/* ===== Design System: Personal App Builder ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Poppins:wght@500;600;700&display=swap');

:root {
  --font-primary: 'Inter', sans-serif;
  --font-heading: 'Poppins', sans-serif;
  --bg-primary: #0a0a14;
  --bg-secondary: #12122a;
  --text-primary: #ffffff;
  --text-secondary: #a0a0cc;
  --primary: #6c63ff;
  --primary-light: #8b83ff;
  --accent: #00e5ff;
  --danger: #ff4757;
  --success: #2ed573;
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --radius-lg: 24px;
  --radius-md: 16px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

body.light-mode {
  --bg-primary: #f0f2f5;
  --bg-secondary: #ffffff;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --glass-bg: rgba(255,255,255,0.7);
  --glass-border: rgba(0,0,0,0.1);
  --shadow: 0 8px 30px rgba(0,0,0,0.1);
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

/* particles background (CSS only) */
.particles-bg {
  position: fixed; top:0; left:0; width:100%; height:100%;
  background: radial-gradient(circle at 20% 30%, rgba(108,99,255,0.15), transparent 50%),
              radial-gradient(circle at 80% 70%, rgba(0,229,255,0.1), transparent 50%);
  z-index: 0;
  pointer-events: none;
}

/* Glass card */
.glass, .glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.glass-card:hover { transform: translateY(-2px); }

/* Container */
.container { max-width: 800px; margin: 0 auto; padding: 20px; }

/* Buttons */
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; border: none; padding: 12px 28px; border-radius: 50px;
  font-weight: 600; cursor: pointer; transition: all var(--transition);
  display: inline-flex; align-items: center; justify-content: center;
  text-decoration: none; box-shadow: 0 4px 15px rgba(108,99,255,0.4);
}
.btn-primary:hover { transform: scale(1.05); box-shadow: 0 6px 25px rgba(108,99,255,0.6); }
.btn-outline {
  border: 2px solid var(--primary); background: transparent; color: var(--text-primary);
  padding: 10px 24px; border-radius: 50px; font-weight: 600; transition: all var(--transition);
  text-decoration: none;
}
.btn-outline:hover { background: rgba(108,99,255,0.2); }
.btn-primary-sm, .btn-outline-sm { padding: 8px 18px; font-size: 0.9rem; border-radius: 40px; }

/* Form Inputs */
.input-group {
  position: relative; margin: 20px 0;
}
.input-group input, .input-group textarea {
  width: 100%;
  padding: 14px 16px 14px 44px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 1rem;
  outline: none;
  transition: border var(--transition);
}
.input-group input:focus, .input-group textarea:focus { border-color: var(--primary); }
.input-group label {
  position: absolute; top: 14px; left: 44px; font-size: 1rem; color: var(--text-secondary);
  pointer-events: none; transition: all var(--transition);
}
.input-group input:focus ~ label, .input-group input:not(:placeholder-shown) ~ label,
.input-group textarea:focus ~ label, .input-group textarea:not(:placeholder-shown) ~ label {
  top: -12px; left: 16px; font-size: 0.8rem; background: var(--bg-primary); padding: 0 8px; color: var(--primary);
}
.input-icon { position: absolute; left: 16px; top: 14px; opacity: 0.7; }
.toggle-password {
  position: absolute; right: 12px; top: 12px; background: none; border: none; color: var(--text-secondary); cursor: pointer;
}

.error-message {
  background: rgba(255,71,87,0.15); border: 1px solid var(--danger); color: var(--danger); padding: 10px; border-radius: 8px;
  margin: 10px 0; display: none;
}

/* Animations */
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }
@keyframes pulse { 0%{box-shadow:0 0 0 0 rgba(108,99,255,0.4)} 70%{box-shadow:0 0 0 10px rgba(108,99,255,0)} }
@keyframes shake { 0%,100%{transform:translateX(0)} 20%{transform:translateX(-5px)} 40%{transform:translateX(5px)} 60%{transform:translateX(-5px)} 80%{transform:translateX(5px)} }
.animate-float { animation: float 3s ease-in-out infinite; }
.btn-primary.pulse { animation: pulse 2s infinite; }

/* Toast (optional) */

/* Responsive */
@media (max-width: 768px) {
  .hero-title { font-size: 2rem; }
  .hero-stats { flex-direction: column; gap: 15px; }
}