*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:'Poppins',sans-serif;
}

body{
   background:#050505;
    color:#ffffff;
    min-height:100vh;
    transition:0.4s;
}

/* NAVBAR */

.navbar{
    width:100%;
    padding:20px 8%;
    display:flex;
    justify-content:space-between;
    align-items:center;
    background:#0a0a0a;
    border-bottom:1px solid #00f3ff;
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.4);
    position:sticky;
    top:0;
    z-index:100;
}

.logo{
    font-size:24px;
    font-weight:700;
    color:#00f3ff;
    text-shadow: 0 0 10px #00f3ff;
}

.nav-menu{
    display:flex;
    list-style:none;
    gap:15px;
}

.menu-btn{
    padding:10px 18px;
    border:1px solid #00f3ff;
    border-radius:12px;
    background:#0a0a0a;
    color:#00f3ff;
    cursor:pointer;
    transition:0.3s;
    font-weight:500;
    box-shadow: 0 0 5px rgba(0, 243, 255, 0.3);
}

.menu-btn:hover{
   background:#00f3ff;
    color:#000;
    box-shadow: 0 0 15px #00f3ff;
}

.menu-btn.active{
   background:#00f3ff;
    color:#000;
    box-shadow: 0 0 15px #00f3ff;
}

#themeToggle{
    width:45px;
    height:45px;
    border:1px solid #ff00ff;
    border-radius:50%;
    cursor:pointer;
    background:#0a0a0a;
    color:#ff00ff;
    font-size:18px;
    box-shadow: 0 0 10px rgba(255, 0, 255, 0.5);
    transition:0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}
#themeToggle:hover {
    background:#ff00ff;
    color:#000;
    box-shadow: 0 0 20px #ff00ff;
}

/* CONTAINER */

.container{
    width:100%;
    max-width:1200px;
    margin:auto;
    padding:40px 20px;
}

/* DISPLAY */

.display-box{
    text-align:center;
    margin-bottom:30px;
}

.display-box h1{
    font-size:40px;
    margin-bottom:10px;
    color: #00f3ff;
    text-shadow: 0 0 15px #00f3ff;
}

.display-box p{
    color:#94a3b8;
}

/* CALCULATOR */

.calculator{
    background:#0a0a0a;
    border:1px solid #ff00ff;
    border-radius:25px;
    padding:30px;
    box-shadow:0 0 25px rgba(255, 0, 255, 0.4);
}

/* INPUT */

.input-box{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:20px;
    margin-bottom:25px;
}

.input-box input{
    width:100%;
    padding:18px;
    border:1px solid #333;
    border-radius:15px;
    background:#111;
    color:#00f3ff;
    font-size:18px;
    outline:none;
    transition: 0.3s;
}

.input-box input:focus {
    border-color: #00f3ff;
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.5);
}


/* BUTTONS */

.buttons{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(100px,1fr));
    gap:15px;
}

.buttons button{
    padding:18px;
    border:1px solid #ff00ff;
    border-radius:15px;
    background:#111;
    color:#ff00ff;
    font-size:18px;
    font-weight:600;
    cursor:pointer;
    transition:0.3s;
    box-shadow: 0 0 8px rgba(255, 0, 255, 0.3);
}

.buttons button:hover{
    transform:translateY(-3px);
    background:#ff00ff;
    color:#000;
    box-shadow: 0 0 20px #ff00ff;
}

/* MENU */

.menu-content{
    display:none;
}

.menu-content.active{
    display:block;
}

/* HASIL */

.hasil{
    margin-top:30px;
    padding:25px;
    border:1px solid #00ffcc;
    border-radius:20px;
    background:#0a0a0a;
    box-shadow: 0 0 15px rgba(0, 255, 204, 0.3);
}

.hasil h2{
    margin-bottom:15px;
    color: #00ffcc;
    text-shadow: 0 0 10px #00ffcc;
}

.hasil p{
    font-size:30px;
    font-weight:bold;
    color:#00ffcc;
    text-shadow: 0 0 15px #00ffcc;
}

.detail{
    margin-top:20px;
}

.detail h3{
    margin-top:10px;
    margin-bottom:5px;
    color: #00f3ff;
}

.detail small{
    color:#cbd5e1;
}

/* LIGHT MODE */

.light-mode{
    background:#f1f5f9;
    color:#111;
}

.light-mode .navbar{
    background:white;
    border-bottom:1px solid #00f3ff;
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.4);
}

.light-mode .logo{
    color:#00f3ff;
    text-shadow: 0 0 5px rgba(0, 243, 255, 0.5);
}

.light-mode .menu-btn{
    background:#e2e8f0;
    color:#111;
    border: 1px solid transparent;
    box-shadow: none;
}
.light-mode .menu-btn.active{
    background:#00f3ff;
    color:#000;
    box-shadow: 0 0 15px #00f3ff;
}

.light-mode .calculator{
    background:white;
    border:1px solid #ff00ff;
    box-shadow:0 0 25px rgba(255, 0, 255, 0.2);
}

.light-mode .input-box input{
    background:#f1f5f9;
    color:#111;
    border: 1px solid #ccc;
}
.light-mode .input-box input:focus{
    border-color: #00f3ff;
    box-shadow: 0 0 10px rgba(0, 243, 255, 0.5);
}


.light-mode .hasil{
    background:#f8fafc;
    border: 1px solid #00ffcc;
    box-shadow: 0 0 15px rgba(0, 255, 204, 0.2);
}

.light-mode .display-box p{
    color:#475569;
}

/* RESPONSIVE */

@media(max-width:768px){

    .navbar{
        flex-direction:column;
        gap:20px;
    }

    .input-box{
        grid-template-columns:1fr;
    }

    .display-box h1{
        font-size:30px;
    }

}

.select-box{
    margin-bottom:20px;
}

.select-box select{
    width:100%;
    padding:18px;
    border:1px solid #333;
    border-radius:15px;
    background:#111;
    color:#00f3ff;
    font-size:16px;
    outline:none;
    transition: 0.3s;
}
.select-box select:focus {
    border-color: #00f3ff;
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.5);
}

/* LIGHT MODE SELECT */

.light-mode .select-box select{
    background:#f1f5f9;
    color:#111;
    border: 1px solid #ccc;
}
.light-mode .select-box select:focus {
    border-color: #00f3ff;
    box-shadow: 0 0 10px rgba(0, 243, 255, 0.5);
}

.selected-operasi{
    margin-top:20px;
    margin-bottom:20px;
    text-align:center;
    font-size:16px;
}

.selected-operasi span{
    color:#00f3ff;
    text-shadow: 0 0 10px rgba(0, 243, 255, 0.5);
}

.op-btn.selected{
    background:#ff00ff !important;
    color:#000 !important;
    transform:scale(1.05);
    box-shadow: 0 0 20px #ff00ff !important;
}

.hitung-btn{
    width:100%;
    padding:18px;
    border:1px solid #00ff00;
    border-radius:15px;
    background:#111;
    color:#00ff00;
    font-size:18px;
    font-weight:600;
    cursor:pointer;
    transition:0.3s;
    box-shadow: 0 0 10px rgba(0, 255, 0, 0.3);
}

.hitung-btn:hover{
    background:#00ff00;
    color:#000;
    box-shadow: 0 0 25px #00ff00;
}

/* NEW STYLES FOR FLEXIBLE TRANSFORMS */
.flex-row-select {
    display: flex;
    gap: 15px;
    align-items: center;
    margin-bottom: 20px;
}
.flex-row-select select {
    width: 100%;
    padding: 15px;
    border: 1px solid #333;
    border-radius: 10px;
    background: #111;
    color: #00f3ff;
    font-size: 16px;
    outline: none;
    transition: 0.3s;
}
.flex-row-select select:focus {
    border-color: #00f3ff;
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.5);
}
.light-mode .flex-row-select select {
    background: #f1f5f9;
    color: #111;
    border: 1px solid #ccc;
}

.sub-tab-btn {
    padding: 10px 15px;
    border: 1px solid #00f3ff;
    border-radius: 10px;
    background: #111;
    color: #00f3ff;
    cursor: pointer;
    font-weight: 500;
    transition: 0.3s;
    box-shadow: 0 0 5px rgba(0, 243, 255, 0.3);
}
.sub-tab-btn.active {
    background: #00f3ff;
    color: #000;
    box-shadow: 0 0 15px #00f3ff;
}
.light-mode .sub-tab-btn {
    background: #e2e8f0;
    color: #111;
    border: 1px solid transparent;
    box-shadow: none;
}
.light-mode .sub-tab-btn.active {
    background: #00f3ff;
    color: #000;
    box-shadow: 0 0 10px #00f3ff;
}

/* HISTORY */
.history-section {
    margin-top: 30px;
    padding: 25px;
    border: 1px solid #ff00ff;
    border-radius: 20px;
    background: #0a0a0a;
    box-shadow: 0 0 15px rgba(255, 0, 255, 0.2);
}
.history-section h2 {
    margin-bottom: 15px;
    color: #ff00ff;
    text-shadow: 0 0 10px rgba(255, 0, 255, 0.5);
}
.history-list {
    list-style: none;
    max-height: 400px;
    overflow-y: auto;
}
/* CUSTOM SCROLLBAR FOR HISTORY */
.history-list::-webkit-scrollbar {
    width: 8px;
}
.history-list::-webkit-scrollbar-track {
    background: #111;
    border-radius: 4px;
}
.history-list::-webkit-scrollbar-thumb {
    background: #ff00ff;
    border-radius: 4px;
    box-shadow: 0 0 5px #ff00ff;
}

.history-list li {
    padding: 15px;
    border-bottom: 1px solid #333;
}
.history-list li:last-child {
    border-bottom: none;
}
.history-item .history-result {
    font-size: 20px;
    font-weight: bold;
    color: #00ffcc;
    text-shadow: 0 0 8px rgba(0, 255, 204, 0.5);
    display: block;
    margin-bottom: 5px;
}
.history-detail {
    font-size: 14px;
    color: #cbd5e1;
}
.light-mode .history-section {
    background: #f8fafc;
    border: 1px solid #ff00ff;
}
.light-mode .history-list li {
    border-bottom: 1px solid #ddd;
}