/* components.css — 按钮 / 卡片 / 光效 */

/* 背景 canvas + 光标光晕 */
#bg { position: fixed; inset: 0; z-index: -2; width: 100%; height: 100%; }

.cursor-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.15), transparent 65%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.3s;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), box-shadow 0.3s, background 0.3s;
}
.btn--primary { background: var(--grad); background-size: 180% auto; color: #0a0a12; }
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(139, 92, 246, 0.45); }
.btn--ghost { background: var(--surface); border-color: var(--border-strong); color: var(--text); }
.btn--ghost:hover { transform: translateY(-3px); background: var(--surface-2); }

/* 卡片 */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1.6rem;
  min-height: 210px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform 0.3s var(--ease), background 0.3s, border-color 0.3s, opacity 0.6s ease;
}
/* 悬停时点亮的渐变描边 */
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  padding: 1px;
  border-radius: inherit;
  background: var(--grad);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.35s;
}
.card:hover { transform: translateY(-6px); background: var(--surface-2); }
.card:hover::before { opacity: 1; }

.card__icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  font-size: 1.7rem;
  border-radius: 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  margin-bottom: 1.1rem;
}
.card__title { font-size: 1.3rem; font-weight: 600; }
.card__desc { color: var(--muted); font-size: 0.95rem; margin: 0.5rem 0 1rem; flex: 1; }
.card__tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.1rem; }
.card__tag {
  font-size: 0.72rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--muted);
  border: 1px solid var(--border);
}
.card__go {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  color: #22d3ee;
  font-size: 0.95rem;
}
.card__go span { transition: transform 0.25s var(--ease); }
.card:hover .card__go span { transform: translateX(5px); }

/* 占位(待添加)卡片 */
.card--ghost {
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--muted);
  border-style: dashed;
  background: transparent;
}
.card--ghost:hover { transform: none; background: transparent; border-color: var(--border-strong); }
.card--ghost::before { display: none; }