* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: #0f172a;
  color: #f8fafc;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: 70px;
}

/* Header */
.app-header {
  background-color: #1e293b;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #334155;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 32px;
  height: 32px;
}

.app-header h1 {
  font-size: 1.25rem;
  color: #38bdf8;
}

.status-badge {
  background-color: #059669;
  color: white;
  font-size: 0.75rem;
  padding: 4px 8px;
  border-radius: 12px;
  font-weight: 600;
}

/* Content */
.app-content {
  padding: 1.5rem;
  flex: 1;
  max-width: 600px;
  margin: 0 auto;
  width: 100%;
}

.card {
  background: #1e293b;
  padding: 1.5rem;
  border-radius: 16px;
  border: 1px solid #334155;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.card h2 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: #f1f5f9;
}

.card p {
  color: #94a3b8;
  font-size: 0.9rem;
  line-height: 1.4;
}

.action-box {
  margin-top: 1.5rem;
}

.btn-primary {
  width: 100%;
  background-color: #0284c7;
  color: white;
  border: none;
  padding: 0.85rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-primary:active {
  background-color: #0369a1;
}

.output-text {
  margin-top: 1rem;
  font-weight: 500;
  color: #38bdf8 !important;
  text-align: center;
}

/* Bottom Nav */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: #1e293b;
  display: flex;
  justify-content: space-around;
  padding: 8px 0;
  border-top: 1px solid #334155;
}

.nav-item {
  background: none;
  border: none;
  color: #64748b;
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 1.2rem;
  cursor: pointer;
}

.nav-item.active {
  color: #38bdf8;
}

.nav-item small {
  font-size: 0.7rem;
  margin-top: 2px;
}