.app-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(228,231,236,.78);
  background: rgba(248,250,252,.86);
  backdrop-filter: blur(18px);
}
.nav-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.nav-links { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.nav-link {
  padding: 9px 11px;
  color: var(--muted);
  font-weight: 820;
  border-radius: 11px;
}
.nav-link:hover, .nav-link.active { color: var(--primary-dark); background: var(--primary-soft); }
.nav-mobile-toggle { display: none; }

.status-pill, .badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  padding: 6px 10px;
  font-weight: 850;
  font-size: .78rem;
  border: 1px solid transparent;
  line-height: 1;
}
.status-online { color: var(--success); background: var(--success-soft); border-color: rgba(15,143,95,.16); }
.status-offline { color: var(--warning); background: var(--warning-soft); border-color: rgba(184,107,0,.16); }
.status-sync { color: var(--primary-dark); background: var(--primary-soft); }
.badge-primary { color: var(--primary-dark); background: var(--primary-soft); }
.badge-success { color: var(--success); background: var(--success-soft); }
.badge-warning { color: var(--warning); background: var(--warning-soft); }
.badge-danger { color: var(--danger); background: var(--danger-soft); }
.badge-neutral { color: #344054; background: #f2f4f7; border-color: #eaecf0; }

.toast-wrap {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 120;
  display: grid;
  gap: 10px;
  width: min(360px, calc(100% - 36px));
}
.toast {
  border-radius: 16px;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  animation: toastIn .28s ease both;
}
.toast strong { display: block; margin-bottom: 3px; }
.toast-success { border-color: rgba(15,143,95,.26); }
.toast-error { border-color: rgba(195,58,44,.28); }
@keyframes toastIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.course-card {
  display: grid;
  gap: 13px;
  min-height: 270px;
  position: relative;
  overflow: hidden;
}
.pro-course-card { padding: 0; }
.course-card > :not(.course-cover) { margin-left: 20px; margin-right: 20px; }
.course-card > .course-footer { margin-bottom: 20px; }
.course-cover {
  height: 118px;
  overflow: hidden;
  border-radius: 18px 18px 0 0;
  background: linear-gradient(135deg, var(--primary), #82a1ff);
}
.course-cover img { width: 100%; height: 100%; object-fit: cover; }
.cover-fallback { display: grid; place-items: center; color: white; font-size: 2.7rem; font-weight: 950; }
.course-summary { min-height: 48px; }
.course-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-weight: 750;
}
.course-meta { display: flex; flex-wrap: wrap; gap: 9px; align-items: center; color: var(--muted); font-size: .88rem; }
.course-meta span { display: inline-flex; align-items: center; gap: 4px; }
.course-title { display: flex; justify-content: space-between; gap: 12px; align-items: start; }
.progress-wrap { display: grid; gap: 7px; }
.progress-head { display: flex; justify-content: space-between; gap: 10px; font-size: .86rem; font-weight: 820; color: var(--muted); }
.progress-track {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: #e8edf5;
  overflow: hidden;
  position: relative;
}
.progress-fill {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), #20b47b);
  transition: width .55s cubic-bezier(.2,.8,.2,1);
}
.progress-fill.warning { background: linear-gradient(90deg, #f59e0b, #f6c350); }
.progress-fill.success { background: linear-gradient(90deg, #0f8f5f, #64d490); }

.stat-card {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 128px;
}
.pro-stat {
  position: relative;
  overflow: hidden;
}
.pro-stat:after {
  content: "";
  position: absolute;
  inset: auto -35px -48px auto;
  width: 120px;
  height: 120px;
  border-radius: 999px;
  background: rgba(36,84,255,.07);
}
.stat-value {
  font-size: clamp(1.8rem, 3.6vw, 2.8rem);
  letter-spacing: -0.055em;
  font-weight: 950;
}
.stat-label { color: var(--muted); font-weight: 760; }
.stat-icon {
  width: 46px;
  height: 46px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-weight: 950;
  flex: 0 0 auto;
}

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 700px; }
th, td { padding: 14px 12px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-size: .76rem; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
td { color: #24354d; }
tr:hover td { background: rgba(36,84,255,.035); }
.pro-table { border: 1px solid var(--line); border-radius: 18px; background: white; }
.pro-table table { min-width: 760px; }
.compact-table table { min-width: 650px; }

.module-layout { display: grid; grid-template-columns: 340px 1fr; gap: 22px; align-items: start; }
.module-list { display: grid; gap: 10px; margin-top: 16px; }
.module-item {
  width: 100%;
  text-align: left;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.88);
  border-radius: 16px;
  padding: 14px;
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 8px 12px;
  color: var(--text);
}
.module-number {
  width: 30px;
  height: 30px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--surface-2);
  color: var(--primary-dark);
  font-weight: 900;
  grid-row: span 2;
}
.module-item.active { border-color: rgba(36,84,255,.55); box-shadow: 0 0 0 4px rgba(36,84,255,.08); }
.module-item.completed { border-color: rgba(15,143,95,.35); background: var(--success-soft); }
.module-content { white-space: pre-wrap; line-height: 1.75; color: #25364d; }
.module-detail-card { min-height: 420px; }
.resource-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }

.quiz-shell { max-width: 920px; margin: 0 auto; }
.quiz-question { display: grid; gap: 12px; padding: 20px; border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.88); box-shadow: var(--shadow-soft); }
.quiz-question legend { padding: 0 8px; }
.option-row {
  display: flex;
  align-items: start;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: white;
}
.compact-option { align-items: center; }
.option-row:hover { border-color: rgba(36,84,255,.45); }
.result-card { margin-top: 18px; }

.search-box { position: relative; min-width: min(320px, 100%); }
.search-box input { padding-left: 42px; }
.search-box:before { content: "⌕"; position: absolute; left: 15px; top: 50%; transform: translateY(-50%); color: var(--muted); font-weight: 900; z-index: 1; }
mark { background: #fff19a; color: inherit; padding: 0 2px; border-radius: 4px; }

.compact-list { display: grid; gap: 10px; }
.compact-list > span, .mini-row {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 11px 12px;
  background: rgba(255,255,255,.72);
}
.mini-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.mini-row span { display: block; color: var(--muted); font-size: .82rem; margin-top: 3px; }

@media (max-width: 900px) {
  .nav-mobile-toggle { display: inline-flex; }
  .nav-links {
    position: fixed;
    inset: 72px 12px auto 12px;
    display: none;
    padding: 12px;
    background: white;
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: stretch;
  }
  .nav-links.open { display: flex; }
  .module-layout { grid-template-columns: 1fr; }
  .course-footer { flex-direction: column; align-items: stretch; }
}

/* Professional quiz experience */
.professional-quiz {
  max-width: 1120px;
  margin: 0 auto;
}
.quiz-hero {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 24px;
  align-items: stretch;
  margin-bottom: 22px;
  background:
    radial-gradient(circle at 8% 0%, rgba(36,84,255,.12), transparent 24rem),
    linear-gradient(135deg, rgba(255,255,255,.96), rgba(242,246,255,.95));
}
.quiz-hero:after {
  content: "";
  position: absolute;
  right: -84px;
  top: -84px;
  width: 220px;
  height: 220px;
  border-radius: 999px;
  background: rgba(36,84,255,.08);
}
.quiz-hero-copy {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 14px;
  align-content: center;
}
.quiz-hero h1 {
  font-size: clamp(2rem, 4vw, 3.45rem);
  max-width: 780px;
}
.quiz-hero p {
  max-width: 62ch;
}
.quiz-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 2px;
}
.quiz-score-card {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 10px;
  align-content: center;
  border: 1px solid rgba(36,84,255,.12);
  border-radius: 24px;
  padding: 20px;
  background: rgba(255,255,255,.76);
  box-shadow: var(--shadow-soft);
}
.quiz-score-card span,
.quiz-score-card small {
  color: var(--muted);
  font-weight: 820;
}
.quiz-score-card strong {
  font-size: 2.35rem;
  letter-spacing: -.05em;
}
.quiz-progress-track {
  height: 10px;
  border-radius: 999px;
  background: #e8edf5;
  overflow: hidden;
}
.quiz-progress-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), #20b47b);
  transition: width .28s ease;
}
.quiz-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}
.quiz-sidebar {
  position: sticky;
  top: 92px;
  display: grid;
  gap: 14px;
}
.quiz-dots {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.quiz-dot {
  min-height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: white;
  color: var(--muted);
  font-weight: 900;
}
.quiz-dot:hover,
.quiz-dot.answered {
  color: var(--primary-dark);
  border-color: rgba(36,84,255,.38);
  background: var(--primary-soft);
}
.quiz-form {
  display: grid;
  gap: 18px;
}
.quiz-question {
  position: relative;
  padding: 0;
  border: 1px solid rgba(228,231,236,.96);
  border-radius: 24px;
  background: rgba(255,255,255,.94);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}
.quiz-question legend {
  width: 100%;
  padding: 22px 24px 16px;
  display: grid;
  gap: 9px;
  float: left;
}
.quiz-question legend + .quiz-options {
  clear: both;
}
.question-number {
  width: max-content;
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 6px 10px;
  background: var(--surface-2);
  color: var(--primary-dark);
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 900;
}
.quiz-question legend strong {
  font-size: 1.06rem;
  line-height: 1.45;
  color: var(--text);
}
.quiz-options {
  display: grid;
  gap: 10px;
  padding: 0 24px 24px;
}
.professional-option {
  position: relative;
  align-items: center;
  gap: 12px;
  padding: 14px 15px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(180deg, #fff, #fbfcff);
  transition: border-color .18s ease, box-shadow .18s ease, background .18s ease, transform .18s ease;
}
.professional-option:hover {
  transform: translateY(-1px);
  border-color: rgba(36,84,255,.38);
  box-shadow: 0 10px 22px rgba(16,24,40,.06);
}
.professional-option input {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  accent-color: var(--primary);
}
.professional-option:has(input:checked) {
  border-color: rgba(36,84,255,.58);
  background: var(--primary-soft);
  box-shadow: 0 0 0 4px rgba(36,84,255,.08);
}
.option-letter {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--surface-2);
  color: var(--primary-dark);
  font-weight: 950;
  flex: 0 0 auto;
}
.professional-option:has(input:checked) .option-letter {
  background: var(--primary);
  color: white;
}
.option-text {
  color: #24354d;
  line-height: 1.45;
  font-weight: 720;
}
.quiz-submit-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-radius: 24px;
}
.quiz-submit-card p {
  margin-top: 4px;
}
.result-card {
  text-align: center;
  display: grid;
  justify-items: center;
  gap: 10px;
  background:
    radial-gradient(circle at 50% 0%, rgba(36,84,255,.10), transparent 22rem),
    rgba(255,255,255,.94);
}
.result-card h2 {
  font-size: clamp(2.4rem, 5vw, 4rem);
}

@media (max-width: 900px) {
  .quiz-hero,
  .quiz-layout {
    grid-template-columns: 1fr;
  }
  .quiz-sidebar {
    position: static;
  }
  .quiz-dots {
    grid-template-columns: repeat(8, minmax(34px, 1fr));
  }
}

@media (max-width: 560px) {
  .quiz-hero {
    padding: 22px;
    border-radius: 24px;
  }
  .quiz-dots {
    grid-template-columns: repeat(5, minmax(34px, 1fr));
  }
  .quiz-question legend,
  .quiz-options {
    padding-left: 16px;
    padding-right: 16px;
  }
  .professional-option {
    align-items: flex-start;
  }
  .quiz-submit-card {
    align-items: stretch;
    flex-direction: column;
  }
}