:root{
  --navy-900:#111d36; --navy-800:#16264a; --navy-700:#1c2b4a;
  --red-600:#e30613; --red-700:#c2050f;
  --gold-500:#f2b705;
  --cream-50:#faf7f0; --cream-100:#f2ece0;
  --ink-900:#161a22; --ink-700:#3c4457;
  --gray-500:#6c7080; --line:#e3dfd4;
  --white:#ffffff;
  --radius-md:12px; --radius-sm:8px;
  --font-display:'Oswald',sans-serif; --font-body:'Inter',sans-serif;
}
*{box-sizing:border-box;}
body{margin:0;font-family:var(--font-body);background:var(--cream-50);color:var(--ink-900);font-size:15px;line-height:1.5;}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--navy-900);margin:0 0 8px;letter-spacing:.01em;}
a{color:var(--red-600);text-decoration:none;}
a:hover{text-decoration:underline;}
.container{max-width:1080px;margin:0 auto;padding:0 20px;}
.container-narrow{max-width:640px;margin:0 auto;padding:0 20px;}

.topbar{background:var(--navy-900);color:#fff;padding:14px 0;}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-family:var(--font-display);font-size:18px;}
.brand:hover{text-decoration:none;}
.brand small{display:block;font-family:var(--font-body);font-size:11px;color:#b9c2d6;font-weight:400;}
.topnav{display:flex;gap:18px;align-items:center;flex-wrap:wrap;}
.topnav a{color:#d9deeb;font-size:14px;}
.topnav a.active{color:#fff;font-weight:600;}
.topnav .role-pill{background:var(--red-600);color:#fff;font-size:11px;padding:3px 9px;border-radius:999px;text-transform:uppercase;letter-spacing:.04em;}
.topnav form{margin:0;}
.btn-link{background:none;border:none;color:#d9deeb;font-size:14px;cursor:pointer;font-family:inherit;padding:0;}
.btn-link:hover{color:#fff;text-decoration:underline;}

.main{padding:34px 0 70px;}
.page-head{margin-bottom:26px;}
.page-head .eyebrow{display:inline-block;color:var(--red-600);font-family:var(--font-display);font-size:12px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:6px;}
.breadcrumb{font-size:13px;color:var(--gray-500);margin-bottom:10px;}
.breadcrumb a{color:var(--gray-500);}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:22px;margin-bottom:18px;}
.card-tight{padding:16px 18px;}
.grid{display:grid;gap:18px;}
.grid-2{grid-template-columns:1fr 1fr;}
.grid-3{grid-template-columns:repeat(3,1fr);}
@media (max-width:760px){.grid-2,.grid-3{grid-template-columns:1fr;}}

.btn{display:inline-block;font-family:var(--font-display);font-size:13.5px;letter-spacing:.03em;text-transform:uppercase;
  padding:11px 22px;border-radius:8px;border:1px solid transparent;cursor:pointer;text-align:center;}
.btn:hover{text-decoration:none;}
.btn-primary{background:var(--red-600);color:#fff;}
.btn-primary:hover{background:var(--red-700);color:#fff;}
.btn-dark{background:var(--navy-900);color:#fff;}
.btn-dark:hover{background:var(--navy-800);color:#fff;}
.btn-outline{background:#fff;color:var(--navy-900);border-color:var(--line);}
.btn-outline:hover{border-color:var(--navy-900);}
.btn-sm{padding:7px 14px;font-size:12px;}
.btn-danger{background:#fff;color:var(--red-600);border-color:var(--red-600);}
.btn[disabled],.btn.disabled{opacity:.5;cursor:not-allowed;pointer-events:none;}

label{display:block;font-size:13px;font-weight:600;margin-bottom:5px;color:var(--ink-700);}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=url],input[type=date],
textarea,select{
  width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font-family:var(--font-body);
  font-size:14.5px;background:#fff;color:var(--ink-900);
}
textarea{min-height:100px;resize:vertical;}
.field{margin-bottom:16px;}
.field-row{display:flex;gap:14px;flex-wrap:wrap;}
.field-row > .field{flex:1;min-width:160px;}
.help{font-size:12px;color:var(--gray-500);margin-top:4px;}
.checkbox-row{display:flex;align-items:center;gap:8px;font-weight:400;font-size:14px;color:var(--ink-900);}
.checkbox-row input{width:auto;}

table{width:100%;border-collapse:collapse;background:#fff;}
table th,table td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);font-size:14px;}
table th{font-family:var(--font-display);font-size:11.5px;text-transform:uppercase;letter-spacing:.05em;color:var(--gray-500);background:var(--cream-100);}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-md);}
.table-wrap table{border:none;}
.table-wrap .table-wrap{border:none;}

.pill{display:inline-block;padding:3px 11px;border-radius:999px;font-size:11.5px;font-family:var(--font-display);letter-spacing:.04em;text-transform:uppercase;}
.pill-admin{background:rgba(227,6,19,.12);color:var(--red-600);}
.pill-teacher{background:rgba(28,65,128,.12);color:var(--navy-700);}
.pill-student{background:rgba(242,183,5,.18);color:#8a6600;}
.pill-ok{background:rgba(34,139,60,.12);color:#1e7a34;}
.pill-warn{background:rgba(227,6,19,.12);color:var(--red-600);}
.pill-muted{background:#eee;color:var(--gray-500);}

.flash{padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:14px;}
.flash-success{background:#e7f6ea;color:#1e7a34;border:1px solid #bfe6c7;}
.flash-error{background:#fdeceb;color:var(--red-700);border:1px solid #f6c6c2;}
.flash-info{background:#eaf1fb;color:var(--navy-700);border:1px solid #c9dbf3;}

.progress-bar{background:var(--cream-100);border-radius:999px;height:10px;overflow:hidden;}
.progress-bar > span{display:block;height:100%;background:var(--red-600);border-radius:999px;}

.list-plain{list-style:none;margin:0;padding:0;}
.list-plain li{padding:10px 0;border-bottom:1px solid var(--line);}
.list-plain li:last-child{border-bottom:none;}

.material-row{display:flex;align-items:center;gap:12px;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:8px;background:#fff;}
.material-row .icon{font-size:20px;}
.material-row .grow{flex:1;}
.material-row .meta{font-size:12px;color:var(--gray-500);}
.material-row.viewed{border-color:#bfe6c7;background:#f7fdf8;}

.topic-block{border:1px solid var(--line);border-radius:var(--radius-md);padding:18px 20px;margin-bottom:16px;background:#fff;}
.topic-block h3{margin-bottom:12px;}

.quiz-question{border:1px solid var(--line);border-radius:var(--radius-md);padding:18px 20px;margin-bottom:16px;background:#fff;}
.quiz-question .qpoints{float:right;font-size:12px;color:var(--gray-500);}
.quiz-choice{display:flex;align-items:center;gap:10px;padding:8px 0;}
.quiz-choice input{width:auto;}

.empty-state{text-align:center;padding:50px 20px;color:var(--gray-500);}

.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(150deg,var(--navy-900),var(--navy-700));padding:20px;}
.login-card{background:#fff;border-radius:16px;padding:38px 34px;max-width:400px;width:100%;box-shadow:0 20px 60px rgba(0,0,0,.25);}
.login-card .brand-row{display:flex;align-items:center;gap:10px;margin-bottom:22px;}
.login-card .brand-row h1{font-size:19px;margin:0;}

.badge-dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px;}
.dot-green{background:#1e7a34;} .dot-red{background:var(--red-600);} .dot-gray{background:var(--gray-500);}

.course-cover{background:linear-gradient(135deg,var(--navy-900),var(--navy-700));border-radius:var(--radius-md) var(--radius-md) 0 0;height:80px;display:flex;align-items:center;padding:0 20px;}
.course-cover span{color:#fff;font-family:var(--font-display);font-size:13px;letter-spacing:.06em;text-transform:uppercase;opacity:.85;}
.course-card{border:1px solid var(--line);border-radius:var(--radius-md);background:#fff;overflow:hidden;display:flex;flex-direction:column;}
.course-card .body{padding:18px 20px;flex:1;display:flex;flex-direction:column;}
.course-card .body p{color:var(--ink-700);font-size:13.5px;flex:1;}

.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:20px;flex-wrap:wrap;}
.tabs a{padding:10px 16px;font-size:13.5px;color:var(--gray-500);border-bottom:2px solid transparent;}
.tabs a.active{color:var(--navy-900);border-color:var(--red-600);font-weight:600;}
.tabs a:hover{text-decoration:none;color:var(--navy-900);}

footer.app-footer{padding:22px 0;color:var(--gray-500);font-size:12.5px;border-top:1px solid var(--line);margin-top:40px;}