:root {
  --ink: #0b0b0b;
  --paper: #f3efe6;
  --soft: #6f6a63;
  --red: #d23a2a;
  --red-dark: #a92b1f;
  --line: #ddd6ca;
  --bg: #eae4d9;
  --ok: #2f7d4f;
  --warn: #9a6a12;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

button, input, select, textarea { font-family: inherit; font-size: inherit; }
button { cursor: pointer; }

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  background: var(--ink);
  color: var(--paper);
}

.top h1 { margin: 0; font-size: 15px; letter-spacing: 0.01em; }
.top .meta { font-size: 12px; color: #a8a29a; }
.top .meta b { color: var(--paper); }

.layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 16px;
  padding: 16px;
  height: calc(100dvh - 61px);
}

.list, .detail {
  background: var(--paper);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.list-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--soft);
}

.list-items { overflow-y: auto; }

.item {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  padding: 12px 16px;
  color: var(--ink);
}

.item:hover { background: #e3dccf; }
.item.is-active { background: var(--ink); color: var(--paper); }

.item-top {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: 12px;
  font-weight: 700;
}

.item-sub {
  margin-top: 4px;
  font-size: 12px;
  color: var(--soft);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.item.is-active .item-sub { color: #bdb6ab; }

.badge {
  display: inline-block;
  padding: 2px 6px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: #ded6c8;
  color: var(--ink);
}

.badge.high { background: var(--red); color: var(--paper); }
.badge.waiting_human { background: var(--warn); color: var(--paper); }
.badge.closed { background: #b9b1a4; }
.badge.waiting_client { background: var(--ok); color: var(--paper); }

.empty {
  margin: auto;
  padding: 32px;
  color: var(--soft);
  text-align: center;
}

.detail-head {
  padding: 16px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.detail-head h2 { margin: 0; font-size: 16px; }
.detail-head .sub { margin-top: 4px; font-size: 12px; color: var(--soft); }

.sla {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 8px;
  background: #ded6c8;
}

.sla.overdue { background: var(--red); color: var(--paper); }

.lead {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px 16px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  color: var(--soft);
}

.lead b { color: var(--ink); font-weight: 600; }

.thread {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 16px;
}

.msg { margin-bottom: 12px; max-width: 78%; }
.msg .who { font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--soft); margin-bottom: 3px; }
.msg .text { padding: 10px 12px; background: #e3dccf; white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.client { margin-left: auto; }
.msg.client .text { background: var(--ink); color: var(--paper); }
.msg.human .text { background: #cfe0d3; }
.msg.system { max-width: 100%; }
.msg.system .text { background: transparent; padding: 0; font-size: 12px; color: var(--soft); text-align: center; }

.reply {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
}

.reply textarea {
  width: 100%;
  min-height: 64px;
  resize: vertical;
  border: 1px solid var(--line);
  background: #fff;
  padding: 10px;
}

.row { display: flex; gap: 8px; align-items: center; margin-top: 8px; }

.btn {
  border: 0;
  background: var(--red);
  color: var(--paper);
  padding: 10px 14px;
  font-weight: 700;
  font-size: 12px;
}

.btn:hover { background: var(--red-dark); }
.btn.secondary { background: var(--ink); }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }

.invoice {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  background: #e3dccf;
}

.invoice h3 { margin: 0 0 8px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--soft); }

.invoice .fields { display: grid; grid-template-columns: 110px 1fr 120px auto; gap: 8px; }

.invoice input, .invoice select {
  border: 1px solid var(--line);
  background: #fff;
  padding: 9px;
}

.result { margin-top: 8px; font-size: 12px; overflow-wrap: anywhere; }
.result a { color: var(--red-dark); }

.login {
  position: fixed;
  inset: 0;
  background: rgba(11, 11, 11, 0.9);
  display: grid;
  place-items: center;
  padding: 20px;
  z-index: 10;
}

.login form {
  width: min(420px, 100%);
  background: var(--paper);
  padding: 24px;
}

.login h2 { margin: 0 0 6px; font-size: 18px; }
.login p { margin: 0 0 16px; color: var(--soft); font-size: 13px; }
.login input { width: 100%; border: 1px solid var(--line); padding: 11px; background: #fff; }
.login .btn { width: 100%; margin-top: 10px; }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; height: auto; }
  .list { max-height: 40dvh; }
  .detail { min-height: 60dvh; }
  .invoice .fields { grid-template-columns: 1fr 1fr; }
  .lead { grid-template-columns: 1fr 1fr; }
}