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

body{
    font-family: Arial, sans-serif;
    background:#def7ff;
    min-height:100vh;
}

/* Navbar */

nav{
    width:100%;
    padding:8px 25px;
    display:flex;
    justify-content:space-between;
    align-items:center;
    background:white;
    border-bottom:1px solid rgba(0,0,0,0.1);
    box-shadow:0 2px 8px rgba(0,0,0,0.08);
}

.brand{
    display:flex;
    align-items:center;
    gap:10px;
}

.brand img{
    width:55px;
    height:55px;
    background:white;
    padding:1px;
}

.brand h1{
    font-family:'Orbitron', sans-serif;
    font-size:28px;
    margin-bottom:2%;
    letter-spacing:2px;
}

.mech a{
    text-decoration: none;
    color:#012043;
}

.circuits a{
    text-decoration: none;
    color:#004fd6;
}

nav ul{
    display:flex;
    align-items: center;
    list-style:none;
    gap:30px;
}

nav ul li a{
    text-decoration:none;
    text-align: center;
    color:rgba(0, 44, 201, 0.811);
    transition:0.3s;
    font-size:18px;
    font-family: Arial, sans-serif;
}

nav ul li a:hover{
    color:#21cfff;
}

.contact-menu{
    position:relative;
}

.contact-box{
    display:none;
    position:absolute;
    top:35px;
    right:0;
    background:white;
    color:#012043;
    padding:12px 18px;
    border-radius:10px;
    box-shadow:0 4px 12px rgba(0,0,0,0.15);
    width:280px;
    font-family:Arial, sans-serif;
    z-index:1000;
}

.feedback-menu{
    position:relative;
}

.feedback-box{
    display:none;
    position:absolute;
    top:40px;
    right:0;
    width:290px;
    background:white;
    color:#012043;
    padding:15px;
    border-radius:10px;
    box-shadow:0 4px 12px rgba(0,0,0,0.15);
    font-family:Arial, sans-serif;
    z-index:1000;
}

/* Main Layout */

.main{
    display:flex;
    justify-content:center;
    align-items:flex-start;
    gap:25px;
    padding:40px 20px;
    flex-wrap:wrap;
}

/* Side Boxes + Calculator Same Size */

.side-box,
.container{
    background:#ffffff;
    width:450px;
    min-height:500px;
    padding:28px;
    border-radius:18px;
    box-shadow:0 4px 15px rgba(82,82,82,0.18);
}

.container{
    text-align:center;
}
.side-box h2{
    text-align: center;
    margin-bottom:15px;
    color:#003366;
    font-family:Arial, sans-serif;
    font-size:25px;
}

.side-box ul{
    padding-left: 5dvh;
    padding-top: 1dvb;
    padding-right: 3dvh;
    margin-bottom:20px;
}

.side-box li{
    margin-bottom:20px;
}

/* Bottom Info Card */

.info-card{
    width:calc(100% - 40px);
    max-width:1400px;

    margin:0 auto 40px auto;

    background:white;
    padding:30px;
    padding-left: 3%;

    border-radius:18px;

    box-shadow:0 4px 15px rgba(82,82,82,0.18);
}

.info-card h2{
    color:#003366;
    margin-bottom:15px;
    font-size:28px;
}

.info-card p{
    line-height:1.8;
    margin-left: 10%;
    color:#333;
    font-size:17px;
}

.container h1{
    color:#000000;
    margin-bottom:20px;
}

input, select{
    width:90%;
    padding:10px;
    margin:10px 0;
    border:2px solid #636363;
    border-radius:8px;
    font-size:16px;
    color:black;
}

input:focus, select:focus{
    outline:none;
    border-color:#00bcd4;
    box-shadow:0 0 8px #00bcd4;
}

button{
    background:#00e5ff;
    border:2px solid #0097a7;
    padding:10px 20px;
    border-radius:8px;
    font-size:16px;
    cursor:pointer;
    margin-top:10px;
    transition:0.3s;
}

button:hover{
    background:#00bcd4;
}

.battery-container{
    display:flex;
    justify-content:center;
    margin-top:25px;
}

.battery{
    width:120px;
    height:50px;
    border:3px solid #000000;
    border-radius:8px;
    position:relative;
    overflow:hidden;
}

.battery::after{
    content:"";
    position:absolute;
    right:-10px;
    top:14px;
    width:8px;
    height:18px;
    background:#000000;
    border-radius:2px;
}

.battery-level{
    height:100%;
    width:0%;
    background:limegreen;
    transition:0.5s;
}

.result{
    margin-top:15px;
    font-size:22px;
    color:black;
}

.details{
    margin-top:10px;
    color:#7b7b7b;
}

/* Graph Container */

.graph-container{
    position:relative;
    width:100%;
    height:360px;
    margin-top:10px;
}

/* Mobile Responsive */

@media (max-width: 1000px){

    .main{
        flex-direction:column;
        align-items:center;
        padding:20px 10px;
    }

    .side-box,
    .container{
        width:90%;
        max-width:500px;
    }

    .info-card{
        width:95%;
        padding:20px;
    }
}

@media (max-width: 600px){

    nav{
        flex-direction:column;
        align-items:center;
        gap:10px;
        padding:12px;
    }

    .brand h1{
        font-size:20px;
        text-align:center;
    }

    nav ul{
        flex-direction:column;
        gap:12px;
        padding:0;
    }

    .side-box,
    .container{
        width:95%;
        padding:18px;
    }

    .info-card{
        width:95%;
        padding:18px;
        font-size:15px;
    }

    input, select{
        width:100%;
    }

    button{
        width:100%;
    }
}