/* Modern CSS variables and styles for KaiKai Apps */
:root {
  --primary: #4f46e5;
  --primary-glow: rgba(79, 70, 229, 0.4);
  --accent: #06b6d4;
  --accent-glow: rgba(6, 182, 212, 0.35);
  --bg-dark: #0b0f19;
  --bg-card: rgba(17, 24, 39, 0.75);
  --border-card: rgba(255, 255, 255, 0.1);
  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
}

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans TC", sans-serif;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  overflow-x: hidden;
}

/* Glassmorphism Classes */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
}

.glass-nav {
  background: rgba(11, 15, 25, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

/* Glowing text and buttons */
.text-gradient {
  background: linear-gradient(135deg, #60a5fa 0%, #a855f7 50%, #ec4899 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-cyan {
  background: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.glow-btn {
  position: relative;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 20px var(--primary-glow);
}

.glow-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px var(--primary-glow), 0 0 10px var(--accent-glow);
}

.glow-card {
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.glow-card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 12px 30px -10px rgba(79, 70, 229, 0.3);
}

/* Background Animated Blobs */
.bg-blob {
  position: absolute;
  filter: blur(90px);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
}

.blob-1 {
  top: 10%;
  left: 15%;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.35) 0%, transparent 70%);
}

.blob-2 {
  top: 40%;
  right: 10%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.25) 0%, transparent 70%);
}

.blob-3 {
  bottom: 15%;
  left: 20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.28) 0%, transparent 70%);
}

/* Badge styles */
.badge-tech {
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: #a5b4fc;
}

/* Mobile responsive menu */
#mobile-menu {
  transition: all 0.3s ease-in-out;
}