html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

html {
  position: relative;
  min-height: 100%;
}

body {
  min-height: 100vh;
  background-color: var(--surface-bg);
  color: var(--text-color);
  transition: background-color 0.25s ease, color 0.25s ease;
}

:root {
  --surface-bg: #f6f7fb;
  --surface-card: #ffffff;
  --surface-muted: #f1f3f5;
  --text-color: #212529;
  --link-color: #1d4ed8;
  --nav-bg: rgba(255, 255, 255, 0.9);
  --nav-border: rgba(0, 0, 0, 0.06);
}

body.dark-mode {
  --surface-bg: #111827;
  --surface-card: #1f2937;
  --surface-muted: #273445;
  --text-color: #e5e7eb;
  --link-color: #93c5fd;
  --nav-bg: rgba(17, 24, 39, 0.94);
  --nav-border: rgba(255, 255, 255, 0.08);
}

.modern-nav {
  backdrop-filter: blur(8px);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
}

.modern-nav .navbar-brand {
  letter-spacing: 0.04em;
}

.modern-nav .nav-link {
  color: var(--text-color);
  font-weight: 500;
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
}

.modern-nav .nav-link:hover,
.modern-nav .nav-link:focus,
.modern-nav .nav-link.active {
  background-color: var(--surface-muted);
  color: var(--text-color);
}

.bg-light {
  background-color: var(--surface-muted) !important;
}

.text-secondary,
.text-muted,
.footer.text-muted {
  color: color-mix(in srgb, var(--text-color) 72%, transparent) !important;
}

.footer {
  background-color: var(--surface-card);
  margin-top: auto;
}

.page-hero {
  background-image: url('/static/images/light_texture2224.png');
  background-size: cover;
  background-position: center;
  border-radius: 0.75rem;
  padding: clamp(1.25rem, 3vw, 2.5rem);
}

.page-title {
  margin: 0;
  font-weight: 700;
  font-size: clamp(1.6rem, 4.5vw, 2.5rem);
  line-height: 1.2;
  text-wrap: balance;
}

.content-block {
  padding: 1rem;
  border-radius: 0.75rem;
}

a {
  color: var(--link-color);
}

.form-control,
.form-select,
textarea {
  background-color: var(--surface-card);
  color: var(--text-color);
  border-color: color-mix(in srgb, var(--text-color) 20%, transparent);
}

.form-control:focus,
.form-select:focus,
textarea:focus {
  background-color: var(--surface-card);
  color: var(--text-color);
}

.section-transition {
  opacity: 0;
  transform: translateY(18px) scale(0.995);
  transition: opacity 0.55s ease, transform 0.55s ease;
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.section-transition.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

@media (prefers-reduced-motion: reduce) {
  .section-transition {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

@media (max-width: 991.98px) {
  .modern-nav .navbar-nav {
    margin: 0.75rem 0;
  }

  .modern-nav .nav-link {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }

  .modern-nav #themeToggle {
    width: 100%;
  }
}

@media (max-width: 767.98px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .content-block {
    padding: 0.875rem;
  }
}