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#d7e5e7;border-radius:15px;padding:20px;background:#f9fcfc}.txs-source-heading{display:flex;gap:12px;flex-wrap:wrap;align-items:center;justify-content:space-between;margin-bottom:17px}.txs-source-empty{border:1px dashed #bbd4d6;border-radius:12px;min-height:230px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:22px;color:#7c9ba6;line-height:1.8}.txs-source-empty p{font-size:14px}.txs-source-empty small{font-size:11px;max-width:360px}.txs-source-empty svg{color:#83b2ab}.txs-source-name{font-size:12px;line-height:1.7;overflow-wrap:anywhere;margin-bottom:13px;color:#557f8b}.txs-source-preview{font-size:12px;line-height:1.8;color:#75919e}.txs-source-preview iframe{width:100%;height:65dvh;border:1px solid #dce6e9;border-radius:9px}.txs-image-zoom{border:0;background:none;padding:0;width:100%;display:block;cursor:zoom-in}.txs-image-zoom img{max-width:100%;height:auto;display:block;border-radius:8px}.txs-source-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:15px}.txs-hash{margin-top:16px;color:#89a1ac;font-size:10px;line-height:1.8}.txs-hash summary{cursor:pointer}.txs-hash code{display:block;overflow-wrap:anywhere;white-space:normal;margin-top:10px;font-size:10px}.txs-form{min-width:0;background:#fff;border:1px solid #d7e5e8;border-radius:15px;padding:24px}.txs-form>.eyebrow{display:block;margin-bottom:20px}.txs-form .field{display:flex;flex-direction:column;min-width:0;gap:9px;font-size:11px;line-height:1.5;color:#688b98;margin:16px 0}.txs-form .field input,.txs-form .field textarea{width:100%;min-width:0;font:13px/1.7 Arial,sans-serif;padding:12px 13px;background:#fbfdfd;border:1px solid #d1e0e6;border-radius:9px;color:#315a70}.txs-form textarea{resize:vertical}.txs-fields-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.txs-subject-picker{position:relative}.txs-subject-button{background:#eff7f4;border:1px solid #bdd8d2;border-radius:11px;width:100%;padding:13px 15px;text-align:left;font-size:13px;color:#487b80;line-height:1.7}.txs-subject-button>span{display:block;font-size:9px;color:#87a6aa;margin-top:4px}.txs-subject-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;max-height:300px;overflow-y:auto;border:1px solid #d4e4e6;border-radius:10px;padding:10px;margin-top:8px}.txs-subject-options button{border:1px solid #dce8e9;border-radius:8px;background:#fff;text-align:left;padding:10px;font-size:11px;color:#648893;overflow-wrap:anywhere;min-height:40px}.txs-subject-options button[aria-pressed=true]{background:#e7f3ee;border-color:#9fc9bd}.txs-grades{border:0;padding:0;margin:20px 0;display:flex;gap:6px;flex-wrap:wrap;min-width:0}.txs-grades legend{font-size:11px;color:#6b8d9a;margin-bottom:10px}.txs-grades button{border:1px solid #d4e2e7;border-radius:9px;background:#fbfdfd;color:#658b96;min-width:36px;min-height:38px;padding:7px;font-size:12px}.txs-grades button[aria-pressed=true]{background:#dcefe8;color:#376e6a;border-color:#9dc8b9}.txs-task-heading{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin:30px 0 15px}.txs-task-list{display:grid;gap:14px}.txs-task{border:1px solid #d7e4e8;border-radius:12px;padding:17px;background:#f8fbfb;min-width:0}.txs-task>header{display:flex;align-items:center;justify-content:space-between;gap:12px}.txs-task>header b{font-size:12px;font-weight:500;color:#5c8591}.txs-task>header button{border:0;background:none;padding:8px 0 8px 8px;color:#9ba7ae;font-size:10px}.txs-review{border-top:1px solid #e0e9ec;padding-top:24px;margin-top:30px}.txs-review>p{font-size:12px;line-height:1.8;color:#7a9aa4}.txs-review>label{display:flex;gap:10px;align-items:flex-start;margin:20px 0;font-size:12px;line-height:1.8;color:#628b96}.txs-review input{flex:none;width:18px;height:18px;margin-top:3px;accent-color:#65a496}.txs-actions{display:flex;gap:8px;flex-wrap:wrap}.txs-status{font-size:12px;line-height:1.8;color:#568b8d;min-height:20px;overflow-wrap:anywhere}.txs-delete{border-top:1px solid #e3ebed;padding-top:15px;margin-top:20px;display:flex;gap:8px;flex-wrap:wrap}.txs-delete p{font-size:11px;line-height:1.7;color:#8c9ca6;width:100%;margin:0}.textbook-sources button:disabled{opacity:.5;cursor:default}.textbook-sources button:focus-visible{outline:3px solid #70aeb4;outline-offset:3px}.txs-zoom{max-width:calc(100vw - 30px);width:1000px;max-height:calc(100dvh - 30px);border:1px solid #cddfe1;border-radius:14px;background:#f3f7f8;padding:18px;overflow:auto}.txs-zoom::backdrop{background:#071b34c9;backdrop-filter:blur(4px)}.txs-zoom>button{display:block;margin-left:auto;border:1px solid #cbdde0;border-radius:9px;background:#fff;color:#5c8390;padding:10px 15px;margin-bottom:15px;font-size:12px}.txs-zoom>img{display:block;width:100%;height:auto}
@media(max-width:1000px){.txs-workspace{grid-template-columns:1fr}.txs-source{position:static}.txs-source-preview iframe{height:420px}.txs-image-zoom img{max-height:480px;object-fit:contain;margin:auto}.txs-image-zoom{background:#e7eff0;border-radius:10px}}
@media(max-width:650px){.txs-form{padding:19px}.txs-source{padding:17px}.txs-form .field input,.txs-form .field textarea{font-size:16px}.txs-fields-row{grid-template-columns:repeat(2,minmax(0,1fr))}.txs-fields-row .field:last-child{grid-column:1/-1}.txs-task{padding:13px}.txs-subject-options{grid-template-columns:1fr}.txs-grades{gap:5px}.txs-grades button{min-width:38px;min-height:40px}.txs-source-empty{min-height:180px}.txs-zoom{padding:12px}.txs-unit-list>button{flex-basis:210px}}
.txs-fpu{border:1px solid #cfe2df;border-radius:12px;background:#f3f9f6;padding:17px;margin:24px 0}.txs-fpu>p{font-size:11px;line-height:1.8;color:#7d99a2}.txs-fpu .eyebrow{font-size:9px}.txs-fpu-search{display:flex;gap:9px;align-items:end}.txs-fpu-search .field{flex:1;margin-bottom:0}.txs-fpu-results{display:grid;gap:8px;max-height:310px;overflow-y:auto;margin-top:15px}.txs-fpu-results:empty{display:none}.txs-fpu-results>button{border:1px solid #cbded9;border-radius:9px;background:#fff;text-align:left;padding:12px;font-size:11px;line-height:1.7;color:#6d8c98;overflow-wrap:anywhere}.txs-fpu-results b{display:block;font-weight:500;color:#477a7e;margin-bottom:6px}.txs-fpu-selected{border-left:2px solid #97bfb5;padding-left:12px;font-size:11px;line-height:1.8;color:#76949c;margin:17px 0;overflow-wrap:anywhere}.txs-fpu-selected>b{font-size:9px;text-transform:uppercase;font-weight:500}.txs-fpu-selected>p{white-space:pre-wrap}.txs-fpu>.txs-fields-row{grid-template-columns:1.4fr 1fr}.txs-fpu-zoom>iframe{width:100%;height:70dvh;border:1px solid #cedfe2}.txs-fpu-zoom>p,.txs-fpu-zoom>a{font-size:12px;line-height:1.8;color:#73929e}.txs-fpu-zoom>a{display:block;margin-top:12px;text-decoration:underline}
@media(max-width:650px){.txs-fpu{padding:13px}.txs-fpu-search{flex-wrap:wrap}.txs-fpu-search .field{flex-basis:100%}.txs-fpu>.txs-fields-row{grid-template-columns:1fr}.txs-fpu>.txs-fields-row .field:last-child{grid-column:auto}}
.txs-ocr{border-top:1px solid #dce8e8;margin-top:22px;padding-top:20px}.txs-ocr>p,.txs-ocr-targets>p{font-size:11px;line-height:1.8;color:#7f9aa5}.txs-ocr .field{display:flex;flex-direction:column;gap:9px;font-size:11px;color:#74949e;line-height:1.7}.txs-ocr textarea{width:100%;min-width:0;padding:12px;border:1px solid #cddfe1;border-radius:10px;background:#fff;color:#3c6576;font-size:13px;line-height:1.8;resize:vertical}.txs-ocr-targets{display:flex;flex-wrap:wrap;gap:8px}.txs-ocr button:disabled{opacity:.5;cursor:default}@media(max-width:650px){.txs-ocr textarea{font-size:16px}}

.txs-provided{margin:22px 0 30px}.txs-provided>p{max-width:75ch;color:#65758b;font-size:.88rem;line-height:1.6}.txs-provided-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}.txs-provided-card{min-width:0;display:flex;flex-direction:column;align-items:flex-start;gap:12px;text-align:left;padding:22px;border:1px solid #d3dfe7;border-radius:14px;background:linear-gradient(135deg,#fff,#f1f5f8);color:#12283f;cursor:pointer;transition:transform .2s,border-color .2s}.txs-provided-card:hover{transform:translateY(-3px);border-color:#7da8ab}.txs-provided-card>span{font-size:.7rem;letter-spacing:.16em;color:#607e8e;text-transform:uppercase}.txs-provided-card strong{font:400 1.26rem/1.3 Georgia,serif;text-wrap:balance}.txs-provided-card small{color:#697b8d;font-size:.75rem}.txs-provided-card>b{margin-top:auto;font-size:.77rem;font-weight:500;color:#326c6b}.txs-provided-card:focus-visible{outline:2px solid #478b89;outline-offset:3px}@media(max-width:900px){.txs-provided-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:520px){.txs-provided-grid{grid-template-columns:1fr}.txs-provided-card{padding:18px}}@media(prefers-reduced-motion:reduce){.txs-provided-card{transition:none}.txs-provided-card:hover{transform:none}}

.textbook-sources .txs-provided-art{display:block;width:100%;height:118px;object-fit:cover;border-radius:10px;margin:0 0 15px;background:#e7eef0}.textbook-sources .txs-provided-card{overflow:hidden}
@media(max-width:650px){.textbook-sources .txs-provided-art{height:124px}}