/* Base Styles and Variables */
:root {
    --primary-green: #1AB76C;
    --primary-orange: #FF9933;
    --secondary-teal: #20B2AA;
    --text-color: #333;
    --expense-red: #FF5252;
    --white: #FFF;
    --light-gray: #F5F5F5;
    --medium-gray: #E0E0E0;
    --dark-gray: #757575;
    --gradient: linear-gradient(to right, #1AB76C, #20B2AA);
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
}

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

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text-color);
    background-color: var(--light-gray);
    line-height: 1.6;
}

.app-container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0;
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--white);
}

/* Header and Logo Styles */
header {
    padding: 15px;
    background-color: var(--white);
    box-shadow: var(--shadow);
}

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

.logo h1 {
    font-family: 'Dancing Script', cursive;
    font-size: 28px;
    color: var(--text-color);
}

/* Budget Overview Section */
.budget-overview {
    padding: 15px;
}

.budget-card {
    background: var(--gradient);
    border-radius: var(--border-radius);
    padding: 20px;
    color: var(--white);
    display: flex;
    justify-content: space-between;
    box-shadow: var(--shadow);
}

.budget-info {
    flex: 1;
}

.budget-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 5px;
}

.budget-label {
    font-size: 18px;
    font-weight: 500;
}

.edit-budget-icon {
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.edit-budget-icon:hover {
    opacity: 1;
}

.budget-amount {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 15px;
}

.expense-container {
    display: flex;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.2);
    padding: 10px;
    border-radius: 8px;
}

.expense-icon {
    margin-right: 10px;
}

.expense-label {
    margin-right: 10px;
}

.expense-amount {
    font-weight: 600;
    color: var(--expense-red);
}

.budget-illustration {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Expense Detail Section */
.expense-detail {
    flex: 1;
    padding: 15px;
}

.detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.month-selector {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-color);
}

.expenses-list {
    margin-top: 10px;
}

.expense-date-header {
    font-weight: 500;
    margin: 15px 0 10px;
    color: var(--text-color);
}

.expense-item {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--medium-gray);
}

.expense-icon-container {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--light-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    font-size: 20px;
}

.expense-details {
    flex: 1;
}

.expense-title {
    font-weight: 600;
    font-size: 16px;
}

.expense-value {
    color: var(--text-color);
    font-weight: 500;
}

.expense-time {
    font-size: 14px;
    color: var(--dark-gray);
    text-align: right;
}

.date-divider {
    height: 1px;
    background-color: var(--medium-gray);
    margin: 15px 0;
}

/* Footer Navigation */
.app-footer {
    display: flex;
    justify-content: space-around;
    padding: 15px 10px;
    background: var(--gradient);
    color: var(--white);
    position: sticky;
    bottom: 0;
    width: 100%;
    border-radius: 12px 12px 0 0;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.nav-item i {
    font-size: 22px;
    margin-bottom: 3px;
}

.nav-item span {
    font-size: 12px;
}

.nav-item.active, 
.nav-item:hover {
    opacity: 1;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    overflow: auto;
}

.modal-content {
    background-color: var(--white);
    margin: 15% auto;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    width: 90%;
    max-width: 500px;
    position: relative;
}

.close-button {
    position: absolute;
    right: 15px;
    top: 10px;
    font-size: 24px;
    cursor: pointer;
    color: var(--dark-gray);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--medium-gray);
    border-radius: 8px;
    font-size: 16px;
}

.icon-selection {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-top: 10px;
}

.icon-option {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--medium-gray);
    border-radius: 8px;
    cursor: pointer;
    font-size: 20px;
}

.icon-option.selected {
    border-color: var(--primary-green);
    background-color: rgba(26, 183, 108, 0.1);
}

.submit-button {
    width: 100%;
    padding: 12px;
    background: var(--gradient);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.2s;
}

.submit-button:hover {
    opacity: 0.9;
}

/* Month Selector Modal */
.month-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin: 15px 0;
}

.month-item {
    padding: 10px;
    text-align: center;
    border: 1px solid var(--medium-gray);
    border-radius: 8px;
    cursor: pointer;
}

.month-item.selected {
    background-color: var(--primary-green);
    color: var(--white);
    border-color: var(--primary-green);
}

.year-selector {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 15px;
}

.year-selector button {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: var(--text-color);
    padding: 5px 10px;
}

.year-selector span {
    margin: 0 15px;
    font-weight: 500;
}

/* Edit/Delete Expense Styles */
.expense-item {
    position: relative;
    cursor: pointer;
    transition: background-color 0.2s;
}

.expense-item:hover {
    background-color: var(--light-gray);
}

.form-actions {
    display: flex;
    gap: 10px;
}

.delete-button {
    padding: 12px;
    background: linear-gradient(to right, #ff5252, #ff7675);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.2s;
    flex: 1;
}

.delete-button:hover {
    opacity: 0.9;
}

/* History Modal Styles */
.history-container {
    margin-top: 15px;
}

.history-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
    max-height: 150px;
    overflow-y: auto;
}

.history-tab {
    padding: 8px 12px;
    background-color: var(--light-gray);
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    white-space: nowrap;
}

.history-tab.active {
    background: var(--gradient);
    color: var(--white);
}

.history-summary {
    display: flex;
    justify-content: space-between;
    padding: 15px;
    background-color: var(--light-gray);
    border-radius: 10px;
    margin-bottom: 15px;
}

.summary-label {
    font-weight: 500;
    margin-bottom: 5px;
}

.summary-value {
    font-size: 18px;
    font-weight: 600;
}

.history-expenses .summary-value {
    color: var(--expense-red);
}

/* Empty State */
.empty-state {
    padding: 20px;
    text-align: center;
    color: var(--dark-gray);
}

/* Responsive Design */
@media (min-width: 768px) {
    .app-container {
        max-width: 500px;
        border-left: 1px solid var(--medium-gray);
        border-right: 1px solid var(--medium-gray);
    }
    
    .modal-content {
        width: 400px;
    }
}