:root {
  /* MMP brand (official logo): navy wordmark, green gradient symbol */
  --navy: #0b1a33;
  --green: #2a8a5c;
  --green-dark: #1b6e5c;
  --green-light: #6bd65e;
  --ink: #0b1a33;
  --muted: #666;
  --bg: #f7f8f6;
  --card: #ffffff;
  --border: #e3e5e0;
  --red: #c0392b;
  --gold: #c9a227;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
}
a { color: var(--green-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  background: #fff;
  color: var(--navy);
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  border-bottom: 3px solid transparent;
  border-image: linear-gradient(90deg, var(--green-dark), var(--green-light)) 1;
}
.topbar .brand { display: flex; align-items: center; gap: 14px; color: var(--navy); font-weight: 600; }
.topbar .brand:hover { text-decoration: none; }
.topbar .brand img { height: 30px; width: auto; display: block; }
.topbar .brand-text { display: flex; flex-direction: column; line-height: 1.15; padding-left: 14px; border-left: 1px solid var(--border); font-size: 15px; }
.topbar .brand-text small { font-weight: 400; font-size: 12px; color: var(--muted); }
.topbar .user { color: var(--muted); font-size: 14px; }
.topbar .user a { color: var(--green-dark); }
@media (max-width: 600px) {
  .topbar { padding: 10px 16px; }
  .topbar .brand-text { display: none; }
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 24px;
  margin-bottom: 16px;
}

.login-wrap {
  max-width: 380px;
  margin: 80px auto;
}
.login-wrap h1 { font-size: 22px; text-align: center; margin: 20px 0 4px; color: var(--navy); }
.login-brand { text-align: center; margin-bottom: 24px; }
.login-brand img { max-width: 220px; width: 70%; height: auto; }
.login-brand .subtitle { margin: 0; color: var(--muted); font-size: 14px; letter-spacing: .02em; }

form.stack label { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 4px; }
form.stack input, form.stack select, form.stack textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 15px;
}
.btn {
  display: inline-block;
  background: var(--green);
  color: #fff;
  border: none;
  padding: 10px 18px;
  border-radius: 6px;
  font-size: 15px;
  cursor: pointer;
  margin-top: 16px;
}
.btn:hover { background: var(--green-dark); text-decoration: none; color: #fff; }
.btn.secondary { background: #fff; color: var(--ink); border: 1px solid var(--border); }
.btn.secondary:hover { background: #f1f1f1; color: var(--ink); }
.btn:disabled, .btn.disabled { background: #ccc; cursor: not-allowed; pointer-events: none; }

.error { color: var(--red); font-size: 14px; margin-top: 8px; }

.progress-bar { background: #e6e6e6; border-radius: 20px; height: 10px; overflow: hidden; margin: 8px 0 4px; }
.progress-bar > div { background: var(--green); height: 100%; }

.section-list { list-style: none; padding: 0; margin: 0; }
.section-list li {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 16px; border: 1px solid var(--border); border-radius: 8px; margin-bottom: 10px;
  background: #fff;
}
.section-list li.locked { opacity: 0.55; }
.section-list li.passed { border-left: 4px solid var(--green); }
.badge { font-size: 12px; padding: 3px 8px; border-radius: 20px; }
.badge.passed { background: #e5f6ec; color: var(--green-dark); }
.badge.locked { background: #f0f0f0; color: var(--muted); }
.badge.open { background: #fff6dd; color: #8a6d00; }

.lesson-list { list-style: none; padding: 0; }
.lesson-list li {
  padding: 12px 14px; border: 1px solid var(--border); border-radius: 8px; margin-bottom: 8px;
  display: flex; justify-content: space-between; align-items: center;
}
.lesson-list li.done { border-left: 4px solid var(--green); }

.lesson-content h3, .lesson-content h4, .lesson-content h5 { color: var(--ink); margin-top: 24px; }
.lesson-content p { line-height: 1.6; }
.lesson-content ul { line-height: 1.6; }
.lesson-content hr { border: none; border-top: 1px solid var(--border); margin: 20px 0; }

.quiz-q { margin-bottom: 22px; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.quiz-q .qtitle { font-weight: 600; margin-bottom: 10px; }
.quiz-q label { display: block; padding: 6px 0; cursor: pointer; }

.result-pass { color: var(--green-dark); font-size: 22px; font-weight: 700; }
.result-fail { color: var(--red); font-size: 22px; font-weight: 700; }

.cert-banner {
  background: linear-gradient(135deg, #fff9e6, #fff);
  border: 1px solid var(--gold);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
  margin-bottom: 20px;
}

table.admin { width: 100%; border-collapse: collapse; margin-top: 12px; }
table.admin th, table.admin td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 14px; }

.answer-row { padding: 6px 10px; border-radius: 6px; margin: 4px 0; }
.answer-row.is-correct { background: #e5f6ec; color: var(--green-dark); font-weight: 600; }
.answer-row.is-given-wrong { background: #fdecea; color: var(--red); font-weight: 600; }
.card.attempt-wrong { border-left: 4px solid var(--red); }
.card.attempt-correct { border-left: 4px solid var(--green); }

/* Lesson images: brand logos and app screenshots */
.lesson-logo { margin: 4px 0 18px; text-align: center; }
.lesson-logo img { max-width: 220px; height: auto; }
.lesson-fig { margin: 18px auto; text-align: center; }
.lesson-fig img { max-width: 100%; max-height: 560px; width: auto; height: auto; border: 1px solid var(--border); border-radius: 14px; box-shadow: 0 2px 10px rgba(0,0,0,0.08); }
.lesson-fig figcaption { font-size: 13px; color: var(--muted); margin-top: 6px; }