.stu-page{background:#fff;min-height:100vh;padding:34px 14px 24px;overflow-x:clip}.stu{--stu-bg: #e3f0fb;--stu-bg-2: #eef7fd;--stu-panel: #ffffff;--stu-panel-soft: #f2f9fe;--stu-blue: #1f9cf0;--stu-blue-2: #1488e0;--stu-blue-soft: #cfe9fb;--stu-blue-ink: #0f6fc0;--stu-orange: #ff5a1f;--stu-orange-2: #f04a12;--stu-ink: #2b3a46;--stu-ink-2: #5a6b78;--stu-grey: #d7dde3;--stu-grey-soft: #e6ebef;--stu-panel-border: #cfe3f3;--stu-radius: 26px;--stu-radius-sm: 16px;width:100%;max-width:1700px;margin:0 auto;background:var(--stu-bg);border-radius:24px;color:var(--stu-ink);padding:18px;font-family:var(--font)}.stu,.stu *{box-sizing:border-box}.stu-shell,.stu-home-grid,.stu-docs-grid,.stu-profile-split,.stu-subjects,.stu-content,.stu-subjects-col,.stu-subj-text,.stu-course-main{min-width:0}.stu-shell>*,.stu-home-grid>*,.stu-docs-grid>*,.stu-profile-split>*{min-width:0}.stu-header{display:flex;align-items:center;gap:16px;background:var(--stu-bg-2);border:1px solid #dbecf8;border-radius:var(--stu-radius);padding:14px 26px;margin-bottom:18px}.stu-logo{display:flex;align-items:center;gap:12px;text-decoration:none}.stu-logo-badge{width:46px;height:46px;flex-shrink:0;display:flex;align-items:center;justify-content:center}.stu-logo-text{line-height:1.05}.stu-logo-name{font-size:27px;font-weight:800;letter-spacing:.01em;color:var(--stu-blue)}.stu-logo-sub{font-size:10px;color:var(--stu-ink-2);letter-spacing:.01em}.stu-header-right{margin-left:auto;display:flex;align-items:center;gap:12px}.stu-social{width:48px;height:48px;border-radius:50%;background:#68c3ef;color:#fff;border:0;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;text-decoration:none;position:relative;transition:background .15s,transform .15s}.stu-social:hover{background:#4fb6ea;text-decoration:none;transform:translateY(-1px)}.stu-social svg{width:22px;height:22px}.stu-social-dot{position:absolute;top:-2px;right:-2px;min-width:18px;height:18px;padding:0 4px;border-radius:9px;background:var(--stu-orange);color:#fff;font-size:11px;font-weight:700;line-height:18px;text-align:center}.stu-logout{height:48px;padding:0 34px;border:0;cursor:pointer;background:var(--stu-orange);color:#fff;border-radius:999px;font-size:16px;font-weight:700;letter-spacing:.01em;transition:background .15s,transform .15s}.stu-logout:hover{background:var(--stu-orange-2);transform:translateY(-1px)}.stu-shell{display:grid;grid-template-columns:300px minmax(0,1fr);gap:18px;align-items:start}.stu-shell-wide{display:block}.stu-sidebar{background:transparent;border:0;box-shadow:none;padding:6px 25px;position:sticky;top:18px;display:flex;flex-direction:column;min-height:72vh}.stu-user{display:flex;align-items:center;gap:14px;margin-bottom:26px;min-width:0}.stu-user-ava{width:56px;height:56px;flex-shrink:0;border-radius:50%;overflow:hidden;display:inline-flex;box-shadow:0 2px 6px #1018281f}.stu-user-ava img{width:100%;height:100%;object-fit:cover}.stu-user-ava svg{display:block}.stu-user-meta{min-width:0}.stu-user-name{font-size:20px;font-weight:800;color:var(--stu-orange);line-height:1.12;word-break:break-word}.stu-user-grade{font-size:15px;color:var(--stu-ink-2)}.stu-pills{display:flex;flex-direction:column;gap:20px}.stu-pill{display:flex;align-items:center;justify-content:center;text-align:center;height:47px;padding:0 18px;border-radius:999px;background:var(--stu-blue);color:#fff;font-size:16px;font-weight:700;text-decoration:none;border:0;cursor:pointer;transition:background .15s,transform .15s}.stu-pill:hover{background:var(--stu-blue-2);text-decoration:none;transform:translateY(-1px)}.stu-pill.active,.stu-pill.stu-pill-orange{background:var(--stu-orange)}.stu-pill.active:hover,.stu-pill.stu-pill-orange:hover{background:var(--stu-orange-2)}.stu-side-foot{margin-top:auto;padding-top:20px;font-size:12px;color:#9fb2c0}.stu-content{min-width:0;display:flex;flex-direction:column;gap:18px}.stu-footer{margin-top:18px;padding:6px 10px;font-size:13px;color:#8aa0b0}.stu-topbar{display:flex;align-items:center;gap:16px;background:var(--stu-bg-2);border:1px solid #dbecf8;border-radius:var(--stu-radius);padding:14px 22px;margin-bottom:18px}.stu-topbar .stu-user{margin:0}.stu-topbar-actions{margin-left:auto;display:flex;gap:14px}.stu-tb-btn{padding:12px 34px;border-radius:999px;font-size:16px;font-weight:700;text-decoration:none;color:#fff;border:0;cursor:pointer;transition:transform .15s,background .15s}.stu-tb-btn:hover{text-decoration:none;transform:translateY(-1px)}@media(max-width:640px){.stu-topbar{flex-wrap:wrap;padding:14px 16px;gap:12px}.stu-topbar .stu-user{flex:1 1 100%}.stu-topbar-actions{margin-left:0;flex:1 1 100%;gap:10px}.stu-topbar-actions .stu-tb-btn{flex:1;text-align:center;padding:12px 14px}}.stu-tb-orange{background:var(--stu-orange)}.stu-tb-orange:hover{background:var(--stu-orange-2)}.stu-tb-blue{background:var(--stu-blue)}.stu-tb-blue:hover{background:var(--stu-blue-2)}.stu-panel{background:var(--stu-panel-soft);border:1px solid var(--stu-panel-border);border-radius:var(--stu-radius);padding:24px;box-shadow:0 1px 3px #1018280a}.stu-panel-white{background:#fff}.stu-panel-title{text-align:center;font-size:18px;color:var(--stu-ink-2);margin:0 0 18px;font-weight:600}.stu-card-white{background:var(--stu-panel);border-radius:var(--stu-radius-sm)}.stu-home-grid{display:grid;grid-template-columns:300px minmax(0,1fr);gap:18px;align-items:start}.stu-photo{position:relative;background:linear-gradient(155deg,#4db6ef,#2a9ae6 55%,#1f84d6);border-radius:var(--stu-radius);aspect-ratio:1 / 1;overflow:hidden;display:flex;align-items:center;justify-content:center;box-shadow:inset 0 2px 10px #ffffff40}.stu-photo img{width:100%;height:100%;object-fit:cover}.stu-photo-bubbles{width:100%;height:100%;display:block}.stu-photo-add{position:absolute;left:50%;bottom:16px;transform:translate(-50%);width:48px;height:48px;border-radius:50%;background:#fffc;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:28px;color:#2a6fa0;border:0;box-shadow:0 2px 6px #1018282e}.stu-photo-add input{display:none}.stu-mini-panel{background:var(--stu-panel);border:1px solid #e4eff8;border-radius:var(--stu-radius);padding:18px 20px;text-align:center}.stu-mini-title{font-size:15px;color:var(--stu-ink-2);margin-bottom:4px}.stu-points{font-size:34px;font-weight:800;color:var(--stu-orange)}.stu-card-rows{display:flex;flex-direction:column;gap:12px}.stu-card-row{background:var(--stu-grey-soft);border-radius:999px;padding:12px 18px;text-align:center;font-size:16px;color:var(--stu-ink);border:0;width:100%;cursor:default;text-decoration:none;display:block}.stu-card-row.strong{font-weight:800;color:var(--stu-orange)}a.stu-card-row,button.stu-card-row{cursor:pointer;transition:background .15s}a.stu-card-row:hover,button.stu-card-row:hover{background:#dbe2e8;text-decoration:none}.stu-course-row{display:flex;align-items:center;gap:18px;text-decoration:none;color:inherit;border-radius:20px;padding:16px 22px;margin-bottom:14px;transition:transform .15s,box-shadow .15s}.stu-course-row:last-child{margin-bottom:0}.stu-course-row:hover{text-decoration:none;transform:translateY(-1px);box-shadow:0 6px 18px #10182814}.stu-course-ico{width:56px;height:56px;border-radius:16px;background:#ffffffb8;display:inline-flex;align-items:center;justify-content:center;font-size:30px;line-height:1;flex-shrink:0;box-shadow:0 1px 3px #1018281a}.stu-course-main{flex:1;min-width:0}.stu-course-title{font-size:22px;font-weight:700;color:var(--stu-ink)}.stu-course-sub{font-size:14px;color:var(--stu-ink-2);margin-top:2px}.stu-course-pct{font-size:24px;font-weight:700;color:var(--stu-ink-2);flex-shrink:0}.stu-btn-grey{display:block;width:100%;text-align:center;padding:14px;border-radius:999px;background:#d7dde3;color:var(--stu-ink-2);border:0;font-size:16px;font-weight:600;cursor:pointer;text-decoration:none;transition:background .15s}.stu-btn-grey:hover{background:#cad1d8;text-decoration:none}.stu-tariff-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:16px}.stu-tariff-card{background:#d4e8f9;border:1px solid #bcddf4;border-radius:var(--stu-radius-sm);padding:20px 18px;text-align:center;display:flex;flex-direction:column;gap:14px;box-shadow:0 2px 8px #1018280d}.stu-tariff-card .lvl{font-size:17px;font-weight:800;text-transform:uppercase;color:var(--stu-ink)}.stu-tariff-card .sub{font-size:15px;color:var(--stu-ink-2);margin-top:-8px}.stu-tariff-btn{margin-top:auto;padding:12px;border-radius:999px;background:#8fd0f5;color:#0f5a90;border:0;font-size:15px;font-weight:700;cursor:pointer;text-decoration:none;display:block;transition:background .15s}.stu-tariff-btn:hover{background:#76c4f1;text-decoration:none}.stu-doc-status{display:flex;flex-direction:column;gap:12px}.stu-doc-status .row{background:var(--stu-grey-soft);border-radius:999px;padding:11px 16px;text-align:center;font-size:15px;color:var(--stu-ink-2)}.stu-doc-status .row.done{background:#d9f0c2;color:#4e7a2a}.stu-referral{font-size:16px}.stu-referral .promo{color:var(--stu-orange);font-weight:800;margin-bottom:14px}.stu-referral .friends-head{display:flex;justify-content:space-between;color:var(--stu-ink-2);margin-bottom:8px}.stu-referral .friend{display:flex;justify-content:space-between;padding:6px 0;border-top:1px solid #e0ebf3}.stu-page-title{text-align:center;font-size:30px;font-weight:700;letter-spacing:.02em;color:var(--stu-ink);margin:6px 0 26px;text-transform:uppercase}.stu-course-panel{padding:30px 38px 38px}.stu-subjects{display:grid;grid-template-columns:1fr 1fr;gap:20px 28px}.stu-subjects-col{display:flex;flex-direction:column;gap:20px}.stu-subj-card{position:relative;display:block;text-decoration:none;color:#fff;border-radius:22px;overflow:hidden;min-height:96px;background:var(--sc-track, #e3e8ee);transition:transform .15s,box-shadow .15s}.stu-subj-card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 8px 22px #1018281f}.stu-subj-fill{position:absolute;top:0;bottom:0;left:0;width:var(--sc-fill, 0%);background:var(--sc-color, #1f9cf0);border-radius:0}.stu-subj-inner{position:relative;display:flex;align-items:center;gap:18px;padding:12px 26px;min-height:96px}.stu-subj-inner:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border-radius:22px;pointer-events:none;background:linear-gradient(90deg,#00000038,#0000001a 30%,#0000 56%)}.stu-subj-inner>*{position:relative;z-index:1}.stu-subj-ico{display:inline-flex;flex-shrink:0;filter:drop-shadow(0 3px 4px rgba(0,0,0,.22))}.stu-subj-ico svg{display:block}.stu-subj-ico img{display:block;width:46px;height:46px;object-fit:contain}.stu-subj-card .stu-subj-ico img{width:72px;height:72px}.stu-subj-text{flex:1;min-width:0}.stu-subj-name{display:block;font-size:23px;font-weight:700;text-shadow:0 1px 3px rgba(0,0,0,.32)}.stu-subj-sub{display:block;font-size:14px;opacity:.97;text-shadow:0 1px 3px rgba(0,0,0,.32);margin-top:3px}.stu-subj-grade{position:relative;flex-shrink:0;font-size:36px;font-weight:800;color:#141e28b8;min-width:34px;text-align:center;text-shadow:none}.stu-subject-head{display:grid;grid-template-columns:minmax(0,1fr) 540px;gap:20px;align-items:start;margin-bottom:32px}.stu-subject-banner{position:relative;border-radius:22px;overflow:hidden;min-height:100px;background:var(--sc-track, #e3e8ee)}.stu-subject-banner .fill{position:absolute;top:0;bottom:0;left:0;width:var(--sc-fill,100%);border-radius:22px;background:linear-gradient(135deg,color-mix(in srgb,var(--sc-color) 82%,#fff),var(--sc-color) 55%,color-mix(in srgb,var(--sc-color) 86%,#000))}.stu-subject-banner .inner{position:relative;display:flex;align-items:center;gap:18px;padding:22px 28px;color:#fff}.stu-subject-banner .ico{flex-shrink:0;filter:drop-shadow(0 3px 4px rgba(0,0,0,.22))}.stu-subject-banner .name{font-size:25px;font-weight:800;text-transform:uppercase;text-shadow:0 1px 3px rgba(0,0,0,.28)}.stu-subject-banner .sub{font-size:14px;opacity:.97;margin-top:2px;text-shadow:0 1px 3px rgba(0,0,0,.28)}.stu-subject-acts{display:grid;grid-template-columns:1fr 1fr;gap:14px}.stu-act-btn{padding:14px 18px;border-radius:999px;text-align:center;font-size:15px;font-weight:700;border:0;cursor:pointer;text-decoration:none;display:block;transition:transform .15s,background .15s}.stu-act-btn:hover{text-decoration:none;transform:translateY(-1px)}.stu-act-blue{background:var(--stu-blue);color:#fff}.stu-act-blue:hover{background:var(--stu-blue-2)}.stu-act-grey{background:var(--stu-grey);color:var(--stu-ink-2)}.stu-act-grey:hover{background:#c7ced4}.stu-act-btn:disabled,a.stu-act-btn[aria-disabled=true]{opacity:.55;cursor:not-allowed;transform:none}.stu-topics{display:grid;grid-template-columns:1fr 1fr;gap:14px 40px}.stu-topics-col{display:flex;flex-direction:column;gap:14px}.stu-topic-row{display:flex;align-items:stretch;gap:16px;text-decoration:none;color:inherit}.stu-topic-row:hover{text-decoration:none}.stu-topic-chip{width:120px;flex-shrink:0;border-radius:999px;padding:15px 10px;text-align:center;color:#fff;font-size:16px;font-weight:700;background:linear-gradient(135deg,color-mix(in srgb,var(--sc-color, #f3836f) 85%,#fff),var(--sc-color, #f3836f) 60%,color-mix(in srgb,var(--sc-color, #f3836f) 88%,#000));display:flex;align-items:center;justify-content:center;text-shadow:0 1px 2px rgba(0,0,0,.2)}.stu-topic-chip.pale{opacity:.45}.stu-topic-name{flex:1;min-width:0;background:#fff;border-radius:999px;padding:15px 26px;font-size:17px;color:var(--stu-ink);display:flex;align-items:center;gap:10px;transition:box-shadow .15s}.stu-topic-row:hover .stu-topic-name{box-shadow:0 4px 14px #10182814}.stu-theme-top{position:relative;border-radius:var(--stu-radius-sm);overflow:hidden}.stu-theme-row{display:grid;grid-template-columns:minmax(0,1fr) 540px;gap:20px;align-items:center;margin-bottom:18px}.stu-theme-tag{background:#fff;border-radius:999px;padding:15px 28px;font-size:16px;color:var(--stu-ink)}.stu-nav-row{display:flex;justify-content:space-between;margin-bottom:24px}.stu-ghost-pill{background:var(--stu-grey);color:var(--stu-ink-2);border:0;cursor:pointer;padding:12px 40px;border-radius:999px;font-size:15px;font-weight:600;text-decoration:none;display:inline-block;transition:background .15s}.stu-ghost-pill:hover{background:#c7ced4;text-decoration:none}.stu-wide-pill{display:flex;align-items:center;gap:16px;background:#fff;border-radius:999px;padding:16px 28px;font-size:20px;font-weight:600;color:var(--stu-ink);text-decoration:none;margin-bottom:20px;box-shadow:0 2px 10px #1018280d}a.stu-wide-pill:hover{text-decoration:none;box-shadow:0 6px 18px #1018281a}.stu-wide-pill .em{font-size:28px;line-height:1;display:inline-flex;align-items:center}.stu-wide-pill .check{color:#8bc34a;font-size:30px;font-weight:800}.stu-test-intro{background:#fff;border-radius:var(--stu-radius-sm);padding:24px 28px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}.stu-test-intro p{margin:0;font-size:16px;line-height:1.5;color:var(--stu-ink)}.stu-blue-soft-btn{background:var(--stu-blue-soft);color:#0f6fc0;border:0;cursor:pointer;padding:16px 48px;border-radius:999px;font-size:16px;font-weight:700;white-space:nowrap;text-decoration:none;display:inline-block;transition:background .15s}.stu-blue-soft-btn:hover{background:#b9def7;text-decoration:none}.stu-quiz{background:#fff;border-radius:var(--stu-radius-sm);padding:28px 32px}.stu-quiz-count{color:var(--stu-ink-2);font-size:17px;margin-bottom:16px}.stu-quiz-q{font-size:19px;line-height:1.5;margin-bottom:22px;color:var(--stu-ink);white-space:pre-wrap}.stu-quiz-opts{display:flex;flex-direction:column;gap:14px;margin-bottom:24px}.stu-opt{display:flex;align-items:center;gap:12px;font-size:17px;cursor:pointer;color:var(--stu-ink-2);padding:2px 0}.stu-opt input{position:absolute;opacity:0;width:0;height:0}.stu-opt-mark{width:22px;height:22px;border-radius:50%;border:2px solid #c2ccd4;flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;font-size:14px}.stu-opt.sel .stu-opt-mark{border-color:var(--stu-blue);background:var(--stu-blue);color:#fff}.stu-opt.sel{color:var(--stu-ink)}.stu-opt.correct{color:#1f9d55}.stu-opt.correct .stu-opt-mark{border-color:#1f9d55;background:#1f9d55;color:#fff}.stu-opt.wrong{color:#e8412a}.stu-opt.wrong .stu-opt-mark{border-color:#e8412a;background:#e8412a;color:#fff}.stu-quiz-fb{margin-bottom:18px;font-size:15px;padding:12px 16px;border-radius:12px}.stu-quiz-fb.ok{background:#e9f8ef;color:#1f7a44}.stu-quiz-fb.bad{background:#fdecea;color:#b4291a}.stu-exam-head{display:grid;grid-template-columns:minmax(0,1fr) 420px;gap:24px;align-items:start;margin-bottom:28px}.stu-timer-wrap{text-align:center}.stu-timer-lbl{font-size:15px;color:var(--stu-ink-2);margin-bottom:8px}.stu-timer-box{background:#fff;border-radius:var(--stu-radius-sm);padding:18px;text-align:center;font-size:34px;font-weight:700;font-variant-numeric:tabular-nums;color:var(--stu-ink)}.stu-timer-box.warn{color:#e8412a}.stu-timer-ctl{display:flex;align-items:center;justify-content:flex-end;gap:12px;margin-top:10px}.stu-timer-ctl span{font-size:14px;color:var(--stu-ink-2)}.stu-exam-form{background:#fff;border-radius:var(--stu-radius-sm);padding:28px 32px}.stu-exam-form .lead{font-size:16px;margin:0 0 24px;color:var(--stu-ink)}.stu-exam-field{margin-bottom:18px;max-width:420px}.stu-exam-field label{display:block;font-size:15px;font-weight:700;margin-bottom:7px;color:var(--stu-ink)}.stu-exam-field label .req{color:#e8412a}.stu-exam-field .hint{font-size:13px;color:var(--stu-ink-2);margin-top:6px}.stu-exam-input,.stu-exam-select{width:100%;padding:11px 14px;border:1px solid #d4dde4;border-radius:10px;font:inherit;color:var(--stu-ink);background:#fff}.stu-exam-input:focus,.stu-exam-select:focus{outline:none;border-color:var(--stu-blue);box-shadow:0 0 0 3px #1f9cf02e}.stu-exam-note{margin-top:20px;font-size:15px;color:var(--stu-ink-2);display:flex;gap:14px;align-items:flex-start}.stu-exam-note .arrow{color:var(--stu-orange);font-size:30px;line-height:1}.stu-docs-grid{display:grid;grid-template-columns:320px minmax(0,1fr);gap:18px;align-items:start}.stu-ready{background:var(--stu-panel);border:1px solid #e4eff8;border-radius:var(--stu-radius);padding:20px}.stu-ready+.stu-ready{margin-top:16px}.stu-ready-item{display:block;background:var(--stu-grey-soft);border-radius:999px;padding:12px 16px;text-align:center;font-size:15px;color:var(--stu-ink-2);text-decoration:none;margin-top:12px;border:0;width:100%;cursor:pointer;transition:background .15s}.stu-ready-item:hover{background:#dbe2e8;text-decoration:none}.stu-ready-item.done{background:#d9f0c2;color:#4e7a2a}.stu-ready-head{text-align:center;color:var(--stu-orange);font-weight:800;font-size:16px;margin-bottom:6px}.stu-ready ul{margin:10px 0 0;padding-left:20px;font-size:14px;color:var(--stu-ink);line-height:1.5}.stu-ready ul li{margin-bottom:6px}.stu-docs-panel{padding:28px 30px}.stu-docs-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,185px),1fr));gap:16px}.stu-doc-card{background:var(--stu-panel);border:1px solid #e4eff8;border-radius:var(--stu-radius-sm);padding:18px 14px;text-align:center;display:flex;flex-direction:column;gap:14px;min-height:130px}.stu-doc-card .name{font-size:14px;color:var(--stu-ink-2);flex:1;display:flex;align-items:center;justify-content:center}.stu-doc-card .act{background:var(--stu-blue-soft);color:#0f6fc0;border-radius:999px;padding:9px;font-size:14px;font-weight:600;border:0;cursor:pointer;text-decoration:none;display:block;transition:background .15s}.stu-doc-card .act:hover{background:#b9def7;text-decoration:none}.stu-upload-box{background:var(--stu-panel);border:1px solid #e4eff8;border-radius:var(--stu-radius);padding:22px;margin-top:18px}.stu-upload-head{display:flex;align-items:center;gap:12px;font-size:20px;font-weight:600;margin-bottom:18px}.stu-upload-head .check{color:#8bc34a;font-size:26px;font-weight:800}.stu-upload-fields{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:16px}.stu-upload-cta{width:100%;background:var(--stu-orange);color:#fff;border:0;cursor:pointer;padding:16px;border-radius:999px;font-size:18px;font-weight:700;transition:background .15s}.stu-upload-cta:hover{background:var(--stu-orange-2)}.stu-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.stu-stat{background:var(--stu-panel);border:1px solid #e4eff8;border-radius:var(--stu-radius-sm);padding:20px;text-align:center}.stu-stat b{display:block;font-size:34px;font-weight:800;color:var(--stu-blue-ink);line-height:1.1}.stu-stat.accent b{color:var(--stu-orange)}.stu-stat span{font-size:14px;color:var(--stu-ink-2)}.stu-points-list{display:flex;flex-direction:column}.stu-points-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 6px;border-top:1px solid #e0ebf3;font-size:15px}.stu-points-row:first-child{border-top:0}.stu-points-row .when{color:var(--stu-ink-2);font-size:13px;white-space:nowrap}.stu-points-row .delta{font-weight:700;white-space:nowrap}.stu-points-row .delta.plus{color:#1f9d55}.stu-points-row .delta.minus{color:#e8412a}.stu-settings-form{max-width:440px}.stu-settings-btn{background:var(--stu-blue);color:#fff;border:0;cursor:pointer;padding:13px 30px;border-radius:999px;font-size:15px;font-weight:700;transition:background .15s}.stu-settings-btn:hover:not(:disabled){background:var(--stu-blue-2)}.stu-settings-btn:disabled{opacity:.6;cursor:not-allowed}.stu-danger-btn{background:#fde7e3;color:#d6391f;border:0;cursor:pointer;padding:13px 30px;border-radius:999px;font-size:15px;font-weight:700;transition:background .15s}.stu-danger-btn:hover:not(:disabled){background:#f8d2cb}.stu-settings-sep{border:0;border-top:1px solid #dbe7f1;margin:22px 0}.stu-settings-note{font-size:14px;color:var(--stu-ink-2);margin:0 0 14px}.stu-alert-err{background:#fdecea;color:#b4291a;border-radius:12px;padding:10px 14px;font-size:14px;margin-bottom:12px}.stu-alert-ok{background:#e9f8ef;color:#1f7a44;border-radius:12px;padding:10px 14px;font-size:14px;margin-bottom:12px}@media(max-width:560px){.stu-stats{grid-template-columns:1fr}}.stu h1,.stu h2,.stu h3{color:var(--stu-ink)}.stu-profile-split{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:18px;align-items:start}@media(max-width:1200px){.stu-profile-split{grid-template-columns:1fr}}@media(max-width:1100px){.stu-subject-head,.stu-theme-row,.stu-exam-head{grid-template-columns:1fr}}@media(max-width:1024px){.stu-home-grid,.stu-docs-grid,.stu-subjects,.stu-topics{grid-template-columns:1fr}}@media(max-width:920px){.stu-shell{grid-template-columns:1fr}.stu-sidebar{position:static;min-height:0;padding:6px 2px}.stu-tariff-grid{grid-template-columns:1fr}.stu-pills{flex-direction:row;flex-wrap:wrap}.stu-pill{flex:1 1 140px}}@media(max-width:560px){.stu{padding:10px}.stu-header{padding:12px 14px;gap:8px;flex-wrap:wrap}.stu-logo-name{font-size:22px}.stu-social{width:40px;height:40px;font-size:13px}.stu-logout{height:40px;padding:0 20px;font-size:14px}.stu-upload-fields,.stu-docs-cards{grid-template-columns:1fr}.stu-topic-chip{width:92px;font-size:14px}}.stu-quiz-q .katex,.stu-opt .katex,.question-text .katex{font-size:1.2em}.stu-topic-group+.stu-topic-group{margin-top:26px}.stu-section-title{font-size:18px;font-weight:700;color:var(--stu-ink);margin:0 0 14px 6px}.stu-topic-title{min-width:0;overflow-wrap:anywhere}.stu-topic-row.locked{cursor:not-allowed}.stu-topic-row.locked .stu-topic-name{background:#f4f7fa;color:var(--stu-ink-2);justify-content:space-between;flex-wrap:wrap;row-gap:4px}.stu-topic-lock{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--stu-ink-2);white-space:nowrap}.stu-ghost-locked{display:inline-flex;align-items:center;gap:6px;cursor:not-allowed;opacity:.8}.stu-locked-panel{text-align:center;padding:34px 20px}.stu-locked-ic{color:var(--stu-ink-2);margin-bottom:8px}.stu-locked-panel p{margin:-6px 0 20px}.stu-theme-tag{min-width:0;overflow-wrap:anywhere}.stu-theme-section{display:block;font-size:13px;color:var(--stu-ink-2);margin-bottom:2px}.stu-intro{margin-bottom:20px}.stu-intro .content-html{overflow-wrap:anywhere}.stu-intro .content-html img{max-width:100%;height:auto}.stu-intro .content-html table{display:block;max-width:100%;overflow-x:auto}.stu-block{margin-bottom:20px}.stu-block>.stu-wide-pill{margin-bottom:14px}.stu-videos{display:flex;flex-direction:column;gap:18px}.stu-video-card{background:#fff;border-radius:var(--stu-radius-sm);padding:18px 20px 20px;min-width:0;box-shadow:0 2px 10px #1018280d}.stu-video-title{display:flex;align-items:center;gap:12px;font-size:18px;font-weight:600;margin-bottom:14px;overflow-wrap:anywhere}.stu-video-num{flex-shrink:0;width:34px;height:34px;border-radius:50%;background:var(--stu-blue-soft);color:var(--stu-blue-ink);display:inline-flex;align-items:center;justify-content:center;font-size:15px;font-weight:700}.stu-video{display:block;width:100%;max-width:960px;aspect-ratio:16 / 9;max-height:70vh;background:#0d1720;border-radius:12px;margin:0 auto}.stu-video-desc{margin:12px 0 0;color:var(--stu-ink-2);font-size:15px;line-height:1.5;white-space:pre-wrap}.stu-video-card .stu-mats{margin-top:14px}.stu-mats{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px}.stu-mat{display:grid;grid-template-columns:auto 1fr;align-items:center;gap:10px 12px;background:#fff;border:1px solid #e4eff8;border-radius:var(--stu-radius-sm);padding:12px 16px;color:var(--stu-ink);text-decoration:none;min-width:0;transition:box-shadow .15s}.stu-mat:hover{text-decoration:none;box-shadow:0 6px 18px #10182814}.stu-video-card .stu-mat{background:var(--stu-panel-soft)}.stu-mat-ic{flex-shrink:0;display:inline-flex}.stu-mat-body{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.stu-mat-title{font-weight:600;font-size:15px;overflow-wrap:anywhere}.stu-mat-meta{font-size:13px;color:var(--stu-ink-2)}.stu-mat-open{flex-shrink:0;font-size:13px;font-weight:700;color:var(--stu-blue-ink)}.stu-mat-actions{grid-column:1 / -1;display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px}.stu-mat-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:36px;padding:6px 16px;border-radius:999px;border:1px solid #cfe3f5;background:#fff;color:var(--stu-blue-ink);font-size:14px;font-weight:700;text-decoration:none;white-space:nowrap}.stu-mat-btn:hover{text-decoration:none;background:#f2f8fe}.stu-mat-btn-main{background:var(--stu-blue);border-color:var(--stu-blue);color:#fff}.stu-mat-btn-main:hover{background:var(--stu-blue-ink);border-color:var(--stu-blue-ink)}.stu-mat-all{display:inline-flex;align-items:center;gap:8px;margin-top:12px;font-size:14px;font-weight:700;color:var(--stu-blue-ink)}.stu-mats-empty{margin:4px 0 0}.stu-solution-link{display:block;margin-top:10px}.stu-solution-img{display:block;max-width:100%;height:auto;max-height:520px;border-radius:10px;background:#fff}@media(max-width:560px){.stu-video-card{padding:12px}.stu-video{border-radius:8px;max-height:none}.stu-video-title{font-size:16px}.stu-mats{grid-template-columns:1fr}.stu-mat-actions{justify-content:stretch}.stu-mat-btn{flex:1}.stu-section-title{font-size:16px}.stu-nav-row{gap:10px}.stu-nav-row .stu-ghost-pill{padding:12px 22px}}.stu-tutors-head{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:6px 0 26px}.stu-tutors-title{display:inline-flex;align-items:center;gap:14px;border-radius:18px;padding:6px 140px 6px 0;margin:0 0 0 14px;font-size:28px;font-weight:600;color:var(--stu-ink);background:#f3f9fe}.stu-tutors-title .cap{margin:-8px 0 -8px -14px;filter:drop-shadow(0 3px 4px rgba(0,0,0,.18))}.stu-tutors-hint{font-size:17px;color:var(--stu-ink-2)}.stu-chips{display:flex;flex-wrap:wrap;justify-content:center;align-items:flex-start;gap:12px 12px;margin:0 0 40px}.stu-chip{width:182px;padding:13px 10px;border-radius:999px;white-space:nowrap;background:#fff;border:1px solid #d3e8f7;cursor:pointer;font:inherit;font-size:16px;color:var(--stu-ink);text-align:center;transition:background .15s,transform .15s}.stu-chip:hover{background:#eef7fd;transform:translateY(-1px)}.stu-chip.active{background:#bfe3fa;border-color:#bfe3fa}.stu-chip.none{color:#8fa3b2}.stu-tutor-list{display:flex;flex-direction:column;gap:22px;max-width:1480px;width:100%;margin:0 auto}.stu-tutor-note{font-size:14px;color:var(--stu-ink-2);text-align:center;margin-bottom:-8px}.stu-tutor-empty{background:#fff;border-radius:var(--stu-radius-sm);padding:34px 20px;text-align:center;color:var(--stu-ink-2)}.stu-tutor{display:grid;grid-template-columns:minmax(0,500px) minmax(0,630px);justify-content:center;gap:26px;background:#fff;border-radius:22px;padding:24px 28px 34px;color:var(--stu-ink)}.stu-tutor-left{min-width:0;display:flex;flex-direction:column;align-items:center}.stu-tutor-photo{width:100%;aspect-ratio:1 / 1;border-radius:18px;overflow:hidden;background:#cfe9fb;box-shadow:0 6px 16px #10182838}.stu-tutor-photo img{width:100%;height:100%;object-fit:cover;object-position:center 22%;display:block}.stu-tutor-photo-ph{width:100%;height:100%;display:block}.stu-tutor-caption{margin-top:20px;font-size:13px;color:var(--stu-ink-2);text-align:center;overflow-wrap:anywhere}.stu-tutor-btns{width:86%;display:grid;grid-template-columns:1fr 1fr;gap:16px 12px;margin-top:18px}.stu-tutor-caption+.stu-tutor-btns{margin-top:6px}.stu-tutor-photo+.stu-tutor-btns{margin-top:32px}.stu-tutor-btn{display:flex;align-items:center;justify-content:center;min-height:44px;padding:8px 12px;border-radius:999px;color:#fff;font-size:14px;font-weight:700;text-decoration:none;transition:background .15s,transform .15s;text-align:center}.stu-tutor-btn:hover{text-decoration:none;transform:translateY(-1px);color:#fff}.stu-tutor-btn.wide{grid-column:1 / -1}.stu-tutor-btn.orange{background:#ff5f0f}.stu-tutor-btn.orange:hover{background:var(--stu-orange-2)}.stu-tutor-btn.blue{background:#0d9cf0}.stu-tutor-btn.blue:hover{background:#0a8ad6}.stu-tutor-btn.blue2{background:#0a84f0}.stu-tutor-btn.blue2:hover{background:#0874d6}.stu-tutor-right{min-width:0;font-size:14px;line-height:1.45;overflow-wrap:anywhere}.stu-tutor-name{display:flex;align-items:center;gap:12px;margin:4px 0 16px;font-size:20px;font-weight:500;color:var(--stu-ink)}.stu-tutor-name .pin{font-size:28px;line-height:1;flex-shrink:0}.stu-tutor-subj{font-size:14px;margin-bottom:14px}.stu-tutor-subj b{font-weight:800}.stu-tutor-prices{font-size:14px;margin-bottom:14px}.stu-tutor-prices b{font-weight:800}.stu-tutor-prices .stu-tutor-ul{font-size:14px;margin-top:8px}.stu-tutor-prices .stu-tutor-ul li{margin-bottom:6px}.stu-tutor-box{background:#e9f6fe;border-radius:16px;padding:18px 18px 14px;font-size:12.5px;line-height:1.4}.stu-tutor-box+.stu-tutor-box{margin-top:16px}.stu-tutor-box b{font-weight:800}.stu-tutor-box p{margin:0}.stu-tutor-box .pre{white-space:pre-line}.stu-tutor-box-title{font-weight:800;font-size:14px;margin:2px 0 20px}.stu-tutor-ul{margin:0;padding-left:20px}.stu-tutor-ul li.sub{list-style:none;margin-left:-4px}.stu-tutor-gap{height:16px}.stu-tutor-box .stu-tutor-ul+p{margin-top:16px}@media(max-width:1100px){.stu-tutor{grid-template-columns:minmax(0,360px) minmax(0,1fr);padding:20px}.stu-tutor-btns{width:100%}}@media(max-width:760px){.stu-tutors-title{padding-right:28px;font-size:22px}.stu-tutors-title .cap svg{width:64px;height:64px}.stu-tutor{grid-template-columns:1fr;padding:16px 14px 22px;gap:18px}.stu-tutor-left{max-width:420px;width:100%;margin:0 auto}.stu-chips{gap:8px;margin-bottom:24px}.stu-chip{width:auto;flex:1 1 calc(50% - 8px);font-size:14px;padding:10px 8px;white-space:normal}.stu-tutor-box{font-size:13px}}:root{--c-primary: #1f93ff;--c-primary-600: #0b7fe8;--c-primary-700: #066ac4;--c-primary-50: #eaf5ff;--c-primary-100: #ccebff;--c-sky: #29abe2;--c-accent: #ff8a1f;--c-accent-600: #f2700a;--c-accent-50: #fff3e6;--c-red: #e8412a;--c-success: #16a34a;--c-success-50: #e9f8ef;--c-warning: #d97706;--c-warning-50: #fff6e5;--c-danger: #dc2626;--c-danger-50: #fdeceb;--c-text: #17202b;--c-text-2: #4a5568;--c-muted: #7b8794;--c-border: #e3e8ef;--c-border-2: #d0d7e2;--c-bg: #f4f7fb;--c-surface: #ffffff;--c-surface-2: #f8fafc;--g-brand: linear-gradient(135deg, #1fc7ff 0%, #1f93ff 55%, #0b6fe0 100%);--g-warm: linear-gradient(135deg, #ffa621 0%, #ff6d4c 100%);--radius: 14px;--radius-sm: 9px;--radius-xs: 6px;--shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 4px 16px rgba(16, 24, 40, .06);--shadow-lg: 0 12px 40px rgba(16, 24, 40, .18);--header-h: 64px;--side-w: 264px;--font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;color-scheme:light}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;font-family:var(--font);font-size:15px;line-height:1.5;color:var(--c-text);background:var(--c-bg);-webkit-font-smoothing:antialiased}body.no-scroll{overflow:hidden}a{color:var(--c-primary-600);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3,h4{margin:0 0 .5em;line-height:1.25}img{max-width:100%}code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em}.muted{color:var(--c-muted)}.small{font-size:13px}.nowrap{white-space:nowrap}.right{text-align:right}.center{text-align:center}.mt{margin-top:16px}.mt-sm{margin-top:8px}.mb{margin-bottom:16px}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.row-between{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap}.stack{display:flex;flex-direction:column;gap:16px}.stack-sm{display:flex;flex-direction:column;gap:8px}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.grid-auto{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}.grow{flex:1;min-width:0}.pre-wrap{white-space:pre-wrap}.container{max-width:1180px;margin:0 auto;padding:24px 16px}.app{min-height:100vh;display:flex;flex-direction:column}.header{position:sticky;top:0;z-index:40;height:var(--header-h);background:#ffffffeb;-webkit-backdrop-filter:saturate(1.4) blur(8px);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--c-border)}.header-inner{height:100%;display:flex;align-items:center;gap:12px;padding:0 20px}.logo{display:flex;align-items:center}.logo img{height:42px;width:auto;display:block}.header-right{margin-left:auto;display:flex;align-items:center;gap:8px}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;border:0;background:transparent;color:var(--c-text-2);cursor:pointer;position:relative;flex-shrink:0}.icon-btn:hover{background:var(--c-primary-50);color:var(--c-primary-600);text-decoration:none}.social.tg{color:#229ed9}.social.vk{color:#07f}.burger{display:none}.notif-dot{position:absolute;top:3px;right:1px;min-width:18px;height:18px;padding:0 5px;border-radius:9px;background:var(--c-red);color:#fff;font-size:11px;font-weight:700;line-height:18px;text-align:center}.cabinet{flex:1;display:flex;align-items:stretch}.sidebar{width:var(--side-w);flex-shrink:0;background:var(--c-surface);border-right:1px solid var(--c-border);padding:16px 12px;display:flex;flex-direction:column;gap:4px;position:sticky;top:var(--header-h);height:calc(100vh - var(--header-h));overflow-y:auto}.side-user{display:flex;gap:10px;align-items:center;padding:8px 10px 14px;border-bottom:1px solid var(--c-border);margin-bottom:8px}.side-user-name{font-weight:600;font-size:14px;line-height:1.25}.side-user-role{font-size:12px;color:var(--c-muted)}.side-nav{display:flex;flex-direction:column;gap:2px}.side-scroll{max-height:46vh;overflow-y:auto}.side-link{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:var(--radius-sm);color:var(--c-text-2);font-weight:500;font-size:14px}.side-link svg{flex-shrink:0;opacity:.8}.side-link:hover{background:var(--c-surface-2);color:var(--c-text);text-decoration:none}.side-link.active{background:var(--c-primary-50);color:var(--c-primary-700)}.side-link.active svg{opacity:1}.side-person small{display:block;font-size:12px;color:var(--c-muted);font-weight:400}.side-section{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--c-muted);padding:12px 12px 4px;font-weight:600}.side-empty{font-size:13px;color:var(--c-muted);padding:6px 12px}.side-school{margin-top:auto;padding:16px 12px 4px;font-size:12px;color:var(--c-muted)}.sidebar-backdrop{display:none}.content{flex:1;min-width:0;padding:28px 32px 48px;max-width:1240px}.public-main{flex:1}.footer{background:#0f1b2d;color:#c9d4e3}.footer-inner{padding:18px 20px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:14px}.footer-link{color:#9fd3ff}.page-header{display:flex;gap:16px;align-items:flex-end;justify-content:space-between;flex-wrap:wrap;margin-bottom:20px}.page-header-main{min-width:0}.page-title{font-size:26px;font-weight:700;margin:0;letter-spacing:-.01em}.page-subtitle{color:var(--c-muted);margin-top:4px}.page-actions{display:flex;gap:8px;flex-wrap:wrap}.back-btn{margin:0 0 8px -8px}.card{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;min-width:0}.card-flush{padding:0;overflow:hidden}.card-flush>.card-head{padding:16px 20px 0}.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px;flex-wrap:wrap}.card-title{font-size:17px;font-weight:650;margin:0}.card-actions{display:flex;gap:8px;flex-wrap:wrap}.card+.card{margin-top:16px}.stack>.card+.card,.grid-2>.card+.card,.grid-3>.card+.card,.grid-auto>.card+.card{margin-top:0}.hero{background:var(--g-brand);color:#fff;border-radius:var(--radius);padding:24px;display:flex;gap:20px;align-items:center;flex-wrap:wrap;box-shadow:var(--shadow)}.hero h1{margin:0;font-size:24px}.hero .muted{color:#ffffffd9}.stat{display:flex;flex-direction:column;gap:2px}.stat-value{font-size:26px;font-weight:700;line-height:1.1}.stat-label{font-size:13px;color:var(--c-muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:0 18px;border-radius:var(--radius-sm);border:1px solid transparent;font:inherit;font-weight:600;font-size:14px;cursor:pointer;text-decoration:none;white-space:nowrap;transition:background .15s,border-color .15s,color .15s,box-shadow .15s}.btn:hover{text-decoration:none}.btn:focus-visible,.icon-btn:focus-visible,.tab:focus-visible{outline:3px solid var(--c-primary-100);outline-offset:1px}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-sm{min-height:34px;padding:0 12px;font-size:13px}.btn-primary{background:var(--c-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--c-primary-600)}.btn-accent{background:var(--c-accent);color:#fff}.btn-accent:hover:not(:disabled){background:var(--c-accent-600)}.btn-secondary{background:var(--c-surface);color:var(--c-text);border-color:var(--c-border-2)}.btn-secondary:hover:not(:disabled){border-color:var(--c-primary);color:var(--c-primary-700)}.btn-ghost{background:transparent;color:var(--c-primary-700)}.btn-ghost:hover:not(:disabled){background:var(--c-primary-50)}.btn-danger{background:var(--c-danger-50);color:var(--c-danger);border-color:#f6c9c5}.btn-danger:hover:not(:disabled){background:var(--c-danger);color:#fff}.btn-block{width:100%}.field{display:flex;flex-direction:column;gap:6px;min-width:0}.field-label{font-size:13px;font-weight:600;color:var(--c-text-2)}.req{color:var(--c-red)}.field-error{font-size:12.5px;color:var(--c-danger)}.field-hint{font-size:12.5px;color:var(--c-muted)}.input,.select,.textarea{width:100%;min-height:42px;padding:9px 12px;border:1px solid var(--c-border-2);border-radius:var(--radius-sm);background:#fff;font:inherit;color:var(--c-text);transition:border-color .15s,box-shadow .15s}.textarea{min-height:90px;resize:vertical}.textarea.code{font-family:ui-monospace,Menlo,monospace;font-size:13px;min-height:220px}.input:focus,.select:focus,.textarea:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px var(--c-primary-100)}.field-invalid .input,.field-invalid .select,.field-invalid .textarea{border-color:var(--c-danger)}.input-sm{min-height:34px;padding:5px 10px;font-size:14px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 16px}.form-grid .span-2{grid-column:1 / -1}.form-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.checkbox-wrap{display:flex;flex-direction:column;gap:4px}.checkbox{display:flex;gap:10px;align-items:flex-start;font-size:14px;cursor:pointer}.checkbox input{width:18px;height:18px;margin:2px 0 0;accent-color:var(--c-primary);flex-shrink:0}.filters{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end;margin-bottom:14px}.filters .field{min-width:150px}.filters .field.grow{flex:1;min-width:200px}.table-wrap{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}.table{width:100%;border-collapse:collapse;font-size:14px}.table th,.table td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--c-border);vertical-align:middle}.table th{font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--c-muted);font-weight:600;background:var(--c-surface-2);white-space:nowrap}.table tbody tr:hover{background:#fafcff}.table tr:last-child td{border-bottom:0}.table .actions{white-space:nowrap;text-align:right}.table-clickable tbody tr{cursor:pointer}.badge{display:inline-flex;align-items:center;gap:4px;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:600;white-space:nowrap}.badge-wrap{white-space:normal}.badge-neutral{background:#eef2f7;color:var(--c-text-2)}.badge-success{background:var(--c-success-50);color:var(--c-success)}.badge-warning{background:var(--c-warning-50);color:var(--c-warning)}.badge-danger{background:var(--c-danger-50);color:var(--c-danger)}.badge-info{background:var(--c-primary-50);color:var(--c-primary-700)}.grade{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;font-weight:700;font-size:16px;flex-shrink:0}.grade-none{background:#eef2f7;color:var(--c-muted)}.grade-5{background:var(--c-success-50);color:var(--c-success)}.grade-4{background:var(--c-primary-50);color:var(--c-primary-700)}.grade-3{background:var(--c-warning-50);color:var(--c-warning)}.grade-2,.grade-1{background:var(--c-danger-50);color:var(--c-danger)}.progress-wrap{display:flex;align-items:center;gap:10px;min-width:120px}.progress{flex:1;height:8px;background:#e8eef6;border-radius:99px;overflow:hidden}.progress-bar{height:100%;background:var(--g-brand);border-radius:99px;transition:width .4s}.progress-label{font-size:13px;font-weight:600;color:var(--c-text-2);min-width:38px;text-align:right;white-space:nowrap}.avatar{border-radius:50%;background:var(--g-warm);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;overflow:hidden;flex-shrink:0}.avatar img{width:100%;height:100%;object-fit:cover}.avatar-edit{position:relative;display:inline-block}.avatar-edit label{position:absolute;right:-2px;bottom:-2px;width:34px;height:34px;border-radius:50%;background:#fff;color:var(--c-primary-700);display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow);cursor:pointer}.avatar-edit input{display:none}.alert{padding:12px 14px;border-radius:var(--radius-sm);font-size:14px;display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap;border:1px solid transparent}.alert-info{background:var(--c-primary-50);color:#0b4a85;border-color:var(--c-primary-100)}.alert-success{background:var(--c-success-50);color:#11612f;border-color:#c4ead2}.alert-warning{background:var(--c-warning-50);color:#8a4b06;border-color:#f7ddb0}.alert-error{background:var(--c-danger-50);color:#9b1c1c;border-color:#f6c9c5}.empty{text-align:center;padding:32px 16px;color:var(--c-muted)}.empty-title{font-weight:600;color:var(--c-text-2);font-size:16px;margin-bottom:4px}.loading{display:flex;gap:10px;align-items:center;justify-content:center;padding:40px 16px;color:var(--c-muted)}.spinner{width:22px;height:22px;border-radius:50%;border:3px solid var(--c-primary-100);border-top-color:var(--c-primary);animation:spin .8s linear infinite;display:inline-block}.spinner-inline{width:16px;height:16px;border-width:2px;border-color:#fff6;border-top-color:currentColor}@keyframes spin{to{transform:rotate(360deg)}}.tabs{display:flex;gap:4px;border-bottom:1px solid var(--c-border);margin-bottom:18px;overflow-x:auto;scrollbar-width:none}.tab{padding:10px 14px;border:0;background:none;font:inherit;font-weight:600;font-size:14px;color:var(--c-muted);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;white-space:nowrap}.tab:hover{color:var(--c-text)}.tab-active{color:var(--c-primary-700);border-bottom-color:var(--c-primary)}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f1b2d80;z-index:100;display:flex;align-items:flex-start;justify-content:center;padding:6vh 16px;overflow-y:auto}.modal{background:#fff;border-radius:var(--radius);width:100%;max-width:520px;box-shadow:var(--shadow-lg)}.modal-wide{max-width:860px}.modal-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--c-border)}.modal-head h3{margin:0;font-size:18px}.modal-body{padding:20px}.modal-foot{padding:14px 20px;border-top:1px solid var(--c-border);display:flex;gap:10px;justify-content:flex-end;flex-wrap:wrap}.toasts{position:fixed;bottom:20px;right:20px;z-index:200;display:flex;flex-direction:column;gap:8px}.toast{padding:12px 16px;border-radius:var(--radius-sm);color:#fff;box-shadow:var(--shadow-lg);font-size:14px;max-width:360px;animation:toastIn .2s}.toast-success{background:#0f1b2d}.toast-error{background:var(--c-danger)}@keyframes toastIn{0%{transform:translateY(8px);opacity:0}}.copy-field{display:flex;align-items:center;gap:8px;background:var(--c-surface-2);border:1px dashed var(--c-border-2);border-radius:var(--radius-sm);padding:4px 4px 4px 12px;min-width:0}.copy-label{font-size:12px;color:var(--c-muted);white-space:nowrap}.copy-value{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px}.kv{margin:0;display:grid;gap:8px}.kv-row{display:grid;grid-template-columns:180px 1fr;gap:12px;font-size:14px}.kv dt{color:var(--c-muted)}.kv dd{margin:0;word-break:break-word}.list{list-style:none;margin:0;padding:0}.list-item{display:flex;align-items:center;gap:14px;padding:14px 16px;border-bottom:1px solid var(--c-border);color:inherit}.list-item:last-child{border-bottom:0}a.list-item:hover{background:#fafcff;text-decoration:none}.list-item-main{flex:1;min-width:0}.list-item-title{font-weight:600}.list-item-sub{font-size:13px;color:var(--c-muted)}.list-item.locked{opacity:.55}.topic-item .topic-num{width:32px;height:32px;border-radius:50%;background:var(--c-primary-50);color:var(--c-primary-700);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;flex-shrink:0}.topic-item.visited{opacity:.55}.topic-item.visited .topic-num{background:var(--c-success-50);color:var(--c-success)}.course-card{display:flex;flex-direction:column;gap:12px;color:inherit;transition:box-shadow .15s,transform .15s}a.course-card:hover{text-decoration:none;box-shadow:var(--shadow-lg);transform:translateY(-1px)}.course-card h3{margin:0;font-size:18px}.topic-nav{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:16px}.topic-nav .btn{min-width:44px}.topic-nav .current{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}.topbar-user{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:14px}.content-html{font-size:15.5px;line-height:1.65}.content-html img{border-radius:var(--radius-sm);height:auto}.content-html table{border-collapse:collapse}.content-html td,.content-html th{border:1px solid var(--c-border);padding:6px 10px}.question{border:1px solid var(--c-border);border-radius:var(--radius);padding:18px;background:#fff}.question+.question{margin-top:14px}.question-head{display:flex;gap:10px;align-items:baseline;margin-bottom:12px}.question-num{font-weight:700;color:var(--c-primary-700);white-space:nowrap}.question-text{font-weight:600;white-space:pre-wrap}.question img{max-height:340px;border-radius:var(--radius-sm);margin-bottom:10px;display:block}.options{display:flex;flex-direction:column;gap:8px}.option{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border:1px solid var(--c-border-2);border-radius:var(--radius-sm);cursor:pointer;transition:border-color .15s,background .15s}.option:hover{border-color:var(--c-primary)}.option input{margin-top:3px;accent-color:var(--c-primary);width:17px;height:17px;flex-shrink:0}.option.selected{border-color:var(--c-primary);background:var(--c-primary-50)}.option.correct{border-color:var(--c-success);background:var(--c-success-50)}.option.wrong{border-color:var(--c-danger);background:var(--c-danger-50)}.feedback{margin-top:10px;font-size:14px;padding:10px 12px;border-radius:var(--radius-sm)}.feedback-ok{background:var(--c-success-50);color:#11612f}.feedback-bad{background:var(--c-danger-50);color:#9b1c1c}.exam-bar{position:sticky;top:calc(var(--header-h) + 8px);z-index:20;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;background:#fff;border:1px solid var(--c-border);border-radius:var(--radius);box-shadow:var(--shadow);padding:12px 16px;margin-bottom:16px}.timer{font-variant-numeric:tabular-nums;font-size:24px;font-weight:700;display:flex;align-items:center;gap:8px}.timer-warn{color:var(--c-danger)}.result-big{text-align:center;padding:24px 10px}.result-big .score{font-size:40px;font-weight:800;letter-spacing:-.02em}.result-big .grade{width:64px;height:64px;font-size:30px;border-radius:18px;margin-top:10px}.variant-pick{display:flex;gap:10px;flex-wrap:wrap}.variant-pick .btn{min-width:110px}.landing-hero{background:var(--g-brand);color:#fff;padding:56px 16px 64px}.landing-hero h1{font-size:36px;margin-bottom:10px;letter-spacing:-.02em}.landing-hero p{font-size:17px;opacity:.92;margin:0;max-width:640px}.landing-inner{max-width:1100px;margin:0 auto}.class-tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;margin-top:-36px}.class-tile{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--c-border);padding:22px;color:inherit;display:flex;flex-direction:column;gap:6px}.class-tile:hover{text-decoration:none;box-shadow:var(--shadow-lg)}.class-tile .big{font-size:34px;font-weight:800;color:var(--c-primary);line-height:1}.tariffs{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:18px}.tariff{display:flex;flex-direction:column;gap:10px;position:relative}.tariff.featured{border-color:var(--c-primary);box-shadow:0 0 0 2px var(--c-primary-100),var(--shadow)}.tariff-price{font-size:30px;font-weight:800;letter-spacing:-.02em}.tariff-price small{font-size:14px;font-weight:500;color:var(--c-muted)}.tariff ul{margin:0;padding-left:18px;color:var(--c-text-2);font-size:14px}.tariff .btn{margin-top:auto}.auth-wrap{min-height:calc(100vh - var(--header-h) - 60px);display:flex;align-items:center;justify-content:center;padding:32px 16px}.auth-card{width:100%;max-width:440px}.auth-card h1{font-size:24px}.summary-box{background:var(--c-surface-2);border:1px solid var(--c-border);border-radius:var(--radius-sm);padding:14px 16px}.summary-line{display:flex;justify-content:space-between;gap:10px;font-size:14px;padding:3px 0}.summary-line.total{font-weight:700;font-size:17px;border-top:1px solid var(--c-border);margin-top:6px;padding-top:8px}.faq details{border-bottom:1px solid var(--c-border);padding:12px 0}.faq details:last-child{border-bottom:0}.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:10px}.faq summary:after{content:"+";color:var(--c-primary);font-size:20px;line-height:1}.faq details[open] summary:after{content:"−"}.faq summary::-webkit-details-marker{display:none}.faq .answer{margin-top:8px;color:var(--c-text-2);white-space:pre-wrap}.notif{display:flex;gap:12px;padding:14px 16px;border-bottom:1px solid var(--c-border)}.notif:last-child{border-bottom:0}.notif.unread{background:#f5faff}.notif-mark{width:8px;height:8px;border-radius:50%;margin-top:7px;background:transparent;flex-shrink:0}.notif.unread .notif-mark{background:var(--c-primary)}.tree-item{display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--c-border)}.tree-item:last-child{border-bottom:0}.q-editor{border:1px solid var(--c-border);border-radius:var(--radius-sm);padding:14px;background:var(--c-surface-2)}.q-editor+.q-editor{margin-top:12px}.opt-row{display:flex;gap:8px;align-items:center;margin-top:6px}.opt-row .input{flex:1}.file-link{display:inline-flex;gap:6px;align-items:center;font-weight:500}.dropzone{border:2px dashed var(--c-border-2);border-radius:var(--radius);padding:18px;text-align:center;background:var(--c-surface-2)}.upload-progress{height:6px;background:#e8eef6;border-radius:99px;overflow:hidden;margin-top:8px}.upload-progress>div{height:100%;background:var(--c-primary);transition:width .2s}.pager{display:flex;align-items:center;gap:10px;justify-content:center;padding:14px;font-size:14px;color:var(--c-text-2)}.layout-side{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:16px;align-items:start}.side-sticky{position:sticky;top:calc(var(--header-h) + 16px)}@media(max-width:1024px){.content{padding:24px 20px 40px}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:860px){.burger{display:inline-flex}.sidebar{position:fixed;left:0;top:var(--header-h);bottom:0;height:auto;z-index:35;transform:translate(-100%);transition:transform .22s ease;box-shadow:var(--shadow-lg)}.sidebar-open{transform:translate(0)}.sidebar-backdrop{display:block;position:fixed;inset:var(--header-h) 0 0 0;background:#0f1b2d66;z-index:30}.content{padding:20px 16px 36px}.grid-2,.grid-3,.layout-side{grid-template-columns:1fr}.side-sticky{position:static}.form-grid{grid-template-columns:1fr}.kv-row{grid-template-columns:1fr;gap:0}.kv dt{font-size:12.5px}.page-title{font-size:22px}.landing-hero h1{font-size:28px}.header-inner{padding:0 10px;gap:6px}.logo img{height:34px}}@media(max-width:480px){.hide-xs{display:none}.header-right{gap:2px}.icon-btn{width:36px;height:36px}.card{padding:16px}.hero{padding:18px}.timer{font-size:20px}.toasts{left:16px;right:16px}.btn{white-space:normal;text-align:center}}.user-picker{position:relative;min-width:200px}.user-picker-list{position:absolute;z-index:30;left:0;right:0;top:calc(100% + 4px);max-height:280px;overflow-y:auto;background:#fff;border:1px solid var(--c-border);border-radius:10px;box-shadow:0 8px 24px #17202b1f}.user-picker-item{display:block;width:100%;text-align:left;padding:8px 12px;border:0;background:none;font:inherit;color:inherit;cursor:pointer}button.user-picker-item:hover{background:var(--c-primary-50)}.side-search{margin:4px 12px 8px}.qk-opt-body{display:flex;flex-direction:column;gap:6px;min-width:0;flex:1}.qk-opt-text{display:block;min-width:0;overflow-wrap:anywhere}.qk-opt-img{width:min(100%,320px);min-height:48px;max-height:220px;height:auto;border-radius:var(--radius-sm);border:1px solid var(--c-border);background:#fff;object-fit:contain}.question .qk-opt-img{margin-bottom:0;max-height:220px}.qk-num{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;min-width:26px;height:26px;padding:0 6px;border-radius:13px;background:var(--c-primary-50);color:var(--c-primary-700);font-weight:700;font-size:13.5px}.qk-num-l{background:#f1f3f7;color:#334155}.qk-match{display:flex;flex-direction:column;gap:12px}.qk-right{display:flex;flex-direction:column;gap:6px;padding:10px 12px;border:1px dashed var(--c-border-2);border-radius:var(--radius-sm)}.qk-right-item{display:flex;gap:10px;align-items:baseline}.qk-rows{display:flex;flex-direction:column;gap:8px}.qk-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,220px);gap:8px 12px;align-items:center;padding:8px 10px;border:1px solid var(--c-border-2);border-radius:var(--radius-sm);background:#fff}.qk-left{display:flex;gap:10px;align-items:baseline;min-width:0}.qk-select{width:100%;min-height:44px}.qk-hint{grid-column:1 / -1;font-size:13px;color:var(--c-danger)}.qk-row.correct,.qk-order-item.correct{border-color:var(--c-success);background:var(--c-success-50)}.qk-row.wrong,.qk-order-item.wrong{border-color:var(--c-danger);background:var(--c-danger-50)}.qk-order{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}.qk-order-item{display:flex;gap:10px;align-items:center;padding:8px 10px;border:1px solid var(--c-border-2);border-radius:var(--radius-sm);background:#fff}.qk-order-btns{display:flex;gap:6px;flex-shrink:0}.qk-mv{width:44px;height:44px;border-radius:var(--radius-sm);border:1px solid var(--c-border-2);background:#fff;font-size:20px;line-height:1;cursor:pointer;color:var(--c-primary-700)}.qk-mv:disabled{opacity:.35;cursor:default}.qk-mv:not(:disabled):hover{border-color:var(--c-primary)}.qk-review{display:flex;flex-direction:column;gap:8px}.qk-review-cols{display:grid;grid-template-columns:1fr 1fr;gap:14px}.qk-ed-block{margin-top:10px;display:flex;flex-direction:column;gap:6px}.qk-ed-row{display:flex;gap:6px;align-items:center}.qk-ed-row .input{flex:1;min-width:0}.qk-ed-row .select{width:auto;max-width:45%}.qk-ed-thumb{width:40px;height:40px;object-fit:contain;border:1px solid var(--c-border);border-radius:6px;background:#fff;flex-shrink:0}.qk-file{position:relative;overflow:hidden}.qk-file input{position:absolute;top:0;right:0;bottom:0;left:0;opacity:0;cursor:pointer}@media(max-width:640px){.qk-row,.qk-review-cols{grid-template-columns:1fr}}.mat-row{border:1px solid var(--c-border, #e3e8ee);border-radius:10px;padding:10px 12px;display:flex;flex-direction:column;gap:8px}.mat-row-main{display:flex;align-items:center;gap:8px;flex-wrap:wrap;min-width:0}.mat-row-main .input{min-width:160px}.mat-row-side{display:flex;align-items:center;gap:6px;flex-wrap:wrap;justify-content:flex-end}.mat-upload{border:1px dashed var(--c-border, #e3e8ee);border-radius:10px;padding:8px 12px}.mb-0{margin-bottom:0}.tutor-photo-row{display:flex;align-items:center;gap:16px}.tutor-photo-thumb{width:96px;height:96px;border-radius:12px;overflow:hidden;background:var(--bg-soft, #eef3f7);flex-shrink:0;display:flex;align-items:center;justify-content:center}.tutor-photo-thumb.sm{width:44px;height:44px;border-radius:8px}.tutor-photo-thumb img{width:100%;height:100%;object-fit:cover;object-position:center 22%}.tutor-subject-picks{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:6px 14px}.tutor-preview{padding:12px;border-radius:16px}.tutor-preview .stu-tutor{grid-template-columns:minmax(0,300px) minmax(0,1fr)}@media(max-width:760px){.tutor-preview .stu-tutor{grid-template-columns:1fr}}