:root {
  --bg: #0f1419;
  --bg-elev: #1a1f26;
  --bg-pane: #ffffff;
  --border: #2a3038;
  --text: #e6e9ef;
  --text-dim: #8b95a3;
  --accent: #1f93ff;
  --accent-hover: #45a8ff;
  --danger: #ef4444;
  --topbar-h: 48px;
  --pane-header-h: 32px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-mark {
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.5px;
  color: var(--accent);
}

.brand-title {
  font-size: 14px;
  color: var(--text);
}

.env-badge {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

body[data-env="staging"] .env-badge {
  background: #f59e0b;
  color: #1a1408;
}
body[data-env="production"] .env-badge {
  background: #10b981;
  color: #052e22;
}

.agent { display: flex; align-items: center; gap: 12px; }

.agent-name {
  font-size: 13px;
  color: var(--text-dim);
}

.agent-logout {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
}
.agent-logout:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.workspace {
  display: grid;
  grid-template-columns: 7fr 3fr;
  height: calc(100vh - var(--topbar-h));
  width: 100vw;
  gap: 1px;
  background: var(--border);
}

.pane {
  display: flex;
  flex-direction: column;
  background: var(--bg-pane);
  min-width: 0;
  min-height: 0;
}

.pane-header {
  height: var(--pane-header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
}

.pane-title {
  color: var(--text-dim);
  font-weight: 600;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.pane-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 11px;
}
.pane-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.pane-frame {
  flex: 1;
  border: 0;
  width: 100%;
  background: var(--bg-pane);
}

.login-screen {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.login-form {
  width: 100%;
  max-width: 360px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.login-title {
  margin: 0;
  font-size: 22px;
  color: var(--text);
}

.login-subtitle {
  margin: -8px 0 8px 0;
  font-size: 13px;
  color: var(--text-dim);
}

.login-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--text-dim);
}

.login-field input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px 10px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}
.login-field input:focus {
  outline: none;
  border-color: var(--accent);
}

.login-submit {
  background: var(--accent);
  color: white;
  border: 0;
  border-radius: 4px;
  padding: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
}
.login-submit:hover { background: var(--accent-hover); }

.login-error {
  color: var(--danger);
  font-size: 12px;
  margin: 0;
}

@media (max-width: 1100px) {
  .workspace { grid-template-columns: 6fr 4fr; }
}

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