/* ============================================================
   Dark Grid Arcade – Layout: Topbar
   Classic top navigation bar layout.
   ============================================================ */

.layout-topbar .site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background: var(--bg-header);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    height: var(--header-height);
    display: flex;
    align-items: center;
}

.layout-topbar .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    gap: var(--space-lg);
}

.layout-topbar .site-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-weight: 800;
    font-size: var(--text-xl);
    color: var(--text-primary);
    text-decoration: none;
    flex-shrink: 0;
}
.layout-topbar .site-logo img { height: 36px; width: auto; }
.layout-topbar .site-logo span {
    background: linear-gradient(135deg, #00d9ff, #9333ea);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 8px rgba(0, 217, 255, 0.3));
}

/* Header Search */
.layout-topbar .header-search {
    flex: 1;
    max-width: 500px;
    position: relative;
}

.layout-topbar .header-search input {
    width: 100%;
    padding: 10px 16px 10px 42px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: var(--text-sm);
    transition: all var(--transition-normal);
    outline: none;
}

.layout-topbar .header-search input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.2);
}

.layout-topbar .header-search input::placeholder { color: var(--text-muted); }

.layout-topbar .header-search .search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

/* Header Nav */
.layout-topbar .header-nav {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.layout-topbar .header-nav a,
.layout-topbar .header-nav button {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 8px 14px;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    border: none;
    background: none;
    cursor: pointer;
    white-space: nowrap;
}

.layout-topbar .header-nav a:hover,
.layout-topbar .header-nav button:hover {
    color: var(--text-primary);
    background: var(--bg-card);
}

/* Header User Area */
.layout-topbar .header-user {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.layout-topbar .header-avatar {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-primary);
    font-size: var(--text-sm);
    font-weight: 500;
}

.layout-topbar .header-avatar img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-color);
    flex-shrink: 0;
}

.layout-topbar .xp-badge {
    padding: 2px 8px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 700;
    color: white;
}

.layout-topbar .notification-bell {
    position: relative;
}

.layout-topbar .notif-count {
    position: absolute;
    top: 2px;
    right: 2px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-danger);
    color: white;
    font-size: 0.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

/* Mobile Menu Toggle */
.layout-topbar .menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--space-sm);
}

/* Content: Centered with max-width */
.layout-topbar .main-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .layout-topbar .header-search { display: none; }
    .layout-topbar .header-nav { display: none; }
    .layout-topbar .menu-toggle { display: block; }

    .layout-topbar .header-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--bg-header);
        border-bottom: 1px solid var(--border-color);
        padding: var(--space-md);
        backdrop-filter: blur(16px);
        z-index: var(--z-header);
    }
}