/* ── Reset & variables ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:           #0b0b18;
  --bg2:          #10101f;
  --bg3:          #16162a;
  --card:         rgba(255,255,255,0.04);
  --card-h:       rgba(255,255,255,0.07);
  --border:       rgba(255,255,255,0.08);
  --border-h:     rgba(0,212,255,0.35);
  --cyan:         #00d4ff;
  --purple:       #7b2fff;
  --green:        #00ff88;
  --red:          #ff4455;
  --text:         #dde1f0;
  --text2:        #7a7f9a;
  --text3:        #4a4f6a;
  --radius:       12px;
  --radius-sm:    8px;
  --shadow:       0 8px 40px rgba(0,0,0,0.6);
  --glow-c:       0 0 24px rgba(0,212,255,0.25);
  --glow-p:       0 0 24px rgba(123,47,255,0.25);
  --topbar-h:     56px;
  --tabs-h:       42px;
  --sidebar-w:    220px;
}

html, body { height: 100%; font-family: 'Segoe UI', system-ui, sans-serif; }

/* scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-h); border-radius: 3px; }

/* ── Particles / BG ──────────────────────────────────────────────────────── */
#particles-canvas {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
}
.bg-grid {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* ═══════════════════════════════════════════════════════════════════════════
   WELCOME PAGE
   ═══════════════════════════════════════════════════════════════════════════ */

.welcome-page {
  background: var(--bg);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  color: var(--text);
  overflow-x: hidden;
}

.welcome-wrap {
  position: relative; z-index: 1;
  width: 100%; max-width: 800px;
}

.welcome-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px 36px;
  box-shadow: var(--shadow), var(--glow-p);
}

/* Logo */
.logo-block { text-align: center; margin-bottom: 32px; }
.logo-icon svg { width: 72px; height: 72px; filter: drop-shadow(0 0 16px rgba(0,212,255,0.4)); }
.logo-title {
  font-size: 2.6rem; font-weight: 800; letter-spacing: -0.5px;
  color: var(--text); margin: 8px 0 4px;
}
.logo-title span {
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.logo-sub { color: var(--text2); font-size: 0.95rem; }

/* Rules */
.rules-block {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 28px;
}
.rules-block h3 {
  font-size: 1rem; font-weight: 700; color: var(--cyan);
  margin-bottom: 14px; display: flex; align-items: center; gap: 8px;
}
.rules-block ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.rules-block li {
  font-size: 0.88rem; color: var(--text2);
  display: flex; align-items: flex-start; gap: 10px;
}
.rules-block li span:first-child { flex-shrink: 0; }

/* Avatars */
.avatar-block { margin-bottom: 28px; }
.avatar-block h3 {
  font-size: 1rem; font-weight: 700; color: var(--text);
  margin-bottom: 16px; display: flex; align-items: center; gap: 8px;
}
.avatar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 12px;
}
.avatar-card {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 8px 10px;
  cursor: pointer;
  text-align: center;
  transition: border-color .2s, transform .15s, box-shadow .2s;
  position: relative;
  overflow: hidden;
}
.avatar-card::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255,255,255,0.03));
  pointer-events: none;
}
.avatar-card:hover {
  border-color: var(--cyan);
  transform: translateY(-3px);
  box-shadow: var(--glow-c);
}
.avatar-card.selected {
  border-color: var(--cyan);
  background: rgba(0,212,255,0.08);
  box-shadow: var(--glow-c);
}
.avatar-card.selected::after {
  content: '✓';
  position: absolute; top: 6px; right: 8px;
  color: var(--cyan); font-size: 0.8rem; font-weight: 700;
}
.avatar-svg {
  width: 72px; height: 72px;
  margin: 0 auto 8px;
  border-radius: 50%;
  overflow: hidden;
  display: block;
}
.avatar-svg svg { width: 100%; height: 100%; }
.avatar-name {
  font-size: 0.75rem; font-weight: 700;
  color: var(--text); white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
}
.avatar-game {
  font-size: 0.65rem; color: var(--text3); margin-top: 2px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.avatar-hint {
  text-align: center; font-size: 0.8rem; color: var(--text2);
  margin-top: 10px; min-height: 1.2em;
}

/* Username & enter */
.username-block { display: flex; flex-direction: column; gap: 12px; }
.input-wrap {
  display: flex; align-items: center; gap: 0;
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius-sm); overflow: hidden;
  transition: border-color .2s, box-shadow .2s;
}
.input-wrap:focus-within {
  border-color: var(--cyan); box-shadow: var(--glow-c);
}
.input-icon {
  padding: 0 14px; font-size: 1.1rem; line-height: 1;
  color: var(--text2);
}
.input-wrap input {
  flex: 1; background: none; border: none; outline: none;
  color: var(--text); font-size: 1rem; padding: 14px 14px 14px 0;
  font-family: inherit;
}
.input-wrap input::placeholder { color: var(--text3); }

.enter-btn {
  width: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  color: #fff; border: none; border-radius: var(--radius-sm);
  padding: 14px; font-size: 1rem; font-weight: 700;
  cursor: pointer; transition: opacity .2s, transform .15s, box-shadow .2s;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  letter-spacing: 0.3px;
}
.enter-btn:hover:not(:disabled) {
  transform: translateY(-2px); box-shadow: 0 6px 28px rgba(0,212,255,0.35);
}
.enter-btn:active:not(:disabled) { transform: translateY(0); }
.enter-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.enter-btn .arrow { font-size: 1.2rem; }

.error-msg { color: var(--red); font-size: 0.85rem; text-align: center; min-height: 1.1em; }
.disclaimer { text-align: center; font-size: 0.72rem; color: var(--text3); margin-top: 16px; }

/* ═══════════════════════════════════════════════════════════════════════════
   CHAT PAGE
   ═══════════════════════════════════════════════════════════════════════════ */

.chat-page {
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Topbar */
.topbar {
  height: var(--topbar-h);
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
  padding: 0 16px; gap: 12px;
  flex-shrink: 0; z-index: 10;
}
.topbar-left, .topbar-right { flex: 1; display: flex; align-items: center; }
.topbar-right { justify-content: flex-end; gap: 10px; }
.topbar-center { display: flex; align-items: center; justify-content: center; }

.topbar-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.05rem; font-weight: 800;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.room-badge {
  display: flex; align-items: center; gap: 7px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 20px; padding: 5px 14px;
  font-size: 0.85rem; font-weight: 600; color: var(--text2);
}
.room-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.my-avatar-badge {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.8rem; color: var(--text2);
}
.my-avatar-badge .mini-avatar {
  width: 30px; height: 30px; border-radius: 50%;
  border: 2px solid var(--cyan); overflow: hidden; flex-shrink: 0;
}
.my-avatar-badge .mini-avatar svg { width: 100%; height: 100%; }
.my-avatar-badge .my-name {
  font-weight: 600; color: var(--text);
  max-width: 100px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

.leave-btn {
  background: none; border: 1px solid var(--border);
  color: var(--text2); border-radius: var(--radius-sm);
  padding: 5px 12px; font-size: 0.78rem; cursor: pointer;
  transition: border-color .2s, color .2s;
}
.leave-btn:hover { border-color: var(--red); color: var(--red); }

/* Tabs */
.tabs-bar {
  height: var(--tabs-h);
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: flex-end;
  padding: 0 12px; gap: 4px;
  flex-shrink: 0; overflow-x: auto; overflow-y: hidden;
}
.tabs-bar::-webkit-scrollbar { height: 3px; }

.tab {
  display: flex; align-items: center; gap: 7px;
  background: none; border: none; border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  color: var(--text2); font-size: 0.82rem; font-weight: 600;
  padding: 8px 14px; cursor: pointer;
  transition: color .15s, background .15s;
  white-space: nowrap; position: relative;
  border-bottom: 2px solid transparent;
}
.tab:hover { color: var(--text); background: var(--card); }
.tab.active {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
  background: var(--card);
}
.tab-dot { width: 7px; height: 7px; border-radius: 50%; }
.public-dot { background: var(--cyan); }
.private-dot { background: var(--purple); }
.tab-close {
  font-size: 0.7rem; color: var(--text3); margin-left: 4px;
  background: none; border: none; cursor: pointer; padding: 0 2px;
  line-height: 1;
}
.tab-close:hover { color: var(--red); }

/* Layout */
.chat-layout {
  flex: 1; display: flex; flex-direction: column; min-height: 0;
}

.chat-main-row {
  flex: 1; display: flex; min-height: 0;
}

/* Messages panel */
.messages-panel {
  flex: 1; display: flex; flex-direction: column; min-width: 0;
  background: var(--bg);
}
/* Game strip — dedicated bar at the bottom of chat-layout */
#gameCanvas {
  width: 100%;
  height: 120px;
  display: block;
  background: var(--bg);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.messages-area {
  flex: 1; overflow-y: auto; padding: 16px;
  background: var(--bg);
}
.messages-inner {
  display: flex; flex-direction: column; gap: 4px;
  min-height: 100%;
}

/* Message bubbles */
.msg-group { display: flex; flex-direction: column; gap: 2px; margin: 6px 0; }
.msg-group.self { align-items: flex-end; }

.msg-header {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 3px;
}
.msg-group.self .msg-header { flex-direction: row-reverse; }

.msg-mini-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  overflow: hidden; flex-shrink: 0; border: 1px solid var(--border);
}
.msg-mini-avatar svg { width: 100%; height: 100%; }

.msg-sender {
  font-size: 0.78rem; font-weight: 700;
  color: var(--cyan);
}
.msg-group.self .msg-sender { color: var(--purple); }

.msg-time {
  font-size: 0.68rem; color: var(--text3);
}

.msg-bubble {
  max-width: 65%;
  background: var(--bg3);
  border: 1px solid var(--border);
  backdrop-filter: blur(2px);
  border-radius: 4px 14px 14px 14px;
  padding: 8px 14px;
  font-size: 0.9rem; line-height: 1.5;
  color: var(--text); word-break: break-word;
  position: relative;
}
.msg-group.self .msg-bubble {
  background: rgba(123,47,255,0.15);
  border-color: rgba(123,47,255,0.3);
  border-radius: 14px 4px 14px 14px;
}

/* System messages */
.sys-msg {
  text-align: center; font-size: 0.75rem; color: var(--text3);
  padding: 4px 0;
  display: flex; align-items: center; gap: 10px;
}
.sys-msg::before, .sys-msg::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}
/* Game flavor messages */
.game-msg {
  color: #d4a017;
  font-style: italic;
}
.game-msg::before, .game-msg::after {
  background: rgba(212,160,23,.3);
}

/* Input area */
.input-area {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 12px 16px;
}
.msg-input-wrap {
  display: flex; gap: 10px; align-items: flex-end;
}
textarea#msgInput {
  flex: 1; background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text); font-size: 0.9rem;
  padding: 10px 14px; resize: none;
  font-family: inherit; line-height: 1.5;
  outline: none; max-height: 120px;
  transition: border-color .2s, box-shadow .2s;
}
textarea#msgInput:focus {
  border-color: var(--cyan); box-shadow: var(--glow-c);
}
textarea#msgInput::placeholder { color: var(--text3); }

.send-btn {
  width: 42px; height: 42px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  border: none; cursor: pointer; color: #fff;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; transition: transform .15s, box-shadow .2s;
}
.send-btn:hover { transform: scale(1.07); box-shadow: var(--glow-c); }
.send-btn:active { transform: scale(0.97); }

.input-meta {
  display: flex; justify-content: space-between;
  font-size: 0.7rem; color: var(--text3); margin-top: 5px; padding: 0 2px;
}
#typingIndicator { font-style: italic; color: var(--cyan); }

/* Sidebar */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg2);
  border-left: 1px solid var(--border);
  display: flex; flex-direction: column;
  flex-shrink: 0;
}
.sidebar-header {
  padding: 14px 16px 10px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.online-label { font-size: 0.75rem; font-weight: 700; color: var(--text2); letter-spacing: 0.5px; text-transform: uppercase; }
.online-count {
  background: var(--green); color: #000;
  font-size: 0.7rem; font-weight: 800;
  border-radius: 10px; padding: 1px 7px;
}
.users-list { flex: 1; overflow-y: auto; padding: 8px 0; }

.user-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 14px; cursor: pointer;
  transition: background .15s;
  position: relative;
}
.user-item:hover { background: var(--card-h); }
.user-item.me { cursor: default; }
.you-label {
  font-size: 0.62rem; color: var(--cyan);
  border: 1px solid var(--cyan); border-radius: 4px;
  padding: 0 4px; margin-left: auto;
}
.user-avatar-wrap {
  width: 32px; height: 32px; border-radius: 50%;
  overflow: hidden; border: 2px solid var(--border); flex-shrink: 0;
}
.user-avatar-wrap svg { width: 100%; height: 100%; }
.user-item:hover .user-avatar-wrap { border-color: var(--cyan); }

.user-info { min-width: 0; }
.user-name {
  font-size: 0.82rem; font-weight: 600; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.user-status {
  font-size: 0.65rem; color: var(--green);
  display: flex; align-items: center; gap: 4px;
}
.user-status::before {
  content: ''; width: 5px; height: 5px; border-radius: 50%; background: var(--green);
}
.dm-hint {
  font-size: 0.65rem; color: var(--text3); position: absolute; right: 14px; top: 50%; transform: translateY(-50%);
  opacity: 0;
}
.user-item:hover:not(.me) .dm-hint { opacity: 1; }

/* Private message header in chat */
.dm-header {
  text-align: center; padding: 12px;
  font-size: 0.82rem; color: var(--text2);
  border-bottom: 1px solid var(--border);
}
.dm-header strong { color: var(--purple); }

/* Unread badge on tab */
.tab .unread-badge {
  background: var(--red); color: #fff;
  font-size: 0.6rem; font-weight: 800;
  border-radius: 10px; padding: 1px 5px;
  margin-left: 2px;
}

/* New message toast */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--bg3); border: 1px solid var(--cyan);
  border-radius: 20px; padding: 8px 20px;
  font-size: 0.82rem; color: var(--cyan);
  box-shadow: var(--glow-c); z-index: 999;
  animation: toastIn .3s ease; pointer-events: none;
}
@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ── Language toggle ─────────────────────────────────────────────────────── */
.lang-toggle {
  display: flex; align-items: center;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3px;
  cursor: pointer;
  gap: 0;
  user-select: none;
  transition: border-color .2s, box-shadow .2s;
}
.lang-toggle:hover {
  border-color: var(--cyan);
  box-shadow: var(--glow-c);
}
.lang-toggle .lang-opt {
  padding: 4px 11px;
  border-radius: 16px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text2);
  transition: background .2s, color .2s;
  letter-spacing: 0.5px;
}
.lang-toggle .lang-opt.active {
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  color: #fff;
}
.lang-toggle-float {
  position: fixed;
  top: 14px; right: 16px;
  z-index: 100;
}

/* ── Sidebar toggle (mobile) ─────────────────────────────────────────────── */
.sidebar-toggle-btn {
  display: none;
  align-items: center; justify-content: center;
  width: 34px; height: 34px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text2);
  cursor: pointer;
  font-size: 1rem;
  transition: border-color .2s, color .2s;
  flex-shrink: 0;
}
.sidebar-toggle-btn:hover { border-color: var(--cyan); color: var(--cyan); }
.sidebar-backdrop {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 49;
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  /* Welcome */
  .welcome-card { padding: 24px 14px; }
  .logo-title { font-size: 1.8rem; }
  .avatar-grid { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .avatar-card { padding: 10px 6px 8px; }
  .avatar-svg { width: 56px; height: 56px; }

  /* Chat topbar */
  .topbar { padding: 0 10px; gap: 8px; }
  .topbar-logo span { display: none; }
  .topbar-right { gap: 6px; }
  .my-avatar-badge .my-name { display: none; }
  .leave-btn { padding: 5px 8px; font-size: 0.72rem; }

  /* Sidebar — off-canvas overlay on mobile */
  .sidebar-toggle-btn { display: flex !important; }
  .sidebar {
    position: fixed;
    top: 0; right: 0; bottom: 0;
    z-index: 50;
    width: 230px;
    transform: translateX(100%);
    transition: transform .25s ease;
    box-shadow: -4px 0 24px rgba(0,0,0,0.5);
    overflow-y: auto;
  }
  body.sidebar-open .sidebar { transform: translateX(0); }
  body.sidebar-open .sidebar-backdrop { display: block; }

  /* Messages */
  .msg-bubble { max-width: 88%; }
  .messages-area { padding: 10px; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   THEME WHEEL
   ═══════════════════════════════════════════════════════════════════════════ */

/* Trigger button */
.theme-wheel-btn {
  width: 34px; height: 34px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text2);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  transition: border-color .2s, color .2s, box-shadow .2s;
  flex-shrink: 0;
}
.theme-wheel-btn:hover { border-color: var(--cyan); color: var(--cyan); box-shadow: var(--glow-c); }

/* Overlay */
.tw-overlay {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 16px;
  background: rgba(0,0,0,0);
  backdrop-filter: blur(0px);
  z-index: 200;
  opacity: 0; pointer-events: none;
  transition: opacity .25s, background .3s, backdrop-filter .3s;
}
.tw-overlay.tw-open {
  opacity: 1; pointer-events: all;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(10px);
}

/* Title */
.tw-title {
  font-size: 0.65rem; font-weight: 800; letter-spacing: 4px;
  color: rgba(255,255,255,0.35); text-transform: uppercase;
  transform: translateY(-12px); opacity: 0;
  transition: opacity .3s .1s, transform .3s .1s;
}
.tw-overlay.tw-open .tw-title { opacity: 1; transform: translateY(0); }

/* Wheel container */
.tw-wrap {
  position: relative; width: 300px; height: 300px;
  transform: scale(0.35) rotate(-200deg);
  transition: transform .45s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.tw-overlay.tw-open .tw-wrap { transform: scale(1) rotate(0deg); }

/* SVG */
.tw-svg {
  position: absolute; top: 0; left: 0;
  width: 300px; height: 300px;
  overflow: visible;
}

/* Tick ring animation */
.tw-ticks {
  transform-origin: 150px 150px;
  animation: tw-spin 30s linear infinite;
}
@keyframes tw-spin { to { transform: rotate(360deg); } }

/* Segments */
.tw-seg {
  cursor: pointer;
  transition: filter .2s;
}
.tw-seg:hover { filter: brightness(2.2) saturate(1.4); }
.tw-seg-active { filter: brightness(1.6) saturate(1.2) !important; }

/* Theme items (HTML overlay) */
.tw-item {
  position: absolute;
  transform: translate(-50%, -50%);
  text-align: center;
  cursor: pointer;
  padding: 8px 10px 6px;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: transform .2s, border-color .2s, background .2s;
  pointer-events: all;
}
.tw-item:hover {
  transform: translate(-50%, -50%) scale(1.12);
  background: rgba(255,255,255,0.07);
}
.tw-item-active {
  border-color: rgba(255,255,255,0.2) !important;
  background: rgba(255,255,255,0.06) !important;
}
.tw-swatches {
  display: flex; gap: 3px; justify-content: center; margin-bottom: 5px;
}
.tw-swatch {
  width: 12px; height: 12px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.25);
  display: block;
}
.tw-name {
  font-size: 0.7rem; font-weight: 800; letter-spacing: 0.5px;
  color: #fff; text-shadow: 0 1px 6px rgba(0,0,0,0.9);
  white-space: nowrap;
}

/* Close button */
.tw-close {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 46px; height: 46px; border-radius: 50%;
  background: rgba(8,8,20,0.95);
  border: 1.5px solid rgba(255,255,255,0.14);
  color: rgba(255,255,255,0.45);
  cursor: pointer; font-size: 0.88rem;
  display: flex; align-items: center; justify-content: center;
  transition: border-color .2s, color .2s, box-shadow .2s;
  z-index: 2;
}
.tw-close:hover {
  border-color: rgba(255,80,60,0.8);
  color: rgba(255,80,60,0.9);
  box-shadow: 0 0 16px rgba(255,80,60,0.3);
}

/* Float group on welcome page */
.topbar-float {
  position: fixed; top: 14px; right: 16px;
  display: flex; gap: 8px; align-items: center;
  z-index: 100;
}

/* ═══════════════════════════════════════════════════════════════════════════
   SUNSET THEME OVERRIDES
   ═══════════════════════════════════════════════════════════════════════════ */

[data-theme="sunset"] .bg-grid {
  background-image:
    linear-gradient(rgba(249,96,64,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(249,96,64,0.05) 1px, transparent 1px);
}
[data-theme="sunset"] .msg-group.self .msg-bubble {
  background: rgba(122,156,200,0.18);
  border-color: rgba(122,156,200,0.3);
  border-radius: 14px 4px 14px 14px;
}
[data-theme="sunset"] .avatar-card.selected {
  background: rgba(249,96,64,0.1);
}
[data-theme="sunset"] ::-webkit-scrollbar-thumb {
  background: rgba(249,96,64,0.35);
}
[data-theme="sunset"] .tw-overlay {
  background: rgba(30,58,110,0);
}
[data-theme="sunset"] .tw-overlay.tw-open {
  background: rgba(20,40,80,0.65);
}
[data-theme="sunset"] .tw-close {
  background: rgba(240,232,220,0.95);
  border-color: rgba(30,58,110,0.2);
  color: rgba(30,58,110,0.5);
}
[data-theme="sunset"] .tw-close:hover {
  border-color: rgba(249,96,64,0.8);
  color: rgba(249,96,64,0.9);
  box-shadow: 0 0 16px rgba(249,96,64,0.2);
}

/* ═══════════════════════════════════════════════════════════════════════════
   TANKS HELP OVERLAY
   ═══════════════════════════════════════════════════════════════════════════ */

.tanks-help-btn {
  width: 34px; height: 34px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text2);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  transition: border-color .2s, color .2s, box-shadow .2s;
  flex-shrink: 0;
}
.tanks-help-btn:hover {
  border-color: #d4a017;
  color: #d4a017;
  box-shadow: 0 0 18px rgba(212,160,23,0.3);
}

.tanks-help-overlay {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0);
  backdrop-filter: blur(0px);
  z-index: 300;
  opacity: 0; pointer-events: none;
  transition: opacity .25s, background .3s, backdrop-filter .3s;
}
.tanks-help-overlay.open {
  opacity: 1; pointer-events: all;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(8px);
}

.tanks-help-modal {
  position: relative;
  background: var(--bg2);
  border: 1px solid rgba(212,160,23,0.35);
  border-radius: 16px;
  padding: 32px 36px 36px;
  max-width: 640px; width: calc(100% - 32px);
  max-height: 90vh; overflow-y: auto;
  box-shadow: 0 16px 60px rgba(0,0,0,0.7), 0 0 40px rgba(212,160,23,0.1);
  transform: scale(0.9) translateY(16px);
  transition: transform .3s cubic-bezier(0.34,1.56,0.64,1);
}
.tanks-help-overlay.open .tanks-help-modal {
  transform: scale(1) translateY(0);
}

.tanks-help-modal h2 {
  font-size: 1.5rem; font-weight: 800;
  color: var(--text);
  margin-bottom: 6px;
}

.tanks-help-sub {
  color: var(--text2); font-size: 0.88rem; margin-bottom: 24px;
}

.tanks-help-close {
  position: absolute; top: 16px; right: 16px;
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text2);
  cursor: pointer; font-size: 0.85rem;
  display: flex; align-items: center; justify-content: center;
  transition: border-color .2s, color .2s;
}
.tanks-help-close:hover { border-color: var(--red); color: var(--red); }

.tanks-help-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.tanks-cmd-block {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
}
.tanks-cmd-block.tanks-cmd-tip {
  grid-column: 1 / -1;
  border-color: rgba(212,160,23,0.25);
  background: rgba(212,160,23,0.05);
}

.tanks-cmd-label {
  font-size: 0.72rem; font-weight: 800; letter-spacing: 1.5px;
  text-transform: uppercase; color: #d4a017;
  margin-bottom: 8px;
}

.tanks-cmd-block code {
  display: inline-block;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 3px 9px;
  font-size: 0.82rem;
  color: var(--cyan);
  font-family: monospace;
  margin: 2px 2px 6px 0;
}

.tanks-cmd-block p {
  font-size: 0.82rem; color: var(--text2);
  line-height: 1.5; margin-top: 4px;
}

@media (max-width: 560px) {
  .tanks-help-grid { grid-template-columns: 1fr; }
  .tanks-help-modal { padding: 24px 18px 28px; }
}