:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --danger-color: #e74c3c;
    --danger-hover-color: #c0392b;
    --background-color: #f4f6f9;
    --card-background: #ffffff;
    --text-color: #333333;
    --light-text-color: #777777;
    --border-color: #e0e0e0;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --font-family: 'Poppins', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: 1.25rem 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn-export {
    background-color: transparent;
    color: white;
    border: 1px solid white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    font-family: var(--font-family);
    font-size: 0.9rem;
    font-weight: 600;
    transition: background-color 0.2s, color 0.2s;
}

.btn-export:hover {
    background-color: white;
    color: var(--primary-color);
}

main {
    padding: 1rem;
    max-width: 800px;
    margin: 0 auto;
}

section {
    margin-bottom: 1.5rem;
}

h2 {
    margin-bottom: 0.75rem;
    color: var(--primary-color);
    font-size: 1.25rem;
}

.overview-card {
    background-color: var(--card-background);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
}

.overview-card h2 {
    font-size: 1rem;
    font-weight: 400;
    color: var(--light-text-color);
    margin: 0;
}

#total-expenses {
    font-size: 3rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin: 0.5rem 0 0 0;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
}

.category-item {
    background-color: var(--card-background);
    padding: 1rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.category-item .name {
    font-weight: 600;
    font-size: 1rem;
    word-break: break-word;
}

.category-item .amount {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-top: 0.25rem;
}

.recent-transactions ul {
    list-style-type: none;
    background-color: var(--card-background);
    border-radius: 8px;
    padding: 0;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.recent-transactions li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    gap: 1rem;
}

.recent-transactions li:last-child {
    border-bottom: none;
}

.transaction-info {
    flex-grow: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.transaction-details {
    display: flex;
    flex-direction: column;
}

.transaction-category {
    font-weight: 600;
}

.transaction-note {
    font-size: 0.85rem;
    color: var(--light-text-color);
    word-break: break-word;
}

.transaction-amount {
    font-weight: 700;
    font-size: 1.1rem;
    white-space: nowrap;
}

.transaction-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    margin-left: 1rem;
    text-align: right;
}

.transaction-date {
    font-size: 0.85rem;
    color: var(--light-text-color);
}

.transaction-actions {
    display: flex;
    gap: 0.5rem;
}

.transaction-actions button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    padding: 0.25rem;
    border-radius: 4px;
    line-height: 1;
    transition: background-color 0.2s, color 0.2s;
}

.transaction-actions button:hover {
    background-color: var(--border-color);
}

.transaction-actions .btn-delete:hover {
    background-color: #ffdddd;
    color: #c0392b;
}

.fab {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    font-size: 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 6px 10px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: transform 0.2s ease-in-out, background-color 0.2s;
    z-index: 999;
}

.fab:hover {
    transform: scale(1.05);
    background-color: #27ae60;
}

.modal-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-container:not([hidden]) {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background-color: var(--card-background);
    padding: 2rem;
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    transform: scale(0.95);
    transition: transform 0.3s ease;
}

#confirm-modal .modal-content {
    max-width: 400px;
}

#confirm-text {
    margin: 1rem 0 1.5rem 0;
    font-size: 1.1rem;
    text-align: center;
}


.modal-container:not([hidden]) .modal-content {
    transform: scale(1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-group input[type="text"],
.form-group input[type="number"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-family);
}

.category-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.category-selector input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.category-selector label {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
    font-weight: 400;
}

.category-selector input[type="radio"]:checked + label {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.category-selector input[type="radio"]:focus-visible + label {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1.5rem;
}

.form-actions button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.form-actions button:active {
    transform: translateY(1px);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}
.btn-primary:hover {
    background-color: #2980b9;
}

.btn-secondary {
    background-color: var(--border-color);
    color: var(--text-color);
}
.btn-secondary:hover {
    background-color: #d0d0d0;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}
.btn-danger:hover {
    background-color: var(--danger-hover-color);
}

.no-transactions {
    text-align: center;
    color: var(--light-text-color);
    padding: 2rem 1rem;
    border: none;
}