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

:root {
  --bg: #0f1117;
  --surface: #1a1d2e;
  --surface2: #232740;
  --track-green: #0d3320;
  --track-line: #1a5c3a;
  --accent-yellow: #f5c518;
  --accent-red: #e74c3c;
  --accent-blue: #3498db;
  --accent-green: #2ecc71;
  --text: #eef0f7;
  --text-muted: #8891a8;
  --radius: 14px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

html, body {
  height: 100%;
}

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

/* ═══════════════════════════════════════
   SCREENS
═══════════════════════════════════════ */
.screen {
  display: none;
  min-height: 100vh;
}

.screen.active {
  display: flex;
}

/* ═══════════════════════════════════════
   SHARED COMPONENTS
═══════════════════════════════════════ */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 28px 32px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.btn {
  display: inline-block;
  padding: 13px 22px;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.1s, filter 0.15s;
  letter-spacing: 0.3px;
  text-align: center;
}

.btn:hover {
  filter: brightness(1.12);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
  filter: brightness(0.95);
}

.btn-red   { background: var(--accent-red);   color: #fff; }
.btn-blue  { background: var(--accent-blue);  color: #fff; }
.btn-green { background: var(--accent-green); color: #fff; }
.btn-hint  { background: var(--surface2); color: var(--accent-yellow); border: 1px solid var(--accent-yellow); font-size: 0.9rem; padding: 9px 16px; }

.btn-icon {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 8px;
  transition: background 0.15s;
}

.btn-icon:hover {
  background: rgba(255,255,255,0.1);
}

input[type="text"] {
  display: block;
  width: 100%;
  padding: 13px 16px;
  background: var(--surface2);
  border: 2px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 14px;
  transition: border-color 0.2s;
}

input[type="text"]:focus {
  outline: none;
  border-color: var(--accent-yellow);
}

input[type="text"]::placeholder {
  color: var(--text-muted);
}

.error-msg {
  color: var(--accent-red);
  font-size: 0.9rem;
  min-height: 22px;
  text-align: center;
  margin-top: 8px;
  font-weight: 600;
}

.waiting-text {
  color: var(--text-muted);
  text-align: center;
  font-size: 0.95rem;
}

/* ═══════════════════════════════════════
   HOME SCREEN
═══════════════════════════════════════ */
#home-screen {
  align-items: center;
  justify-content: center;
  padding: 20px;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(231,76,60,0.15) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 50%, rgba(52,152,219,0.15) 0%, transparent 60%),
    var(--bg);
}

.home-wrapper {
  width: 100%;
  max-width: 420px;
}

.home-logo {
  text-align: center;
  margin-bottom: 28px;
}

.logo-cars {
  font-size: 2.8rem;
  margin-bottom: 8px;
  animation: carsSlide 3s ease-in-out infinite alternate;
}

@keyframes carsSlide {
  from { letter-spacing: 2px; }
  to   { letter-spacing: 12px; }
}

.home-logo h1 {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--accent-yellow);
  text-shadow: 0 0 30px rgba(245, 197, 24, 0.5);
  letter-spacing: -0.5px;
}

.tagline {
  color: var(--text-muted);
  margin-top: 6px;
  font-size: 1rem;
}

.input-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 6px;
}

/* Tabs */
.tabs {
  display: flex;
  background: var(--surface2);
  border-radius: 10px;
  padding: 4px;
  margin-bottom: 20px;
}

.tab-btn {
  flex: 1;
  padding: 10px;
  border: none;
  background: none;
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.tab-btn.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.tab-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  line-height: 1.4;
}

.home-footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-top: 20px;
}

/* ═══════════════════════════════════════
   LOBBY SCREEN
═══════════════════════════════════════ */
#lobby-screen {
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.lobby-wrapper {
  width: 100%;
  max-width: 480px;
}

.lobby-header {
  text-align: center;
  margin-bottom: 24px;
}

.lobby-header h1 {
  font-size: 2rem;
  color: var(--accent-yellow);
  margin-bottom: 12px;
}

.room-code-box {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--surface2);
  border-radius: 12px;
  padding: 10px 20px;
  border: 1px solid rgba(245, 197, 24, 0.3);
}

.room-code-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.room-code-val {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--accent-yellow);
  letter-spacing: 6px;
  font-family: monospace;
}

.lobby-wrapper .card h3 {
  font-size: 1.05rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.count-badge {
  background: var(--accent-yellow);
  color: #111;
  font-size: 0.8rem;
  padding: 2px 9px;
  border-radius: 20px;
  font-weight: 800;
}

.player-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 60px;
  margin-bottom: 20px;
}

.lobby-player {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--surface2);
  border-radius: 10px;
  border-left: 4px solid;
  font-weight: 600;
  animation: slideIn 0.25s ease;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.you-badge {
  background: var(--accent-yellow);
  color: #111;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 10px;
  text-transform: uppercase;
}

.host-badge {
  background: var(--accent-red);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 10px;
}

.lobby-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

#start-btn {
  width: 100%;
  font-size: 1.1rem;
  padding: 15px;
}

.lobby-hint {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
}

.race-rules {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 20px;
}

.rule {
  background: var(--surface);
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 0.88rem;
  color: var(--text-muted);
  border: 1px solid rgba(255,255,255,0.05);
}

/* ═══════════════════════════════════════
   GAME SCREEN
═══════════════════════════════════════ */
#game-screen {
  flex-direction: column;
  padding: 0;
}

.game-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
  padding: 0 16px 20px;
}

.game-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0 10px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  margin-bottom: 16px;
}

.topbar-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent-yellow);
}

.room-badge {
  background: var(--surface2);
  border: 1px solid rgba(245,197,24,0.3);
  color: var(--accent-yellow);
  font-family: monospace;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 3px;
}

/* ── Race Track ── */
.track-section {
  background: var(--track-green);
  border-radius: 14px;
  padding: 16px 20px;
  margin-bottom: 16px;
  border: 1px solid rgba(46, 204, 113, 0.2);
  box-shadow: inset 0 2px 12px rgba(0,0,0,0.3);
}

.race-track {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.track-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.player-label {
  width: 110px;
  min-width: 110px;
  font-size: 0.85rem;
  font-weight: 700;
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: #fff;
}

.track-bar {
  flex: 1;
  height: 42px;
  background: var(--track-line);
  border-radius: 21px;
  position: relative;
  border: 2px solid rgba(46,204,113,0.3);
  overflow: visible;
}

/* Dashed center line */
.track-bar::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 5%;
  right: 5%;
  height: 2px;
  background: repeating-linear-gradient(
    90deg,
    rgba(255,255,255,0.15) 0px,
    rgba(255,255,255,0.15) 12px,
    transparent 12px,
    transparent 24px
  );
  transform: translateY(-50%);
  pointer-events: none;
}

.car-emoji {
  position: absolute;
  top: 50%;
  left: 4%;
  transform: translateY(-50%);
  font-size: 1.6rem;
  transition: left 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  z-index: 5;
  line-height: 1;
  filter: drop-shadow(0 3px 6px rgba(0,0,0,0.5));
  will-change: left;
}

.car-emoji.boosting {
  animation: carBoost 0.4s ease;
}

@keyframes carBoost {
  0%   { filter: drop-shadow(0 3px 6px rgba(0,0,0,0.5)); transform: translateY(-50%) scale(1); }
  40%  { filter: drop-shadow(0 0 14px rgba(245,197,24,0.9)); transform: translateY(-50%) scale(1.35); }
  100% { filter: drop-shadow(0 3px 6px rgba(0,0,0,0.5)); transform: translateY(-50%) scale(1); }
}

.finish-col {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 44px;
}

.finish-flag {
  font-size: 1.4rem;
}

.place-badge {
  background: var(--accent-yellow);
  color: #111;
  font-size: 0.72rem;
  font-weight: 900;
  padding: 2px 7px;
  border-radius: 10px;
  white-space: nowrap;
}

/* ── Riddle Panel ── */
.riddle-panel {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px 28px;
  border: 1px solid rgba(255,255,255,0.06);
  flex: 1;
}

.riddle-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.riddle-counter {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.progress-outer {
  flex: 1;
  height: 8px;
  background: var(--surface2);
  border-radius: 4px;
  overflow: hidden;
  min-width: 60px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-yellow));
  border-radius: 4px;
  transition: width 0.5s ease;
}

.riddle-question {
  font-size: 1.15rem;
  line-height: 1.65;
  color: var(--accent-yellow);
  margin-bottom: 22px;
  font-style: italic;
}

.answer-row {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
}

.answer-input {
  flex: 1;
  margin-bottom: 0 !important;
  font-size: 1.05rem;
}

.submit-btn {
  white-space: nowrap;
  flex-shrink: 0;
}

.riddle-footer {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.feedback {
  font-size: 0.95rem;
  font-weight: 700;
  min-height: 22px;
  transition: opacity 0.3s;
}

.feedback.correct { color: var(--accent-green); }
.feedback.wrong   { color: var(--accent-red); }

.hint-box {
  margin-top: 14px;
  background: rgba(245, 197, 24, 0.08);
  border: 1px solid rgba(245, 197, 24, 0.3);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 0.92rem;
  color: var(--text);
  line-height: 1.5;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hint-label {
  font-weight: 700;
  color: var(--accent-yellow);
  margin-right: 6px;
}

/* ── Finished Banner ── */
.finished-banner {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid rgba(245,197,24,0.3);
}

.finished-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.finished-trophy {
  font-size: 4rem;
  animation: trophyBounce 1s ease infinite alternate;
}

@keyframes trophyBounce {
  from { transform: translateY(0); }
  to   { transform: translateY(-8px); }
}

#finished-text {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--accent-yellow);
}

.finished-sub {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ═══════════════════════════════════════
   RESULTS SCREEN
═══════════════════════════════════════ */
#results-screen {
  align-items: center;
  justify-content: center;
  padding: 20px;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(245,197,24,0.18) 0%, transparent 60%),
    var(--bg);
}

.results-wrapper {
  width: 100%;
  max-width: 500px;
}

.results-header {
  text-align: center;
  margin-bottom: 28px;
}

.results-flags {
  font-size: 2rem;
  margin-bottom: 8px;
  animation: wave 1.5s ease-in-out infinite;
}

@keyframes wave {
  0%, 100% { transform: rotate(-5deg); }
  50%       { transform: rotate(5deg); }
}

.results-header h1 {
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--accent-yellow);
}

.results-sub {
  color: var(--text-muted);
  font-size: 1rem;
  margin-top: 6px;
}

.results-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.result-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 16px 22px;
  border: 1px solid rgba(255,255,255,0.06);
  animation: slideIn 0.35s ease both;
}

.result-item:nth-child(1) { border-left: 4px solid #ffd700; animation-delay: 0.05s; }
.result-item:nth-child(2) { border-left: 4px solid #c0c0c0; animation-delay: 0.15s; }
.result-item:nth-child(3) { border-left: 4px solid #cd7f32; animation-delay: 0.25s; }
.result-item:nth-child(n+4) { animation-delay: 0.35s; }

.result-medal {
  font-size: 2.2rem;
  width: 50px;
  text-align: center;
  flex-shrink: 0;
}

.result-place {
  font-size: 1.6rem;
  font-weight: 900;
  width: 50px;
  text-align: center;
  color: var(--text-muted);
  flex-shrink: 0;
}

.result-name {
  flex: 1;
  font-size: 1.15rem;
  font-weight: 700;
}

.results-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

#play-again-btn {
  width: 100%;
  max-width: 280px;
  padding: 15px;
  font-size: 1.05rem;
}

/* ═══════════════════════════════════════
   NOTIFICATIONS
═══════════════════════════════════════ */
#notif-container {
  position: fixed;
  top: 16px;
  right: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 9999;
  pointer-events: none;
}

.notif {
  background: var(--surface);
  border: 1px solid rgba(245, 197, 24, 0.4);
  border-radius: 12px;
  padding: 13px 20px;
  font-size: 0.92rem;
  font-weight: 600;
  max-width: 300px;
  animation: notifIn 0.3s ease, notifOut 0.4s ease 2.6s forwards;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

.notif.finish-notif {
  border-color: var(--accent-green);
  background: rgba(46, 204, 113, 0.12);
}

@keyframes notifIn {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes notifOut {
  to { opacity: 0; transform: translateX(40px); }
}

/* ═══════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════ */
@media (max-width: 600px) {
  .player-label {
    width: 80px;
    min-width: 80px;
    font-size: 0.78rem;
  }

  .riddle-panel {
    padding: 18px 16px;
  }

  .answer-row {
    flex-direction: column;
  }

  .submit-btn {
    width: 100%;
  }

  .card {
    padding: 20px 18px;
  }

  .home-logo h1 {
    font-size: 2.2rem;
  }
}