/* ── Reset ─────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

/* ── Matrix tokens ─────────────────────────────────────────────────────────── */
:root {
  --bg:           #000000;
  --surface:      #030d03;
  --surface2:     #071507;
  --surface3:     #0d200d;
  --border:       rgba(0, 255, 65, 0.25);
  --border-mid:   rgba(0, 255, 65, 0.5);
  --border-hi:    rgba(0, 255, 65, 0.8);
  --green:        #00ff41;
  --green-dim:    #00d435;
  --green-faint:  #00a028;
  --green-ghost:  rgba(0,255,65,0.06);
  --text:         #00ff41;
  --text-muted:   #00cc35;
  --text-faint:   #00922a;
  --danger:       #ff4444;
  --glow:         0 0 10px rgba(0,255,65,0.7), 0 0 20px rgba(0,255,65,0.3);
  --glow-sm:      0 0 6px rgba(0,255,65,0.5);
  --glow-text:    0 0 8px rgba(0,255,65,0.8);
  --radius:       2px;
  --radius-sm:    2px;
  --sidebar-w:    260px;
  --topbar-h:     50px;
  --transition:   0.15s ease;
  --font:         'Courier New', Courier, monospace;
}

/* ── Base ──────────────────────────────────────────────────────────────────── */
html { height: 100%; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  height: 100%;
  overflow: hidden;
}
body.auth-page { overflow-y: auto; height: auto; min-height: 100%; }

/* CRT scanline overlay on everything */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 2px,
    rgba(0,0,0,0.08) 2px,
    rgba(0,0,0,0.08) 4px
  );
}

/* CRT flicker */
@keyframes flicker {
  0%,100% { opacity: 1; }
  92%      { opacity: 1; }
  93%      { opacity: 0.94; }
  94%      { opacity: 1; }
  96%      { opacity: 0.97; }
}
body { animation: flicker 8s infinite; }

/* Blink */
@keyframes blink {
  0%,49%  { opacity: 1; }
  50%,100%{ opacity: 0; }
}
.blink { animation: blink 1s step-end infinite; }

/* Glow pulse */
@keyframes glow-pulse {
  0%,100% { text-shadow: var(--glow-text); }
  50%     { text-shadow: 0 0 16px rgba(0,255,65,1), 0 0 32px rgba(0,255,65,0.5); }
}

.green-bright {
  color: #00ff41;
  text-shadow: var(--glow-text);
}

/* ── Scrollbar ─────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--green-faint); }
::-webkit-scrollbar-thumb:hover { background: var(--green-dim); }

/* ── Input wrap (prefix >) ─────────────────────────────────────────────────── */
.input-wrap {
  display: flex;
  align-items: center;
  background: var(--surface2);
  border: 1px solid var(--border);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.input-wrap:focus-within {
  border-color: var(--green);
  box-shadow: var(--glow-sm);
}
.input-prefix {
  padding: 0 0.5rem 0 0.75rem;
  color: var(--green);
  font-size: 0.9rem;
  flex-shrink: 0;
  font-family: var(--font);
  text-shadow: var(--glow-text);
}

.input-wrap input[type="text"],
.input-wrap input[type="password"] {
  border: none;
  background: transparent;
  box-shadow: none;
  padding-left: 0;
}
.input-wrap input:focus { border-color: transparent; box-shadow: none; }

/* ── Inputs ────────────────────────────────────────────────────────────────── */
input[type="text"],
input[type="password"] {
  display: block;
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 0.6rem 0.75rem;
  color: var(--green);
  font-size: 0.9rem;
  font-family: var(--font);
  outline: none;
  caret-color: var(--green);
  transition: border-color var(--transition), box-shadow var(--transition);
  -webkit-appearance: none;
  border-radius: 0;
}
input[type="text"]::placeholder,
input[type="password"]::placeholder { color: var(--text-faint); }
input:focus {
  border-color: var(--green);
  box-shadow: var(--glow-sm);
}

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.btn-primary, button[type="submit"]:not(.send-btn) {
  display: block;
  width: 100%;
  background: transparent;
  color: var(--green);
  border: 1px solid var(--green);
  padding: 0.7rem;
  font-size: 0.9rem;
  font-weight: 700;
  font-family: var(--font);
  letter-spacing: 0.1em;
  cursor: pointer;
  min-height: 44px;
  text-shadow: var(--glow-text);
  box-shadow: var(--glow-sm), inset 0 0 0 0 rgba(0,255,65,0);
  transition: background var(--transition), box-shadow var(--transition), color var(--transition);
}
.btn-primary:hover,
button[type="submit"]:not(.send-btn):hover {
  background: rgba(0,255,65,0.1);
  box-shadow: var(--glow), inset 0 0 20px rgba(0,255,65,0.05);
}
.btn-primary:active,
button[type="submit"]:not(.send-btn):active {
  background: rgba(0,255,65,0.18);
}
.btn-primary:disabled,
button[type="submit"]:not(.send-btn):disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary-sm {
  background: transparent;
  color: var(--green);
  border: 1px solid var(--green);
  padding: 0.5rem 1rem;
  font-size: 0.82rem;
  font-family: var(--font);
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
  min-height: 38px;
  text-shadow: var(--glow-text);
  transition: background var(--transition), box-shadow var(--transition);
}
.btn-primary-sm:hover {
  background: rgba(0,255,65,0.1);
  box-shadow: var(--glow-sm);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: transparent;
  border: 1px solid var(--border-mid);
  color: var(--text-muted);
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
  font-family: var(--font);
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  min-height: 34px;
  transition: color var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.btn-secondary:hover {
  color: var(--green);
  border-color: var(--green);
  box-shadow: var(--glow-sm);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  min-width: 32px;
  min-height: 32px;
  font-family: var(--font);
  transition: color var(--transition), text-shadow var(--transition);
}
.btn-icon:hover {
  color: var(--green);
  text-shadow: var(--glow-text);
}
.btn-icon.active-icon {
  color: var(--green);
  text-shadow: var(--glow-text);
}

.btn-add { color: var(--green-dim); }
.btn-add:hover { color: var(--green); }
.btn-menu { color: var(--text); }

.btn-members { gap: 0.35rem; width: auto; padding: 6px 0.55rem; }
.btn-members-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

/* ── Error ─────────────────────────────────────────────────────────────────── */
.error-msg {
  color: var(--danger);
  font-size: 0.8rem;
  padding: 0.4rem 0;
  font-family: var(--font);
}
.error-msg::before { content: '! '; }

/* ══════════════════════════════════════════════════════════════════════════════
   AUTH PAGE
═══════════════════════════════════════════════════════════════════════════════ */
.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100%;
  padding: 1rem;
  padding-bottom: max(1rem, env(safe-area-inset-bottom));
  position: relative;
}

/* Matrix rain canvas */
#matrix-rain {
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.35;
}

.auth-card {
  position: relative;
  z-index: 1;
  background: rgba(0, 8, 0, 0.88);
  border: 1px solid var(--border-mid);
  box-shadow: var(--glow);
  padding: 2rem 1.75rem;
  width: 100%;
  max-width: 400px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

/* Corner decorations */
.auth-card::before, .auth-card::after {
  content: '';
  position: absolute;
  width: 12px;
  height: 12px;
  border-color: var(--green);
  border-style: solid;
}
.auth-card::before { top: -1px; left: -1px; border-width: 2px 0 0 2px; }
.auth-card::after  { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }

.auth-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.3rem;
}
.auth-logo-icon {
  color: var(--green);
  font-size: 1.4rem;
  text-shadow: var(--glow-text);
}
.auth-logo h1 {
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  text-shadow: none;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  margin-bottom: 1.5rem;
}

.tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.tab {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  padding: 0.5rem 1rem;
  cursor: pointer;
  color: var(--text-faint);
  font-size: 0.8rem;
  font-family: var(--font);
  font-weight: 700;
  letter-spacing: 0.08em;
  min-height: 40px;
  transition: color var(--transition), border-color var(--transition), text-shadow var(--transition);
}
.tab.active {
  color: var(--green);
  border-bottom-color: var(--green);
  text-shadow: var(--glow-text);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-bottom: 1rem;
}
.form-group label {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 700;
  letter-spacing: 0.12em;
}

/* ── Rules box ─────────────────────────────────────────────────────────────── */
#register-fields { display: flex; flex-direction: column; gap: 0; }
#register-fields .form-group { margin-bottom: 1rem; }

.rules-box {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-left: 2px solid var(--green-dim);
  padding: 0.8rem 1rem;
  margin-bottom: 0.9rem;
}
.rules-title {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--green-dim);
  margin-bottom: 0.6rem;
  text-shadow: var(--glow-sm);
}
.rules-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.rules-list li {
  font-size: 0.78rem;
  color: var(--green-dim);
  padding-left: 1.2rem;
  position: relative;
  line-height: 1.45;
}
.rules-list li::before {
  content: '>';
  position: absolute;
  left: 0;
  color: var(--green-dim);
  font-weight: 700;
}

/* ── Checkbox ──────────────────────────────────────────────────────────────── */
.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  cursor: pointer;
  margin-bottom: 1rem;
  user-select: none;
  -webkit-user-select: none;
}
.checkbox-label input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.checkbox-custom {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  margin-top: 2px;
  background: var(--surface2);
  border: 1px solid var(--border-mid);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.checkbox-label input:checked + .checkbox-custom {
  border-color: var(--green);
  box-shadow: var(--glow-sm);
}
.checkbox-label input:checked + .checkbox-custom::after {
  content: '✓';
  color: var(--green);
  font-size: 11px;
  text-shadow: var(--glow-text);
}
.checkbox-label input:focus-visible + .checkbox-custom {
  outline: 1px solid var(--green);
  outline-offset: 2px;
}
.checkbox-text {
  font-size: 0.78rem;
  color: var(--green-dim);
  line-height: 1.4;
}

/* ══════════════════════════════════════════════════════════════════════════════
   CHAT LAYOUT — MOBILE FIRST
═══════════════════════════════════════════════════════════════════════════════ */
.chat-page {
  display: flex;
  height: 100%;
  height: 100dvh;
  position: relative;
  overflow: hidden;
}

/* ── Sidebar backdrop ───────────────────────────────────────────────────────── */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  z-index: 40;
  opacity: 0;
  transition: opacity var(--transition);
}

/* ── Sidebar ───────────────────────────────────────────────────────────────── */
.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: min(var(--sidebar-w), 85vw);
  background: var(--surface);
  border-right: 1px solid var(--border-mid);
  box-shadow: 4px 0 24px rgba(0,255,65,0.08);
  display: flex;
  flex-direction: column;
  z-index: 50;
  transform: translateX(-100%);
  transition: transform var(--transition);
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
}

.sidebar-open .sidebar { transform: translateX(0); }
.sidebar-open .sidebar-backdrop { display: block; opacity: 1; }

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0.9rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  gap: 0.5rem;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.brand-icon { color: var(--green); font-size: 1rem; text-shadow: var(--glow-text); }
.brand-name {
  font-size: 0.9rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  color: var(--green);
  text-shadow: var(--glow-text);
}

.sidebar-header-actions {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  flex-shrink: 0;
}

.user-status-wrap { position: relative; flex-shrink: 0; }

.username-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  font-weight: 700;
  font-family: var(--font);
  color: var(--text-muted);
  background: var(--surface3);
  border: 1px solid var(--border);
  padding: 0.15rem 0.5rem;
  max-width: 100px;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
}
.username-badge:hover {
  border-color: var(--border-mid);
  color: var(--green);
}
.username-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  letter-spacing: 0.05em;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--green);
  box-shadow: 0 0 5px var(--green);
}
.status-dot.offline { background: #444; box-shadow: none; }

.status-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 60;
  width: 160px;
  background: var(--surface);
  border: 1px solid var(--border-mid);
  box-shadow: 0 4px 24px rgba(0,255,65,0.12);
  padding: 0.3rem;
}
.status-menu-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.78rem;
  padding: 0.45rem 0.5rem;
  cursor: pointer;
  text-align: left;
  transition: background var(--transition), color var(--transition);
}
.status-menu-item:hover { background: var(--green-ghost); color: var(--green); }
.status-menu-item.active { color: var(--green); text-shadow: var(--glow-sm); }

.sidebar-body {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0.5rem 0 1rem;
}

.sidebar-section { padding: 0.5rem 0; }
.sidebar-section + .sidebar-section { border-top: 1px solid var(--border); }

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem 0.35rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--green-faint);
}

.room-count {
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--green-faint);
  background: var(--surface3);
  border: 1px solid var(--border);
  padding: 0 0.3rem;
  letter-spacing: 0.04em;
}

.room-list { list-style: none; padding: 0 0.3rem; }
.room-list li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.6rem;
  cursor: pointer;
  color: var(--green-dim);
  font-size: 0.82rem;
  font-family: var(--font);
  min-height: 36px;
  transition: color var(--transition), background var(--transition), text-shadow var(--transition);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  position: relative;
}
.room-list li::before {
  content: '#';
  color: var(--green-faint);
  font-weight: 700;
  flex-shrink: 0;
}
.room-list li.private::before { content: '🔒'; font-size: 0.7rem; }
.room-list li:hover {
  color: var(--green);
  background: var(--green-ghost);
  text-shadow: var(--glow-sm);
}
.room-list li.active {
  color: var(--green);
  background: rgba(0,255,65,0.06);
  text-shadow: var(--glow-text);
}
.room-list li.active::after {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--green);
  box-shadow: var(--glow-sm);
}

.room-name-text {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.room-list li.not-member { opacity: 0.55; }
.room-list li.not-member:hover { opacity: 0.85; }
.room-not-joined {
  font-size: 0.58rem;
  color: var(--text-faint);
  border: 1px solid var(--border);
  padding: 0.05rem 0.3rem;
  letter-spacing: 0.04em;
  flex-shrink: 0;
  white-space: nowrap;
}

/* ── Chat main ─────────────────────────────────────────────────────────────── */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  width: 100%;
  padding-bottom: env(safe-area-inset-bottom);
}

/* ── Mobile topbar ─────────────────────────────────────────────────────────── */
.mobile-topbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  height: var(--topbar-h);
  padding: 0 0.75rem;
  padding-left: max(0.75rem, env(safe-area-inset-left));
  padding-right: max(0.75rem, env(safe-area-inset-right));
  background: var(--surface);
  border-bottom: 1px solid var(--border-mid);
  flex-shrink: 0;
}

.mobile-room-info {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  min-width: 0;
  overflow: hidden;
}

.mobile-room-title {
  font-size: 0.85rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: var(--green);
  text-shadow: var(--glow-sm);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
  flex-shrink: 1;
}

.mobile-topbar-actions { display: flex; align-items: center; gap: 0.75rem; flex-shrink: 0; }

.btn-invite-inline {
  background: transparent;
  border: 1px solid var(--border-mid);
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.45rem;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  min-height: 26px;
  transition: color var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.btn-invite-inline:hover {
  color: var(--green);
  border-color: var(--green);
  box-shadow: var(--glow-sm);
}

.desktop-only { display: none; }
.mobile-only   { display: block; }

/* ── Welcome ───────────────────────────────────────────────────────────────── */
.welcome {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  overflow: hidden;
}
.welcome-inner {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}
.ascii-logo {
  font-size: clamp(0.35rem, 1.8vw, 0.62rem);
  line-height: 1.2;
  color: var(--green);
  text-shadow: var(--glow-text);
  letter-spacing: 0.05em;
  animation: glow-pulse 3s ease-in-out infinite;
  white-space: pre;
}
.welcome-sub {
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-top: 0.25rem;
}
.welcome-inner .btn-primary { margin-top: 0.5rem; width: auto; padding: 0.6rem 1.4rem; }

.welcome-rooms {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1rem;
  width: 100%;
  max-width: 520px;
  text-align: left;
}
.welcome-rooms-col {
  flex: 1;
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--border);
}
.welcome-rooms-col .section-title { padding: 0.55rem 0.75rem 0.35rem; }
.welcome-rooms-col .room-list {
  padding: 0 0.3rem 0.4rem;
  max-height: 200px;
  overflow-y: auto;
}

@media (min-width: 700px) {
  .welcome-rooms { flex-direction: row; gap: 1.25rem; }
  .welcome-rooms-col .room-list { max-height: 240px; }
}

/* ── Chat view ─────────────────────────────────────────────────────────────── */
#chat-view { flex: 1; display: flex; flex-direction: column; overflow: hidden; min-height: 0; }

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 1.1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
}
.chat-header-info { display: flex; align-items: center; gap: 0.5rem; min-width: 0; }
.room-badge-icon { font-size: 0.9rem; flex-shrink: 0; }
.chat-header-info h2 {
  font-size: 0.9rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: var(--green);
  text-shadow: var(--glow-sm);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.room-badge-label {
  font-size: 0.65rem;
  font-family: var(--font);
  color: var(--green-faint);
  border: 1px solid var(--border);
  padding: 0.1rem 0.45rem;
  letter-spacing: 0.08em;
  flex-shrink: 0;
}

/* ── Session expired banner ────────────────────────────────────────────────── */
.session-banner {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 500;
  background: rgba(20,0,0,0.97);
  border-bottom: 1px solid var(--danger);
  padding: 0.65rem 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--danger);
  font-family: var(--font);
  letter-spacing: 0.04em;
}
.session-banner-link {
  color: var(--green);
  text-decoration: none;
  border: 1px solid var(--green);
  padding: 0.2rem 0.6rem;
  font-size: 0.72rem;
  font-weight: 700;
  font-family: var(--font);
  letter-spacing: 0.08em;
  white-space: nowrap;
  transition: background var(--transition);
}
.session-banner-link:hover { background: rgba(0,255,65,0.1); }

/* ── Invite tray ───────────────────────────────────────────────────────────── */
.invite-tray {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  width: min(420px, 96vw);
  background: var(--surface);
  border: 1px solid var(--border-mid);
  border-top: none;
  box-shadow: 0 4px 32px rgba(0,255,65,0.18);
}
.invite-tray-header {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--green-faint);
  padding: 0.45rem 0.85rem 0.3rem;
  border-bottom: 1px solid var(--border);
}
.invite-tray-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-height: 40vh;
  overflow-y: auto;
}
.invite-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.6rem 0.85rem;
  border-bottom: 1px solid var(--border);
}
.invite-card:last-child { border-bottom: none; }
.invite-card-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.invite-card-text .inv-from  { color: var(--green); font-weight: 700; }
.invite-card-text .inv-room  { color: var(--green); font-weight: 700; }
.invite-card-actions { display: flex; gap: 0.4rem; flex-shrink: 0; }
.btn-invite-accept {
  background: transparent;
  border: 1px solid var(--green);
  color: var(--green);
  font-family: var(--font);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.6rem;
  cursor: pointer;
  min-height: 30px;
  transition: background var(--transition), box-shadow var(--transition);
}
.btn-invite-accept:hover { background: rgba(0,255,65,0.12); box-shadow: var(--glow-sm); }
.btn-invite-decline {
  background: transparent;
  border: 1px solid var(--border-mid);
  color: var(--text-faint);
  font-family: var(--font);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.6rem;
  cursor: pointer;
  min-height: 30px;
  transition: border-color var(--transition), color var(--transition);
}
.btn-invite-decline:hover { border-color: var(--danger); color: var(--danger); }

/* ── Private room access bar ───────────────────────────────────────────────── */
.room-access-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.28rem 0.85rem;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  overflow: hidden;
  min-height: 0;
}
.access-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--green-faint);
  flex-shrink: 0;
}
.access-names {
  font-size: 0.68rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0.03em;
}

/* ── Messages ──────────────────────────────────────────────────────────────── */
.messages-container {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0.75rem 0.85rem 0.5rem;
  display: flex;
  flex-direction: column;
  -webkit-overflow-scrolling: touch;
}

.msg { display: flex; flex-direction: column; }
.msg.group-start { margin-top: 0.85rem; }
.msg.is-continuation { margin-top: 0.05rem; }

.msg-header {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.1rem;
}
.msg-user {
  font-size: 0.78rem;
  font-weight: 900;
  color: var(--green);
  text-shadow: var(--glow-sm);
  letter-spacing: 0.05em;
}
.msg-user::after { content: ':'; color: var(--text-faint); }
.msg-time {
  font-size: 0.68rem;
  color: var(--green-faint);
  letter-spacing: 0.04em;
}
.msg-time::before { content: '['; }
.msg-time::after  { content: ']'; }

.msg-content {
  font-size: 0.88rem;
  line-height: 1.6;
  color: #c8ffd4;
  word-break: break-word;
  padding-left: 0;
}

.msg.system {
  color: var(--green-faint);
  font-size: 0.75rem;
  text-align: center;
  padding: 0.35rem 0;
  margin: 0.25rem 0;
  letter-spacing: 0.06em;
}
.msg.system::before { content: '-- '; }
.msg.system::after  { content: ' --'; }

/* ── Chat body (messages + members side by side) ───────────────────────────── */
.chat-body {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
  position: relative;
}

/* ── Members panel ─────────────────────────────────────────────────────────── */
.members-panel {
  width: 175px;
  flex-shrink: 0;
  background: var(--surface);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}
.members-panel-body {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  min-height: 0;
}

/* Mobile: absolute overlay from the right of .chat-area */
@media (max-width: 699px) {
  .members-panel {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 30;
    width: min(200px, 78vw);
    box-shadow: -4px 0 24px rgba(0,255,65,0.12);
    border-left: 1px solid var(--border-mid);
    transform: translateX(100%);
    transition: transform var(--transition);
  }
  .members-panel:not([hidden]) {
    transform: translateX(0);
  }
}

.members-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.75rem 0.5rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  gap: 0.4rem;
}
.members-panel-title {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--green-faint);
}
.members-count {
  font-size: 0.65rem;
  color: var(--text-muted);
  font-family: var(--font);
  letter-spacing: 0.05em;
  flex-shrink: 0;
  flex: 1;
}
.members-private-tag {
  font-size: 0.58rem;
  font-weight: 700;
  font-style: italic;
  letter-spacing: 0.1em;
  color: var(--green-faint);
  padding: 0.2rem 0.75rem;
  border-bottom: 1px solid var(--border);
}
#members-close-btn {
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--font);
  letter-spacing: 0.05em;
  line-height: 1;
  padding: 0.2rem 0.45rem;
  min-width: 28px;
  min-height: 26px;
  flex-shrink: 0;
  border: 1px solid var(--border-mid);
  color: var(--text-muted);
  background: transparent;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}
#members-close-btn:hover {
  color: var(--green);
  border-color: var(--green);
}

.members-section {
  padding: 0.5rem 0 0.25rem;
}
.members-section--offline {
  border-top: 1px solid var(--border);
  margin-top: 0.25rem;
  padding-top: 0.75rem;
}
.members-section-title {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--text-faint);
  padding: 0 0.75rem 0.3rem;
}
.members-online-count {
  font-size: 0.58rem;
  color: var(--green-faint);
  background: var(--surface3);
  border: 1px solid var(--border);
  padding: 0 0.3rem;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.members-list {
  list-style: none;
}
.members-list li {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  font-family: var(--font);
  overflow: hidden;
}
.member-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  overflow: hidden;
}
.members-list li .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}
.members-list li.online .dot  { background: var(--green); box-shadow: 0 0 5px var(--green); }
.members-list li.offline .dot { background: #444; }
.members-list li.online  .member-name { color: var(--text-muted); }
.members-list li.offline .member-name { color: var(--text-faint); }
.members-list li.is-me   .member-name { color: var(--green); text-shadow: var(--glow-sm); }

.member-name {
  font-size: 0.8rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
}
.member-desc {
  font-size: 0.65rem;
  color: var(--text-faint);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-style: italic;
  letter-spacing: 0.02em;
  padding-left: calc(6px + 0.45rem);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

/* Each button pinned to exactly one breakpoint */
@media (max-width: 699px) { #invite-btn         { display: none !important; } }
@media (min-width: 700px) { #mobile-invite-btn  { display: none !important; } }
@media (max-width: 699px) { #members-toggle-btn { display: none !important; } }
@media (min-width: 700px) { #mobile-members-btn { display: none !important; } }
@media (max-width: 699px) { #leave-btn          { display: none !important; } }
@media (min-width: 700px) { #mobile-leave-btn   { display: none !important; } }

.btn-leave {
  background: transparent;
  border: 1px solid var(--border-mid);
  color: var(--text-faint);
  font-family: var(--font);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.5rem;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  min-height: 26px;
  transition: color var(--transition), border-color var(--transition);
}
.btn-leave:hover {
  color: var(--danger);
  border-color: var(--danger);
}

/* ── Admin delete button ───────────────────────────────────────────────────── */
.msg { position: relative; }

.msg-delete {
  display: none;
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: 1px solid var(--danger);
  color: var(--danger);
  font-family: var(--font);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.1rem 0.35rem;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity var(--transition), background var(--transition);
}
.msg-delete:hover { opacity: 1; background: rgba(255,49,49,0.12); }
.msg:hover .msg-delete { display: block; }

/* Admin badge in user list */
.member-admin {
  font-size: 0.58rem;
  color: var(--green);
  border: 1px solid var(--green-faint);
  padding: 0 0.3rem;
  letter-spacing: 0.06em;
  flex-shrink: 0;
  align-self: center;
  text-shadow: var(--glow-sm);
}

/* ── Message form ──────────────────────────────────────────────────────────── */
.message-form {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.75rem;
  padding-left: max(0.75rem, env(safe-area-inset-left));
  padding-right: max(0.75rem, env(safe-area-inset-right));
  background: var(--surface);
  border-top: 1px solid var(--border-mid);
  flex-shrink: 0;
}

.prompt-prefix {
  font-size: 0.9rem;
  color: var(--green);
  text-shadow: var(--glow-text);
  flex-shrink: 0;
  font-family: var(--font);
  letter-spacing: -0.05em;
}

.message-form input[type="text"] {
  flex: 1;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  padding: 0.4rem 0.5rem;
  font-size: 0.88rem;
  color: var(--green);
  caret-color: var(--green);
}
.message-form input[type="text"]:focus {
  border-bottom-color: var(--green);
  box-shadow: 0 2px 0 rgba(0,255,65,0.3);
}

.send-btn {
  background: transparent;
  color: var(--green-dim);
  border: 1px solid var(--border);
  padding: 0.4rem 0.75rem;
  font-size: 0.72rem;
  font-family: var(--font);
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
  min-height: 36px;
  flex-shrink: 0;
  transition: color var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.send-btn:hover {
  color: var(--green);
  border-color: var(--green);
  box-shadow: var(--glow-sm);
}
.send-btn:active { background: rgba(0,255,65,0.08); }

.btn-attach {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: transparent;
  border: 1px solid var(--border-mid);
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.4rem 0.6rem;
  cursor: pointer;
  flex-shrink: 0;
  min-height: 36px;
  transition: color var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.btn-attach:hover {
  color: var(--green);
  border-color: var(--green);
  box-shadow: var(--glow-sm);
}
.btn-attach-label { display: none; }
@media (min-width: 460px) {
  .btn-attach-label { display: inline; }
}

/* ── File preview chip (before send) ──────────────────────────────────────── */
.file-preview {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.4rem 0.85rem;
  background: var(--surface2);
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--text-muted);
  flex-shrink: 0;
}
.file-preview-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file-preview-name::before { content: '📎 '; }
.file-preview-remove {
  background: none;
  border: none;
  color: var(--text-faint);
  cursor: pointer;
  flex-shrink: 0;
  padding: 0.1rem 0.3rem;
}
.file-preview-remove:hover { color: var(--danger); }

/* ── Message attachments ───────────────────────────────────────────────────── */
.msg-attachment { margin-top: 0.35rem; }
.msg-attachment-img {
  max-width: min(320px, 70vw);
  max-height: 320px;
  border: 1px solid var(--border);
  cursor: pointer;
  display: block;
}
.msg-attachment-video, .msg-attachment-audio {
  max-width: min(360px, 80vw);
  display: block;
}
.file-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 0.45rem 0.65rem;
  max-width: min(360px, 80vw);
}
.file-chip-icon { font-size: 1rem; flex-shrink: 0; }
.file-chip-info { min-width: 0; display: flex; flex-direction: column; gap: 0.1rem; }
.file-chip-name {
  font-size: 0.8rem;
  color: var(--green-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file-chip-meta { font-size: 0.65rem; color: var(--text-muted); }
.file-chip-actions { display: flex; flex-direction: column; gap: 0.3rem; flex-shrink: 0; margin-left: auto; }
.file-chip-actions a {
  display: inline-block;
  text-align: center;
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
  border: 1px solid var(--border-mid);
  padding: 0.2rem 0.5rem;
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.file-chip-actions .view-link {
  color: var(--green);
  border-color: var(--green-faint);
}
.file-chip-actions .view-link:hover {
  background: rgba(0,255,65,0.1);
  border-color: var(--green);
  box-shadow: var(--glow-sm);
}
.file-chip-actions .dl-link {
  color: var(--text-faint);
}
.file-chip-actions .dl-link:hover {
  color: var(--text-muted);
  border-color: var(--border-hi);
}

/* ── Modal ─────────────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
  padding-bottom: max(1rem, env(safe-area-inset-bottom));
}
.modal {
  background: var(--surface);
  border: 1px solid var(--border-mid);
  box-shadow: 0 0 40px rgba(0,255,65,0.15);
  padding: 1.5rem 1.25rem;
  width: 100%;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
}
.modal::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--green), transparent);
  box-shadow: 0 0 10px var(--green);
}
.modal h3 {
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  color: var(--green);
  text-shadow: var(--glow-sm);
}
.modal-actions { display: flex; gap: 0.6rem; justify-content: flex-end; }

/* ── Success message ───────────────────────────────────────────────────────── */
.success-msg {
  color: var(--green-dim);
  font-size: 0.8rem;
  padding: 0.4rem 0;
  font-family: var(--font);
}
.success-msg::before { content: '✓ '; }

/* ── Settings overlay ──────────────────────────────────────────────────────── */
.settings-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 300;
  padding: 1rem;
  padding-bottom: max(1rem, env(safe-area-inset-bottom));
}
.settings-panel {
  background: var(--surface);
  border: 1px solid var(--border-mid);
  box-shadow: var(--glow);
  width: 100%;
  max-width: 440px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  position: relative;
}
.settings-panel::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--green), transparent);
  box-shadow: 0 0 10px var(--green);
}
.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.25rem 0.75rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.settings-header .btn-icon {
  color: var(--text-muted);
  border: 1px solid var(--border);
  font-size: 1rem;
  padding: 4px 8px;
  min-width: unset;
  min-height: unset;
  line-height: 1;
}
.settings-header .btn-icon:hover {
  color: var(--danger);
  border-color: var(--danger);
  text-shadow: 0 0 8px var(--danger);
  background: rgba(255,68,68,0.08);
}
.settings-title {
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  color: var(--green);
  text-shadow: var(--glow-sm);
}
.settings-body {
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}
.settings-section {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.settings-section-title {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--green-dim);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4rem;
}
.settings-textarea {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--green);
  font-family: var(--font);
  font-size: 0.85rem;
  padding: 0.6rem 0.75rem;
  resize: vertical;
  min-height: 68px;
  max-height: 130px;
  outline: none;
  caret-color: var(--green);
  border-radius: 0;
  -webkit-appearance: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.settings-textarea::placeholder { color: var(--text-faint); }
.settings-textarea:focus { border-color: var(--green); box-shadow: var(--glow-sm); }
.settings-status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.settings-status-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: var(--font);
}
.settings-status-hint {
  font-size: 0.68rem;
  color: var(--text-faint);
  font-family: var(--font);
  margin-top: -0.25rem;
}
.status-toggle {
  position: relative;
  width: 38px;
  height: 22px;
  background: var(--surface3);
  border: 1px solid var(--border-mid);
  border-radius: 11px;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.status-toggle[aria-pressed="true"] {
  background: rgba(0,255,65,0.12);
  border-color: var(--green);
  box-shadow: var(--glow-sm);
}
.status-toggle-knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 14px;
  height: 14px;
  background: var(--text-faint);
  border-radius: 50%;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
}
.status-toggle[aria-pressed="true"] .status-toggle-knob {
  transform: translateX(16px);
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
}

.settings-char-row {
  font-size: 0.65rem;
  color: var(--text-faint);
  text-align: right;
  font-family: var(--font);
  letter-spacing: 0.05em;
  margin-top: -0.4rem;
}

/* ══════════════════════════════════════════════════════════════════════════════
   DESKTOP  ≥ 700px
═══════════════════════════════════════════════════════════════════════════════ */
@media (min-width: 700px) {
  .sidebar {
    position: static;
    transform: none !important;
    width: var(--sidebar-w);
    flex-shrink: 0;
    padding-top: 0;
    padding-bottom: 0;
  }
  .sidebar-backdrop       { display: none !important; }
  .mobile-topbar          { display: none; }
  .desktop-only           { display: flex; }
  .mobile-only            { display: none !important; }

  .modal::before { display: block; }

  .messages-container { padding: 1rem 1.25rem 0.75rem; }
  .message-form { padding: 0.65rem 1.25rem; }
  .room-list li { font-size: 0.82rem; min-height: 34px; }
}

/* ══════════════════════════════════════════════════════════════════════════════
   LARGE  ≥ 1100px
═══════════════════════════════════════════════════════════════════════════════ */
@media (min-width: 1100px) {
  :root { --sidebar-w: 270px; }
  body  { font-size: 14px; }
  .msg-content { font-size: 0.88rem; }
}