:root {
  --admin-bg: #FFFFFF;
  --admin-bg-alt: #F9FAFB;
  --admin-bg-card: #FFFFFF;
  --admin-border: #E5E7EB;
  --admin-border-strong: #D1D5DB;
  --admin-text: #111827;
  --admin-text-secondary: #6B7280;
  --admin-text-muted: #9CA3AF;
  --admin-accent: #3B82F6;
  --admin-accent-hover: #2563EB;
  --admin-accent-bg: #EFF6FF;
  --admin-success: #10B981;
  --admin-warning: #F59E0B;
  --admin-danger: #EF4444;
  --role-owner: #C9A84C;
  --role-engineer: #3B82F6;
  --role-support: #8B5CF6;
  --role-billing: #10B981;
  --role-readonly: #6B7280;
  --admin-font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }
body { font-family: var(--admin-font); background: var(--admin-bg); color: var(--admin-text); margin: 0; padding: 0; font-size: 14px; line-height: 1.5; }
h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 600; }
a { color: var(--admin-accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: 14px; }

/* Login page */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--admin-bg-alt); }
.login-card { background: var(--admin-bg-card); border: 1px solid var(--admin-border); border-radius: 8px; padding: 40px; width: 100%; max-width: 400px; box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
.login-card h1 { font-size: 20px; margin-bottom: 8px; }
.login-card .subtitle { color: var(--admin-text-secondary); font-size: 13px; margin-bottom: 24px; }
.login-card label { display: block; font-size: 12px; font-weight: 500; color: var(--admin-text-secondary); margin-bottom: 6px; margin-top: 16px; text-transform: uppercase; letter-spacing: 0.04em; }
.login-card input { width: 100%; padding: 10px 12px; border: 1px solid var(--admin-border); border-radius: 6px; background: var(--admin-bg); }
.login-card input:focus { outline: none; border-color: var(--admin-accent); box-shadow: 0 0 0 3px var(--admin-accent-bg); }
.login-card button { width: 100%; padding: 10px 16px; margin-top: 24px; background: var(--admin-accent); color: white; border: none; border-radius: 6px; font-weight: 500; font-size: 14px; }
.login-card button:hover { background: var(--admin-accent-hover); }
.login-footer { text-align: center; color: var(--admin-text-muted); font-size: 12px; margin-top: 24px; }

/* Dashboard layout */
.app-shell { display: flex; min-height: 100vh; }
.sidebar { width: 240px; background: var(--admin-bg-alt); border-right: 1px solid var(--admin-border); padding: 20px 0; }
.sidebar-brand { padding: 0 20px 20px 20px; font-weight: 600; font-size: 14px; border-bottom: 1px solid var(--admin-border); margin-bottom: 12px; }
.sidebar-nav { list-style: none; padding: 0; margin: 0; }
.sidebar-nav li a { display: block; padding: 8px 20px; color: var(--admin-text-secondary); font-size: 13px; border-left: 3px solid transparent; }
.sidebar-nav li a:hover { background: var(--admin-bg); color: var(--admin-text); text-decoration: none; }
.sidebar-nav li a.active { background: var(--admin-accent-bg); color: var(--admin-accent); border-left-color: var(--admin-accent); font-weight: 500; }
.main-area { flex: 1; display: flex; flex-direction: column; }
.topbar { height: 56px; border-bottom: 1px solid var(--admin-border); padding: 0 24px; display: flex; align-items: center; justify-content: space-between; background: var(--admin-bg); }
.topbar .title { font-weight: 600; font-size: 14px; }
.topbar .role-badge { font-size: 11px; font-weight: 600; padding: 4px 10px; border-radius: 12px; text-transform: uppercase; letter-spacing: 0.06em; background: rgba(201,168,76,0.12); color: var(--role-owner); border: 1px solid rgba(201,168,76,0.25); }
.content { padding: 32px; flex: 1; }
.content h2 { font-size: 18px; margin-bottom: 8px; }
.content .placeholder { color: var(--admin-text-secondary); font-size: 14px; }