* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  padding: 0;
  color: #e0e6ed;
  font-family: "Poppins", sans-serif;
  background:
    radial-gradient(circle at 10% 20%, rgba(23, 32, 49, .8), transparent 40%),
    radial-gradient(circle at 90% 30%, rgba(35, 45, 65, .7), transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(23, 32, 49, .6), transparent 60%),
    radial-gradient(circle at 30% 50%, rgba(45, 55, 75, .7), transparent 70%),
    radial-gradient(circle at 70% 10%, rgba(23, 32, 49, .8), transparent 80%);
}

button,
a {
  font: inherit;
}

.container {
  width: 100%;
  max-width: 450px;
  min-height: 100vh;
  margin: 0 auto;
  padding: 0 10px 10px;
  background: #172031;
  box-shadow: 0 20px 40px rgba(0, 0, 0, .3);
  position: relative;
  overflow: hidden;
}

.header {
  height: 2px;
}

.ads-container {
  position: relative;
  width: 100%;
  max-width: 100%;
  margin: 0 auto 2px;
  padding-top: 0;
  text-align: center;
}


.ads {
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, .05);
}

.custom-gpt-ad {
  display: flex;
  height: 92px;
  max-height: 92px;
  overflow: hidden;
  align-items: center;
  justify-content: center;
  background: transparent !important;
  background-color: transparent !important;
}

.custom-gpt-ad ins {
  width: 100%;
  height: 90px !important;
  max-height: 90px !important;
  overflow: hidden;
  background: transparent !important;
  background-color: transparent !important;
}

.ad-placeholder {
  display: flex;
  width: min(100%, 336px);
  min-height: 90px;
  align-items: center;
  justify-content: center;
  border: 1px dashed #536176;
  border-radius: 5px;
  color: #728096;
  background: #131c2b;
  font-size: 11px;
  letter-spacing: .08em;
}

.ads-label {
  margin: 5px 0 10px;
  color: #f0e7e7;
  text-align: center;
  font-size: 12px;
  text-transform: uppercase;
}

.quiz-card {
  position: relative;
  display: block;
  width: 100%;
  max-width: 100%;
  margin: 60px auto 15px;
  padding: 30px 10px 15px;
  border-radius: 16px;
  background: #3b4559;
}

.score-display {
  display: none;
  margin-bottom: 20px;
  text-align: center;
  font-size: 1.2rem;
}

.score-number {
  color: #ffd700;
  font-size: 2rem;
  font-weight: 700;
}

.question-counter {
  position: absolute;
  z-index: 10;
  top: -23px;
  left: 50%;
  display: block;
  width: 100%;
  max-width: 150px;
  margin: 0 auto;
  padding: 5px;
  transform: translate(-50%, -50%);
  border: 4px solid #3b4559;
  border-radius: 50px;
  background: #172031;
  text-align: center;
  font-size: .9rem;
}

.question {
  min-height: 58px;
  margin: 18px 0 25px;
  text-align: center;
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.4;
}

.options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 10px;
}

.option {
  position: relative;
  display: flex;
  width: 100%;
  min-height: 45px;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 0;
  border-radius: 6px;
  padding: 10px;
  color: #fff;
  background: #172031;
  text-align: center;
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
  transition: transform .2s ease, background .2s ease;
}

.option:hover:not(:disabled) {
  transform: translateY(-2px);
  background: #222d40;
}

.option.selected {
  color: #fff;
  background: #ff6b35;
}

.option.correct {
  color: #fff;
  background: #10b981;
}

.option.wrong {
  color: #fff;
  background: #ef4444;
}

.option:disabled {
  cursor: default;
}

.answer-message {
  min-height: 26px;
  padding: 3px 4px 8px;
  color: #d8dee9;
  text-align: center;
  font-size: 12px;
}

.progress-bar {
  width: 100%;
  height: 6px;
  margin: 5px 0 0;
  overflow: hidden;
  border-radius: 3px;
  background: rgba(255, 255, 255, .2);
}

.progress-fill {
  width: 0;
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, #ffd700, #ffed4e);
  transition: width .5s ease;
}

.margin-top-20px {
  margin-top: 20px;
}

.bottom-content {
  margin-top: 15px;
}

.featured-section,
.how-to-play,
.fact_box {
  margin: 5px 0;
  border-radius: 10px;
  padding: 20px;
  background: #3b4559;
}

.featured-section h3,
.how-to-play h3 {
  margin: 0 0 15px;
  color: #fff;
  font-size: 16px;
}

.featured-section h3 {
  text-align: center;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 15px;
  margin-top: 15px;
}

.feature-item {
  padding: 15px;
  border-radius: 8px;
  color: #fff;
  background: #172031;
  text-align: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, .1);
}

.feature-item h5 {
  margin: 0 0 8px;
  color: #fff;
}

.feature-item p {
  margin: 0;
  color: #a09e9e;
  font-size: .9rem;
}

.fact_box {
  border-radius: 16px;
  padding: 15px;
  text-align: center;
}

.fact_box h5 {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 600;
}

.fact_box p {
  margin: 0;
}

.play-steps {
  margin-bottom: 0;
  padding-left: 20px;
}

.play-steps li {
  margin-bottom: 10px;
  color: #fff;
}

.footer-links {
  margin: 30px 0 20px;
  padding: 10px;
  text-align: center;
  font-size: 12px;
}

.footer-links a {
  display: inline-block;
  margin: 4px 10px;
  color: #00d4ff;
  text-decoration: none;
}

.ads-popup-overlay {
  position: fixed;
  z-index: 9999;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  visibility: visible;
  background: rgba(0, 0, 0, .7);
}

.ads-popup-overlay[hidden] {
  display: none;
}

.ads-popup {
  position: relative;
  width: min(100%, 450px);
  min-height: 370px;
  border-radius: 14px;
  padding: 25px 20px;
  background: #fff;
  text-align: center;
  box-shadow: 0 8px 30px rgba(0, 0, 0, .25);
}

.close-wrap {
  min-height: 36px;
  margin-bottom: 8px;
}

.ads-close-btn {
  position: absolute;
  top: 8px;
  right: 12px;
  display: block;
  border: 0;
  border-radius: 6px;
  padding: 5px 10px;
  color: #fff;
  background: #2563eb;
  cursor: pointer;
}

.ads-close-btn:disabled {
  display: none;
}

.ads-loading {
  position: absolute;
  top: 8px;
  left: 12px;
  border-radius: 6px;
  padding: 5px 10px;
  color: #333;
  font-size: 13px;
}

.interstitial-ad {
  min-height: 280px;
}

.interstitial-ad .ad-placeholder {
  min-height: 280px;
  color: #8a8f98;
  background: #f3f4f6;
}

.popup-ad-label {
  margin-top: 5px;
  color: #333;
  font-size: 12px;
  text-transform: uppercase;
}

/* Result page */
.result-container {
  margin: 10px auto;
  padding: 2px;
  border-radius: 12px;
  color: #fff;
  background: #1a2332;
}

.result_box {
  margin-bottom: 5px;
  border-radius: 16px;
  padding: 25px 20px;
  background: #2a3446;
  text-align: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, .3);
}

.winner-art {
  width: 145px;
  height: 145px;
  margin: 0 auto 15px;
  border-radius: 50%;
  font-size: 85px;
  line-height: 145px;
  background: radial-gradient(circle, #ffe769, #ffb540 55%, transparent 56%);
}

.result_box h3 {
  margin: 10px 0 22px;
  color: #ffd700;
  font-size: 20px;
}

.coin_set {
  color: #00d4ff;
  font-weight: 700;
}

.play_now_btn {
  display: inline-block;
  border: 0;
  border-radius: 25px;
  padding: 10px 25px;
  color: #1a1a1a;
  background: linear-gradient(45deg, #ffd700, #ffed4e);
  text-decoration: none;
  font-weight: 600;
}

.quiz_rules {
  border-radius: 16px;
  padding: 25px;
  background: #2a3446;
  box-shadow: 0 4px 10px rgba(0, 0, 0, .3);
}

.quiz_rules h3 {
  display: inline-block;
  margin: 0 0 15px;
  border-bottom: 2px solid #00d4ff;
  padding-bottom: 5px;
  color: #00d4ff;
  font-size: 20px;
}

.quiz_rules_set {
  margin: 0 auto;
  padding-left: 20px;
  color: #e0e6ed;
  line-height: 1.6;
}

.quiz_rules_set li {
  margin-bottom: 10px;
}

.popup-overlay {
  position: fixed;
  z-index: 1000;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, .9);
}

.popup-overlay[hidden] {
  display: none;
}

.popup-box {
  position: relative;
  width: min(90%, 480px);
  border: 1px solid #fff;
  border-radius: 15px;
  padding: 40px;
  color: #fff;
  background: #111827;
  text-align: center;
}

.popup-close {
  position: absolute;
  top: 15px;
  right: 15px;
  border: 0;
  color: #fff;
  background: none;
  font-size: 22px;
  cursor: pointer;
}

.coin-art {
  margin: 5px auto 15px;
  font-size: 70px;
}

.new-reward {
  color: #ffb540;
  font-size: 18px;
}

.get-coins {
  font-size: 26px;
}

.popup-box p {
  margin-bottom: 25px;
  color: #9ca3af;
}

.claim-button {
  width: 100%;
  border: 0;
  border-radius: 1.5rem;
  padding: 18px 20px;
  color: #000;
  background: #ffb540;
  font-weight: 700;
  cursor: pointer;
}

@media (max-width: 480px) {
  .quiz-card {
    padding: 5px;
  }

  .question {
    padding-top: 12px;
    font-size: 1.1rem;
  }

  .option {
    padding: 12px 8px;
    font-size: .9rem;
  }

  .popup-box {
    width: 97%;
    padding: 24px 12px;
  }
}

/* Start/category page */
.start-container {
  min-height: calc(100vh - 20px);
}

.quiz-category {
  position: relative;
}

.start-top-bar {
  position: relative;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 15px;
  padding: 5px 10px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, .2);
}

.menu-btn {
  display: flex;
  width: 45px;
  height: 45px;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 12px;
  color: #fff;
  background: rgba(255, 255, 255, .2);
  font-size: 24px;
  cursor: pointer;
}

.start-logo {
  margin: 0;
  color: #ffb540;
  font-size: 28px;
}

.start-coins {
  display: flex;
  align-items: center;
  gap: 6px;
  border: 2px solid #ffb540;
  border-radius: 25px;
  padding: 6px 13px;
  color: #fff;
  background: rgba(255, 255, 255, .2);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
}

.sidebar {
  position: absolute;
  z-index: 1001;
  top: 0;
  bottom: 0;
  left: -300px;
  width: 280px;
  overflow-y: auto;
  background: linear-gradient(180deg, #1a1a2e, #16213e);
  box-shadow: 2px 0 20px rgba(0, 0, 0, .3);
  transition: left .3s ease;
}

.sidebar.open {
  left: 0;
}

.sidebar-header {
  position: relative;
  padding: 25px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
  background: rgba(255, 255, 255, .05);
}

.sidebar-header h2 {
  margin: 0 0 5px;
}

.sidebar-header p {
  margin: 0;
  color: #a0a0a0;
  font-size: 14px;
}

.close-sidebar-btn {
  position: absolute;
  top: 20px;
  right: 10px;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 10px;
  color: #fff;
  background: rgba(255, 255, 255, .15);
  font-size: 28px;
  cursor: pointer;
}

.sidebar-menu {
  padding: 20px 0;
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 15px;
  border-left: 3px solid transparent;
  padding: 15px 20px;
  color: #fff;
  text-decoration: none;
}

.menu-item:hover {
  border-left-color: #667eea;
  background: rgba(255, 255, 255, .1);
}

.sidebar-footer {
  border-top: 1px solid rgba(255, 255, 255, .1);
  background: rgba(0, 0, 0, .2);
}

.sidebar-overlay {
  position: absolute;
  z-index: 1000;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  background: rgba(0, 0, 0, .5);
  transition: opacity .3s ease;
}

.sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

.category-bar {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 2px;
}

.category-arrow {
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  color: #fff;
  background: transparent;
  cursor: pointer;
}

.category-scroll {
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
}

.category-scroll::-webkit-scrollbar {
  display: none;
}

.category-tabs {
  display: flex;
  gap: 10px;
  padding: 0 5px;
}

.category-tab {
  border: 0;
  border-radius: 25px;
  padding: 6px;
  color: #555;
  background: #f0f0f0;
  white-space: nowrap;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
}

.category-tab.active {
  color: #fff;
  background: #ffb540;
}

.quiz-list {
  padding: 10px;
}

.start-quiz-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  overflow: hidden;
  margin: 10px 0;
  border: 1px solid rgba(173, 173, 173, .6);
  border-radius: 20px;
  padding: 15px;
  color: #fff;
  background: transparent;
  text-decoration: none;
  box-shadow: 0 8px 25px rgba(0, 0, 0, .15);
  transition: transform .25s ease;
}

.start-quiz-card[hidden] {
  display: none;
}

.start-quiz-card::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: 100%;
  background: #ffb540;
  content: "";
}

.start-quiz-card:hover {
  transform: translateY(-4px);
}

.quiz-card-icon {
  display: flex;
  flex: 0 0 75px;
  width: 75px;
  height: 75px;
  align-items: center;
  justify-content: center;
  border-radius: 15px;
  font-size: 38px;
}

.contest-details {
  min-width: 0;
  flex: 1;
}

.contest-category {
  margin: 0;
  color: #ffb540;
  font-size: 10px;
  font-weight: 600;
  line-height: 1.4;
  text-transform: uppercase;
}

.contest-details h3 {
  margin: 5px 0 8px;
  color: #fff;
  font-size: 18px;
}

.entry-fee {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border-radius: 50px;
  padding: 3px 8px;
  background: rgba(128, 128, 128, .26);
  font-size: 12px;
}

.play-circle {
  display: flex;
  flex: 0 0 52px;
  width: 52px;
  height: 52px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: #fff;
  background: #ffb540;
  box-shadow: 0 4px 15px rgba(102, 126, 234, .4);
}

.start-list-ad {
  margin: 18px 0;
}

.insufficient-overlay {
  position: fixed;
  z-index: 9999;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 15px;
  background: rgba(0, 0, 0, .7);
  backdrop-filter: blur(5px);
}

.insufficient-overlay[hidden] {
  display: none;
}

.insufficient-box {
  width: min(100%, 400px);
  border-radius: 25px;
  padding: 35px;
  color: #fff;
  background: #172031;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, .4);
}

.insufficient-icon {
  font-size: 65px;
}

.insufficient-box h2 {
  margin: 5px 0 10px;
}

.insufficient-box > p {
  color: #ffd700;
  line-height: 1.5;
}

.reward-highlight {
  margin: 20px 0 25px;
  border-radius: 15px;
  padding: 15px;
  color: #333;
  background: linear-gradient(135deg, #ffd700, #ffed4e);
  font-size: 15px;
  font-weight: 700;
}

.popup-buttons {
  display: flex;
  gap: 12px;
}

.popup-buttons button {
  border: 0;
  border-radius: 50px;
  padding: 13px 16px;
  font-weight: 700;
  cursor: pointer;
}

.cancel-popup {
  flex: 1;
  color: #666;
  background: #e0e0e0;
}

.watch-popup {
  flex: 2;
  color: #fff;
  background: linear-gradient(135deg, #f093fb, #f5576c);
}

@media (max-width: 400px) {
  .start-logo {
    font-size: 21px;
  }

  .start-coins {
    padding: 5px 9px;
    font-size: 14px;
  }

  .quiz-card-icon {
    flex-basis: 55px;
    width: 55px;
    height: 55px;
    font-size: 30px;
  }

  .contest-details h3 {
    font-size: 15px;
  }

  .play-circle {
    flex-basis: 44px;
    width: 44px;
    height: 44px;
  }
}

/* Category quiz */
.play-quiz-wrapper {
  width: 100%;
  max-width: 450px;
  margin: 10px auto;
  border-radius: 10px;
  padding: 20px;
  background: #1e293b;
  text-align: center;
}

.play-quiz-wrapper h2 {
  margin: 0 0 6px;
  color: #f59e0b;
  font-size: 18px;
}

.play-quiz-wrapper h3 {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 0 15px;
  color: #d1d5db;
  font-size: 14px;
  font-weight: 400;
}

.play-scoreboard {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.play-score-circle {
  display: flex;
  width: 35px;
  height: 35px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 18px;
  font-weight: 700;
}

.play-correct {
  background: #16a34a;
}

.play-wrong {
  background: #dc2626;
}

.play-timer {
  width: 70px;
  height: 70px;
  margin: 10px auto;
  border: 4px solid #f59e0b;
  border-radius: 50%;
  color: #fbbf24;
  font-size: 18px;
  font-weight: 700;
  line-height: 62px;
}

.play-question-box {
  margin-top: 15px;
  border-radius: 10px;
  padding: 20px;
  background: #334155;
}

.play-question-count {
  display: inline-block;
  margin-bottom: 10px;
  border-radius: 12px;
  padding: 4px 10px;
  color: #fff;
  background: #111827;
  font-size: 12px;
}

.play-question-text {
  min-height: 48px;
  margin-bottom: 15px;
  font-size: 16px;
}

.play-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.play-option {
  min-height: 45px;
  border: 0;
  border-radius: 8px;
  padding: 10px;
  color: #fff;
  background: #1e293b;
  cursor: pointer;
}

.play-option:hover:not(:disabled) {
  background: #475569;
}

.play-option.correct {
  background: #16a34a;
}

.play-option.wrong {
  background: #dc2626;
}

.play-score-text {
  margin-top: 15px;
  color: #fbbf24;
  font-weight: 700;
}

.score-home {
  color: #fff;
  text-decoration: none;
}

.category-result-title {
  margin-bottom: 18px;
  color: #cbd5e1;
}

.category-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 22px;
}

.category-stats div {
  display: grid;
  gap: 4px;
  border-radius: 10px;
  padding: 12px 5px;
  background: #172031;
}

.category-stats strong {
  color: #ffd700;
  font-size: 18px;
}

.category-stats span {
  color: #aab4c4;
  font-size: 11px;
}



/* Modern dark theme */
:root {
  color-scheme: dark;
  --theme-bg: #080b12;
  --theme-shell: #0d131f;
  --theme-panel: #121a28;
  --theme-panel-raised: #182235;
  --theme-input: #0b111c;
  --theme-border: rgba(148, 163, 184, .16);
  --theme-border-strong: rgba(129, 140, 248, .42);
  --theme-text: #f8fafc;
  --theme-muted: #94a3b8;
  --theme-primary: #818cf8;
  --theme-primary-strong: #6366f1;
  --theme-secondary: #22d3ee;
  --theme-success: #22c55e;
  --theme-danger: #f43f5e;
  --theme-radius: 18px;
  --theme-shadow: 0 18px 45px rgba(0, 0, 0, .32);
}

body {
  color: var(--theme-text);
  background:
    radial-gradient(circle at 12% 10%, rgba(99, 102, 241, .16), transparent 28%),
    radial-gradient(circle at 88% 28%, rgba(34, 211, 238, .1), transparent 30%),
    linear-gradient(160deg, #060910 0%, var(--theme-bg) 55%, #0a101b 100%);
  background-attachment: fixed;
}

.container {
  background: rgba(13, 19, 31, .96);
  box-shadow:
    0 0 0 1px rgba(148, 163, 184, .06),
    0 30px 80px rgba(0, 0, 0, .42);
}

.quiz-card,
.featured-section,
.how-to-play,
.fact_box,
.result-container,
.result_box,
.quiz_rules,
.play-quiz-wrapper,
.play-question-box,
.start-quiz-card {
  border: 1px solid var(--theme-border);
  background: var(--theme-panel);
  box-shadow: var(--theme-shadow);
}

.quiz-card {
  border-radius: 22px;
  padding: 32px 14px 18px;
}

.question-counter {
  border-color: var(--theme-panel);
  color: #dbeafe;
  background: linear-gradient(135deg, #202b42, #131c2c);
  box-shadow: 0 8px 22px rgba(0, 0, 0, .3);
}

.question,
.featured-section h3,
.how-to-play h3,
.feature-item h5,
.fact_box h5,
.contest-details h3 {
  color: var(--theme-text);
}

.option,
.play-option {
  border: 1px solid var(--theme-border);
  color: #e2e8f0;
  background: var(--theme-input);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .025);
}

.option:hover:not(:disabled),
.play-option:hover:not(:disabled) {
  border-color: var(--theme-border-strong);
  background: #172137;
  box-shadow: 0 8px 22px rgba(0, 0, 0, .22);
}

.option.selected {
  background: var(--theme-primary-strong);
}

.option.correct,
.play-option.correct,
.play-correct {
  background: var(--theme-success);
}

.option.wrong,
.play-option.wrong,
.play-wrong {
  background: var(--theme-danger);
}

.progress-bar {
  background: rgba(148, 163, 184, .15);
}

.progress-fill {
  background: linear-gradient(90deg, var(--theme-primary), var(--theme-secondary));
  box-shadow: 0 0 18px rgba(129, 140, 248, .45);
}

.score-number,
.result_box h3,
.play-score-text,
.category-stats strong {
  color: var(--theme-secondary);
}

.feature-item {
  border: 1px solid var(--theme-border);
  background: var(--theme-input);
  box-shadow: none;
}

.feature-item p,
.fact_box p,
.category-result-title,
.answer-message {
  color: var(--theme-muted);
}

.footer-links a,
.contest-category,
.quiz_rules h3 {
  color: var(--theme-secondary);
}

.ad-placeholder {
  border-color: rgba(148, 163, 184, .2);
  color: #64748b;
  background:
    linear-gradient(135deg, rgba(129, 140, 248, .035), rgba(34, 211, 238, .025)),
    #0a101a;
}

.ads-label {
  color: #64748b;
  letter-spacing: .12em;
}

.start-top-bar {
  margin: 0 -10px 16px;
  border-bottom: 1px solid var(--theme-border);
  padding: 12px 14px;
  background: rgba(10, 16, 27, .78);
  box-shadow: 0 12px 30px rgba(0, 0, 0, .18);
  backdrop-filter: blur(16px);
}

.start-logo {
  color: var(--theme-text);
  letter-spacing: -.04em;
}

.menu-btn,
.close-sidebar-btn {
  border: 1px solid var(--theme-border);
  color: #e2e8f0;
  background: #151e2e;
}

.menu-btn:hover,
.close-sidebar-btn:hover {
  border-color: var(--theme-border-strong);
  background: #1c2740;
}

.start-coins {
  border: 1px solid rgba(34, 211, 238, .36);
  color: #cffafe;
  background: rgba(34, 211, 238, .08);
  box-shadow: 0 0 22px rgba(34, 211, 238, .08);
}

.sidebar {
  border-right: 1px solid var(--theme-border);
  background:
    radial-gradient(circle at 30% 0, rgba(99, 102, 241, .18), transparent 28%),
    #0d1421;
}

.sidebar-header {
  border-color: var(--theme-border);
  background: rgba(255, 255, 255, .025);
}

.sidebar-header p {
  color: var(--theme-muted);
}

.sidebar-footer {
  border-color: var(--theme-border);
  background: rgba(0, 0, 0, .14);
}

.menu-item {
  color: #cbd5e1;
}

.menu-item:hover {
  border-left-color: var(--theme-primary);
  color: #fff;
  background: rgba(129, 140, 248, .09);
}

.category-arrow {
  color: var(--theme-muted);
}

.category-arrow:hover {
  color: var(--theme-text);
  background: rgba(129, 140, 248, .1);
}

.category-tab {
  border: 1px solid var(--theme-border);
  color: #94a3b8;
  background: var(--theme-input);
}

.category-tab:hover {
  color: #e2e8f0;
  border-color: rgba(129, 140, 248, .3);
}

.category-tab.active {
  border-color: transparent;
  color: #fff;
  background: linear-gradient(135deg, var(--theme-primary), var(--theme-primary-strong));
  box-shadow: 0 8px 20px rgba(99, 102, 241, .28);
}

.start-quiz-card {
  overflow: visible;
  border-radius: 20px;
  background:
    linear-gradient(135deg, rgba(129, 140, 248, .04), transparent 45%),
    var(--theme-panel);
}

.start-quiz-card::before {
  top: 18%;
  width: 3px;
  height: 64%;
  border-radius: 0 4px 4px 0;
  background: linear-gradient(var(--theme-primary), var(--theme-secondary));
}

.start-quiz-card:hover {
  border-color: rgba(129, 140, 248, .3);
  box-shadow: 0 20px 42px rgba(0, 0, 0, .35);
}

.quiz-card-icon {
  border: 1px solid var(--theme-border);
  background: linear-gradient(145deg, #1d2940, #111927);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .04);
}

.contest-category {
  color: #a5b4fc;
}

.entry-fee {
  border: 1px solid rgba(34, 211, 238, .16);
  color: #bae6fd;
  background: rgba(34, 211, 238, .07);
}

.play-circle,
.play_now_btn,
.claim-button {
  color: #fff;
  background: linear-gradient(135deg, var(--theme-primary), var(--theme-primary-strong));
  box-shadow: 0 10px 25px rgba(99, 102, 241, .3);
}

.play-circle {
  font-size: 13px;
}

.play-quiz-wrapper {
  border-radius: 20px;
  background:
    radial-gradient(circle at 50% 0, rgba(99, 102, 241, .11), transparent 32%),
    var(--theme-panel);
}

.play-quiz-wrapper h2 {
  color: #a5b4fc;
}

.play-quiz-wrapper h3 {
  color: var(--theme-muted);
}

.play-timer {
  border-color: var(--theme-primary);
  color: #c7d2fe;
  background: var(--theme-input);
  box-shadow:
    0 0 0 5px rgba(129, 140, 248, .08),
    0 0 25px rgba(99, 102, 241, .16);
}

.play-question-box {
  background: var(--theme-panel-raised);
  box-shadow: none;
}

.play-question-count {
  color: #c7d2fe;
  background: rgba(99, 102, 241, .16);
}

.result-container {
  background: transparent;
  box-shadow: none;
}

.result_box,
.quiz_rules {
  background:
    linear-gradient(145deg, rgba(129, 140, 248, .045), transparent),
    var(--theme-panel);
}

.winner-art {
  background: radial-gradient(circle, rgba(34, 211, 238, .26), rgba(99, 102, 241, .22) 52%, transparent 54%);
  filter: drop-shadow(0 0 20px rgba(129, 140, 248, .22));
}

.quiz_rules h3 {
  border-color: var(--theme-secondary);
}

.category-stats div {
  border: 1px solid var(--theme-border);
  background: var(--theme-input);
}

.popup-overlay,
.insufficient-overlay,
.ads-popup-overlay {
  background: rgba(3, 6, 12, .82);
  backdrop-filter: blur(10px);
}

.popup-box,
.insufficient-box {
  border: 1px solid var(--theme-border);
  color: var(--theme-text);
  background:
    radial-gradient(circle at 50% 0, rgba(99, 102, 241, .16), transparent 35%),
    var(--theme-panel);
  box-shadow: 0 25px 70px rgba(0, 0, 0, .55);
}

.popup-box p,
.insufficient-box > p {
  color: var(--theme-muted);
}

.new-reward {
  color: #a5b4fc;
}

.reward-highlight {
  border: 1px solid rgba(34, 211, 238, .22);
  color: #cffafe;
  background: rgba(34, 211, 238, .08);
}

.cancel-popup {
  border: 1px solid var(--theme-border) !important;
  color: #cbd5e1;
  background: #172131;
}

.watch-popup {
  color: #fff;
  background: linear-gradient(135deg, var(--theme-primary), var(--theme-primary-strong));
}

.ads-popup {
  border: 1px solid var(--theme-border);
  color: var(--theme-text);
  background: var(--theme-panel);
  box-shadow: 0 30px 80px rgba(0, 0, 0, .55);
}

.ads-loading,
.popup-ad-label {
  color: var(--theme-muted);
}

.ads-close-btn {
  background: var(--theme-primary-strong);
}

.interstitial-ad .ad-placeholder {
  color: #64748b;
  background: var(--theme-input);
}

@media (max-width: 480px) {
  .quiz-card {
    padding: 12px 8px 10px;
  }

  .question {
    padding-top: 16px;
  }

  .play-quiz-wrapper {
    padding: 14px 10px;
    margin: 8px auto;
  }

  .play-question-box {
    padding: 16px 12px;
  }

  .play-options,
  .options {
    grid-template-columns: 1fr 1fr !important;
    gap: 8px !important;
  }
}