/* ================= RESET ================= */

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

/* ================= BODY ================= */

body{
    font-family:Arial, Helvetica, sans-serif;
    background:linear-gradient(135deg,#111827,#1f2937,#312e81);
    color:white;
    min-height:100vh;
}

/* ================= HEADER ================= */

header{
    text-align:center;
    padding:40px 20px;
}

header h1{
    font-size:50px;
    margin-bottom:10px;
}

/* ================= HERO ================= */

.hero{
    text-align:center;
    padding:80px 20px;
}

.hero h2{
    font-size:50px;
    margin-bottom:20px;
}

.hero p{
    margin-bottom:30px;
}

.hero button{
    padding:15px 35px;
    border:none;
    border-radius:40px;
    background:#06b6d4;
    color:white;
    font-size:18px;
    cursor:pointer;
}

/* ================= ACTIVITIES ================= */

.activities{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(320px,1fr));
    gap:30px;
    padding:40px;
}

/* ================= CARD ================= */

.card{
    background:rgba(255,255,255,0.08);
    padding:30px;
    border-radius:25px;
    backdrop-filter:blur(10px);
    box-shadow:0 10px 30px rgba(0,0,0,0.3);
}

/* ================= BUTTON ================= */

button{
    padding:12px 20px;
    border:none;
    border-radius:10px;
    background:#8b5cf6;
    color:white;
    cursor:pointer;
    margin:10px 5px;
}

/* ================= INPUT ================= */

input{
    width:100%;
    padding:12px;
    margin:10px 0;
    border:none;
    border-radius:10px;
}

/* ================= LIST ================= */

ul{
    list-style:none;
}

li{
    background:rgba(255,255,255,0.1);
    padding:10px;
    margin:8px 0;
    border-radius:10px;
}

/* ================= IMAGE ================= */

img{
    margin-top:20px;
    border-radius:20px;
}

/* ================= DARK MODE ================= */

.dark-mode{
    background:black;
}

/* ================= ACTIVITY 3 ================= */

.container{
    background:#fff;
    padding:30px;
    border-radius:20px;
    width:100%;
    color:#333;
}

.container h1{
    text-align:center;
    color:#2c313b;
    margin-bottom:20px;
}

.container h3{
    color:#3b383e;
    margin:15px 0 5px 0;
}

.container label{
    display:block;
    margin-top:10px;
    font-weight:600;
}

.container input[type="number"]{
    width:100%;
    padding:10px;
    margin-top:5px;
    border-radius:8px;
    border:1px solid #ccc;
}

.container button{
    width:100%;
}

#quizContainer div{
    background:#f9f9f9;
    padding:12px;
    margin:8px 0;
    border-radius:10px;
    border-left:4px solid #2575fc;
}

.result{
    margin-top:20px;
    padding:15px;
    border-radius:12px;
    background:#f0f0f0;
    text-align:center;
    color:#333;
}