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

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f9f9f9;
}

/* ─── MOBILE MENU TOGGLE ──────────────────────────────── */
.menu-toggle {
    display: none;
}

.menu-icon {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 2000;
    width: 48px;
    height: 48px;
    background: #004d66;
    color: white;
    font-size: 2.4rem;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    cursor: pointer;
    user-select: none;
}

.hamburger { display: block; }
.close      { display: none;  }

#menu-toggle:checked ~ .menu-icon .hamburger { display: none;  }
#menu-toggle:checked ~ .menu-icon .close     { display: block; }

/* ─── SIDEBAR ─────────────────────────────────────────── */
.sidebar {
    width: 260px;
    height: 100vh;
    background: #004d66;
    color: white;
    position: fixed;
    top: 0;
    left: 0;
    padding: 24px 20px;
    transition: transform 0.35s ease;
    z-index: 1500;
}

.brand {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 48px;
}

.sidebar nav ul {
    list-style: none;
}

.sidebar nav ul li {
    margin: 20px 0;
}

.sidebar a {
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 500;
    transition: color 0.2s;
}

.sidebar a:hover,
.sidebar a:focus {
    color: #00cc99;
}

/* ─── MAIN CONTENT ────────────────────────────────────── */
.main-content {
    margin-left: 260px;
    transition: margin-left 0.35s ease;
    min-height: 100vh;
}

header {
    background: #004d66;
    color: white;
    padding: 24px 40px;
}

header h1 {
    font-size: 1.9rem;
    font-weight: 700;
}

/* ─── SECTIONS ────────────────────────────────────────── */
.hero {
    background: #e6f4f1;
    padding: 120px 40px;
    color: #004d66;
}

.hero-text {
    max-width: 680px;
}

.hero h2 {
    font-size: 2.8rem;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 32px;
}

.btn {
    padding: 12px 32px;
    background: #00cc99;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: background 0.2s;
}

.btn:hover {
    background: #009f77;
}

.section {
    padding: 80px 40px;
}

.light {
    background: #f8f9fa;
}

h2 {
    font-size: 2.2rem;
    color: #004d66;
    text-align: center;
    margin-bottom: 48px;
}

.cards {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
    justify-content: center;
}

.card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    overflow: hidden;
    flex: 1 1 300px;
    max-width: 360px;
    transition: transform 0.25s, box-shadow 0.25s;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.12);
}

.card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card h3 {
    padding: 0 24px;
    margin: 20px 0 12px;
    color: #004d66;
    font-size: 1.35rem;
}

.card p {
    padding: 0 24px 24px;
    color: #555;
    font-size: 0.98rem;
    line-height: 1.5;
}

.card button {
    display: block;
    margin: 0 24px 24px;
    padding: 10px 24px;
    background: #004d66;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

.card button:hover {
    background: #00cc99;
}

.social-icons {
    margin-top: 24px;
    text-align: center;
}

.social-icons a {
    color: #004d66;
    font-size: 2rem;
    margin: 0 12px;
    transition: color 0.2s;
}

.social-icons a:hover {
    color: #00cc99;
}

footer {
    text-align: center;
    padding: 32px;
    background: #003d4d;
    color: white;
    margin-top: 60px;
}

/* ─── MOBILE RESPONSIVE ───────────────────────────────── */
@media (max-width: 768px) {

    .menu-icon {
        display: flex;
    }

    .sidebar {
        transform: translateX(-100%);
    }

    #menu-toggle:checked ~ .sidebar {
        transform: translateX(0);
    }

    #menu-toggle:checked ~ .main-content {
        margin-left: 0;
    }

    .main-content {
        margin-left: 0;
    }

    header {
        padding: 20px;
        text-align: center;
    }

    header h1 {
        font-size: 1.6rem;
    }

    .hero {
        padding: 80px 24px;
        text-align: center;
    }

    .hero h2 {
        font-size: 2.2rem;
    }

    .section {
        padding: 60px 24px;
    }

    .cards {
        flex-direction: column;
        align-items: center;
    }

    .card {
        max-width: 100%;
    }
}