:root {
  --primary-color: #2563EB;
  --accent-color: #10B981;
  --bg-color: #F9FAFB;
  --card-bg: #FFFFFF;
  --text-color: #111827;
  --text-muted: #6B7280;
  --border-color: #E5E7EB;
  --error-color: #EF4444;
  --success-color: #10B981;
  --radius: 8px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
  line-height: 1.5;
  min-height: 100vh;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.container--wide {
  max-width: 900px;
}

.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  padding: 2rem;
  margin-bottom: 1.5rem;
}

.header {
  text-align: center;
  margin-bottom: 2rem;
}

.header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.header p {
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
  color: var(--text-color);
}

.form-group input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.15s;
}

.form-group input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: opacity 0.15s;
  text-decoration: none;
}

.btn:hover { opacity: 0.9; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn--primary {
  background: var(--primary-color);
  color: #fff;
}

.btn--accent {
  background: var(--accent-color);
  color: #fff;
}

.btn--outline {
  background: transparent;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}

.btn--full { width: 100%; }

.btn--sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
}

.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.alert--error {
  background: #FEF2F2;
  color: var(--error-color);
  border: 1px solid #FECACA;
}

.alert--success {
  background: #F0FDF4;
  color: #166534;
  border: 1px solid #BBF7D0;
}

.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.875rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }

.hidden { display: none !important; }

.link-box {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.link-box input {
  flex: 1;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--bg-color);
}

.dial-in {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: var(--bg-color);
  border-radius: var(--radius);
  font-size: 0.875rem;
}

.dial-in strong { display: block; margin-bottom: 0.25rem; }

.visit-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
}

.visit-card:last-child { border-bottom: none; }

.visit-item {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color);
}

.visit-item:last-child { border-bottom: none; }

.visit-item__header {
  margin-bottom: 0.5rem;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: var(--card-bg);
  border-radius: 0.75rem;
  padding: 1.5rem;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
}

.spinner {
  display: inline-block;
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 640px) {
  .container { padding: 1rem 0.75rem; }
  .card { padding: 1.25rem; }
}