/* ==========================================================================
   Burger Menu
   Fixed red circle top-left, overlay navigation.
   ========================================================================== */

.acc-burger-toggle {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 10000;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 51, 51, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.3s ease;
    box-shadow: 0 0 15px rgba(255, 51, 51, 0.4);
}

.acc-burger-toggle:hover {
    background: rgba(255, 51, 51, 1);
    transform: scale(1.05);
}

.acc-burger-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: #fff;
    border-radius: 1px;
    transition: all 0.3s ease;
}

/* Open state — X shape */
.acc-burger-toggle.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.acc-burger-toggle.is-open span:nth-child(2) {
    opacity: 0;
}

.acc-burger-toggle.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Overlay */
.acc-burger-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.acc-burger-overlay.is-open {
    opacity: 1;
    visibility: visible;
}

/* Navigation links */
.acc-burger-nav {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
    padding-left: 5vw;
}

.acc-burger-link {
    font-family: "Segoe UI", "Inter", sans-serif;
    font-size: 1.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: #f0f0f0;
    text-decoration: none;
    transition: color 0.2s ease, transform 0.2s ease;
    position: relative;
}

.acc-burger-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #ff3333;
    transition: width 0.3s ease;
}

.acc-burger-link:hover {
    color: #ff3333;
    transform: translateX(5px);
}

.acc-burger-link:hover::after {
    width: 100%;
}

/* Responsive */
@media (max-width: 768px) {
    .acc-burger-toggle {
        top: 15px;
        left: 15px;
        width: 44px;
        height: 44px;
    }

    .acc-burger-link {
        font-size: 1.4rem;
    }

    .acc-burger-nav {
        gap: 1.2rem;
        padding-left: 5vw;
    }
}