:root {
  --pyc-navy: #0b1f45;
  --pyc-navy-soft: rgba(11, 31, 69, 0.84);
  --pyc-navy-deep: #08162d;
  --pyc-blue: #2f6fb6;
  --pyc-sky: #71a9ef;
  --pyc-cyan: #4da0ff;
  --pyc-yellow: #ffd24a;
  --pyc-gold: #f5b21e;
  --pyc-surface: rgba(255, 255, 255, 0.9);
  --pyc-border: rgba(61, 106, 166, 0.18);
  --pyc-shadow: 0 22px 55px rgba(10, 32, 73, 0.14);
}

html,
body {
  min-height: 100%;
}

body.pythonicos-body {
  font-family: "Inter", system-ui, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(255, 210, 74, 0.22), transparent 24%),
    radial-gradient(circle at top right, rgba(113, 169, 239, 0.3), transparent 34%),
    radial-gradient(circle at 50% 16%, rgba(47, 111, 182, 0.12), transparent 26%),
    linear-gradient(180deg, #fdfcf6 0%, #f2f7ff 36%, #edf4ff 100%);
  color: #0f172a;
}

.pythonicos-navbar {
  background:
    radial-gradient(circle at top right, rgba(255, 210, 74, 0.2), transparent 18%),
    linear-gradient(120deg, rgba(8, 22, 45, 0.98), rgba(15, 41, 82, 0.96) 58%, rgba(23, 58, 103, 0.96));
  box-shadow: 0 10px 35px rgba(8, 22, 45, 0.24);
  backdrop-filter: blur(18px);
  transition: box-shadow 0.2s ease, background-color 0.2s ease;
  border-bottom: 1px solid rgba(255, 210, 74, 0.12);
}

.pythonicos-navbar.navbar-scrolled {
  box-shadow: 0 18px 38px rgba(8, 22, 45, 0.3);
}

.pythonicos-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: #fff;
  font-weight: 800;
  letter-spacing: -0.03em;
  white-space: nowrap;
}

.pythonicos-brand:hover {
  color: #fff;
}

.pythonicos-logo {
  display: inline-block;
  width: 3rem;
  height: 3rem;
  flex: 0 0 auto;
  object-fit: contain;
  filter: drop-shadow(0 10px 24px rgba(8, 22, 45, 0.2));
}

.pythonicos-brand-title {
  color: #fff;
  font-size: 0.96rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1;
}

.pythonicos-search {
  width: min(100%, 28rem);
}

.pythonicos-search .form-control {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #fff;
  padding-block: 0.8rem;
  padding-inline: 1rem;
}

.pythonicos-search .form-control::placeholder {
  color: rgba(255, 255, 255, 0.62);
}

.pythonicos-search .form-control:focus {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 210, 74, 0.55);
  box-shadow: 0 0 0 0.25rem rgba(255, 210, 74, 0.12);
  color: #fff;
}

.pythonicos-navlink {
  color: rgba(255, 255, 255, 0.86);
  border-radius: 999px;
  padding-inline: 0.95rem;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.pythonicos-navlink:hover,
.pythonicos-navlink:focus {
  color: #fff;
  background: linear-gradient(135deg, rgba(255, 210, 74, 0.16), rgba(113, 169, 239, 0.12));
  transform: translateY(-1px);
}

.pythonicos-cta {
  border-radius: 999px;
  padding-inline: 1rem;
  font-weight: 700;
}

.pythonicos-main {
  padding-block: 2rem 4rem;
}

.pythonicos-footer {
  border-top: 1px solid rgba(148, 163, 184, 0.18);
  padding: 1.5rem 0 2.5rem;
  color: #64748b;
}

.alert {
  border: 0;
  border-radius: 1.1rem;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

.card,
.accordion-item,
.list-group-item,
.dropdown-menu,
.modal-content {
  border-color: var(--pyc-border);
}

.card,
.accordion-item,
.pythonicos-panel {
  background: var(--pyc-surface);
  backdrop-filter: blur(10px);
  box-shadow: var(--pyc-shadow);
  border-radius: 1.35rem;
}

.card .card-body {
  position: relative;
  z-index: 1;
}

.btn {
  border-radius: 0.95rem;
  font-weight: 600;
}

.btn-primary {
  background: linear-gradient(135deg, var(--pyc-yellow), var(--pyc-gold));
  border-color: transparent;
  color: #10233f;
  box-shadow: 0 14px 28px rgba(245, 178, 30, 0.28);
}

.btn-primary:hover,
.btn-primary:focus {
  background: linear-gradient(135deg, #ffd95d, #f2aa0c);
  border-color: transparent;
  color: #10233f;
}

.btn-outline-primary,
.btn-outline-secondary,
.btn-outline-dark {
  border-width: 1px;
}

.hero-section,
.course-hero {
  position: relative;
  overflow: hidden;
  border-radius: 1.75rem;
  box-shadow: var(--pyc-shadow);
}

.hero-section {
  background:
    radial-gradient(circle at 15% 20%, rgba(255, 210, 74, 0.26), transparent 20%),
    radial-gradient(circle at 86% 14%, rgba(113, 169, 239, 0.32), transparent 28%),
    radial-gradient(circle at 65% 80%, rgba(47, 111, 182, 0.16), transparent 24%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(243, 248, 255, 0.92));
  border: 1px solid rgba(61, 106, 166, 0.18);
}

.course-hero {
  background:
    radial-gradient(circle at 84% 16%, rgba(255, 210, 74, 0.22), transparent 18%),
    radial-gradient(circle at 12% 78%, rgba(113, 169, 239, 0.16), transparent 20%),
    linear-gradient(135deg, #08162d 0%, #13335f 52%, #173a67 100%);
  color: #fff;
}

.hero-section::before,
.course-hero::before {
  content: "";
  position: absolute;
  inset: auto -4rem -4rem auto;
  width: 15rem;
  height: 15rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  filter: blur(10px);
}

.hero-stat-card,
.hero-stats {
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 1.35rem;
  box-shadow: 0 18px 44px rgba(15, 23, 42, 0.12);
}

.hero-kicker,
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero-kicker {
  background: linear-gradient(135deg, rgba(255, 210, 74, 0.18), rgba(245, 178, 30, 0.14));
  color: #946200;
}

.section-kicker {
  background: linear-gradient(135deg, rgba(113, 169, 239, 0.12), rgba(255, 210, 74, 0.12));
  color: var(--pyc-navy);
}

.course-card {
  overflow: hidden;
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.course-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 55px rgba(15, 23, 42, 0.18);
}

.course-card .card-img-top,
.card-img-top {
  height: 190px;
  object-fit: cover;
}

.course-card .card-body {
  padding: 1.1rem 1.1rem 1.15rem;
}

.course-thumb-placeholder {
  height: 190px;
  background:
    radial-gradient(circle at top left, rgba(255, 210, 74, 0.24), transparent 22%),
    linear-gradient(135deg, rgba(113, 169, 239, 0.24), rgba(47, 111, 182, 0.15)),
    linear-gradient(45deg, #dbeafe, #fef3c7);
  color: #173a67;
  font-weight: 700;
}

.course-free-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 2;
  box-shadow: 0 10px 24px rgba(5, 150, 105, 0.22);
}

.catalog-layout aside .card,
.lesson-sidebar,
.sticky-summary {
  position: sticky;
  top: 6rem;
}

.filters-card .form-label,
.form-label {
  font-weight: 600;
  color: #334155;
}

.form-control,
.form-select {
  border-radius: 0.95rem;
  padding: 0.8rem 0.95rem;
  border-color: rgba(148, 163, 184, 0.3);
  background: rgba(255, 255, 255, 0.9);
}

.form-control:focus,
.form-select:focus {
  border-color: rgba(47, 111, 182, 0.46);
  box-shadow: 0 0 0 0.25rem rgba(113, 169, 239, 0.18);
}

.progress {
  height: 0.8rem;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.18);
}

.progress-bar {
  border-radius: 999px;
  background: linear-gradient(135deg, var(--pyc-blue), var(--pyc-yellow));
}

.accordion-button {
  border-radius: 1rem !important;
  font-weight: 700;
}

.accordion-button:not(.collapsed) {
  background: linear-gradient(135deg, rgba(113, 169, 239, 0.18), rgba(255, 210, 74, 0.12));
  color: var(--pyc-navy);
  box-shadow: none;
}

.curriculum-section-title {
  background: linear-gradient(135deg, var(--pyc-navy-deep), var(--pyc-blue));
  color: #f8fafc;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.85rem 1rem;
}

.lesson-list {
  max-height: 480px;
  overflow: auto;
}

.pythonicos-empty {
  padding: 2rem;
  border: 1px dashed rgba(148, 163, 184, 0.4);
  border-radius: 1.25rem;
  background: rgba(255, 255, 255, 0.55);
  text-align: center;
  color: #64748b;
}

.metric-card {
  height: 100%;
  padding: 1.35rem;
}

.metric-label {
  color: #51627e;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
}

.metric-value {
  font-size: clamp(1.8rem, 2.3vw, 2.6rem);
  line-height: 1;
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-top: 0.4rem;
}

.surface-grid {
  display: grid;
  gap: 1rem;
}

.surface-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.mini-stat {
  padding: 1rem 1.1rem;
  border-radius: 1.1rem;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.86), rgba(249, 251, 255, 0.72));
  border: 1px solid rgba(61, 106, 166, 0.12);
}

.mini-stat strong {
  display: block;
  font-size: 1.1rem;
}

.page-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.page-title-row h1,
.page-title-row h2 {
  margin: 0;
}

.info-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.14), rgba(255, 210, 74, 0.1));
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: inherit;
  font-size: 0.82rem;
  font-weight: 600;
}

.dashboard-course-card .card-body {
  padding: 1.1rem;
}

.dashboard-course-card .status-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(113, 169, 239, 0.16), rgba(255, 210, 74, 0.14));
  color: var(--pyc-navy);
  font-size: 0.78rem;
  font-weight: 700;
}

.btn-outline-primary {
  color: var(--pyc-blue);
  border-color: rgba(47, 111, 182, 0.25);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
  background: linear-gradient(135deg, rgba(113, 169, 239, 0.18), rgba(47, 111, 182, 0.14));
  border-color: transparent;
  color: var(--pyc-navy);
}

.btn-outline-secondary,
.btn-outline-dark {
  color: var(--pyc-navy);
  border-color: rgba(11, 31, 69, 0.14);
}

.btn-outline-secondary:hover,
.btn-outline-dark:hover,
.btn-outline-secondary:focus,
.btn-outline-dark:focus {
  background: linear-gradient(135deg, rgba(255, 210, 74, 0.14), rgba(113, 169, 239, 0.12));
  border-color: transparent;
  color: var(--pyc-navy);
}

.badge.text-bg-success {
  background: linear-gradient(135deg, var(--pyc-yellow), var(--pyc-gold)) !important;
  color: #10233f !important;
}

.badge.text-bg-primary {
  background: linear-gradient(135deg, var(--pyc-blue), var(--pyc-sky)) !important;
}

.quick-links-stack .btn {
  justify-content: flex-start;
  white-space: normal;
}

.table,
.table > :not(caption) > * > * {
  --table-bg: transparent;
}

@media (max-width: 991px) {
  .pythonicos-logo {
    width: 4.6rem;
    height: 4.6rem;
  }

  .pythonicos-brand-title {
    font-size: 0.88rem;
  }

  .pythonicos-search {
    width: 100%;
  }

  .pythonicos-main {
    padding-top: 1.35rem;
  }

  .catalog-layout aside .card,
  .lesson-sidebar,
  .sticky-summary {
    position: static;
  }

  .surface-grid-3 {
    grid-template-columns: 1fr;
  }
}