:root {
    --bk-primary: #0066FF;
    --bk-primary-hover: #0052CC;
    --bk-accent: #00D2FF;
    --bk-dark-bg: #0A1128;
    --bk-dark-surface: #0F1B38;
    --bk-card-bg: #132247;
    --bk-card-border: rgba(255, 255, 255, 0.08);
    --bk-text-main: #FFFFFF;
    --bk-text-muted: #94A3B8;
    --bk-radius-sm: 8px;
    --bk-radius-md: 14px;
    --bk-radius-lg: 20px;
    --bk-shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
    --bk-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
    --bk-shadow-glow: 0 0 20px rgba(0, 102, 255, 0.35);
}

body {
    background-color: var(--bk-dark-bg);
    color: var(--bk-text-main);
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ==========================================================================
   Header & Navbar
   ========================================================================== */
.bk-navbar {
    background-color: rgba(10, 17, 40, 0.95);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--bk-card-border);
    transition: all 0.3s ease;
    z-index: 1030;
}

.bk-nav-logo {
    max-height: 42px;
    width: auto;
    object-fit: contain;
}

.bk-header-search-form {
    max-width: 460px;
    width: 100%;
}

.bk-header-search-group {
    background-color: var(--bk-dark-surface);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--bk-radius-md);
    overflow: hidden;
    width: 100%;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.bk-header-search-group:focus-within {
    border-color: var(--bk-primary);
    box-shadow: 0 0 12px rgba(0, 102, 255, 0.3);
}

.bk-header-search-input {
    background: transparent !important;
    border: none !important;
    color: #FFFFFF !important;
    font-size: 0.92rem;
    padding: 8px 12px;
}

.bk-header-search-input::placeholder {
    color: #64748B;
}

.bk-header-search-input:focus {
    box-shadow: none !important;
    outline: none !important;
}

.bk-header-search-btn {
    background: linear-gradient(135deg, var(--bk-primary), #0052CC);
    color: #FFFFFF !important;
    border: none;
    border-radius: 0 var(--bk-radius-md) var(--bk-radius-md) 0;
    font-weight: 700;
    font-size: 0.82rem;
    letter-spacing: 0.5px;
    padding: 8px 18px;
    transition: all 0.2s ease;
}

.bk-header-search-btn:hover {
    background: linear-gradient(135deg, #1A75FF, var(--bk-primary));
    box-shadow: var(--bk-shadow-glow);
}

.bk-nav-link {
    color: var(--bk-text-muted) !important;
    font-weight: 700;
    font-size: 0.88rem;
    letter-spacing: 0.5px;
    padding: 8px 16px !important;
    border-radius: var(--bk-radius-sm);
    transition: all 0.2s ease;
}

.bk-nav-link:hover, .bk-nav-link.active {
    color: #FFFFFF !important;
    background-color: rgba(255, 255, 255, 0.06);
}

/* ==========================================================================
   Filter Pills
   ========================================================================== */
.bk-filter-container {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 6px;
    scrollbar-width: thin;
}

.bk-filter-pill {
    white-space: nowrap;
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--bk-card-border);
    color: var(--bk-text-muted);
    padding: 8px 20px;
    border-radius: 30px;
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
}

.bk-filter-pill:hover {
    background-color: rgba(255, 255, 255, 0.08);
    color: #FFFFFF;
    border-color: rgba(255, 255, 255, 0.2);
}

.bk-filter-pill.active {
    background: linear-gradient(135deg, var(--bk-primary), #0052CC);
    color: #FFFFFF;
    border-color: transparent;
    box-shadow: 0 2px 10px rgba(0, 102, 255, 0.35);
}

/* ==========================================================================
   Poster Style Event Cards (Compact Layout)
   ========================================================================== */
.bk-poster-card {
    background-color: var(--bk-card-bg);
    border: 1px solid var(--bk-card-border);
    border-radius: var(--bk-radius-md);
    overflow: hidden;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    max-width: 270px;
    margin: 0 auto;
    width: 100%;
}

.bk-poster-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 24px rgba(0, 102, 255, 0.22);
    border-color: rgba(0, 210, 255, 0.4);
}

.bk-poster-header {
    background-color: rgba(10, 17, 40, 0.92);
    padding: 6px 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--bk-card-border);
}

.bk-poster-category {
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: 0.6px;
    color: var(--bk-accent);
}

.bk-poster-date-pill {
    font-size: 0.70rem;
    font-weight: 800;
    letter-spacing: 0.4px;
    color: #FFFFFF;
}

.bk-poster-image-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    background-color: #0F172A;
    overflow: hidden;
}

.bk-poster-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.4s ease;
}

.bk-poster-card:hover .bk-poster-img {
    transform: scale(1.04);
}

.bk-poster-body {
    padding: 12px;
    background-color: var(--bk-dark-surface);
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-grow: 1;
}

.bk-poster-title {
    font-size: 0.96rem;
    font-weight: 700;
    color: #FFFFFF;
    margin-bottom: 2px;
    line-height: 1.25;
}

.bk-poster-location {
    display: flex;
    align-items: flex-start;
    gap: 6px;
    font-size: 0.80rem;
}

.bk-poster-location svg {
    width: 14px;
    height: 14px;
}

/* ==========================================================================
   Detail View Components (Compact Contained Layout)
   ========================================================================== */
.bk-detail-container {
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
}

.bk-poster-detail-wrap {
    width: 100%;
    max-width: 280px;
    aspect-ratio: 1 / 1;
    border-radius: var(--bk-radius-md);
    overflow: hidden;
    border: 1px solid var(--bk-card-border);
    background-color: #0F172A;
    margin: 0 auto;
}

.bk-poster-detail-img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    object-position: center;
}

.bk-poster-detail-placeholder {
    width: 100%;
    height: 100%;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #132247, #0B132B);
}

.bk-surface-card {
    background-color: var(--bk-dark-surface);
    border: 1px solid var(--bk-card-border);
    border-radius: var(--bk-radius-md);
}

.bk-meta-panel {
    background-color: var(--bk-card-bg);
    border: 1px solid var(--bk-card-border);
}

.bk-icon-badge {
    width: 38px;
    height: 38px;
    border-radius: var(--bk-radius-sm);
    background-color: rgba(0, 102, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.bk-secondary-btn {
    background-color: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--bk-card-border);
    color: #FFFFFF !important;
    font-weight: 600;
    font-size: 0.88rem;
    padding: 10px 16px;
    border-radius: var(--bk-radius-sm);
    transition: all 0.2s ease;
}

.bk-secondary-btn:hover {
    background-color: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.25);
    color: #FFFFFF !important;
}

.bk-btn-buy {
    background-color: #1673FF !important;
    color: #FFFFFF !important;
    border: 1px solid #1673FF !important;
    border-radius: var(--bk-radius-sm) !important;
    font-weight: 700 !important;
    letter-spacing: 0.5px;
    padding: 12px 24px !important;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 14px rgba(22, 115, 255, 0.35);
    cursor: pointer;
}

.bk-btn-buy:hover,
.bk-btn-buy:focus {
    background-color: #0D5EDB !important;
    border-color: #0D5EDB !important;
    color: #FFFFFF !important;
    box-shadow: 0 6px 18px rgba(22, 115, 255, 0.5);
}

.bk-detail-info-text {
    color: #1673FF !important;
}

.bk-security-box {
    background-color: rgba(0, 102, 255, 0.08);
    border: 1px solid rgba(0, 102, 255, 0.2);
}

.bk-input {
    background-color: var(--bk-dark-bg) !important;
    border: 1px solid var(--bk-card-border) !important;
    color: #FFFFFF !important;
}

.bk-input:focus {
    border-color: var(--bk-primary) !important;
    box-shadow: 0 0 10px rgba(0, 102, 255, 0.3) !important;
}

/* ==========================================================================
   Empty States
   ========================================================================== */
.bk-empty-state {
    padding: 60px 20px;
    text-align: center;
    background-color: var(--bk-dark-surface);
    border: 1px dashed var(--bk-card-border);
    border-radius: var(--bk-radius-lg);
    margin: 30px 0;
}

.bk-empty-icon {
    font-size: 3.5rem;
    color: #475569;
    margin-bottom: 16px;
}

.bk-empty-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.bk-empty-desc {
    color: var(--bk-text-muted);
    max-width: 480px;
    margin: 0 auto 20px auto;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.bk-footer {
    margin-top: auto;
    background-color: var(--bk-dark-surface);
    border-top: 1px solid var(--bk-card-border);
    padding: 50px 0 25px 0;
}

.bk-footer-title {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: #FFFFFF;
}

.bk-footer-link {
    color: var(--bk-text-muted);
    text-decoration: none;
    font-size: 0.88rem;
    display: block;
    margin-bottom: 8px;
    transition: color 0.2s ease;
}

.bk-footer-link:hover {
    color: #FFFFFF;
}

.bk-footer-bottom {
    margin-top: 35px;
    padding-top: 20px;
    border-top: 1px solid var(--bk-card-border);
    color: #64748B;
    font-size: 0.82rem;
}

/* ==========================================================================
   Mobile Adjustments
   ========================================================================== */
@media (max-width: 991px) {
    .bk-header-search-form {
        max-width: 100%;
        margin-top: 12px;
        margin-bottom: 12px;
    }
}