:root {
  --color-primary: #1d5b79;
  --color-primary-dark: #133e54;
  --color-accent: #2fa4a9;
  --color-bg: #f5f8fa;
  --color-card: #ffffff;
  --color-text: #1c2b33;
  --color-muted: #5c7080;
  --color-border: #dbe4ea;
  --color-success: #1c8a5a;
  --color-success-bg: #e7f6ef;
  --color-danger: #c0392b;
  --color-danger-bg: #fdecea;
  --color-warning-bg: #fff6e0;
  --radius: 10px;
  --shadow: 0 2px 10px rgba(20, 40, 60, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

/* ---------- Topbar ---------- */
.topbar {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
}
.topbar-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.brand {
  color: #fff;
  font-size: 1.15rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand:hover { text-decoration: none; }
.brand-mark {
  background: var(--color-accent);
  color: #fff;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}
.brand-sub { font-weight: 400; opacity: 0.85; font-size: 0.95rem; }
.topbar nav a, .topbar nav .nav-user {
  color: #eaf3f6;
  margin-left: 16px;
  font-size: 0.92rem;
}
.topbar nav a:hover { color: #fff; }

/* ---------- Flash messages ---------- */
.flash-stack { margin-bottom: 20px; }
.flash {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 10px;
  font-size: 0.93rem;
}
.flash-danger { background: var(--color-danger-bg); color: var(--color-danger); }
.flash-warning { background: var(--color-warning-bg); color: #8a5c00; }
.flash-info, .flash-success { background: var(--color-success-bg); color: var(--color-success); }

/* ---------- Hero / login ---------- */
.hero {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 32px;
  align-items: start;
  margin-bottom: 48px;
}
@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; }
}
.hero-text h1 { font-size: 2rem; margin-bottom: 8px; color: var(--color-primary-dark); }
.lead { color: var(--color-muted); font-size: 1.02rem; }
.hero-list { padding-left: 20px; color: var(--color-muted); }
.hero-list li { margin-bottom: 4px; }

.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.login-card h2 { margin-top: 0; font-size: 1.2rem; }
.centered-card { max-width: 420px; margin: 40px auto; }

form label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-muted);
  margin: 14px 0 4px;
}
form label .optional { font-weight: 400; color: #9aa8b2; }
form input[type="text"],
form input[type="email"],
form input[type="password"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 0.95rem;
}
form input:focus { outline: 2px solid var(--color-accent); border-color: var(--color-accent); }

.fine-print { font-size: 0.78rem; color: #93a2ac; margin-top: 14px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-secondary { background: #eef3f6; color: var(--color-primary-dark); }
.btn-secondary:hover { background: #dfe9ee; }
.btn-full { width: 100%; margin-top: 18px; }
.btn-lg { padding: 13px 22px; font-size: 1rem; }

/* ---------- Session preview (landing page) ---------- */
.session-preview h2 { color: var(--color-primary-dark); }
.preview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
@media (max-width: 760px) { .preview-grid { grid-template-columns: 1fr; } }
.preview-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px;
  position: relative;
}
.preview-num {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  text-align: center;
  line-height: 26px;
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 8px;
}
.preview-card h3 { margin: 4px 0 8px; font-size: 1.02rem; }
.preview-card p { color: var(--color-muted); font-size: 0.88rem; margin: 0; }

/* ---------- Employee dashboard ---------- */
.session-list { display: flex; flex-direction: column; gap: 16px; margin-top: 24px; }
.session-row {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  box-shadow: var(--shadow);
}
.session-row-main { flex: 1 1 340px; }
.session-badge {
  display: inline-block;
  background: #eef3f6;
  color: var(--color-primary-dark);
  border-radius: 6px;
  padding: 2px 10px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  margin-bottom: 6px;
}
.session-row h2 { margin: 4px 0 6px; font-size: 1.15rem; }
.session-row p { color: var(--color-muted); margin: 0; font-size: 0.93rem; }
.session-row-status {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
  justify-content: center;
}
.session-row-actions { display: flex; gap: 8px; }

.pill {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
}
.pill-todo { background: #eef3f6; color: var(--color-muted); }
.pill-pass { background: var(--color-success-bg); color: var(--color-success); }
.pill-retry { background: var(--color-danger-bg); color: var(--color-danger); }

/* ---------- Theory page ---------- */
.back-link { display: inline-block; margin-bottom: 12px; font-size: 0.88rem; }
.topic-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 28px;
  padding: 14px 16px;
  background: #eef3f6;
  border-radius: var(--radius);
}
.topic-toc a { font-size: 0.85rem; font-weight: 600; }

.topic-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}
.topic-card h2 { margin-top: 0; color: var(--color-primary-dark); font-size: 1.15rem; }
.theory-body h4 { margin: 16px 0 6px; color: var(--color-primary); font-size: 0.98rem; }
.theory-body ul { padding-left: 22px; }
.theory-body li { margin-bottom: 6px; }
.theory-body p { margin: 10px 0; }

.session-footer-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 28px;
  flex-wrap: wrap;
}

/* ---------- Quiz ---------- */
.quiz-question {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-card);
  padding: 18px 20px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}
.quiz-question legend {
  font-weight: 600;
  margin-bottom: 10px;
  padding: 0;
}
.quiz-options { display: flex; flex-direction: column; gap: 8px; }
.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  cursor: pointer;
  font-size: 0.93rem;
}
.quiz-option:hover { background: #f7fafb; }
.quiz-option input { margin-top: 3px; }

/* ---------- Results ---------- */
.result-summary {
  padding: 22px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
}
.result-pass { background: var(--color-success-bg); }
.result-retry { background: var(--color-warning-bg); }
.result-score { font-size: 2rem; font-weight: 800; color: var(--color-primary-dark); }
.result-item {
  border-left: 4px solid var(--color-border);
  padding: 12px 16px;
  margin-bottom: 12px;
  background: var(--color-card);
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: var(--shadow);
}
.result-item.correct { border-left-color: var(--color-success); }
.result-item.incorrect { border-left-color: var(--color-danger); }
.result-question { font-weight: 600; margin: 0 0 6px; }
.result-your-answer, .result-correct-answer { margin: 4px 0; font-size: 0.9rem; }
.result-explanation { margin: 6px 0 0; font-size: 0.88rem; color: var(--color-muted); }
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 700;
  margin-left: 6px;
}
.tag-correct { background: var(--color-success-bg); color: var(--color-success); }
.tag-incorrect { background: var(--color-danger-bg); color: var(--color-danger); }

/* ---------- Certificate banner ---------- */
.cert-banner {
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 20px 0 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.cert-banner-ready {
  background: linear-gradient(135deg, var(--color-success-bg), #eafaf3);
  border: 1px solid #bfe6d3;
}
.cert-banner-ready strong { color: var(--color-success); font-size: 1.05rem; }
.cert-banner-locked {
  background: #eef3f6;
  border: 1px solid var(--color-border);
}
.cert-banner-locked strong { color: var(--color-primary-dark); font-size: 1.02rem; }
.cert-banner p { margin: 4px 0 0; color: var(--color-muted); font-size: 0.9rem; }

/* ---------- Admin ---------- */
.admin-subheading { margin: 28px 0 6px; color: var(--color-primary-dark); font-size: 1.05rem; }
.btn-sm { padding: 6px 12px; font-size: 0.82rem; }
.admin-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.table-wrap { overflow-x: auto; margin-top: 16px; }
.admin-table { width: 100%; border-collapse: collapse; background: var(--color-card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.admin-table th, .admin-table td { padding: 10px 14px; border-bottom: 1px solid var(--color-border); text-align: left; font-size: 0.88rem; }
.admin-table th { background: #eef3f6; color: var(--color-primary-dark); }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--color-border); margin-top: 40px; }
.footer-inner { max-width: 980px; margin: 0 auto; padding: 18px 20px; color: var(--color-muted); font-size: 0.82rem; text-align: center; }