:root {
  --js-yellow: #F7DF1E;
  --ai-blue: #3b82f6;
  --ai-purple: #8b5cf6;
  --ai-pink: #ec4899;
  --gradient-primary: linear-gradient(135deg, var(--ai-blue), var(--ai-purple));
  --gradient-accent: linear-gradient(135deg, var(--ai-purple), var(--ai-pink));
  --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
  --card-radius: 12px;
  --card-shadow: 0 2px 12px rgba(0,0,0,.08);
  --card-shadow-hover: 0 8px 30px rgba(59,130,246,.15);
  --transition-smooth: .25s cubic-bezier(.4,0,.2,1);
}

[data-md-color-scheme="slate"] {
  --card-shadow: 0 2px 12px rgba(0,0,0,.3);
  --card-shadow-hover: 0 8px 30px rgba(139,92,246,.25);
}

/* ---------- Header / Nav Bar ---------- */
.md-header {
  background: var(--gradient-primary) !important;
  box-shadow: 0 2px 20px rgba(59,130,246,.3);
}

.md-tabs {
  background: rgba(15,23,42,.6) !important;
  backdrop-filter: blur(10px);
}

.md-tabs__link {
  font-weight: 600;
  letter-spacing: .02em;
  opacity: .8;
  transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.md-tabs__link:hover,
.md-tabs__link--active {
  opacity: 1;
}

/* ---------- Hero Title (h1) ---------- */
.md-typeset h1 {
  font-weight: 800;
  letter-spacing: -.02em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-md-color-scheme="slate"] .md-typeset h1 {
  background: linear-gradient(135deg, #60a5fa, #c084fc);
  -webkit-background-clip: text;
  background-clip: text;
}

/* ---------- Section Headings ---------- */
.md-typeset h2 {
  font-weight: 700;
  padding-bottom: .4em;
  border-bottom: 3px solid transparent;
  border-image: var(--gradient-primary) 1;
  margin-top: 2em;
}

.md-typeset h3 {
  font-weight: 600;
  color: var(--ai-blue);
}

[data-md-color-scheme="slate"] .md-typeset h3 {
  color: #93c5fd;
}

/* ---------- Links & Buttons ---------- */
.md-typeset a:not(.md-button):not(.md-nav__link):not(.md-header__button):not(.md-tabs__link):not(.md-footer__link):not(.headerlink) {
  color: var(--ai-blue);
  text-decoration: none;
  background-image: linear-gradient(var(--ai-purple), var(--ai-purple));
  background-position: 0% 100%;
  background-repeat: no-repeat;
  background-size: 0% 2px;
  transition: background-size var(--transition-smooth), color var(--transition-smooth);
}

.md-typeset a:not(.md-button):not(.md-nav__link):not(.md-header__button):not(.md-tabs__link):not(.md-footer__link):not(.headerlink):hover {
  color: var(--ai-purple);
  background-size: 100% 2px;
}

/* CTA-style strong links — "Register now!", "Start Quest →" etc. */
.md-typeset a strong,
.md-typeset strong a {
  display: inline-block;
  padding: .5em 1.2em;
  border-radius: 8px;
  background: var(--gradient-primary);
  color: #fff !important;
  -webkit-text-fill-color: #fff;
  font-weight: 700;
  text-decoration: none !important;
  background-size: 100% 100% !important;
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
  box-shadow: 0 2px 10px rgba(59,130,246,.3);
}

.md-typeset a strong:hover,
.md-typeset strong a:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(139,92,246,.4);
}

/* ---------- Admonitions ---------- */
.md-typeset .admonition,
.md-typeset details {
  border-radius: var(--card-radius) !important;
  border-left: 4px solid;
  box-shadow: var(--card-shadow);
  overflow: hidden;
  transition: box-shadow var(--transition-smooth);
}

.md-typeset .admonition:hover,
.md-typeset details:hover {
  box-shadow: var(--card-shadow-hover);
}

.md-typeset .admonition-title,
.md-typeset summary {
  font-weight: 700;
  letter-spacing: .01em;
}

/* Tip — JS yellow accent */
.md-typeset .admonition.tip,
.md-typeset details.tip {
  border-left-color: var(--js-yellow);
}

.md-typeset .tip > .admonition-title,
.md-typeset .tip > summary {
  background-color: rgba(247, 223, 30, .08);
}

/* Info — blue gradient accent */
.md-typeset .admonition.info,
.md-typeset details.info {
  border-left-color: var(--ai-blue);
}

.md-typeset .info > .admonition-title,
.md-typeset .info > summary {
  background-color: rgba(59,130,246,.08);
}

/* Note — purple accent */
.md-typeset .admonition.note,
.md-typeset details.note {
  border-left-color: var(--ai-purple);
}

.md-typeset .note > .admonition-title,
.md-typeset .note > summary {
  background-color: rgba(139,92,246,.08);
}

/* ---------- Tables ---------- */
.md-typeset table:not([class]) {
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  border-collapse: separate;
  border-spacing: 0;
  width: 100%;
}

.md-typeset table:not([class]) th {
  background: var(--gradient-primary);
  color: #fff;
  font-weight: 700;
  letter-spacing: .02em;
  padding: .9em 1em;
  text-align: left;
}

.md-typeset table:not([class]) td {
  padding: .8em 1em;
  border-bottom: 1px solid rgba(139,92,246,.1);
  transition: background-color var(--transition-smooth);
}

.md-typeset table:not([class]) tr:last-child td {
  border-bottom: none;
}

.md-typeset table:not([class]) tbody tr:hover td {
  background-color: rgba(59,130,246,.04);
}

[data-md-color-scheme="slate"] .md-typeset table:not([class]) tbody tr:hover td {
  background-color: rgba(59,130,246,.08);
}

/* ---------- Horizontal Rules ---------- */
.md-typeset hr {
  border: none;
  height: 3px;
  background: var(--gradient-primary);
  border-radius: 2px;
  opacity: .3;
  margin: 2.5em 0;
}

/* ---------- Code Blocks ---------- */
.md-typeset code {
  border-radius: 6px;
  font-size: .85em;
}

.md-typeset pre {
  border-radius: var(--card-radius) !important;
  box-shadow: var(--card-shadow);
}

.md-typeset pre > code {
  border-radius: var(--card-radius) !important;
}

/* ---------- Quest Cards (quests.md) ---------- */
/* Each quest is separated by an hr — style the h2 + content sections */
.md-typeset h2 + p,
.md-typeset h2 + p + p,
.md-typeset h2 + p + p + ul {
  /* ensure content flows well under card-style headings */
}

/* ---------- Content Cards (index.md sections) ---------- */
.md-content__inner {
  max-width: 960px;
}

/* ---------- Footer ---------- */
.md-footer {
  background: var(--gradient-hero) !important;
}

.md-footer-meta {
  background: transparent !important;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--gradient-primary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gradient-accent);
}

/* ---------- Selection ---------- */
::selection {
  background: rgba(139,92,246,.25);
  color: inherit;
}

/* ---------- Smooth Entry Animations ---------- */
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.md-content__inner > * {
  animation: fadeSlideUp .4s ease-out both;
}

.md-content__inner > *:nth-child(1)  { animation-delay: .05s; }
.md-content__inner > *:nth-child(2)  { animation-delay: .1s; }
.md-content__inner > *:nth-child(3)  { animation-delay: .15s; }
.md-content__inner > *:nth-child(4)  { animation-delay: .2s; }
.md-content__inner > *:nth-child(5)  { animation-delay: .25s; }
.md-content__inner > *:nth-child(6)  { animation-delay: .3s; }
.md-content__inner > *:nth-child(7)  { animation-delay: .35s; }

/* ---------- Banner Image ---------- */
.md-typeset img[alt="JavaScript AI Build-a-thon"] {
  border-radius: var(--card-radius);
  box-shadow: 0 4px 30px rgba(59,130,246,.2);
  transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
}

.md-typeset img[alt="JavaScript AI Build-a-thon"]:hover {
  box-shadow: 0 8px 40px rgba(139,92,246,.3);
  transform: scale(1.005);
}

/* ---------- Responsive Tweaks ---------- */
@media (max-width: 768px) {
  .md-typeset h1 {
    font-size: 1.6rem;
  }

  .md-typeset a strong,
  .md-typeset strong a {
    padding: .4em .9em;
    font-size: .9em;
  }
}

/* ---------- Grid Cards (Community section) ---------- */
.grid.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.2em;
  padding: 0;
  margin: 1.5em 0;
  list-style: none;
}

.grid.cards > * {
  border-radius: var(--card-radius);
  border: 1px solid rgba(139,92,246,.15);
  padding: 1.4em;
  box-shadow: var(--card-shadow);
  transition: box-shadow var(--transition-smooth), transform var(--transition-smooth), border-color var(--transition-smooth);
  background: var(--md-default-bg-color);
}

.grid.cards > *:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-3px);
  border-color: rgba(59,130,246,.3);
}

.grid.cards hr {
  margin: .8em 0;
  opacity: .15;
  height: 1px;
  background: var(--gradient-primary);
}

.grid.cards .twemoji,
.grid.cards .fontawesome {
  color: var(--ai-blue);
}

[data-md-color-scheme="slate"] .grid.cards .twemoji,
[data-md-color-scheme="slate"] .grid.cards .fontawesome {
  color: #93c5fd;
}

/* ---------- Quest Cards ---------- */
.quest-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5em;
}

.quest-card {
  border: 1px solid rgba(139,92,246,.12);
  border-left: 5px solid;
  border-image: var(--gradient-primary) 1;
  border-image-slice: 0 0 0 1;
  border-radius: var(--card-radius);
  padding: 1.5em 1.8em;
  box-shadow: var(--card-shadow);
  transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
  background: var(--md-default-bg-color);
  overflow: hidden;
}

.quest-card:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateX(4px);
}

.quest-card h2 {
  margin-top: .2em !important;
  border-bottom: none !important;
  font-size: 1.3em;
}

.quest-card .quest-icon {
  color: var(--ai-blue);
  margin-right: .2em;
}

[data-md-color-scheme="slate"] .quest-card .quest-icon {
  color: #93c5fd;
}

/* Alternate quest card left border colors */
.quest-card:nth-child(1) { border-image: linear-gradient(180deg, #3b82f6, #60a5fa) 1; border-image-slice: 0 0 0 1; }
.quest-card:nth-child(2) { border-image: linear-gradient(180deg, #8b5cf6, #a78bfa) 1; border-image-slice: 0 0 0 1; }
.quest-card:nth-child(3) { border-image: linear-gradient(180deg, #ec4899, #f472b6) 1; border-image-slice: 0 0 0 1; }
.quest-card:nth-child(4) { border-image: linear-gradient(180deg, #f59e0b, #fbbf24) 1; border-image-slice: 0 0 0 1; }
.quest-card:nth-child(5) { border-image: linear-gradient(180deg, #10b981, #34d399) 1; border-image-slice: 0 0 0 1; }