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

body {
  font-family: system-ui, sans-serif;
  background: #f5f6f8;
  color: #0f172a;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px;
}

.topbar {
  background: #111827;
  color: #fff;
  padding: 16px 0;
}

.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.session-info {
  font-size: 14px;
  opacity: 0.8;
}

.session-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-logout {
  margin: 0;
  padding: 6px 12px;
  font-size: 13px;
  background: #ef4444;
  border: none;
  color: #fff;
  border-radius: 6px;
  cursor: pointer;
}

.btn-logout.hidden {
  display: none;
}

.card {
  background: #fff;
  border-radius: 12px;
  padding: 22px;
  margin-bottom: 24px;
  box-shadow: 0 10px 24px rgba(0,0,0,0.08);
}

.card.hidden {
  display: none;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

h2 {
  font-size: 18px;
}

label {
  display: block;
  margin: 12px 0 6px;
  font-size: 14px;
  color: #334155;
}

input, select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  font-size: 14px;
  background: #fff;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px 18px;
}

button {
  margin-top: 16px;
  background: #2563eb;
  color: #fff;
  border: none;
  padding: 12px 16px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
}

.btn-secondary {
  background: #10b981;
  color: #fff;
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 10px;
  display: inline-block;
  font-weight: 600;
}

.link-btn {
  text-decoration: none;
}

.result {
  margin-top: 16px;
  background: #0f172a;
  color: #e2e8f0;
  padding: 14px 16px;
  border-radius: 10px;
  font-size: 14px;
  min-height: 44px;
}

.result.success {
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.result.error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

/* Navigation styles moved to navigation.css */

@media (max-width: 640px) {
  .topbar .container {
    flex-direction: column;
    gap: 6px;
  }

  .card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .card-actions {
    flex-direction: column;
  }

  .btn-large {
    width: 100%;
    justify-content: center;
  }
}