:root{--navy:#102f4f;--blue:#087fc3;--blue2:#0b9bd2;--sky:#eaf7fd;--green:#159b68;--red:#c43c46;--ink:#183244;--muted:#67808f;--line:#d8e7ee;--bg:#f5f9fb;--white:#fff;--shadow:0 12px 35px rgba(22,72,98,.09)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Tahoma,Arial,sans-serif;line-height:1.7;font-size:16px}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.wrap{width:min(1120px,calc(100% - 28px));margin:auto}
.top{position:sticky;top:0;z-index:30;background:linear-gradient(135deg,#086f9d,#0b93c4);color:#fff;box-shadow:0 5px 20px #0a4b6e22}.nav{min-height:70px;display:flex;align-items:center;gap:9px}.logo{font-weight:900;font-size:1.22rem;margin-left:auto}.logo span{color:#b9efff}.nav a{padding:8px 11px;border-radius:10px}.nav a:hover{background:#ffffff17}.nav .account{background:#fff;color:#08769f;font-weight:800}
.hero{margin:26px auto;background:linear-gradient(135deg,#fff 58%,#e3f6ff);border:1px solid var(--line);border-radius:27px;padding:34px;display:grid;grid-template-columns:1.3fr .7fr;gap:25px;box-shadow:var(--shadow)}.eyebrow,.pill{display:inline-flex;align-items:center;background:#e7f6fd;color:#067ba9;border-radius:999px;padding:4px 11px;font-size:.86rem;font-weight:800}.hero h1{color:var(--navy);font-size:clamp(2rem,4.5vw,3.45rem);line-height:1.25;margin:12px 0}.hero p{color:var(--muted);font-size:1.05rem}.hero-card{border-radius:21px;background:#103d61;color:#fff;padding:22px}.hero-card strong{font-size:2rem;display:block}.progress{height:10px;border-radius:20px;background:#dce9ef;overflow:hidden}.progress i{height:100%;background:linear-gradient(90deg,#0b91cb,#20c588);display:block}.hero-card .progress{background:#ffffff2b}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}
.btn{border:0;border-radius:12px;background:linear-gradient(135deg,var(--blue),var(--blue2));color:#fff;padding:11px 18px;font-weight:800;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:7px}.btn:hover{filter:brightness(.96);transform:translateY(-1px)}.btn.alt{background:#e7f3f8;color:#0b729d}.btn.danger{background:#fff0f1;color:var(--red)}.btn.small{padding:7px 12px;font-size:.85rem}
.section{margin:30px auto}.section-head{display:flex;justify-content:space-between;align-items:end;gap:12px;margin-bottom:14px}.section-head h2{margin:0;color:var(--navy)}.section-head p{margin:2px 0 0;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.card,.panel{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:0 7px 20px #24566e0c}.card:hover{border-color:#8dcbe7}.card h3{margin:12px 0 4px}.card p{color:var(--muted);margin:0 0 14px}.icon{width:49px;height:49px;border-radius:15px;background:var(--sky);color:#087fac;display:grid;place-items:center;font-size:1.45rem}.meta{display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:.86rem}.locked{opacity:.72}
.page{padding:28px 0 55px}.two{display:grid;grid-template-columns:1fr 1fr;gap:17px}.sidebar-layout{display:grid;grid-template-columns:260px 1fr;gap:18px}.side{align-self:start;position:sticky;top:91px}.side a{display:block;padding:10px 12px;border-radius:10px}.side a.active,.side a:hover{background:var(--sky);color:#08799f;font-weight:800}
.form{max-width:580px;margin:28px auto}.form h1{text-align:center;color:var(--navy)}label{display:block;font-weight:700;margin:11px 0 5px}input,select,textarea{width:100%;border:1px solid #cddfe7;border-radius:11px;background:#fff;padding:11px 12px;color:var(--ink)}input:focus,select:focus,textarea:focus{outline:3px solid #0c8fc522;border-color:#0b8dc2}.help{font-size:.84rem;color:var(--muted)}.alert{border-radius:12px;padding:11px 14px;margin:13px 0;background:#e8f9f1;color:#08784c}.alert.err{background:#fff0f1;color:#a72c39}
.lesson-shell{max-width:860px;margin:28px auto}.lesson-body{font-size:1.05rem}.lesson-body h2{color:var(--navy)}.lesson-body p{background:#f7fbfd;border-radius:11px;padding:10px 12px}.word-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}.word-grid b{background:#edf8fd;padding:12px;border-radius:10px}.audio{width:100%;margin:12px 0}.complete{margin-top:22px;text-align:center}.chat-row{display:flex;gap:8px}.feedback{display:none;border-radius:10px;padding:10px;margin-top:8px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.stat{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px}.stat strong{display:block;font-size:1.75rem;color:#087ca7}.table-wrap{overflow:auto}.table{width:100%;border-collapse:collapse;min-width:650px}.table th,.table td{text-align:right;border-bottom:1px solid var(--line);padding:11px}.table th{color:#53707e;font-size:.87rem}
.circle-link{direction:ltr;text-align:left;background:#edf7fb;border:1px dashed #77bcd7;border-radius:10px;padding:10px;overflow-wrap:anywhere}.student{display:grid;grid-template-columns:44px 1fr 130px;gap:11px;align-items:center;border-bottom:1px solid var(--line);padding:10px 0}.avatar{width:42px;height:42px;border-radius:13px;background:var(--sky);display:grid;place-items:center;font-weight:900;color:#087ea9}
.circle-card{border:1px solid var(--line);background:#f9fcfd;border-radius:14px;padding:14px;margin:10px 0}.circle-card .actions{margin-top:11px}.invite-box{border:2px solid #77c7e6;background:linear-gradient(135deg,#fff,#f0fbff)}.invite-box .circle-link{font-size:1rem;padding:14px;background:#fff}
.cert{max-width:820px;margin:30px auto;background:#fff;border:9px double #1689b5;border-radius:8px;padding:50px;text-align:center}.cert h1{color:#0a6f99}.cert .name{font-size:2rem;font-weight:900;color:var(--navy)}.footer{padding:28px;text-align:center;color:var(--muted)}.share{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
@media(max-width:780px){.hero,.two,.sidebar-layout{grid-template-columns:1fr}.hero{padding:22px}.grid{grid-template-columns:1fr}.stats{grid-template-columns:1fr 1fr}.side{position:static}.nav a.hide-mobile{display:none}.section-head{align-items:start;flex-direction:column}.hero-card{order:-1}.student{grid-template-columns:42px 1fr}.student>.progress{grid-column:1/-1}.chat-row{flex-direction:column}.word-grid{grid-template-columns:1fr}.cert{padding:27px 15px}}
@media print{.top,.footer,.actions,.btn{display:none!important}.cert{margin:0;border-color:#000}}