:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-light: #334155;
  --text: #f8fafc;
  --text-muted: #94a3b8;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #22c55e;
  --error: #ef4444;
  --border: #334155;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

.navbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}

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

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  margin-left: 20px;
  font-size: 0.9rem;
}

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

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

h1 { margin-top: 0; font-size: 1.75rem; }

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

.btn {
  display: inline-block;
  padding: 10px 18px;
  background: var(--surface-light);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  font-size: 0.95rem;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.auth-box {
  max-width: 420px;
  margin: 60px auto;
  background: var(--surface);
  padding: 32px;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.auth-links {
  margin-top: 20px;
  text-align: center;
  color: var(--text-muted);
}

.auth-links a {
  color: var(--primary);
}

.alert {
  padding: 12px 16px;
  border-radius: 6px;
  margin-bottom: 20px;
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--error);
  color: var(--error);
}

.alert-success {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid var(--success);
  color: var(--success);
}

.stats {
  display: flex;
  gap: 20px;
  margin-bottom: 24px;
  color: var(--text-muted);
}

.email-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.email-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 12px;
  overflow: hidden;
}

.email-item a {
  display: block;
  padding: 16px;
  color: var(--text);
  text-decoration: none;
}

.email-item.unread {
  border-left: 4px solid var(--primary);
}

.email-item.read {
  opacity: 0.85;
}

.email-sender {
  font-weight: 600;
  margin-bottom: 4px;
}

.email-subject {
  color: var(--text-muted);
  margin-bottom: 8px;
}

.email-meta {
  display: flex;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.empty-state {
  text-align: center;
  padding: 60px 0;
  color: var(--text-muted);
}

.email-detail {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
}

.email-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
  margin-bottom: 20px;
}

.email-header h1 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.email-meta p {
  margin: 4px 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.email-body {
  margin-bottom: 24px;
}

.text-body {
  white-space: pre-wrap;
  font-family: inherit;
  background: var(--bg);
  padding: 16px;
  border-radius: 6px;
  border: 1px solid var(--border);
  margin: 0;
}

.compose-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
}

.settings-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 24px;
}

.settings-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}

.settings-table td {
  padding: 10px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  word-break: break-all;
}

.settings-table td:first-child {
  width: 120px;
  color: var(--text-muted);
}

.dns-value code {
  font-size: 0.75rem;
}

code {
  background: var(--bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "SF Mono", Monaco, monospace;
}

code.token {
  word-break: break-all;
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: 24px;
}

.footer {
  text-align: center;
  padding: 24px 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

.error-page {
  text-align: center;
  padding: 60px 0;
}