* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, "Noto Sans KR", sans-serif;
  background: #111827;
  color: #e5e7eb;
}

.hidden {
  display: none !important;
}

.login-view {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  width: min(420px, 100%);
  background: #1f2937;
  border: 1px solid #374151;
  border-radius: 18px;
  padding: 28px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.32);
}

.login-card h1 {
  margin: 0 0 8px;
  font-size: 28px;
}

.login-card p {
  margin-bottom: 18px;
}

.login-message {
  min-height: 22px;
  margin-top: 12px;
  color: #fca5a5;
}

.app {
  width: min(1200px, 100%);
  margin: 0 auto;
  padding: 24px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

h1 {
  margin: 0;
  font-size: 28px;
}

h2 {
  margin: 0 0 16px;
  font-size: 20px;
}

p {
  color: #9ca3af;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.card {
  background: #1f2937;
  border: 1px solid #374151;
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.row {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid #374151;
  padding: 10px 0;
  gap: 16px;
}

.row:last-child {
  border-bottom: 0;
}

.row span {
  color: #9ca3af;
}

.row strong {
  color: #f9fafb;
  text-align: right;
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 11px 14px;
  background: #2563eb;
  color: white;
  cursor: pointer;
  font-weight: 700;
}

button:hover {
  background: #1d4ed8;
}

button:active {
  transform: scale(0.98);
}

button.secondary {
  background: #4b5563;
}

button.secondary:hover {
  background: #374151;
}

input {
  width: 100%;
  border: 1px solid #4b5563;
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 10px;
  background: #111827;
  color: #e5e7eb;
}

.form-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, 1fr);
  gap: 10px;
}

.coordinate-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid #243044;
}

.coordinate-line:last-child {
  border-bottom: 0;
}

button.small {
  padding: 6px 10px;
  border-radius: 8px;
}

button.danger {
  background: #b91c1c;
}

button.danger:hover {
  background: #991b1b;
}

pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: #0b1220;
  border-radius: 12px;
  padding: 14px;
  max-height: 300px;
  overflow: auto;
  color: #d1d5db;
}

.result {
  margin-top: 12px;
  color: #93c5fd;
}

@media (max-width: 800px) {
  .grid {
    grid-template-columns: 1fr;
  }

  header {
    flex-direction: column;
    align-items: flex-start;
  }

  .form-grid {
    grid-template-columns: 1fr 1fr;
  }
}