:root {
  --bg: #f6f5fb;
  --card: #ffffff;
  --text: #1e1b2e;
  --muted: #6b6880;
  --line: #e4e1ef;
  --accent: #7c5cff;
  --ok: #1f9d55;
  --ok-bg: #e7f7ee;
  --bad: #d64545;
  --bad-bg: #fdecec;
  --radius: 16px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15131d;
    --card: #1f1c2b;
    --text: #eeeaf7;
    --muted: #a19db5;
    --line: #322e44;
    --ok-bg: #12301f;
    --bad-bg: #3a1a1c;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 17px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.top {
  display: flex; justify-content: space-between; align-items: center;
  max-width: 760px; margin: 0 auto; padding: 14px 16px;
}
.brand { font-weight: 800; font-size: 20px; color: var(--accent); text-decoration: none; }
#who { display: flex; gap: 10px; align-items: center; font-size: 15px; color: var(--muted); }
#who a { color: var(--muted); }
main { max-width: 760px; margin: 0 auto; padding: 0 16px 48px; }
h1 { font-size: 26px; margin: 12px 0 18px; }
h2 { font-size: 19px; margin: 24px 0 10px; }
a { color: var(--accent); }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px;
}
.grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.people { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin-top: 24px; }
.person {
  border: 0; border-radius: 22px; padding: 36px 16px; font-size: 28px; font-weight: 800;
  color: #fff; cursor: pointer; box-shadow: 0 6px 20px rgba(0,0,0,.12);
}
.person small { display: block; font-size: 15px; font-weight: 500; opacity: .9; margin-top: 4px; }
.person:hover { transform: translateY(-2px); }

.subject {
  text-align: left; cursor: pointer; font: inherit; color: inherit;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px;
}
.subject:hover { border-color: var(--accent); }
.subject b { font-size: 18px; display: block; }
.subject .meta { color: var(--muted); font-size: 14px; }
.subject .topic { font-size: 13px; color: var(--accent); margin-top: 4px; }

.bar { height: 8px; background: var(--line); border-radius: 99px; overflow: hidden; margin: 8px 0 4px; }
.bar > i { display: block; height: 100%; background: var(--accent); border-radius: 99px; transition: width .5s; }

.qhead { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.qhead h1 { margin-bottom: 4px; }
.pill {
  display: inline-block; padding: 2px 10px; border-radius: 99px; font-size: 13px;
  background: var(--line); color: var(--muted);
}
.topicbar {
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin: 8px 0 16px; font-size: 15px;
}
.topicbar .pill { background: color-mix(in srgb, var(--accent) 15%, transparent); color: var(--accent); }
.topicform { display: grid; gap: 10px; margin: 8px 0 16px; }
.topicform .row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

.prompt { font-size: 21px; white-space: pre-wrap; margin: 8px 0 18px; }
.options { display: grid; gap: 10px; }
.opt {
  font: inherit; text-align: left; padding: 14px 16px; border-radius: 12px; cursor: pointer;
  border: 2px solid var(--line); background: var(--card); color: var(--text);
}
.opt:hover:not(:disabled) { border-color: var(--accent); }
.opt.right { border-color: var(--ok); background: var(--ok-bg); }
.opt.wrong { border-color: var(--bad); background: var(--bad-bg); }
.answerrow { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
input[type=text] {
  font: inherit; font-size: 20px; padding: 10px 14px; border-radius: 12px;
  border: 2px solid var(--line); background: var(--card); color: var(--text); min-width: 0; flex: 1 1 180px;
}
input[type=text]:focus { outline: none; border-color: var(--accent); }
.unit { font-size: 20px; color: var(--muted); }

button.btn {
  font: inherit; font-weight: 600; border: 0; border-radius: 12px; padding: 11px 20px; cursor: pointer;
  background: var(--accent); color: #fff;
}
button.btn.ghost { background: transparent; color: var(--muted); border: 1px solid var(--line); }
button.btn.small { padding: 6px 12px; font-size: 14px; }
button:disabled { opacity: .55; cursor: default; }
.tools { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.hint { margin-top: 14px; padding: 12px 14px; border-radius: 12px; background: color-mix(in srgb, var(--accent) 10%, transparent); }

.feedback { margin-top: 18px; padding: 16px; border-radius: 14px; }
.feedback.ok { background: var(--ok-bg); border: 1px solid var(--ok); }
.feedback.bad { background: var(--bad-bg); border: 1px solid var(--bad); }
.feedback h3 { margin: 0 0 6px; }
.feedback p { margin: 6px 0; white-space: pre-wrap; }
.levelchange { font-size: 14px; color: var(--muted); }

.loading { text-align: center; padding: 48px 16px; color: var(--muted); }
.spinner {
  width: 36px; height: 36px; margin: 0 auto 14px; border-radius: 50%;
  border: 4px solid var(--line); border-top-color: var(--accent); animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.error { color: var(--bad); }

table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 7px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
td.ok { color: var(--ok); } td.bad { color: var(--bad); }
.tablewrap { overflow-x: auto; }
.muted { color: var(--muted); }

/* --- karakter --- */
.grade {
  display: inline-flex; flex-direction: column; align-items: center; justify-content: center;
  min-width: 40px; padding: 2px 8px; border-radius: 10px; font-weight: 800; line-height: 1.2;
  color: #fff; background: var(--muted);
}
.grade .gnum { font-size: 16px; }
.grade.big { min-width: 104px; padding: 10px 12px; border-radius: 16px; gap: 2px; flex: 0 0 auto; }
.grade.big .gnum { font-size: 40px; }
.grade .glabel { font-size: 12px; font-weight: 600; opacity: .95; }
.grade .gbar { width: 100%; height: 5px; border-radius: 99px; background: rgba(255,255,255,.35); overflow: hidden; }
.grade .gbar > i { display: block; height: 100%; background: #fff; transition: width .5s; }
.g-top { background: #1f9d55; }
.g-mid { background: #2f80ed; }
.g-low { background: #d98200; }
.g-bad { background: #d64545; }
.g-none { background: var(--line); color: var(--muted); }
.qtop { display: flex; gap: 16px; align-items: center; margin-top: 8px; }
.subjhead { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.pts { float: right; font-size: 15px; font-weight: 600; opacity: .8; }
.gradechange { font-weight: 700; }
.gradechange.up { color: var(--ok); }
.gradechange.down { color: var(--bad); }
.select {
  font: inherit; padding: 9px 12px; border-radius: 12px; border: 2px solid var(--line);
  background: var(--card); color: var(--text);
}
.retrybanner {
  margin: -4px 0 12px; padding: 8px 12px; border-radius: 10px; font-size: 15px; font-weight: 600;
  background: color-mix(in srgb, #d98200 16%, transparent); color: #b36b00;
}
@media (prefers-color-scheme: dark) { .retrybanner { color: #f0a840; } }
.linkbtn { font: inherit; background: none; border: 0; padding: 0; color: var(--muted); text-decoration: underline; cursor: pointer; }