.study-main{max-width:980px}
.study-overview{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:28px 0 18px}
.study-overview>div{background:#edf5f1;border:1px solid #d6e6e0;border-radius:12px;padding:18px;display:grid;gap:5px}
.study-overview strong{color:#173d43;font-size:17px}.study-overview span{color:#587074;font-size:13px;line-height:1.5}
.reading-main .study-privacy{font-size:13px;line-height:1.7;color:#557075;margin:12px 0 28px}
.study-tabs{display:flex;gap:8px;overflow-x:auto;border-bottom:1px solid #d9e4e0;margin:30px 0 0;padding-bottom:8px}
.study-tabs button{border:1px solid #d9e4e0;background:#fff;color:#2c5559;padding:12px 17px;border-radius:8px;font:inherit;font-weight:700;white-space:nowrap;cursor:pointer}
.study-tabs button[aria-selected="true"]{background:#173d43;color:#fff;border-color:#173d43}
.study-tabs button:focus-visible,.study-form :focus-visible,.study-action:focus-visible{outline:3px solid #317e78;outline-offset:2px}
.study-panel{padding-top:4px}.study-panel[hidden]{display:none}
.study-example{border-left:4px solid #27766f;background:#eaf3ee;padding:14px 18px;margin:18px 0 26px;border-radius:0 8px 8px 0}
.study-example strong{color:#20474b}.study-example p{margin:5px 0 0;font-size:14px}
.study-form{background:#fff;border:1px solid #dbe6e1;border-radius:12px;padding:22px;margin:25px 0 30px;box-shadow:0 3px 16px rgba(20,55,58,.04)}
.study-form h3{margin:0 0 16px}.study-form label{display:grid;gap:7px;font-size:14px;font-weight:700;color:#284c50;margin-bottom:15px}
.study-form input,.study-form select,.study-form textarea{width:100%;box-sizing:border-box;border:1px solid #c7d8d1;border-radius:8px;background:#fff;color:#173d43;padding:11px 12px;font:inherit;font-weight:400}
.study-form textarea{min-height:110px;resize:vertical}.study-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 16px}
.study-form .btn{cursor:pointer}.form-message{min-height:1.4em;margin:8px 0 0!important;font-size:13px!important;color:#27665e!important}
.study-list-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.study-list-head h3{margin:0 0 12px}.study-list-head span{font-size:13px;color:#587074}
.study-list{display:grid;gap:10px}.study-record{background:#fff;border:1px solid #dbe6e1;border-radius:10px;padding:16px 18px}
.study-record strong{color:#173d43}.study-record small{color:#587074}.study-record p{margin:8px 0!important;font-size:14px!important;line-height:1.65!important}
.study-record .record-head{display:flex;justify-content:space-between;gap:8px;align-items:flex-start}.study-record .record-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.study-action{border:1px solid #bfd4cb;border-radius:7px;background:#eef6f2;color:#1d5d58;padding:7px 11px;font:inherit;font-size:12px;font-weight:700;cursor:pointer}
.study-action.danger{background:#fff;color:#7d4a45;border-color:#e0c8c5}.study-record.done{background:#f3f7f4}.study-record.done .record-head strong{text-decoration:line-through;text-decoration-color:#6d8c81}
.study-empty{background:#f1f5f2;border:1px dashed #c8d9d1;padding:18px;border-radius:10px;color:#526d6e;font-size:14px}
.study-record details{margin-top:10px}.study-record summary{cursor:pointer;color:#1b6661;font-weight:700}.study-end{display:flex;gap:10px;flex-wrap:wrap;margin-top:38px}
@media(max-width:720px){.study-overview{grid-template-columns:1fr}.study-fields{grid-template-columns:1fr}.study-form{padding:18px}.study-tabs button{padding:11px 13px}}