:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --border: #e2e5ea;
  --ink: #1a1d23;
  --muted: #6c7280;
  --primary: #2d6cdf;
  --primary-dark: #2459bd;
  --primary-light: #e8f0fe;
  --ok: #1f9d57;
  --warn-bg: #fdecea;
  --warn-ink: #b3261e;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.05), 0 4px 16px rgba(16, 24, 40, 0.05);
  --maxw: 980px;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.55 "Segoe UI", system-ui, -apple-system, Arial, sans-serif; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.muted { color: var(--muted); }
.mono { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 0.875em; }
.mt { margin-top: 1rem; }
.grow { flex: 1; }
h1 { font-size: 1.5rem; margin: 0; letter-spacing: -0.01em; }
h2.section { font-size: 1.1rem; margin: 1.75rem 0 0.75rem; }

/* shell */
.topbar { background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.topbar .inner { max-width: var(--maxw); margin: 0 auto; padding: 0.7rem 1.25rem; display: flex; align-items: center; gap: 1rem; }
.brand { font-weight: 800; letter-spacing: -0.02em; font-size: 1.1rem; color: var(--ink); }
.brand span { color: var(--primary); }
.brand-lg { font-size: 1.5rem; display: block; margin-bottom: 0.25rem; }
.topnav { display: flex; gap: 0.25rem; }
.navlink { padding: 0.35rem 0.7rem; border-radius: 7px; color: var(--muted); font-weight: 500; }
.navlink:hover, .navlink.active { background: var(--primary-light); color: var(--primary-dark); text-decoration: none; }
.who { color: var(--muted); font-size: 0.85rem; }
.main { max-width: var(--maxw); margin: 0 auto; padding: 1.5rem 1.25rem 4rem; }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem; font: inherit; font-weight: 600; padding: 0.55rem 1rem; border-radius: 8px; border: 1px solid transparent; cursor: pointer; }
.btn:disabled { opacity: 0.55; cursor: default; }
.btn-sm { padding: 0.4rem 0.75rem; font-size: 0.85rem; }
.btn-block { width: 100%; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-dark); text-decoration: none; }
.btn-ghost { background: transparent; color: var(--primary); border-color: var(--border); }
.btn-ghost:hover { background: var(--primary-light); text-decoration: none; }

/* page head */
.page-head { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; }
.page-head .btn { margin-left: auto; }
.crumb { margin: 0 0 0.5rem; font-size: 0.85rem; }

/* cards / forms */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.1rem 1.25rem; }
.card-h { margin: 0 0 0.85rem; font-size: 1rem; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.85rem 1rem; margin-bottom: 1.25rem; }
.form-grid .btn, .form-grid .note { grid-column: 1 / -1; }
.form-row { display: flex; flex-wrap: wrap; gap: 0.85rem; align-items: end; }
.form-row .btn { margin-bottom: 1px; }
.field { display: flex; flex-direction: column; gap: 0.3rem; }
.field > span { font-size: 0.8rem; color: var(--muted); }
.field.grow2 { flex: 1; min-width: 14rem; }
.input { padding: 0.5rem 0.6rem; font: inherit; font-size: 0.92rem; border: 1px solid var(--border); border-radius: 7px; background: #fff; color: var(--ink); min-width: 8rem; }
.input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }

/* filters / chips */
.filters { display: flex; gap: 0.4rem; margin: 0.5rem 0 1rem; }
.chip { font: inherit; font-size: 0.85rem; padding: 0.3rem 0.8rem; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); color: var(--muted); cursor: pointer; }
.chip.on { background: var(--primary); color: #fff; border-color: var(--primary); }

/* table */
.table { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.table th { text-align: left; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--muted); padding: 0.6rem 0.8rem; border-bottom: 1px solid var(--border); background: #fafbfc; }
.table td { padding: 0.6rem 0.8rem; border-bottom: 1px solid var(--bg); }
.table tbody tr:last-child td { border-bottom: none; }

/* tags */
.tag { display: inline-block; padding: 0.1rem 0.55rem; border-radius: 999px; font-size: 0.75rem; font-weight: 600; }
.brand-pkg { background: var(--primary-light); color: var(--primary-dark); }
.brand-aware_design { background: #efeafd; color: #6c45c9; }
.src-manual { background: #fff3da; color: #9a6700; }
.src-stripe { background: #e3f6ec; color: var(--ok); }

/* misc */
.kv { display: flex; justify-content: space-between; gap: 1rem; padding: 0.3rem 0; border-bottom: 1px solid var(--bg); }
.kv:last-child { border-bottom: none; }
.note { padding: 0.6rem 0.85rem; border-radius: 8px; font-size: 0.9rem; }
.note.warn { background: var(--warn-bg); color: var(--warn-ink); }
.state, .screen-center { display: grid; place-items: center; min-height: 50vh; color: var(--muted); text-align: center; }
.screen-center { min-height: 100vh; }
.fineprint { color: var(--muted); font-size: 0.8rem; margin: 0.75rem 0 0; }
.login-card { width: 100%; max-width: 360px; background: var(--surface); border: 1px solid var(--border); border-radius: 14px; box-shadow: var(--shadow); padding: 2rem 1.75rem; text-align: center; }