/* Mobile-first. Arabic RTL page; English blocks set dir="ltr" themselves. */

:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #1d2330;
  --muted: #5d6675;
  --border: #d9dde4;
  --brand: #1f5fbf;
  --ok: #1e8449;
  --ok-bg: #e3f4ea;
  --no: #c0392b;
  --no-bg: #fbe5e2;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 16px 40px;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Tahoma, "Noto Sans Arabic", "Geeza Pro", Roboto, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
}

main { max-width: 560px; margin: 0 auto; }

.preview-banner {
  margin: 0 -16px;
  padding: 6px 16px;
  background: var(--no);
  color: #fff;
  font-size: 14px;
  text-align: center;
}

.top {
  max-width: 560px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 52px;
}

.site-title { font-weight: 700; color: var(--brand); text-decoration: none; margin-right: auto; }
.back { color: var(--brand); text-decoration: none; font-weight: 600; padding: 8px 0; }

.crumbs { max-width: 560px; margin: 0 auto 12px; color: var(--muted); font-size: 14px; }
.crumbs:empty { display: none; }

h2 { font-size: 18px; margin: 20px 0 10px; }
h3.source { font-size: 15px; color: var(--muted); margin: 14px 0 8px; text-align: left; }

.list { display: grid; gap: 10px; }

.tile {
  display: block;
  width: 100%;
  padding: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  text-decoration: none;
  font: inherit;
  font-weight: 600;
  text-align: right;
  cursor: pointer;
}
.tile:active { background: #eef2f8; }
.tile small { display: block; color: var(--muted); font-weight: 400; font-size: 14px; }
.tile span[dir="ltr"]:not(.draft-tag) { display: block; text-align: left; }
.workbook::before { content: "📄 "; }

.draft-tag {
  display: inline-block;
  margin-left: 8px; /* the badge is dir="ltr", so a logical margin would land on the wrong side */
  padding: 0 8px;
  border-radius: 6px;
  background: var(--no);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  vertical-align: middle;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
}
.card .source { color: var(--muted); font-size: 14px; margin: 4px 0 0; text-align: left; }
.card .hw-title { margin: 4px 0 0; text-align: left; }

.progress { color: var(--muted); font-size: 14px; }
.progress-bar { height: 6px; background: var(--border); border-radius: 3px; margin: 6px 0 16px; overflow: hidden; }
.progress-bar span { display: block; height: 100%; background: var(--brand); }

.question-text { font-size: 20px; font-weight: 600; text-align: left; margin: 0 0 16px; }

.options { display: grid; gap: 10px; }
.option {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.option:disabled { cursor: default; opacity: 1; color: var(--text); }
.option.correct { border-color: var(--ok); background: var(--ok-bg); }
.option.wrong { border-color: var(--no); background: var(--no-bg); }
.option.correct::after { content: "  ✔"; color: var(--ok); }
.option.wrong::after { content: "  ✘"; color: var(--no); }

.feedback:empty { display: none; }
.feedback { margin-top: 16px; }
.verdict { font-weight: 700; margin: 0 0 6px; }
.verdict.ok, .send-status.ok { color: var(--ok); }
.verdict.no, .send-status.no { color: var(--no); }
.explanation { margin: 0 0 14px; padding: 12px; background: #f1f4f9; border-radius: 10px; }

.btn {
  display: block;
  width: 100%;
  margin-top: 10px;
  padding: 14px;
  border: 1px solid var(--brand);
  border-radius: 12px;
  background: var(--card);
  color: var(--brand);
  font: inherit;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}
.btn.primary { background: var(--brand); color: #fff; }
.btn[hidden] { display: none; }

.result { text-align: center; }
.score { font-size: 44px; font-weight: 800; margin: 4px 0; color: var(--brand); }

.who { margin: 16px 0 0; color: var(--muted); }
.link { background: none; border: 0; padding: 4px; color: var(--brand); font: inherit; text-decoration: underline; cursor: pointer; }

.warning { color: var(--no); background: var(--no-bg); padding: 10px; border-radius: 10px; }
.empty { color: var(--muted); text-align: center; margin-top: 40px; }