:root{--blue:#1667d9;--blue2:#0d4fab;--ink:#172033;--muted:#6b7280;--line:#e5eaf2;--bg:#f6f8fb;--white:#fff;--green:#12835b;--red:#c73939;--orange:#b76a00;--shadow:0 10px 30px rgba(20,40,80,.07)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Roboto,"Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--bg);font-size:14px}.topbar{height:68px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100vw - 1500px)/2));position:sticky;top:0;z-index:30}.brand{display:flex;align-items:center;gap:11px}.brand .logo{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--blue),var(--blue2));color:#fff;font-weight:800;font-size:21px;box-shadow:0 5px 14px rgba(22,103,217,.25)}.brand strong{display:block;letter-spacing:.6px}.brand small{display:block;color:var(--muted);margin-top:2px}.topbar nav{display:flex;align-items:center;gap:22px}.topbar a,.breadcrumb a,table a{color:var(--blue);text-decoration:none}.container{max-width:1500px;margin:0 auto;padding:28px 24px 60px}.page-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:8px 0 24px}.page-head h1{font-size:30px;margin:0 0 7px}.page-head p,.section-head p{margin:0;color:var(--muted)}h1,h2,h3{letter-spacing:-.02em}button,.btn{border:0;background:var(--blue);color:#fff;border-radius:10px;padding:11px 16px;font-weight:700;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;font-size:14px}button:hover,.btn:hover{filter:brightness(.96)}.secondary{background:#eef4ff;color:var(--blue)}.ghost{background:#fff;color:var(--blue);border:1px solid #cfdcf4}.danger{background:var(--red)}.actions{display:flex;gap:10px}.grid{display:grid;gap:18px}.cards{grid-template-columns:repeat(auto-fill,minmax(290px,1fr))}.two{grid-template-columns:minmax(0,1.15fr) minmax(300px,.85fr)}.course-card,.card{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}.course-card{padding:22px;text-decoration:none;color:var(--ink);transition:.16s}.course-card:hover{transform:translateY(-2px);border-color:#b8cef1}.course-card h2{font-size:19px;margin:16px 0 6px}.course-card p{min-height:20px;color:var(--muted)}.course-card .meta{display:flex;gap:6px;color:var(--muted);margin-top:18px}.course-card .meta b{color:var(--ink);margin-left:8px}.card{padding:22px;margin-bottom:20px}.empty{color:var(--muted);display:grid;place-items:center;min-height:160px}.pill{display:inline-flex;padding:5px 9px;border-radius:999px;font-size:12px;font-weight:800;background:#eef2f7;color:#536174}.pill.green{background:#e8f7f0;color:var(--green)}.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px;margin-bottom:20px}.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}.stat b{display:block;font-size:28px}.stat span{color:var(--muted)}.tabs{display:flex;gap:24px;border-bottom:1px solid var(--line);margin:0 0 18px}.tabs a{text-decoration:none;color:var(--muted);padding:10px 2px 12px}.tabs a.active{color:var(--blue);border-bottom:2px solid var(--blue);font-weight:800}.section-head{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:18px}.section-head h1,.section-head h2{margin:0 0 5px}.table-wrap{overflow:auto;margin:0 -6px}table{width:100%;border-collapse:collapse;white-space:nowrap}th,td{padding:11px 12px;border-bottom:1px solid #edf0f5;text-align:left}th{font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:#657084;background:#fafbfc;position:sticky;top:0}.score{background:#f5f9ff}.muted,.hint{color:var(--muted)}label{display:block;font-weight:700;margin:0 0 15px}input,select,textarea{width:100%;margin-top:7px;border:1px solid #d8deea;background:#fff;border-radius:9px;padding:11px 12px;font:inherit;color:var(--ink);outline:none}input:focus,select:focus{border-color:#76a7e8;box-shadow:0 0 0 3px #e7f0ff}.form2{display:grid;grid-template-columns:1fr 1fr;gap:14px}.auth{max-width:430px;margin:70px auto}.auth h1{margin-top:0}.flash{padding:12px 14px;border-radius:10px;background:#eaf7ef;color:#176c4d;margin-bottom:16px}.flash.err{background:#fff0f0;color:#a62c2c}.breadcrumb{display:flex;gap:9px;color:var(--muted);margin-bottom:16px}.narrow{max-width:780px;margin-left:auto;margin-right:auto}.narrow-wide{max-width:1040px;margin-left:auto;margin-right:auto}.sample{margin-top:28px}.settings-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.formula{background:#f3f7fe;border:1px solid #dce8f8;border-radius:12px;padding:14px;margin:15px 0}.qr-layout{display:grid;grid-template-columns:minmax(500px,1.15fr) minmax(320px,.85fr);gap:20px}.qr-card{text-align:center}.qr-card .section-head{text-align:left}.qr-img{width:min(420px,80vw);height:auto;border:12px solid #fff;box-shadow:0 5px 30px rgba(0,0,0,.08);border-radius:14px}.countdown{height:8px;background:#e8edf5;border-radius:999px;overflow:hidden;max-width:420px;margin:18px auto 6px}.countdown>div{height:100%;background:var(--blue);transition:width .3s linear}.counttext{font-size:16px}.token-note{max-width:560px;margin:12px auto;color:var(--muted)}.qr-actions{display:flex;justify-content:center;gap:10px;margin-top:20px}.live-stats{display:grid;grid-template-columns:1fr 1fr;gap:10px}.live-stats>div{background:#f8fafc;border:1px solid var(--line);border-radius:12px;padding:16px}.live-stats b{display:block;font-size:28px}.live-stats span{color:var(--muted)}.student-page{min-height:100vh;display:grid;place-items:center;padding:18px;background:linear-gradient(180deg,#f2f7ff,#fff)}.student-box{width:min(470px,100%);margin:0;text-align:center}.student-box form{text-align:left}.center{justify-content:center;margin-bottom:22px}.success-big{width:72px;height:72px;border-radius:50%;background:#e5f8ef;color:var(--green);font-size:42px;font-weight:900;display:grid;place-items:center;margin:10px auto}dialog{border:0;border-radius:16px;padding:0;box-shadow:0 20px 70px rgba(0,0,0,.2);width:min(560px,calc(100vw - 30px))}dialog::backdrop{background:rgba(18,30,50,.35);backdrop-filter:blur(2px)}dialog form{padding:22px}.dialog-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.dialog-head h2{margin:0}.iconbtn{width:34px;height:34px;padding:0;border-radius:50%;background:#f2f4f7;color:#444;font-size:22px}footer{text-align:center;color:#8a93a3;padding:0 20px 35px}@media(max-width:900px){.two,.qr-layout{grid-template-columns:1fr}.stats{grid-template-columns:1fr 1fr 1fr}.settings-grid{grid-template-columns:1fr 1fr}.topbar nav span{display:none}.page-head,.section-head{align-items:flex-start}.page-head{flex-direction:column}.container{padding:20px 14px 50px}}@media(max-width:600px){.topbar{padding:0 14px}.brand small{display:none}.topbar nav{gap:12px}.stats{grid-template-columns:1fr}.form2,.settings-grid{grid-template-columns:1fr}.card{padding:16px;border-radius:13px}.actions{width:100%;flex-wrap:wrap}.qr-actions{flex-direction:column}.live-stats{grid-template-columns:1fr 1fr}.page-head h1{font-size:25px}}
.qr-canvas{margin:0 auto;padding:0;overflow:hidden;background:#fff}.qr-canvas canvas{display:block;width:100%;height:auto}

.student-tools{display:grid;grid-template-columns:minmax(260px,1fr) 190px auto auto;gap:10px;align-items:center;margin:0 0 12px}.student-tools input,.student-tools select{margin:0}.student-search{position:relative}.student-search input{padding-left:38px}.search-icon{position:absolute;left:13px;top:50%;transform:translateY(-50%);font-size:20px;color:#7b8799;pointer-events:none}.result-note{font-size:13px;color:var(--muted);margin:0 0 12px}.result-note b{color:var(--ink)}@media(max-width:760px){.student-tools{grid-template-columns:1fr 1fr}.student-search{grid-column:1/-1}.student-tools .btn,.student-tools button{width:100%}}@media(max-width:480px){.student-tools{grid-template-columns:1fr}.student-search{grid-column:auto}}

/* Student autocomplete - activity recording */
.student-autocomplete-label{margin-bottom:6px}.student-autocomplete{position:relative;margin-top:7px}.autocomplete-search input{margin:0}.student-suggestions{position:absolute;z-index:80;left:0;right:0;top:calc(100% + 6px);max-height:340px;overflow:auto;background:#fff;border:1px solid #d8deea;border-radius:12px;box-shadow:0 18px 45px rgba(20,40,80,.16);padding:6px}.student-suggestion{width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;background:#fff;color:var(--ink);padding:11px 12px;border-radius:9px;text-align:left;font-weight:400}.student-suggestion:hover,.student-suggestion.active{background:#eef5ff;filter:none}.suggestion-name{display:flex;align-items:baseline;gap:7px;min-width:0}.suggestion-name b{font-size:16px;color:#0d4fab}.suggestion-name span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.suggestion-meta{font-size:12px;color:var(--muted);white-space:nowrap}.student-suggestion-empty{padding:13px;color:var(--muted);text-align:center}.student-selected{display:flex;align-items:center;gap:10px;border:1px solid #bcd5f7;background:#f3f8ff;border-radius:11px;padding:11px 12px;margin:8px 0 10px}.student-selected>span:nth-child(2){display:flex;flex-direction:column;min-width:0}.student-selected small{color:var(--muted);margin-top:2px}.selected-check{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:#e4f6ee;color:var(--green);font-weight:900;flex:0 0 auto}.clear-student{margin-left:auto;background:#fff;color:var(--blue);border:1px solid #cfdcf4;padding:7px 10px}.autocomplete-hint{margin-top:0}@media(max-width:600px){.student-suggestion{align-items:flex-start;flex-direction:column;gap:4px}.suggestion-name{width:100%}.suggestion-meta{padding-left:0}}

/* V4 - roster actions, QR settings and manual adjustment */
.field-hint{display:block;color:var(--muted);font-size:12px;font-weight:400;margin-top:6px}.inline-delete{display:inline;margin:0}.delete-link{background:transparent;color:var(--red);padding:5px 7px;font-weight:700}.delete-link:hover{background:#fff0f0;filter:none}.info-note{background:#eef5ff;color:#31557e;border:1px solid #d6e5fb}.info-note b{color:#163e69}

/* V6 - export attendance to external-system XLSX structure */
.optional{font-size:12px;color:var(--muted);font-weight:400}.phase-export-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:22px}.phase-export-option{display:flex;align-items:flex-start;gap:12px;border:1px solid #d7e1ef;border-radius:13px;padding:15px;background:#fff;cursor:pointer}.phase-export-option:hover{border-color:#9fc0eb;background:#f8fbff}.phase-export-option input{width:auto;margin:3px 0 0;flex:0 0 auto}.phase-export-option span{display:flex;flex-direction:column;gap:5px}.phase-export-option b{font-size:16px;color:#174f96}.phase-export-option small{font-weight:400;color:var(--muted);line-height:1.45}.phase-export-option.is-disabled{opacity:.55;background:#f7f8fa;cursor:not-allowed}.export-section{margin-top:25px;padding-top:22px;border-top:1px solid var(--line)}.export-note{background:#f4f8ff;border:1px solid #dbe8fb;border-radius:11px;padding:13px 14px;color:#375a84;margin:4px 0 16px;line-height:1.55}.export-button{min-width:280px}@media(max-width:700px){.phase-export-grid{grid-template-columns:1fr}.export-button{width:100%;min-width:0}}

/* V8 - multi-teacher administration */
.admin-actions{display:flex;gap:6px;align-items:center}.mini{padding:7px 10px;font-size:12px;border-radius:8px;white-space:nowrap}.topbar nav a{white-space:nowrap}@media(max-width:700px){.admin-actions{min-width:235px}.topbar nav a{font-size:13px}}