* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', sans-serif;
    background-color: lightgray;
    color: #1F2A44;
    line-height: 1.7;
    font-size: 24px;
    scroll-behavior: smooth;
}


header {
    background-color: #1F2A44; /
    color: white;
    padding: 2.5rem 1rem;
    text-align: center;
}

header h1 {
    font-size: 2.4rem;
    margin-bottom: 0.5rem;
    color: white;
}

header p {
    font-size: 1.2rem;
    color: white;
}


nav {
    background-color: #2c3e50;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem;
}

nav a {
    color: #F6F1EB;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #A8BCA1;
}


main {
    max-width: 960px;
    margin: 2rem auto;
    padding: 0 1rem;
}


main > div {
    background-color: white;
    margin-bottom: 2rem;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

main > div:hover {
    transform: translateY(-3px);
}

main > div:nth-of-type(even) {
    background-color: #D8E2DC;
}


h2 {
    font-size: 2rem;
    color: #1F2A44;
    margin-bottom: 1rem;
}


ul {
    padding-left: 1.5rem;
}

ul li {
    margin-bottom: 0.7rem;
}


.price {
    background-color: #A8BCA1;
    padding: 1.5rem;
    border-radius: 12px;
    color: #1F2A44;

}

#scrollTopBtn {
    position: fixed;
    right: calc(16px + env(safe-area-inset-right, 0));
    bottom: calc(16px + env(safe-area-inset-bottom, 0));
    z-index: 999;
    width: 56px;
    height: 56px;
    border: none;
    border-radius: 9999px;
    cursor: pointer;
    background: linear-gradient(135deg, #1F2A44, #4b5d82);
    color: #F6F1EB;
    font-size: 1.35rem;
    line-height: 1;
    box-shadow: 0 8px 22px rgba(0,0,0,0.22);
    transition: transform 0.25s ease, opacity 0.25s ease, background 0.25s ease;
    opacity: 0;
    pointer-events: none;

    outline: none;
}

#scrollTopBtn.show {
    opacity: 1;
    pointer-events: auto;
    transform: translateZ(0);
}

#scrollTopBtn:active {
    transform: scale(0.96);
    background: linear-gradient(135deg, #A8BCA1, #7ba784);
    color: #1F2A44;
}

#scrollTopBtn:focus-visible {
    box-shadow:
            0 0 0 3px rgba(248, 250, 252, 0.9),
            0 0 0 6px rgba(168, 188, 161, 0.9);
}

@media (pointer: coarse) {
    #scrollTopBtn {
        width: 64px;
        height: 64px;
        font-size: 1.5rem;
        right: calc(20px + env(safe-area-inset-right, 0));
        bottom: calc(20px + env(safe-area-inset-bottom, 0));
    }
}

@media (max-width: 480px) {
    #scrollTopBtn {
        right: calc(14px + env(safe-area-inset-right, 0));
        bottom: calc(14px + env(safe-area-inset-bottom, 0));
    }
}


@media (prefers-reduced-motion: reduce) {
    #scrollTopBtn {
        transition: none;
    }
}




a {
    color: #1F2A44;
    text-decoration: underline;
}

a:hover {
    color: #2c3e50;
}


footer {
    background-color: #1F2A44;
    color: white;
    text-align: center;
    padding: 1.2rem;
    margin-top: 3rem;
    font-size: 1rem;
}


@media (max-width: 768px) {
    body {
        font-size: 17px;
    }

    header h1 {
        font-size: 2rem;
    }

    header p {
        font-size: 1rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    main > div {
        padding: 1.5rem;
    }

    nav {
        flex-direction: column;
        align-items: center;
    }

    nav a {
        font-size: 1rem;
        margin: 0.5rem 0;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 16px;
    }

    header h1 {
        font-size: 1.6rem;
    }

    h2 {
        font-size: 1.3rem;
    }
}