/* ===== General Body Styles ===== */
body {
    font-family: Arial, sans-serif;
    background: linear-gradient(120deg, #89f7fe, #66a6ff);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
    transition: background 0.4s, color 0.4s;
    padding: 20px;
}

/* ===== Theme Toggle Button ===== */
.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
}
.theme-toggle button {
    background: #333;
    color: white;
    padding: 10px 18px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 16px;
    transition: 0.3s;
}
.theme-toggle button:hover {
    transform: scale(1.05);
}

/* ===== Calculator Card ===== */
.calculator {
    background: white;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0px 8px 25px rgba(0,0,0,0.25);
    width: 100%;
    max-width: 500px;
    animation: fadeIn 1s ease-in-out;
    transition: background 0.4s, color 0.4s;
}

/* ===== Title Styling ===== */
h1 {
    text-align: center;
    margin-bottom: 25px;
    font-size: 28px;
    font-weight: bold;
    color: #ff5722;
    transition: color 0.4s;
}
body.dark h1 {
    color: #ffd54f;
}

/* ===== Labels ===== */
label {
    font-weight: bold;
    display: block;
    margin-top: 15px;
    font-size: 18px;
}

/* ===== Inputs & Select ===== */
input, select, button {
    width: 100%;
    padding: 14px;
    margin-top: 6px;
    border-radius: 10px;
    border: 1px solid #ccc;
    font-size: 18px;
    transition: 0.3s;
}

/* ===== Input Animation on Focus ===== */
input:focus, select:focus {
    outline: none;
    border-color: #4CAF50;
    box-shadow: 0 0 10px rgba(76, 175, 80, 0.6);
    transform: scale(1.02);
}

/* ===== Button Styles ===== */
button {
    background: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
    margin-top: 20px;
    font-weight: bold;
    font-size: 18px;
}
button:hover {
    background: #45a049;
    transform: scale(1.05);
}

/* ===== Result Box ===== */
.result {
    margin-top: 20px;
    font-size: 18px;
    color: #222;
    background: #f8f8f8;
    padding: 15px;
    border-radius: 10px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease-in-out;
}

/* ===== Animation ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}
.show {
    opacity: 1 !important;
    transform: translateY(0) !important;
}

/* ===== Dark Theme Styles ===== */
body.dark {
    background: linear-gradient(120deg, #232526, #414345);
    color: white;
}
body.dark .calculator {
    background: #2b2b2b;
    color: white;
}
body.dark input, body.dark select {
    background: #3a3a3a;
    color: white;
    border: 1px solid #555;
}
body.dark .result {
    background: #444;
    color: white;
}
body.dark .theme-toggle button {
    background: #f1f1f1;
    color: black;
}

/* ===== Responsive Design ===== */
@media screen and (max-width: 768px) {
    .calculator {
        padding: 20px;
    }
    h1 {
        font-size: 24px;
    }
    label, input, select, button {
        font-size: 16px;
    }
}

@media screen and (max-width: 480px) {
    body {
        padding: 10px;
    }
    .calculator {
        padding: 15px;
        border-radius: 15px;
    }
    h1 {
        font-size: 20px;
    }
    label, input, select, button {
        font-size: 14px;
    }
}