/* ============================================
   QM-OS — Custom Styles
   Deep dark + electric teal + Space Grotesk
   ============================================ */

/* --- Heading font --- */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&display=swap');

/* --- Dark palette --- */
[data-md-color-scheme="slate"] {
  /* Backgrounds */
  --md-default-bg-color: #0d1117;
  --md-default-bg-color--light: rgba(13, 17, 23, 0.7);

  /* Text */
  --md-default-fg-color: rgba(230, 237, 243, 0.9);
  --md-default-fg-color--light: rgba(230, 237, 243, 0.56);
  --md-default-fg-color--lighter: rgba(230, 237, 243, 0.32);
  --md-default-fg-color--lightest: rgba(230, 237, 243, 0.1);

  /* Header + footer */
  --md-primary-fg-color: #080c14;
  --md-primary-bg-color: #e6edf3;
  --md-primary-fg-color--light: #161b22;
  --md-primary-fg-color--dark: #040609;
  --md-footer-bg-color: #080c14;
  --md-footer-fg-color: rgba(230, 237, 243, 0.45);

  /* Accent: electric teal */
  --md-accent-fg-color: #5eead4;
  --md-accent-bg-color: #080c14;
  --md-typeset-a-color: #5eead4;

  /* Code */
  --md-code-bg-color: rgba(110, 118, 129, 0.12);
  --md-code-fg-color: #e6edf3;
  --md-code-hl-color: rgba(94, 234, 212, 0.1);

  /* Custom surface tokens */
  --qm-surface: rgba(94, 234, 212, 0.025);
  --qm-surface-card: #161b22;
  --qm-border: rgba(230, 237, 243, 0.08);
  --qm-border-accent: rgba(94, 234, 212, 0.25);
  --qm-glow-sm: 0 2px 8px rgba(94, 234, 212, 0.06);
  --qm-glow-md: 0 4px 20px rgba(94, 234, 212, 0.1);
}

/* --- Light palette --- */
[data-md-color-scheme="default"] {
  --md-primary-fg-color: #0d1117;
  --md-primary-bg-color: #ffffff;
  --md-accent-fg-color: #0d9488;
  --md-accent-bg-color: #ffffff;
  --md-typeset-a-color: #0d9488;

  --qm-surface: rgba(13, 148, 136, 0.03);
  --qm-surface-card: #f6f8fa;
  --qm-border: rgba(0, 0, 0, 0.08);
  --qm-border-accent: rgba(13, 148, 136, 0.3);
  --qm-glow-sm: 0 2px 8px rgba(13, 148, 136, 0.06);
  --qm-glow-md: 0 4px 20px rgba(13, 148, 136, 0.08);
}

/* --- Typography: Space Grotesk headings --- */
.md-typeset h1,
.md-typeset h2,
.md-typeset h3 {
  font-family: 'Space Grotesk', var(--md-text-font-family), sans-serif;
  letter-spacing: -0.02em;
}

.md-typeset h1 {
  font-weight: 700;
}

.md-typeset h2 {
  font-weight: 600;
}

/* --- Buttons --- */
[data-md-color-scheme="slate"] .md-typeset .md-button:not(.md-button--primary) {
  border-color: var(--qm-border-accent);
  color: var(--md-accent-fg-color);
  transition: all 0.2s ease;
}

[data-md-color-scheme="slate"] .md-typeset .md-button:not(.md-button--primary):hover {
  border-color: var(--md-accent-fg-color);
  background-color: rgba(94, 234, 212, 0.08);
  transform: translateY(-1px);
}

[data-md-color-scheme="slate"] .md-typeset .md-button--primary {
  background-color: var(--md-accent-fg-color);
  border-color: var(--md-accent-fg-color);
  color: #0d1117;
  font-weight: 600;
  transition: all 0.2s ease;
}

[data-md-color-scheme="slate"] .md-typeset .md-button--primary:hover {
  background-color: #2dd4bf;
  border-color: #2dd4bf;
  transform: translateY(-1px);
  box-shadow: var(--qm-glow-md);
}

/* --- Announcement bar --- */
.md-banner {
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}

.md-banner a {
  color: var(--md-accent-fg-color);
}

/* --- Header --- */
.md-header__button.md-logo {
  padding: 0.2rem;
  margin-right: 0.2rem;
}

.md-header__inner {
  padding-left: 0.4rem;
}

.md-header__topic .md-ellipsis {
  cursor: pointer;
}

/* Subtle top glow on page content */
[data-md-color-scheme="slate"] .md-main {
  background: radial-gradient(ellipse 80% 50% at 50% -2%, rgba(94, 234, 212, 0.04) 0%, transparent 100%);
}

/* --- Content width --- */
body[data-md-color-scheme] .md-content {
  max-width: 52rem;
}

/* --- Hero section --- */
.md-typeset .hero-intro {
  margin: 3rem 0 3rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--qm-border);
}

.md-typeset .hero-intro h1 {
  font-size: 3.2rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  margin-bottom: 0.6rem;
  line-height: 1.08;
}

.md-typeset .hero-intro .subtitle {
  font-size: 1.12rem;
  opacity: 0.65;
  margin-bottom: 2rem;
  max-width: 580px;
  line-height: 1.55;
  font-family: 'Inter', var(--md-text-font-family), sans-serif;
}

.md-typeset .hero-intro .md-button {
  font-size: 0.82rem;
  padding: 0.55em 1.5em;
  border-radius: 0.35rem;
}

/* --- Intro note --- */
.md-typeset .intro-note {
  border-left: 3px solid var(--md-accent-fg-color);
  padding: 1rem 1.4rem;
  margin: 0 0 3rem;
  font-size: 0.88rem;
  opacity: 0.8;
  line-height: 1.65;
  background: var(--qm-surface);
  border-radius: 0 0.3rem 0.3rem 0;
}

/* --- Architecture summary diagram --- */
.md-typeset .arch-summary {
  margin: 3rem 0;
  text-align: center;
}

.md-typeset .arch-caption {
  font-size: 0.82rem;
  opacity: 0.5;
  margin-top: 0.5rem;
}

/* --- Section labels --- */
.md-typeset .section-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--md-accent-fg-color);
  opacity: 0.5;
  margin-bottom: 0.2rem;
  font-family: 'Space Grotesk', var(--md-text-font-family), sans-serif;
}

/* --- Feature blocks --- */
.md-typeset .features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
  margin: 1.5rem 0 3.5rem;
}

.md-typeset .feature {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.2rem 1.4rem;
  border-radius: 0.5rem;
  border: 1px solid var(--qm-border);
  background: transparent;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
}

.md-typeset .feature:hover {
  border-color: var(--qm-border-accent);
  box-shadow: var(--qm-glow-sm);
  background: var(--qm-surface);
}

.md-typeset .feature .feature-icon {
  font-size: 1.3rem;
  flex-shrink: 0;
  width: 1.8rem;
  text-align: center;
  padding-top: 0.15rem;
  opacity: 0.9;
}

.md-typeset .feature .feature-text strong {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 0.95rem;
  font-family: 'Space Grotesk', var(--md-text-font-family), sans-serif;
  letter-spacing: -0.01em;
}

.md-typeset .feature .feature-text span {
  font-size: 0.84rem;
  opacity: 0.65;
  line-height: 1.6;
}

/* Novel features: teal left accent */
.md-typeset .features-novel .feature {
  border-left: 3px solid var(--md-accent-fg-color);
  padding-left: 1.2rem;
}

[data-md-color-scheme="slate"] .md-typeset .features-novel .feature {
  background: rgba(94, 234, 212, 0.015);
}

[data-md-color-scheme="slate"] .md-typeset .features-novel .feature:hover {
  background: rgba(94, 234, 212, 0.04);
}

/* Backbone features: 2-column on desktop */
@media screen and (min-width: 768px) {
  .md-typeset .features-backbone {
    grid-template-columns: repeat(2, 1fr);
  }
}

.md-typeset .features-backbone .feature:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

/* --- Timeline --- */
.md-typeset .timeline {
  position: relative;
  padding-left: 1.5rem;
  margin: 1.5rem 0 3.5rem;
  border-left: 2px solid var(--qm-border);
}

.md-typeset .timeline .moment {
  position: relative;
  padding: 0 0 1.8rem 1.5rem;
}

.md-typeset .timeline .moment:last-child {
  padding-bottom: 0;
}

.md-typeset .timeline .moment::before {
  content: "";
  position: absolute;
  left: -1.62rem;
  top: 0.45rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--md-accent-fg-color);
  box-shadow: 0 0 10px rgba(94, 234, 212, 0.5);
}

.md-typeset .timeline .moment .time {
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--md-accent-fg-color);
  display: block;
  margin-bottom: 0.25rem;
  font-family: 'Space Grotesk', var(--md-text-font-family), sans-serif;
  letter-spacing: 0.01em;
}

.md-typeset .timeline .moment p {
  font-size: 0.86rem;
  opacity: 0.7;
  margin: 0;
  line-height: 1.6;
}

/* --- Tables --- */
.md-typeset table:not([class]) {
  font-size: 0.85rem;
  border: 1px solid var(--qm-border);
  border-radius: 0.5rem;
  overflow: hidden;
}

.md-typeset table:not([class]) th {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  opacity: 0.55;
  font-family: 'Space Grotesk', var(--md-text-font-family), sans-serif;
}

.md-typeset table:not([class]) td {
  border-color: var(--qm-border);
}

.md-typeset table:not([class]) tbody tr:hover td {
  background: var(--qm-surface);
}

.md-typeset table:not([class]) td:first-child {
  white-space: nowrap;
}

.md-typeset table:not([class]) td:first-child code {
  color: var(--md-accent-fg-color);
  background: none;
  font-weight: 600;
  font-size: 0.88em;
}

/* --- Demo GIF --- */
.md-typeset .demo-gif {
  margin: 3rem 0;
  text-align: center;
}

.md-typeset .demo-gif img {
  border-radius: 0.6rem;
  max-width: 100%;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--qm-border);
}

.md-typeset .demo-caption {
  font-size: 0.82rem;
  opacity: 0.5;
  margin-bottom: 1rem;
}

.md-typeset .demo-caption code {
  color: var(--md-accent-fg-color);
  background: none;
  font-size: 0.88rem;
}

/* --- CTA bar --- */
.md-typeset .cta-bar {
  border: 1px solid var(--qm-border-accent);
  border-radius: 0.6rem;
  padding: 1.6rem;
  margin: 3.5rem 0 1.5rem;
  text-align: center;
  background: var(--qm-surface);
}

.md-typeset .cta-bar .md-button {
  margin: 0 0.3rem;
}

/* --- Feedback line --- */
.md-typeset .feedback-line {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--qm-border);
  font-size: 0.76rem;
  opacity: 0.35;
  transition: opacity 0.2s;
}

.md-typeset .feedback-line:hover {
  opacity: 0.65;
}

/* --- Card grid --- */
.md-typeset .grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.8rem;
  margin: 1.2rem 0 2rem;
}

.md-typeset .grid .card {
  position: relative;
  border: 1px solid var(--qm-border);
  border-radius: 0.5rem;
  padding: 1.2rem 1.4rem;
  transition: all 0.25s ease;
  cursor: pointer;
}

.md-typeset .grid .card:hover {
  border-color: var(--qm-border-accent);
  transform: translateY(-2px);
  box-shadow: var(--qm-glow-sm);
}

.md-typeset .grid .card > p:last-child a {
  position: static;
}

.md-typeset .grid .card > p:last-child a::after {
  content: "";
  position: absolute;
  inset: 0;
}

.md-typeset .grid .card .card-icon {
  font-size: 1.3rem;
  margin-bottom: 0.4rem;
}

.md-typeset .grid .card h3 {
  margin: 0 0 0.4rem;
  font-size: 0.95rem;
}

.md-typeset .grid .card p {
  font-size: 0.82rem;
  opacity: 0.65;
  margin-bottom: 0.6rem;
  line-height: 1.5;
}

.md-typeset .grid .card a {
  font-size: 0.82rem;
  font-weight: 600;
}

/* --- Badge --- */
.md-typeset .badge {
  display: inline-block;
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.15em 0.5em;
  border-radius: 0.2rem;
  background: var(--md-accent-fg-color);
  color: #0d1117;
  vertical-align: middle;
  margin-left: 0.5rem;
  font-family: 'Space Grotesk', var(--md-text-font-family), sans-serif;
}

/* --- Path selector cards --- */
.md-typeset .path-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.5rem 0 2.5rem;
}

.md-typeset .path-cards .path-card {
  border: 1px solid var(--qm-border);
  border-radius: 0.5rem;
  padding: 1.3rem 1.4rem;
  transition: all 0.25s ease;
  cursor: pointer;
  position: relative;
}

.md-typeset .path-cards .path-card:hover {
  border-color: var(--qm-border-accent);
  transform: translateY(-2px);
  box-shadow: var(--qm-glow-sm);
}

.md-typeset .path-cards .path-card .path-icon {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.md-typeset .path-cards .path-card h3 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
}

.md-typeset .path-cards .path-card p {
  font-size: 0.82rem;
  opacity: 0.65;
  margin-bottom: 0.6rem;
  line-height: 1.5;
}

.md-typeset .path-cards .path-card a {
  font-size: 0.82rem;
  font-weight: 600;
}

.md-typeset .path-cards .path-card a::after {
  content: "";
  position: absolute;
  inset: 0;
}

/* --- Admonitions: teal-themed --- */
[data-md-color-scheme="slate"] .md-typeset .admonition.tip,
[data-md-color-scheme="slate"] .md-typeset details.tip {
  border-color: var(--qm-border-accent);
  background: rgba(94, 234, 212, 0.02);
}

[data-md-color-scheme="slate"] .md-typeset .admonition.tip > .admonition-title,
[data-md-color-scheme="slate"] .md-typeset details.tip > summary {
  background-color: rgba(94, 234, 212, 0.06);
}

[data-md-color-scheme="slate"] .md-typeset .admonition.abstract,
[data-md-color-scheme="slate"] .md-typeset details.abstract {
  border-color: var(--qm-border-accent);
  background: rgba(94, 234, 212, 0.02);
}

[data-md-color-scheme="slate"] .md-typeset .admonition.abstract > .admonition-title,
[data-md-color-scheme="slate"] .md-typeset details.abstract > summary {
  background-color: rgba(94, 234, 212, 0.06);
}

/* --- Search bar --- */
[data-md-color-scheme="slate"] .md-search__form {
  background-color: rgba(230, 237, 243, 0.06);
}

/* --- Sidebar nav refinement --- */
[data-md-color-scheme="slate"] .md-nav__link:hover {
  color: var(--md-accent-fg-color);
}

/* --- Responsive --- */
@media screen and (max-width: 768px) {
  .md-typeset .features-backbone {
    grid-template-columns: 1fr;
  }
}

@media screen and (max-width: 600px) {
  .md-typeset .hero-intro h1 {
    font-size: 2.1rem;
  }
  .md-typeset .hero-intro .subtitle {
    font-size: 1rem;
  }
  .md-typeset .feature {
    flex-direction: column;
    gap: 0.4rem;
  }
  .md-typeset .grid {
    grid-template-columns: 1fr;
  }
  .md-typeset .path-cards {
    grid-template-columns: 1fr;
  }
}