/* Quad-SDK custom theme — CMU Carnegie Red */

:root {
  /* Carnegie Red #C41230 / Iron Gray #6D6E71 — official CMU brand colors */
  --md-primary-fg-color:        #C41230;
  --md-primary-fg-color--light: #D63A52;
  --md-primary-fg-color--dark:  #8E0D22;
  --md-accent-fg-color:         #6D6E71;
  --md-typeset-a-color:         #C41230;

  /* Subtle gradient used in hero text + tab underline */
  --qsdk-gradient: linear-gradient(90deg, #8E0D22 0%, #C41230 50%, #6D6E71 100%);
}

[data-md-color-scheme="slate"] {
  /* Dark mode: keep CMU red — no pink. Slightly lift for link contrast only. */
  --md-default-bg-color: #141414;
  --md-code-bg-color:    #1d1d1d;
  --md-primary-fg-color:        #C41230;
  --md-primary-fg-color--light: #C41230;
  --md-primary-fg-color--dark:  #8E0D22;
  --md-accent-fg-color:         #C41230;
  --md-typeset-a-color:         #D63A52;
}

/* ---------- Layout polish ---------- */

/* Smaller body text — gives heading sizes more punch */
.md-typeset {
  font-size: 0.78rem;       /* default is 0.8rem */
  line-height: 1.65;
}

/* Heading scale — bigger, bolder, with more weight contrast vs body */
.md-typeset h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.6em;
}
.md-typeset h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-top: 2.4rem;
  margin-bottom: 0.7em;
  padding-bottom: 0.35em;
  border-bottom: 1px solid var(--md-default-fg-color--lightest);
}
.md-typeset h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-top: 1.8rem;
  margin-bottom: 0.5em;
  letter-spacing: -0.005em;
}
.md-typeset h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-top: 1.4rem;
  margin-bottom: 0.4em;
  text-transform: none;
}

/* List + paragraph spacing */
.md-typeset p,
.md-typeset li {
  font-size: 0.78rem;
}

/* ---------- Hero on landing page ---------- */

.hero {
  text-align: center;
  padding: 3rem 0 2rem 0;
  position: relative;
}

/* Soft red glow behind hero on landing */
.hero::before {
  content: "";
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 120%;
  background: radial-gradient(ellipse at center,
              rgba(196, 18, 48, 0.10) 0%,
              transparent 60%);
  z-index: -1;
  pointer-events: none;
}

.hero h1 {
  font-size: 3.4rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
  letter-spacing: -0.025em;
  background: var(--qsdk-gradient);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: hero-fade 0.7s ease-out both;
}

.hero p:first-of-type {
  font-size: 1.2rem;
  font-weight: 400;
  max-width: 720px;
  margin: 0 auto 1.6rem auto;
  color: var(--md-default-fg-color--light);
  animation: hero-fade 0.7s 0.1s ease-out both;
}

.hero .md-button {
  margin: 0.3rem 0.3rem 1.6rem 0.3rem;
  animation: hero-fade 0.7s 0.2s ease-out both;
}

.hero .md-button--primary {
  background-color: var(--md-primary-fg-color);
  border-color: var(--md-primary-fg-color);
  box-shadow: 0 4px 14px rgba(196, 18, 48, 0.30);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.hero .md-button--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 22px rgba(196, 18, 48, 0.40);
  background-color: var(--md-primary-fg-color--dark);
  border-color: var(--md-primary-fg-color--dark);
}

.hero-image {
  max-width: min(960px, 100%);
  margin: 1.8rem auto;
  border-radius: 14px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.18);
  display: block;
  animation: hero-fade 0.9s 0.3s ease-out both;
}

[data-md-color-scheme="slate"] .hero-image {
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6);
}

@keyframes hero-fade {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Card grid ---------- */

.md-typeset .grid.cards > :is(ul, ol) > li,
.md-typeset .grid > .card {
  border-radius: 12px;
  border: 1px solid var(--md-default-fg-color--lightest);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.md-typeset .grid.cards > :is(ul, ol) > li:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.10);
  border-color: var(--md-primary-fg-color);
}

[data-md-color-scheme="slate"] .md-typeset .grid.cards > :is(ul, ol) > li:hover {
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.40);
}

/* ---------- Footer credit (custom on home) ---------- */

.footer-credit {
  text-align: center;
  font-size: 0.85rem;
  color: var(--md-default-fg-color--light);
  margin-top: 2rem;
}

/* ---------- Code blocks ---------- */

.md-typeset pre > code,
.md-typeset code {
  font-size: 0.66rem;
  border-radius: 8px;
}

/* BibTeX / citation blocks — long lines, give them tighter line-height too */
.md-typeset .language-bibtex,
.md-typeset code.language-bibtex {
  font-size: 0.60rem;
  line-height: 1.45;
}

/* Inline code — sit slightly inset from body text */
.md-typeset :not(pre) > code {
  padding: 0.05em 0.4em;
}

.md-typeset .highlight + .highlight,
.md-typeset .highlight + p > .highlight {
  margin-top: 0.6rem;
}

/* Filename / language tab on code blocks */
.md-typeset .highlight > .filename {
  background: var(--md-primary-fg-color);
  color: white;
}

/* ---------- Tables ---------- */

.md-typeset table:not([class]) {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.md-typeset table:not([class]) th {
  background: var(--md-primary-fg-color);
  color: white;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.md-typeset table:not([class]) tr:nth-child(2n) {
  background: var(--md-default-fg-color--lightest);
}

[data-md-color-scheme="slate"] .md-typeset table:not([class]) tr:nth-child(2n) {
  background: rgba(255, 255, 255, 0.025);
}

/* ---------- Admonitions ---------- */

.md-typeset .admonition {
  border-radius: 10px;
  border-left-width: 4px;
}

/* ---------- Mermaid ---------- */

.mermaid {
  text-align: center;
  margin: 1.5rem 0;
}

/* ---------- Nav tabs (top bar) ---------- */

.md-tabs {
  background-color: var(--md-primary-fg-color--dark);
}

/* Subtle accent line under the active tab */
.md-tabs__link--active {
  position: relative;
}
.md-tabs__link--active::after {
  content: "";
  position: absolute;
  left: 0.6rem;
  right: 0.6rem;
  bottom: -2px;
  height: 3px;
  background: white;
  border-radius: 2px;
}

/* ---------- Code annotations ---------- */

.md-typeset .md-annotation__index {
  background-color: var(--md-primary-fg-color);
}

/* ---------- Version selector (mike) ---------- */

/* Shrink the dropdown so the version label sits subtle against the title. */
.md-header .md-version,
.md-version {
  font-size: 0.6rem !important;
  opacity: 0.7;
  transition: opacity 0.15s ease;
  margin-left: 0.4rem;
}

.md-header .md-version:hover,
.md-version:hover {
  opacity: 1;
}

.md-version__current {
  font-size: 0.6rem !important;
  font-weight: 400;
  padding: 0.1rem 0.45rem;
  letter-spacing: 0.04em;
  line-height: 1.4;
  text-transform: uppercase;
}

/* Apply the same uppercase + tighter look to entries inside the dropdown */
.md-version__list .md-version__item {
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.62rem;
}

/* Slightly smaller caret */
.md-version__current::after {
  margin-left: 0.25em;
  transform: scale(0.8);
}

/* ---------- Search ---------- */

.md-search__input {
  background-color: rgba(255, 255, 255, 0.15);
}
.md-search__input::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

/* ---------- Pagination buttons (Prev/Next) ---------- */

.md-footer__inner.md-grid {
  background: var(--md-primary-fg-color--dark);
}

/* ---------- TOC active item ---------- */

.md-nav__link--active {
  color: var(--md-primary-fg-color);
  font-weight: 600;
}

/* ---------- Glightbox overrides for clean look ---------- */

.glightbox-clean .gslide-description {
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
}