/**
 * jljl9 Layout Stylesheet - Mobile-first responsive design
 * All classes prefixed with uibf- for namespace isolation
 * Color palette: #1B263B (navy), #004D40 (teal), #40E0D0 (turquoise), #E5E5E5 (grey)
 */

/* === CSS Variables === */
:root {
  --uibf-bg: #1B263B;
  --uibf-bg-light: #243447;
  --uibf-bg-card: #1e2f45;
  --uibf-secondary: #004D40;
  --uibf-secondary-light: #00695C;
  --uibf-accent: #40E0D0;
  --uibf-accent-hover: #5EF5E5;
  --uibf-text: #E5E5E5;
  --uibf-text-muted: #a0b4c8;
  --uibf-text-dim: #6b8299;
  --uibf-border: #2a3f57;
  --uibf-shadow: rgba(0, 0, 0, 0.3);
  --uibf-radius: 8px;
  --uibf-radius-lg: 12px;
  --uibf-transition: 0.25s ease;
  --uibf-max-width: 430px;
  --uibf-header-h: 52px;
  --uibf-bnav-h: 58px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  background-color: var(--uibf-bg);
  color: var(--uibf-text);
  line-height: 1.6;
  max-width: var(--uibf-max-width);
  margin: 0 auto;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--uibf-accent);
  text-decoration: none;
  transition: color var(--uibf-transition);
}

a:hover {
  color: var(--uibf-accent-hover);
}

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

/* === Header === */
.uibf-header {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--uibf-max-width);
  height: var(--uibf-header-h);
  background: var(--uibf-bg-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  z-index: 1000;
  border-bottom: 1px solid var(--uibf-border);
}

.uibf-logo-area {
  display: flex;
  align-items: center;
  gap: 8px;
}

.uibf-logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--uibf-accent), var(--uibf-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: var(--uibf-bg);
}

.uibf-site-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--uibf-accent);
  letter-spacing: 0.5px;
}

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

.uibf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 6px 14px;
  border-radius: var(--uibf-radius);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--uibf-transition);
}

.uibf-btn-register {
  background: var(--uibf-accent);
  color: var(--uibf-bg);
}

.uibf-btn-register:hover {
  background: var(--uibf-accent-hover);
  transform: translateY(-1px);
}

.uibf-btn-login {
  background: transparent;
  color: var(--uibf-accent);
  border: 1.5px solid var(--uibf-accent);
}

.uibf-btn-login:hover {
  background: rgba(64, 224, 208, 0.1);
}

.uibf-hamburger {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: transparent;
  border: none;
  color: var(--uibf-text);
  font-size: 22px;
  cursor: pointer;
}

/* === Mobile Menu === */
.uibf-mobile-menu {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--uibf-max-width);
  height: 100vh;
  background: var(--uibf-bg);
  z-index: 9999;
  overflow-y: auto;
  transform: translateX(-50%) translateX(100%);
  transition: transform 0.35s ease;
}

.uibf-mobile-menu.uibf-menu-active {
  transform: translateX(-50%) translateX(0);
}

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

.uibf-mobile-menu.uibf-menu-active + .uibf-menu-overlay,
.uibf-menu-active ~ .uibf-menu-overlay {
  display: block;
}

.uibf-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--uibf-border);
}

.uibf-menu-close {
  width: 36px;
  height: 36px;
  background: transparent;
  border: none;
  color: var(--uibf-text);
  font-size: 24px;
  cursor: pointer;
}

.uibf-menu-links {
  padding: 16px;
}

.uibf-menu-link {
  display: block;
  padding: 12px 16px;
  color: var(--uibf-text);
  font-size: 15px;
  border-radius: var(--uibf-radius);
  transition: background var(--uibf-transition);
  margin-bottom: 4px;
}

.uibf-menu-link:hover {
  background: var(--uibf-bg-light);
  color: var(--uibf-accent);
}

/* === Main Content === */
.uibf-main {
  padding-top: var(--uibf-header-h);
  min-height: 100vh;
}

/* === Carousel === */
.uibf-carousel {
  position: relative;
  width: 100%;
  overflow: hidden;
  margin-bottom: 20px;
}

.uibf-carousel-track {
  position: relative;
  width: 100%;
  touch-action: pan-y;
}

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

.uibf-carousel-slide.uibf-slide-active {
  display: block;
}

.uibf-carousel-slide img {
  width: 100%;
  height: auto;
  aspect-ratio: 430/200;
  object-fit: cover;
}

.uibf-carousel-dots {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
}

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

.uibf-carousel-dot.uibf-dot-active {
  background: var(--uibf-accent);
  width: 20px;
  border-radius: 4px;
}

/* === Content Sections === */
.uibf-section {
  padding: 16px;
  margin-bottom: 12px;
}

.uibf-section-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--uibf-accent);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--uibf-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.uibf-section-title .material-icons {
  font-size: 20px;
}

/* === Game Grid === */
.uibf-game-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.uibf-game-card {
  background: var(--uibf-bg-card);
  border-radius: var(--uibf-radius);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--uibf-transition), box-shadow var(--uibf-transition);
  border: 1px solid var(--uibf-border);
}

.uibf-game-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 16px var(--uibf-shadow);
  border-color: var(--uibf-accent);
}

.uibf-game-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

.uibf-game-name {
  padding: 4px 6px;
  font-size: 11px;
  font-weight: 500;
  color: var(--uibf-text-muted);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* === Content Block === */
.uibf-content-block {
  background: var(--uibf-bg-card);
  border-radius: var(--uibf-radius-lg);
  padding: 20px;
  margin-bottom: 16px;
  border: 1px solid var(--uibf-border);
}

.uibf-content-block h2 {
  font-size: 17px;
  font-weight: 700;
  color: var(--uibf-accent);
  margin-bottom: 12px;
}

.uibf-content-block h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--uibf-text);
  margin-bottom: 8px;
}

.uibf-content-block p {
  font-size: 14px;
  color: var(--uibf-text-muted);
  line-height: 1.7;
  margin-bottom: 10px;
}

.uibf-content-block ul {
  padding-left: 18px;
  margin-bottom: 10px;
}

.uibf-content-block li {
  font-size: 14px;
  color: var(--uibf-text-muted);
  margin-bottom: 6px;
  line-height: 1.5;
}

/* === Feature Grid === */
.uibf-feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.uibf-feature-item {
  background: var(--uibf-bg-light);
  border-radius: var(--uibf-radius);
  padding: 16px;
  text-align: center;
  border: 1px solid var(--uibf-border);
  transition: border-color var(--uibf-transition);
}

.uibf-feature-item:hover {
  border-color: var(--uibf-accent);
}

.uibf-feature-icon {
  font-size: 28px;
  color: var(--uibf-accent);
  margin-bottom: 8px;
}

.uibf-feature-item h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--uibf-text);
  margin-bottom: 4px;
}

.uibf-feature-item p {
  font-size: 12px;
  color: var(--uibf-text-dim);
  line-height: 1.4;
}

/* === CTA Block === */
.uibf-cta {
  background: linear-gradient(135deg, var(--uibf-secondary), var(--uibf-bg-light));
  border-radius: var(--uibf-radius-lg);
  padding: 24px 20px;
  text-align: center;
  margin-bottom: 16px;
  border: 1px solid var(--uibf-secondary);
}

.uibf-cta h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--uibf-accent);
  margin-bottom: 10px;
}

.uibf-cta p {
  font-size: 14px;
  color: var(--uibf-text-muted);
  margin-bottom: 16px;
}

.uibf-cta .uibf-btn {
  padding: 10px 28px;
  font-size: 15px;
}

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

.uibf-faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  color: var(--uibf-text);
  transition: background var(--uibf-transition);
}

.uibf-faq-question:hover {
  background: var(--uibf-bg-light);
}

.uibf-faq-question .uibf-faq-icon {
  color: var(--uibf-accent);
  font-size: 18px;
  transition: transform var(--uibf-transition);
}

.uibf-faq-item.open .uibf-faq-question .uibf-faq-icon {
  transform: rotate(180deg);
}

.uibf-faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.uibf-faq-item.open .uibf-faq-answer {
  max-height: 500px;
}

.uibf-faq-answer-inner {
  padding: 0 16px 14px;
  font-size: 13px;
  color: var(--uibf-text-muted);
  line-height: 1.7;
}

/* === Footer === */
.uibf-footer {
  background: var(--uibf-bg-light);
  padding: 24px 16px;
  border-top: 1px solid var(--uibf-border);
  margin-top: 20px;
}

.uibf-footer-brand {
  text-align: center;
  margin-bottom: 16px;
}

.uibf-footer-brand p {
  font-size: 13px;
  color: var(--uibf-text-dim);
  line-height: 1.6;
}

.uibf-footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 16px;
}

.uibf-footer-links a {
  font-size: 12px;
  color: var(--uibf-text-muted);
}

.uibf-footer-links a:hover {
  color: var(--uibf-accent);
}

.uibf-footer-copy {
  text-align: center;
  font-size: 11px;
  color: var(--uibf-text-dim);
  padding-top: 12px;
  border-top: 1px solid var(--uibf-border);
}

/* === Bottom Navigation === */
.uibf-bnav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--uibf-max-width);
  height: var(--uibf-bnav-h);
  background: var(--uibf-bg-light);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 1000;
  border-top: 1px solid var(--uibf-border);
  box-shadow: 0 -2px 12px var(--uibf-shadow);
}

.uibf-bnav-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 60px;
  min-height: 52px;
  background: transparent;
  border: none;
  color: var(--uibf-text-dim);
  cursor: pointer;
  transition: all var(--uibf-transition);
  text-decoration: none;
  padding: 4px 0;
}

.uibf-bnav-btn:hover,
.uibf-bnav-btn.uibf-bnav-active {
  color: var(--uibf-accent);
}

.uibf-bnav-btn .uibf-bnav-icon {
  font-size: 22px;
  margin-bottom: 2px;
}

.uibf-bnav-btn .uibf-bnav-label {
  font-size: 10px;
  font-weight: 500;
}

.uibf-bnav-active .uibf-bnav-icon {
  transform: scale(1.1);
}

/* === Promo Button Style === */
.uibf-promo-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: linear-gradient(135deg, var(--uibf-accent), var(--uibf-secondary-light));
  color: var(--uibf-bg);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--uibf-radius);
  cursor: pointer;
  border: none;
  transition: all var(--uibf-transition);
}

.uibf-promo-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(64, 224, 208, 0.3);
}

/* === Responsive === */
@media (min-width: 769px) {
  .uibf-bnav {
    display: none;
  }
  .uibf-hamburger {
    display: none;
  }
}

@media (max-width: 768px) {
  .uibf-main {
    padding-bottom: calc(var(--uibf-bnav-h) + 20px);
  }
}

/* === Utility === */
.uibf-text-center { text-align: center; }
.uibf-mt-8 { margin-top: 8px; }
.uibf-mt-16 { margin-top: 16px; }
.uibf-mb-8 { margin-bottom: 8px; }
.uibf-mb-16 { margin-bottom: 16px; }