/* ORV Register - mobile first. Brand: dark blue #002978, lime #ccdb2c, cream #EDE8D9. */
:root{
  --blue:#002978; --lime:#ccdb2c; --cream:#EDE8D9; --ink:#14213d; --muted:#5c6577;
  --line:#d8d2bf; --card:#fff; --bad:#b3261e; --ok:#1f7a3d; --warn:#8a5a00;
  --r:14px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--cream);color:var(--ink);font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}
.hidden{display:none!important}

.top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;background:var(--blue);color:#fff}
.brand{color:#fff;text-decoration:none;font-weight:700;letter-spacing:.2px}
.brand span{color:var(--lime);font-weight:600}
.langs{display:flex;gap:4px}
.langs a{color:#fff;text-decoration:none;font-size:12px;font-weight:600;padding:5px 8px;border-radius:999px;border:1px solid rgba(255,255,255,.35)}
.langs a.on{background:var(--lime);color:var(--blue);border-color:var(--lime)}

main{max-width:520px;margin:0 auto;padding:16px}
.card{background:var(--card);border-radius:var(--r);padding:20px 18px;margin-bottom:14px;box-shadow:0 1px 3px rgba(0,41,120,.12)}
.card.center{text-align:center}
h1{font-size:22px;margin:0 0 14px;color:var(--blue)}
h2{font-size:17px;margin:0;color:var(--blue)}
.lead{color:var(--muted);margin:0 0 16px}
.muted{color:var(--muted);margin:8px 0 0}

label{display:block;font-weight:600;margin:14px 0 6px}
input[type=text],textarea{width:100%;font:inherit;font-size:20px;padding:12px 14px;border:2px solid var(--line);border-radius:10px;background:#fff;color:var(--ink)}
input[type=text]{letter-spacing:1px}
textarea{font-size:16px;letter-spacing:0;resize:vertical;margin-top:14px}
input:focus,textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(0,41,120,.15)}
small{display:block;color:var(--muted);margin-top:4px}
.status{min-height:22px;color:var(--warn);font-size:14px;margin:12px 0 4px}

button,.link{font:inherit;cursor:pointer}
.primary,.danger,.ghost,.warn{display:block;width:100%;padding:14px 16px;border-radius:12px;border:2px solid transparent;font-weight:700;font-size:17px;text-align:center;text-decoration:none;margin-top:10px}
.primary{background:var(--blue);color:#fff}
.primary:disabled{opacity:.5}
.danger{background:#fff;color:var(--bad);border-color:var(--bad)}
.ghost{background:#fff;color:var(--blue);border-color:var(--line)}
.warn{background:#fff;color:var(--warn);border-color:#e1c585}
.small{display:inline-block;width:auto;margin:0;padding:8px 12px;font-size:14px}

.seg{display:flex;gap:0;margin-bottom:6px;border:2px solid var(--blue);border-radius:12px;overflow:hidden}
.seg-btn{flex:1;padding:12px 8px;border:0;background:#fff;color:var(--blue);font-weight:700;font-size:16px}
.seg-btn.on{background:var(--blue);color:#fff}

.role-grid{display:grid;gap:12px}
.role{display:block;padding:26px 16px;border-radius:var(--r);text-decoration:none;font-size:22px;font-weight:700;text-align:center}
.role.student{background:var(--blue);color:#fff}
.role.teacher{background:var(--lime);color:var(--blue)}

.result{text-align:center}
.result-icon{width:64px;height:64px;border-radius:50%;margin:4px auto 10px;display:flex;align-items:center;justify-content:center;font-size:34px;font-weight:700;color:#fff;background:var(--muted)}
.result-icon.ok{background:var(--ok)}
.result-icon.bad{background:var(--bad)}
.details{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;text-align:left;margin:14px 0;padding:12px 14px;background:#f6f4ea;border-radius:10px}
.details:empty{display:none}
.details dt{color:var(--muted);font-size:14px}
.details dd{margin:0;font-weight:600}
.ok-note{color:var(--ok);font-weight:600}

/* teacher: class code */
.codecard{text-align:center;background:var(--blue);color:#fff}
.codecard .eyebrow{margin:0 0 6px;font-size:14px;opacity:.85}
.codelabel{margin:8px 0 0;font-size:14px;text-transform:uppercase;letter-spacing:.12em;color:var(--lime);font-weight:700}
.bigcode{margin:0;font-size:clamp(64px,26vw,120px);line-height:1.05;font-weight:800;letter-spacing:.08em;color:var(--lime);word-break:break-all}
.hint{margin:6px 0 0;font-size:14px;opacity:.9}

.roster-head{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:8px}
.count{background:var(--lime);color:var(--blue);font-weight:700;font-size:13px;padding:3px 10px;border-radius:999px}
.roster{list-style:none;margin:0;padding:0}
.roster li{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 0;border-top:1px solid var(--line)}
.roster li:first-child{border-top:0}
.roster .who{display:flex;flex-direction:column;min-width:0}
.roster .who span{font-size:13px;color:var(--muted)}
.roster .who em{font-size:12px;color:var(--bad);font-style:normal;font-weight:600}
.roster li.absent strong{text-decoration:line-through;color:var(--muted)}

@media (min-width:560px){ main{padding-top:28px} }