/* ============================================================
 * yy777 app download - layout.css
 * Mobile-first styling for yy777appdownload.click
 * All custom classes use the "w54bc-" prefix.
 * Palette: #FFB74D | #FFA500 | #808080 | #141414 | #DCDCDC
 * Root font-size: 62.5% (1rem = 10px).
 * ============================================================ */

:root {
  --w54bc-primary: #FFB74D;
  --w54bc-accent: #FFA500;
  --w54bc-muted: #808080;
  --w54bc-bg: #141414;
  --w54bc-bg-soft: #1c1c1c;
  --w54bc-card: #232323;
  --w54bc-text: #DCDCDC;
  --w54bc-text-dim: #b0b0b0;
  --w54bc-white: #ffffff;
  --w54bc-border: rgba(255, 183, 77, 0.18);
  --w54bc-shadow: 0 4px 18px rgba(0, 0, 0, 0.45);
  --w54bc-radius: 1.4rem;
  --w54bc-radius-sm: 1rem;
  --w54bc-transition: 0.25s ease;
}

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

html {
  font-size: 62.5%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "Segoe UI", "Helvetica Neue", Roboto, system-ui, -apple-system, sans-serif;
  background: var(--w54bc-bg);
  color: var(--w54bc-text);
  line-height: 1.5;
  font-size: 1.5rem;
  min-height: 100vh;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: var(--w54bc-primary); text-decoration: none; transition: color var(--w54bc-transition); }
a:hover, a:focus { color: var(--w54bc-accent); }
ul, ol { list-style: none; }

.w54bc-container {
  width: 100%;
  max-width: 430px;
  margin: 0 auto;
  padding: 0 1.2rem;
}
.w54bc-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ============================================================
 * Header / Top navigation
 * ========================================================= */
.w54bc-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: linear-gradient(180deg, rgba(20, 20, 20, 0.96), rgba(20, 20, 20, 0.88));
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--w54bc-border);
}
.w54bc-header-inner {
  max-width: 430px;
  margin: 0 auto;
  padding: 0.8rem 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}
.w54bc-brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
}
.w54bc-brand img {
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 0.6rem;
  flex-shrink: 0;
}
.w54bc-brand-name {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--w54bc-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0.2px;
}
.w54bc-brand-name span { color: var(--w54bc-text); }

.w54bc-header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.w54bc-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: none;
  border-radius: 0.9rem;
  padding: 0.7rem 1.2rem;
  font-size: 1.3rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--w54bc-transition), box-shadow var(--w54bc-transition), background var(--w54bc-transition);
  min-height: 3.6rem;
  text-decoration: none;
  line-height: 1;
}
.w54bc-btn:focus { outline: 2px solid rgba(255, 183, 77, 0.6); outline-offset: 2px; }
.w54bc-btn-primary {
  background: linear-gradient(135deg, var(--w54bc-primary), var(--w54bc-accent));
  color: #141414;
  box-shadow: 0 3px 10px rgba(255, 165, 0, 0.35);
}
.w54bc-btn-primary:hover { transform: translateY(-1px); color: #141414; }
.w54bc-btn-ghost {
  background: transparent;
  border: 1.5px solid var(--w54bc-primary);
  color: var(--w54bc-primary);
}
.w54bc-btn-ghost:hover { background: rgba(255, 183, 77, 0.12); color: var(--w54bc-primary); }
.w54bc-btn-block { width: 100%; }
.w54bc-btn-lg { padding: 1.1rem 1.5rem; font-size: 1.5rem; min-height: 4.6rem; }

.w54bc-icon-btn {
  width: 3.6rem;
  height: 3.6rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 183, 77, 0.12);
  color: var(--w54bc-primary);
  border-radius: 0.8rem;
  border: 1px solid var(--w54bc-border);
  cursor: pointer;
  font-size: 1.8rem;
  transition: background var(--w54bc-transition);
}
.w54bc-icon-btn:hover { background: rgba(255, 183, 77, 0.22); }

/* ============================================================
 * Mobile drawer menu
 * ========================================================= */
.w54bc-menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 9998;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--w54bc-transition);
}
.w54bc-overlay-show { opacity: 1; visibility: visible; }

.w54bc-mobile-menu {
  position: fixed;
  top: 0; right: -85%;
  width: 78%;
  max-width: 320px;
  height: 100vh;
  background: var(--w54bc-bg-soft);
  z-index: 9999;
  padding: 7rem 1.5rem 2rem;
  overflow-y: auto;
  transition: right 0.3s ease;
  border-left: 1px solid var(--w54bc-border);
}
.w54bc-menu-open { right: 0; }
.w54bc-mobile-menu h4 {
  font-size: 1.3rem;
  color: var(--w54bc-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 1.5rem 0 0.8rem;
}
.w54bc-mobile-menu a {
  display: block;
  padding: 1rem 0.8rem;
  font-size: 1.4rem;
  color: var(--w54bc-text);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.w54bc-mobile-menu a:hover { background: rgba(255, 183, 77, 0.08); color: var(--w54bc-primary); }
.w54bc-menu-close {
  position: absolute;
  top: 1.2rem; right: 1.2rem;
  background: transparent;
  border: none;
  color: var(--w54bc-text);
  font-size: 2.2rem;
  cursor: pointer;
}

/* ============================================================
 * Main content
 * ========================================================= */
.w54bc-main {
  flex: 1;
  padding-top: 6.5rem;
}
.w54bc-section {
  padding: 2.5rem 0;
}
.w54bc-section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.w54bc-section-title {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--w54bc-white);
  position: relative;
  padding-left: 1.2rem;
}
.w54bc-section-title::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 80%;
  background: linear-gradient(180deg, var(--w54bc-primary), var(--w54bc-accent));
  border-radius: 2px;
}
.w54bc-section-sub {
  color: var(--w54bc-muted);
  font-size: 1.3rem;
  font-weight: 500;
}
.w54bc-card {
  background: var(--w54bc-card);
  border: 1px solid var(--w54bc-border);
  border-radius: var(--w54bc-radius-sm);
  padding: 1.5rem;
  margin-bottom: 1.2rem;
  box-shadow: var(--w54bc-shadow);
}
.w54bc-card h3 {
  font-size: 1.6rem;
  color: var(--w54bc-primary);
  margin-bottom: 0.6rem;
}
.w54bc-card p {
  color: var(--w54bc-text-dim);
  font-size: 1.35rem;
  line-height: 1.55;
}

/* ============================================================
 * Hero carousel
 * ========================================================= */
.w54bc-carousel {
  position: relative;
  border-radius: var(--w54bc-radius);
  overflow: hidden;
  margin: 1rem 0 0.5rem;
  box-shadow: var(--w54bc-shadow);
  aspect-ratio: 16 / 9;
}
.w54bc-slides { position: relative; width: 100%; height: 100%; }
.w54bc-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.6s ease;
  cursor: pointer;
}
.w54bc-slide img { width: 100%; height: 100%; object-fit: cover; }
.w54bc-slide-active { opacity: 1; }
.w54bc-slide-cap {
  position: absolute;
  left: 1.2rem; bottom: 1.2rem;
  background: linear-gradient(90deg, rgba(20,20,20,0.85), rgba(20,20,20,0.4));
  padding: 0.7rem 1.2rem;
  border-radius: 1rem;
  color: var(--w54bc-white);
  font-size: 1.35rem;
  font-weight: 600;
  max-width: 80%;
}
.w54bc-carousel-dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: rgba(220, 220, 220, 0.4);
  margin: 0 3px;
  cursor: pointer;
  transition: background var(--w54bc-transition), transform var(--w54bc-transition);
}
.w54bc-dot-active { background: var(--w54bc-primary); transform: scale(1.3); }
.w54bc-carousel-dots {
  position: absolute;
  bottom: 0.8rem; right: 1rem;
  z-index: 2;
}

/* ============================================================
 * Game grid
 * ========================================================= */
.w54bc-cat-section { margin-bottom: 2.5rem; }
.w54bc-cat-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, rgba(255, 183, 77, 0.18), rgba(255, 165, 0, 0.1));
  border: 1px solid var(--w54bc-border);
  padding: 0.5rem 1rem;
  border-radius: 2rem;
  font-size: 1.25rem;
  color: var(--w54bc-primary);
  font-weight: 600;
  margin-bottom: 1rem;
}
.w54bc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
}
.w54bc-game {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  cursor: pointer;
  transition: transform var(--w54bc-transition);
  background: transparent;
  border: none;
}
.w54bc-game:hover { transform: translateY(-2px); }
.w54bc-game-img-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 0.9rem;
  overflow: hidden;
  border: 1px solid rgba(255, 183, 77, 0.2);
  background: linear-gradient(160deg, #2a2a2a, #181818);
}
.w54bc-game-img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.w54bc-game:hover .w54bc-game-img-wrap img { transform: scale(1.06); }
.w54bc-game-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(20, 20, 20, 0.55);
  color: var(--w54bc-primary);
  font-size: 2rem;
  opacity: 0;
  transition: opacity var(--w54bc-transition);
}
.w54bc-game:hover .w54bc-game-play { opacity: 1; }
.w54bc-game-name {
  margin-top: 0.5rem;
  font-size: 1.15rem;
  color: var(--w54bc-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
  font-weight: 500;
}

/* ============================================================
 * Info / feature / faq blocks
 * ========================================================= */
.w54bc-info-list { display: grid; gap: 1rem; }
.w54bc-info-row {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem;
  background: rgba(255, 183, 77, 0.06);
  border-left: 3px solid var(--w54bc-primary);
  border-radius: 0.6rem;
}
.w54bc-info-row .w54bc-info-ic {
  flex-shrink: 0;
  width: 3.2rem; height: 3.2rem;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255, 183, 77, 0.15);
  border-radius: 0.6rem;
  color: var(--w54bc-primary);
  font-size: 1.6rem;
}
.w54bc-info-row strong { color: var(--w54bc-white); display: block; font-size: 1.4rem; margin-bottom: 0.2rem; }
.w54bc-info-row span { color: var(--w54bc-text-dim); font-size: 1.3rem; }

.w54bc-step {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  align-items: flex-start;
}
.w54bc-step-num {
  flex-shrink: 0;
  width: 3rem; height: 3rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--w54bc-primary), var(--w54bc-accent));
  color: #141414;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800;
  font-size: 1.5rem;
}
.w54bc-step strong { color: var(--w54bc-white); font-size: 1.45rem; display: block; margin-bottom: 0.2rem; }
.w54bc-step p { color: var(--w54bc-text-dim); font-size: 1.3rem; }

.w54bc-faq-item {
  background: var(--w54bc-card);
  border: 1px solid var(--w54bc-border);
  border-radius: 0.8rem;
  margin-bottom: 0.8rem;
  overflow: hidden;
}
.w54bc-faq-q {
  display: block;
  width: 100%;
  text-align: left;
  padding: 1.1rem 1.3rem;
  background: transparent;
  border: none;
  color: var(--w54bc-white);
  font-size: 1.4rem;
  font-weight: 600;
  cursor: pointer;
}
.w54bc-faq-a {
  padding: 0 1.3rem 1.2rem;
  color: var(--w54bc-text-dim);
  font-size: 1.3rem;
  line-height: 1.55;
}

.w54bc-promo-banner {
  background: linear-gradient(135deg, rgba(255, 183, 77, 0.18), rgba(255, 165, 0, 0.08));
  border: 1px solid var(--w54bc-border);
  border-radius: var(--w54bc-radius-sm);
  padding: 1.5rem;
  text-align: center;
  margin: 1.5rem 0;
}
.w54bc-promo-banner h3 {
  font-size: 1.7rem;
  color: var(--w54bc-primary);
  margin-bottom: 0.4rem;
}
.w54bc-promo-banner p {
  color: var(--w54bc-text-dim);
  font-size: 1.3rem;
  margin-bottom: 1rem;
}

.w54bc-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.8rem;
  margin: 1rem 0;
}
.w54bc-stat {
  background: var(--w54bc-card);
  border: 1px solid var(--w54bc-border);
  border-radius: 0.8rem;
  padding: 1rem;
  text-align: center;
}
.w54bc-stat .num {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--w54bc-primary);
  display: block;
}
.w54bc-stat .lbl { color: var(--w54bc-text-dim); font-size: 1.15rem; }

.w54bc-inline-link {
  color: var(--w54bc-primary);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ============================================================
 * Footer
 * ========================================================= */
.w54bc-footer {
  background: #0e0e0e;
  border-top: 1px solid var(--w54bc-border);
  padding: 2.5rem 0 8rem;
  margin-top: 2rem;
}
.w54bc-footer-desc {
  color: var(--w54bc-text-dim);
  font-size: 1.3rem;
  line-height: 1.55;
  margin-bottom: 1.5rem;
}
.w54bc-footer h4 {
  color: var(--w54bc-primary);
  font-size: 1.45rem;
  margin: 1.5rem 0 0.8rem;
}
.w54bc-footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem 1rem;
  margin-bottom: 1.5rem;
}
.w54bc-footer-links a {
  color: var(--w54bc-text-dim);
  font-size: 1.25rem;
}
.w54bc-footer-links a:hover { color: var(--w54bc-primary); }
.w54bc-footer-promos {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.7rem;
  margin: 1rem 0;
}
.w54bc-footer-promos .w54bc-btn { font-size: 1.2rem; padding: 0.8rem; }
.w54bc-footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1.5rem;
  text-align: center;
  color: var(--w54bc-muted);
  font-size: 1.2rem;
}

/* ============================================================
 * Mobile bottom navigation
 * ========================================================= */
.w54bc-bottom-nav {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 1000;
  background: linear-gradient(180deg, #1a1a1a, #0c0c0c);
  border-top: 1px solid var(--w54bc-border);
  box-shadow: 0 -4px 18px rgba(0, 0, 0, 0.55);
  display: flex;
  justify-content: space-around;
  align-items: stretch;
  height: 6rem;
  padding: 0.3rem 0;
}
.w54bc-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  background: transparent;
  border: none;
  color: var(--w54bc-muted);
  font-size: 1rem;
  cursor: pointer;
  text-decoration: none;
  padding: 0.2rem;
  min-width: 5.6rem;
  min-height: 5.6rem;
  transition: color var(--w54bc-transition), transform var(--w54bc-transition);
  position: relative;
}
.w54bc-nav-item .ic { font-size: 2.2rem; line-height: 1; }
.w54bc-nav-item .lbl { font-size: 1rem; font-weight: 500; }
.w54bc-nav-item:hover { color: var(--w54bc-primary); transform: translateY(-1px); }
.w54bc-nav-item.active { color: var(--w54bc-primary); }
.w54bc-nav-item.active::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 2.6rem; height: 3px;
  border-radius: 0 0 3px 3px;
  background: linear-gradient(90deg, var(--w54bc-primary), var(--w54bc-accent));
}
.w54bc-nav-item.promo {
  color: var(--w54bc-primary);
}
.w54bc-nav-badge {
  position: absolute;
  top: 0.4rem; right: 1.4rem;
  background: #ff4d4d;
  color: #fff;
  border-radius: 1rem;
  font-size: 0.85rem;
  padding: 0 0.4rem;
  min-width: 1.4rem;
  height: 1.4rem;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
}

/* ============================================================
 * Desktop rules
 * ========================================================= */
@media (min-width: 769px) {
  .w54bc-bottom-nav { display: none; }
  .w54bc-container { max-width: 760px; }
  .w54bc-header-inner { max-width: 760px; }
  .w54bc-grid { grid-template-columns: repeat(6, 1fr); }
  .w54bc-footer-promos { grid-template-columns: repeat(4, 1fr); }
  .w54bc-footer-links { grid-template-columns: repeat(3, 1fr); }
}

/* ============================================================
 * Mobile padding clearance
 * ========================================================= */
@media (max-width: 768px) {
  .w54bc-main { padding-bottom: 8rem; }
  body { padding-bottom: 0; }
}

/* ============================================================
 * Utility
 * ========================================================= */
.w54bc-text-center { text-align: center; }
.w54bc-mt-1 { margin-top: 0.5rem; }
.w54bc-mt-2 { margin-top: 1rem; }
.w54bc-hidden { display: none !important; }
.w54bc-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--w54bc-border), transparent);
  margin: 1.5rem 0;
}