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

:root {
  --bg-primary: #0a0e14;
  --bg-secondary: #151b24;
  --bg-tertiary: #1a2332;
  --border-color: #2d3748;
  --text-primary: #e2e8f0;
  --text-secondary: #a0aec0;
  --text-muted: #718096;
  --accent-blue: #3182ce;
  --accent-green: #38a169;
  --accent-yellow: #d69e2e;
  --accent-red: #e53e3e;
  --status-processing: #d69e2e;
  --status-transit: #3182ce;
  --status-hold: #e53e3e;
  --status-delivered: #38a169;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 20px 0;
}

.header-content {
  margin-bottom: 15px;
  position: relative;
}

header h1 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--text-primary);
  margin-bottom: 5px;
}

.subtitle {
  font-size: 13px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.version {
  position: absolute;
  top: 0;
  right: 0;
  font-size: 11px;
  color: var(--text-muted);
  font-family: monospace;
}

nav {
  display: flex;
  gap: 30px;
  border-top: 1px solid var(--border-color);
  padding-top: 15px;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: color 0.2s;
}

nav a:hover {
  color: var(--text-primary);
}

nav a.active {
  color: var(--accent-blue);
}

main {
  flex: 1;
  padding: 40px 0;
}

h2 {
  font-size: 22px;
  margin-bottom: 10px;
  color: var(--text-primary);
}

h3 {
  font-size: 18px;
  margin-top: 30px;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.section-description {
  color: var(--text-secondary);
  margin-bottom: 30px;
  font-size: 14px;
}

.tracking-section {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 30px;
  margin-bottom: 30px;
}

.tracking-form {
  margin-top: 20px;
}

.input-group {
  margin-bottom: 20px;
}

.input-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.input-group input {
  width: 100%;
  max-width: 300px;
  padding: 12px 15px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  color: var(--text-primary);
  font-size: 16px;
  font-family: monospace;
  transition: border-color 0.2s;
}

.input-group input:focus {
  outline: none;
  border-color: var(--accent-blue);
}

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

.btn-primary {
  padding: 12px 30px;
  background-color: var(--accent-blue);
  color: var(--text-primary);
  border: none;
  border-radius: 3px;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn-primary:hover {
  background-color: #2c5aa0;
}

.btn-primary:active {
  background-color: #2a4d8f;
}

.btn-primary:disabled {
  background-color: #2d3748;
  cursor: not-allowed;
  opacity: 0.6;
}

.result-container {
  margin-top: 30px;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
  transition: opacity 0.3s ease-in-out;
}

.result-container.hidden {
  display: none;
}

.result-container.loading {
  opacity: 0.5;
}

.loading-state {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 2px;
  padding: 40px;
  text-align: center;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  margin: 0 auto 20px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.loading-text {
  font-size: 13px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.result-success {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 2px;
  padding: 25px;
  animation: fadeIn 0.4s ease-in-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-header {
  font-size: 14px;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border-color);
}

.result-error {
  background-color: rgba(229, 62, 62, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 2px;
  padding: 20px;
  color: var(--text-secondary);
  font-size: 14px;
  text-align: center;
  animation: fadeIn 0.4s ease-in-out;
}

.result-field {
  margin-bottom: 18px;
}

.result-field:last-child {
  margin-bottom: 0;
}

.result-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 5px;
}

.result-value {
  font-size: 14px;
  color: var(--text-primary);
}

.result-value.tracking-id {
  font-family: monospace;
  font-size: 16px;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

.result-value.remarks {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 15px;
  padding-top: 15px;
  border-top: 1px solid var(--border-color);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 25px;
}

.status-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 2px;
  font-size: 11px;
  font-weight: 600;
  font-family: monospace;
  letter-spacing: 1px;
  background-color: rgba(214, 158, 46, 0.1);
  color: var(--status-processing);
  border: 1px solid rgba(214, 158, 46, 0.3);
}

.timeline-section {
  margin-top: 25px;
}

.timeline-header {
  font-size: 13px;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
  font-weight: 600;
}

.timeline {
  position: relative;
  padding-left: 30px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  padding-bottom: 25px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: -30px;
  top: 5px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background-color: var(--bg-tertiary);
  border: 2px solid var(--border-color);
}

.timeline-item.active .timeline-marker {
  background-color: var(--accent-blue);
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 4px rgba(49, 130, 206, 0.2);
}

.timeline-content {
  padding-left: 5px;
}

.timeline-status {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 5px;
}

.status-code {
  font-family: monospace;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

.timeline-time {
  font-size: 11px;
  color: var(--text-muted);
  font-family: monospace;
}

.timeline-location {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.4;
}

.timeline-remarks {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.notice {
  background-color: var(--bg-secondary);
  border-left: 3px solid var(--accent-yellow);
  padding: 20px;
  border-radius: 3px;
}

.notice h3 {
  margin-top: 0;
  font-size: 16px;
  color: var(--accent-yellow);
}

.notice p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 10px;
}

.notice p:last-child {
  margin-bottom: 0;
}

.notice a {
  color: var(--accent-blue);
  text-decoration: none;
}

.notice a:hover {
  text-decoration: underline;
}

.info-section {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 40px;
}

.info-section p {
  color: var(--text-secondary);
  margin-bottom: 15px;
  font-size: 15px;
}

.info-section h3:first-of-type {
  margin-top: 20px;
}

.status-list {
  margin-top: 15px;
  margin-left: 20px;
}

.division-block {
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border-color);
}

.division-block:last-of-type {
  border-bottom: none;
  padding-bottom: 0;
}

.division-block h4 {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: 0.3px;
}

.division-block p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

.zone-details {
  margin-bottom: 20px;
  padding-left: 20px;
  border-left: 2px solid var(--border-color);
}

.zone-details h4 {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 5px;
  font-family: monospace;
  letter-spacing: 0.5px;
}

.zone-coverage {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}

.status-list dt {
  color: var(--text-primary);
  font-weight: 600;
  margin-top: 12px;
  font-size: 13px;
  font-family: monospace;
  letter-spacing: 1px;
}

.status-list dd {
  color: var(--text-secondary);
  margin-left: 20px;
  margin-top: 3px;
  font-size: 13px;
}

footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 25px 0;
  margin-top: auto;
}

footer p {
  color: var(--text-muted);
  font-size: 13px;
  text-align: center;
  margin-bottom: 5px;
}

footer p:last-child {
  margin-bottom: 0;
}

.footer-notice {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.timeline-item.hold .timeline-marker {
  background-color: var(--accent-yellow);
  border-color: var(--accent-yellow);
  box-shadow: 0 0 0 4px rgba(214, 158, 46, 0.2);
}

.security-verification {
  margin-top: 25px;
  padding: 25px;
  background-color: rgba(214, 158, 46, 0.05);
  border: 1px solid var(--accent-yellow);
  border-radius: 4px;
}

.security-alert {
  display: flex;
  gap: 15px;
  margin-bottom: 20px;
}

.alert-icon {
  font-size: 24px;
  color: var(--accent-yellow);
}

.alert-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-yellow);
  margin-bottom: 5px;
}

.alert-message {
  font-size: 13px;
  color: var(--text-secondary);
}

.code-verify-form {
  margin-top: 15px;
}

.code-input-group {
  margin-bottom: 15px;
}

.code-input-group label {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.code-input-group input {
  width: 100%;
  max-width: 200px;
  padding: 12px 15px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  color: var(--text-primary);
  font-size: 18px;
  font-family: monospace;
  letter-spacing: 2px;
  text-align: center;
}

.code-input-group input:focus {
  outline: none;
  border-color: var(--accent-yellow);
}

.code-attempts {
  margin-top: 8px;
  font-size: 11px;
  color: var(--text-muted);
}

.btn-verify {
  padding: 12px 25px;
  background-color: var(--accent-yellow);
  color: var(--bg-primary);
  border: none;
  border-radius: 3px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn-verify:hover {
  background-color: #c88d27;
}

.btn-verify:disabled {
  background-color: var(--border-color);
  cursor: not-allowed;
  opacity: 0.6;
}

.verify-feedback {
  margin-top: 15px;
  font-size: 13px;
}

.feedback-success {
  color: var(--accent-green);
  padding: 10px;
  background-color: rgba(56, 161, 105, 0.1);
  border: 1px solid var(--accent-green);
  border-radius: 3px;
}

.feedback-error {
  color: var(--accent-red);
  padding: 10px;
  background-color: rgba(229, 62, 62, 0.1);
  border: 1px solid var(--accent-red);
  border-radius: 3px;
}

.feedback-loading {
  color: var(--text-secondary);
  padding: 10px;
  background-color: rgba(49, 130, 206, 0.1);
  border: 1px solid var(--accent-blue);
  border-radius: 3px;
}

@media (max-width: 768px) {
  header h1 {
    font-size: 24px;
  }

  .tracking-section,
  .info-section {
    padding: 20px;
  }

  .input-group input {
    max-width: 100%;
  }

  nav {
    gap: 20px;
  }

  .summary-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .timeline {
    padding-left: 25px;
  }

  .timeline-marker {
    left: -25px;
  }
}