/* ── Base Reset & Custom Properties ── */
    *, *::before, *::after {
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

    body {
        margin: 0;
        overflow-x: hidden;
    }

    ::selection {
        background-color: rgba(123, 45, 59, 0.15);
        color: #7B2D3B;
    }

    /* ── Scrollbar ── */
    ::-webkit-scrollbar {
        width: 6px;
    }
    ::-webkit-scrollbar-track {
        background: #fdf8f8;
    }
    ::-webkit-scrollbar-thumb {
        background: #f2a8b8;
        border-radius: 3px;
    }
    ::-webkit-scrollbar-thumb:hover {
        background: #d14161;
    }

    /* ── Mobile Menu Animation ── */
    #mobile-menu.open {
        opacity: 1;
        pointer-events: all;
    }

    #mobile-menu .mobile-link {
        transform: translateY(20px);
        opacity: 0;
        transition: transform 0.4s ease, opacity 0.4s ease;
    }

    #mobile-menu.open .mobile-link {
        transform: translateY(0);
        opacity: 1;
    }

    #mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.1s; }
    #mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.15s; }
    #mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.2s; }
    #mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.25s; }
    #mobile-menu.open .mobile-link:nth-child(5) { transition-delay: 0.3s; }

    /* ── Hamburger Animation ── */
    #menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(3px, 3px);
    }
    #menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    #menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(3px, -3px);
    }

    /* ── Fade-in on Scroll (progressive enhancement) ── */
    @media (prefers-reduced-motion: no-preference) {
        .fade-up {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
    }

    @media (prefers-reduced-motion: reduce) {
        .fade-up {
            opacity: 1;
            transform: none;
            transition: none;
        }
    }

    /* ── Navbar glass effect ── */
    #navbar.scrolled {
        background-color: rgba(254, 248, 248, 0.92);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        box-shadow: 0 1px 0 rgba(123, 45, 59, 0.06);
    }

    /* ── Hero card float animation ── */
    @media (prefers-reduced-motion: no-preference) {
        .float-slow {
            animation: float 6s ease-in-out infinite;
        }
        .float-fast {
            animation: float 4.5s ease-in-out infinite;
            animation-delay: -2s;
        }
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }
    }