:root {
  /* Aithena brand palette (sourced from aithena.sg). */
  --bg: #eff2f6;          /* --background */
  --card: #ffffff;        /* --card */
  --ink: #020817;         /* --foreground */
  --muted: #64748b;       /* --muted-foreground */
  --line: #e2e8f0;        /* --border */
  --brand: #3390db;       /* --primary */
  --brand-dark: #287abd;  /* --accent (hover) */
  --brand-ink: #ffffff;   /* --primary-foreground */
  --ok-bg: #ecfdf3; --ok-ink: #008a2e;
  --err-bg: #fff0f0; --err-ink: #e60000;
  --warn-bg: #fffcf0; --warn-ink: #dc7609;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.55 "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 23px; letter-spacing: -.01em; margin: 0 0 4px; }
h2 { font-size: 15px; letter-spacing: .01em; margin: 34px 0 10px; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; border-radius: 4px; }
.muted { color: var(--muted); }
.mono { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 12px; }
.nowrap { white-space: nowrap; }

.topbar { display: flex; align-items: center; gap: 20px; background: var(--card);
  border-bottom: 1px solid var(--line); padding: 11px 24px; position: sticky; top: 0; z-index: 10;
  box-shadow: 0 1px 3px rgba(2,8,23,.04); }
.brand { display: flex; align-items: center; }
.brand img { height: 28px; width: auto; display: block; }
.brand .sep { margin: 0 10px; color: var(--line); }
.brand .ctx { font-weight: 600; color: var(--muted); font-size: 14px; }
.topbar nav { display: flex; gap: 2px; flex: 1; }
.topbar nav a { padding: 6px 12px; border-radius: 7px; color: var(--muted); font-weight: 500; transition: background .12s, color .12s; }
.topbar nav a:hover { background: var(--bg); color: var(--ink); text-decoration: none; }
.topbar nav a.active { background: var(--brand); color: var(--brand-ink); }
.logout button { background: none; border: 1px solid var(--line); border-radius: 6px;
  padding: 6px 12px; cursor: pointer; color: var(--muted); }

/* Environment switcher (dev / prod) */
.envswitch { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.env-btn { background: var(--card); border: none; padding: 6px 12px; cursor: pointer;
  font: inherit; font-size: 13px; font-weight: 600; color: var(--muted); border-left: 1px solid var(--line); }
.env-btn:first-child { border-left: none; }
.env-btn:disabled { opacity: .4; cursor: not-allowed; }
.env-dev.on { background: #e4f1fb; color: #1c5a8a; }
.env-prod.on { background: var(--err-ink); color: #fff; }
.prodbar { background: var(--err-ink); color: #fff; text-align: center;
  padding: 6px 12px; font-size: 13px; font-weight: 600; letter-spacing: .02em; }

main { max-width: 1040px; margin: 0 auto; padding: 24px; }

.flash { padding: 11px 14px; border-radius: 9px; margin-bottom: 16px; font-weight: 500;
  border: 1px solid transparent; }
.flash.ok { background: var(--ok-bg); color: var(--ok-ink); border-color: #bffcd9; }
.flash.error { background: var(--err-bg); color: var(--err-ink); border-color: #ffe0e1; }
.flash.warn { background: var(--warn-bg); color: var(--warn-ink); border-color: #fbeeb1; }

.filters { display: flex; gap: 8px; margin: 16px 0; }
input, select, textarea, button { font: inherit; }
input[type=text], input[type=search], input[type=email], select, textarea {
  padding: 8px 11px; border: 1px solid var(--line); border-radius: 8px; background: var(--card); width: 100%;
  transition: border-color .12s, box-shadow .12s; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(51,144,219,.15); }
.filters input, .filters select { width: auto; }
button { cursor: pointer; border: 1px solid var(--line); background: var(--card);
  border-radius: 8px; padding: 8px 14px; transition: background .12s, border-color .12s, box-shadow .12s; }
button:hover { border-color: #cbd5e1; }
button.primary, .filters button { background: var(--brand); color: var(--brand-ink); border-color: var(--brand);
  box-shadow: 0 1px 2px rgba(51,144,219,.25); }
button.primary:hover, .filters button:hover { background: var(--brand-dark); border-color: var(--brand-dark); }
button.danger { color: var(--err-ink); border-color: var(--err-bg); }

table { width: 100%; border-collapse: collapse; background: var(--card);
  border: 1px solid var(--line); border-radius: 11px; overflow: hidden; box-shadow: 0 1px 2px rgba(2,8,23,.04); }
th, td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); }
th { font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 600; background: #fafbfd; }
tbody tr { transition: background .1s; }
tbody tr:hover { background: #f7f9fc; }
tr:last-child td { border-bottom: none; }
.empty { text-align: center; color: var(--muted); padding: 28px; }
.empty:hover { background: none; }
.pager { display: flex; gap: 16px; margin: 16px 0; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge.trial_active { background: #e4f1fb; color: #1c5a8a; }
.badge.trial_ended  { background: #fef3c7; color: #92400e; }
.badge.converted    { background: #dcfce7; color: #166534; }
.yes { color: var(--ok-ink); font-weight: 600; }
.no  { color: var(--err-ink); font-weight: 600; }
.warn { color: var(--warn-ink); font-weight: 600; font-size: 12px; }

.tabs { display: flex; gap: 8px; margin: 16px 0; }
.tab { padding: 10px 16px; border: 1px solid var(--line); border-radius: 10px; background: var(--card); color: var(--ink); }
.tab.active { border-color: var(--brand); box-shadow: inset 0 -2px 0 var(--brand); }
.tab .count { display: inline-block; margin-left: 6px; background: var(--bg); border-radius: 999px; padding: 1px 8px; font-size: 12px; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; margin-top: 16px; }
.card { display: block; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; color: var(--ink); }
.card:hover { border-color: var(--brand); text-decoration: none; }
.card-head { display: flex; justify-content: space-between; margin-bottom: 8px; }
.card-desc { color: var(--muted); font-size: 13px; }
.card-sub { margin-top: 10px; font-weight: 600; }
.card-meta { margin-top: 6px; font-size: 12px; color: var(--muted); }

.crumb { margin: 0 0 8px; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.facts .k { display: block; font-size: 12px; text-transform: uppercase; color: var(--muted); letter-spacing: .04em; }

.editor { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: start; margin-top: 16px; }
.edit-form label, .test-form label, .preview-controls label { display: block; margin-bottom: 12px; font-size: 13px; color: var(--muted); }
.edit-form input, .edit-form textarea { margin-top: 4px; color: var(--ink); }
.edit-form textarea { font-family: ui-monospace, Menlo, monospace; font-size: 13px; }
.hint code, code { background: var(--bg); padding: 1px 5px; border-radius: 5px; font-size: 13px; }
.actions { display: flex; gap: 10px; }
.preview-pane { position: sticky; top: 16px; }
.preview-controls { display: flex; gap: 10px; align-items: end; margin-bottom: 8px; }
.preview-controls label { flex: 1; margin: 0; }
#preview { width: 100%; height: 420px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.test-form { display: flex; gap: 10px; align-items: end; margin-top: 12px;
  border-top: 1px solid var(--line); padding-top: 12px; }
.test-form label { flex: 1; margin: 0; }

.login-card { max-width: 340px; margin: 12vh auto; background: var(--card);
  border: 1px solid var(--line); border-radius: 14px; padding: 28px; }
.login-logo { height: 34px; width: auto; display: block; margin-bottom: 20px; }
.login-card h1 { margin-bottom: 4px; font-size: 20px; }
.login-card form { display: flex; flex-direction: column; gap: 12px; margin-top: 16px; }

/* Segment pills in the customer list */
.seg { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.seg-in_trial   { background: #e4f1fb; color: #1c5a8a; }
.seg-trial_ended{ background: #fef3c7; color: #92400e; }
.seg-subscribed { background: #dcfce7; color: #166534; }
.seg-lapsed_paid{ background: #ede9fe; color: #5b21b6; }
.seg-no_trial   { background: #f1f5f9; color: #64748b; }

/* CRM section */
.crm-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: start; }
.crm-box { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.crm-box label { display: block; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); margin-bottom: 6px; }
.inline-form { display: flex; gap: 8px; align-items: center; margin-bottom: 16px; }
.inline-form input { flex: 1; }
.tags-block { margin-top: 4px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.chip { display: inline-flex; align-items: center; gap: 4px; background: var(--brand); color: #fff;
  border-radius: 999px; padding: 2px 6px 2px 10px; font-size: 13px; }
.chip form { display: inline; }
.chip button { background: none; border: none; color: #fff; cursor: pointer; padding: 0 2px; font-size: 15px; line-height: 1; }
.notes { list-style: none; padding: 0; margin: 12px 0 0; }
.notes li { border-top: 1px solid var(--line); padding: 10px 0; }
.note-body { white-space: pre-wrap; }
.note-meta { display: flex; gap: 8px; align-items: center; font-size: 12px; color: var(--muted); margin-top: 4px; }
.note-meta form { display: inline; }
.note-meta button { background: none; border: none; color: var(--err-ink); cursor: pointer; font-size: 12px; padding: 0; }
.crm-box textarea { width: 100%; margin-bottom: 8px; }

details.subtle { margin: 8px 0 0; }
details.subtle summary { cursor: pointer; color: var(--muted); font-size: 13px; }
table.mini { margin-top: 8px; max-width: 380px; }
table.mini td { padding: 6px 10px; }

/* Send feature */
.btn-small { font-size: 13px; padding: 4px 10px; }
.send-form fieldset { border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; margin: 0 0 16px; }
.send-form legend { font-weight: 600; padding: 0 8px; color: var(--muted); }
.send-form label { display: block; margin: 10px 0; }
.send-form label.radio { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.send-form .indent { margin: 0 0 12px 26px; }
.send-form select, .send-form input[type=text], .send-form textarea { margin-top: 4px; }
.send-form textarea { font-family: var(--mono, monospace); font-size: 13px; }
.custom-send label { display: block; margin: 10px 0; }
.custom-send textarea { font-family: monospace; font-size: 13px; }

/* Automation — settings + status */
.auto-status { display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-radius: 10px;
  margin: 14px 0 18px; font-size: 14px; border: 1px solid var(--line); }
.auto-status .dot { width: 10px; height: 10px; border-radius: 50%; flex: none; }
.auto-status.on { background: var(--ok-bg); border-color: #bffcd9; }
.auto-status.on .dot { background: var(--ok-ink); box-shadow: 0 0 0 3px rgba(0,138,46,.15); }
.auto-status.off { background: #f8fafc; }
.auto-status.off .dot { background: var(--muted); }
.auto-status .spacer { flex: 1; }
.auto-cols { display: grid; grid-template-columns: 1.4fr 1fr; gap: 16px; align-items: start; margin-bottom: 8px; }
.settings-body { padding: 16px; display: flex; flex-direction: column; gap: 14px; }
.settings-body label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.switch-row { flex-direction: row !important; align-items: center; gap: 10px !important; font-size: 15px !important; color: var(--ink) !important; font-weight: 600; }
.switch-row input { width: 18px; height: 18px; accent-color: var(--brand); }
.inline-num { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); font-size: 15px; }
.inline-num input { width: 90px; }
.settings-body .hint { color: var(--muted); font-size: 12px; }
.settings-body .primary { align-self: flex-start; }
.run-panel .danger-solid:disabled { opacity: .5; }

/* Automation — next sweep preview */
.auto-config { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.auto-config .cfg { background: var(--card); border: 1px solid var(--line); border-radius: 999px;
  padding: 4px 12px; font-size: 13px; color: var(--muted); }
.auto-summary { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; background: var(--card);
  border: 1px solid var(--line); border-left: 3px solid var(--brand); border-radius: 10px;
  padding: 14px 16px; margin-bottom: 16px; }
.auto-total { font-size: 16px; }
.auto-total strong { font-size: 20px; }
.auto-breakdown { display: flex; gap: 14px; flex: 1; }
.auto-breakdown .ab { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; }
.auto-note { margin-top: 16px; padding: 12px 14px; background: #fafbfd; border: 1px solid var(--line);
  border-radius: 10px; font-size: 13px; color: var(--muted); }
.auto-note .badge { vertical-align: middle; }

/* Send page — filterable checklist */
.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 10px; }
.filter-bar #f-search { flex: 1; min-width: 220px; }
.filter-bar select { width: auto; }
.filter-bar .chk { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); white-space: nowrap; }
.filter-bar .chk input { width: auto; }
.list-toolbar { display: flex; align-items: center; gap: 12px; padding: 8px 2px; font-size: 13px; color: var(--muted); }
.list-toolbar .spacer { flex: 1; }
.candidate-list { border: 1px solid var(--line); border-radius: 10px; max-height: 460px; overflow-y: auto; background: var(--card); }
.cand { display: grid; grid-template-columns: 18px 1fr auto; align-items: center; gap: 10px;
  padding: 8px 14px; border-bottom: 1px solid var(--line); cursor: pointer; }
.cand:last-child { border-bottom: none; }
.cand:hover { background: #f7f9fc; }
.cand input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--brand); }
.cand-main { min-width: 0; display: flex; gap: 8px; align-items: baseline; }
.cand-email { font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cand-name { font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cand-meta { display: flex; gap: 6px; align-items: center; }
.chip-no { background: var(--err-bg); color: var(--err-ink); border-radius: 999px; padding: 1px 8px; font-size: 11px; font-weight: 600; }
.chip-sent { background: #f1f5f9; color: var(--muted); border-radius: 999px; padding: 1px 8px; font-size: 11px; font-weight: 600; }
/* Marks anyone who has ever paid us — the people to be most careful with. */
.chip-paid { background: #ede9fe; color: #5b21b6; border-radius: 999px; padding: 1px 8px; font-size: 11px; font-weight: 600; }
/* Compose one follow-up by hand */
.compose-form { display: grid; gap: 14px; max-width: 760px; margin: 16px 0 24px; }
.compose-form input[type=text] { width: 100%; }
.compose-form textarea { width: 100%; font-family: var(--mono, monospace); font-size: 13px; }
.compose-form .actions { display: flex; gap: 12px; align-items: center; }

/* Follow-ups page */
.settings-form { display: grid; gap: 12px; max-width: 560px; margin: 0 0 24px; }
.settings-form input[type=number] { width: 72px; }
.settings-form .hint { display: block; margin: 2px 0 0; }
p.warn { background: var(--warn-bg); color: var(--warn-ink); border: 1px solid #fbeeb1;
         border-radius: 8px; padding: 12px 14px; font-size: 14px; font-weight: 400; }

/* Usage signals — counts and recency only, never query content. */
.chip-use   { background: #e4f1fb; color: #1c5a8a; border-radius: 999px; padding: 1px 8px; font-size: 11px; font-weight: 600; }
.chip-quiet { background: #f1f5f9; color: #64748b; border-radius: 999px; padding: 1px 8px; font-size: 11px; font-weight: 600; }
.chip-empty { background: #fef3c7; color: #92400e; border-radius: 999px; padding: 1px 8px; font-size: 11px; font-weight: 600; }
.send-warn:empty { display: none; }
.send-warn { margin: 12px 0 0; padding: 10px 14px; border-radius: 8px;
             background: var(--err-bg); color: var(--err-ink); font-size: 14px;
             border: 1px solid currentColor; }
.send-what .indent, .send-who .indent { margin: 8px 0 12px 26px; }
.send-what legend, .send-who legend { font-weight: 600; padding: 0 8px; color: var(--muted); }
.send-what, .send-who { border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; margin: 0 0 16px; }
.send-what label.radio { display: flex; align-items: center; gap: 8px; font-weight: 600; margin: 6px 0; }

.confirm-summary { background: var(--card); border: 1px solid var(--line); border-left: 3px solid var(--brand);
  border-radius: 10px; padding: 14px 16px; margin: 12px 0 16px; }
.confirm-summary .muted { display: block; margin-top: 4px; }

.send-review { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: start; }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
  box-shadow: 0 1px 2px rgba(2,8,23,.04); }
.panel-head { display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-bottom: 1px solid var(--line); background: #fafbfd; }
.panel-head h2 { margin: 0; font-size: 14px; }
.recip-tools { display: flex; align-items: center; gap: 10px; font-size: 13px; }
.recip-tools .selcount { color: var(--muted); }
.link-btn { background: none; border: none; color: var(--brand); cursor: pointer; font: inherit; font-size: 13px; padding: 2px 4px; }
.link-btn:hover { text-decoration: underline; }
.recip-list { max-height: 420px; overflow-y: auto; }
.recip { display: grid; grid-template-columns: 20px 1fr auto; align-items: center; gap: 10px;
  padding: 9px 16px; border-bottom: 1px solid var(--line); cursor: pointer; }
.recip:last-child { border-bottom: none; }
.recip:hover { background: #f7f9fc; }
.recip input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--brand); }
.recip-email { font-weight: 500; overflow: hidden; text-overflow: ellipsis; }
.recip-name { font-size: 13px; text-align: right; }
.recip:has(input:not(:checked)) { opacity: .45; }
.recip:has(input:not(:checked)) .recip-email { text-decoration: line-through; }
.preview-body { padding: 14px 16px; }
.preview-subject { margin: 0 0 10px; }
#preview { width: 100%; height: 360px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }

.confirm-bar { display: flex; align-items: center; gap: 16px; margin-top: 20px; }
.btn-ghost-link { color: var(--muted); }
.danger-solid { background: var(--err-ink); color: #fff; border: 1px solid var(--err-ink);
  border-radius: 8px; padding: 10px 20px; font: inherit; font-weight: 600; cursor: pointer;
  box-shadow: 0 1px 2px rgba(230,0,0,.25); }
.danger-solid:hover { background: #c40000; }
.danger-solid:disabled { opacity: .5; cursor: default; box-shadow: none; }

@media (max-width: 820px) { .editor, .crm-grid, .send-review { grid-template-columns: 1fr; } .preview-pane { position: static; } }