@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

:root {
    --bg-color: #F4F7FC;
    --component-bg: #FFFFFF;
    --primary-color: #007BFF;
    --accent-color: #FFD700;
    --text-color: #333333;
    --text-light: #000000;
    --danger-color: #DC3545;
    --income-color: #28A745;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --glow-color-primary: rgba(0, 123, 255, 0.5);
    --glow-color-danger: rgba(220, 53, 69, 0.5);
    --border-color: #DEE2E6;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    min-height: 100vh;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%239C92AC' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.container {
    display: flex;
    width: 100%;
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px;
    gap: 20px;
}

.left,
.right {
    background-color: var(--component-bg);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px var(--shadow-color);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.left {
    width: 35%;
    display: flex;
    flex-direction: column;
}

.right {
    width: 65%;
    font-variant-numeric: tabular-nums;
}

.left:hover,
.right:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px var(--shadow-color);
}

h1, h2, h3 {
    color: var(--text-light);
    margin-bottom: 20px;
    text-align: center;
    font-weight: 600;
}

h2 {
    font-size: 2em;
}

h3 {
    font-size: 1.5em;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
    margin-top: 20px;
}

.input-section {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 10px;
    font-size: 1.1em;
    color: var(--text-color);
    font-weight: 300;
}

input[type="date"],
input[type="number"] {
    width: 100%;
    padding: 12px;
    font-size: 1em;
    background-color: #F8F9FA;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    transition: border-color 0.3s, box-shadow 0.3s;
}

input[type="date"]:focus,
input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 15px var(--glow-color-primary);
    background-color: var(--component-bg);
}

button, .btn {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    font-size: 1.1em;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #fff;
}

.income-btn {
    background: linear-gradient(45deg, var(--income-color), #34c759);
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.4);
}

.income-btn:hover {
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.6);
    transform: translateY(-3px);
}

.expense-btn {
    background: linear-gradient(45deg, var(--danger-color), #ff4d4f);
    box-shadow: 0 4px 15px rgba(220, 53, 69, 0.4);
}

.expense-btn:hover {
    box-shadow: 0 6px 20px var(--glow-color-danger);
    transform: translateY(-3px);
}

#monthList .month,
#monthList .yearly-total {
    display: grid;
    grid-template-columns: 1fr 2fr 2fr 2fr;
    gap: 15px;
    align-items: center;
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
    font-size: 1.1em;
    transition: background-color 0.3s, transform 0.2s;
}

#monthList .month {
    cursor: pointer;
}

#monthList .month:hover {
    background-color: #f8f9fa;
    transform: scale(1.02);
    border-radius: 8px;
}

#monthList .month span:first-child,
#monthList .yearly-total span:first-child {
    font-weight: 700;
    color: var(--text-light);
    font-size: 1.2em;
}

.income-text {
    color: var(--income-color);
    font-weight: 600;
}

.expense-text {
    color: var(--danger-color);
    font-weight: 600;
}

.total-text {
    font-weight: 700;
    text-align: right;
}

#monthList .yearly-total {
    margin-top: 20px;
    border-top: 3px solid var(--primary-color);
    font-size: 1.3em;
    font-weight: bold;
    background-color: rgba(0, 123, 255, 0.1);
    border-radius: 8px;
    border-bottom: none;
}

.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--component-bg);
    margin: 5% auto;
    padding: 40px;
    border: none;
    border-radius: 20px;
    width: 90%;
    max-width: 800px;
    box-shadow: 0 20px 50px var(--shadow-color);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.modal-header h3 {
    font-size: 2.2em;
    margin: 0;
    border: none;
}

.close {
    color: #6C757D;
    font-size: 40px;
    font-weight: bold;
    transition: color 0.3s;
}

.close:hover,
.close:focus {
    color: var(--primary-color);
    text-decoration: none;
    cursor: pointer;
}

.detail-item {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.detail-item:last-child {
    border-bottom: none;
}

.detail-header {
    font-weight: 700;
    color: var(--primary-color);
    font-size: 1.1em;
    text-transform: uppercase;
}

.clickable-amount {
    cursor: pointer;
    text-decoration: none;
    transition: color 0.3s;
}

.clickable-amount:hover {
    color: var(--accent-color);
    text-shadow: 0 0 10px var(--accent-color);
}

.detail-item .btn {
    padding: 8px 12px;
    font-size: 0.9em;
    width: auto;
    margin: 0;
}

.modal-header-controls {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
    margin-bottom: 20px;
}

.back-btn {
    background: none;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    width: auto;
    padding: 8px 16px;
}

.back-btn:hover {
    background: var(--primary-color);
    color: #fff;
    box-shadow: 0 0 15px var(--glow-color-primary);
}

@media (max-width: 1200px) {
    .container {
        flex-direction: column;
    }
    .left, .right {
        width: 100%;
    }
}

@media (max-width: 768px) {
    body { font-size: 14px; }
    .modal-content { padding: 20px; }
    .modal-header h3 { font-size: 1.8em; }

    #monthList .month, 
    #monthList .yearly-total {
        grid-template-columns: 1fr 1fr;
        row-gap: 10px;
        padding: 20px;
    }

    #monthList .month span:first-child,
    #monthList .yearly-total span:first-child {
        grid-column: 1 / -1;
        text-align: center;
        font-size: 1.5em;
        margin-bottom: 10px;
    }

    .total-text {
        grid-column: 1 / -1;
        text-align: center;
        margin-top: 10px;
        font-size: 1.2em;
        padding-top: 10px;
        border-top: 1px solid var(--border-color);
    }

    .detail-item {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }

    .detail-item span:nth-child(3),
    .detail-item span:nth-child(4) {
        text-align: right;
    }
}