/* ============================================================
   VisionPro 学习站 · Enhancement Styles
   ============================================================ */

/* ===== 1. COMMAND PALETTE ===== */
.cp-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(10, 14, 23, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  opacity: 0;
  transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.cp-overlay.active {
  display: flex;
  opacity: 1;
}

.cp-modal {
  width: 100%;
  max-width: 560px;
  background: #151d2e;
  border: 1px solid #2f3d56;
  border-radius: 16px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(59, 130, 246, 0.1);
  overflow: hidden;
  animation: cpEnter 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes cpEnter {
  from { opacity: 0; transform: translateY(-8px) scale(0.98); }
  to { opacity: 1; transform: none; }
}

.cp-input-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  border-bottom: 1px solid #243044;
}

.cp-icon {
  font-size: 18px;
  opacity: 0.6;
}

.cp-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-size: 16px;
  color: #e8edf7;
  font-family: inherit;
}

.cp-input::placeholder {
  color: #64748b;
}

.cp-kbd {
  font-size: 11px;
  padding: 3px 8px;
  background: #0a0e17;
  border: 1px solid #243044;
  border-radius: 5px;
  color: #94a3b8;
  font-family: "SF Mono", "Consolas", monospace;
}

.cp-results {
  max-height: 400px;
  overflow-y: auto;
  padding: 8px;
}

.cp-results::-webkit-scrollbar { width: 6px; }
.cp-results::-webkit-scrollbar-thumb { background: #2f3d56; border-radius: 3px; }

.cp-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: 10px;
  color: #e8edf7;
  text-decoration: none;
  transition: background 0.1s;
  cursor: pointer;
}

.cp-item:hover,
.cp-item.active {
  background: rgba(59, 130, 246, 0.12);
  color: #e8edf7;
}

.cp-item.active {
  outline: 1px solid rgba(59, 130, 246, 0.3);
}

.cp-item-icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

.cp-item-label {
  flex: 1;
  font-size: 14px;
  font-weight: 500;
}

.cp-item-arrow {
  font-size: 12px;
  color: #64748b;
  opacity: 0;
  transition: opacity 0.15s;
}

.cp-item.active .cp-item-arrow {
  opacity: 1;
  color: #3b82f6;
}

.cp-empty {
  padding: 40px 20px;
  text-align: center;
  color: #64748b;
  font-size: 14px;
}

.cp-footer {
  display: flex;
  gap: 16px;
  padding: 10px 16px;
  border-top: 1px solid #243044;
  background: rgba(10, 14, 23, 0.5);
  font-size: 11px;
  color: #64748b;
}

.cp-footer kbd {
  padding: 1px 5px;
  background: #151d2e;
  border: 1px solid #243044;
  border-radius: 3px;
  font-family: "SF Mono", monospace;
  font-size: 10px;
}

/* Nav trigger */
.cp-trigger {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: #151d2e;
  border: 1px solid #243044;
  border-radius: 8px;
  color: #94a3b8;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
  margin-left: 8px;
}

.cp-trigger:hover {
  border-color: #3b82f6;
  color: #e8edf7;
}

.cp-trigger-icon { font-size: 13px; }

.cp-trigger-kbd {
  padding: 1px 5px;
  background: #0a0e17;
  border: 1px solid #243044;
  border-radius: 3px;
  font-size: 10px;
  font-family: "SF Mono", monospace;
  color: #64748b;
}

@media (max-width: 768px) {
  .cp-trigger-label { display: none; }
  .cp-trigger-kbd { display: none; }
  .cp-trigger { padding: 6px 10px; }
}

/* ===== 2. SKELETON LOADING ===== */
.sk-item {
  padding: 12px 24px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  border-left: 2px solid transparent;
}

.sk-num {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  background: #1c2538;
  flex-shrink: 0;
  animation: shimmer 1.4s ease-in-out infinite;
}

.sk-body {
  flex: 1;
  min-width: 0;
}

.sk-line {
  height: 14px;
  border-radius: 4px;
  background: #1c2538;
  margin-bottom: 8px;
  animation: shimmer 1.4s ease-in-out infinite;
}

.sk-line-title {
  width: 80%;
  height: 14px;
}

.sk-line-meta {
  width: 40%;
  height: 11px;
  margin-bottom: 0;
}

@keyframes shimmer {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; background: linear-gradient(90deg, #1c2538, #2a3550, #1c2538); background-size: 200% 100%; }
}

/* ===== 3. CARD MOUSE-FOLLOW GLOW ===== */
a.card,
.stat-box {
  position: relative;
}

a.card::after,
.stat-box::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    circle 250px at var(--mx, 50%) var(--my, 50%),
    rgba(59, 130, 246, 0.08),
    transparent 60%
  );
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
  z-index: 0;
}

a.card:hover::after,
.stat-box:hover::after {
  opacity: 1;
}

a.card > *,
.stat-box > * {
  position: relative;
  z-index: 1;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .sk-num,
  .sk-line,
  .cp-modal,
  .cp-overlay {
    animation: none !important;
    transition: none !important;
  }
}