/* marimo-book workbench — page shell: header controls, update banner, frame,
   history drawer. Colors come from Material's own variables so both palettes
   and a custom theme palette work unchanged. */

.wb-banner[hidden], .wb-toast[hidden], .wb-frame[hidden], #wb-read[hidden],
.wb-history[hidden], .wb-chip[hidden], .wb-hbtn[hidden], .wb-btn[hidden],
.wb-head .wb-seg[hidden] { display: none !important; }

/* Header group: status chip · Read|Run|Edit · History */
.wb-head { display: flex; align-items: center; gap: .45rem; margin-inline: .6rem .2rem; font-size: .68rem; color: inherit; }
.wb-seg { display: inline-flex; border: 1px solid currentColor; border-radius: .25rem; overflow: hidden; opacity: .95; }
.wb-seg-btn {
  appearance: none; border: 0; background: transparent; color: inherit;
  padding: .2rem .55rem; font: inherit; cursor: pointer; border-right: 1px solid currentColor;
}
.wb-seg-btn:last-child { border-right: 0; }
.wb-seg-btn[aria-pressed="true"] { background: var(--md-primary-fg-color); color: var(--md-primary-bg-color); }
.wb-seg-btn:focus-visible, .wb-btn:focus-visible, .wb-hbtn:focus-visible { outline: 2px solid var(--md-accent-fg-color); outline-offset: 2px; }
.wb-chip { white-space: nowrap; opacity: .85; font-variant-numeric: tabular-nums; }
.wb-chip .dot, .wb-hbtn .dot { display: inline-block; width: .45rem; height: .45rem; border-radius: 50%; background: var(--md-accent-fg-color); margin-right: .25rem; vertical-align: middle; }
.wb-hbtn {
  appearance: none; font: inherit; cursor: pointer; padding: .2rem .55rem; line-height: inherit;
  border: 1px solid currentColor; border-radius: .25rem; background: transparent; color: inherit; white-space: nowrap; opacity: .95;
}
@media (max-width: 960px) { .wb-chip, #wb-history-btn { display: none; } }
@media (max-width: 720px) {
  .wb-seg-btn[data-view="run"], .wb-seg-btn[data-view="edit"] { display: none; }
  .wb-head { margin-inline: .3rem; }
}

/* In-article pieces */
.wb-toolbar { display: none; }
.wb-grow { flex: 1; }
.wb-btn {
  appearance: none; font: inherit; cursor: pointer; padding: .3rem .6rem;
  border: 1px solid var(--md-default-fg-color--lighter); border-radius: .25rem;
  background: var(--md-default-bg-color); color: var(--md-default-fg-color);
}
.wb-btn.primary { border-color: var(--md-primary-fg-color); color: var(--md-primary-fg-color); font-weight: 600; }
.wb-btn.danger { color: #b3261e; border-color: #b3261e; }

.wb-banner {
  display: flex; flex-wrap: wrap; align-items: center; gap: .5rem;
  margin: 0 0 1rem; padding: .6rem .8rem; font-size: .72rem;
  border-left: 3px solid var(--md-accent-fg-color); background: var(--md-code-bg-color);
}
.wb-banner p { margin: 0; }

.wb-frame { margin: 0 0 1.5rem; }
.wb-frame iframe {
  width: 100%; height: calc(100vh - 7rem); min-height: 320px;
  border: 1px solid var(--md-default-fg-color--lightest); border-radius: .25rem;
  background: var(--md-default-bg-color);
}
.wb-boot { font-size: .7rem; color: var(--md-default-fg-color--light); margin: .3rem 0 0; }

.wb-toast {
  position: fixed; left: 50%; bottom: 1.2rem; transform: translateX(-50%); z-index: 50;
  padding: .5rem .8rem; font-size: .72rem; border-radius: .25rem;
  background: var(--md-default-fg-color); color: var(--md-default-bg-color);
  display: flex; gap: .6rem; align-items: center; max-width: min(90vw, 40rem);
}
.wb-toast button { font: inherit; color: inherit; background: transparent; border: 1px solid currentColor; border-radius: .2rem; padding: .15rem .5rem; cursor: pointer; }

/* History drawer */
.wb-history {
  position: fixed; top: 0; right: 0; height: 100vh; width: min(460px, 100vw); z-index: 60;
  background: var(--md-default-bg-color); color: var(--md-default-fg-color);
  border-left: 1px solid var(--md-default-fg-color--lightest); box-shadow: -4px 0 16px rgba(0,0,0,.12);
  display: flex; flex-direction: column; font-size: .72rem;
}
.wb-history-head { display: flex; align-items: center; justify-content: space-between; padding: .8rem 1rem; border-bottom: 1px solid var(--md-default-fg-color--lightest); }
.wb-history-save { display: flex; gap: .4rem; padding: .6rem 1rem; border-bottom: 1px solid var(--md-default-fg-color--lightest); }
.wb-history-save input { flex: 1; font: inherit; padding: .3rem .4rem; border: 1px solid var(--md-default-fg-color--lighter); border-radius: .2rem; background: transparent; color: inherit; }
.wb-history-list { list-style: none; margin: 0; padding: .4rem 0; overflow: auto; max-height: 40%; border-bottom: 1px solid var(--md-default-fg-color--lightest); }
.wb-history-list li { display: grid; grid-template-columns: 14px 1fr; gap: .5rem; padding: .35rem 1rem; cursor: pointer; }
.wb-history-list li:hover, .wb-history-list li[aria-selected="true"] { background: var(--md-code-bg-color); }
.wb-history-list .dot { width: 8px; height: 8px; border-radius: 50%; border: 1.5px solid var(--md-primary-fg-color); margin-top: .35rem; }
.wb-history-list .dot.now { background: var(--md-primary-fg-color); }
.wb-history-list small { display: block; color: var(--md-default-fg-color--light); }
.wb-preview { display: flex; flex-direction: column; flex: 1; min-height: 0; }
.wb-preview-head { display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; padding: .5rem 1rem; }
.wb-preview pre { flex: 1; margin: 0; padding: .6rem 1rem; overflow: auto; font-size: .62rem; line-height: 1.5; background: var(--md-code-bg-color); }
.wb-preview pre .add { background: rgba(46,160,67,.25); }
.wb-preview pre .del { background: rgba(248,81,73,.25); text-decoration: line-through; }
.wb-history-foot { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; padding: .6rem 1rem; border-top: 1px solid var(--md-default-fg-color--lightest); }

/* Assignment: the card in the article, and the bottom drawer that hosts the
   assignment's own editor with its own bar. */
.wb-assignment {
  margin-top: 2.5rem; padding: 1rem 1.2rem;
  border: 1px solid var(--md-default-fg-color--lightest); border-radius: .3rem;
  background: var(--md-code-bg-color);
}
.wb-assignment h2 { margin-top: 0; }
.wb-assignment .wb-meta { color: var(--md-default-fg-color--light); font-size: .72rem; margin: -.4rem 0 .6rem; }
.wb-assignment .wb-asg-status { font-size: .72rem; margin: 0 0 .6rem; }
.wb-questions { margin: 0 0 1rem 1rem; font-size: .8rem; }
.wb-asg-actions { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; margin-bottom: .2rem; font-size: .72rem; color: var(--md-default-fg-color--light); }

.wb-frame iframe { height: calc(100vh - 7rem - var(--wb-drawer-reserved, 0px)); }
.wb-asg-frame { flex: 1; min-height: 0; }
.wb-asg-frame iframe { width: 100%; height: 100%; border: 0; background: var(--md-default-bg-color); }

.wb-drawer {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 55;
  height: var(--wb-drawer-h, 55vh);
  display: flex; flex-direction: column;
  background: var(--md-default-bg-color); color: var(--md-default-fg-color);
  border-top: 1px solid var(--md-default-fg-color--lightest);
  box-shadow: 0 -6px 18px rgba(0,0,0,.14);
  font-size: .68rem;
}
.wb-drawer[hidden] { display: none !important; }
.wb-drawer[data-state="min"] { height: auto; }
.wb-drawer[data-state="min"] .wb-asg-frame, .wb-drawer[data-state="min"] .wb-drawer-handle { display: none; }
.wb-drawer.dragging .wb-asg-frame { pointer-events: none; }
.wb-drawer-handle { height: 8px; cursor: ns-resize; background: var(--md-code-bg-color); position: relative; }
.wb-drawer-handle::after { content: ""; position: absolute; left: 50%; top: 2px; width: 44px; height: 4px; margin-left: -22px; border-radius: 2px; background: var(--md-default-fg-color--lighter); }
.wb-drawer-bar {
  display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; padding: .35rem .8rem; min-height: 44px; box-sizing: border-box;
  border-bottom: 1px solid var(--md-default-fg-color--lightest); background: var(--md-code-bg-color);
}
.wb-drawer-bar strong { font-family: var(--md-text-font-family); font-size: .72rem; }
.wb-drawer-bar .wb-meta { color: var(--md-default-fg-color--light); }
.wb-drawer-bar .wb-hbtn { border-color: var(--md-default-fg-color--lighter); }
.wb-drawer-bar .wb-hbtn.ok { border-color: var(--md-accent-fg-color); color: var(--md-accent-fg-color); }