:root {
  --pink: #fb3fa5;
  --pink-dark: #e1308f;
  --ink: #16121f;
  --bg: #f6f5f8;
  --card: #ffffff;
  --muted-red: #e02d2d;
  --green: #19a05c;
  --radius: 14px;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font: 15px/1.45 -apple-system, "Segoe UI", Roboto, "Noto Sans Arabic", sans-serif;
  background: var(--bg); color: var(--ink);
}
.hidden { display: none !important; }
.screen { min-height: 100dvh; }

/* ---------- login ---------- */
#login { display: grid; place-items: center; background: linear-gradient(160deg, #241852, #0e0518); }
.login-card {
  background: var(--card); padding: 32px 28px; border-radius: 20px; width: min(92vw, 340px);
  text-align: center; box-shadow: 0 20px 60px rgba(0,0,0,.45);
}
.login-card .logo { font-size: 40px; }
.login-card h1 { margin: 8px 0 2px; font-size: 20px; }
.login-card .sub { margin: 0 0 18px; color: #777; font-size: 13px; }
.login-card input {
  width: 100%; padding: 12px 14px; border: 1px solid #ddd; border-radius: 10px; font-size: 15px;
}
.login-card button {
  width: 100%; margin-top: 12px; padding: 12px; border: 0; border-radius: 10px;
  background: linear-gradient(135deg, var(--pink), var(--pink-dark)); color: #fff; font-weight: 700; font-size: 15px;
}
.error { color: var(--muted-red); font-size: 13px; }

/* ---------- header ---------- */
header {
  position: sticky; top: 0; z-index: 5; display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; background: linear-gradient(135deg, #241852, #0e0518); color: #fff;
}
.brand { display: flex; align-items: center; gap: 10px; }
.logo-sm { font-size: 22px; }
.brand small { display: block; opacity: .65; font-size: 11px; }
.icon-btn { background: rgba(255,255,255,.12); border: 0; color: inherit; font-size: 17px; border-radius: 10px; padding: 7px 11px; }

/* ---------- settings ---------- */
.settings { background: var(--card); margin: 10px 12px; padding: 14px; border-radius: var(--radius); box-shadow: 0 2px 10px rgba(0,0,0,.06); }
.settings .row { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; font-size: 14px; }
.settings input[type="number"] { padding: 6px 8px; border: 1px solid #ddd; border-radius: 8px; }
.settings button { border: 0; background: var(--ink); color: #fff; border-radius: 9px; padding: 8px 16px; font-weight: 600; }

/* ---------- conversation list ---------- */
.list { padding: 10px 12px 30px; display: grid; gap: 8px; }
.conv {
  display: flex; gap: 12px; align-items: center; background: var(--card); border-radius: var(--radius);
  padding: 12px 14px; cursor: pointer; box-shadow: 0 1px 6px rgba(0,0,0,.05); border: 1px solid transparent;
}
.conv:hover { border-color: #f0c4dd; }
.conv .avatar {
  width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center; flex: none;
  background: linear-gradient(135deg, var(--pink), var(--pink-dark)); color: #fff; font-weight: 700;
}
.conv.is-muted .avatar { background: #999; }
.conv .body { min-width: 0; flex: 1; }
.conv .top { display: flex; justify-content: space-between; gap: 8px; }
.conv .name { font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.conv .time { color: #999; font-size: 12px; flex: none; }
.conv .preview { color: #666; font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; unicode-bidi: plaintext; }
.conv .preview .you { color: var(--pink-dark); font-weight: 600; }
.badge {
  flex: none; font-size: 11px; font-weight: 700; border-radius: 999px; padding: 4px 9px;
  background: #fdecec; color: var(--muted-red);
}
.badge.on { background: #e7f7ee; color: var(--green); }
.empty { text-align: center; color: #999; padding: 50px 20px; }

/* ---------- thread ---------- */
.thread { position: fixed; inset: 0; background: var(--bg); display: flex; flex-direction: column; z-index: 10; }
.thread-head {
  display: flex; align-items: center; gap: 10px; padding: 10px 14px;
  background: linear-gradient(135deg, #241852, #0e0518); color: #fff;
}
.thread-title { flex: 1; min-width: 0; }
.thread-title small { display: block; opacity: .65; font-size: 11px; }
.mute-bar {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 10px 14px; background: var(--card); border-bottom: 1px solid #eee;
}
.mute-label { font-size: 13px; color: #555; font-weight: 600; }
.mute-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.mute-actions button {
  border: 1px solid #e2d3dd; background: #fff; border-radius: 999px; padding: 6px 12px; font-size: 13px; font-weight: 600;
}
.mute-actions button.danger { background: var(--muted-red); border-color: var(--muted-red); color: #fff; }
.mute-actions button.go { background: var(--green); border-color: var(--green); color: #fff; }
.messages { flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 6px; }
.msg {
  max-width: 78%; padding: 8px 12px; border-radius: 14px; font-size: 14px;
  white-space: pre-wrap; word-break: break-word; unicode-bidi: plaintext;
}
.msg.in { align-self: flex-start; background: #fff; border: 1px solid #eee; border-bottom-left-radius: 4px; }
.msg.out { align-self: flex-end; background: linear-gradient(135deg, var(--pink), var(--pink-dark)); color: #fff; border-bottom-right-radius: 4px; }
.msg .meta { display: block; font-size: 10px; opacity: .6; margin-top: 3px; text-align: end; }