* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  background: #0d1117;
  color: #c9d1d9;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

#topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: #161b22;
  border-bottom: 1px solid #30363d;
}

#brand {
  font-weight: 600;
}

#session-info {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: #8b949e;
}

#session-label {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

button {
  background: #238636;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 13px;
}

button:hover { background: #2ea043; }
button:disabled { background: #30363d; cursor: default; }

#landing {
  max-width: 560px;
  margin: 80px auto;
  text-align: center;
  padding: 0 16px;
}

#landing h1 { font-size: 24px; }
#landing p { color: #8b949e; margin-bottom: 24px; }
#landing button { padding: 10px 20px; font-size: 15px; }

#client-picker {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  margin-bottom: 16px;
}
#client-picker label { font-size: 13px; color: #8b949e; }
#client-picker select,
#client-picker input {
  background: #0d1117;
  border: 1px solid #30363d;
  border-radius: 6px;
  color: #c9d1d9;
  padding: 8px 10px;
  font-size: 14px;
  min-width: 220px;
}
#start-session:disabled { opacity: 0.5; }

#active-sessions { margin-top: 40px; text-align: left; }
#active-sessions h2 { font-size: 15px; color: #8b949e; font-weight: 600; margin-bottom: 8px; }
#active-sessions-list { list-style: none; padding: 0; margin: 0; }
#active-sessions-list li { margin-bottom: 6px; }
#active-sessions-list a {
  color: #58a6ff;
  text-decoration: none;
  font-size: 14px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
#active-sessions-list a:hover { text-decoration: underline; }
#active-sessions-empty { color: #8b949e; font-size: 14px; }

#terminal {
  height: calc(100vh - 49px);
  padding: 8px;
}

.xterm { height: 100%; }

#login-box {
  max-width: 360px;
  margin: 100px auto;
  text-align: center;
  padding: 0 16px;
}

#login-box h1 { font-size: 22px; }
#login-box p { color: #8b949e; margin-bottom: 20px; }

#login-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

#login-form input {
  background: #0d1117;
  border: 1px solid #30363d;
  border-radius: 6px;
  color: #c9d1d9;
  padding: 8px 10px;
  font-size: 14px;
}

#login-form button { padding: 10px; font-size: 15px; }

.error { color: #f85149; font-size: 13px; margin-top: 12px; }

#warning-banner {
  background: #3d2b00;
  color: #ffcc66;
  font-size: 13px;
  padding: 8px 16px;
  text-align: center;
  border-bottom: 1px solid #5a3f00;
}