/* Custom site-wide and hero background textures, sticky header, TOC, and jump-to-top button styles */
html { scroll-behavior: smooth; }
.font-montserrat { font-family: 'Montserrat', 'Inter', sans-serif; }
header#home {
  position: relative;
  background-image:
    url('data:image/svg+xml;utf8,<svg width="64" height="64" viewBox="0 0 64 64" fill="none" xmlns="http://www.w3.org/2000/svg"><g opacity="0.06"><path d="M8 0v64M16 0v64M24 0v64M32 0v64M40 0v64M48 0v64M56 0v64M0 8h64M0 16h64M0 24h64M0 32h64M0 40h64M0 48h64M0 56h64" stroke="%23b6d0f7" stroke-width="0.4"/></g><g opacity="0.13"><path d="M0 0h64v64H0V0M32 0v64M0 32h64" stroke="%23b6d0f7" stroke-width="0.7"/></g><g opacity="0.10"><circle cx="32" cy="32" r="0.7" fill="%23b6d0f7"/><circle cx="0" cy="0" r="0.7" fill="%23b6d0f7"/><circle cx="0" cy="32" r="0.7" fill="%23b6d0f7"/><circle cx="32" cy="0" r="0.7" fill="%23b6d0f7"/><circle cx="32" cy="64" r="0.7" fill="%23b6d0f7"/><circle cx="64" cy="32" r="0.7" fill="%23b6d0f7"/><circle cx="64" cy="0" r="0.7" fill="%23b6d0f7"/><circle cx="0" cy="64" r="0.7" fill="%23b6d0f7"/><circle cx="64" cy="64" r="0.7" fill="%23b6d0f7"/></g></svg>'),
    linear-gradient(to bottom, #1e3a8a 0%, #1e40af99 60%, #0f172a 100%);
  background-size: 64px 64px, cover;
  background-repeat: repeat, no-repeat;
  background-position: top center, center;
  mask-image: linear-gradient(to bottom, black 80%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 80%, transparent 100%);
}
body {
  background-color: #0f172a;
  background-image:
    url('data:image/svg+xml;utf8,<svg width="64" height="64" viewBox="0 0 64 64" fill="none" xmlns="http://www.w3.org/2000/svg"><g opacity="0.025"><path d="M8 0v64M16 0v64M24 0v64M32 0v64M40 0v64M48 0v64M56 0v64M0 8h64M0 16h64M0 24h64M0 32h64M0 40h64M0 48h64M0 56h64" stroke="%23b6d0f7" stroke-width="0.4"/></g><g opacity="0.06"><path d="M0 0h64v64H0V0M32 0v64M0 32h64" stroke="%23b6d0f7" stroke-width="0.7"/></g><g opacity="0.04"><circle cx="32" cy="32" r="0.7" fill="%23b6d0f7"/><circle cx="0" cy="0" r="0.7" fill="%23b6d0f7"/><circle cx="0" cy="32" r="0.7" fill="%23b6d0f7"/><circle cx="32" cy="0" r="0.7" fill="%23b6d0f7"/><circle cx="32" cy="64" r="0.7" fill="%23b6d0f7"/><circle cx="64" cy="32" r="0.7" fill="%23b6d0f7"/><circle cx="64" cy="0" r="0.7" fill="%23b6d0f7"/><circle cx="0" cy="64" r="0.7" fill="%23b6d0f7"/><circle cx="64" cy="64" r="0.7" fill="%23b6d0f7"/></g></svg>');
  background-size: 64px 64px;
  background-repeat: repeat;
  background-attachment: fixed;
  background-position: top center;
}
#sticky-section-header {
  pointer-events: none;
  opacity: 0;
  transform: translateY(-100%);
}
#sticky-section-header.opacity-100 {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
@media (min-width: 1536px) {
  #toc {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    height: auto;
    width: fit-content;
    animation: fade-in-toc 0.7s cubic-bezier(0.4,0,0.2,1);
    background: linear-gradient(120deg, #0f172aee 60%, #1e293bee 100%);
    border-right: 2px solid #33415599;
    box-shadow: none;
    backdrop-filter: blur(8px);
  }
  #toc, #toc * {
    color: #f3f8ff !important;
  }
  @keyframes fade-in-toc {
    from { opacity: 0; transform: translateX(-40px); }
    to { opacity: 1; transform: translateX(0); }
  }
  .toc-link {
    position: relative;
    display: block;
    transition: color 0.2s;
    padding: 0.25rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    z-index: 1;
  }
  .toc-link.toc-active {
    color: #60a5fa !important;
    font-weight: 700;
    background: linear-gradient(90deg, #1e293b 60%, #2563eb22 100%);
    border-radius: 0.5rem;
    background-size: 200% auto;
    animation: toc-gradient-move 2.5s cubic-bezier(0.4,0,0.2,1) infinite;
    z-index: 2;
  }
  .toc-link.toc-active::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 28px;
    border-radius: 6px;
    background: linear-gradient(180deg, #3b82f6 0%, #2563eb 100%);
    box-shadow: 0 0 8px #3b82f6cc;
    transition: all 0.3s;
    z-index: 3;
  }
  .toc-link::after {
    display: none;
  }
  @keyframes toc-gradient-move {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }
  .main-content-wrapper {
    max-width: 1100px;
    margin-left: calc(15rem + 2vw);
    margin-right: auto;
    box-sizing: border-box;
    overflow-x: visible;
  }
  body {
    overflow-x: hidden;
  }
}
@media (max-width: 1535px) {
  .main-content-wrapper {
    margin-left: auto !important;
    margin-right: auto !important;
    max-width: 1100px !important;
    padding-left: 2em !important;
    padding-right: 2em !important;
  }
}
header#home h1,
header#home h2,
header#home p,
header#home nav a {
  text-shadow:
    0 6px 32px rgba(16,32,64,0.55),
    0 2px 8px rgba(30,58,138,0.35),
    0 1px 0 rgba(0,0,0,0.22),
    0 0 2px #fff2;
}
header#home h1 {
  text-shadow:
    0 10px 40px rgba(30,58,138,0.75),
    0 4px 24px rgba(16,32,64,0.55),
    0 2px 8px rgba(0,0,0,0.28),
    0 0 4px #fff4;
}
header#home h2 {
  text-shadow:
    0 6px 24px rgba(30,58,138,0.65),
    0 2px 8px rgba(16,32,64,0.45),
    0 1.5px 6px rgba(0,0,0,0.22),
    0 0 2px #fff3;
}
header#home p {
  text-shadow:
    0 4px 18px rgba(16,32,64,0.45),
    0 1.5px 6px rgba(0,0,0,0.18),
    0 0 1px #fff2;
}
header#home nav a {
  text-shadow:
    0 2px 12px rgba(16,32,64,0.45),
    0 1px 0 rgba(0,0,0,0.18),
    0 0 1px #fff2;
}
#jump-to-top-btn {
  position: fixed;
  bottom: 2.5rem;
  right: 2.5rem;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  background: linear-gradient(135deg, #2563eb 60%, #1e3a8a 100%);
  color: #fff;
  border-radius: 9999px;
  box-shadow: 0 6px 32px rgba(16,32,64,0.25), 0 2px 8px rgba(30,58,138,0.18);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s, transform 0.3s;
  transform: translateY(40px) scale(0.95);
  font-size: 2rem;
  border: none;
  outline: none;
  cursor: pointer;
}
#jump-to-top-btn, #jump-to-top-btn .jump-to-top-label {
  color: #f3f8ff !important;
}
#jump-to-top-btn.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}
#jump-to-top-btn:hover {
  background: linear-gradient(135deg, #1e40af 60%, #2563eb 100%);
  box-shadow: 0 8px 40px #2563eb55, 0 2px 8px #1e3a8a33;
}
#jump-to-top-btn svg {
  width: 1.5em;
  height: 1.5em;
  display: block;
}
@media (max-width: 640px) {
  #jump-to-top-btn {
    bottom: 1.2rem;
    right: 1.2rem;
    width: 2.7rem;
    height: 2.7rem;
    font-size: 1.4rem;
  }
}
.animated-gradient-tagline {
  background: linear-gradient(90deg, #60a5fa 0%, #a78bfa 50%, #f472b6 100%);
  background-size: 200% auto;
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  animation: gradient-move 7s cubic-bezier(0.4,0,0.2,1) infinite;
  font-style: italic;
  font-weight: 500;
}
.animated-gradient {
  background: linear-gradient(90deg, #60a5fa 0%, #a78bfa 50%, #f472b6 100%);
  background-size: 200% auto;
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  animation: gradient-move 7s cubic-bezier(0.4,0,0.2,1) infinite;
  font-weight: 500;
}
header#home nav a.animated-gradient {
  font-style: normal !important;
}
@keyframes gradient-move {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}
/* Light/Dark mode toggle button */
.theme-toggle {
  position: fixed;
  top: 1.2rem;
  right: 1.2rem;
  z-index: 100;
  background: #1e293b;
  color: #fff;
  border: none;
  border-radius: 9999px;
  padding: 0.6em 1.2em;
  font-size: 0.7rem;
  font-weight: 600;
  box-shadow: 0 2px 8px #0002;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.theme-toggle.light {
  background: #f1f5f9;
  color: #1e293b;
}
body.light {
  background-color: #f8fafc;
  color: #1e293b;
  background-image:
    url('data:image/svg+xml;utf8,<svg width="64" height="64" viewBox="0 0 64 64" fill="none" xmlns="http://www.w3.org/2000/svg"><g opacity="0.07"><path d="M8 0v64M16 0v64M24 0v64M32 0v64M40 0v64M48 0v64M56 0v64M0 8h64M0 16h64M0 24h64M0 32h64M0 40h64M0 48h64M0 56h64" stroke="%239ca3af" stroke-width="0.4"/></g><g opacity="0.13"><path d="M0 0h64v64H0V0M32 0v64M0 32h64" stroke="%239ca3af" stroke-width="0.7"/></g><g opacity="0.10"><circle cx="32" cy="32" r="0.7" fill="%239ca3af"/><circle cx="0" cy="0" r="0.7" fill="%239ca3af"/><circle cx="0" cy="32" r="0.7" fill="%239ca3af"/><circle cx="32" cy="0" r="0.7" fill="%239ca3af"/><circle cx="32" cy="64" r="0.7" fill="%239ca3af"/><circle cx="64" cy="32" r="0.7" fill="%239ca3af"/><circle cx="64" cy="0" r="0.7" fill="%239ca3af"/><circle cx="0" cy="64" r="0.7" fill="%239ca3af"/><circle cx="64" cy="64" r="0.7" fill="%239ca3af"/></g></svg>'),
    linear-gradient(180deg, #e0e7ef 0%, #f8fafc 60%, #f8fafc 100%);
  background-size: 64px 64px, cover;
  background-repeat: repeat, no-repeat;
  background-attachment: fixed;
  background-position: top center, center;
}
body.light header#home {
  background-image:
    url('data:image/svg+xml;utf8,<svg width="64" height="64" viewBox="0 0 64 64" fill="none" xmlns="http://www.w3.org/2000/svg"><g opacity="0.09"><path d="M8 0v64M16 0v64M24 0v64M32 0v64M40 0v64M48 0v64M56 0v64M0 8h64M0 16h64M0 24h64M0 32h64M0 40h64M0 48h64M0 56h64" stroke="%239ca3af" stroke-width="0.4"/></g><g opacity="0.18"><path d="M0 0h64v64H0V0M32 0v64M0 32h64" stroke="%239ca3af" stroke-width="0.7"/></g><g opacity="0.13"><circle cx="32" cy="32" r="0.7" fill="%239ca3af"/><circle cx="0" cy="0" r="0.7" fill="%239ca3af"/><circle cx="0" cy="32" r="0.7" fill="%239ca3af"/><circle cx="32" cy="0" r="0.7" fill="%239ca3af"/><circle cx="32" cy="64" r="0.7" fill="%239ca3af"/><circle cx="64" cy="32" r="0.7" fill="%239ca3af"/><circle cx="64" cy="0" r="0.7" fill="%239ca3af"/><circle cx="0" cy="64" r="0.7" fill="%239ca3af"/><circle cx="64" cy="64" r="0.7" fill="%239ca3af"/></g></svg>'),
    linear-gradient(180deg, #b6c3d6 0%, #cbd5e1 30%, #e0e7ef 60%, #f8fafc 100%);
  background-size: 64px 64px, cover;
  background-repeat: no-repeat;
  background-position: top center, center;
  mask-image: linear-gradient(to bottom, black 80%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 80%, transparent 100%);
}
body.light section#contact, body.light .contact-section, body.light footer {
  background: #e0e7ef !important;
  color: #1e293b !important;
  box-shadow: 0 2px 16px #cbd5e1cc;
}
body.light section#contact h2, body.light section#contact h3, body.light section#contact label {
  color: #0f172a !important;
}
body.light section#contact p, body.light section#contact a, body.light section#contact input, body.light section#contact textarea {
  color: #334155 !important;
}
body.light h1, body.light h2, body.light h3, body.light h4, body.light h5, body.light h6 {
  color: #0f172a !important;
}
body.light p, body.light li, body.light span, body.light .prose, body.light .text-gray-400, body.light .text-gray-300 {
  color: #111827 !important;
}
body.light .bg-gray-800 {
  background-color: #e5e7eb !important;
}
body.light .border-gray-700 {
  border-color: #cbd5e1 !important;
}
body.light .text-blue-400 {
  color: #2563eb !important;
}
body.light .text-gray-900 {
  color: #0f172a !important;
}
/* Center the jump-to-top button in the sidebar */
.jump-to-top-btn-toc.sidebar-center {
  margin-top: auto;
  margin-bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  position: static;
  left: unset;
  transform: unset;
}
.jump-to-top-btn-toc.sidebar-center > svg,
.jump-to-top-btn-toc.sidebar-center > span {
  display: block;
  margin-left: auto;
  margin-right: auto;
}