:root {
  --ink: #2c3e50; /* deep header */
  --bg: #f8f4ef; /* paper */
  --flag-blue: #002395;
  --flag-white: #ffffff;
  --flag-red: #ed2939;
  --line: #ecf0f1; /* light line */
  --txt-muted: #555;
  --b-blue: #3498db;
  --b-red: #e74c3c;
  --b-violet: #9b59b6;
  --b-orange: #f39c12;
  --b-teal: #1abc9c;
  --b-pumpkin: #e67e22;
  --b-crimson: #c0392b;
  --b-green: #27ae60;
  --b-yellow: #f1c40f;
  --b-pink: #e91e63;
  --b-indigo: #5e35b1;
  --b-cyan: #00bcd4;
  --b-lime: #8bc34a;
  --b-amber: #ff9800;
}

html {
  scroll-behavior: smooth;
}
body {
  background: var(--bg);
  color: var(--ink);
  position: relative;
}

/* Header bar mimicking the SVG */
.hero {
  position: relative;
  background: var(--ink);
  min-height: 180px;
  padding: 2.25rem 1rem 2.75rem;
  overflow: hidden;
}
.hero .flag {
  position: absolute;
  inset: 0 auto auto 0;
  width: 30px;
  height: 180px;
  display: flex;
  flex-direction: row;
}
.hero .flag span {
  display: block;
  width: 10px;
}
.hero .flag .b {
  background: var(--flag-blue);
}
.hero .flag .w {
  background: var(--flag-white);
}
.hero .flag .r {
  background: var(--flag-red);
}

.hero h1 {
  font-family: Georgia, serif;
  font-weight: 700;
  color: #fff;
  text-align: center;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
}
.hero p.sub {
  font-family: Georgia, serif;
  font-style: italic;
  color: #ecf0f1;
  text-align: center;
  margin: 0.25rem 0 1rem;
  font-size: clamp(1rem, 2vw, 1.35rem);
}
.hero .divider {
  height: 2px;
  background: var(--line);
  width: min(560px, 90%);
  margin: 0 auto;
  opacity: 0.95;
}

/* Layout */
/* Sidebar: vertical scroll */
.sidebar {
  position: sticky;
  top: 1rem;
  max-height: 80vh; /* keeps it within the viewport height */
  overflow-y: auto; /* enables vertical scrolling */
  scrollbar-width: thin; /* Firefox: slimmer scrollbar */
  scrollbar-color: #bbb #f8f4ef; /* Firefox: thumb + track color */
}

/* Chrome, Edge, Safari scrollbar styling */
.sidebar::-webkit-scrollbar {
  width: 8px;
}
.sidebar::-webkit-scrollbar-track {
  background: #f8f4ef;
  border-radius: 10px;
}
.sidebar::-webkit-scrollbar-thumb {
  background-color: #bbb;
  border-radius: 10px;
  border: 2px solid #f8f4ef;
}
.sidebar::-webkit-scrollbar-thumb:hover {
  background-color: #999;
}
.col-md-6[id] {
  scroll-margin-top: 150px; /* keep anchor targets visible below the header */
}
.sidebar .list-group-item {
  border: none;
  background: transparent;
  color: var(--ink);
  padding: 0.5rem 0.25rem;
  transition:
    color 0.2s ease,
    font-weight 0.2s ease;
}
.sidebar .list-group-item:focus,
.sidebar .list-group-item:focus-visible {
  color: #0d6efd;
  font-weight: 700;
  outline: none;
}
.sidebar .list-group-item:focus {
  text-decoration: none;
}

/* Card styling inspired by the SVG rectangles */
.fx-card {
  position: relative;
  border-width: 3px !important;
  border-radius: 10px;
  background: #fff;
  height: 100%;
}
.fx-card .emoji-dot {
  position: absolute;
  top: -14px;
  left: 18px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 18px;
  line-height: 1;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
}
.fx-card .emoji-dot i {
  font-size: 18px;
}
.fx-card .card-title {
  font-weight: 700;
  color: var(--ink);
  font-size: 1.35rem;
  margin-left: 2.4rem;
}
.fx-card .list {
  color: var(--txt-muted);
  font-size: 0.975rem;
}
.fx-card .list li {
  margin: 0.35rem 0;
}

/* Border color helpers + matching emoji-dot bg */
/* Border color helpers + matching emoji-dot bg */
.b-blue {
  border-color: var(--b-blue) !important;
}
.b-red {
  border-color: var(--b-red) !important;
}
.b-violet {
  border-color: var(--b-violet) !important;
}
.b-orange {
  border-color: var(--b-orange) !important;
}
.b-teal {
  border-color: var(--b-teal) !important;
}
.b-pumpkin {
  border-color: var(--b-pumpkin) !important;
}
.b-crimson {
  border-color: var(--b-crimson) !important;
}
.b-green {
  border-color: var(--b-green) !important;
}
.b-yellow {
  border-color: var(--b-yellow) !important;
}
.b-pink {
  border-color: var(--b-pink) !important;
}
.b-indigo {
  border-color: var(--b-indigo) !important;
}
.b-cyan {
  border-color: var(--b-cyan) !important;
}
.b-lime {
  border-color: var(--b-lime) !important;
}
.b-amber {
  border-color: var(--b-amber) !important;
}

.dot-blue {
  background: var(--b-blue);
}
.dot-red {
  background: var(--b-red);
}
.dot-violet {
  background: var(--b-violet);
}
.dot-orange {
  background: var(--b-orange);
}
.dot-teal {
  background: var(--b-teal);
}
.dot-pumpkin {
  background: var(--b-pumpkin);
}
.dot-crimson {
  background: var(--b-crimson);
}
.dot-green {
  background: var(--b-green);
}
.dot-yellow {
  background: var(--b-yellow);
}
.dot-pink {
  background: var(--b-pink);
}
.dot-indigo {
  background: var(--b-indigo);
}
.dot-cyan {
  background: var(--b-cyan);
}
.dot-lime {
  background: var(--b-lime);
}
.dot-amber {
  background: var(--b-amber);
}

/* Footer bar */
.footer-band {
  background: #ecf0f1;
  padding: 1.1rem 0 1.4rem;
}
.footer-band p {
  margin: 0;
  text-align: center;
}
.footer-band .line1 {
  font-style: italic;
  color: #7f8c8d;
  font-family: Georgia, serif;
}
.footer-band .line2 {
  color: #95a5a6;
  font-size: 0.95rem;
}

/* Niceties */
.card-body {
  padding: 1.25rem 1.25rem 1.1rem 1.25rem;
}
.fx-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.06);
  transition: 0.3s ease;
}

@media (max-width: 575.98px) {
  .fx-card .card-title {
    margin-left: 2.1rem;
  }
}