/* Global Learning Hub Floating Bar & Search Modal — Giấy dó & Lò đêm */
:root {
  --hub-bg: rgba(251, 249, 244, 0.94);
  --hub-surface: #F4F0E7;
  --hub-ink: #26231E;
  --hub-muted: #6E675C;
  --hub-accent: #B23B26;
  --hub-jade: #0E7F66;
  --hub-gold: #8A6D25;
  --hub-line: #D8CFC0;
  --hub-shadow: 0 8px 28px rgba(38, 35, 30, 0.16);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --hub-bg: rgba(26, 23, 18, 0.94);
    --hub-surface: #252019;
    --hub-ink: #EDE6D8;
    --hub-muted: #A79C8A;
    --hub-accent: #E06A4C;
    --hub-jade: #2AA07E;
    --hub-gold: #C9A44E;
    --hub-line: #3D3529;
    --hub-shadow: 0 10px 32px rgba(0, 0, 0, 0.55);
  }
}
:root[data-theme="dark"] {
  --hub-bg: rgba(26, 23, 18, 0.94);
  --hub-surface: #252019;
  --hub-ink: #EDE6D8;
  --hub-muted: #A79C8A;
  --hub-accent: #E06A4C;
  --hub-jade: #2AA07E;
  --hub-gold: #C9A44E;
  --hub-line: #3D3529;
  --hub-shadow: 0 10px 32px rgba(0, 0, 0, 0.55);
}

.mlai-hub-dock {
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 9990;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--hub-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--hub-line);
  box-shadow: var(--hub-shadow);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 12.5px;
  color: var(--hub-ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.mlai-hub-dock a,
.mlai-hub-dock button {
  all: unset;
  box-sizing: border-box;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  border-radius: 999px;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  color: var(--hub-ink);
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
}
.mlai-hub-dock a:hover,
.mlai-hub-dock button:hover {
  background: var(--hub-surface);
  color: var(--hub-accent);
}
.mlai-hub-dock .hub-home-btn {
  background: var(--hub-accent);
  color: #fff !important;
}
.mlai-hub-dock .hub-home-btn:hover {
  background: #962f1c;
  color: #fff !important;
}
.mlai-hub-dock .hub-done-btn[data-done="true"] {
  background: rgba(14, 127, 102, 0.16);
  color: var(--hub-jade);
  border: 1px solid var(--hub-jade);
}
.mlai-hub-dock kbd {
  font-family: Consolas, monospace;
  font-size: 10.5px;
  padding: 1px 5px;
  border-radius: 4px;
  border: 1px solid var(--hub-line);
  background: var(--hub-surface);
  color: var(--hub-muted);
}

/* Modal */
.mlai-hub-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(15, 13, 10, 0.58);
  backdrop-filter: blur(4px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 6vh 16px 20px;
}
.mlai-hub-modal-backdrop.open {
  display: flex;
}
.mlai-hub-modal {
  width: 100%;
  max-width: 680px;
  max-height: 82vh;
  display: flex;
  flex-direction: column;
  border-radius: 14px;
  background: var(--hub-bg);
  border: 1.5px solid var(--hub-line);
  box-shadow: var(--hub-shadow);
  color: var(--hub-ink);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  overflow: hidden;
}
.mlai-hub-modal-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--hub-line);
  background: var(--hub-surface);
}
.mlai-hub-modal-head input {
  flex: 1;
  border: 1px solid var(--hub-line);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 14px;
  background: var(--hub-bg);
  color: var(--hub-ink);
  outline: none;
}
.mlai-hub-modal-head input:focus {
  border-color: var(--hub-accent);
}
.mlai-hub-modal-close {
  all: unset;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--hub-muted);
}
.mlai-hub-modal-close:hover {
  color: var(--hub-accent);
}
.mlai-hub-modal-body {
  padding: 12px 16px 18px;
  overflow-y: auto;
}
.mlai-hub-book-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hub-line);
}
.mlai-hub-book-pill {
  text-decoration: none;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--hub-line);
  background: var(--hub-surface);
  color: var(--hub-ink);
}
.mlai-hub-book-pill:hover,
.mlai-hub-book-pill.current {
  border-color: var(--hub-accent);
  color: var(--hub-accent);
}
.mlai-hub-res-item {
  display: block;
  text-decoration: none;
  padding: 9px 12px;
  margin: 5px 0;
  border-radius: 8px;
  border: 1px solid transparent;
  color: var(--hub-ink);
}
.mlai-hub-res-item:hover {
  background: var(--hub-surface);
  border-color: var(--hub-line);
}
.mlai-hub-res-item .r-top {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 650;
}
.mlai-hub-res-item .r-book {
  font-size: 11px;
  font-weight: 600;
  color: var(--hub-jade);
}
.mlai-hub-res-item .r-sub {
  font-size: 12px;
  color: var(--hub-muted);
  margin-top: 3px;
}

@media (max-width: 640px) {
  .mlai-hub-dock {
    bottom: 10px;
    right: 10px;
    left: 10px;
    justify-content: space-between;
  }
  .mlai-hub-dock kbd {
    display: none;
  }
}
@media print {
  .mlai-hub-dock,
  .mlai-hub-modal-backdrop {
    display: none !important;
  }
}