:root {
  --ink: #09090b;
  --text: #27272a;
  --muted: #71717a;
  --line: #e4e4e7;
  --bg: #f4f4f5;
  --card: #ffffff;
  --green: #059669;
  --green-dark: #047857;
  --red: #dc2626;
  --amber: #b45309;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--green-dark); }
h1 { font-size: 24px; margin: 0 0 16px; color: var(--ink); }
h2 { font-size: 17px; margin: 24px 0 8px; color: var(--ink); }

.topbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; background: var(--ink); padding: 12px 24px; }
.topbar .brand { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 600; }
.topbar nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.topbar nav a, .topbar nav .link { color: #d4d4d8; text-decoration: none; padding: 6px 10px; border-radius: 6px; font-size: 14px; }
.topbar nav a:hover, .topbar nav a.active { background: #27272a; color: #fff; }

main { max-width: 1280px; margin: 0 auto; padding: 24px 16px 64px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.card.narrow { max-width: 560px; }
.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.toolbar h1 { margin: 0; }

label { display: block; margin: 0 0 12px; font-size: 14px; font-weight: 500; color: var(--ink); }
input, select, textarea { display: block; width: 100%; margin-top: 4px; padding: 8px 10px; border: 1px solid #d4d4d8; border-radius: 8px; font: inherit; background: #fff; color: var(--text); }
input[type="checkbox"] { display: inline; width: auto; margin: 0; }
textarea.code { font: 13px/1.5 ui-monospace, Consolas, monospace; }
fieldset { border: 0; padding: 0; margin: 0; }
fieldset:disabled { opacity: 0.7; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
form.inline { display: inline; }
form.inline label { display: inline-block; }

button, .button { display: inline-block; padding: 8px 14px; border: 1px solid #d4d4d8; border-radius: 8px; background: #fff; color: var(--ink); font: inherit; font-size: 14px; font-weight: 500; cursor: pointer; text-decoration: none; }
button:hover, .button:hover { border-color: #a1a1aa; }
button.primary { background: var(--green); border-color: var(--green); color: #fff; }
button.primary:hover { background: var(--green-dark); }
button.danger { background: var(--red); border-color: var(--red); color: #fff; }
button.link { border: 0; background: none; padding: 6px 10px; }
button:disabled { opacity: 0.5; cursor: default; }
.danger-text { color: var(--red); }

.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.flash.error { background: #fef2f2; color: #991b1b; border-color: #fecaca; }

.stats { color: var(--muted); margin: 0 0 12px; }
.bulkbar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; position: sticky; top: 0; z-index: 2; background: var(--bg); padding: 8px 0; }
.bulk-progress { color: var(--muted); font-size: 14px; }

.table-wrap { overflow-x: auto; background: var(--card); border: 1px solid var(--line); border-radius: 12px; }
table.list { width: 100%; border-collapse: collapse; font-size: 14px; }
table.list th { text-align: left; font-weight: 600; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; padding: 10px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
table.list td { padding: 10px 12px; border-bottom: 1px solid #f4f4f5; vertical-align: top; }
table.list tr:last-child td { border-bottom: 0; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.good { color: var(--green-dark); }
.bad { color: var(--red); }

.pill { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; background: #f4f4f5; color: var(--muted); white-space: nowrap; }
.pill.sent { background: #ecfdf5; color: #047857; }
.pill.sample { background: #fffbeb; color: var(--amber); }
.pill.failed { background: #fef2f2; color: var(--red); }

.split { display: grid; grid-template-columns: minmax(320px, 440px) 1fr; gap: 20px; align-items: start; }
.preview iframe { width: 100%; height: 80vh; min-height: 600px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
ul.plain { list-style: none; padding: 0; margin: 0; }
ul.plain li { padding: 6px 0; border-bottom: 1px solid #f4f4f5; }
.mapping { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 0 16px; margin: 16px 0; }
table.help { font-size: 13px; border-collapse: collapse; }
table.help td { padding: 4px 8px 4px 0; vertical-align: top; }
code { font: 12px ui-monospace, Consolas, monospace; background: #f4f4f5; padding: 1px 4px; border-radius: 4px; }

@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; }
  .row2 { grid-template-columns: 1fr; }
  .topbar { padding: 12px 16px; }
}