/* public/styles.css */
:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #1a1a1a;
  --muted: #6b7280;
  --line: #e3e6ea;
  --accent: #2d5fa6;
  --good: #1f7a4d;
  --bad: #b23b3b;
  --good-bg: #e6f4ec;
  --bad-bg: #fbeaea;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}
header { padding: 24px 20px 8px; }
h1 { margin: 0; font-size: 1.5rem; }
.subtitle { margin: 4px 0 0; color: var(--muted); font-size: 0.9rem; }
.tabs { display: flex; gap: 4px; padding: 8px 20px 0; border-bottom: 1px solid var(--line); }
.tab {
  border: none; background: none; padding: 10px 16px; cursor: pointer;
  font-size: 0.95rem; color: var(--muted); border-bottom: 2px solid transparent;
}
.tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }
main { max-width: 760px; margin: 0 auto; padding: 20px; }
.panel { display: none; }
.panel.active { display: block; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 20px; box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
.hidden { display: none !important; }
.muted { color: var(--muted); font-size: 0.9rem; }
.meta { color: var(--muted); font-size: 0.85rem; margin-bottom: 12px; min-height: 1.2em; }
.reasons { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.reasons span {
  background: #eef2f8; color: var(--accent); border-radius: 999px;
  padding: 3px 10px; font-size: 0.75rem;
}
.prompt { font-size: 1.1rem; font-weight: 600; margin: 0 0 16px; }
.options { display: grid; gap: 10px; }
.option {
  text-align: left; border: 1px solid var(--line); background: #fff; border-radius: 10px;
  padding: 12px 14px; cursor: pointer; font-size: 0.98rem;
}
.option:hover { border-color: var(--accent); }
.option.selected { border-color: var(--accent); background: #eef2f8; }
.option.correct { border-color: var(--good); background: var(--good-bg); }
.option.wrong { border-color: var(--bad); background: var(--bad-bg); }
.actions { display: flex; gap: 10px; margin-top: 18px; }
button {
  font: inherit; padding: 10px 16px; border-radius: 10px; border: 1px solid var(--accent);
  background: var(--accent); color: #fff; cursor: pointer;
}
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.ghost { background: #fff; color: var(--accent); }
.feedback { margin-top: 16px; padding: 12px 14px; border-radius: 10px; font-size: 0.95rem; }
.feedback.correct { background: var(--good-bg); color: var(--good); }
.feedback.wrong { background: var(--bad-bg); color: var(--bad); }
.readiness {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 24px;
}
.readiness > div {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px; text-align: center;
}
.readiness-value { font-size: 1.8rem; font-weight: 700; color: var(--accent); }
.topic-row { margin-bottom: 14px; }
.topic-head { display: flex; justify-content: space-between; font-size: 0.9rem; margin-bottom: 4px; }
.bar { height: 10px; background: #e9edf3; border-radius: 999px; overflow: hidden; }
.bar > div { height: 100%; background: var(--accent); }
footer {
  max-width: 760px; margin: 0 auto; padding: 16px 20px 40px;
  display: flex; justify-content: space-between; font-size: 0.8rem; color: var(--muted);
}

/* ---- auth + role-based additions ---- */
.auth { max-width: 460px; margin: 24px auto; }
.card.narrow { max-width: 460px; }
.authpanel { display: none; flex-direction: column; gap: 10px; margin-top: 12px; }
.authpanel.active { display: flex; }
label { display: block; font-size: 0.9rem; color: var(--ink); margin-bottom: 4px; }
input, textarea, select { width: 100%; padding: 9px 10px; border: 1px solid var(--line); border-radius: 8px; font: inherit; margin-top: 3px; }
.error { color: var(--bad); font-size: 0.9rem; min-height: 1.1em; }
.small { font-size: 0.78rem; }
.markscheme { margin-top: 12px; padding: 12px; background: #f3f6fb; border-radius: 8px; font-size: 0.95rem; }
.award { margin-top: 12px; }
.list-row { display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: #fff; margin-bottom: 8px; }
button.small { padding: 6px 12px; font-size: 0.85rem; }
button.link { background: none; border: none; color: var(--accent); cursor: pointer; padding: 0; }
.trend { display: flex; gap: 5px; flex-wrap: wrap; margin-bottom: 16px; min-height: 16px; }
.dot { width: 14px; height: 14px; border-radius: 50%; display: inline-block; }
.dot.ok { background: var(--good); }
.dot.no { background: var(--bad); }
#add-question label { margin-top: 8px; }

/* --- auth + admin additions --- */
.auth-card { max-width: 420px; margin: 40px auto; }
.auth-card label, .card label { display: block; margin: 10px 0; font-size: 0.9rem; color: var(--ink); }
.auth-card input, .card input, .card select, .card textarea, #written-answer {
  width: 100%; padding: 9px 11px; margin-top: 4px; border: 1px solid var(--line);
  border-radius: 8px; font: inherit; box-sizing: border-box;
}
#written-answer { margin-top: 12px; }
.markscheme { margin-top: 14px; padding: 12px 14px; background: #eef2f8; border-radius: 10px; font-size: 0.92rem; white-space: pre-wrap; }
.selfmark { margin-top: 12px; }
.selfmark input { width: 90px; }
.ghost-tab { margin-left: auto; border: none; background: none; color: var(--muted); }
#users table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
#users th, #users td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); }
#users button { padding: 5px 10px; font-size: 0.8rem; }
.badge { font-size: 0.72rem; padding: 2px 8px; border-radius: 999px; background: #eef2f8; color: var(--accent); }
.inactive { color: var(--muted); }
h3 { margin: 8px 0; font-size: 1rem; }