:root{color-scheme:dark;--bg:#15151b;--panel:#1c1b25;--line:#393345;--text:#f3f0fa;--muted:#b6afc5;--accent:#b98aff}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(ellipse 75% 280px at 100% 0,rgba(103,30,190,.42),transparent 80%),radial-gradient(ellipse 70% 230px at 0 0,rgba(70,65,170,.38),transparent 80%),var(--bg);background-repeat:no-repeat;color:var(--text);font:15px/1.6 system-ui,sans-serif}button,input,textarea,select{font:inherit}button,a,input,textarea,select{outline-offset:4px}button{cursor:pointer}a{color:var(--accent)}.shell{max-width:1280px;margin:auto;padding:30px 42px}header{display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);padding-bottom:24px}.brand{font-size:24px;font-weight:850;letter-spacing:-1px}.brand em{font-style:normal;color:var(--accent)}.label{font-size:11px;letter-spacing:2px;text-transform:uppercase;color:var(--accent);font-weight:700}h1{font-size:clamp(30px,5vw,54px);line-height:1.12;letter-spacing:-2px;margin:15px 0}h2{font-size:23px;line-height:1.3;margin:6px 0 16px;letter-spacing:-.6px}h3{margin:0}p{color:var(--muted)}.hero{padding:40px 0 30px;display:flex;align-items:center;justify-content:space-between;gap:25px}.hero p{max-width:610px}.badge{border:1px solid var(--line);border-radius:30px;padding:7px 14px;font-size:12px;color:var(--muted)}.btn{background:var(--accent);color:#1a1029;border:0;border-radius:8px;padding:11px 17px;font-weight:700}.btn.secondary{background:transparent;color:var(--text);border:1px solid var(--line)}.btn.danger{background:transparent;color:#f0aaa0;border:1px solid #64413c;padding:6px 10px;font-size:12px}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.layout{display:grid;grid-template-columns:260px 1fr;gap:25px}.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:24px;margin-bottom:22px}.sidebar{align-self:start}.student{width:100%;text-align:left;background:transparent;border:1px solid transparent;border-radius:8px;padding:12px;color:var(--text);margin:3px 0}.student.active{background:#30243f;border-color:#9368c0}.student small{display:block;color:var(--muted)}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin-bottom:24px}.stat{border:1px solid var(--line);padding:18px;border-radius:12px}.stat strong{font-size:30px;display:block;color:var(--accent)}.stat span{font-size:12px;color:var(--muted)}label{display:block;font-size:12px;color:var(--muted);margin:10px 0 5px}input,textarea,select{width:100%;background:#16151e;color:var(--text);border:1px solid #51465f;border-radius:7px;padding:10px 12px}textarea{min-height:100px;resize:vertical}form .btn{margin-top:16px}.formgrid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.full{grid-column:1/-1}.calendar{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:7px;margin-top:18px}.weekday{font-size:10px;text-align:center;color:var(--muted);padding:8px 0}.day{min-height:82px;border:1px solid #393345;background:transparent;border-radius:8px;text-align:left;color:var(--muted);padding:10px}.day.planned{border-color:#9368c0;color:var(--text);background:#30243f}.day.selected{box-shadow:0 0 0 2px var(--accent)}.day.done{background:#392956}.day strong{display:block}.day small{display:block;font-size:10px;line-height:1.4;margin-top:7px;overflow-wrap:anywhere}.columns{display:grid;grid-template-columns:1fr 1fr;gap:22px}.entry{border-top:1px solid var(--line);padding:16px 0}.entry p{white-space:pre-wrap;margin:6px 0}.entry .row{justify-content:space-between}.empty{padding:25px 0;color:var(--muted);font-size:13px}.auth{min-height:100vh;display:grid;grid-template-columns:1.15fr 1fr}.authintro{padding:10vw 7vw;background:radial-gradient(ellipse at top left,rgba(88,58,173,.22),transparent 65%);display:flex;flex-direction:column;justify-content:center}.authintro h1{font-size:clamp(44px,5vw,76px);max-width:600px}.authintro .brand{margin-bottom:60px}.authform{display:flex;justify-content:center;align-items:center;padding:35px}.authform .card{width:100%;max-width:430px}.authform .btn{width:100%}.error{color:#ffb8aa;font-size:13px;min-height:20px}.progress{height:5px;background:#393044;border-radius:8px;margin-top:12px;overflow:hidden}.progress span{display:block;height:100%;background:var(--accent)}#toast{position:fixed;bottom:24px;right:24px;max-width:350px;background:var(--accent);color:#1a1029;padding:12px 20px;border-radius:10px;display:none;z-index:100}details summary{cursor:pointer;font-weight:600}footer{margin-top:24px;color:var(--muted);font-size:12px;border-top:1px solid var(--line);padding-top:22px}.selected-session{margin-top:22px;border-top:1px solid var(--line);padding-top:22px}.selected-session p{white-space:pre-wrap}button:disabled{opacity:.5;cursor:wait}@media(max-width:850px){.shell{padding:22px}.layout,.columns,.auth{grid-template-columns:1fr}.authintro{padding:45px 30px}.authintro .brand{margin-bottom:25px}.authintro h1{font-size:44px}.sidebar .student{width:auto;display:inline-block}.hero{align-items:flex-start}.stats{gap:8px}.stat{padding:12px}.calendar{gap:4px}.day{padding:7px;min-height:72px}.day small{font-size:9px}.card{padding:18px}}@media(max-width:480px){header{align-items:flex-start}.brand{font-size:21px}.hero{display:block}.hero .badge{display:inline-block}.formgrid{grid-template-columns:1fr}.stats strong{font-size:25px}.row .btn{padding:8px 12px}.day small{display:none}.day.planned:after{content:'●';color:var(--accent);font-size:9px}.authintro h1{font-size:37px}}

.between{justify-content:space-between}.check{width:auto}.spaced{margin-bottom:20px}
.brand-logo{display:block;width:210px;height:auto}.authintro .brand-logo{width:340px;max-width:100%}@media(max-width:480px){.brand-logo{width:145px}.authintro .brand-logo{width:260px}}
.topic-fields{padding-bottom:16px}.topic-select{display:block;margin-top:10px}#session-focus{scroll-margin-top:24px}
[hidden]{display:none!important}.session-overlay{position:fixed;inset:0;background:rgba(0,0,0,.75);z-index:50;display:flex;align-items:center;justify-content:center;padding:20px}.session-modal{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:24px;width:min(600px,100%);max-height:90vh;overflow-y:auto;margin:0;box-shadow:0 20px 80px #0008}.modal-close{display:block;margin-left:auto;margin-bottom:18px}body:has(.session-overlay:not([hidden])){overflow:hidden}
.auth-links{display:flex;flex-direction:column;gap:12px;margin-top:22px}.text-button{border:0;background:none;color:var(--accent);padding:0;text-decoration:underline;cursor:pointer;font:inherit;text-align:left}

.layout>main{min-width:0}.activity-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:22px 0}.activity-grid div{padding:14px;background:var(--bg);border:1px solid var(--line);border-radius:10px}.activity-grid dt{font-size:12px;color:var(--muted)}.activity-grid dd{margin:5px 0 0;font-weight:600;overflow-wrap:anywhere}.study-progress{display:block;width:100%;height:12px;margin:14px 0 20px;accent-color:var(--accent)}.activity-note{font-size:12px;margin-bottom:0}.activity-sessions{max-height:340px;overflow:auto;margin-top:12px}.activity-sessions .student{border:1px solid var(--line);display:block;width:100%}.activity-sessions small{white-space:pre-wrap;overflow-wrap:anywhere}@media(max-width:560px){.activity-grid{grid-template-columns:1fr}.monitoring .between{align-items:flex-start}}

.day-status{display:block;font-size:10px;margin-top:7px;color:var(--muted)}.day.done .day-status{color:var(--accent)}.lesson-state{padding:14px;border:1px solid var(--line);border-radius:10px}.lesson-state.completed{color:var(--accent);background:#30243f}.lesson-actions{display:flex;flex-wrap:wrap;gap:10px}.lesson-actions .btn{flex:1}@media(max-width:480px){.day-status{font-size:9px}.lesson-actions{flex-direction:column}}

/* Purple theme: shared by login, teacher, student and session dialogs. */
.btn{box-shadow:0 4px 18px rgba(142,76,223,.18);transition:background .18s,border-color .18s,box-shadow .18s}
.btn:hover:not(:disabled){background:#c9a5ff;box-shadow:0 4px 22px rgba(160,89,255,.3)}
.btn.secondary{border-color:#9466c7;box-shadow:0 3px 16px rgba(133,58,218,.12)}
.btn.secondary:hover:not(:disabled){background:#30243f;border-color:var(--accent)}
.btn.danger{box-shadow:none}.btn.danger:hover:not(:disabled){background:#3b252b}
button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--accent)}
input:focus-visible,textarea:focus-visible,select:focus-visible{border-color:var(--accent)}
.day.planned:hover{background:#3b2b51}.day.done{border-color:#bb91eb}.day.done:hover{background:#473368}
.session-modal{box-shadow:0 20px 80px #0008,0 0 35px rgba(132,64,208,.12)}

/* Painel: turma e aluno selecionado à esquerda, configurações abaixo; no celular, configurações vão para o fim. */
.layout{grid-template-areas:"side main" "settings main";grid-template-rows:auto 1fr}.layout>.sidebar{grid-area:side}.layout>main{grid-area:main}.layout>.settings{grid-area:settings;align-self:start}
.layout>aside>.card:last-child{margin-bottom:0}.sidebar .student{margin:6px 0}.student:hover:not(.active){background:#221f2d;border-color:var(--line)}
.card details{margin-top:4px}.card details+details{margin-top:14px}details[open]>summary{margin-bottom:6px}summary{padding:4px 0}
.student-admin h2,.settings h2{font-size:19px;overflow-wrap:anywhere}.add-student{border-top:1px solid var(--line);margin-top:14px;padding-top:12px}
.setting-group{border-top:1px solid var(--line);margin-top:18px;padding-top:16px}.setting-group h3{font-size:14px;margin-bottom:8px}.setting-group p{margin:6px 0}
.status{display:inline-flex;align-items:center;gap:7px;font-size:13px}.status:before{content:'';width:8px;height:8px;border-radius:50%;background:currentColor}.status.on{color:#9fe0b4}.status.off{color:#ffc58a}
.danger-zone summary{color:#f0aaa0}.btn.danger{min-height:36px}.error.success{color:#9fe0b4}
.user-badge{max-width:240px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-row{flex-wrap:nowrap;min-width:0;gap:8px}.user-badge{min-width:0}header .brand{flex-shrink:0}
@media(max-width:850px){.layout{grid-template-areas:"side" "main" "settings";grid-template-rows:auto}.sidebar .student{display:block;width:100%}.hero{padding:26px 0 20px}.hero p{margin-bottom:0}.auth{align-content:start;min-height:0}.authintro{padding:36px 22px 8px}.authform{padding:12px 16px 36px}}
@media(max-width:480px){.shell{padding:16px}header{align-items:center;padding-bottom:16px}.user-badge{max-width:150px;padding:6px 10px}.hero h1{font-size:30px;letter-spacing:-1px}.authintro h1{font-size:32px;letter-spacing:-1px}.authintro .brand{margin-bottom:12px}.authintro .brand-logo{width:200px}.authintro p{margin:0}.authform .card{padding:20px}.card{padding:16px}.stats strong{font-size:22px}.stat span{font-size:11px;line-height:1.3;display:block}.calendar{gap:3px}.day{padding:5px;min-height:54px}.weekday{font-size:9px}#toast{left:16px;right:16px;bottom:16px;max-width:none}}
.student small{overflow-wrap:anywhere}.error{margin:8px 0}form .error+.btn,form .error~.btn{margin-top:4px}
@media(max-width:480px){.day .day-status{display:none}}
/* Barra lateral: lista de alunos com iniciais e menus em linhas */
.sidebar .student{display:flex;align-items:center;gap:12px;width:100%;margin:0;padding:10px 12px}
.student-list{display:grid;gap:6px;margin-top:12px}
.avatar{flex:none;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:#33264a;color:var(--accent);font-weight:700;font-size:13px;letter-spacing:.5px}
.student.active .avatar{background:var(--accent);color:#1a1424}
.who{min-width:0;display:grid;gap:2px}
.who strong{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.who small{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.truncate{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--muted);overflow-wrap:normal}
.truncate-inline{overflow-wrap:anywhere}
.profile{display:flex;align-items:center;gap:12px;margin:10px 0 14px}
.profile>div{min-width:0}
.profile h2{margin:0;font-size:18px}
.add-student{border-top:0;margin-top:10px;padding-top:0}
.add-student>summary{display:block;text-align:center;border:1px dashed var(--line);border-radius:10px;padding:10px;color:var(--accent);list-style:none}
.add-student>summary::-webkit-details-marker{display:none}
.add-student>summary:hover{border-color:var(--accent);background:#221f2d}
.add-student[open]>summary{margin-bottom:10px}
.menu{display:grid;gap:8px;margin-top:12px}
.card .menu>details{margin:0;border:1px solid var(--line);border-radius:10px;background:#1f1d29;overflow:hidden}
.menu>details>summary{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 14px;margin:0;list-style:none;font-weight:600;font-size:14px}
.menu>details>summary::-webkit-details-marker{display:none}
.menu>details>summary::after{content:'›';font-size:20px;line-height:1;color:var(--muted);transition:transform .15s}
.menu>details[open]>summary::after{transform:rotate(90deg)}
.menu>details>summary:hover{background:#262333}
.menu>details>summary .status{margin-left:auto;font-size:12px;font-weight:500}
.menu>details>:not(summary){margin-left:14px;margin-right:14px}
.menu>details>:last-child{margin-bottom:14px}
.menu>details[open]>summary{border-bottom:1px solid var(--line);margin-bottom:10px}
.menu details details{margin-top:10px}
.menu .btn{width:100%}
.menu>details.danger-zone{border-color:#4a3036}
.menu>details.danger-zone>summary{color:#f0aaa0}
.settings .setting-group{border-top:0;margin-top:20px;padding-top:0}
.settings .setting-group h3{font-size:12px;letter-spacing:1.5px;text-transform:uppercase;color:var(--muted);margin-bottom:0}
.menu details details>summary{font-size:13px;font-weight:500;color:var(--muted);padding:6px 0}
/* Topo: usuário + Meus alunos, Meu perfil, Sair */
.user-row{gap:8px;flex-wrap:wrap;justify-content:flex-end}
.user-chip{display:flex;align-items:center;gap:10px;min-width:0;max-width:240px;margin-right:6px}
.user-chip>span:last-child{min-width:0;display:grid;font-weight:600;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.user-chip small{color:var(--muted);font-weight:400;font-size:12px}
.btn.secondary.current{background:#30243f;border-color:var(--accent)}
img.avatar{object-fit:cover;background:#33264a}
.avatar.sm{width:34px;height:34px;font-size:12px}
.avatar.xl{width:96px;height:96px;font-size:30px}
/* Páginas Meu perfil e Meus alunos */
.page{display:grid;gap:18px;max-width:900px;margin:0 auto 32px}
.page .back{justify-self:start}
.photo-row{display:flex;align-items:center;gap:20px;margin:14px 0 22px;flex-wrap:wrap}
.photo-row>div{display:grid;gap:8px;justify-items:start}
.photo-row p{margin:0;max-width:360px}
.file-btn{position:relative;overflow:hidden;cursor:pointer}
.file-btn input{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%}
.file-btn:focus-within{outline:2px solid var(--accent)}
.page-head{align-items:flex-end;gap:14px;flex-wrap:wrap}
.page-head input[type=search]{max-width:280px;margin:0}
.student-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:18px 0}
.student-card{border:1px solid var(--line);border-radius:12px;padding:16px;background:#1f1d29;display:grid;gap:8px;align-content:start;min-width:0}
.student-card[hidden]{display:none}
.student-card-head{display:flex;align-items:center;gap:12px;min-width:0}
.student-card p{margin:0}
.month-progress{display:grid;gap:6px}
.month-progress progress{width:100%;height:8px;appearance:none;border:0;border-radius:99px;background:#2b2737;overflow:hidden}
.month-progress progress::-webkit-progress-bar{background:#2b2737;border-radius:99px}
.month-progress progress::-webkit-progress-value{background:var(--accent);border-radius:99px}
.month-progress progress::-moz-progress-bar{background:var(--accent)}
.student-card .btn{margin-top:4px}
.empty-search{color:var(--muted)}
@media(max-width:640px){.user-chip{flex-basis:100%;max-width:none;margin:0 0 4px}.user-row{justify-content:flex-start}.user-row .btn{flex:1;padding-left:10px;padding-right:10px}}
@media(max-width:640px){header{flex-wrap:wrap;gap:12px}header .user-row{width:100%;flex-wrap:nowrap}.user-chip{display:none}.user-row .btn{flex:1;white-space:nowrap;font-size:13px;min-height:40px}}
/* Início (home) e Professores */
.page.wide{max-width:1180px}
.muted{color:var(--muted)}
.welcome{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap;padding:6px 2px}
.welcome h1{font-size:clamp(30px,5vw,44px);margin:6px 0}
.welcome p{margin:0;color:var(--muted)}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.kpi{border:1px solid var(--line);border-radius:14px;padding:16px;background:var(--panel);display:grid;gap:6px;align-content:start}
.kpi span{font-size:12px;text-transform:uppercase;letter-spacing:1px;color:var(--muted)}
.kpi strong{font-size:32px;line-height:1;color:var(--text)}
.kpi strong em{font-style:normal;font-size:18px;color:var(--muted)}
.kpi small{color:var(--muted)}
.kpi.alert{border-color:#6a4b2a}
.kpi.alert strong{color:#ffc58a}
.kpi progress,.class-table progress{width:100%;height:6px;appearance:none;border:0;border-radius:99px;background:#2b2737;overflow:hidden}
.kpi progress::-webkit-progress-bar,.class-table progress::-webkit-progress-bar{background:#2b2737}
.kpi progress::-webkit-progress-value,.class-table progress::-webkit-progress-value{background:var(--accent);border-radius:99px}
.kpi progress::-moz-progress-bar,.class-table progress::-moz-progress-bar{background:var(--accent)}
.home-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.home-grid .card{margin:0;min-width:0}
.home-grid .span2{grid-column:span 2}
@media(max-width:980px){.home-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:640px){.home-grid{grid-template-columns:1fr}.home-grid .span2{grid-column:auto}}
.chart{width:100%;height:auto;margin-top:12px}
.chart .planned{fill:#3a3150}
.chart .done{fill:var(--accent)}
.chart text{fill:var(--muted);font-size:8px}
.legend{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);margin:6px 0 0}
.legend .dot{width:10px;height:10px;border-radius:3px;display:inline-block;margin-left:8px}
.legend .dot:first-child{margin-left:0}
.dot.done{background:var(--accent)}
.dot.planned{background:#3a3150}
.people,.feed,.ranking,.health{list-style:none;margin:12px 0 0;padding:0;display:grid;gap:10px}
.people li,.ranking li{display:flex;align-items:center;gap:10px;min-width:0}
.people .who,.ranking .who{flex:1}
.btn.small{padding:6px 10px;font-size:12px;min-height:0}
.tags{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.tag{display:inline-block;font-size:11px;font-weight:600;padding:3px 8px;border-radius:99px;background:#2b2737;color:var(--muted);white-space:nowrap}
.tag.warn{background:#3b2a1a;color:#ffc58a}
.tag.info{background:#2a2440;color:#cdb3ff}
.tag.ok{background:#1c3326;color:#9fe0b4}
.feed li{display:flex;gap:10px;align-items:flex-start;font-size:14px}
.feed small{color:var(--muted)}
.feed .when{display:block}
.feed-icon{flex:none;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:#2a2440;color:var(--accent);font-size:14px}
.feed-icon.practice{background:#1c3326;color:#9fe0b4}
.ranking{counter-reset:r}
.ranking li b{color:var(--accent);font-size:18px}
.health li{display:flex;justify-content:space-between;gap:10px;border-bottom:1px solid var(--line);padding-bottom:10px}
.health li:last-child{border-bottom:0}
.health span{color:var(--muted)}
.health .ok{color:#9fe0b4}
.health .bad{color:#ffc58a}
.teacher-card{padding:0;overflow:hidden}
.teacher-card[hidden]{display:none}
.teacher-card>summary{display:flex;align-items:center;gap:14px;padding:18px 20px;list-style:none;cursor:pointer;flex-wrap:wrap}
.teacher-card>summary::-webkit-details-marker{display:none}
.teacher-card>summary .who{flex:1;min-width:180px}
.teacher-card>summary .who strong{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.teacher-card[open]>summary{border-bottom:1px solid var(--line)}
.teacher-stats{display:flex;gap:16px;font-size:13px;color:var(--muted)}
.teacher-stats b{color:var(--text);font-size:16px}
.class-table{display:grid;padding:6px 12px 12px}
.class-table .tr{display:grid;grid-template-columns:minmax(0,2.2fr) 1.1fr 1fr minmax(0,2.2fr);gap:12px;align-items:center;padding:10px 8px;border-bottom:1px solid #2a2635}
.class-table .tr:last-child{border-bottom:0}
.class-table .th{font-size:11px;text-transform:uppercase;letter-spacing:1px;color:var(--muted)}
.cell-name{display:flex;align-items:center;gap:10px;min-width:0}
.class-table .month-progress{display:grid;gap:4px}
@media(max-width:760px){.class-table .th{display:none}.class-table .tr{grid-template-columns:1fr 1fr}.cell-name,.class-table .tags{grid-column:1/-1}}
@media(max-width:640px){.user-row{display:grid;grid-template-columns:repeat(3,1fr)}}
@media(max-width:640px){.kpis{grid-template-columns:1fr 1fr}.kpi strong{font-size:26px}.teacher-stats{width:100%;justify-content:space-between}}
.back-link{margin-bottom:12px}
.authintro .brand{display:flex;justify-content:center}
.authintro .brand-logo{margin:0 auto}