:root{color-scheme:light;--bg:#f5f7fb;--surface:#fff;--surface-2:#f0f4f8;--text:#172033;--muted:#6b7280;--border:#e2e8f0;--primary:#1d6f55;--primary-2:#123d31;--sidebar:#101827;--sidebar-text:#dbe4f0;--shadow:0 8px 24px rgba(16,24,39,.06);--danger-bg:#fee2e2;--danger:#991b1b;--ok-bg:#dcfce7;--ok:#166534;--warning-bg:#fef3c7;--warning:#92400e}
html[data-theme="dark"]{color-scheme:dark;--bg:#0b1120;--surface:#111827;--surface-2:#182235;--text:#e5edf7;--muted:#9aa8bc;--border:#263349;--primary:#35a77c;--primary-2:#17684d;--sidebar:#070c16;--sidebar-text:#dbe4f0;--shadow:0 8px 28px rgba(0,0,0,.22);--danger-bg:#3b151b;--danger:#fecaca;--ok-bg:#0f3528;--ok:#bbf7d0;--warning-bg:#3b2d10;--warning:#fde68a}
*{box-sizing:border-box}html{background:var(--bg)}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);transition:background .2s,color .2s}a{color:inherit}.app{display:grid;grid-template-columns:260px 1fr;min-height:100vh}.side{background:var(--sidebar);color:var(--sidebar-text);padding:22px 18px;position:sticky;top:0;height:100vh;overflow:auto}.brand{display:flex;gap:10px;align-items:center;font-weight:850;font-size:20px;margin-bottom:24px}.brand b{display:grid;place-items:center;width:36px;height:36px;border-radius:12px;background:#5ee0a0;color:#0d3626}.nav-title{font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:#8290a5;margin:20px 12px 7px;font-weight:800}.nav a{display:flex;gap:9px;padding:10px 12px;border-radius:10px;text-decoration:none;margin:3px 0;color:#cbd5e1}.nav a:hover,.nav a.active{background:#1f2a3d;color:white}.main{padding:28px;min-width:0}.top{display:flex;justify-content:space-between;gap:18px;align-items:center;margin-bottom:24px}.title h1{margin:0;font-size:27px}.muted{color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}.col-3{grid-column:span 3}.col-4{grid-column:span 4}.col-5{grid-column:span 5}.col-6{grid-column:span 6}.col-7{grid-column:span 7}.col-8{grid-column:span 8}.col-9{grid-column:span 9}.col-12{grid-column:span 12}.card{background:var(--surface);border:1px solid var(--border);border-radius:17px;padding:18px;box-shadow:var(--shadow)}.card h2,.card h3{margin-top:0}.stat{font-size:30px;font-weight:850;margin-top:8px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border:0;border-radius:10px;padding:10px 14px;text-decoration:none;font-weight:750;cursor:pointer;font:inherit}.btn.primary{background:var(--primary);color:#fff}.btn.secondary{background:var(--surface-2);color:var(--text);border:1px solid var(--border)}.btn.danger{background:var(--danger-bg);color:var(--danger)}.btn.warning{background:var(--warning-bg);color:var(--warning)}.btn.small{padding:7px 10px;font-size:13px}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.spread{justify-content:space-between}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.form-grid .full{grid-column:1/-1}label{display:block;font-size:13px;font-weight:700;color:var(--muted);margin-bottom:11px}input,select,textarea{width:100%;margin-top:6px;padding:10px 11px;border:1px solid var(--border);border-radius:10px;background:var(--surface);color:var(--text);font:inherit;outline:none}input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--primary) 18%,transparent)}textarea{min-height:96px;resize:vertical}.table-wrap{overflow:auto;border:1px solid var(--border);border-radius:12px}table{width:100%;border-collapse:collapse;min-width:680px}th,td{padding:11px 10px;border-bottom:1px solid var(--border);text-align:left;font-size:14px;vertical-align:top}tr:last-child td{border-bottom:0}th{font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);background:var(--surface-2)}.badge{display:inline-block;border-radius:999px;padding:5px 9px;font-size:11px;font-weight:850;background:var(--surface-2);border:1px solid var(--border)}.badge.open,.badge.present,.badge.published,.badge.paid,.badge.active,.badge.turned_in{background:var(--ok-bg);color:var(--ok)}.badge.late,.badge.pending,.badge.missing{background:var(--warning-bg);color:var(--warning)}.badge.absent,.badge.cancelled,.badge.failed,.badge.expired,.badge.closed{background:var(--danger-bg);color:var(--danger)}.badge.returned{background:#e0e7ff;color:#3730a3}.notice{padding:12px 14px;border-radius:12px;margin-bottom:16px}.notice.ok{background:var(--ok-bg);color:var(--ok)}.notice.err{background:var(--danger-bg);color:var(--danger)}.notice.warn{background:var(--warning-bg);color:var(--warning)}.hero{background:linear-gradient(135deg,var(--primary-2),var(--primary));color:white;padding:26px;border-radius:18px}.hero .muted{color:#cfe8df}.kpi{font-size:13px;color:var(--muted)}.actions{display:flex;gap:6px;flex-wrap:wrap}.login-page{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at top left,color-mix(in srgb,var(--primary) 14%,var(--bg)),var(--bg) 52%);padding:20px}.login{width:min(460px,100%)}.codebox{background:var(--surface-2);border:1px dashed var(--border);padding:12px;border-radius:10px;word-break:break-all}.mobile-toggle{display:none}.print-only{display:none}.theme-toggle{width:42px;height:42px;border-radius:12px;padding:0;font-size:18px}.qr-card{text-align:center}.qr-box{display:inline-flex;background:white;padding:14px;border-radius:18px;border:1px solid #e5e7eb;margin:8px auto 12px;min-width:248px;min-height:248px;align-items:center;justify-content:center}.qr-box img,.qr-box canvas{max-width:220px!important;max-height:220px!important}.pricing{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.plan{position:relative;display:flex;flex-direction:column}.plan.popular{border:2px solid var(--primary)}.plan-tag{position:absolute;top:12px;right:12px}.price{font-size:34px;font-weight:900;margin:10px 0}.feature-list{padding-left:19px;color:var(--muted);line-height:1.8;flex:1}.stream-item{display:grid;grid-template-columns:44px 1fr;gap:12px;padding:15px 0;border-bottom:1px solid var(--border)}.stream-item:last-child{border-bottom:0}.avatar{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--surface-2);font-weight:850}.assignment-card{border-left:4px solid var(--primary)}.submission-file{display:inline-flex;gap:8px;align-items:center;padding:9px 11px;border:1px solid var(--border);border-radius:10px;text-decoration:none;background:var(--surface-2)}.divider{height:1px;background:var(--border);margin:18px 0}.progress{height:8px;background:var(--surface-2);border-radius:99px;overflow:hidden}.progress>span{display:block;height:100%;background:var(--primary)}.side-user{margin-top:28px;border-top:1px solid #263248;padding-top:18px}.side-user .email{font-size:12px;color:#8fa0b7}.subscription-pill{font-size:11px;padding:6px 8px;background:#173d31;border-radius:8px;margin-top:8px;color:#bbf7d0}.swal2-popup{font-family:inherit!important;background:var(--surface)!important;color:var(--text)!important}.swal2-title,.swal2-html-container{color:var(--text)!important}
@media(max-width:1000px){.pricing{grid-template-columns:1fr 1fr}.app{display:block}.side{position:fixed;z-index:30;left:-280px;width:260px;transition:.2s}.side.open{left:0}.main{padding:18px}.mobile-toggle{display:inline-flex}.col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9{grid-column:span 12}.form-grid{grid-template-columns:1fr}.top{align-items:flex-start}.title h1{font-size:23px}}
@media(max-width:640px){.pricing{grid-template-columns:1fr}.main{padding:14px}.top{gap:10px}.card{padding:15px}.qr-box{min-width:220px;min-height:220px}.qr-box img,.qr-box canvas{max-width:190px!important;max-height:190px!important}.price{font-size:30px}}
@media print{.side,.top .actions,.no-print,.btn{display:none!important}.app{display:block}.main{padding:0}.card{box-shadow:none}.print-only{display:block}}
/* DosenHub v2.1 - professional navigation & notifications */
.nav a{align-items:center;gap:11px;position:relative;font-weight:650}.nav a i{width:20px;text-align:center;font-size:16px;color:#91a4bc;transition:.18s}.nav a:hover i,.nav a.active i{color:#7cf0b5}.nav a.active:before{content:"";position:absolute;left:-18px;top:9px;bottom:9px;width:3px;border-radius:4px;background:#5ee0a0}.side-user-head{display:flex;align-items:center;gap:10px}.user-avatar{width:36px;height:36px;border-radius:11px;display:grid;place-items:center;background:#1f2a3d;color:#8debb9}.subscription-pill{display:flex;align-items:center;gap:6px}.notify-class-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.notify-class-card{display:grid;grid-template-columns:44px 1fr 20px;align-items:center;gap:12px;padding:14px;border:1px solid var(--border);border-radius:14px;text-decoration:none;background:var(--surface);transition:.18s}.notify-class-card:hover{transform:translateY(-1px);border-color:color-mix(in srgb,var(--primary) 45%,var(--border));box-shadow:var(--shadow)}.notify-class-card small{display:block;margin-top:4px;color:var(--muted)}.notify-class-icon{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;background:color-mix(in srgb,var(--primary) 12%,var(--surface));color:var(--primary);font-size:19px}.contact-stat{display:flex;justify-content:space-between;align-items:center;padding:11px 0;border-bottom:1px solid var(--border)}.contact-stat span{display:flex;align-items:center;gap:8px}.contact-stat:last-of-type{border-bottom:0}.notify-big-icon{font-size:30px;color:var(--primary);opacity:.8}.channel-picker{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:8px}.channel-option{display:grid;grid-template-columns:auto 42px 1fr;gap:10px;align-items:center;border:1px solid var(--border);border-radius:13px;padding:12px;margin:0;background:var(--surface-2);cursor:pointer}.channel-option input{width:auto;margin:0}.channel-option small{display:block;margin-top:2px;font-weight:500;color:var(--muted)}.channel-icon{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:#eaf2ff;color:#1d4ed8;font-size:18px}.channel-icon.whatsapp{background:#dcfce7;color:#15803d}.error-detail{max-width:420px;white-space:pre-wrap;font:12px/1.5 ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--danger);background:var(--danger-bg);padding:8px;border-radius:8px}.switch-row{padding:11px 12px;border:1px solid var(--border);border-radius:12px;background:var(--surface-2);margin-bottom:14px}.qr-card .actions,.qr-card .row{row-gap:8px}
@media(max-width:760px){.notify-class-grid,.channel-picker{grid-template-columns:1fr}.nav a{padding:11px 12px}.notify-class-card{grid-template-columns:42px 1fr 18px}}
.publish-notify-box{border:1px solid var(--border);background:var(--surface-2);padding:12px;border-radius:12px;margin:4px 0 14px}.publish-notify-box label{margin:7px 0}.contact-ok{display:inline-flex;gap:6px;align-items:center;color:var(--text)}.contact-ok i{color:var(--primary)}
.inline-edit{position:relative}.inline-edit summary{list-style:none}.inline-edit summary::-webkit-details-marker{display:none}.inline-edit-panel{position:absolute;right:0;top:40px;z-index:20;width:300px;padding:14px;border:1px solid var(--border);border-radius:14px;background:var(--surface);box-shadow:0 18px 46px rgba(0,0,0,.18)}@media(max-width:640px){.inline-edit-panel{position:fixed;left:14px;right:14px;top:90px;width:auto}}

/* ============================================================
   DosenHub v2.2 - mobile fixed header, profile photo & trial UI
   ============================================================ */
.user-avatar-photo{overflow:hidden;text-decoration:none;flex:0 0 auto}.user-avatar-photo img,.top-profile-link img,.profile-photo-preview img{width:100%;height:100%;object-fit:cover;display:block}.user-avatar-photo span{font-size:12px;font-weight:900}.side-user-meta{min-width:0}.side-user-name{font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.top-profile-link{width:42px;height:42px;border-radius:13px;overflow:hidden;display:grid;place-items:center;text-decoration:none;background:var(--surface-2);border:1px solid var(--border);font-size:12px;font-weight:900;color:var(--text);flex:0 0 auto}.top-profile-link:hover{border-color:color-mix(in srgb,var(--primary) 55%,var(--border))}.profile-photo-editor{display:grid;grid-template-columns:116px 1fr;gap:18px;align-items:center}.profile-photo-preview{width:116px;height:116px;border-radius:24px;overflow:hidden;background:linear-gradient(145deg,color-mix(in srgb,var(--primary) 18%,var(--surface-2)),var(--surface-2));border:1px solid var(--border);display:grid;place-items:center;font-size:30px;font-weight:900;color:var(--primary)}.profile-photo-fields{min-width:0}.trial-admin-box{padding:13px;border:1px solid color-mix(in srgb,var(--primary) 30%,var(--border));border-radius:13px;background:color-mix(in srgb,var(--primary) 6%,var(--surface));margin:4px 0 12px}.badge.trial{background:#ede9fe;color:#6d28d9;border-color:#ddd6fe}.plan-badges{min-height:30px;margin-bottom:4px}.plan-actions{display:grid;gap:9px;margin-top:16px}.feature-list li{margin-bottom:3px}.feature-list li i{color:var(--primary);margin-right:3px}.btn:disabled{opacity:.55;cursor:not-allowed;filter:saturate(.55)}
html[data-theme="dark"] .badge.trial{background:#2e2150;color:#ddd6fe;border-color:#4c367c}

@media(max-width:1000px){
  .top{position:fixed;top:0;left:0;right:0;z-index:25;margin:0;padding:11px 16px;background:color-mix(in srgb,var(--surface) 92%,transparent);border-bottom:1px solid var(--border);box-shadow:0 8px 24px rgba(15,23,42,.08);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);align-items:center;min-height:72px}
  .main{padding-top:96px}
  .top-left{min-width:0;flex-wrap:nowrap}.top .title{min-width:0}.top .title h1{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.top-subtitle{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:52vw}.top-actions{flex-wrap:nowrap;margin-left:auto;max-width:52vw;overflow-x:auto;scrollbar-width:none}.top-actions::-webkit-scrollbar{display:none}.top-actions .btn{white-space:nowrap;flex:0 0 auto}
}
@media(max-width:640px){
  .main{padding:88px 14px 14px}.top{min-height:66px;padding:9px 12px;gap:8px}.top .title h1{font-size:18px;line-height:1.15}.top-subtitle{display:none}.mobile-toggle,.theme-toggle,.top-profile-link{width:40px;height:40px;padding:0}.profile-photo-editor{grid-template-columns:1fr;text-align:center}.profile-photo-preview{margin:0 auto}.profile-photo-fields{text-align:left}.side{z-index:35}
}
.student-modal{width:min(520px,calc(100% - 28px));padding:0;border:0;border-radius:18px;background:var(--surface);color:var(--text);box-shadow:0 25px 90px rgba(0,0,0,.28)}.student-modal::backdrop{background:rgba(15,23,42,.62);backdrop-filter:blur(4px)}.student-modal form{margin:0}.student-modal-header,.student-modal-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 20px;border-bottom:1px solid var(--border)}.student-modal-footer{border-bottom:0;border-top:1px solid var(--border);justify-content:flex-end}.student-modal-header h3{margin:4px 0 0}.student-modal-body{padding:20px}.modal-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--border);background:var(--surface-2);color:var(--text);cursor:pointer}.eyebrow{font-size:10px;letter-spacing:.12em;font-weight:850;color:var(--primary)}

/* ============================================================
   DosenHub v2.3 - multi-period billing discounts
============================================================ */
.discount-admin-box{padding:14px;border:1px solid color-mix(in srgb,var(--primary) 28%,var(--border));border-radius:14px;background:color-mix(in srgb,var(--primary) 5%,var(--surface));margin:8px 0 14px}.billing-direct-pay{margin-top:10px;border:1px solid var(--border);border-radius:12px;background:var(--surface-2)}.billing-direct-pay>summary{cursor:pointer;padding:11px 12px;text-align:center;font-size:13px;font-weight:750;color:var(--muted);list-style:none}.billing-direct-pay>summary::-webkit-details-marker{display:none}.billing-direct-pay[open]>summary{border-bottom:1px solid var(--border)}.billing-period-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:10px}.billing-direct-pay .billing-period-grid{padding:10px;margin-top:0}.billing-period-card{position:relative;display:flex;flex-direction:column;gap:6px;padding:12px;border:1px solid var(--border);border-radius:13px;background:var(--surface);margin:0}.billing-period-card.best-value{border-color:color-mix(in srgb,var(--primary) 65%,var(--border));box-shadow:0 0 0 2px color-mix(in srgb,var(--primary) 9%,transparent)}.billing-period-title{gap:6px}.discount-chip{display:inline-flex;padding:4px 7px;border-radius:999px;background:var(--ok-bg);color:var(--ok);font-size:11px;font-weight:900}.billing-normal-price{text-decoration:line-through;color:var(--muted);font-size:13px}.billing-final-price{font-size:20px;font-weight:900;color:var(--text)}.billing-saving{font-size:11px;line-height:1.45;min-height:31px}.billing-period-card .btn{width:100%;margin-top:3px}.best-value-label{position:absolute;top:-9px;right:10px;background:var(--primary);color:#fff;border-radius:999px;padding:3px 7px;font-size:9px;font-weight:900;letter-spacing:.04em;text-transform:uppercase}.billing-summary-box{padding:14px;border-radius:14px;border:1px solid var(--border);background:var(--surface-2);margin-bottom:14px}.billing-summary-box .row{margin:5px 0}.discount-text{color:var(--ok);font-weight:800}.small-price{font-size:11px;margin-top:2px}.discount-preview-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px;margin-top:10px}.discount-preview-grid>div{padding:9px;border:1px solid var(--border);border-radius:10px;background:var(--surface);display:grid;gap:2px}.discount-preview-grid span{font-size:11px;color:var(--ok);font-weight:850}.discount-preview-grid small{font-weight:800}
@media(max-width:640px){.billing-period-grid{grid-template-columns:1fr}.discount-preview-grid{grid-template-columns:1fr 1fr}.billing-final-price{font-size:22px}}

/* ============================================================
   DosenHub v2.4 - Meeting reports, photos & PDF
============================================================ */
.report-meta-list{display:grid;gap:0;border:1px solid var(--border);border-radius:13px;overflow:hidden}.report-meta-list>div{display:grid;grid-template-columns:105px 1fr;gap:10px;padding:10px 11px;border-bottom:1px solid var(--border);font-size:13px}.report-meta-list>div:last-child{border-bottom:0}.report-meta-list span{color:var(--muted)}.report-meta-list strong{min-width:0;overflow-wrap:anywhere}.report-attendance-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.report-attendance-grid>div{padding:10px 5px;border:1px solid var(--border);border-radius:11px;text-align:center;background:var(--surface-2)}.report-attendance-grid b{display:block;font-size:20px}.report-attendance-grid span{display:block;font-size:10px;color:var(--muted);margin-top:2px}.report-attendance-grid .ok b{color:var(--ok)}.report-attendance-grid .warning b{color:var(--warning)}.report-attendance-grid .danger b{color:var(--danger)}.report-journal-note{padding:12px;border-radius:12px;background:var(--surface-2);border:1px solid var(--border);white-space:pre-wrap;line-height:1.6;font-size:13px}.report-form-heading{margin-bottom:15px}.meeting-photo-section{margin-top:18px;padding-top:18px;border-top:1px solid var(--border)}.meeting-photo-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:13px 0}.meeting-photo-item{border:1px solid var(--border);border-radius:13px;overflow:hidden;background:var(--surface-2);min-width:0}.meeting-photo-preview{display:block}.meeting-photo-item img{display:block;width:100%;height:145px;object-fit:cover;background:var(--surface-2)}.meeting-photo-info{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:8px 9px}.meeting-photo-info small{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}.meeting-photo-uploader{display:flex;flex-direction:column;gap:4px;padding:18px;border:1.5px dashed color-mix(in srgb,var(--primary) 50%,var(--border));border-radius:14px;background:color-mix(in srgb,var(--primary) 4%,var(--surface));cursor:pointer;margin-top:12px}.meeting-photo-uploader>span{display:flex;align-items:center;gap:8px;font-weight:800;color:var(--primary)}.meeting-photo-uploader>small{color:var(--muted)}.meeting-photo-uploader input{margin-top:8px;background:var(--surface)}.new-photo-preview .pending{border-style:dashed;border-color:color-mix(in srgb,var(--primary) 55%,var(--border))}.report-save-actions{margin-top:18px;padding-top:16px;border-top:1px solid var(--border)}.meeting-report-info{display:flex;gap:11px;align-items:flex-start;padding:12px;border-radius:13px;background:var(--surface-2);border:1px solid var(--border)}.meeting-report-info>i{font-size:22px;color:var(--primary)}.meeting-report-info small{display:block;color:var(--muted);line-height:1.5;margin-top:3px}.meeting-row-actions{flex-wrap:wrap}.empty-state{display:grid;place-items:center;text-align:center;gap:5px;padding:35px;color:var(--muted)}.empty-state>i{font-size:30px;color:var(--primary)}.empty-state>b{color:var(--text)}
@media(max-width:900px){.meeting-report-layout>.col-4,.meeting-report-layout>.col-8{grid-column:span 12}.meeting-photo-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.report-attendance-grid{grid-template-columns:repeat(5,1fr)}}
@media(max-width:640px){.meeting-photo-grid{grid-template-columns:1fr 1fr}.meeting-photo-item img{height:120px}.report-attendance-grid{grid-template-columns:repeat(3,1fr)}.report-save-actions{align-items:stretch}.report-save-actions>.actions{width:100%}.report-save-actions>.actions .btn{flex:1}.report-meta-list>div{grid-template-columns:90px 1fr}}

/* ============================================================
   DosenHub v2.5 - Teaching material PDF gallery
============================================================ */
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@media(max-width:900px){.material-class-grid,.teaching-material-grid{grid-template-columns:1fr}}
@media(max-width:640px){.material-class-card{grid-template-columns:42px 1fr 16px;padding:12px}.material-class-icon{width:42px;height:42px}.material-actions .btn{flex:1}.material-actions form{display:flex;flex:1}.material-actions form .btn{width:100%}}

/* ============================================================
   DosenHub v2.6 - Digital Teaching Assistant
============================================================ */
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@media(max-width:900px){.smart-overview-grid>.col-4{grid-column:span 12}.smart-filter-card .spread{align-items:stretch}.smart-class-meta{width:100%}}
@media(max-width:640px){.ai-chat-question{margin-left:10px}.ai-chat-answer{margin-right:10px}.public-ai-body{padding:18px 12px}.public-ai-head h1{font-size:22px}}