:root {
  --brand: #0d6efd;
  /* Bootstrap primary */
  --brand-dark: #0b5ed7;
  /* darker primary */
  --bg: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --card: #ffffff;
  --card-border: #e5e7eb;
}

html[data-bs-theme="dark"] {
  --bg: #0b1210;
  --text: #f3f4f6;
  --muted: #9ca3af;
  --card: #101a17;
  --card-border: #1f2a26;
}

body {
  background: var(--bg);
  color: var(--text);
}

.navbar-sticky {
  position: sticky;
  top: 0;
  z-index: 1030;
}

.nav-item {
  font-weight: 600;
  letter-spacing: 2px;
}

.hero {
  /* 0d6efd rgba with subtle fade */
  background: linear-gradient(180deg, rgba(13, 110, 253, 0.06), rgba(13, 110, 253, 0));
}

.hero .btn-brand {
  background: var(--brand);
  color: #fff;
}

.btn-brand:hover {
  background: var(--brand-dark);
  color: #fff;
}

.card {
  border-color: var(--card-border);
  background: var(--card);
  transition: transform .2s ease, box-shadow .2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.08);
}

.icon-circle {
  /* blue-tinted circle and icon color */
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(13, 110, 253, 0.12);
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.result-card {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity .25s ease, transform .25s ease;
}

.result-card.show {
  opacity: 1;
  transform: translateY(0);
}

.form-label .fa-solid,
.form-label .fa-regular {
  color: var(--brand);
}

a.text-success {
  text-decoration: none;
}

.share-buttons .btn {
  min-width: 40px;
}

.related-tools a {
  text-decoration: none;
}


/* ---------------- HEADER ---------------- */
header.navbar {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Brand */
header.navbar .navbar-brand {
  font-size: 1.25rem;
  font-weight: 600;
  transition: color 0.3s ease;
}

/* Links */
header.navbar .nav-link {
  font-weight: 500;
  transition: color 0.3s ease;
}

/* Mode toggle */
#darkModeToggle {
  border-radius: 30px;
  padding: 0.35rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* ------- LIGHT MODE ------- */
body.light-mode header.navbar {
  background-color: #ffffff !important;
  border-bottom: 1px solid #dee2e6 !important;
}

body.light-mode header.navbar .navbar-brand {
  color: #0d6efd !important;
}

body.light-mode header.navbar .nav-link {
  color: #212529 !important;
}

body.light-mode header.navbar .nav-link:hover {
  color: #0d6efd !important;
}

body.light-mode #darkModeToggle {
  background-color: #f8f9fa !important;
  border: 1px solid #dee2e6 !important;
  color: #212529 !important;
}

body.light-mode #darkModeToggle:hover {
  background-color: #e9ecef !important;
}

/* ------- DARK MODE ------- */

[data-bs-theme="dark"] header.navbar {
  background-color: #121212 !important;
  border-bottom: 1px solid #2c2c2c !important;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.6) !important;
}

[data-bs-theme="dark"] header.navbar .navbar-brand {
  color: #0d6efd !important;
  /* neon green */
}

[data-bs-theme="dark"] header.navbar .navbar-nav .nav-link {
  color: #e0e0e0 !important;
}

[data-bs-theme="dark"] header.navbar .navbar-nav .nav-link:hover {
  color: #0d6efd !important;
}

[data-bs-theme="dark"] header.navbar .navbar-toggler {
  border-color: #e0e0e0 !important;
}

[data-bs-theme="dark"] header.navbar .navbar-toggler-icon {
  filter: invert(1) !important;
  /* makes hamburger white */
}

[data-bs-theme="dark"] header.navbar #darkModeToggle {
  border-color: #0d6efd !important;
  color: #0d6efd !important;
}

[data-bs-theme="dark"] header.navbar #darkModeToggle:hover {
  background-color: #0d6efd !important;
  color: #121212 !important;
}



/* ---------------- FOOTER ---------------- */
.site-footer {
  transition: background-color 0.3s ease, color 0.3s ease;
}

.footer-link {
  text-decoration: none;
}

/* Light Mode */
body.light-mode .site-footer {
  background-color: #f8f9fa;
  color: #212529;
}

body.light-mode .site-footer .footer-text {
  color: #6c757d;
}

body.light-mode .site-footer .footer-link,
body.light-mode .site-footer .footer-icon {
  color: #212529;
}

body.light-mode .site-footer .footer-link:hover,
body.light-mode .site-footer .footer-icon:hover {
  color: #0d6efd;
}

body.light-mode .site-footer .footer-divider {
  border-color: #dee2e6;
}

/* Dark Mode */
body.dark-mode .site-footer {
  background-color: #212529;
  color: #f8f9fa;
}

body.dark-mode .site-footer .footer-text {
  color: #adb5bd;
}

body.dark-mode .site-footer .footer-link,
body.dark-mode .site-footer .footer-icon {
  color: #f8f9fa;
}

body.dark-mode .site-footer .footer-link:hover,
body.dark-mode .site-footer .footer-icon:hover {
  color: #0d6efd;
}

body.dark-mode .site-footer .footer-divider {
  border-color: #495057;
}


/* ---------------- RESPONSIVE MEDIA QUERIES ---------------- */
@media (max-width: 991px) {

  /* Navbar links spacing */
  header.navbar .nav-link {
    padding: 0.5rem 0;
    text-align: center;
  }

  /* Mode toggle full-width on mobile */
  #darkModeToggle {
    width: 100%;
    margin-top: 0.5rem;
  }

  /* Footer stacks neatly */
  .site-footer .row {
    text-align: center;
  }

  .site-footer .d-flex {
    justify-content: center !important;
  }
}

@media (max-width: 575px) {
  header.navbar .navbar-brand {
    font-size: 1rem;
  }

  .site-footer h5,
  .site-footer h6 {
    font-size: 1rem;
  }
}