:root {
  --bg: #0f1419;
  --panel: #161b22;
  --panel-2: #1c232c;
  --border: #2a323c;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #3fb950;
  --accent-2: #58a6ff;
  --danger: #f85149;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.header {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.header h1 { font-size: 18px; margin: 0; }
.header .links { display: flex; gap: 16px; color: var(--muted); font-size: 13px; }

.container { max-width: 1100px; margin: 0 auto; padding: 20px; }

.address-bar {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.address-bar .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; }
.address-bar input[type="text"], .address-bar select {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 15px;
  font-family: ui-monospace, SFMono-Regular, monospace;
}
.address-bar .address {
  font-size: 18px;
  font-family: ui-monospace, SFMono-Regular, monospace;
  color: var(--accent);
  user-select: all;
}

button, .btn {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 14px;
  cursor: pointer;
  font-size: 14px;
}
button.primary { background: var(--accent-2); color: #0d1117; border-color: var(--accent-2); font-weight: 600; }
button.danger { background: var(--danger); color: #fff; border-color: var(--danger); }
button:hover { filter: brightness(1.1); }

.layout { display: grid; grid-template-columns: 360px 1fr; gap: 20px; margin-top: 20px; }
@media (max-width: 800px) { .layout { grid-template-columns: 1fr; } }

.inbox, .viewer {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-height: 400px;
  overflow: hidden;
}
.inbox header, .viewer header {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--panel-2);
  font-size: 13px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.email-list { list-style: none; margin: 0; padding: 0; max-height: 600px; overflow-y: auto; }
.email-list li {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}
.email-list li:hover { background: var(--panel-2); }
.email-list li.active { background: var(--panel-2); border-left: 3px solid var(--accent-2); padding-left: 11px; }
.email-list .from { font-weight: 600; }
.email-list .subject { color: var(--text); }
.email-list .meta { color: var(--muted); font-size: 12px; margin-top: 2px; }

.viewer .empty, .email-list .empty { padding: 40px 20px; text-align: center; color: var(--muted); }
.viewer .body {
  padding: 20px;
  max-height: 700px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.viewer .body iframe {
  width: 100%;
  height: 600px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
}
.viewer .meta-grid {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 6px 16px;
  font-size: 13px;
}
.viewer .meta-grid .k { color: var(--muted); }
.viewer .toolbar { padding: 10px 14px; display: flex; gap: 8px; border-bottom: 1px solid var(--border); }
.viewer .tab { background: transparent; padding: 4px 10px; border-radius: 4px; }
.viewer .tab.active { background: var(--accent-2); color: #0d1117; border-color: var(--accent-2); }

.attachments { padding: 12px 20px; border-top: 1px solid var(--border); font-size: 13px; }
.attachments .label { color: var(--muted); margin-bottom: 6px; }
.attachments ul { margin: 0; padding-left: 18px; }

.flash {
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 14px;
  background: #1f2937;
  border: 1px solid var(--border);
}
.flash.error { background: #3a1717; border-color: #6b1f1f; color: #fecaca; }
.flash.success { background: #14321b; border-color: #1f6b35; color: #b6f0c5; }

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
th { background: var(--panel-2); color: var(--muted); font-weight: 500; }
tr:last-child td { border-bottom: none; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; }
.badge.green { background: #0f3b1f; color: #b6f0c5; }
.badge.gray  { background: #2a323c; color: var(--muted); }
.badge.blue  { background: #0d2a4a; color: #b6d8ff; }

input[type="text"], input[type="password"], input[type="email"] {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 14px;
  width: 100%;
}

form .field { margin-bottom: 12px; }
form label { display: block; margin-bottom: 4px; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; }

code { background: var(--panel-2); padding: 2px 5px; border-radius: 4px; font-family: ui-monospace, SFMono-Regular, monospace; }