:root{--ink:#16324a;--muted:#52697b;--navy:#103d5a;--blue:#175ea0;--accent:#efb437;--line:#dce5ec;--bg:#f3f6f9;--white:#fff;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}body{margin:0;font-size:16px;line-height:1.55}button,input,textarea,select{font:inherit}button,a,input,textarea,select{ -webkit-tap-highlight-color:transparent}button,.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--blue);color:white;border:1px solid transparent;border-radius:9px;padding:11px 17px;font-weight:600;font-size:.9rem;cursor:pointer;text-decoration:none}button:hover,.button:hover{filter:brightness(.95)}button:disabled{opacity:.55;cursor:wait}a{color:var(--blue);text-underline-offset:3px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--accent);outline-offset:3px}h1,h2,h3,p{margin-top:0}h1{font-size:2rem;line-height:1.22;letter-spacing:-.035em;margin-bottom:10px}h2{font-size:1.22rem;line-height:1.35;margin-bottom:18px}h3{font-size:1.06rem;line-height:1.4;margin-bottom:9px}p{margin-bottom:16px}small{font-size:.85rem}svg{display:inline-block;flex-shrink:0;vertical-align:middle}.app-shell{display:flex;min-height:100vh}.sidebar{width:252px;position:fixed;inset:0 auto 0 0;background:var(--navy);color:#fff;padding:33px 18px;display:flex;flex-direction:column;z-index:30}.brand{display:flex;gap:12px;align-items:center;text-decoration:none;color:white;margin:0 9px 46px;font-size:.92rem;font-weight:700;letter-spacing:.05em}.brand small{display:block;font-size:.78rem;font-weight:400;letter-spacing:.02em;color:#b9d3e5;margin-top:3px}.brand-mark{width:40px;height:40px;background:var(--accent);color:var(--navy);font-size:1.4rem;border-radius:11px;display:flex;align-items:center;justify-content:center;font-weight:800;flex-shrink:0}.nav-label{font-size:.73rem;color:#adc3d3;letter-spacing:.1em;padding:0 14px 17px}.nav-item{background:transparent;color:#d6e2ed;border:0;justify-content:flex-start;width:100%;padding:14px 13px;margin:0 0 7px;font-size:.87rem;text-align:left;gap:11px}.nav-item.active{background:#245570;color:#fff;box-shadow:inset 3px 0 var(--accent)}.nav-count{font-size:.75rem;background:#fff;color:var(--navy);border-radius:20px;padding:0 7px;margin-left:auto}.sidebar-bottom{margin-top:auto;padding:38px 10px 0}.private-note{display:flex;gap:11px;color:#e0ebf3;font-size:.82rem;margin-bottom:23px}.private-note small{display:block;font-size:.75rem;color:#aec8db;margin-top:6px}.sidebar-bottom>a{display:block;color:#c5d9e8;font-size:.84rem;margin-bottom:11px}.workspace{margin-left:252px;width:calc(100% - 252px)}.topbar{height:87px;background:#fff;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;padding:0 40px;gap:18px}.topbar-title{font-size:.84rem;color:var(--muted);display:flex;gap:10px;align-items:center}.topbar-title b{font-weight:500;color:var(--ink)}.account{display:flex;align-items:center;gap:12px}.avatar{height:36px;width:36px;border-radius:50%;background:#e3edf5;display:flex;align-items:center;justify-content:center;font-weight:700}.account-name{font-size:.85rem;font-weight:600}.account-name small{display:block;font-size:.73rem;font-weight:400;color:var(--muted)}.language{padding:5px 7px;border:1px solid var(--line);background:white;color:var(--ink);font-size:.8rem}.ghost{background:transparent;color:var(--muted);padding:6px;border:0;display:inline-flex;align-items:center;justify-content:center;border-radius:6px}.mobile-menu,.mobile-close{display:none}main{max-width:1440px;margin:auto;padding:37px 40px 0}.page-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:27px}.eyebrow{display:block;letter-spacing:.1em;font-size:.7rem;font-weight:700;color:var(--blue);margin-bottom:12px}.page-heading p{color:var(--muted);margin:0;font-size:.95rem}.teacher-badge{display:inline-flex;align-items:center;gap:7px;font-size:.78rem;border:1px solid #cfdeea;background:#eaf1f7;padding:7px 11px;white-space:nowrap;border-radius:30px}.overview{display:grid;grid-template-columns:1fr 1fr 1fr 1.85fr;gap:13px;margin-bottom:35px}.stat{padding:20px;background:white;border:1px solid var(--line);border-radius:12px;display:flex;gap:13px;align-items:center}.stat>svg{color:var(--blue);width:23px}.stat strong{display:block;font-size:1.7rem;line-height:1.2;letter-spacing:-.03em}.stat span{color:var(--muted);font-size:.75rem}.class-card{background:var(--navy);color:white;border-radius:12px;padding:20px;display:flex;align-items:center;gap:12px}.class-card small{display:block;color:#c5d8e6;font-size:.75rem;margin-top:5px}.class-card strong{font-size:.9rem}.class-card>a{margin-left:auto}.light{background:#fff;color:var(--navy);padding:7px 10px}.section-row{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:18px}.section-row h2,.section-row h3{margin:0}.section-row select{width:auto;max-width:250px;font-size:.85rem}.learning-layout{display:grid;grid-template-columns:minmax(260px,.8fr) minmax(360px,1.35fr);gap:23px;align-items:start}.lesson-card{width:100%;display:flex;text-align:left;justify-content:flex-start;align-items:flex-start;gap:14px;padding:22px 18px;background:white;color:var(--ink);border:1px solid var(--line);border-radius:12px;margin-bottom:13px;font-weight:400}.lesson-card.chosen{border-color:var(--blue);box-shadow:0 0 0 1px var(--blue);background:#f9fcff}.lesson-number{width:34px;height:34px;border-radius:9px;background:#e9f0f7;color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:.84rem;font-weight:600;flex-shrink:0}.chosen .lesson-number{background:var(--blue);color:white}.course-label{display:block;font-size:.7rem;text-transform:uppercase;letter-spacing:.075em;font-weight:700;color:var(--blue);margin-bottom:8px}.lesson-card h3{font-size:1.02rem;margin-bottom:7px}.lesson-card p{font-size:.8rem;color:var(--muted);margin-bottom:14px}.lesson-card small{display:flex;align-items:center;flex-wrap:wrap;gap:6px;color:var(--muted);font-size:.75rem}.submitted{color:#237054;display:inline-flex;gap:4px;margin-left:8px;align-items:center}.lesson-detail{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}.detail-head{padding:25px 29px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}.detail-head h2{font-size:1.55rem;letter-spacing:-.02em;margin:0 0 7px}.detail-head p{font-size:.86rem;color:var(--muted);margin:0}.download{background:#eef3f7;padding:10px}.study-content{padding:25px 29px}.study-content section{margin-bottom:23px}.study-content section:last-child{margin:0}.study-content h3{font-size:.74rem;letter-spacing:.075em;color:var(--blue);margin-bottom:9px}.study-content p{font-size:.96rem;line-height:1.85;white-space:pre-wrap;margin:0}.homework-box{background:#eaf2fa;margin:0 20px 20px;padding:24px;border-radius:11px}.homework-box p{font-size:.9rem;line-height:1.7}.homework-box .eyebrow{font-size:.67rem}.homework-box h3{font-size:1.15rem}.resources{padding:0 29px 22px}.file-link{display:flex;align-items:center;gap:10px;padding:12px;border:1px solid var(--line);border-radius:8px;font-size:.88rem;margin:8px 0;text-decoration:none;overflow-wrap:anywhere}.file-link>svg:last-child{margin-left:auto}.panel{background:white;border:1px solid var(--line);border-radius:13px;padding:26px;margin-bottom:20px}.two-columns{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:start}.manage-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:start}.muted{color:var(--muted);font-size:.88rem}.panel form{margin-top:16px}form label{display:block;font-size:.87rem;font-weight:600;margin-bottom:17px}input,textarea,select{display:block;width:100%;border:1px solid #cbd7e1;border-radius:8px;background:#fff;color:var(--ink);padding:10px 11px;margin-top:7px;font-size:.95rem;min-height:43px}textarea{min-height:90px;resize:vertical;line-height:1.6;font-weight:400}.large-textarea{min-height:165px}input[type=file]{font-size:.8rem;font-weight:400}input::file-selector-button{border:0;background:#e9f0f6;color:var(--navy);border-radius:5px;padding:6px 9px;margin-right:9px;cursor:pointer}.secondary{background:#edf3f8;color:var(--navy);margin-top:14px;font-size:.82rem}.task-mini{background:#f0f5fa;border-left:3px solid var(--accent);padding:16px;margin:18px 0;font-size:.88rem;line-height:1.65}.empty{background:white;border:1px dashed #becdd9;border-radius:13px;text-align:center;padding:38px 25px;color:var(--muted)}.empty>svg{width:30px;height:30px;margin-bottom:17px;color:#8099ab}.empty h3{color:var(--ink)}.empty p{font-size:.88rem;margin:0}.submission .section-row small{font-size:.72rem;color:var(--muted)}.submission h3{margin-top:20px}.answer{white-space:pre-wrap;font-size:.93rem}.pill{font-size:.7rem;background:#fff4dc;color:#755617;padding:5px 9px;border-radius:20px;display:inline-block;font-weight:600}.pill.reviewed{background:#e4f3ee;color:#276749}.teacher-feedback{background:#edf6f1;border-radius:8px;padding:16px;margin:18px 0;font-size:.88rem}.teacher-feedback p{white-space:pre-wrap;margin:8px 0 0}.notice{background:#e8f1fa;border:1px solid #c1d8ed;padding:13px 16px;border-radius:9px;margin-bottom:24px;display:flex;justify-content:space-between;align-items:center;gap:16px;font-size:.9rem}.notice button{background:transparent;color:var(--ink);padding:3px}.video-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.video-card{padding:0 0 22px;overflow:hidden}.video-card .course-label,.video-card h3,.video-card p,.video-card>a{margin-left:24px;margin-right:24px}.video-card .course-label{margin-top:22px}.video-card p{font-size:.9rem;color:var(--muted)}.video-card>a{font-size:.86rem}.video-screen{background:#173e59;aspect-ratio:16/9;display:flex;align-items:center;justify-content:center}.video-screen button{height:100%;width:100%;background:#173e59;flex-direction:column;gap:17px;border-radius:0;font-size:.88rem;font-weight:400}.play-icon{border:1px solid #6d8da4;border-radius:50%;width:64px;height:64px;display:flex;align-items:center;justify-content:center;color:var(--accent)}.video-screen iframe{width:100%;height:100%;border:0}.video-admin{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding-top:12px;margin-top:16px;font-size:.83rem}details{font-size:.87rem}summary{cursor:pointer;color:var(--blue);font-weight:600}footer{font-size:.76rem;color:var(--muted);padding:31px 0;margin-top:23px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px}.loading{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;padding:30px;text-align:center}.loading p{max-width:570px}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(min-width:1500px){main{padding-top:44px}}@media(max-width:1200px){.sidebar{width:223px}.workspace{margin-left:223px;width:calc(100% - 223px)}main{padding:30px 25px 0}.topbar{padding:0 25px}.overview{grid-template-columns:repeat(3,1fr)}.class-card{grid-column:1/-1}.learning-layout{grid-template-columns:minmax(230px,.8fr) minmax(310px,1.2fr)}.teacher-badge{display:none}}@media(max-width:850px){.sidebar{transform:translateX(-100%);transition:transform .2s}.sidebar.visible{transform:translateX(0)}.workspace{margin-left:0;width:100%}.mobile-menu,.mobile-close{display:inline-flex}.mobile-close{position:absolute;right:12px;top:12px;color:#fff}.scrim{position:fixed;inset:0;background:#1238;z-index:25}.topbar{height:74px}.topbar-title>span{display:none}.two-columns,.manage-grid{grid-template-columns:1fr}.video-grid{grid-template-columns:1fr}.account-name small{display:none}}@media(max-width:600px){main{padding:26px 17px 0}.topbar{padding:0 17px}.account{gap:8px}.account-name{max-width:120px;font-size:.8rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.page-heading{margin-bottom:22px}h1{font-size:1.7rem}.eyebrow{font-size:.65rem}.overview{gap:8px;margin-bottom:27px}.stat{padding:13px 9px;gap:7px}.stat>svg{width:16px}.stat strong{font-size:1.35rem}.stat span{font-size:.65rem}.learning-layout{grid-template-columns:1fr}.lesson-list{display:grid;grid-template-columns:1fr}.lesson-card{padding:17px}.detail-head,.study-content{padding:23px}.section-row{flex-wrap:wrap}.section-row select{max-width:100%;width:100%}.panel{padding:22px}.class-card{padding:17px}.homework-box{margin:0 14px 14px;padding:20px}footer{flex-direction:column;gap:6px}.notice{overflow-wrap:anywhere}}@media(prefers-reduced-motion:reduce){.spin{animation:none}.sidebar{transition:none}}

.auth-page{min-height:100dvh;display:grid;place-items:center;padding:24px;background:#eff5f1}.auth-card{max-width:480px;width:100%;background:white;border:1px solid #dbe5dd;border-radius:24px;padding:clamp(24px,6vw,42px);box-shadow:0 16px 60px #18463112}.auth-card .brand{margin-bottom:36px}.auth-card h1{font-size:32px;margin:12px 0}.auth-card p{line-height:1.65}.auth-card form{margin:24px 0}.auth-card form button{width:100%;margin-top:10px}.auth-card label{margin-top:16px}.auth-error{background:#fff1ee;color:#922d25;border-radius:12px;padding:12px}.auth-private{display:block;line-height:1.6;margin-top:24px;color:#5b7064}.password-control{position:fixed;right:16px;bottom:12px;z-index:3;font-size:12px;box-shadow:0 4px 20px #1232}.file-link{width:100%;justify-content:flex-start;text-align:left}@media(max-width:520px){.password-control{position:static;margin:8px 16px}.auth-page{padding:16px}.auth-card h1{font-size:28px}}

.auth-card .brand{color:var(--navy)}.auth-card .brand small{color:var(--muted)}


/* Bilingual student calendar */
.calendar-layout{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(300px,.85fr);gap:22px;align-items:start}
.calendar-panel,.calendar-events{min-width:0}
.calendar-toolbar{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap}
.calendar-toolbar h2{margin-bottom:4px}
.calendar-zone{min-width:220px;font-size:.78rem;color:var(--muted)}
.calendar-zone select{display:block;width:100%;margin-top:5px}
.calendar-month{display:flex;align-items:center;justify-content:center;gap:10px;margin:22px 0 12px}
.calendar-month h3{margin:0 auto;text-align:center;text-transform:capitalize}
.calendar-month .secondary{padding:7px 10px;min-height:36px}
.calendar-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:5px}
.calendar-weekday{text-align:center;font-size:.75rem;font-weight:700;color:var(--muted);padding:7px 0}
.calendar-empty{min-height:62px}
.calendar-day{display:flex;flex-direction:column;justify-content:flex-start;align-items:flex-start;gap:4px;min-height:66px;padding:8px 7px;background:#f8fafc;border:1px solid var(--line);color:var(--ink);border-radius:9px;font-weight:600;font-size:.85rem}
.calendar-day small{font-size:.62rem;font-weight:500;line-height:1.15;color:var(--blue)}
.calendar-day.selected{background:#e8f2fc;border-color:var(--blue);box-shadow:inset 0 0 0 1px var(--blue)}
.calendar-day.today span{border-bottom:2px solid var(--accent)}
.calendar-privacy{display:flex;align-items:flex-start;gap:8px;margin:18px 0 0;font-size:.82rem}
.calendar-events .section-row{align-items:flex-start;gap:12px}
.calendar-events .section-row h2{font-size:1rem;margin:0}
.calendar-event{display:grid;grid-template-columns:minmax(115px,.7fr) minmax(0,1fr) auto;gap:12px;align-items:start;padding:17px 0;border-bottom:1px solid var(--line)}
.calendar-event:last-child{border-bottom:0}
.calendar-event-time{display:flex;flex-direction:column;gap:4px;font-size:.8rem;color:var(--muted)}
.calendar-event-time strong{color:var(--ink);font-size:.9rem}
.calendar-event-body h3{margin:0 0 4px;overflow-wrap:anywhere}
.calendar-event-body small{display:block;color:var(--blue);margin-bottom:5px;overflow-wrap:anywhere}
.calendar-event-body p{font-size:.88rem;white-space:pre-wrap;overflow-wrap:anywhere;margin:7px 0 0}
.calendar-event-actions{display:flex;gap:5px}
.calendar-event-actions .secondary{padding:7px}
.empty-state{padding:30px 8px;text-align:center;color:var(--muted);font-size:.9rem}
.calendar-modal-backdrop{position:fixed;inset:0;background:rgba(9,28,42,.56);z-index:80;display:flex;align-items:center;justify-content:center;padding:18px;overflow:auto}
.calendar-form{width:min(560px,100%);max-height:calc(100vh - 36px);overflow:auto;box-shadow:0 20px 60px rgba(0,0,0,.22)}
.calendar-form form{display:grid;gap:13px}
.calendar-form label{display:grid;gap:5px;font-size:.86rem;font-weight:600}
.calendar-form input,.calendar-form select,.calendar-form textarea,.calendar-zone select{width:100%;padding:10px 11px;border:1px solid var(--line);border-radius:8px;background:white;color:var(--ink)}
.calendar-form textarea{resize:vertical}
.calendar-form .muted{font-size:.82rem;margin:0}
.calendar-form-actions{display:flex;gap:10px;flex-wrap:wrap}
@media(max-width:1050px){.calendar-layout{grid-template-columns:1fr}.calendar-events{min-width:0}}
@media(max-width:520px){.calendar-day{min-height:53px;padding:6px 4px;font-size:.78rem}.calendar-day small{font-size:.56rem}.calendar-empty{min-height:53px}.calendar-event{grid-template-columns:1fr auto}.calendar-event-time{grid-column:1/-1;flex-direction:row;flex-wrap:wrap;align-items:center}.calendar-event-body{grid-column:1}.calendar-event-actions{grid-column:2;grid-row:2}.calendar-month{gap:5px}.calendar-month .secondary{padding:7px}}