:root{
  --red:#C4161C;
  --charcoal:#33343A;
  --gray:#6D6E71;
  --gray-light:#A7A9AC;
  --bg:#F5F5F7;
  --white:#ffffff;
  --ok:#1d7a3a;
  --warn:#b8860b;
  --danger:#C4161C;
  --radius:10px;
  --shadow:0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.08);
  --maxw:980px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--charcoal);background:var(--bg);line-height:1.5;
  display:flex;flex-direction:column;min-height:100vh;
}

/* ---- Top bar ---- */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  background:var(--charcoal);color:#fff;padding:12px 20px;
  border-bottom:3px solid var(--red);
}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{
  background:var(--red);color:#fff;font-weight:800;letter-spacing:1px;
  padding:4px 9px;border-radius:6px;font-size:15px;
}
.brand-text{font-weight:600;font-size:15px;color:#fff}
.user-box{display:flex;align-items:center;gap:10px;font-size:14px}
.user-name{color:#fff;font-weight:500}

/* ---- Layout ---- */
main#app{flex:1;width:100%;max-width:var(--maxw);margin:0 auto;padding:24px 20px 48px}
.centered{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:60px 0;text-align:center}
.footer{
  background:#ececef;color:var(--gray);font-size:12px;
  display:flex;flex-direction:column;align-items:center;gap:2px;
  padding:14px 20px;border-top:1px solid #ddd;text-align:center;
}

/* ---- Buttons & chips ---- */
.btn,.btn-ghost,.btn-google{
  font:inherit;cursor:pointer;border-radius:8px;border:0;padding:10px 16px;font-weight:600;
}
.btn{background:var(--red);color:#fff}
.btn:hover{background:#a3121a}
.btn:disabled{background:var(--gray-light);cursor:not-allowed}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.4)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-secondary{background:#fff;color:var(--charcoal);border:1px solid var(--gray-light)}
.btn-secondary:hover{background:#f0f0f2}
.chip{
  display:inline-block;background:rgba(255,255,255,.16);color:#fff;
  font-size:11px;font-weight:700;letter-spacing:.4px;text-transform:uppercase;
  padding:3px 8px;border-radius:20px;
}
.chip.solid{background:var(--red)}
.chip.func{background:var(--red);color:#fff}
.chip.aware{background:var(--gray);color:#fff}

/* ---- Sign-in ---- */
.signin-card{
  background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);
  max-width:420px;margin:40px auto;padding:36px 32px;text-align:center;
}
.signin-card h1{font-size:22px;margin:0 0 6px}
.signin-card p{color:var(--gray);margin:0 0 24px;font-size:14px}
.btn-google{
  background:#fff;color:#3c4043;border:1px solid #dadce0;
  display:inline-flex;align-items:center;gap:10px;margin:0 auto;
}
.btn-google:hover{background:#f7f8f8}
.gicon{width:18px;height:18px}
.signin-note{margin-top:18px;font-size:12px;color:var(--gray-light)}

/* ---- Cards / dashboard ---- */
.page-head{margin:0 0 18px}
.page-head h2{margin:0 0 4px;font-size:22px}
.page-head .sub{color:var(--gray);font-size:14px}
.banner{
  background:#fff;border-left:4px solid var(--gray-light);border-radius:8px;
  box-shadow:var(--shadow);padding:14px 16px;margin:0 0 20px;font-size:14px;
}
.banner.warn{border-left-color:var(--warn);background:#fffaf0}
.banner.danger{border-left-color:var(--danger);background:#fdf2f2}
.banner.ok{border-left-color:var(--ok);background:#f1f8f3}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.course-card{
  background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);
  padding:18px;display:flex;flex-direction:column;gap:10px;border-top:3px solid var(--red);
}
.course-card h3{margin:0;font-size:17px}
.course-card .meta{font-size:12px;color:var(--gray)}
.course-card .desc{font-size:13px;color:var(--charcoal);flex:1}
.status-row{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600}
.dot{width:9px;height:9px;border-radius:50%;display:inline-block}
.dot.ok{background:var(--ok)} .dot.warn{background:var(--warn)} .dot.due{background:var(--danger)} .dot.none{background:var(--gray-light)}
.s-ok{color:var(--ok)} .s-warn{color:var(--warn)} .s-due{color:var(--danger)} .s-none{color:var(--gray)}

/* ---- Lesson viewer ---- */
.lesson-wrap{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.lesson-head{background:var(--charcoal);color:#fff;padding:16px 22px}
.lesson-head h2{margin:0;font-size:18px}
.lesson-head .ref{font-size:12px;color:var(--gray-light);margin-top:3px}
.progress{height:6px;background:#e6e6e9}
.progress > i{display:block;height:100%;background:var(--red);transition:width .2s}
.lesson-body{padding:22px 26px;min-height:240px}
.lesson-body h3{margin-top:0}
.lesson-body p{margin:0 0 12px}
.lesson-body ul{margin:0 0 12px;padding-left:22px}
.lesson-body li{margin:4px 0}
.callout{background:#f5f5f7;border-left:4px solid var(--gray-light);border-radius:6px;padding:12px 14px;margin:12px 0;font-size:14px}
.callout b{display:block;margin-bottom:4px;color:var(--charcoal)}
.callout.warn{border-left-color:var(--warn);background:#fffaf0}
.callout.danger{border-left-color:var(--danger);background:#fdf2f2}
.callout.ok{border-left-color:var(--ok);background:#f1f8f3}
.lesson-nav{display:flex;justify-content:space-between;align-items:center;padding:16px 26px;border-top:1px solid #eee}
.crumbs{font-size:13px;color:var(--gray);margin:0 0 14px}
.crumbs a{color:var(--red);cursor:pointer;text-decoration:none}

/* ---- Quiz ---- */
.quiz-q{background:#fff;border-radius:8px;box-shadow:var(--shadow);padding:16px 18px;margin:0 0 14px}
.quiz-q .qtext{font-weight:600;margin:0 0 10px}
.quiz-opt{display:block;padding:9px 12px;border:1px solid #e0e0e3;border-radius:8px;margin:6px 0;cursor:pointer;font-size:14px}
.quiz-opt:hover{background:#f7f7f9}
.quiz-opt.sel{border-color:var(--red);background:#fdf2f2}
.quiz-opt.correct{border-color:var(--ok);background:#f1f8f3}
.quiz-opt.wrong{border-color:var(--danger);background:#fdf2f2}
.quiz-opt input{margin-right:8px}
.explain{font-size:13px;color:var(--gray);margin-top:8px;display:none}
.explain.show{display:block}
.score-box{text-align:center;padding:24px}
.score-num{font-size:40px;font-weight:800}
.score-num.pass{color:var(--ok)} .score-num.fail{color:var(--danger)}

/* ---- Tables (admin / records) ---- */
table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);font-size:13px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid #eee}
th{background:#f0f0f2;font-size:11px;text-transform:uppercase;letter-spacing:.4px;color:var(--gray)}
tr:last-child td{border-bottom:0}
select,input[type=text]{font:inherit;padding:7px 9px;border:1px solid var(--gray-light);border-radius:7px}
.row-actions{display:flex;gap:6px}

/* ---- Certificate ---- */
.cert{background:#fff;border:2px solid var(--charcoal);border-radius:8px;padding:30px;max-width:680px;margin:18px auto;text-align:center;position:relative}
.cert::before{content:"";position:absolute;inset:8px;border:1px solid var(--red);border-radius:5px;pointer-events:none}
.cert h2{color:var(--red);margin:0 0 4px;letter-spacing:1px}
.cert .who{font-size:26px;font-weight:800;margin:14px 0}
.cert .what{font-size:15px;color:var(--charcoal)}
.cert .grid2{display:flex;justify-content:space-around;margin-top:22px;font-size:12px;color:var(--gray)}

.spinner{width:34px;height:34px;border:3px solid #ddd;border-top-color:var(--red);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.muted{color:var(--gray);font-size:13px}
.hidden,[hidden]{display:none !important}
@media print{
  .topbar,.footer,.lesson-nav,.btn,.btn-ghost,.btn-secondary{display:none !important}
  body{background:#fff}
}