* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'poppins';
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

body {
    background: radial-gradient(125% 125% at 50% 10%,
    #ffffff 40%,
    #6633ee 100%
    );
    /* light mode style (JS ton toggle krange)*/
    /* background: radial-gradient(
        125% 125% at 50% 10%, 
        #ffffff 40%, 
        #6633ee 100%
    ); */
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    min-height: 90vh;
    width: 100%;
    max-width: 1280px;
    /* From https://css.glass */
    background: rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.20);
    padding: 2rem;
}

#header {
    text-align: center;
    margin-top: 0.3rem;
    margin-bottom: 2rem;
    padding: 1rem 0;
}

.header-title {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

#logo {
    font-size: 1.8rem;
    font-weight: 800;
    display: inline-block;
    padding: 0.6rem;
    margin-bottom: 0.4rem;
    border-radius: 0.75rem;
    background: rgba(255, 255, 255, 0.35);
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.12);
    color: #6633ee;
    margin-right: 1rem;
}

.balance-container {
    text-align: center;
    padding: 2rem;
    margin-bottom: 2.5rem;
    background: rgba(255, 255, 255, 0.18);
    border-radius: 16px;
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.12);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.28);
}

.balance-heading {
    color: #2d3748;
    margin-bottom: 1rem;
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

#current-balance {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: #1a202c;
}

.summary {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    padding: 1rem 0 0;
}

.income,
.expenses {
    background: rgba(255, 255, 255, 0.28);
    border-radius: 1rem;
    box-shadow: 0 6px 22px rgba(0, 0, 0, 0.12);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(255, 255, 255, 0.35);
    padding: 1.5rem;
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.income:hover,
.expenses:hover{
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.15);
}
.income h3,
.expenses h3{
    justify-self: flex-start;
    color: #08850a;
    font-size: 2rem;
    font-weight: 600;
}
.expenses h3{
    color: rgba(182, 45, 24, 0.856);
}
.icons-container{
    display: flex;
    justify-content: space-between;
    font-size: 1.8rem;
}

/* percentage pill styling (id duplicated in HTML; acceptable for now) */
.percentage{
    font-size: 0.9rem;
    padding: 0.2rem 0.5rem;
    border-radius: 999px;
    background: rgba(255,255,255,0.55);
    color: #1a202c;
    align-self: center;
}
#income-amount,
#expense-amount{
    text-align:start;
    font-size: 1.8rem;
}
.main-content{
    padding: 2rem;
    margin: 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.28);
}
.transaction-container{
    display: flex;
    /* border for debugging purpose */
    /* border: 1px solid darkgoldenrod; */
    height: 100%;
    width: 100%;
    justify-content: space-around;
    gap: 10px;
}
#transaction-list{
    list-style: none;
    max-height: 500px;
    overflow-y: auto;
    padding-right: 8px;
    flex-grow: 1;
}
/*Left @ 2:26:00 
    TODO : Add the transition styling and fix minor UI issues.
    Add JS
*/
#transaction-list::-webkit-scrollbar{
    width: 8px;
}

/* transaction list */
.transaction{
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 20%;
    padding: 1rem 1.2rem;
    margin-bottom: 6px;
    border-radius: 12px;
    animation: slideIn 0.6s ease-out;
    border-radius: 0.75rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.32);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 6px 18px rgba(0,0,0,0.08);
}
/* sliding animation on the transaction lists */
@keyframes slideIn {
    from{
        opacity: 0;
        transform: translateX(-20px);
    }
    to{
        opacity: 1;
        transform: translateX(0px);
    }
}
/* transaction list effects */
.transaction:hover{
    transform: translateX(4px);
    transition: all 0.15s ease-in;
}
/* .transaction-income li#income{
    border-right-color: #08850a;
} */
.transaction.income{
    border-left: 5px solid rgba(16, 185, 36, 0.8);

}
.transaction.expense{
    border-left: 5px solid rgba(182, 45, 24, 0.8);
}
.transaction .delete-btn{
    background: none;
    border: none;
    color: #dc2626;
    cursor: pointer;
    font-size: 1.1rem;
    opacity: 0;
    transition: all 0.2s ease;
    padding: 4px 8px;
    border-radius: 4px;
    margin-left: 12px;
}
.transaction:hover .delete-btn{
    opacity: 1;
}
.transaction .delete-btn:hover{
    background-color: #fee2e2;
    transform: scale(1.1);
}
/* bg of the scroll bar */
#transaction-list::-webkit-scrollbar-track{
    background-color: #f1f1f1;
    border-radius: 4px;
}
/* draggable part of the scroll bar */
#transaction-list::-webkit-scrollbar-thumb{
    background-color: #cbd5e0;
    border-radius: 4px;
}
#transaction-list::-webkit-scrollbar-thumb::hover{
    background-color: #a0aec0;
}

/* add transaction aala form */
.form-container{
    width: 50%;
    background: rgba(255,255,255,0.22);
    border: 1px solid rgba(255,255,255,0.32);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 6px 20px rgba(0,0,0,0.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    /* border for debugging purpose */
    /* border: 1px solid greenyellow; */
}

.form-container h2{
    margin-bottom: 0.75rem;
}

.form-group{
    display: flex;
    flex-direction: column;
    margin-bottom: 1rem;
}

.form-group label{
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: #2d3748;
}

#description,
#amount{
    width: 100%;
    padding: 0.8rem 0.9rem;
    border-radius: 0.6rem;
    border: 1px solid rgba(0,0,0,0.12);
    background: rgba(255,255,255,0.85);
    outline: none;
    transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

#description:focus,
#amount:focus{
    border-color: #6633ee;
    box-shadow: 0 0 0 4px rgba(102, 51, 238, 0.18);
}

#submit-btn{
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(45deg, #667eea, #764bb2);
    color: #fff;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    border-radius: 999px;
    padding: 0.85rem 1.25rem;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}

#submit-btn:hover{
    transform: translateY(-2px);
    box-shadow: 0 12px 22px rgba(79, 107, 232, 0.35);
}

#submit-btn:active{
    transform: translateY(0);
}

#submit-btn:focus{
    outline: 2px solid #764bb2;
    outline-offset: 3px;
}

/* responsive tweaks */
@media (max-width: 768px){
    .transaction-container{
        flex-direction: column;
        gap: 5px;
    }
    .form-container{
        width: 100%;
    }
    .summary{
        grid-template-columns: 1fr;
    }
    #current-balance{
        font-size: 2.25rem;
    }
}