px;font-size:12px!important;font-weight:700!important}.tutor-primary:hover{background:#115e59}.tutor-secondary{border:1px solid #cdded6;border-radius:9px;background:#fff;padding:8px 12px;font-size:11px!important}.tutor-footnote{font-size:9px;color:#7c8d84;margin:8px 0 0;line-height:1.8}.tutor-selection{font-size:11px;line-height:1.8;border-inline-start:3px solid #0f766e;background:#edf6f0;padding:8px;margin-bottom:8px;max-height:95px;overflow:auto}.tutor-selection button{float:left;border:0;background:none;color:#667b70}.tutor-notice{font-size:11px;line-height:1.9;background:#fffbeb;border:1px solid #f1e3b8;border-radius:10px;margin:0 12px 8px;padding:9px 11px;color:#755c22}.tutor-notice button{border:0;background:transparent;text-decoration:underline;font-size:inherit}.tutor-live{font-size:10px;color:#0f766e;min-height:16px;margin:0 15px 6px}
.tutor-quiz{padding:15px;border:1px solid #d6e6dd;background:linear-gradient(130deg,#f5fbf7,#fff);border-radius:15px;margin-bottom:13px}.tutor-quiz h3{font-size:14px;margin:6px 0 12px;line-height:1.9}.tutor-quiz p{font-size:12px;line-height:2}.tutor-quiz small{font-size:10px;color:#587366}.tutor-quiz-actions{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}.tutor-quiz-answer{border-top:1px dashed #c5d7cc;margin-top:12px;padding-top:10px}.tutor-progress{display:flex;gap:8px;margin-bottom:14px}.tutor-progress>div{flex:1;padding:12px;border:1px solid #dfebe5;border-radius:12px;background:#f6fbf8;text-align:center}.tutor-progress b{display:block;font-size:22px;color:#0f766e}.tutor-progress small{font-size:10px;color:#6f8377}.tutor-note{padding:12px;border:1px solid #e0e9e4;border-radius:12px;margin-bottom:10px;white-space:pre-wrap;font-size:12px;line-height:1.9}.tutor-note button{display:block;margin-top:8px;border:0;background:transparent;color:#8c5656;font-size:10px}.tutor-empty{padding:20px 8px;color:#74877b;font-size:12px;line-height:2}.tutor-read{font-size:11px;display:flex;align-items:center;gap:6px;margin:8px 0 16px}
.tutor-dialog{direction:rtl;width:min(520px,calc(100vw - 28px));max-height:85dvh;border:1px solid #d5e5dc;border-radius:19px;padding:22px;color:#243f32;font-family:inherit;background:#fff;box-shadow:0 30px 100px #102e3040}.tutor-dialog::backdrop{background:#112b2a70;backdrop-filter:blur(3px)}.tutor-dialog h2{font-size:19px;margin:0 0 15px}.tutor-dialog h3{font-size:14px;margin:20px 0 10px}.tutor-dialog p{font-size:12px;line-height:2;color:#64796c}.tutor-dialog label{display:block;font-size:12px;margin:12px 0 6px}.tutor-dialog input,.tutor-dialog select{width:100%;border:1px solid #cdded3;border-radius:9px;padding:10px;background:#fff;color:#234736;font:12px inherit;font-family:inherit}.tutor-dialog input[type=radio]{width:auto;accent-color:#0f766e}.tutor-dialog-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:15px}.tutor-dialog-status{font-size:11px;color:#73572d;line-height:1.9;min-height:22px}.tutor-dialog-close{float:left}.tutor-connection-card{padding:12px;border:1px solid #dbe7df;border-radius:12px;background:#f7fbf9;margin:12px 0}.tutor-connection-card b{font-size:12px}.tutor-divider{border:0;border-top:1px solid #e1eae4;margin:20px 0}.tutor-data-actions{display:flex;gap:8px;flex-wrap:wrap}.tutor-danger{color:#9d4141!important}.tutor-provider-name{direction:ltr;display:inline-block;font:10px Consolas,monospace;max-width:200px;overflow:hidden;vertical-align:middle;text-overflow:ellipsis}
@media(max-width:1100px) and (min-width:761px){.tutor-layout.is-open{grid-template-columns:minmax(0,1fr) 360px}}
@media(max-width:760px){.tutor-layout.is-open{grid-template-columns:minmax(0,1fr)}.tutor-open-mobile .reader-view{animation:none;transform:none}.tutor-panel{position:fixed;inset:0;margin:0;height:100dvh;min-height:0;z-index:1000;border:0;border-radius:0}.tutor-head{padding-top:max(14px,env(safe-area-inset-top))}.tutor-compose{padding-bottom:max(12px,env(safe-area-inset-bottom))}.tutor-welcome{max-width:440px;margin:auto}.tutor-dialog{z-index:1100}.tutor-compose textarea{resize:none;max-height:110px}.tutor-open-mobile{overflow:hidden}.tutor-toggle{min-height:38px!important}}
.tutor-message-content .katex{direction:ltr;unicode-bidi:isolate;display:inline-block}
.tutor-panel .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(prefers-reduced-motion:reduce){.tutor-panel *,.tutor-dialog *,.tutor-toggle,.tutor-toggle::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media print{.tutor-panel,.tutor-toggle,.tutor-dialog{display:none!important}.tutor-layout.is-open{display:block}}