:root {
  --bg: #f4f6fb;
  --card: #fff;
  --text: #1c2333;
  --muted: #6b7385;
  --line: #e3e7ef;
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --wa: #16a34a;
  --sms: #0ea5e9;
  --danger: #dc2626;
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); }
h1, h2, h3 { margin: 0 0 12px; line-height: 1.25; }
h1 { font-size: 22px; }
h2 { font-size: 17px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.error { color: var(--danger); min-height: 1.2em; margin: 6px 0; }
.ok { color: var(--wa); }

input, textarea, select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px;
  font: inherit; color: inherit; background: #fff;
}
input:focus, textarea:focus { outline: 2px solid #c7d2fe; border-color: var(--primary); }
textarea { resize: vertical; min-height: 150px; }
label { display: block; font-weight: 600; font-size: 14px; margin: 12px 0 0; }
label input, label textarea { margin-top: 6px; font-weight: 400; }

.btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 9px 16px; border-radius: 8px;
  border: 1px solid var(--line); background: #fff; color: var(--text); font: inherit; font-weight: 600; cursor: pointer;
}
.btn:hover { background: #f1f3f8; }
.btn:disabled { opacity: .55; cursor: default; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.danger { color: var(--danger); }
.btn.full { width: 100%; justify-content: center; margin-top: 10px; }
.btn.sm { padding: 5px 10px; font-size: 13px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }

/* login */
.login-page { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: 100%; max-width: 380px; }
.brand { font-weight: 800; font-size: 20px; display: flex; align-items: center; gap: 8px; }
.logo { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 9px; background: var(--primary); color: #fff; font-size: 18px; }

/* layout */
.top { background: #fff; border-bottom: 1px solid var(--line); }
.top-inner { max-width: 1100px; margin: 0 auto; padding: 12px 16px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.tabs { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.tab { padding: 8px 14px; border-radius: 8px; border: 0; background: none; font: inherit; font-weight: 600; color: var(--muted); cursor: pointer; }
.tab.active { background: #eef0ff; color: var(--primary); }
main { max-width: 1100px; margin: 0 auto; padding: 20px 16px 60px; }
.view { display: none; }
.view.active { display: block; }
.grid2 { display: grid; grid-template-columns: 1.3fr 1fr; gap: 16px; align-items: start; }
@media (max-width: 800px) { .grid2 { grid-template-columns: 1fr; } }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row.end { justify-content: flex-end; }
.spacer { flex: 1; }
.stack > * + * { margin-top: 16px; }

/* channel picker */
.channels { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.channel { border: 2px solid var(--line); border-radius: 10px; padding: 12px; cursor: pointer; text-align: center; background: #fff; font: inherit; }
.channel.active.whatsapp { border-color: var(--wa); background: #f0fdf4; color: var(--wa); }
.channel.active.sms { border-color: var(--sms); background: #f0f9ff; color: #0369a1; }

/* templates */
.templates { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
.tpl { text-align: left; border: 1px solid var(--line); border-radius: 10px; padding: 10px; background: #fff; cursor: pointer; font: inherit; }
.tpl:hover, .tpl.active { border-color: var(--primary); background: #f5f6ff; }
.tpl b { display: block; font-size: 14px; }
.tpl span { font-size: 12px; color: var(--muted); }

/* tables */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); font-size: 14px; }
th { color: var(--muted); font-weight: 600; font-size: 13px; }
td.chk, th.chk { width: 34px; }
td.chk input, th.chk input { width: auto; }
.table-wrap { max-height: 420px; overflow: auto; border: 1px solid var(--line); border-radius: 10px; }
.table-wrap th { position: sticky; top: 0; background: #fafbfd; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 99px; font-size: 12px; font-weight: 700; }
.badge.whatsapp { background: #dcfce7; color: #166534; }
.badge.sms { background: #e0f2fe; color: #075985; }
.badge.sending { background: #fef9c3; color: #854d0e; }
.badge.done, .badge.sent { background: #dcfce7; color: #166534; }
.badge.failed, .badge.stopped { background: #fee2e2; color: #991b1b; }
.badge.pending { background: #f1f5f9; color: #475569; }

.progress { height: 8px; background: #eef0f5; border-radius: 99px; overflow: hidden; }
.progress > div { height: 100%; background: var(--primary); transition: width .3s; }

.preview { white-space: pre-wrap; background: #e7f8e9; border-radius: 10px; padding: 12px; font-size: 14px; }
.preview.sms { background: #eef6fd; }

.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: #1c2333; color: #fff; padding: 10px 18px; border-radius: 10px; opacity: 0; transition: opacity .2s; pointer-events: none; max-width: 90vw; }
.toast.show { opacity: 1; }

.empty { text-align: center; padding: 30px; color: var(--muted); }
.channel { font-weight: 700; }
@media (max-width: 640px) {
  .top-inner { gap: 8px; }
  .brand { flex: 1; }
  .tabs { order: 3; flex-basis: 100%; flex-wrap: nowrap; overflow-x: auto; }
}