/* ===== RESET & ROOT ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg:        #0a0d18;
  --bg2:       #111527;
  --bg3:       #181d32;
  --border:    #2a2f4e;
  --accent:    #6c63ff;
  --accent2:   #ff6584;
  --text:      #e8eaf6;
  --text2:     #8891b4;
  --success:   #2ecc71;
  --danger:    #e74c3c;
  --warn:      #f39c12;
  --radius:    12px;
  --radius-sm: 6px;
  --shadow:    0 8px 32px rgba(0,0,0,0.5);
}

html, body {
  height: 100%;
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

/* ===== SCREENS ===== */
.screen { display: none; width: 100%; min-height: 100vh; }
.screen.active { display: flex; flex-direction: column; align-items: center; justify-content: center; }
#game-screen.active { display: grid; }

/* ===== SHARED UTILS ===== */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  padding: .65rem 1.4rem;
  border: none; border-radius: var(--radius-sm);
  font-size: .95rem; font-weight: 600; cursor: pointer;
  transition: transform .1s, filter .15s, box-shadow .15s;
}
.btn:hover { filter: brightness(1.15); transform: translateY(-1px); }
.btn:active { transform: translateY(0); filter: brightness(.95); }
.btn-primary  { background: var(--accent); color: #fff; }
.btn-success  { background: var(--success); color: #fff; }
.btn-danger   { background: var(--danger); color: #fff; }
.btn-warn     { background: var(--warn); color: #fff; }
.btn-ghost    { background: transparent; color: var(--text2); border: 1px solid var(--border); }
.btn-sm       { padding: .35rem .8rem; font-size: .8rem; }

input[type=text], input[type=number], select {
  background: var(--bg3);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: .6rem .9rem;
  font-size: .95rem;
  width: 100%;
  outline: none;
  transition: border-color .2s;
}
input[type=text]:focus, input[type=number]:focus, select:focus {
  border-color: var(--accent);
}

/* ===== JOIN SCREEN ===== */
#join-screen {
  background: radial-gradient(ellipse at 30% 20%, #1a1040 0%, var(--bg) 60%);
}

.join-box {
  width: min(460px, 96vw);
  display: flex; flex-direction: column; gap: 1.2rem;
}

.game-title {
  text-align: center;
  font-size: 3rem; font-weight: 800; letter-spacing: .05em;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  text-shadow: none;
}
.game-subtitle {
  text-align: center;
  color: var(--text2); font-size: .9rem; margin-top: -.5rem;
}

.name-row {
  display: flex; gap: .6rem; align-items: center;
}
.name-row input { flex: 1; }

/* Avatar color picker */
.avatar-picker {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: .4rem;
}
.avatar-swatch {
  width: 100%; aspect-ratio: 1;
  border-radius: 50%;
  cursor: pointer;
  border: 3px solid transparent;
  transition: transform .15s, border-color .15s;
}
.avatar-swatch:hover { transform: scale(1.15); }
.avatar-swatch.selected { border-color: #fff; transform: scale(1.2); }

.picker-label { font-size: .8rem; color: var(--text2); margin-bottom: .3rem; }

/* Join action buttons */
.join-actions {
  display: flex; flex-direction: column; gap: .6rem;
}
.join-actions .btn { width: 100%; font-size: 1rem; padding: .8rem; }

/* Expandable panels */
.expand-panel {
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.expand-panel .panel-body {
  display: none;
  padding: 1rem;
  background: var(--bg3);
  flex-direction: column; gap: .7rem;
}
.expand-panel.open .panel-body { display: flex; }

/* Mode tabs in join panel */
.mode-tabs {
  display: flex; gap: .4rem; flex-wrap: wrap;
}
.mode-tab {
  padding: .4rem .8rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--bg2);
  color: var(--text2);
  cursor: pointer; font-size: .85rem;
  transition: all .15s;
}
.mode-tab:hover { border-color: var(--accent); color: var(--text); }
.mode-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* Shake animation */
@keyframes shake {
  0%,100% { transform: translateX(0); }
  20%      { transform: translateX(-8px); }
  40%      { transform: translateX(8px); }
  60%      { transform: translateX(-5px); }
  80%      { transform: translateX(5px); }
}
.shake { animation: shake .4s ease; }

/* ===== LOBBY SCREEN ===== */
#lobby-screen {
  background: radial-gradient(ellipse at 60% 10%, #0f1a3a 0%, var(--bg) 60%);
  padding: 1.5rem;
  align-items: flex-start; justify-content: flex-start;
}

.lobby-wrapper {
  width: min(900px, 98vw);
  margin: 0 auto;
  display: flex; flex-direction: column; gap: 1rem;
}

.lobby-header {
  display: flex; align-items: center; gap: .8rem; flex-wrap: wrap;
}
.lobby-header h2 { font-size: 1.4rem; font-weight: 700; }
.room-code-badge {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .35rem .8rem;
  font-size: 1.2rem; font-weight: 700; letter-spacing: .2em;
  color: var(--accent);
  cursor: pointer; user-select: all;
}
.room-code-badge:hover { background: var(--border); }

.lobby-body {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 1rem;
}

/* Players grid */
.players-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: .6rem;
}
.player-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .7rem .8rem;
  display: flex; align-items: center; gap: .6rem;
}
.player-card .avatar-dot {
  width: 34px; height: 34px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1rem; flex-shrink: 0;
}
.player-card .p-info { flex: 1; overflow: hidden; }
.player-card .p-name { font-weight: 600; font-size: .9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.player-card .p-host { font-size: .7rem; color: var(--warn); }
.kick-btn { font-size: .7rem; padding: .2rem .5rem; }

/* Lobby right column */
.lobby-right {
  display: flex; flex-direction: column; gap: .8rem;
}

/* Mode selector in lobby */
.mode-section h4 { font-size: .85rem; color: var(--text2); margin-bottom: .5rem; }

/* Chat box */
.chat-box {
  flex: 1;
  display: flex; flex-direction: column;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-height: 200px;
  max-height: 320px;
}
.chat-box .chat-title {
  padding: .5rem .8rem;
  font-size: .8rem; font-weight: 700; color: var(--text2);
  border-bottom: 1px solid var(--border);
}
.chat-messages {
  flex: 1; overflow-y: auto;
  padding: .5rem .7rem;
  display: flex; flex-direction: column; gap: .25rem;
  scroll-behavior: smooth;
}
.chat-msg {
  font-size: .8rem; line-height: 1.35;
  word-break: break-word;
}
.chat-msg .chat-sender { font-weight: 700; }
.chat-msg.system-msg { color: var(--text2); font-style: italic; }
.chat-input-row {
  display: flex; gap: .4rem;
  padding: .4rem .5rem;
  border-top: 1px solid var(--border);
}
.chat-input-row input {
  flex: 1; padding: .4rem .6rem; font-size: .8rem;
}
.chat-input-row button {
  padding: .4rem .7rem; font-size: .8rem;
  background: var(--accent); color: #fff;
  border: none; border-radius: var(--radius-sm); cursor: pointer;
}

/* Lobby bottom */
.lobby-bottom {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
}
.player-count { color: var(--text2); font-size: .9rem; }

/* Leaderboard */
.lb-table { width: 100%; border-collapse: collapse; font-size: .82rem; }
.lb-table th { color: var(--text2); text-align: left; padding: .3rem .4rem; border-bottom: 1px solid var(--border); }
.lb-table td { padding: .3rem .4rem; border-bottom: 1px solid #1a1e2e; }
.lb-table tr:last-child td { border-bottom: none; }
.lb-table .rank-1 td:first-child { color: #f1c40f; }
.lb-table .rank-2 td:first-child { color: #aaa; }
.lb-table .rank-3 td:first-child { color: #cd7f32; }

/* ===== COUNTDOWN SCREEN ===== */
#countdown-screen {
  background: var(--bg);
}
.countdown-number {
  font-size: 10rem; font-weight: 900;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  line-height: 1;
}
@keyframes countPop {
  0%   { transform: scale(2); opacity: 0; }
  30%  { transform: scale(1); opacity: 1; }
  80%  { transform: scale(1); opacity: 1; }
  100% { transform: scale(.5); opacity: 0; }
}
.countdown-number.pop { animation: countPop .9s ease forwards; }
.countdown-go {
  font-size: 4rem; font-weight: 900; color: var(--success);
  animation: countPop .6s ease forwards;
}

/* ===== GAME SCREEN ===== */
#game-screen {
  grid-template-rows: auto 1fr;
  grid-template-columns: 1fr;
  min-height: 100vh;
  gap: 0;
  align-items: start;
  justify-content: start;
  padding: 0;
}

/* Game header */
.game-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: .6rem 1rem;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
  gap: .8rem; flex-wrap: wrap;
}
.game-timer {
  font-size: 1.8rem; font-weight: 900;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  min-width: 3rem; text-align: center;
}
.game-timer.urgent { color: var(--danger); animation: pulse 1s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .5; } }

.game-title-small {
  font-size: 1.1rem; font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.game-mode-badge {
  font-size: .75rem; color: var(--text2);
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 4px; padding: .15rem .5rem;
}
.my-score-display {
  font-size: 1.3rem; font-weight: 700; color: var(--accent);
}
.my-score-display span { font-size: .8rem; color: var(--text2); font-weight: 400; }

/* Game main area */
.game-main {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 0;
  flex: 1;
  min-height: 0;
}

/* Game canvas area */
.game-canvas-wrap {
  position: relative;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  min-height: 520px;
}
#game-canvas {
  display: block;
  cursor: crosshair;
  border-right: 1px solid var(--border);
  max-width: 100%;
  max-height: calc(100vh - 100px);
}
#game-canvas.frozen-cursor { cursor: not-allowed; }

/* Freeze overlay */
.freeze-overlay {
  position: absolute; inset: 0;
  background: rgba(52, 152, 219, 0.25);
  display: none; align-items: center; justify-content: center;
  font-size: 2.5rem; font-weight: 900;
  color: #74d7ff;
  text-shadow: 0 0 30px rgba(116,215,255,.8);
  z-index: 5;
  pointer-events: all;
}
.freeze-overlay.active { display: flex; }
@keyframes iceShimmer {
  0%,100% { background: rgba(52,152,219,.25); }
  50%      { background: rgba(52,152,219,.4); }
}
.freeze-overlay.active { animation: iceShimmer 1s infinite; }

/* Game sidebar */
.game-sidebar {
  background: var(--bg2);
  border-left: 1px solid var(--border);
  display: flex; flex-direction: column;
  min-height: 0;
  height: calc(100vh - 60px);
  overflow: hidden;
}
.sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
}
.sidebar-tab {
  flex: 1; padding: .6rem;
  text-align: center; font-size: .85rem; font-weight: 600;
  cursor: pointer; color: var(--text2);
  border-bottom: 2.5px solid transparent;
  transition: color .15s, border-color .15s;
}
.sidebar-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.sidebar-panel { display: none; flex: 1; overflow: hidden; flex-direction: column; }
.sidebar-panel.active { display: flex; }

/* Scores panel */
.scores-list {
  flex: 1; overflow-y: auto;
  padding: .5rem;
  display: flex; flex-direction: column; gap: .4rem;
}
.score-row {
  display: flex; align-items: center; gap: .5rem;
  padding: .4rem .5rem;
  background: var(--bg3); border-radius: var(--radius-sm);
  font-size: .85rem;
}
.score-row .avatar-dot {
  width: 28px; height: 28px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .75rem; font-weight: 700; flex-shrink: 0;
}
.score-row .s-name { flex: 1; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.score-row .s-score { font-weight: 700; color: var(--accent); }
.score-row.me { background: #1e1a40; border: 1px solid var(--accent); }
.score-row .combo-badge {
  font-size: .65rem; background: var(--warn);
  color: #000; border-radius: 3px; padding: .1rem .3rem; font-weight: 700;
}

/* Spectating badge */
.spectating-badge {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: .3rem .8rem;
  font-size: .8rem; color: var(--text2); text-align: center;
}

/* Combo indicator */
#combo-indicator {
  position: fixed;
  top: 80px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, #f39c12, #e74c3c);
  color: #fff;
  padding: .5rem 1.2rem;
  border-radius: 100px;
  font-size: 1.2rem; font-weight: 900;
  pointer-events: none;
  z-index: 100;
  opacity: 0;
  transition: opacity .2s;
}
#combo-indicator.show { opacity: 1; }
@keyframes comboBounce {
  0%   { transform: translateX(-50%) scale(.6); opacity: 0; }
  40%  { transform: translateX(-50%) scale(1.15); opacity: 1; }
  100% { transform: translateX(-50%) scale(1); opacity: 1; }
}
#combo-indicator.show { animation: comboBounce .3s ease forwards; }

/* Notification toast */
#toast {
  position: fixed; bottom: 2rem; left: 50%; transform: translateX(-50%);
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 100px; padding: .55rem 1.4rem;
  font-size: .9rem; font-weight: 600;
  z-index: 999; pointer-events: none;
  opacity: 0; transition: opacity .3s;
  max-width: 90vw; text-align: center;
}
#toast.show { opacity: 1; }

/* ===== DOT STYLES (canvas-drawn, but for timer bar reference) ===== */
/* Dot timer bar is drawn on canvas */

/* ===== RESULTS SCREEN ===== */
#results-screen {
  background: radial-gradient(ellipse at 50% 0%, #12082a 0%, var(--bg) 60%);
  padding: 2rem 1rem;
  gap: 1.5rem;
}

.results-title {
  font-size: 2.5rem; font-weight: 900;
  text-align: center;
  background: linear-gradient(135deg, #f1c40f, var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.results-subtitle { color: var(--text2); text-align: center; font-size: .9rem; }

.results-ranking {
  display: flex; flex-direction: column; gap: .5rem;
  width: min(480px, 96vw);
}
.result-row {
  display: flex; align-items: center; gap: .8rem;
  padding: .7rem 1rem;
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.result-rank { font-size: 1.5rem; width: 2.2rem; text-align: center; }
.result-row .avatar-dot {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
}
.result-name { flex: 1; font-weight: 600; }
.result-score { font-size: 1.1rem; font-weight: 700; color: var(--accent); }
.result-row.winner { background: #1e1a10; border-color: #f1c40f; }

.results-lb { width: min(480px, 96vw); }
.results-lb h3 { font-size: 1rem; margin-bottom: .6rem; color: var(--text2); }
.return-msg { color: var(--text2); font-size: .9rem; }

/* ===== SCROLLBARS ===== */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ===== VOTE KICK TOAST ===== */
.kick-notice {
  background: var(--danger);
  color: #fff;
  padding: .4rem 1rem;
  border-radius: 100px;
  font-size: .85rem;
  margin-top: .3rem;
}

/* ===== MOBILE RESPONSIVE ===== */
@media (max-width: 700px) {
  .lobby-body { grid-template-columns: 1fr; }
  .lobby-right { order: -1; }
  .game-main { grid-template-columns: 1fr; grid-template-rows: 1fr auto; }
  .game-sidebar { height: 200px; }
  #game-canvas { width: 100% !important; height: auto !important; }
  .game-timer { font-size: 1.3rem; }
  .avatar-picker { grid-template-columns: repeat(8, 1fr); }
}