/* =====================================================================
   Ujian Digital - Teknik Mesin UNS
   ===================================================================== */
:root{
  --biru:#12395c; --biru-mudah:#1b6fa8; --aksen:#0e8c74;
  --merah:#c0392b; --kuning:#b8860b; --abu:#f4f6f8; --garis:#dfe4ea;
  --teks:#22303c; --redup:#68798a; --radius:10px;
}
*{box-sizing:border-box}
body{
  margin:0; font-family:"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;
  background:var(--abu); color:var(--teks); font-size:15px; line-height:1.55;
}
a{color:var(--biru-mudah); text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1120px; margin:0 auto; padding:0 18px}

/* ---------- Topbar ---------- */
.topbar{background:var(--biru); color:#fff; box-shadow:0 2px 6px rgba(0,0,0,.15)}
.topbar .wrap{display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:10px; min-height:60px}
.brand{display:flex; align-items:center; gap:10px; color:#fff}
.brand:hover{text-decoration:none}
.brand .logo{font-size:26px; line-height:1; background:rgba(255,255,255,.15); border-radius:8px; padding:2px 11px}
.brand small{display:block; font-size:11.5px; opacity:.75; font-weight:400}
.menu{display:flex; gap:4px; flex-wrap:wrap}
.menu a{color:#dce7f0; padding:7px 12px; border-radius:7px; font-size:14px}
.menu a:hover{background:rgba(255,255,255,.12); text-decoration:none}
.menu a.on{background:#fff; color:var(--biru); font-weight:600}
.menu a.keluar{color:#ffc9c2}

.konten{padding:22px 18px 50px}
.kaki{border-top:1px solid var(--garis); padding:16px 0; color:var(--redup); font-size:13px; background:#fff}

/* ---------- Kartu & judul ---------- */
h1{font-size:23px; margin:0 0 4px}
h2{font-size:18px; margin:0 0 12px}
h3{font-size:15.5px; margin:0 0 8px}
.sub{color:var(--redup); margin:0 0 20px; font-size:14px}
.kartu{background:#fff; border:1px solid var(--garis); border-radius:var(--radius); padding:18px; margin-bottom:18px}
.kartu.pad0{padding:0; overflow:hidden}
.kartu h2{border-bottom:1px solid var(--garis); padding-bottom:10px}
.grid{display:grid; gap:14px}
.grid.k2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid.k3{grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}
.grid.k4{grid-template-columns:repeat(auto-fit,minmax(165px,1fr))}
.baris{display:flex; gap:10px; flex-wrap:wrap; align-items:center}
.kanan{margin-left:auto}

/* ---------- Statistik ---------- */
.stat{background:#fff; border:1px solid var(--garis); border-left:4px solid var(--biru-mudah);
      border-radius:var(--radius); padding:14px 16px}
.stat .angka{font-size:27px; font-weight:700; color:var(--biru)}
.stat .label{font-size:12.5px; color:var(--redup); text-transform:uppercase; letter-spacing:.4px}
.stat.hijau{border-left-color:var(--aksen)} .stat.hijau .angka{color:var(--aksen)}
.stat.kuning{border-left-color:var(--kuning)} .stat.kuning .angka{color:var(--kuning)}
.stat.merah{border-left-color:var(--merah)} .stat.merah .angka{color:var(--merah)}

/* ---------- Tabel ---------- */
table{width:100%; border-collapse:collapse; font-size:14px}
th,td{padding:9px 11px; border-bottom:1px solid var(--garis); text-align:left; vertical-align:top}
th{background:#eef2f6; font-size:12.5px; text-transform:uppercase; letter-spacing:.3px; color:#4a5c6d}
tbody tr:hover{background:#fafbfc}
td.num,th.num{text-align:right; font-variant-numeric:tabular-nums}
td.tengah,th.tengah{text-align:center}
.tabel-scroll{overflow-x:auto}

/* ---------- Formulir ---------- */
label{display:block; font-weight:600; font-size:13px; margin:0 0 5px}
input[type=text],input[type=password],input[type=number],input[type=email],
input[type=datetime-local],input[type=date],select,textarea{
  width:100%; padding:9px 11px; border:1px solid #c8d2dc; border-radius:8px;
  font:inherit; background:#fff; color:var(--teks);
}
textarea{min-height:90px; resize:vertical}
input:focus,select:focus,textarea:focus{outline:2px solid #b9d6ee; border-color:var(--biru-mudah)}
.kolom{margin-bottom:14px}
.bantuan{font-size:12px; color:var(--redup); margin-top:4px}
fieldset{border:1px solid var(--garis); border-radius:8px; padding:12px; margin:0 0 14px}
legend{font-weight:600; font-size:13px; padding:0 6px}
.cek{display:flex; align-items:center; gap:8px; font-weight:400; font-size:14px}
.cek input{width:auto}

/* ---------- Tombol ---------- */
.btn{display:inline-block; padding:9px 16px; border-radius:8px; border:1px solid transparent;
     background:var(--biru); color:#fff; font:inherit; font-size:14px; font-weight:600; cursor:pointer}
.btn:hover{background:#0d2c48; text-decoration:none; color:#fff}
.btn.hijau{background:var(--aksen)} .btn.hijau:hover{background:#0a6f5b}
.btn.merah{background:var(--merah)} .btn.merah:hover{background:#96291d}
.btn.abu{background:#fff; color:var(--teks); border-color:#c8d2dc}
.btn.abu:hover{background:#eef2f6; color:var(--teks)}
.btn.kecil{padding:5px 10px; font-size:12.5px}
.btn[disabled]{opacity:.5; cursor:not-allowed}

/* ---------- Lencana ---------- */
.lencana{display:inline-block; padding:2px 9px; border-radius:20px; font-size:11.5px;
         font-weight:600; background:#e6ecf2; color:#40566b; white-space:nowrap}
.lencana.hijau{background:#d9f2e9; color:#0a6f5b}
.lencana.kuning{background:#fdf0d0; color:#8a6300}
.lencana.merah{background:#fbdedb; color:#96291d}
.lencana.biru{background:#dcebf7; color:#12395c}

/* ---------- Peringatan ---------- */
.alert{padding:11px 15px; border-radius:8px; margin-bottom:16px; font-size:14px; border:1px solid}
.alert.sukses{background:#e6f6f0; border-color:#a9dfcc; color:#0a6f5b}
.alert.error{background:#fceceb; border-color:#f0bdb8; color:#96291d}
.alert.info{background:#e6f0f8; border-color:#b6d4ea; color:#12395c}
.kosong{text-align:center; padding:34px 18px; color:var(--redup)}

/* ---------- Login ---------- */
.login-bg{min-height:100vh; display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg,#12395c,#1b6fa8); padding:24px}
.login-kotak{background:#fff; border-radius:14px; padding:30px; width:100%; max-width:400px;
  box-shadow:0 14px 40px rgba(0,0,0,.25)}
.login-kotak .logo{font-size:40px; text-align:center; color:var(--biru); margin-bottom:6px}
.login-kotak h1{text-align:center; font-size:19px}
.login-kotak .sub{text-align:center}

/* ---------- Halaman ujian ---------- */
.ujian-bar{position:sticky; top:0; z-index:50; background:#fff; border-bottom:2px solid var(--biru);
  padding:10px 0; margin-bottom:18px; box-shadow:0 2px 8px rgba(0,0,0,.07)}
.timer{font-size:26px; font-weight:700; font-variant-numeric:tabular-nums; color:var(--biru)}
.timer.bahaya{color:var(--merah); animation:kedip 1s steps(2) infinite}
@keyframes kedip{50%{opacity:.35}}
.navsoal{display:grid; grid-template-columns:repeat(auto-fill,minmax(42px,1fr)); gap:6px}
.navsoal a{display:block; text-align:center; padding:8px 0; border:1px solid var(--garis);
  border-radius:7px; background:#fff; font-size:13px; font-weight:600; color:var(--teks)}
.navsoal a:hover{text-decoration:none; border-color:var(--biru-mudah)}
.navsoal a.terisi{background:#d9f2e9; border-color:#8fd8c1; color:#0a6f5b}
.navsoal a.ragu{background:#fdf0d0; border-color:#e6c76b; color:#8a6300}
.navsoal a.sekarang{outline:3px solid var(--biru-mudah); outline-offset:1px}
.soal-teks{font-size:15.5px; margin-bottom:16px}
.opsi{display:block; border:1px solid var(--garis); border-radius:9px; padding:11px 14px;
  margin-bottom:9px; cursor:pointer; background:#fff; font-weight:400}
.opsi:hover{border-color:var(--biru-mudah); background:#f7fbfe}
.opsi input{margin-right:9px}
.opsi.pilih{border-color:var(--biru-mudah); background:#eaf4fb; font-weight:600}
.opsi.benar{border-color:#8fd8c1; background:#e6f6f0}
.opsi.salah{border-color:#f0bdb8; background:#fceceb}
.status-simpan{font-size:12.5px; color:var(--redup)}

/* ---------- Rubrik koreksi ---------- */
.rubrik{display:grid; grid-template-columns:repeat(auto-fit,minmax(115px,1fr)); gap:9px}
.rubrik .kolom{margin:0}
.jawaban-mhs{background:#fbfcfd; border:1px solid var(--garis); border-left:3px solid var(--biru-mudah);
  border-radius:8px; padding:12px; white-space:pre-wrap; font-size:14px; margin-bottom:12px}

/* ---------- Bar capaian ---------- */
.bar{height:9px; background:#e6ecf2; border-radius:20px; overflow:hidden; margin-top:5px}
.bar span{display:block; height:100%; background:var(--aksen); border-radius:20px}
.bar span.kurang{background:var(--kuning)}
.bar span.rendah{background:var(--merah)}

@media print{
  .topbar,.kaki,.btn,.menu{display:none!important}
  body{background:#fff}
  .kartu{border:none; padding:0}
}
@media(max-width:640px){
  .topbar .wrap{min-height:auto; padding-top:8px; padding-bottom:8px}
  .menu a{padding:6px 9px; font-size:13px}
  h1{font-size:20px}
}