/* Fixed bottom shell panel — blog page only */

.shell-dock {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1030;
  background: #f8f9fa;
  border-top: 1px solid #ced4da;
  box-shadow: 0 -6px 20px rgba(0, 0, 0, 0.12);
  transition: height 0.25s ease;
}

.shell-dock--collapsed {
  height: 3rem;
}

.shell-dock--open {
  height: min(45vh, 520px);
}

.shell-dock-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 3rem;
  padding: 0 1rem;
  box-sizing: border-box;
  cursor: pointer;
  user-select: none;
}

.shell-dock-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0;
}

.shell-dock-hint {
  font-size: 0.8rem;
  color: #6c757d;
  margin: 0;
}

.shell-dock-toggle {
  flex-shrink: 0;
  border: 1px solid #6c757d;
  border-radius: 0.35rem;
  background: #fff;
  color: #212529;
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  cursor: pointer;
}

.shell-dock-toggle:hover {
  background: #e9ecef;
}

.shell-dock-body {
  position: relative;
  height: calc(100% - 3rem);
  display: none;
}

.shell-dock--open .shell-dock-body {
  display: block;
}

.shell-dock-status {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #1e1e1e;
  color: #ced4da;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.85rem;
  z-index: 1;
}

.shell-dock-body.is-ready .shell-dock-status {
  display: none;
}

.shell-dock-body iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  background: #1e1e1e;
}

body.shell-dock-open {
  padding-bottom: min(45vh, 520px);
}

.shell-dock-open-btn {
  display: inline-block;
  margin: 0.5rem 0 0;
  border: 1px solid #6c757d;
  border-radius: 0.35rem;
  background: #f8f9fa;
  color: #212529;
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  cursor: pointer;
}

.shell-dock-open-btn:hover {
  background: #e9ecef;
}

body.quarto-dark .shell-dock {
  background: #212529;
  border-top-color: #495057;
}

body.quarto-dark .shell-dock-hint {
  color: #adb5bd;
}

body.quarto-dark .shell-dock-toggle,
body.quarto-dark .shell-dock-open-btn {
  background: #2b3035;
  border-color: #495057;
  color: #f8f9fa;
}

body.quarto-dark .shell-dock-toggle:hover,
body.quarto-dark .shell-dock-open-btn:hover {
  background: #343a40;
}

@media (max-width: 768px) {
  .shell-dock-hint {
    display: none;
  }

  .shell-dock--open {
    height: 55vh;
  }

  body.shell-dock-open {
    padding-bottom: 55vh;
  }
}

/* ------------------------------------------------------------------ */
/* Shell tutorial — glass section headings (page with #shell-dock only) */
/* ------------------------------------------------------------------ */

body:has(#shell-dock) {
  --shell-glass-accent: #20c997;
  --shell-glass-accent-soft: rgba(32, 201, 151, 0.45);
  --shell-glass-accent-glow: rgba(45, 212, 168, 0.35);
  --shell-glass-border: rgba(32, 201, 151, 0.32);
  --shell-glass-bg-top: rgba(255, 255, 255, 0.78);
  --shell-glass-bg-mid: rgba(236, 255, 250, 0.58);
  --shell-glass-bg-bot: rgba(255, 255, 255, 0.68);
  --shell-glass-inset: rgba(255, 255, 255, 0.92);
  --shell-glass-shadow: rgba(32, 201, 151, 0.14);
}

body.quarto-dark:has(#shell-dock) {
  --shell-glass-accent: #2dd4a8;
  --shell-glass-accent-soft: rgba(45, 212, 168, 0.55);
  --shell-glass-accent-glow: rgba(45, 212, 168, 0.45);
  --shell-glass-border: rgba(45, 212, 168, 0.28);
  --shell-glass-bg-top: rgba(33, 37, 41, 0.72);
  --shell-glass-bg-mid: rgba(26, 46, 40, 0.55);
  --shell-glass-bg-bot: rgba(33, 37, 41, 0.68);
  --shell-glass-inset: rgba(255, 255, 255, 0.06);
  --shell-glass-shadow: rgba(0, 0, 0, 0.35);
}

body:has(#shell-dock) main#quarto-document-content section.level2:not(:first-of-type)::before {
  content: "";
  display: block;
  height: 2.25rem;
  margin: 0.5rem auto 1.35rem;
  max-width: min(480px, 78%);
  background:
    radial-gradient(
      circle at center 1.1rem,
      var(--shell-glass-accent) 2.5px,
      transparent 2.5px
    ),
    linear-gradient(
      90deg,
      transparent 0%,
      var(--shell-glass-accent-soft) 18%,
      var(--shell-glass-accent) 50%,
      var(--shell-glass-accent-soft) 82%,
      transparent 100%
    )
    center 1.1rem / 100% 1px no-repeat;
  filter: drop-shadow(0 0 6px var(--shell-glass-accent-glow));
  opacity: 0.9;
}

body:has(#shell-dock) main#quarto-document-content section.level2:not(:first-of-type) {
  margin-top: 0.25rem;
  padding-top: 0.15rem;
}

body:has(#shell-dock) main#quarto-document-content section.level2 > h2 {
  position: relative;
  margin: 0 0 1.35rem;
  padding: 0.95rem 1.35rem 1rem 1.45rem;
  border-radius: 0.7rem;
  border: 1px solid var(--shell-glass-border);
  border-left: 4px solid var(--shell-glass-accent);
  background: linear-gradient(
    135deg,
    var(--shell-glass-bg-top) 0%,
    var(--shell-glass-bg-mid) 48%,
    var(--shell-glass-bg-bot) 100%
  );
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  box-shadow:
    0 8px 32px var(--shell-glass-shadow),
    0 1px 0 var(--shell-glass-inset) inset,
    0 0 0 1px rgba(255, 255, 255, 0.35) inset;
  transition:
    box-shadow 0.25s ease,
    border-color 0.25s ease;
}

body:has(#shell-dock) main#quarto-document-content section.level2 > h2:hover {
  border-color: var(--shell-glass-accent-soft);
  box-shadow:
    0 10px 36px var(--shell-glass-shadow),
    0 0 24px var(--shell-glass-accent-glow),
    0 1px 0 var(--shell-glass-inset) inset;
}

body:has(#shell-dock) main#quarto-document-content section.level2 > h2::after {
  content: "";
  position: absolute;
  top: 0;
  left: 1rem;
  right: 1rem;
  height: 1px;
  border-radius: 999px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.75) 35%,
    rgba(255, 255, 255, 0.75) 65%,
    transparent
  );
  pointer-events: none;
}

body.quarto-dark:has(#shell-dock) main#quarto-document-content section.level2 > h2::after {
  background: linear-gradient(
    90deg,
    transparent,
    rgba(45, 212, 168, 0.35) 35%,
    rgba(45, 212, 168, 0.35) 65%,
    transparent
  );
}

@media (max-width: 768px) {
  body:has(#shell-dock) main#quarto-document-content section.level2 > h2 {
    padding: 0.85rem 1rem 0.9rem 1.1rem;
    font-size: 1.35rem;
  }

  body:has(#shell-dock) main#quarto-document-content section.level2:not(:first-of-type)::before {
    max-width: 88%;
    margin-bottom: 1.1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  body:has(#shell-dock) main#quarto-document-content section.level2 > h2 {
    transition: none;
  }
}