body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    width: 100vw;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: #ffffff;
    color: #0a2a5c;
}

/* ----------------------------- */
/* ------- HEADER & NAV -------- */
/* ----------------------------- */

header {
    width: 100%;
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: space-around;
    align-items: center;
    padding: 20px 0;
    background: linear-gradient(to bottom, #cce8f8, #a8d8f0);
    border-bottom: 1px solid #c8dff0;
}

header h1 {
    font-size: 1.5rem;
    color: #0a2a5c;
    font-weight: 500;
    letter-spacing: -0.5px;
    margin-right: 10px;
}

.burger-btn {
    display: none;
    cursor: pointer;
    border: none;
    background: none;
    padding: 10px;
    margin-bottom: 10px;
    z-index: 100;
}

.burger-btn .bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px 0;
    background-color: #0a2a5c;
    border-radius: 3px;
    transition: all 0.3s ease;
}

.navigation-bar {
    width: 80%;
}

.nav-list {
    width: 100%;
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    align-items: center;
    list-style: none;
    padding: 0;
}

.nav-list li {
    margin: 10px;
    width: 26.67%;
    text-align: center;
    justify-content: center;
}

.nav-list details summary {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    list-style: none;
}
.nav-list details summary::after {
    content: " ▼";
    font-size: 1rem;
    color: #5ab4f0;
}

.nav-link, button, summary {
    margin: 10px;
    width: 33.3333%;
    background-color: transparent;
    color: #0a2a5c;
    border: none;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    text-decoration: none;
}

.nav-link:hover, button:hover, summary:hover {
    color: #5ab4f0;
    transform: translateY(-1px);
}

details {
    position: relative;
    color: #0a2a5c;
}

details .dropdown-content {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: #f2f8fd;
    z-index: 10;
    border-radius: 8px;
    border: 1px solid #f2f8fd;
    box-shadow: 0 10px 15px -3px rgba(10, 42, 92, 0.1);
    display: flex;
    flex-direction: column;
    padding: 10px 0;
}

details .dropdown-content a {
    padding: 10px;
    width: 100%;
    display: block;
    color: #0a2a5c;
    text-decoration: none;
    font-size: 0.9rem;
}

details .dropdown-content a:hover {
    background-color: #daeef8;
}
/* ----------------------------- */
/* ------- Main         -------- */
/* ----------------------------- */

main {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: linear-gradient(to bottom, #a8d8f0 0%, #5ab0e8 20%, #1565a0  40%, #083060 60%, #021828 80%, #010d18 100%);
    padding-bottom: 5rem;
    margin-bottom: -1px;
}

.svg-wave-container {
    width: 100%;
    line-height: 0;
}

.svg-wave-container svg {
    width: 100%;
    height: auto;
    margin-bottom: -1px;
}

/* ----------------------------- */
/* --- Article Box Styling --- */
/* ----------------------------- */

.main-container {
    width: 70%;
    max-width: 1100px;
    background-color: rgb(255 255 255 / 0.93);
    border-radius: 16px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);

    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4rem;

    padding: 3rem 4rem;
}

.main-container h2 {
    width: 100%;
    text-align: center;
    color: #0369a1;
    font-size: 2.5rem;
    margin: 0;
    padding-bottom: 1rem;
    border-bottom: 2px solid #e0f2fe;
}

/* ----------------------------- */
/* --- Section Templates ------- */
/* ----------------------------- */

.content-block {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.content-block h3 {
    width: 100%;
    text-align: left;
    color: #0a2a5c;
    font-size: 1.8rem;
    margin: 0;
}

.content-row {
    width: 100%;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 3rem;
}

.content-row p {
    flex: 1;
    color: #1e293b;
    line-height: 1.6;
    text-align: left;
}

.bubble-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #c8dff0;
    box-shadow: 0 8px 20px rgba(10, 42, 92, 0.15);
    flex-shrink: 0;

    color: transparent;
    background-color: #f2f8fd;

    position: relative;
}

.bubble-image::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
}
.bubble-image::after {
    content: attr(alt);
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;

    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;

    color: #0a2a5c;
    font-style: italic;
    font-size: 0.9rem;
    padding: 1.5rem;
    box-sizing: border-box;
    line-height: 1.4;
}

/* ----------------------------- */
/* ------- Footer       -------- */
/* ----------------------------- */

footer {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #010d18;
    color: #3a6a9a;
    height: 20vh;
}

/* ---------------------- */
/* --- MOBILE SCREEN  --- */
/* ---------------------- */

@media (max-width: 768px) {
    header {
        flex-wrap: wrap;
        justify-content: space-between;
        padding: 15px 25px;
    }

    .burger-btn {
        display: block;
        order: 1;
        margin: 0;
    }

    .hero-section {
        order: 2;
    }

    .navigation-bar {
        display: none;
        width: 100%;
        order: 3;
        margin-top: 15px;
        background-color: transparent;
    }

    .navigation-bar.active {
        display: block;
        animation: fadeIn 0.3s ease;
    }

    .nav-list {
        flex-direction: column;
        align-items: center;
        justify-content: center;
        width: 100%;
    }

    .nav-list li {
        width: 100%;
        margin: 0;
    }

    .nav-link, details, summary {
        width: 100%;
        margin: 0;
        padding: 15px 0;
    }

    details .dropdown-content {
        position: relative;
        box-shadow: none;
        border: none;
        background-color: rgba(255, 255, 255, 0.3);
        margin-top: 10px;
    }

    .main-container {
        width: 90%;
        padding: 2rem 1.5rem;
    }

    .content-row {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
    }

    .content-row p {
        text-align: center;
    }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}