/* Header Styles */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text);
    font-weight: 800;
    font-size: 1.5rem;
}

.brand-logo {
    height: 60px;
    display: block;
}

.nav {
    display: flex;
    align-items: center;
    gap: 24px;
}

    .nav a {
        text-decoration: none;
        color: var(--muted);
        font-weight: 600;
        transition: color 0.2s ease;
        position: relative;
    }

        .nav a:hover {
            color: var(--text);
        }

        .nav a:after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width 0.3s ease;
        }

        .nav a:hover:after {
            width: 100%;
        }

/* Buttons */
.button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    font-weight: 700;
    cursor: pointer;
    border: 0;
    border-radius: var(--radius);
    padding: 14px 24px;
    background: var(--primary);
    color: #fff;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
    justify-content: center;
}

    .button:hover {
        background: var(--primary-600);
        transform: translateY(-2px);
        box-shadow: var(--shadow-lg);
        color: #fff;
    }

.button-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

    .button-outline:hover {
        background: var(--primary);
        color: white;
    }

.button.small {
    padding: 10px 16px;
    font-size: 14px;
}

.button-preorder {
    background: var(--primary);
    color: #fff !important;
}

    .button-preorder:hover {
        background: var(--primary-600);
        color: #fff !important;
    }

/* Accessibility helper */
.visually-hidden {
    position: absolute !important;
    height: 1px;
    width: 1px;
    overflow: hidden;
    clip: rect(1px, 1px, 1px, 1px);
    white-space: nowrap;
}

/* Prevent background scroll when menu is open (JS toggles .no-scroll on <body>) */
.no-scroll {
    overflow: hidden;
}

/* Hidden checkbox used for CSS-only toggle */
.menu-toggle {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

/* Hamburger button */
.menu-btn {
    display: none;
    border: 1px solid var(--border);
    background: #fff;
    border-radius: var(--radius);
    padding: 10px 12px;
    cursor: pointer;
    line-height: 0;
}

/* Hamburger icon (pure CSS, no Font Awesome needed) */
.menu-icon,
.menu-icon::before,
.menu-icon::after {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    position: relative;
    transition: transform 0.3s ease, opacity 0.3s ease, top 0.3s ease;
}

    .menu-icon::before,
    .menu-icon::after {
        content: '';
        position: absolute;
        left: 0;
    }

    .menu-icon::before {
        top: -7px;
    }

    .menu-icon::after {
        top: 7px;
    }

/* Backdrop (click to close) */
.nav-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.35);
    z-index: 100; /* higher than page, lower than the dropdown menu */
}

/* Responsive header */
@media (max-width: 768px) {
    .menu-btn {
        display: inline-block;
    }

    .nav {
        display: none; /* hidden by default on mobile */
    }

    /* Show dropdown when checkbox is checked */
    .menu-toggle:checked ~ .nav {
        display: flex;
        flex-direction: column;
        position: absolute;
        right: 4%;
        top: 70px;
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 20px;
        box-shadow: var(--shadow-lg);
        gap: 16px;
        width: 220px;
        z-index: 1001;
    }

    /* Animate hamburger into an "X" */
    .menu-toggle:checked ~ .menu-btn .menu-icon {
        transform: rotate(45deg);
    }

        .menu-toggle:checked ~ .menu-btn .menu-icon::before {
            top: 0;
            transform: rotate(90deg);
        }

        .menu-toggle:checked ~ .menu-btn .menu-icon::after {
            opacity: 0;
        }

    /* Show backdrop when open */
    .menu-toggle:checked ~ .nav-backdrop {
        display: block;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .site-header,
    .nav a:after,
    .button,
    .menu-icon,
    .menu-icon::before,
    .menu-icon::after {
        transition: none !important;
    }
}
