:root {
  --primary-hue: 217;
  --primary: hsl(var(--primary-hue), 91%, 60%);
  --primary-hover: hsl(var(--primary-hue), 91%, 50%);
  --accent-green: hsl(142, 71%, 45%);
  --accent-red: hsl(0, 84%, 60%);
  --bg: hsl(224, 25%, 6%);
  --surface: hsl(224, 20%, 10%);
  --surface-hover: hsl(224, 20%, 14%);
  --border: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(59, 130, 246, 0.5);
  --text: hsl(0, 0%, 98%);
  --text-muted: hsl(220, 15%, 65%);
  --text-dim: hsl(220, 10%, 45%);
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background-color: var(--bg); color: var(--text); font-family: var(--font-main); line-height: 1.6; overflow-x: hidden; position: relative; -webkit-font-smoothing: antialiased; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }
.glass-panel { background: rgba(255, 255, 255, 0.03); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border: 1px solid var(--border); border-radius: var(--radius-lg); transition: var(--transition); }
.navbar { position: sticky; top: 0; z-index: 100; background: rgba(13, 17, 23, 0.75); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); padding: 18px 0; }
.nav-container { display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 1.25rem; font-weight: 800; letter-spacing: -0.5px; }
.logo-accent { color: var(--primary); }
.badge-city { font-size: 0.75rem; font-weight: 600; color: var(--text-muted); background: rgba(255, 255, 255, 0.06); padding: 4px 10px; border-radius: var(--radius-full); margin-left: 8px; border: 1px solid var(--border); }
.nav-links { display: flex; gap: 32px; }
.nav-links a { color: var(--text-muted); text-decoration: none; font-size: 0.95rem; font-weight: 500; transition: var(--transition); }
.nav-links a:hover { color: var(--text); }
.btn { display: inline-flex; align-items: center; justify-content: center; font-family: inherit; font-weight: 600; text-decoration: none; border-radius: var(--radius-full); cursor: pointer; transition: var(--transition); border: 1px solid transparent; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 20px rgba(59, 130, 246, 0.35); }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(59, 130, 246, 0.45); }
.btn-outline { background: transparent; color: var(--text); border-color: var(--border); }
.btn-outline:hover { background: rgba(255, 255, 255, 0.05); border-color: var(--text-muted); }
.btn-sm { padding: 8px 16px; font-size: 0.85rem; }
.btn-md { padding: 12px 24px; font-size: 0.95rem; }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }
.section-tag { display: inline-block; font-size: 0.85rem; font-weight: 700; color: var(--primary); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 12px; padding: 4px 12px; background: rgba(59, 130, 246, 0.1); border-radius: var(--radius-full); border: 1px solid rgba(59, 130, 246, 0.2); }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 { font-size: 2.5rem; font-weight: 800; letter-spacing: -1px; margin-bottom: 16px; }
.form-box { max-width: 580px; margin: 0 auto; background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 40px; box-shadow: 0 20px 40px rgba(0,0,0,0.4); }
.form-group { margin-bottom: 20px; text-align: left; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 8px; color: var(--text-muted); }
.form-group input, .form-group select { width: 100%; padding: 14px 18px; background: rgba(0, 0, 0, 0.3); border: 1px solid var(--border); border-radius: var(--radius-md); color: #fff; font-size: 0.95rem; font-family: inherit; transition: var(--transition); }
.form-group input:focus, .form-group select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2); }
.success-alert { display: none; text-align: center; padding: 30px; }
.success-icon { width: 64px; height: 64px; background: rgba(34, 197, 94, 0.15); border: 1px solid rgba(34, 197, 94, 0.3); color: #22c55e; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 2rem; margin: 0 auto 20px; }
.speaker-card { background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 40px; display: grid; grid-template-columns: 180px 1fr; gap: 40px; align-items: center; }
.speaker-avatar { width: 160px; height: 160px; border-radius: 24px; background: linear-gradient(135deg, #3b82f6, #10b981); display: flex; align-items: center; justify-content: center; font-size: 4rem; margin: 0 auto; }
@media (max-width: 768px) { .speaker-card { grid-template-columns: 1fr; text-align: center; } }