*,
*:before,
*:after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

/* BODY */
body {
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
    font-family: sans-serif;
    text-align: center;
}

body > header {
    width: 100%;
    height: 4rem;
    background-color: #282c34;
    position: fixed;
    color: white;
}

/* HEADER */
.header-container {
    width: 60rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0 auto;
}

.header-container > div {
    height: 4rem;
    line-height: 4rem;
}

/* MAIN */
main {
    padding-top: 5rem;
}

.background {
    height: 8rem;
    align-items: center;
}

/* HOME PAGE */
.home-page {
    background-color: #ffffff;
    width: 60rem;
    margin: 0 auto;
    padding: 1rem;
}

.project-container {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.project-page {
    background-color: #f9f9f9;
    min-height: 30rem;
    width: 60rem;
    margin: 0 auto;
    margin-bottom: 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* PROJECT CARDS (home page) */
.project-card {
    background-color: rgb(190, 193, 198);
    padding: 1rem;
    height: 10rem;
    margin-top: 2rem;
    width: 100%;
    text-align: left;
    flex: 1;
    border-radius: 0.5rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.2);
}

.hideAll {
    display: none;
}

.pointer {
    cursor: pointer;
}

.skills {
    height: 8rem;
    background-color: #ffffff;
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
}

/* CONTACT ME PAGE */
.contact-me {
    height: 8rem;
    background-color: #ffffff;
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
}

/* FOOTER */
.footer {
    width: 100%;
    height: 4rem;
    background-color: #282c34;
    color: white;
    line-height: 4rem;
    text-align: center;
}

/* ===== PROJECT DETAILS (3 BOX LAYOUT) ===== */
.project-details {
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    gap: 1.5rem;
    width: 90%;
    margin: 2rem auto;
    flex-wrap: wrap;
}

/* Grey boxes for each project section */
.project-box {
    background-color: #d3d3d3; /* light grey */
    border-radius: 1rem;
    padding: 1.5rem;
    flex: 1 1 30%;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    text-align: left;
    min-width: 16rem;
}

.project-box h2 {
    color: #282c34;
    font-size: 1.3rem;
    margin-bottom: 1rem;
    text-align: center;
}

.project-box p,
.project-box ul {
    color: #000;
    line-height: 1.6;
}

.project-box ul {
    margin-left: 1.5rem;
}
/* =========================================
   MOBILE RESPONSIVE DESIGN
   ========================================= */

/* Phones & small tablets (0–768px) */
@media (max-width: 768px) {

    html {
        font-size: 14px;
    }

    /* HEADER */
    .header-container {
        max-width: 100%;
        width: 100%;
        padding: 0 1rem;
    }

    body > header {
        height: 4rem;
    }

    /* MAIN WRAPPER */
    main {
        padding-top: 5rem;
    }

    /* HOME PAGE BASE */
    .home-page,
    .project-page {
        width: 100%;
        max-width: 100%;
        padding: 1rem;
    }

    /* PROJECT CARDS */
    .project-container {
        flex-direction: column;
        gap: 1rem;
    }

    .project-card {
        width: 100%;
        height: auto;
        min-height: 8rem;
        flex: none;
    }

    /* PROJECT DETAILS (3 box layout → stacked layout) */
    .project-details {
        flex-direction: column;
        width: 100%;
        gap: 1rem;
    }

    .project-box {
        width: 100%;
        flex: none;
        min-width: auto;
    }

    /* SKILLS & CONTACT */
    .skills,
    .contact-me {
        width: 100%;
        padding: 1.5rem 1rem;
    }

    /* FOOTER */
    .footer {
        font-size: 0.9rem;
    }
}

/* Very small screens (0–480px) */
@media (max-width: 480px) {

    html {
        font-size: 13px;
    }

    .header-container {
        flex-direction: column;
        justify-content: center;
        text-align: center;
    }

    .project-card {
        padding: 1rem;
    }

    .project-box h2 {
        font-size: 1.1rem;
    }
}