:root {
  --ink: #1b2430;
  --ink-soft: #2a3542;
  --teal: #0f766e;
  --teal-dark: #0b5a54;
  --teal-soft: #ecf3f1;
  --amber: #b4690e;
  --amber-soft: #fbf1e2;
  --muted: #5b6470;
  --rule: #e4e2db;
  --paper: #fbfaf7;
  --panel: #ffffff;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "Courier New", Courier, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
}

.wrap { max-width: 960px; margin: 0 auto; padding: 20px 16px 72px; }

/* ---------- masthead ---------- */
.masthead {
  background: var(--ink);
  color: #fff;
  border-radius: 14px;
  padding: 26px 26px 22px;
  margin-bottom: 24px;
}
.masthead .eyebrow {
  font-size: 11.5px; letter-spacing: .18em; text-transform: uppercase;
  color: #9fb4b0; font-weight: 700; margin-bottom: 10px;
}
.masthead h1 { margin: 0 0 8px; font-size: 25px; line-height: 1.25; }
.masthead p { margin: 0; color: #e7ece9; font-size: 15px; }

a.back {
  display: inline-block; margin-bottom: 16px; color: var(--teal-dark);
  text-decoration: none; font-weight: 600; font-size: 14.5px;
}
a.back:hover { text-decoration: underline; }

/* ---------- generic blocks ---------- */
h2 { font-size: 19px; margin: 28px 0 12px; }

.note, .warn {
  border-radius: 10px; padding: 14px 18px; margin: 16px 0; font-size: 14.5px;
}
.note { background: var(--teal-soft); border-left: 4px solid var(--teal); color: #2a3b38; }
.warn { background: var(--amber-soft); border-left: 4px solid var(--amber); color: #6b4310; }
.note strong, .warn strong { display: block; margin-bottom: 4px; }

.vars {
  font-family: var(--mono); font-size: 16px; font-weight: 700;
  background: var(--amber-soft); border-left: 4px solid var(--amber);
  padding: 12px 18px; border-radius: 10px; margin: 14px 0 18px;
  white-space: pre-wrap;
}

/* ---------- menu cards ---------- */
.menu { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 8px; }
.menu a {
  display: block; text-decoration: none; color: inherit;
  background: var(--panel); border: 1px solid var(--rule);
  border-top: 4px solid var(--teal); border-radius: 12px; padding: 18px;
}
.menu a:hover { border-color: var(--teal); box-shadow: 0 6px 18px -12px rgba(15,118,110,.6); }
.menu h3 { margin: 0 0 6px; font-size: 17px; }
.menu p { margin: 0; font-size: 14px; color: var(--muted); }

/* ---------- tabs ---------- */
.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0 18px; }
.tabs button {
  font-family: inherit; font-size: 14px; font-weight: 600; cursor: pointer;
  background: var(--panel); color: var(--ink);
  border: 1px solid var(--rule); border-radius: 999px; padding: 8px 16px;
}
.tabs button[aria-selected="true"] { background: var(--teal); color: #fff; border-color: var(--teal); }

/* ---------- parsons ---------- */
.headerline {
  font-family: var(--mono); font-size: 15px; font-weight: 700;
  background: #f7f7f2; border: 1px solid var(--rule); border-radius: 8px;
  padding: 10px 14px; margin: 10px 0 18px; white-space: pre; overflow-x: auto;
}
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.col { background: var(--panel); border: 1px solid var(--rule); border-radius: 12px; padding: 14px; }
.col h3 { margin: 0 0 4px; font-size: 15px; }
.col .hint { margin: 0 0 10px; font-size: 12.5px; color: var(--muted); }

.slot-list { list-style: none; margin: 0; padding: 0; min-height: 60px; }
.slot-list.empty::after {
  content: attr(data-empty); display: block; text-align: center; color: var(--muted);
  font-size: 13px; font-style: italic; padding: 18px 6px;
  border: 1px dashed var(--rule); border-radius: 8px;
}

.card {
  display: flex; align-items: stretch; gap: 8px; margin-bottom: 8px;
  border: 1px solid var(--rule); border-radius: 8px; background: #fff; overflow: hidden;
}
.card .letter {
  flex: 0 0 34px; display: flex; align-items: center; justify-content: center;
  background: #f3f2ec; font-weight: 700; font-size: 15px;
}
.card .code {
  flex: 1 1 auto; font-family: var(--mono); font-size: 14px;
  padding: 10px 8px; white-space: pre; overflow-x: auto; display: flex; align-items: center;
}
.card .num {
  flex: 0 0 26px; display: flex; align-items: center; justify-content: center;
  color: var(--muted); font-size: 12.5px; font-variant-numeric: tabular-nums;
}
.card button {
  font-family: inherit; border: none; background: transparent; cursor: pointer;
  color: var(--teal-dark); font-size: 15px; padding: 0 9px;
}
.card button:hover { background: var(--teal-soft); }
.card .move { display: flex; flex-direction: column; border-left: 1px solid var(--rule); }
.card .move button { flex: 1; padding: 0 8px; line-height: 1; }

.card.ok { border-color: var(--teal); background: var(--teal-soft); }
.card.bad { border-color: var(--amber); background: var(--amber-soft); }

.card.clickable { cursor: pointer; }
.card.clickable:hover { border-color: var(--teal); }

/* ---------- kondisi table ---------- */
table.kondisi { border-collapse: collapse; width: 100%; font-size: 15px; background: var(--panel); }
table.kondisi th {
  background: var(--teal); color: #fff; text-align: left; font-size: 13px;
  padding: 10px 12px;
}
table.kondisi th.c, table.kondisi td.c { text-align: center; }
table.kondisi td { border-top: 1px solid var(--rule); padding: 8px 12px; vertical-align: middle; }
table.kondisi td.cond { font-family: var(--mono); font-size: 14.5px; }
table.kondisi tr.ok td { background: var(--teal-soft); }
table.kondisi tr.bad td { background: var(--amber-soft); }

.choice {
  font-family: inherit; font-size: 13.5px; font-weight: 600; cursor: pointer;
  border: 1px solid var(--rule); background: #fff; border-radius: 999px;
  padding: 5px 14px; min-width: 62px;
}
.choice[aria-pressed="true"] { background: var(--teal); color: #fff; border-color: var(--teal); }

/* ---------- actions & feedback ---------- */
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 6px; }
.btn {
  font-family: inherit; font-size: 15px; font-weight: 600; cursor: pointer;
  border-radius: 8px; padding: 11px 22px; border: 1px solid var(--teal);
  background: var(--teal); color: #fff;
}
.btn.secondary { background: #fff; color: var(--teal-dark); }
.btn:hover { opacity: .92; }

.feedback { margin-top: 16px; }
.feedback:empty { display: none; }
.result {
  border-radius: 10px; padding: 14px 18px; font-size: 15px; margin-bottom: 12px;
}
.result.pass { background: var(--teal-soft); border-left: 4px solid var(--teal); color: #12433e; }
.result.fail { background: var(--amber-soft); border-left: 4px solid var(--amber); color: #6b4310; }
.result strong { display: block; font-size: 16px; margin-bottom: 3px; }
.diag { background: var(--panel); border: 1px solid var(--rule); border-radius: 10px; padding: 14px 18px; }
.diag h4 { margin: 0 0 8px; font-size: 14.5px; }
.diag ul { margin: 0; padding-left: 20px; font-size: 14.5px; }
.diag li { margin: 6px 0; }
.diag code { font-family: var(--mono); background: #f3f2ec; padding: 1px 5px; border-radius: 4px; }

footer {
  margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--rule);
  font-size: 12.5px; color: var(--muted);
}

@media (max-width: 720px) {
  .cols, .menu { grid-template-columns: 1fr; }
  .masthead h1 { font-size: 21px; }
  body { font-size: 15px; }
}