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

body {
    font-family: Arial, Helvetica, sans-serif;
    background: linear-gradient(135deg, #dff3e3, #b7dfbd);
    color: #26352a;
}

.container {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
}

.card {
    width: 700px;
    max-width: 100%;
    background: #ffffff;
    border-radius: 25px;
    padding: 45px;
    text-align: center;
    box-shadow: 0 20px 50px rgba(31, 90, 40, 0.18);
}

/* =========================
   LOGO
========================= */

.logo-container {
    width: 115px;
    height: 115px;
    margin: 0 auto 20px;
    border-radius: 50%;
    overflow: hidden;
    border: 5px solid #d8efdc;
    background: #2e7d32;
}

.logo-container img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    border-radius: 50%;
}

/* =========================
   BADGE
========================= */

.badge {
    display: inline-block;
    padding: 8px 17px;
    background: #e8f5e9;
    color: #2e7d32;
    border-radius: 30px;
    font-size: 12px;
    font-weight: bold;
    letter-spacing: 1px;
    margin-bottom: 15px;
}

/* =========================
   JUDUL
========================= */

h1 {
    font-size: 36px;
    color: #1b5e20;
    margin-bottom: 10px;
}

.kelas {
    font-size: 15px;
    color: #78909c;
}

.garis {
    width: 60px;
    height: 4px;
    background: #43a047;
    border-radius: 10px;
    margin: 25px auto;
}

/* =========================
   TENTANG
========================= */

.about {
    background: #f3faf4;
    border: 1px solid #dcefe0;
    border-radius: 18px;
    padding: 25px;
    margin-bottom: 20px;
}

.about h2 {
    color: #2e7d32;
    font-size: 21px;
    margin-bottom: 12px;
}

.about p {
    color: #53665a;
    font-size: 15px;
    line-height: 1.8;
}

/* =========================
   INFORMASI
========================= */

.informasi {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.box {
    flex: 1;
    padding: 22px 10px;
    background: #ffffff;
    border: 1px solid #dcefe0;
    border-radius: 17px;
    transition: 0.3s;
}

.box:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(46, 125, 50, 0.12);
}

.icon {
    font-size: 28px;
    margin-bottom: 10px;
}

.box h3 {
    color: #2e7d32;
    font-size: 15px;
    margin-bottom: 7px;
}

.box p {
    color: #607d68;
    font-size: 14px;
}

/* =========================
   MATERI
========================= */

.materi {
    background: #f8fbf8;
    border-radius: 18px;
    padding: 25px;
    margin-bottom: 25px;
}

.materi h2 {
    color: #2e7d32;
    font-size: 21px;
    margin-bottom: 15px;
}

.tag-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}

.tag-container span {
    background: #2e7d32;
    color: white;
    padding: 9px 17px;
    border-radius: 30px;
    font-size: 13px;
    font-weight: bold;
}

/* =========================
   FOOTER
========================= */

footer {
    display: flex;
    justify-content: space-between;
    border-top: 1px solid #eeeeee;
    padding-top: 18px;
    color: #90a497;
    font-size: 12px;
}

/* =========================
   RESPONSIVE
========================= */

@media screen and (max-width: 600px) {

    .container {
        padding: 20px 12px;
    }

    .card {
        padding: 30px 18px;
        border-radius: 20px;
    }

    .logo-container {
        width: 95px;
        height: 95px;
    }

    h1 {
        font-size: 28px;
    }

    .informasi {
        display: block;
    }

    .box {
        margin-bottom: 10px;
    }

    footer {
        display: block;
        line-height: 2;
    }
}