/* ================================================================
   鲲鹏 Kunpeng — Utility Classes
   ================================================================ */

/* --- Text --- */
.accent {
  color: transparent;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
}

.gradient-text {
  color: transparent;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  font-weight: 700;
}

.accent-text { color: var(--cyan); }
.gold-text { color: var(--gold); }
.blue-text { color: var(--blue); }

.text-main { color: var(--text-main); }
.text-sec { color: var(--text-sec); }
.text-dim { color: var(--text-dim); }

.text-center { text-align: center; }
.text-right { text-align: right; }

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.gap-sm { gap: 8px; }
.gap-md { gap: 16px; }
.gap-lg { gap: 24px; }
.gap-xl { gap: 32px; }

/* --- Spacing --- */
.mt-sm { margin-top: 8px; }
.mt-md { margin-top: 16px; }
.mt-lg { margin-top: 24px; }
.mt-xl { margin-top: 32px; }
.mb-sm { margin-bottom: 8px; }
.mb-md { margin-bottom: 16px; }
.mb-lg { margin-bottom: 24px; }
.mb-xl { margin-bottom: 32px; }

/* --- Visibility --- */
.hidden { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* --- App Loading --- */
.app-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  gap: 20px;
  background: var(--deep-sea);
}

.app-loading-logo {
  animation: logoPulse 2s ease-in-out infinite;
}

.app-loading p {
  font-size: 14px;
  color: var(--text-dim);
  animation: fadeInOut 2s ease-in-out infinite;
}

@keyframes logoPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .5; transform: scale(.95); }
}

@keyframes fadeInOut {
  0%, 100% { opacity: .5; }
  50% { opacity: 1; }
}

/* --- Skeleton Loading --- */
.skeleton {
  background: linear-gradient(90deg, var(--surface) 25%, var(--hover) 50%, var(--surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}