:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface-2: #f8f9fb;
  --line: #e3e6eb;
  --text: #1b2230;
  --muted: #667085;
  --brand: #1f3a5f;
  --brand-ink: #ffffff;
  --accent: #0f9d6b;
  --accent-soft: #e5f6ef;
  --warn: #c2410c;
  --warn-soft: #fff1e7;
  --danger: #c62828;
  --danger-soft: #fdecec;
  --info: #1d6fd6;
  --info-soft: #e8f1fd;
  --bubble-in: #ffffff;
  --bubble-out: #dcf5e8;
  --bubble-note: #fff6d6;
  --chat-bg: #eef1f4;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f141b; --surface: #171e27; --surface-2: #1c2430; --line: #2a3441; --text: #e6e9ee; --muted: #93a0b2;
    --brand: #8fb4e6; --brand-ink: #0f141b; --accent: #34c28d; --accent-soft: #143328;
    --warn: #f59e5b; --warn-soft: #3a2415; --danger: #f07070; --danger-soft: #3a1818; --info: #74a9f0; --info-soft: #172a45;
    --bubble-in: #1f2833; --bubble-out: #16392b; --bubble-note: #3a3217; --chat-bg: #121820;
    --shadow: 0 1px 2px rgba(0,0,0,.4);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--text); font: 15px/1.45 var(--font); -webkit-font-smoothing: antialiased; }
a { color: var(--info); }
h1, h2, h3 { margin: 0; line-height: 1.2; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

/* ---------- Controles ---------- */
label.field { display: block; margin-bottom: 14px; }
label.field > span { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
input, select, textarea {
  width: 100%; font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--line);
  border-radius: 10px; padding: 10px 12px; outline: none; transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus { border-color: var(--brand); box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand) 18%, transparent); }
textarea { resize: vertical; min-height: 110px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; font: inherit; font-weight: 600;
  border: 1px solid transparent; border-radius: 10px; padding: 10px 16px; cursor: pointer; background: var(--brand); color: var(--brand-ink);
  transition: filter .15s, background .15s; white-space: nowrap; text-decoration: none;
}
.btn:hover { filter: brightness(1.08); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.block { width: 100%; }
.btn.accent { background: var(--accent); color: #fff; }
.btn.ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn.ghost:hover { background: var(--surface-2); filter: none; }
.btn.danger { background: transparent; color: var(--danger); border-color: color-mix(in srgb, var(--danger) 35%, transparent); }
.btn.sm { padding: 6px 10px; font-size: 13px; border-radius: 8px; }
.icon-btn { background: none; border: 0; cursor: pointer; color: var(--muted); padding: 6px; border-radius: 8px; display: inline-flex; }
.icon-btn:hover { background: var(--surface-2); color: var(--text); }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.error-box { background: var(--danger-soft); color: var(--danger); border-radius: 10px; padding: 10px 12px; margin-bottom: 12px; font-size: 14px; }
.ok-box { background: var(--accent-soft); color: var(--accent); border-radius: 10px; padding: 10px 12px; margin-bottom: 12px; font-size: 14px; }

/* ---------- Status / prioridade ---------- */
.badge { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; padding: 3px 9px; border-radius: 999px; white-space: nowrap; }
.badge::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.st-aberto { background: var(--info-soft); color: var(--info); }
.st-em_atendimento { background: var(--accent-soft); color: var(--accent); }
.st-aguardando_usuario { background: var(--warn-soft); color: var(--warn); }
.st-resolvido { background: var(--surface-2); color: var(--muted); }
.st-cancelado { background: var(--danger-soft); color: var(--danger); }
.pr { font-size: 12px; font-weight: 700; letter-spacing: .02em; text-transform: uppercase; }
.pr-baixa { color: var(--muted); }
.pr-normal { color: var(--info); }
.pr-alta { color: var(--warn); }
.pr-urgente { color: var(--danger); }

/* ---------- Chat ---------- */
.chat { background: var(--chat-bg); padding: 16px; overflow-y: auto; display: flex; flex-direction: column; gap: 8px; }
.msg { max-width: min(78%, 620px); padding: 8px 12px 6px; border-radius: 12px; box-shadow: var(--shadow); word-wrap: break-word; white-space: pre-wrap; }
.msg .meta { font-size: 11px; color: var(--muted); margin-top: 4px; display: flex; gap: 6px; justify-content: flex-end; align-items: center; }
.msg .who { font-size: 12px; font-weight: 700; margin-bottom: 2px; color: var(--brand); }
.msg.in { align-self: flex-start; background: var(--bubble-in); border-top-left-radius: 4px; }
.msg.out { align-self: flex-end; background: var(--bubble-out); border-top-right-radius: 4px; }
.msg.note { align-self: flex-end; background: var(--bubble-note); border: 1px dashed color-mix(in srgb, var(--warn) 45%, transparent); }
.msg.system { align-self: center; background: transparent; box-shadow: none; font-size: 12px; color: var(--muted); padding: 2px 10px; text-align: center; white-space: normal; }
.msg.system span { background: var(--surface); border-radius: 10px; padding: 3px 10px; display: inline-block; max-width: 520px; }
.msg .failed { color: var(--danger); font-weight: 600; }
.atts { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.att { display: inline-flex; align-items: center; gap: 6px; background: var(--surface-2); border: 1px solid var(--line); border-radius: 8px; padding: 5px 8px; font-size: 13px; text-decoration: none; color: var(--text); max-width: 240px; }
.att span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.att-img { display: block; max-width: 240px; max-height: 200px; border-radius: 8px; border: 1px solid var(--line); }
.day-sep { align-self: center; font-size: 12px; color: var(--muted); margin: 6px 0; }

.composer { border-top: 1px solid var(--line); background: var(--surface); padding: 10px 12px; }
.composer textarea { min-height: 44px; max-height: 180px; resize: none; }
.composer .row { display: flex; gap: 8px; align-items: flex-end; }
.composer .files { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.chip { display: inline-flex; align-items: center; gap: 6px; background: var(--surface-2); border: 1px solid var(--line); border-radius: 999px; padding: 3px 6px 3px 10px; font-size: 12px; }
.chip button { border: 0; background: none; cursor: pointer; color: var(--muted); font-size: 14px; line-height: 1; }

.spinner { width: 18px; height: 18px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .7s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 10px; font-size: 14px; z-index: 99; box-shadow: var(--shadow); max-width: calc(100% - 32px); }