/* rkhfamily — dark, mobile-first */
:root {
  --bg: #0e1116;
  --bg-2: #161b22;
  --bg-3: #1c232c;
  --border: #2a323d;
  --text: #e7ecf3;
  --muted: #8b98a9;
  --accent: #2f81f7;
  --accent-2: #1f6feb;
  --danger: #ff7b72;
  --ok: #3fb950;
  --radius: 14px;
  --tap: 44px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
/* The hidden attribute must always win over layout rules like `display: grid`. */
[hidden] { display: none !important; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  overscroll-behavior-y: none;
}
button, input, textarea, select { font: inherit; color: inherit; }
a { color: var(--accent); }

.app { display: flex; flex-direction: column; min-height: 100dvh; }
@media (min-width: 900px) {
  .topbar, .view { max-width: 980px; width: 100%; margin-left: auto; margin-right: auto; }
  .bottomnav { max-width: 980px; margin-left: auto; margin-right: auto; }
}
.view { flex: 1; padding: 14px 14px calc(84px + env(safe-area-inset-bottom)); }
.view.nonav { padding-bottom: calc(16px + env(safe-area-inset-bottom)); }

.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 10px;
  padding: calc(8px + env(safe-area-inset-top)) 12px 8px;
  background: rgba(14,17,22,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.topbar-title { font-weight: 600; font-size: 17px; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.topbar-actions { display: flex; gap: 6px; align-items: center; }
.icon-btn {
  min-width: var(--tap); height: var(--tap); border: 0; background: transparent;
  border-radius: 10px; cursor: pointer; font-size: 18px; display: grid; place-items: center;
}
.icon-btn:hover { background: var(--bg-3); }

.bottomnav {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
  display: grid; grid-template-columns: repeat(3, 1fr);
  background: rgba(22,27,34,.96);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
  padding-bottom: env(safe-area-inset-bottom);
}
.nav-btn {
  border: 0; background: transparent; color: var(--muted); padding: 8px 0 10px;
  display: flex; flex-direction: column; align-items: center; gap: 3px; font-size: 11px; cursor: pointer;
}
.nav-btn span { font-size: 20px; line-height: 1; }
.nav-btn.active { color: var(--accent); }

.card {
  background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; margin-bottom: 12px;
}
.card h2 { margin: 0 0 12px; font-size: 16px; }
.muted { color: var(--muted); font-size: 13px; }
.center { display: grid; place-items: center; min-height: 70dvh; }
.stack { display: flex; flex-direction: column; gap: 10px; }
.row { display: flex; gap: 10px; align-items: center; }
.spacer { flex: 1; }

label.fld { display: block; margin-bottom: 10px; }
label.fld > span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
input[type=text], input[type=password], input[type=search], input[type=number], textarea, select {
  width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--bg); outline: none;
}
input:focus, textarea:focus, select:focus { border-color: var(--accent); }

.btn {
  border: 1px solid var(--border); background: var(--bg-3); color: var(--text);
  padding: 12px 16px; border-radius: 10px; cursor: pointer; min-height: var(--tap);
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-weight: 500;
}
.btn:hover { filter: brightness(1.12); }
.btn:disabled { opacity: .55; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.danger { background: transparent; border-color: var(--danger); color: var(--danger); }
.btn.sm { padding: 7px 11px; min-height: 36px; font-size: 14px; }
.btn.block { width: 100%; }

.msg-line { font-size: 14px; min-height: 20px; margin-top: 10px; }
.msg-line.err { color: var(--danger); }
.msg-line.ok { color: var(--ok); }

/* files */
.toolbar { display: flex; gap: 8px; margin-bottom: 12px; align-items: center; }
.chips { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 8px; margin-bottom: 6px; scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chip {
  white-space: nowrap; border: 1px solid var(--border); background: var(--bg-2); color: var(--muted);
  padding: 6px 12px; border-radius: 999px; font-size: 13px; cursor: pointer;
}
.chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.file-row {
  display: flex; align-items: center; gap: 12px; padding: 10px 12px;
  background: var(--bg-2); border: 1px solid var(--border); border-radius: 12px; margin-bottom: 8px;
  cursor: pointer;
}
.file-row:active { background: var(--bg-3); }
.file-ic {
  width: 42px; height: 42px; border-radius: 10px; background: var(--bg-3);
  display: grid; place-items: center; font-size: 19px; flex: 0 0 auto; overflow: hidden;
}
.file-ic img { width: 100%; height: 100%; object-fit: cover; }
.file-meta { flex: 1; min-width: 0; }
.file-name { font-size: 15px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-sub { font-size: 12px; color: var(--muted); }

.drop {
  border: 1.5px dashed var(--border); border-radius: var(--radius); padding: 22px;
  text-align: center; color: var(--muted); margin-bottom: 12px;
}
.drop.over { border-color: var(--accent); color: var(--accent); }
.progress { height: 6px; background: var(--bg-3); border-radius: 999px; overflow: hidden; margin-top: 10px; }
.progress > div { height: 100%; background: var(--accent); width: 0; transition: width .2s; }

/* chat */
.chat-list-item { display: flex; gap: 12px; align-items: center; padding: 12px; border-radius: 12px; background: var(--bg-2); border: 1px solid var(--border); margin-bottom: 8px; cursor: pointer; }
.badge { background: var(--accent); color: #fff; border-radius: 999px; font-size: 12px; padding: 2px 8px; min-width: 22px; text-align: center; }

.conv { display: flex; flex-direction: column; height: calc(100dvh - 150px - env(safe-area-inset-bottom)); }
.conv-scroll { flex: 1; overflow-y: auto; padding: 4px 0 10px; display: flex; flex-direction: column; gap: 8px; }
.bubble { max-width: 82%; padding: 9px 13px; border-radius: 16px; background: var(--bg-2); border: 1px solid var(--border); align-self: flex-start; word-break: break-word; }
.bubble.me { align-self: flex-end; background: var(--accent-2); border-color: var(--accent-2); }
.bubble .who { font-size: 11px; color: var(--muted); margin-bottom: 3px; }
.bubble.me .who { color: #d7e6ff; }
.bubble .when { font-size: 10px; color: var(--muted); margin-top: 4px; text-align: right; }
.bubble.me .when { color: #cfe0ff; }
.bubble img, .bubble video { max-width: 100%; border-radius: 10px; display: block; }
.bubble audio { width: 100%; min-width: 180px; }
.composer { display: flex; gap: 8px; align-items: flex-end; padding-top: 8px; }
.composer textarea { flex: 1; resize: none; max-height: 120px; min-height: 46px; padding: 12px; }
.recording { color: var(--danger); font-size: 13px; }

/* keyboard */
.kb-toggle {
  position: fixed; right: 12px; bottom: calc(96px + env(safe-area-inset-bottom)); z-index: 60;
  border: 1px solid var(--border); background: var(--bg-2); color: var(--text);
  border-radius: 999px; padding: 9px 14px; font-size: 13px; cursor: pointer; box-shadow: 0 6px 18px rgba(0,0,0,.45);
}
.vkb {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 80; background: var(--bg-2);
  border-top: 1px solid var(--border); padding: 6px 4px calc(6px + env(safe-area-inset-bottom));
  user-select: none; touch-action: manipulation;
}
.vkb-row { display: flex; justify-content: center; gap: 4px; margin-bottom: 5px; }
.vkb-key {
  flex: 0 1 42px; min-width: 30px; height: 44px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg-3); color: var(--text); font-size: 17px; cursor: pointer; display: grid; place-items: center;
}
.vkb-key:active { background: var(--accent); }
.vkb-key.wide { flex: 0 1 62px; font-size: 13px; }
.vkb-key.space { flex: 1 1 auto; max-width: 320px; }
.vkb-key.active { background: var(--accent); border-color: var(--accent); }

/* password */
.pw-meter { display: flex; gap: 4px; margin-top: 8px; }
.pw-meter i { flex: 1; height: 5px; border-radius: 3px; background: var(--bg-3); transition: background .15s; }
.pw-meter[data-level="1"] i:nth-child(-n+2) { background: #d29922; }
.pw-meter[data-level="2"] i:nth-child(-n+3) { background: #3fb950; }
.pw-meter[data-level="3"] i,
.pw-meter[data-level="4"] i { background: #3fb950; }
.pw-hint { font-size: 12px; color: var(--muted); margin-top: 6px; min-height: 16px; }
.pw-hint.bad { color: var(--danger); }
.pw-hint.good { color: var(--ok); }
.pw-row { display: flex; gap: 8px; align-items: center; }
.pw-row select { width: auto; padding: 10px; }
.pw-wrap { position: relative; }
.pw-wrap .peek {
  position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  background: transparent; border: 0; color: var(--muted); cursor: pointer; padding: 8px; font-size: 15px;
}

/* person picker */
.picker-list { max-height: 52dvh; overflow-y: auto; margin-top: 10px; }
.person-row {
  display: flex; align-items: center; gap: 12px; padding: 10px 8px; border-radius: 12px; cursor: pointer;
  border: 1px solid transparent;
}
.person-row:hover, .person-row:active { background: var(--bg-3); border-color: var(--border); }
.avatar {
  width: 40px; height: 40px; border-radius: 50%; flex: 0 0 auto; display: grid; place-items: center;
  font-weight: 600; font-size: 15px; color: #fff; text-transform: uppercase;
}
.person-name { font-size: 15px; }
.person-sub { font-size: 12px; color: var(--muted); }

/* modal, toasts */
.modal { position: fixed; inset: 0; z-index: 90; background: rgba(0,0,0,.6); display: grid; place-items: center; padding: 16px; }
.modal-box { background: var(--bg-2); border: 1px solid var(--border); border-radius: 16px; padding: 18px; width: min(560px, 96vw); max-height: 88dvh; overflow: auto; }
.modal-box img { max-width: 100%; border-radius: 10px; }
.toasts { position: fixed; left: 50%; transform: translateX(-50%); bottom: calc(90px + env(safe-area-inset-bottom)); z-index: 100; display: flex; flex-direction: column; gap: 8px; align-items: center; pointer-events: none; }
.toast { background: var(--bg-3); border: 1px solid var(--border); padding: 10px 16px; border-radius: 999px; font-size: 14px; box-shadow: 0 8px 24px rgba(0,0,0,.5); }
.toast.err { border-color: var(--danger); color: var(--danger); }
.toast.ok { border-color: var(--ok); }

table.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
table.tbl th, table.tbl td { text-align: left; padding: 9px 6px; border-bottom: 1px solid var(--border); }
table.tbl th { color: var(--muted); font-weight: 500; font-size: 12px; }

.invite-box { background: var(--bg); border: 1px dashed var(--border); border-radius: 10px; padding: 10px; font-size: 12px; word-break: break-all; margin-top: 8px; }