/* app.css — the LMS dashboard (student / instructor / admin). */
*{box-sizing:border-box}
:root{
  --primary:#12284b; --accent:#c8a04a; --ink:#1b2540; --muted:#68758c;
  --bg:#f4f6fb; --card:#ffffff; --line:#e6eaf2; --primary-2:#274a86;
  --good:#1c8f5a; --good-bg:#e7f6ee; --warn:#b7791f; --warn-bg:#fdf3e0;
  --bad:#c0392b; --bad-bg:#fdecec; --info:#2f5fb0; --info-bg:#eaf1fb;
}
body{margin:0;font-family:"Inter",system-ui,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink)}
a{color:var(--primary);text-decoration:none}
img{max-width:100%}

/* Layout */
.shell{display:flex;min-height:100vh}
.sidebar{width:250px;background:var(--primary);color:#dfe6f2;flex-shrink:0;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
.side-brand{display:flex;align-items:center;gap:12px;padding:20px 20px;border-bottom:1px solid rgba(255,255,255,.1)}
.side-brand img{width:38px;height:38px;object-fit:contain;background:#fff;border-radius:8px;padding:3px}
.side-brand .bname{font-family:"Fraunces",Georgia,serif;font-size:17px;color:#fff;font-weight:600}
.side-brand .brole{font-size:10px;letter-spacing:2px;text-transform:uppercase;color:var(--accent);font-weight:700}
.nav-group{padding:14px 12px;flex:1;overflow-y:auto}
.nav-group .lbl{font-size:11px;letter-spacing:2px;text-transform:uppercase;color:#7f92b4;padding:8px 12px}
.nav-link{display:flex;align-items:center;gap:11px;padding:11px 14px;border-radius:10px;color:#c7d2e6;font-size:14.5px;font-weight:500;margin:2px 0}
.nav-link:hover{background:rgba(255,255,255,.07);color:#fff}
.nav-link.active{background:var(--accent);color:#20160a;font-weight:600}
.nav-link .ic{width:18px;text-align:center}
.side-user{padding:14px 16px;border-top:1px solid rgba(255,255,255,.1);display:flex;align-items:center;gap:11px}
.avatar{width:36px;height:36px;border-radius:50%;background:var(--accent);color:#20160a;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px}
.side-user .nm{font-size:13.5px;color:#fff;font-weight:600;line-height:1.2}
.side-user .rl{font-size:11px;color:#9fb0cb}

.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{height:64px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 26px;position:sticky;top:0;z-index:20}
.topbar .pg-title{font-weight:600;font-size:16px}
.topbar .tb-right{display:flex;align-items:center;gap:16px}
.topbar .tb-right a{color:var(--muted);font-size:14px;font-weight:500}
.topbar .tb-right a:hover{color:var(--primary)}
.content{padding:26px;max-width:1180px;width:100%;margin:0 auto}
.mobile-bar{display:none}

/* Welcome banner */
.banner{background:linear-gradient(120deg,var(--primary),var(--primary-2));border-radius:18px;color:#fff;padding:26px 28px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;margin-bottom:22px}
.banner h2{margin:0 0 4px;font-size:24px;font-family:"Fraunces",Georgia,serif;color:#fff}
.banner p{margin:0;color:#d7e0f0}
.banner .chips{margin-top:14px;display:flex;gap:10px;flex-wrap:wrap}
.chip{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.2);padding:6px 12px;border-radius:999px;font-size:13px;font-weight:500}
.banner-stats{display:flex;gap:14px}
.bstat{background:rgba(255,255,255,.12);border-radius:12px;padding:14px 18px;text-align:center;min-width:78px}
.bstat b{display:block;font-size:26px;font-family:"Fraunces",Georgia,serif}
.bstat span{font-size:12px;color:#cdd8ea}

/* Stat tiles */
.tiles{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));margin-bottom:22px}
.tile{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px}
.tile .ic{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:19px;margin-bottom:12px}
.tile b{font-size:28px;font-family:"Fraunces",Georgia,serif;display:block;line-height:1}
.tile .t{font-weight:600;margin-top:4px}
.tile .s{color:var(--muted);font-size:13px}
.ic-blue{background:var(--info-bg);color:var(--info)} .ic-green{background:var(--good-bg);color:var(--good)}
.ic-gold{background:#f7efd8;color:var(--warn)} .ic-purple{background:#efeafb;color:#6b4fbb}
.ic-red{background:var(--bad-bg);color:var(--bad)}

/* Cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px 22px;margin-bottom:20px}
.card h3{margin:0 0 4px;font-size:17px}
.card .sub{color:var(--muted);font-size:13.5px;margin:0 0 16px}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}
.card-head h3{margin:0}
.two-col{display:grid;grid-template-columns:1fr 340px;gap:20px;align-items:start}

/* Course cards (dashboard) */
.course-list{display:grid;gap:18px;grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
.ccard{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.ccard .head{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;padding:18px 20px}
.ccard .head .code{font-size:11px;letter-spacing:2px;color:var(--accent);font-weight:700;text-transform:uppercase}
.ccard .head h4{margin:5px 0 0;font-size:18px;color:#fff}
.ccard .body{padding:16px 20px}
.metric-row{display:flex;gap:10px;margin-bottom:14px}
.metric{flex:1;background:var(--bg);border-radius:10px;padding:10px 12px}
.metric b{display:block;font-size:18px}
.metric span{font-size:12px;color:var(--muted)}
.bar{height:8px;background:var(--line);border-radius:99px;overflow:hidden;margin:6px 0 4px}
.bar>i{display:block;height:100%;background:var(--accent)}

/* Lecture block */
.lecture{border:1px solid var(--line);border-radius:14px;margin-bottom:16px;overflow:hidden}
.lecture .lh{background:var(--bg);padding:14px 18px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line)}
.lecture .lh .no{width:30px;height:30px;border-radius:8px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
.lecture .lh h4{margin:0;font-size:16px}
.lecture .lb{padding:16px 18px}
.lecture .desc{color:var(--muted);margin:0 0 14px}
.res-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:6px}
.res{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:10px;font-size:13.5px;font-weight:600;border:1px solid var(--line)}
.res-video{background:#fdecec;color:var(--bad);border-color:#f6c9c9}
.res-time{background:var(--info-bg);color:var(--info);border-color:#c9dbf5}
.res-wa{background:#e4f7ec;color:#128c4b;border-color:#b8e6cc}
.res-zoom{background:#eae7fb;color:#5b46b0;border-color:#cdc6f0}
.res-dl{background:#f7efd8;color:var(--warn);border-color:#ecd9a6}
.res-read{background:#eef1f6;color:var(--primary);border-color:#d7deeb}

/* Video embed */
.embed{position:relative;padding-top:56.25%;border-radius:12px;overflow:hidden;background:#000;margin:6px 0 14px}
.embed iframe,.embed video{position:absolute;inset:0;width:100%;height:100%;border:0}

/* Tables */
table.tbl{width:100%;border-collapse:collapse}
table.tbl th,table.tbl td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);font-size:14px}
table.tbl th{color:var(--muted);font-weight:600;font-size:12.5px;text-transform:uppercase;letter-spacing:.5px}
table.tbl tr:hover td{background:#fafbfe}

/* Badges */
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600}
.b-ok{background:var(--good-bg);color:var(--good)} .b-warn{background:var(--warn-bg);color:var(--warn)}
.b-bad{background:var(--bad-bg);color:var(--bad)} .b-info{background:var(--info-bg);color:var(--info)}
.b-grey{background:#eef1f6;color:var(--muted)}

/* Forms */
.form-grid{display:grid;gap:16px;grid-template-columns:1fr 1fr}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
label{font-weight:600;font-size:13.5px}
input[type=text],input[type=password],input[type=email],input[type=tel],input[type=url],
input[type=datetime-local],input[type=number],input[type=date],select,textarea,input[type=file]{
  padding:11px 13px;border:1px solid var(--line);border-radius:10px;font-size:14.5px;font-family:inherit;background:#fff;width:100%}
textarea{min-height:96px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.hint{color:var(--muted);font-size:12.5px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:10px;font-weight:600;font-size:14.5px;cursor:pointer;border:0}
.btn-primary{background:var(--primary);color:#fff} .btn-primary:hover{background:var(--primary-2)}
.btn-gold{background:var(--accent);color:#20160a} .btn-gold:hover{filter:brightness(1.05)}
.btn-ghost{background:#fff;border:1px solid var(--line);color:var(--ink)} .btn-ghost:hover{background:var(--bg)}
.btn-danger{background:var(--bad-bg);color:var(--bad);border:1px solid #f3b4b4} .btn-danger:hover{background:#fbdcdc}
.btn-sm{padding:7px 13px;font-size:13px}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}

/* Flash */
.flash{padding:12px 16px;border-radius:10px;margin-bottom:18px;font-weight:500}
.flash-ok{background:var(--good-bg);color:var(--good);border:1px solid #b8e6cc}
.flash-err{background:var(--bad-bg);color:var(--bad);border:1px solid #f3b4b4}

/* List items */
.li-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}
.li-row:last-child{border-bottom:0}
.li-row .li-title{font-weight:600}
.li-row .li-sub{color:var(--muted);font-size:13px}
.empty{text-align:center;color:var(--muted);padding:34px 10px}
.empty .big{font-size:34px;margin-bottom:6px}

/* Tabs */
.tabs{display:flex;gap:8px;border-bottom:1px solid var(--line);margin-bottom:20px;flex-wrap:wrap}
.tab{padding:10px 16px;border-radius:10px 10px 0 0;font-weight:600;color:var(--muted);border-bottom:2px solid transparent}
.tab.active{color:var(--primary);border-bottom-color:var(--accent)}

/* Login */
.login-wrap{min-height:100vh;display:grid;grid-template-columns:1fr 1fr}
.login-art{background:linear-gradient(140deg,var(--primary),var(--primary-2));color:#fff;padding:56px;display:flex;flex-direction:column;justify-content:center}
.login-art .eyebrow{color:var(--accent);letter-spacing:4px;text-transform:uppercase;font-size:12px;font-weight:700}
.login-art h1{font-family:"Fraunces",Georgia,serif;font-size:40px;margin:14px 0}
.login-art p{color:#d7e0f0;font-size:17px;max-width:420px}
.login-form{display:flex;align-items:center;justify-content:center;padding:40px}
.login-box{width:100%;max-width:380px}
.login-box .lb-brand{display:flex;align-items:center;gap:12px;margin-bottom:26px}
.login-box .lb-brand img{width:46px;height:46px;object-fit:contain}
.login-box h2{margin:0 0 4px;font-size:24px}
.login-box .sub{color:var(--muted);margin:0 0 22px}
.login-box .field{margin-bottom:16px}

@media(max-width:960px){ .two-col{grid-template-columns:1fr} .login-wrap{grid-template-columns:1fr} .login-art{display:none} .form-grid{grid-template-columns:1fr} }
@media(max-width:820px){
  .sidebar{position:fixed;left:-260px;transition:left .25s;z-index:60;box-shadow:0 0 40px rgba(0,0,0,.3)}
  .sidebar.open{left:0}
  .mobile-bar{display:flex;align-items:center;gap:12px}
  .menu-btn{background:none;border:0;font-size:24px;color:var(--primary);cursor:pointer}
  .backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:50}
  .backdrop.show{display:block}
}