/**
 * 1999bdt - Core Stylesheet
 * All classes use ui51- prefix for namespace isolation
 * Color palette: #F08080 | #0D1117 | #FFB3FF | #FFFFFF | #880E4F
 */

:root {
  --ui51-primary: #F08080;
  --ui51-bg: #0D1117;
  --ui51-accent: #FFB3FF;
  --ui51-text: #FFFFFF;
  --ui51-deep: #880E4F;
  --ui51-card-bg: #161B22;
  --ui51-border: #30363D;
  --ui51-muted: #8B949E;
  --ui51-success: #3FB950;
  --ui51-warning: #D29922;
  --ui51-radius: 8px;
  --ui51-radius-lg: 12px;
  --ui51-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 62.5%;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--ui51-bg);
  color: var(--ui51-text);
  line-height: 1.5rem;
  font-size: 1.4rem;
  max-width: 430px;
  margin: 0 auto;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  color: var(--ui51-primary);
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
}

/* Header */
.ui51-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  max-width: 430px;
  margin: 0 auto;
  height: 56px;
  background: linear-gradient(135deg, var(--ui51-bg), #1a1f2e);
  border-bottom: 1px solid var(--ui51-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  z-index: 1000;
}

.ui51-header-logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ui51-header-logo img {
  width: 32px;
  height: 32px;
  border-radius: 4px;
}

.ui51-header-logo span {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--ui51-primary);
}

.ui51-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ui51-btn-register {
  background: var(--ui51-primary);
  color: var(--ui51-bg);
  border: none;
  padding: 6px 14px;
  border-radius: var(--ui51-radius);
  font-size: 1.2rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.ui51-btn-register:hover {
  background: #e06060;
  transform: scale(1.05);
}

.ui51-btn-login {
  background: transparent;
  color: var(--ui51-primary);
  border: 1px solid var(--ui51-primary);
  padding: 5px 14px;
  border-radius: var(--ui51-radius);
  font-size: 1.2rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.ui51-btn-login:hover {
  background: rgba(240,128,128,0.1);
}

.ui51-menu-toggle {
  background: none;
  border: none;
  color: var(--ui51-text);
  font-size: 22px;
  cursor: pointer;
  padding: 4px;
}

/* Mobile Menu */
.ui51-mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 75%;
  max-width: 300px;
  height: 100vh;
  background: var(--ui51-bg);
  z-index: 9999;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  padding: 20px;
  border-left: 1px solid var(--ui51-border);
}

.ui51-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  z-index: 9998;
}

.ui51-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--ui51-border);
}

.ui51-menu-header h3 {
  color: var(--ui51-primary);
  font-size: 1.8rem;
}

.ui51-menu-close {
  background: none;
  border: none;
  color: var(--ui51-text);
  font-size: 24px;
  cursor: pointer;
}

.ui51-menu-links {
  list-style: none;
}

.ui51-menu-links li {
  border-bottom: 1px solid var(--ui51-border);
}

.ui51-menu-links a {
  display: block;
  padding: 12px 0;
  color: var(--ui51-text);
  font-size: 1.4rem;
  transition: color 0.2s;
}

.ui51-menu-links a:hover {
  color: var(--ui51-primary);
}

/* Carousel */
.ui51-carousel {
  position: relative;
  width: 100%;
  margin-top: 56px;
  overflow: hidden;
  aspect-ratio: 16/9;
  background: var(--ui51-card-bg);
}

.ui51-carousel-slide {
  display: none;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.ui51-carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ui51-carousel-dots {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
}

.ui51-carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
}

.ui51-carousel-dot-active {
  background: var(--ui51-primary);
}

/* Container */
.ui51-container {
  padding: 16px 12px;
}

/* Section */
.ui51-section {
  margin-bottom: 24px;
}

.ui51-section-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--ui51-primary);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ui51-deep);
}

.ui51-section-title i {
  margin-right: 6px;
}

/* Game Grid */
.ui51-game-category-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--ui51-accent);
  margin: 16px 0 10px;
  padding-left: 8px;
  border-left: 3px solid var(--ui51-primary);
}

.ui51-game-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.ui51-game-item {
  text-align: center;
  cursor: pointer;
  transition: transform 0.2s;
}

.ui51-game-item:hover {
  transform: scale(1.05);
}

.ui51-game-item img {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--ui51-radius);
  border: 1px solid var(--ui51-border);
}

.ui51-game-item span {
  display: block;
  font-size: 1.1rem;
  color: var(--ui51-muted);
  margin-top: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Card */
.ui51-card {
  background: var(--ui51-card-bg);
  border: 1px solid var(--ui51-border);
  border-radius: var(--ui51-radius-lg);
  padding: 16px;
  margin-bottom: 12px;
}

.ui51-card h3 {
  font-size: 1.6rem;
  color: var(--ui51-primary);
  margin-bottom: 8px;
}

.ui51-card p {
  color: var(--ui51-muted);
  font-size: 1.3rem;
  line-height: 1.8rem;
}

/* Promo Button */
.ui51-promo-btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--ui51-primary), var(--ui51-deep));
  color: var(--ui51-text);
  padding: 10px 24px;
  border-radius: 24px;
  font-size: 1.4rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  text-align: center;
}

.ui51-promo-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(240,128,128,0.4);
}

/* Promo text link */
.ui51-promo-link {
  color: var(--ui51-primary);
  font-weight: 700;
  cursor: pointer;
  text-decoration: underline;
}

.ui51-promo-link:hover {
  color: var(--ui51-accent);
}

/* Footer */
.ui51-footer {
  background: var(--ui51-card-bg);
  border-top: 1px solid var(--ui51-border);
  padding: 20px 12px;
  text-align: center;
}

.ui51-footer-desc {
  color: var(--ui51-muted);
  font-size: 1.2rem;
  margin-bottom: 12px;
  line-height: 1.6rem;
}

.ui51-footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 12px;
}

.ui51-footer-links a {
  background: var(--ui51-bg);
  color: var(--ui51-text);
  padding: 6px 12px;
  border-radius: var(--ui51-radius);
  font-size: 1.1rem;
  border: 1px solid var(--ui51-border);
  transition: all 0.2s;
}

.ui51-footer-links a:hover {
  border-color: var(--ui51-primary);
  color: var(--ui51-primary);
}

.ui51-footer-copy {
  color: var(--ui51-muted);
  font-size: 1.1rem;
  border-top: 1px solid var(--ui51-border);
  padding-top: 12px;
}

/* Bottom Navigation */
.ui51-bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  max-width: 430px;
  margin: 0 auto;
  height: 60px;
  background: linear-gradient(180deg, #1a1f2e, var(--ui51-bg));
  border-top: 1px solid var(--ui51-border);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 1000;
  padding: 4px 0;
}

.ui51-bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 60px;
  min-height: 52px;
  background: none;
  border: none;
  color: var(--ui51-muted);
  cursor: pointer;
  transition: all 0.2s;
  gap: 2px;
}

.ui51-bottom-nav-item i,
.ui51-bottom-nav-item .material-icons {
  font-size: 22px;
}

.ui51-bottom-nav-item span {
  font-size: 1rem;
}

.ui51-bottom-nav-item:hover,
.ui51-bottom-nav-item.ui51-nav-active {
  color: var(--ui51-primary);
  transform: scale(1.1);
}

.ui51-bottom-nav-item.ui51-nav-active::after {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ui51-primary);
  border-radius: 1px;
  margin-top: 1px;
}

/* Responsive */
@media (min-width: 769px) {
  .ui51-bottom-nav {
    display: none;
  }
}

@media (max-width: 768px) {
  main {
    padding-bottom: 80px;
  }
}

/* FAQ */
.ui51-faq-item {
  background: var(--ui51-card-bg);
  border: 1px solid var(--ui51-border);
  border-radius: var(--ui51-radius);
  margin-bottom: 8px;
  overflow: hidden;
}

.ui51-faq-q {
  padding: 12px;
  font-weight: 600;
  color: var(--ui51-text);
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.ui51-faq-a {
  padding: 0 12px 12px;
  color: var(--ui51-muted);
  font-size: 1.2rem;
  line-height: 1.6rem;
}

/* Feature list */
.ui51-feature-list {
  list-style: none;
}

.ui51-feature-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--ui51-border);
  color: var(--ui51-muted);
  font-size: 1.3rem;
}

.ui51-feature-list li:last-child {
  border-bottom: none;
}

.ui51-feature-list li i {
  color: var(--ui51-primary);
  margin-right: 8px;
}

/* Winners */
.ui51-winner-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--ui51-border);
  font-size: 1.2rem;
}

.ui51-winner-name {
  color: var(--ui51-accent);
  font-weight: 600;
}

.ui51-winner-amount {
  color: var(--ui51-success);
  font-weight: 700;
}

/* Payment icons row */
.ui51-payment-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 8px 0;
}

.ui51-payment-item {
  background: var(--ui51-bg);
  border: 1px solid var(--ui51-border);
  border-radius: var(--ui51-radius);
  padding: 6px 12px;
  font-size: 1.2rem;
  color: var(--ui51-muted);
}

/* Help page content */
.ui51-help-content h2 {
  font-size: 1.6rem;
  color: var(--ui51-primary);
  margin: 16px 0 8px;
}

.ui51-help-content h3 {
  font-size: 1.4rem;
  color: var(--ui51-accent);
  margin: 12px 0 6px;
}

.ui51-help-content p {
  color: var(--ui51-muted);
  font-size: 1.3rem;
  line-height: 1.8rem;
  margin-bottom: 8px;
}

.ui51-help-content ol,
.ui51-help-content ul {
  padding-left: 20px;
  margin-bottom: 12px;
}

.ui51-help-content li {
  color: var(--ui51-muted);
  font-size: 1.3rem;
  line-height: 1.8rem;
  margin-bottom: 4px;
}

/* Testimonials */
.ui51-testimonial {
  background: var(--ui51-card-bg);
  border: 1px solid var(--ui51-border);
  border-radius: var(--ui51-radius);
  padding: 12px;
  margin-bottom: 8px;
}

.ui51-testimonial-name {
  color: var(--ui51-accent);
  font-weight: 600;
  font-size: 1.3rem;
}

.ui51-testimonial-text {
  color: var(--ui51-muted);
  font-size: 1.2rem;
  margin-top: 4px;
}

/* App download */
.ui51-app-cta {
  background: linear-gradient(135deg, var(--ui51-deep), #2a0a20);
  border-radius: var(--ui51-radius-lg);
  padding: 16px;
  text-align: center;
}

.ui51-app-cta h3 {
  color: var(--ui51-primary);
  font-size: 1.6rem;
  margin-bottom: 8px;
}

/* Achievement badge */
.ui51-badge {
  display: inline-block;
  background: var(--ui51-deep);
  color: var(--ui51-accent);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 1.1rem;
  font-weight: 600;
}

/* Content spacing helper */
.ui51-mb-8 { margin-bottom: 8px; }
.ui51-mb-12 { margin-bottom: 12px; }
.ui51-mb-16 { margin-bottom: 16px; }
.ui51-text-center { text-align: center; }
.ui51-text-primary { color: var(--ui51-primary); }
.ui51-text-accent { color: var(--ui51-accent); }