:root{
  --bg: #f3f9fe;
  --panel: #ffffff;
  --panel-soft: #eef7fd;
  --line: #d3e6f4;
  --ink: #0b2540;
  --muted: #5a7691;
  --sky: #0ea5e9;
  --sky-btn: #0284c7;
  --sky-btn-hover: #0369a1;
  --sky-text: #0369a1;
  --sky-soft: rgba(14,165,233,0.14);
  --on-sky: #ffffff;
  --glow: rgba(14,165,233,0.16);
  --shadow: 0 10px 30px rgba(2,132,199,0.10);

  --good-text: #166534;
  --good-bg: rgba(22,163,74,0.10);
  --good-line: rgba(22,163,74,0.35);
  --warn-text: #92400e;
  --warn-bg: rgba(245,158,11,0.12);
  --warn-line: rgba(245,158,11,0.40);
  --bad-text: #b91c1c;
  --bad-bg: rgba(220,38,38,0.10);
}

:root[data-theme="dark"]{
  --bg: #08131d;
  --panel: #0f202f;
  --panel-soft: #142b3f;
  --line: #20415c;
  --ink: #e7f2fb;
  --muted: #8ba8c0;
  --sky: #38bdf8;
  --sky-btn: #38bdf8;
  --sky-btn-hover: #7dd3fc;
  --sky-text: #7dd3fc;
  --sky-soft: rgba(56,189,248,0.16);
  --on-sky: #062338;
  --glow: rgba(56,189,248,0.14);
  --shadow: 0 10px 30px rgba(0,0,0,0.35);

  --good-text: #86efac;
  --good-bg: rgba(74,222,128,0.10);
  --good-line: rgba(74,222,128,0.35);
  --warn-text: #fcd34d;
  --warn-bg: rgba(251,191,36,0.10);
  --warn-line: rgba(251,191,36,0.35);
  --bad-text: #fca5a5;
  --bad-bg: rgba(248,113,113,0.12);
}

*{ box-sizing:border-box; -webkit-tap-highlight-color:transparent; }

body{
  margin:0;
  background:
    radial-gradient(700px 420px at 15% -8%, var(--glow), transparent 60%),
    radial-gradient(600px 400px at 100% 0%, var(--glow), transparent 60%),
    var(--bg);
  min-height:100vh;
  font-family:'Inter', sans-serif;
  color:var(--ink);
  padding:28px 16px 60px;
  transition:background .25s ease, color .25s ease;
}

.wrap{
  position:relative;
  max-width:460px;
  margin:0 auto;
}

header{
  margin:6px 0 22px;
  padding-right:48px;
}

h1{
  font-family:'Space Grotesk', sans-serif;
  font-size:26px;
  font-weight:700;
  line-height:1.2;
  margin:0 0 8px;
}
h1 span{ color:var(--sky); }

p.lede{
  color:var(--muted);
  font-size:14px;
  line-height:1.6;
  margin:0;
}

.theme-toggle{
  position:absolute;
  top:0;
  right:0;
  width:40px;
  height:40px;
  border-radius:12px;
  border:1px solid var(--line);
  background:var(--panel);
  color:var(--ink);
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:border-color .15s ease, background .25s ease;
}
.theme-toggle:hover{ border-color:var(--sky); }
.theme-toggle svg{ width:18px; height:18px; }
.theme-toggle .i-sun{ display:none; }
:root[data-theme="dark"] .theme-toggle .i-sun{ display:block; }
:root[data-theme="dark"] .theme-toggle .i-moon{ display:none; }

.steps-nav{
  display:flex;
  gap:6px;
  margin:0 0 18px;
}
.steps-nav .dot{
  flex:1;
  height:4px;
  border-radius:4px;
  background:var(--line);
  transition:background .3s ease;
}
.steps-nav .dot.active{ background:var(--sky); }
.steps-nav .dot.done{ background:var(--sky); opacity:.45; }

.card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:20px;
  padding:22px 20px;
  margin-bottom:14px;
  box-shadow:var(--shadow);
  transition:background .25s ease, border-color .25s ease;
}
.card h2{
  font-family:'Space Grotesk', sans-serif;
  font-size:18px;
  margin:0 0 4px;
  font-weight:600;
}
.card .sub{
  color:var(--muted);
  font-size:13px;
  margin:0 0 18px;
  line-height:1.55;
}

.mk-grid{ display:flex; flex-direction:column; gap:10px; }

.mk-btn{
  background:var(--panel-soft);
  border:1px solid var(--line);
  border-radius:16px;
  padding:16px;
  cursor:pointer;
  text-align:left;
  transition:border-color .15s ease, transform .1s ease, background .15s ease;
}
.mk-btn:active{ transform:scale(0.99); }
.mk-btn:hover{ border-color:var(--sky); }
.mk-btn.selected{
  border-color:var(--sky);
  background:var(--sky-soft);
}
.mk-btn .mk-title{
  font-family:'Space Grotesk', sans-serif;
  font-size:15.5px;
  font-weight:600;
  display:block;
  margin-bottom:4px;
}
.mk-btn .mk-desc{
  font-size:12.5px;
  color:var(--muted);
  line-height:1.5;
  display:block;
}
.mk-btn .mk-bobot{
  display:inline-block;
  margin-top:8px;
  font-size:11.5px;
  color:var(--sky-text);
  background:var(--sky-soft);
  padding:3px 9px;
  border-radius:20px;
}

.soal-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:9px;
}
.soal-btn{
  background:var(--panel-soft);
  border:1px solid var(--line);
  border-radius:14px;
  padding:14px 6px 12px;
  text-align:center;
  cursor:pointer;
  color:var(--ink);
  transition:border-color .15s ease, transform .1s ease, background .15s ease;
}
.soal-btn:active{ transform:scale(0.98); }
.soal-btn:hover{ border-color:var(--sky); }
.soal-btn.selected{
  border-color:var(--sky);
  background:var(--sky-soft);
}
.soal-btn .n{
  font-family:'Space Grotesk', sans-serif;
  font-size:21px;
  font-weight:700;
  display:block;
}
.soal-btn .lbl{
  font-size:10.5px;
  color:var(--muted);
  display:block;
  margin-top:3px;
}

label.field-label{
  display:block;
  font-size:13px;
  color:var(--muted);
  margin-bottom:8px;
}

input[type=number]{
  width:100%;
  background:var(--panel-soft);
  border:1px solid var(--line);
  border-radius:14px;
  padding:15px 16px;
  color:var(--ink);
  font-size:18px;
  font-family:'Space Grotesk', sans-serif;
  outline:none;
  transition:border-color .15s ease;
}
input[type=number]:focus{ border-color:var(--sky); }

.hint{
  font-size:12px;
  color:var(--muted);
  margin-top:8px;
  line-height:1.5;
}

.btn{
  width:100%;
  background:var(--sky-btn);
  color:var(--on-sky);
  border:none;
  border-radius:14px;
  padding:15px 18px;
  font-family:'Space Grotesk', sans-serif;
  font-weight:700;
  font-size:15px;
  cursor:pointer;
  margin-top:16px;
  transition:background .15s ease, opacity .15s ease, transform .1s ease;
}
.btn:active{ transform:scale(0.99); }
.btn:hover{ background:var(--sky-btn-hover); }
.btn:disabled{ opacity:.35; cursor:not-allowed; }
.btn:disabled:hover{ background:var(--sky-btn); }

.result-row{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  padding:13px 0;
  border-bottom:1px solid var(--line);
}
.result-row:last-child{ border-bottom:none; }
.result-row .k{ color:var(--muted); font-size:13px; }
.result-row .v{
  font-family:'Space Grotesk', sans-serif;
  font-size:19px;
  font-weight:700;
}

.badge{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:52px;
  padding:5px 13px;
  border-radius:10px;
  font-family:'Space Grotesk', sans-serif;
  font-weight:700;
  font-size:14px;
}
.badge.grade-A{ background:var(--good-bg); color:var(--good-text); }
.badge.grade-B{ background:var(--sky-soft); color:var(--sky-text); }
.badge.grade-C{ background:var(--warn-bg); color:var(--warn-text); }
.badge.grade-D, .badge.grade-E{ background:var(--bad-bg); color:var(--bad-text); }

.banner{
  border-radius:14px;
  padding:14px 15px;
  font-size:13px;
  line-height:1.6;
  margin-bottom:16px;
}
.banner.warn{
  background:var(--warn-bg);
  border:1px solid var(--warn-line);
  color:var(--warn-text);
}
.banner.good{
  background:var(--good-bg);
  border:1px solid var(--good-line);
  color:var(--good-text);
}

.final-score{ text-align:center; padding:18px 0 6px; }
.final-score .num{
  font-family:'Space Grotesk', sans-serif;
  font-size:48px;
  font-weight:700;
  line-height:1;
}
.final-score .cat{ margin-top:8px; }

.disclaimer{
  color:var(--muted);
  font-size:11.5px;
  line-height:1.6;
  text-align:center;
  margin-top:22px;
  padding:0 8px;
}

.restart-link{
  display:block;
  text-align:center;
  color:var(--muted);
  font-size:12.5px;
  margin-top:12px;
  cursor:pointer;
  text-decoration:underline;
  text-underline-offset:3px;
}
.restart-link:hover{ color:var(--sky-text); }

.hidden{ display:none !important; }