/**
 * tk66.sbs - Layout Stylesheet
 * Bengali (bn-BD) gaming platform
 * Prefix: uibd-
 */

/* === CSS Variables === */
:root {
    --uibd-brown: #A0522D;
    --uibd-silver: #C0C0C0;
    --uibd-gray: #6C757D;
    --uibd-tan: #DEB887;
    --uibd-khaki: #8B7355;
    --uibd-dark: #0D1117;
    --uibd-bg: #0D1117;
    --uibd-card-bg: #161B22;
    --uibd-card-border: #21262D;
    --uibd-text: #DEB887;
    --uibd-text-light: #C0C0C0;
    --uibd-text-dim: #6C757D;
    --uibd-accent: #A0522D;
    --uibd-accent-light: #C46B3A;
    --uibd-gold: #DEB887;
    --uibd-radius: 10px;
    --uibd-radius-sm: 6px;
    --uibd-font: 'Hind Siliguri', sans-serif;
    --uibd-max-w: 430px;
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--uibd-font);
    background: var(--uibd-bg);
    color: var(--uibd-text);
    line-height: 1.6;
    max-width: var(--uibd-max-w);
    margin: 0 auto;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--uibd-tan); text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

/* === Header === */
.uibd-header {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: var(--uibd-max-w);
    z-index: 1000;
    background: linear-gradient(180deg, #161B22 0%, #0D1117 100%);
    border-bottom: 1px solid var(--uibd-card-border);
    padding: 10px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    backdrop-filter: blur(10px);
}
.uibd-logo-area {
    display: flex;
    align-items: center;
    gap: 8px;
}
.uibd-logo-area img {
    width: 36px;
    height: 36px;
    border-radius: 8px;
}
.uibd-logo-text {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--uibd-gold);
    letter-spacing: 1px;
}
.uibd-header-btns {
    display: flex;
    gap: 8px;
    align-items: center;
}
.uibd-btn-login {
    padding: 6px 14px;
    border-radius: var(--uibd-radius-sm);
    background: transparent;
    border: 1.5px solid var(--uibd-accent);
    color: var(--uibd-tan);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--uibd-font);
    transition: all 0.2s;
}
.uibd-btn-login:hover { background: var(--uibd-accent); color: #fff; }
.uibd-btn-register {
    padding: 6px 14px;
    border-radius: var(--uibd-radius-sm);
    background: linear-gradient(135deg, var(--uibd-accent), var(--uibd-accent-light));
    border: none;
    color: #fff;
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    font-family: var(--uibd-font);
    transition: transform 0.2s;
}
.uibd-btn-register:hover { transform: scale(1.05); }
.uibd-menu-btn {
    background: none;
    border: none;
    color: var(--uibd-silver);
    font-size: 1.3rem;
    cursor: pointer;
    padding: 4px;
    margin-left: 6px;
}

/* === Mobile Menu === */
#uibd-mobile-menu {
    position: fixed;
    top: 0;
    right: -280px;
    width: 280px;
    height: 100vh;
    z-index: 9999;
    background: var(--uibd-card-bg);
    transition: right 0.3s ease;
    overflow-y: auto;
    padding: 20px 0;
}
#uibd-mobile-menu.uibd-menu-active { right: 0; }
#uibd-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 9998;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}
#uibd-menu-overlay.uibd-overlay-active { opacity: 1; pointer-events: all; }
.uibd-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 18px 16px;
    border-bottom: 1px solid var(--uibd-card-border);
}
.uibd-menu-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--uibd-gold);
}
.uibd-menu-close {
    background: none;
    border: none;
    color: var(--uibd-silver);
    font-size: 1.5rem;
    cursor: pointer;
}
.uibd-menu-list {
    list-style: none;
    padding: 10px 0;
}
.uibd-menu-list li a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--uibd-text-light);
    font-size: 0.95rem;
    transition: background 0.2s;
}
.uibd-menu-list li a:hover {
    background: rgba(160, 82, 45, 0.15);
    color: var(--uibd-gold);
}
.uibd-menu-list li a .material-icons,
.uibd-menu-list li a .fas,
.uibd-menu-list li a .bi {
    font-size: 20px;
    width: 24px;
    text-align: center;
}

/* === Main Content === */
.uibd-main {
    padding-top: 60px;
    padding-bottom: 20px;
}

/* === Carousel === */
.uibd-carousel {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: 0 0 var(--uibd-radius) var(--uibd-radius);
}
.uibd-carousel-track {
    position: relative;
    width: 100%;
    aspect-ratio: 16/8;
}
.uibd-carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.6s ease;
}
.uibd-carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.uibd-slide-active { opacity: 1; }
.uibd-carousel-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.45);
    color: #fff;
    border: none;
    padding: 10px 6px;
    cursor: pointer;
    font-size: 1rem;
    z-index: 5;
}
.uibd-carousel-prev { left: 6px; border-radius: 4px; }
.uibd-carousel-next { right: 6px; border-radius: 4px; }
.uibd-carousel-dots {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 6px;
}
.uibd-carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.35);
    cursor: pointer;
    transition: background 0.3s;
}
.uibd-dot-active { background: var(--uibd-gold); }

/* === Category Tabs === */
.uibd-cat-tabs {
    display: flex;
    overflow-x: auto;
    gap: 6px;
    padding: 14px 12px 8px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.uibd-cat-tabs::-webkit-scrollbar { display: none; }
.uibd-cat-tab {
    flex-shrink: 0;
    padding: 7px 16px;
    border-radius: 20px;
    background: var(--uibd-card-bg);
    border: 1px solid var(--uibd-card-border);
    color: var(--uibd-text-dim);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--uibd-font);
    transition: all 0.25s;
    white-space: nowrap;
}
.uibd-tab-active {
    background: linear-gradient(135deg, var(--uibd-accent), var(--uibd-accent-light));
    color: #fff;
    border-color: var(--uibd-accent);
}

/* === Game Grid === */
.uibd-cat-section { display: none; padding: 4px 12px 10px; }
.uibd-cat-active { display: block; }
.uibd-game-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}
.uibd-game-item {
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s;
}
.uibd-game-item:hover { transform: scale(1.05); }
.uibd-game-icon {
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--uibd-radius-sm);
    object-fit: cover;
    border: 1.5px solid var(--uibd-card-border);
    transition: border-color 0.2s;
}
.uibd-game-item:hover .uibd-game-icon { border-color: var(--uibd-accent); }
.uibd-game-name {
    font-size: 0.7rem;
    color: var(--uibd-text-light);
    margin-top: 4px;
    line-height: 1.3;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* === Content Sections === */
.uibd-section {
    padding: 20px 14px;
}
.uibd-section-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--uibd-gold);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--uibd-accent);
    display: flex;
    align-items: center;
    gap: 8px;
}
.uibd-section-title .material-icons,
.uibd-section-title .fas {
    color: var(--uibd-accent);
    font-size: 22px;
}
.uibd-text-block {
    color: var(--uibd-text-light);
    font-size: 0.92rem;
    line-height: 1.75;
    margin-bottom: 10px;
}
.uibd-text-block strong {
    color: var(--uibd-gold);
}
.uibd-highlight-box {
    background: var(--uibd-card-bg);
    border: 1px solid var(--uibd-card-border);
    border-left: 3px solid var(--uibd-accent);
    border-radius: var(--uibd-radius-sm);
    padding: 14px 16px;
    margin: 12px 0;
}
.uibd-step-list {
    list-style: none;
    padding: 0;
    counter-reset: uibd-step;
}
.uibd-step-list li {
    counter-increment: uibd-step;
    padding: 10px 0 10px 42px;
    position: relative;
    color: var(--uibd-text-light);
    font-size: 0.9rem;
    border-bottom: 1px solid rgba(33,38,45,0.6);
}
.uibd-step-list li::before {
    content: counter(uibd-step);
    position: absolute;
    left: 0;
    top: 10px;
    width: 28px;
    height: 28px;
    background: var(--uibd-accent);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
}
.uibd-feature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}
.uibd-feature-card {
    background: var(--uibd-card-bg);
    border: 1px solid var(--uibd-card-border);
    border-radius: var(--uibd-radius);
    padding: 14px;
    text-align: center;
    transition: border-color 0.2s;
}
.uibd-feature-card:hover { border-color: var(--uibd-accent); }
.uibd-feature-card .material-icons,
.uibd-feature-card .fas {
    font-size: 28px;
    color: var(--uibd-accent);
    margin-bottom: 6px;
}
.uibd-feature-card h4 {
    color: var(--uibd-gold);
    font-size: 0.88rem;
    margin-bottom: 4px;
}
.uibd-feature-card p {
    color: var(--uibd-text-dim);
    font-size: 0.76rem;
    line-height: 1.4;
}

/* === CTA Banner === */
.uibd-cta-banner {
    background: linear-gradient(135deg, var(--uibd-accent) 0%, #C46B3A 100%);
    border-radius: var(--uibd-radius);
    padding: 22px 18px;
    text-align: center;
    margin: 16px 14px;
}
.uibd-cta-banner h3 {
    color: #fff;
    font-size: 1.15rem;
    margin-bottom: 6px;
}
.uibd-cta-banner p {
    color: rgba(255,255,255,0.85);
    font-size: 0.88rem;
    margin-bottom: 14px;
}
.uibd-cta-btn {
    display: inline-block;
    padding: 10px 32px;
    background: #fff;
    color: var(--uibd-accent);
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    font-family: var(--uibd-font);
    transition: transform 0.2s;
}
.uibd-cta-btn:hover { transform: scale(1.05); }

/* === FAQ === */
.uibd-faq-item {
    background: var(--uibd-card-bg);
    border: 1px solid var(--uibd-card-border);
    border-radius: var(--uibd-radius-sm);
    margin-bottom: 8px;
    overflow: hidden;
}
.uibd-faq-q {
    padding: 12px 14px;
    font-weight: 600;
    color: var(--uibd-gold);
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
}
.uibd-faq-a {
    padding: 0 14px 12px;
    color: var(--uibd-text-light);
    font-size: 0.85rem;
    line-height: 1.6;
}

/* === Footer === */
.uibd-footer {
    background: var(--uibd-card-bg);
    border-top: 1px solid var(--uibd-card-border);
    padding: 20px 14px 30px;
    text-align: center;
}
.uibd-partners {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 14px;
}
.uibd-partner-badge {
    padding: 4px 10px;
    background: rgba(160,82,45,0.15);
    border: 1px solid var(--uibd-card-border);
    border-radius: 4px;
    font-size: 0.72rem;
    color: var(--uibd-text-dim);
    font-weight: 600;
}
.uibd-footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px 14px;
    margin: 12px 0;
}
.uibd-footer-links a {
    color: var(--uibd-text-dim);
    font-size: 0.78rem;
    transition: color 0.2s;
}
.uibd-footer-links a:hover { color: var(--uibd-gold); }
.uibd-footer-copy {
    color: var(--uibd-text-dim);
    font-size: 0.72rem;
    margin-top: 10px;
}

/* === Bottom Nav === */
.uibd-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: var(--uibd-max-w);
    z-index: 1000;
    background: linear-gradient(180deg, #1A1F27 0%, #0D1117 100%);
    border-top: 1px solid var(--uibd-card-border);
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: 60px;
    padding: 0 4px;
}
.uibd-nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 60px;
    min-height: 54px;
    background: none;
    border: none;
    color: var(--uibd-text-dim);
    cursor: pointer;
    transition: color 0.2s;
    gap: 2px;
    text-decoration: none;
}
.uibd-nav-btn:hover { color: var(--uibd-gold); }
.uibd-nav-btn .material-icons,
.uibd-nav-btn .fas,
.uibd-nav-btn .far,
.uibd-nav-btn .bi,
.uibd-nav-btn ion-icon {
    font-size: 22px;
}
.uibd-nav-btn span {
    font-size: 0.65rem;
    font-family: var(--uibd-font);
}
.uibd-nav-active { color: var(--uibd-accent-light) !important; }

/* === Utility === */
.uibd-divider {
    height: 1px;
    background: var(--uibd-card-border);
    margin: 0 14px;
}
.uibd-mt-1 { margin-top: 8px; }
.uibd-mb-1 { margin-bottom: 8px; }
.uibd-mt-2 { margin-top: 16px; }
.uibd-text-center { text-align: center; }
.uibd-internal-links {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 10px 0;
}
.uibd-internal-links a {
    padding: 4px 10px;
    background: rgba(160,82,45,0.12);
    border-radius: 4px;
    font-size: 0.78rem;
    color: var(--uibd-tan);
    transition: background 0.2s;
}
.uibd-internal-links a:hover { background: rgba(160,82,45,0.25); }

/* === Responsive === */
@media (max-width: 768px) {
    .uibd-main { padding-bottom: 80px; }
}
@media (min-width: 769px) {
    .uibd-bottom-nav { display: none; }
}