.app-header {
    width: 100%;
    background: #151515;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding-top: calc(0.8rem + env(safe-area-inset-top)); 
    padding-bottom: 0.8rem;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
    z-index: 100;
    position: relative;
}

.header-inner {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.app-header h1 {
    margin: 0;
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.95);
    letter-spacing: 2px;
    font-weight: 600;
    text-transform: uppercase;
}

.debug-menu-btn {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 30px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 200;
}

.debug-menu-btn span {
    position: absolute;
    left: 5px; 
    width: 20px;
    height: 2px;
    background-color: white;
    border-radius: 2px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.debug-menu-btn span:nth-child(1) { top: 4px; }
.debug-menu-btn span:nth-child(2) { top: 11px; }
.debug-menu-btn span:nth-child(3) { top: 18px; }

.debug-menu-btn.open span:nth-child(1) {
    top: 11px;
    transform: rotate(45deg);
}

.debug-menu-btn.open span:nth-child(2) {
    opacity: 0;
    transform: scale(0.1);
}

.debug-menu-btn.open span:nth-child(3) {
    top: 11px;
    transform: rotate(-45deg);
}

.debug-menu-btn:active {
    transform: translateY(-50%) scale(0.9);
}

.debug-menu {
    position: absolute;
    top: calc(100% + 15px);
    right: 25px;
    left: auto;
    width: 220px;
    z-index: 9999;
    padding: 8px;
    border-radius: 12px;
    background: rgba(25, 25, 25, 0.95);
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 10px 40px rgba(0,0,0,0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    display: grid;
    gap: 6px;
    opacity: 0;
    transform: translateY(-10px) scale(0.95);
    transform-origin: top right;
    pointer-events: none;
    transition: opacity 200ms ease, transform 200ms cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.debug-menu.open {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.debug-menu-title {
    font-size: 0.75rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: rgba(255,255,255,0.5);
    padding: 6px 8px 4px 8px;
}

.debug-menu-item {
    width: 100%;
    padding: 12px 14px;
    border-radius: 8px;
    border: none;
    background: transparent;
    color: rgba(255,255,255,0.9);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    transition: background 160ms ease;
}

.debug-menu-item:hover {
    background: rgba(255,255,255,0.08);
}

/* Mobile */
@media (max-width: 768px) {
    .debug-menu-btn {
        right: 15px;
    }

    .debug-menu {
        right: 15px;
        left: 15px;
        width: auto;
        max-width: none;
        transform-origin: top right;
    }

    .debug-menu.open {
        transform: translateY(0) scale(1);
    }
    
    .debug-menu-item {
        padding: 16px;
        font-size: 1rem;
    }
}