* { box-sizing: border-box; }
body { font: 14px/1.4 -apple-system, system-ui, sans-serif; margin: 0; background: #f5f6f8; color: #222; }
.topbar { display: flex; align-items: center; gap: 1rem; padding: .6rem 1rem; background: #1f2533; color: #fff; }
.topbar .brand { font-weight: 700; color: #fff; text-decoration: none; }
.topbar nav { display: flex; gap: 1rem; }
.topbar nav a { color: #cbd2e0; text-decoration: none; }
.topbar nav a:hover { color: #fff; }
.topbar .logout { margin-left: auto; }
.topbar .logout button { background: transparent; color: #cbd2e0; border: 1px solid #3a4358; padding: .3rem .7rem; cursor: pointer; }
main { padding: 1rem; max-width: 1200px; margin: 0 auto; }
.flash { background: #e7f3ff; border: 1px solid #b6d8ff; padding: .5rem .8rem; margin-bottom: 1rem; border-radius: 4px; }
.error { background: #fde7e9; border: 1px solid #f5b5bd; padding: .5rem .8rem; margin-bottom: 1rem; border-radius: 4px; color: #6b1620; }
form.login { max-width: 320px; margin: 4rem auto; background: #fff; padding: 1.5rem; border-radius: 6px; box-shadow: 0 1px 3px rgba(0,0,0,.06); }
form.login h1 { margin: 0 0 1rem; font-size: 1.2rem; }
form.login label { display: block; margin-bottom: .8rem; }
form.login input { width: 100%; padding: .5rem; border: 1px solid #ccd; border-radius: 4px; }
form.login button { width: 100%; padding: .6rem; background: #1f2533; color: #fff; border: 0; border-radius: 4px; cursor: pointer; }
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { padding: .5rem .7rem; border-bottom: 1px solid #e6e8ee; text-align: left; }
th { background: #f0f2f6; font-weight: 600; }