/* V2.19 conversational grammar tutor and error analytics */
.grammar-course-item{flex-wrap:wrap}.grammar-lesson-action.tutor{background:#eef6ff;color:#255ca8;border:1px solid #b9d4f5;margin-left:6px}.grammar-tutor-open{overflow:hidden}.grammar-tutor-modal{position:fixed;inset:0;z-index:10020;background:rgba(25,45,75,.38);display:flex;align-items:stretch;justify-content:center;padding:12px}.grammar-tutor-dialog{width:min(920px,100%);height:calc(100dvh - 24px);background:#fff;border-radius:24px;overflow:hidden;box-shadow:0 24px 70px rgba(20,40,80,.28);display:flex;flex-direction:column}.grammar-tutor-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;padding:18px 20px 12px;background:linear-gradient(135deg,#f6fbff,#fffaf2);border-bottom:1px solid #dce8f4}.grammar-tutor-head h2{margin:3px 0 0;font-size:clamp(22px,3vw,32px);line-height:1.25}.grammar-tutor-progress{height:7px;background:#eaf0f7}.grammar-tutor-progress i{display:block;height:100%;background:linear-gradient(90deg,#5e9de8,#74c6a1);transition:width .25s}.grammar-tutor-body{padding:18px;overflow:auto}.tutor-chat{max-width:82%;padding:14px 16px;border-radius:18px;margin:0 0 14px;line-height:1.75}.tutor-chat span{display:block;font-size:12px;font-weight:800;color:#3169a8;margin-bottom:4px}.tutor-chat.teacher{background:#edf6ff;border-top-left-radius:6px;color:#20344e}.tutor-chat.teacher.soft{background:#fff7e9;border:1px solid #f2ddb8}.tutor-question-card{border:2px solid #bcd8f7;background:#f8fcff;border-radius:18px;padding:15px 17px;margin:12px 0 16px}.tutor-question-card p{font-size:18px;line-height:1.65;margin:6px 0 0;font-weight:700;color:#1e4d80}.tutor-board{background:#fff;border:1px solid #dce6f0;border-radius:20px;padding:18px;margin-bottom:14px;box-shadow:0 8px 26px rgba(40,74,112,.07)}.tutor-board h3{font-size:21px;margin:4px 0 14px;color:#173b66}.tutor-board p,.tutor-board li,.tutor-board td{font-size:17px;line-height:1.78}.tutor-step-label{font-size:12px;font-weight:800;color:#6582a0}.tutor-actions{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}.tutor-actions .btn{flex:1;min-width:145px}.tutor-support,.tutor-hint,.tutor-finish{border-radius:18px;padding:17px;margin-top:12px;line-height:1.75}.tutor-support{background:#f4f9ff;border:1px solid #cbdff5}.tutor-hint{background:#fff8e8;border:1px solid #efd59d}.tutor-finish{background:#eefaf3;border:1px solid #bde3c9}.tutor-sample{padding:12px;border-radius:12px;background:#fff;margin:10px 0;color:#40546d}.analytics-hero h2{margin:4px 0 8px}.analytics-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:12px 0}.analytics-coach h3{margin:4px 0 8px}.analytics-chart{margin-top:12px}.analytics-row{width:100%;display:grid;grid-template-columns:minmax(120px,1.5fr) minmax(100px,3fr) 36px;gap:10px;align-items:center;border:0;background:transparent;padding:10px 0;text-align:left;color:#24384f}.analytics-row:disabled{opacity:.45}.analytics-row i{height:12px;background:#edf2f7;border-radius:999px;overflow:hidden}.analytics-row i b{display:block;height:100%;background:linear-gradient(90deg,#76a9e8,#ed9c9c);border-radius:999px}.analytics-row strong{text-align:right}.analytics-detail{margin-top:12px}.analytics-examples{display:grid;gap:8px;margin:12px 0}.analytics-example{border:1px solid #dfe8f1;border-radius:14px;padding:12px;background:#fbfdff}.analytics-example p{margin:5px 0;font-size:14px;line-height:1.55}.analytics-example small{color:#718198}.analytics-tabs{overflow-x:auto}.analytics-tabs button{white-space:nowrap}@media(max-width:640px){.grammar-tutor-modal{padding:0}.grammar-tutor-dialog{height:100dvh;border-radius:0}.grammar-tutor-body{padding:13px}.tutor-chat{max-width:94%}.tutor-board{padding:14px}.tutor-board p,.tutor-board li,.tutor-board td{font-size:16px}.analytics-summary{grid-template-columns:repeat(3,1fr)}.analytics-row{grid-template-columns:110px 1fr 28px;font-size:13px}.grammar-lesson-action.tutor{margin-left:0;margin-top:6px}}