/* Hexo Knowledge Graph — Obsidian-inspired dark theme */
/* Canvas background: deep violet-black with subtle light blooms */

.hexo-knowledge-graph {
  width: 100%;
  margin: 1.5rem 0 2rem;
  color: #c8c8d0;
  /* Inherit font-family from the page so canvas labels match the theme's body font */
  font-family: inherit;
}

/* ── Header ─────────────────────────────────────────────── */

.hexo-knowledge-graph__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.625rem;
}

.hexo-knowledge-graph__title {
  margin: 0.5rem 0 0.75rem;
  padding-left: 0.625rem;
  border-left: 3px solid rgba(138, 180, 248, 0.45);
  font-size: 1.5rem;
  font-weight: 550;
  letter-spacing: 0.04em;
  color: #d0d0dc;
}

.hexo-knowledge-graph__header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hexo-knowledge-graph__expand-btn {
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 6px;
  padding: 0.3rem 0.75rem;
  color: #9898a8;
  background: rgba(255, 255, 255, 0.03);
  cursor: pointer;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  transition: all 0.2s ease;
}
.hexo-knowledge-graph__expand-btn:hover {
  color: #c8c8e0;
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.16);
}

.hexo-knowledge-graph__reset {
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 6px;
  padding: 0.3rem 0.75rem;
  color: #9898a8;
  background: rgba(255, 255, 255, 0.03);
  cursor: pointer;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  transition: all 0.2s ease;
}
.hexo-knowledge-graph__reset:hover {
  color: #c8c8e0;
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.16);
}

/* ── Canvas wrapper — Obsidian dark gradient with light blooms ── */

.hexo-knowledge-graph__canvas-wrap {
  position: relative;
  width: 100%;
  height: var(--hexo-knowledge-graph-height, 620px);
  min-height: 400px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  overflow: hidden;
  /* Obsidian dark violet-black gradient */
  background:
    /* subtle bloom top-left */
    radial-gradient(ellipse 420px 320px at 18% 12%, rgba(90, 70, 140, 0.10), transparent 70%),
    /* subtle bloom bottom-right */
    radial-gradient(ellipse 360px 280px at 78% 82%, rgba(60, 80, 130, 0.08), transparent 70%),
    /* subtle bloom center-right */
    radial-gradient(ellipse 280px 240px at 65% 45%, rgba(70, 75, 120, 0.06), transparent 65%),
    /* base gradient */
    linear-gradient(155deg, #0f0d17 0%, #11131a 40%, #14161f 70%, #161820 100%);
}

.hexo-knowledge-graph__canvas {
  width: 100%;
  height: 100%;
  cursor: grab;
}
.hexo-knowledge-graph__canvas:active {
  cursor: grabbing;
}

/* ── Toolbar — Obsidian-style right-side buttons ────────── */

.hexo-knowledge-graph__toolbar {
  position: absolute;
  top: 10px;
  right: 10px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  z-index: 10;
}

.hexo-knowledge-graph__toolbar button {
  width: 30px;
  height: 30px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 5px;
  background: rgba(12, 10, 20, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: #7a7a92;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  font-size: 13px;
  line-height: 1;
  padding: 0;
  user-select: none;
}
.hexo-knowledge-graph__toolbar button:hover {
  color: #c0c0d8;
  background: rgba(22, 20, 34, 0.82);
  border-color: rgba(255, 255, 255, 0.13);
}
.hexo-knowledge-graph__toolbar button.is-active {
  color: #8ab4f8;
  border-color: rgba(138, 180, 248, 0.28);
  background: rgba(30, 28, 48, 0.82);
}

.hexo-knowledge-graph__toolbar-divider {
  width: 18px;
  height: 1px;
  background: rgba(255, 255, 255, 0.06);
  margin: 3px 6px;
}

/* ── Search ─────────────────────────────────────────────── */

.hexo-knowledge-graph__search {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 10;
}

.hexo-knowledge-graph__search-input {
  width: 160px;
  padding: 5px 9px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 5px;
  background: rgba(12, 10, 20, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: #c8c8d8;
  font-size: 11.5px;
  outline: none;
  transition: all 0.2s ease;
  font-family: inherit;
}
.hexo-knowledge-graph__search-input::placeholder {
  color: #4e4e60;
}
.hexo-knowledge-graph__search-input:focus {
  border-color: rgba(138, 180, 248, 0.35);
  width: 195px;
}

.hexo-knowledge-graph__search-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 5px;
  background: rgba(12, 10, 20, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  max-height: 180px;
  overflow-y: auto;
  display: none;
}
.hexo-knowledge-graph__search-dropdown.is-open {
  display: block;
}
.hexo-knowledge-graph__search-item {
  padding: 5px 9px;
  cursor: pointer;
  font-size: 11.5px;
  color: #9898a8;
  transition: all 0.12s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}
.hexo-knowledge-graph__search-item:hover {
  background: rgba(138, 180, 248, 0.10);
  color: #c8c8d8;
}
.hexo-knowledge-graph__search-item .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ── Detail panel — Obsidian-style floating card ────────── */

.hexo-knowledge-graph__detail {
  position: absolute;
  bottom: 12px;
  right: 12px;
  width: 210px;
  max-width: calc(100% - 56px);
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  background: rgba(12, 10, 20, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: #b0b0c0;
  font-size: 11.5px;
  line-height: 1.5;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.22s ease, transform 0.22s ease;
  pointer-events: none;
  z-index: 10;
}
.hexo-knowledge-graph__detail.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.hexo-knowledge-graph__detail-title {
  font-size: 13px;
  font-weight: 550;
  color: #dcdcf0;
  margin-bottom: 8px;
  padding-right: 16px;
  letter-spacing: 0.02em;
}
.hexo-knowledge-graph__detail-stats {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.hexo-knowledge-graph__detail-stat {
  display: flex;
  justify-content: space-between;
  color: #787890;
}
.hexo-knowledge-graph__detail-stat span:last-child {
  color: #b0b0c0;
}
.hexo-knowledge-graph__detail-close {
  position: absolute;
  top: 8px;
  right: 8px;
  background: none;
  border: none;
  color: #5a5a70;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  padding: 2px 4px;
  border-radius: 3px;
  transition: color 0.15s ease;
}
.hexo-knowledge-graph__detail-close:hover {
  color: #b0b0c8;
}

/* ── Legend / cluster indicator ─────────────────────────── */

.hexo-knowledge-graph__legend {
  position: absolute;
  bottom: 12px;
  left: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  z-index: 5;
  pointer-events: none;
}
.hexo-knowledge-graph__legend-item {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 10.5px;
  color: #787890;
  letter-spacing: 0.02em;
}
.hexo-knowledge-graph__legend-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ── Status ─────────────────────────────────────────────── */

.hexo-knowledge-graph__status {
  margin: 0.5rem 0 0;
  color: rgba(160, 160, 180, 0.45);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
}

.hexo-knowledge-graph.is-ready .hexo-knowledge-graph__status {
  display: none;
}
.hexo-knowledge-graph.is-error .hexo-knowledge-graph__canvas-wrap {
  display: none;
}

/* ── Canvas fade-in on load ─────────────────────────────── */

.hexo-knowledge-graph__canvas-wrap {
  animation: kg-canvas-fade-in 0.7s ease-out;
}

@keyframes kg-canvas-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ── Mobile ─────────────────────────────────────────────── */

@media (max-width: 720px) {
  .hexo-knowledge-graph__canvas-wrap {
    height: min(var(--hexo-knowledge-graph-height, 620px), 60vh);
    min-height: 380px;
    border-radius: 8px;
  }
  .hexo-knowledge-graph__header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.4rem;
  }
  .hexo-knowledge-graph__title {
    font-size: 1.4rem;
  }
  .hexo-knowledge-graph__toolbar {
    top: 6px;
    right: 6px;
    gap: 4px;
  }
  .hexo-knowledge-graph__toolbar button {
    width: 28px;
    height: 28px;
    font-size: 12px;
  }
  .hexo-knowledge-graph__search-input {
    width: 120px;
    font-size: 11px;
  }
  .hexo-knowledge-graph__search-input:focus {
    width: 150px;
  }
  .hexo-knowledge-graph__detail {
    width: 170px;
    padding: 10px 12px;
    bottom: 8px;
    right: 8px;
    font-size: 11px;
  }
  .hexo-knowledge-graph__legend {
    display: none;
  }
}

@media (max-width: 480px) {
  .hexo-knowledge-graph__toolbar {
    top: 4px;
    right: 4px;
  }
  .hexo-knowledge-graph__toolbar button {
    width: 26px;
    height: 26px;
    font-size: 11px;
    border-radius: 4px;
  }
  .hexo-knowledge-graph__search-input {
    width: 100px;
  }
  .hexo-knowledge-graph__search-input:focus {
    width: 130px;
  }
  .hexo-knowledge-graph__detail {
    width: 150px;
    padding: 8px 10px;
    bottom: 6px;
    right: 40px;
  }
}