/* =================================
   Mobile Hamburger Menu
   ================================= */

/* Hamburger button - hidden on desktop */
.hamburger-btn {
    display: none;
    position: fixed;
    top: max(var(--spacing-md), env(safe-area-inset-top));
    right: max(var(--spacing-md), env(safe-area-inset-right));
    z-index: 1002;
    background: var(--primary-blue);
    border: none;
    border-radius: var(--radius-md);
    padding: 12px;
    min-width: 48px;
    min-height: 48px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: background var(--transition-normal), transform var(--transition-fast);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.hamburger-btn:hover,
.hamburger-btn:focus-visible {
    background: var(--secondary-blue);
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 3px;
    background-color: white;
    border-radius: 2px;
    transition: all var(--transition-normal);
    transform-origin: center;
}

.hamburger-line+.hamburger-line {
    margin-top: 5px;
}

/* Hamburger animation when active */
.hamburger-btn.is-active .hamburger-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.hamburger-btn.is-active .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.hamburger-btn.is-active .hamburger-line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Mobile styles */
@media screen and (max-width: 768px) {
    body.menu-open {
        overflow: hidden;
    }

    .nav-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.45);
        z-index: 999;
        border: none;
        padding: 0;
        cursor: pointer;
        animation: menu-overlay-in 0.25s ease;
    }

    .nav-overlay[hidden] {
        display: none;
    }

    @keyframes menu-overlay-in {
        from {
            opacity: 0;
        }

        to {
            opacity: 1;
        }
    }

    .hamburger-btn {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }

    .tabs-nav {
        position: fixed;
        top: 0;
        left: 0;
        width: min(320px, 88vw);
        height: 100%;
        height: 100dvh;
        background: linear-gradient(180deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
        display: flex;
        flex-direction: column;
        flex-wrap: nowrap;
        justify-content: flex-start;
        align-items: stretch;
        align-content: flex-start;
        gap: var(--spacing-sm);
        padding: max(var(--spacing-2xl), env(safe-area-inset-top)) var(--spacing-lg) max(var(--spacing-lg), env(safe-area-inset-bottom));
        z-index: 1000;
        transform: translateX(-105%);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        box-shadow: var(--shadow-lg);
    }

    .tabs-nav.nav-open {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
    }

    .tabs-nav .tab {
        font-size: 1em;
        padding: var(--spacing-md) var(--spacing-lg);
        min-height: 48px;
        color: white;
        background: rgba(255, 255, 255, 0.1);
        border-radius: var(--radius-md);
        width: 100%;
        max-width: none;
        text-align: left;
        border: 1px solid rgba(255, 255, 255, 0.2);
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .tabs-nav .tab-group {
        width: 100%;
        max-width: none;
        display: flex;
        gap: var(--spacing-xs);
    }

    .tabs-nav .tab-group .tab {
        flex: 1;
    }

    .tabs-nav .submenu-toggle {
        color: white;
        background: rgba(255, 255, 255, 0.1);
        border: 1px solid rgba(255, 255, 255, 0.2);
        min-width: 48px;
        min-height: 48px;
        border-radius: var(--radius-md);
        touch-action: manipulation;
    }

    .tabs-nav .submenu-toggle:hover,
    .tabs-nav .submenu-toggle:focus-visible {
        background: rgba(255, 255, 255, 0.25);
        color: white;
    }

    .tabs-nav .tab:hover,
    .tabs-nav .tab.active {
        background: rgba(255, 255, 255, 0.25);
        color: white;
    }

    .tabs-nav .menu-item-wrapper {
        display: block;
        width: 100%;
        max-width: none;
        flex-shrink: 0;
    }

    .tabs-nav > .tab,
    .tabs-nav > .menu-item-wrapper {
        flex: 0 0 auto;
        width: 100%;
    }

    .tabs-nav .dropdown-menu {
        display: none;
        position: static;
        background: rgba(255, 255, 255, 0.08);
        border: none;
        box-shadow: none;
        margin-top: var(--spacing-xs);
        border-radius: var(--radius-md);
    }

    .tabs-nav .dropdown-menu.is-open {
        display: block;
    }

    .tabs-nav .dropdown-item {
        color: rgba(255, 255, 255, 0.95);
        border-bottom-color: rgba(255, 255, 255, 0.1);
        padding: var(--spacing-md);
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    .tabs-nav .dropdown-item:hover,
    .tabs-nav .dropdown-item.active {
        background: rgba(255, 255, 255, 0.15);
        color: white;
    }
}