:root {
  --paper: #F6F5F0;
  --card: #FFFFFF;
  --ink: #1C2321;
  --ink-soft: #545B57;
  --ink-faint: #8B918D;
  --teal: #24504E;
  --teal-soft: #E4EDEC;
  --alert: #B8483A;
  --alert-soft: #FBEAE7;
  --amber: #8A6516;
  --amber-soft: #F7EFDC;
  --border: #E4E1D8;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --display: 'Space Grotesk', system-ui, sans-serif;
  --body: 'Inter', system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #14181A;
    --card: #1B2124;
    --ink: #ECEAE3;
    --ink-soft: #A2AAA6;
    --ink-faint: #6E7874;
    --teal: #6FB3AE;
    --teal-soft: #1E3A38;
    --alert: #E08272;
    --alert-soft: #3A211D;
    --amber: #D6AC5C;
    --amber-soft: #33291433;
    --border: #2C3438;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 980px; margin: 0 auto; padding: 32px 20px 80px; }
.eyebrow {
  font-family: var(--mono); font-size: 11px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--teal);
}

/* ---------------------------------------------------------- login */
.login-screen {
  min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px;
}
.login-box {
  background: var(--card); border: 1px solid var(--border);
  padding: 32px; width: 100%; max-width: 360px; border-radius: 4px;
}
.login-box h1 {
  font-family: var(--display); font-size: 30px; font-weight: 700;
  margin: 4px 0 24px; letter-spacing: -.02em;
}

/* ---------------------------------------------------------- header */
header.top {
  display: flex; justify-content: space-between; align-items: flex-end;
  margin-bottom: 24px; border-bottom: 2px solid var(--ink); padding-bottom: 16px; gap: 16px;
}
.brand { display: flex; flex-direction: column; gap: 2px; }
.brand h1 {
  font-family: var(--display); font-size: 28px; font-weight: 700;
  margin: 2px 0 0; letter-spacing: -.01em;
}
.top-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.who-am-i { font-family: var(--mono); font-size: 11px; color: var(--ink-faint); }

/* ---------------------------------------------------------- buttons */
button { font-family: var(--mono); font-size: 12px; cursor: pointer; border-radius: 3px; }
.btn-primary {
  background: var(--ink); color: var(--paper); border: none; padding: 10px 16px; width: 100%;
}
.btn-primary.compact { width: auto; padding: 8px 14px; }
.btn-primary:hover { background: var(--teal); }
.btn-primary:disabled { opacity: .5; cursor: default; }
.btn-ghost {
  background: none; border: none; color: var(--ink-soft); padding: 8px 10px;
}
.btn-ghost.bordered { border: 1px solid var(--border); }
.btn-ghost:hover { color: var(--ink); }
.btn-danger {
  background: none; border: 1px solid var(--alert); color: var(--alert); padding: 9px 14px;
}
.btn-danger:hover { background: var(--alert-soft); }

/* ---------------------------------------------------------- fields */
.field { margin-bottom: 14px; }
.field label {
  display: block; font-family: var(--mono); font-size: 11px; text-transform: uppercase;
  letter-spacing: .05em; color: var(--ink-soft); margin-bottom: 5px;
}
.field label .hint { text-transform: none; letter-spacing: 0; color: var(--ink-faint); }
.field input, .field textarea, .field select,
.filters input, .filters select, .clients-toolbar input {
  width: 100%; font-family: var(--body); font-size: 14px; padding: 9px 10px;
  border: 1px solid var(--border); border-radius: 3px;
  background: var(--paper); color: var(--ink);
}
.field textarea { min-height: 64px; resize: vertical; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-status { font-family: var(--mono); font-size: 11px; margin-top: 10px; min-height: 15px; color: var(--ink-soft); }
.form-status.err { color: var(--alert); }

/* ---------------------------------------------------------- banner */
.banner {
  font-family: var(--mono); font-size: 12px; background: var(--alert-soft);
  color: var(--alert); border-left: 3px solid var(--alert);
  padding: 10px 14px; margin-bottom: 20px; cursor: pointer;
}

/* ---------------------------------------------------------- stats */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--border); border: 1px solid var(--border); margin-bottom: 28px;
}
.stat { background: var(--card); padding: 16px 18px; }
.stat .num { font-family: var(--display); font-size: 30px; font-weight: 700; line-height: 1; }
.stat.is-alert .num { color: var(--alert); }
.stat .label {
  font-family: var(--mono); font-size: 10px; text-transform: uppercase;
  letter-spacing: .08em; color: var(--ink-soft); margin-top: 6px; display: block;
}
.stat .delta { font-family: var(--mono); font-size: 10px; color: var(--ink-faint); display: block; margin-top: 3px; }
.stat .delta.up { color: var(--teal); }
.stat .delta.down { color: var(--alert); }

/* ---------------------------------------------------------- tabs */
.tabs { display: flex; margin-bottom: 20px; border-bottom: 1px solid var(--border); }
.tab {
  font-size: 12px; text-transform: uppercase; letter-spacing: .06em;
  background: none; border: none; padding: 10px 4px; margin-right: 22px;
  color: var(--ink-soft); border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.tab.active { color: var(--ink); border-bottom-color: var(--teal); }
.view { display: none; }
.view.active { display: block; }

/* ---------------------------------------------------------- filters */
.filters { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 8px; margin-bottom: 16px; }
.clients-toolbar { display: flex; gap: 8px; margin-bottom: 14px; }
.clients-toolbar input { flex: 1; }

.section-label {
  font-family: var(--mono); font-size: 11px; text-transform: uppercase;
  letter-spacing: .1em; color: var(--ink-soft); margin: 0 0 12px 2px;
}

/* ---------------------------------------------------------- threads */
.thread {
  background: var(--card); border: 1px solid var(--border);
  border-left: 4px solid var(--teal); margin-bottom: 10px;
}
.thread.needs-action { border-left-color: var(--alert); }
.thread.has-error { border-left-color: var(--amber); }
.thread-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 18px; gap: 16px; cursor: pointer;
}
.thread-row:hover { background: color-mix(in srgb, var(--teal-soft) 40%, transparent); }
.thread-main { min-width: 0; flex: 1; }
.thread-name { font-family: var(--display); font-weight: 600; font-size: 15px; }
.thread-phone { font-family: var(--mono); font-size: 12px; color: var(--ink-soft); margin-left: 8px; }
.thread-preview {
  font-size: 13px; color: var(--ink-soft); margin-top: 4px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.thread-meta { text-align: right; flex-shrink: 0; }
.thread-time { font-family: var(--mono); font-size: 11px; color: var(--ink-soft); }
.tags { margin-top: 4px; display: flex; gap: 4px; justify-content: flex-end; flex-wrap: wrap; }
.badge {
  font-family: var(--mono); font-size: 10px; text-transform: uppercase; letter-spacing: .06em;
  padding: 2px 7px; border-radius: 2px; background: var(--teal-soft); color: var(--teal);
}
.badge.alert { background: var(--alert-soft); color: var(--alert); }
.badge.warn  { background: var(--amber-soft); color: var(--amber); }
.badge.muted { background: transparent; color: var(--ink-faint); border: 1px solid var(--border); }

.thread-body { border-top: 1px solid var(--border); padding: 16px 18px 18px; display: none; }
.thread.open .thread-body { display: block; }
.thread-tools { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }

.msg { margin-bottom: 14px; }
.msg:last-child { margin-bottom: 0; }
.msg .who {
  font-family: var(--mono); font-size: 10px; text-transform: uppercase;
  letter-spacing: .08em; color: var(--ink-faint); margin-bottom: 3px;
  display: flex; gap: 8px; align-items: center;
}
.msg-text { font-size: 14px; line-height: 1.55; background: var(--paper); padding: 10px 12px; border-radius: 4px; white-space: pre-wrap; }
.msg.out .msg-text { background: var(--teal-soft); }
.msg.error .msg-text { background: var(--amber-soft); color: var(--amber); font-family: var(--mono); font-size: 12px; }
.msg.flagged .msg-text { border: 1px solid var(--alert); }

/* ---------------------------------------------------------- clients */
.client-card {
  background: var(--card); border: 1px solid var(--border); padding: 14px 18px;
  margin-bottom: 10px; display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.client-info .name { font-family: var(--display); font-weight: 600; font-size: 15px; }
.client-info .phone { font-family: var(--mono); font-size: 12px; color: var(--ink-soft); margin-left: 8px; }
.client-info .meta { font-size: 13px; color: var(--ink-soft); margin-top: 4px; }

/* ---------------------------------------------------------- activite */
.panel { background: var(--card); border: 1px solid var(--border); padding: 18px; margin-bottom: 14px; }
.spark { display: flex; align-items: flex-end; gap: 3px; height: 90px; }
.spark .bar { flex: 1; background: var(--teal); min-height: 2px; border-radius: 1px 1px 0 0; opacity: .85; }
.spark .bar[data-n="0"] { background: var(--border); }
.cat-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; font-size: 13px; }
.cat-row .cat-name { width: 130px; font-family: var(--mono); font-size: 11px; color: var(--ink-soft); }
.cat-row .cat-bar { height: 14px; background: var(--teal); border-radius: 2px; }
.cat-row .cat-n { font-family: var(--mono); font-size: 11px; color: var(--ink-soft); }
.kv { margin: 0; font-size: 13px; }
.kv div { display: flex; justify-content: space-between; padding: 7px 0; border-bottom: 1px solid var(--border); }
.kv div:last-child { border-bottom: none; }
.kv dt { color: var(--ink-soft); }
.kv dd { margin: 0; font-family: var(--mono); font-variant-numeric: tabular-nums; }
.kv-note { color: var(--ink-faint); font-size: 11px; }
.kv-footnote {
  font-size: 11.5px; color: var(--ink-faint); margin: 14px 0 0; line-height: 1.5;
}

/* ---------------------------------------------------------- modal */
.modal-backdrop {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,.5);
  align-items: center; justify-content: center; z-index: 10; padding: 16px;
}
.modal-backdrop.open { display: flex; }
.modal {
  background: var(--card); width: 100%; max-width: 460px; padding: 24px;
  border-radius: 4px; max-height: 88vh; overflow-y: auto;
}
.modal h3 { font-family: var(--display); margin: 0 0 18px; font-size: 18px; }
.modal-actions { display: flex; gap: 8px; margin-top: 18px; }
.modal-actions .btn-primary { flex: 1; }

.empty, .loading, .err {
  font-family: var(--mono); font-size: 13px; color: var(--ink-soft);
  padding: 40px 0; text-align: center;
}
.err { color: var(--alert); }

@media (max-width: 700px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .filters { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  header.top { flex-direction: column; align-items: flex-start; }
}