:root {
  --bg: #0a0a0f;
  --surface: #12121a;
  --surface-hover: #1a1a25;
  --border: #1f1f2e;
  --text-primary: #f4f4f5;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent: #10b981;
  --accent-hover: #059669;
  --accent-light: rgba(16, 185, 129, 0.15);
  --gradient-1: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --gradient-2: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
  --gradient-3: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-image: 
    radial-gradient(circle at 15% 50%, rgba(16, 185, 129, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 85% 30%, rgba(139, 92, 246, 0.03) 0%, transparent 50%);
  background-attachment: fixed;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h1 { font-size: 2.5rem; line-height: 1.1; }
h2 { font-size: 2rem; line-height: 1.2; }
h3 { font-size: 1.5rem; line-height: 1.3; }

@media (min-width: 768px) {
  h1 { font-size: 3.5rem; }
  h2 { font-size: 2.5rem; }
}

a {
  color: inherit;
  text-decoration: none;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(16, 185, 129, 0.15);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

.btn-primary {
  background: var(--gradient-1);
  color: white;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--surface-hover);
  border-color: var(--surface-hover);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.1);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.2);
}

.input {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  border-radius: 8px;
  outline: none;
  transition: border-color 0.2s ease;
}

.input:focus {
  border-color: var(--accent);
}

.input::placeholder {
  color: var(--text-muted);
}

label {
  display: block;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-summit { background: rgba(236, 72, 153, 0.15); color: #f9a8d4; }
.badge-workshop { background: rgba(99, 102, 241, 0.15); color: #a5b4fc; }
.badge-showcase { background: rgba(6, 182, 212, 0.15); color: #67e8f9; }
.badge-mentor_hour { background: rgba(245, 158, 11, 0.15); color: #fcd34d; }
.badge-community { background: rgba(16, 185, 129, 0.15); color: #6ee7b7; }

.role-badge {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  font-weight: 600;
}

.role-member { background: rgba(99, 102, 241, 0.15); color: #a5b4fc; }
.role-volunteer { background: rgba(16, 185, 129, 0.15); color: #6ee7b7; }
.role-executive { background: rgba(139, 92, 246, 0.15); color: #c4b5fd; }
.role-cofounder { background: rgba(245, 158, 11, 0.15); color: #fcd34d; }

.section-reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.section-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.toast {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 1rem 1.25rem;
  border-radius: 8px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
  animation: slideIn 0.3s ease;
  max-width: 24rem;
}

.toast-success { border-left: 3px solid var(--accent); }
.toast-error { border-left: 3px solid #ef4444; }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}