:root {
  --fg: #1b1b1b;
  --muted: #666;
  --bg: #fafafa;
  --border: #ddd;
  --primary: #1877f2;
  --error-bg: #fde7e7;
}
* { box-sizing: border-box; }
body { font: 15px/1.5 system-ui, sans-serif; color: var(--fg); background: var(--bg); margin: 0; }
main { max-width: 960px; margin: 1.5rem auto; padding: 0 1rem; }
h1, h2, h3 { line-height: 1.2; }
a { color: var(--primary); }

.topnav { background: #222; color: #fff; padding: .6rem 1rem; display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }
.topnav a { color: #fff; text-decoration: none; }
.topnav a:hover { text-decoration: underline; }
.topnav .brand { font-weight: bold; font-size: 1.15em; }
.topnav .nav-user { margin-left: auto; color: #bbb; }
.topnav .linkish { background: none; border: none; color: #fff; cursor: pointer; padding: 0; font: inherit; }

.messages { list-style: none; padding: 0; margin: 1rem auto; max-width: 960px; }
.msg { padding: .6rem 1rem; border-radius: 4px; margin: .3rem 1rem; }
.msg--success { background: #e7fbe7; }
.msg--error, .msg--warning { background: var(--error-bg); }

.panel { background: #fff; border: 1px solid var(--border); border-radius: 6px; padding: 1.2rem; margin: 1rem 0; }
.panel--denied { background: var(--error-bg); }
.panel--error { background: var(--error-bg); border-color: #f5b7b7; }
.panel--login { max-width: 420px; }

table.data { width: 100%; border-collapse: collapse; margin: 1em 0; background: #fff; }
table.data th, table.data td { border: 1px solid var(--border); padding: .5em .7em; text-align: left; }
table.data th { background: #f2f2f2; }

.btn { display: inline-block; background: var(--primary); color: #fff; padding: .5rem 1rem; border-radius: 4px; text-decoration: none; }
.btn--google { background: #4285f4; }

.inline-form { margin: 1rem 0; padding: 1rem; background: #fff; border: 1px solid var(--border); border-radius: 6px; }
.logo-preview { display: flex; gap: .8rem; align-items: flex-end; margin: 1rem 0; }
.logo-preview img { border: 1px solid var(--border); background: repeating-conic-gradient(#eee 0 25%, #fff 0 50%) 50% / 16px 16px; }

.tag { display: inline-block; background: #eee; color: #333; padding: 0 .4em; border-radius: 3px; font-size: .85em; margin-left: .4em; }

pre { background: #fff; border: 1px solid var(--border); border-radius: 4px; padding: .8rem; overflow-x: auto; }
code { background: #f2f2f2; padding: 0 .3em; border-radius: 3px; }