:root {
    --bg-color: #f4f7f6;
    --text-color: #333;
    --card-bg: #ffffff;
    --primary-color: #4a90e2;
    --primary-hover: #357abd;
    --border-color: #e1e8ed;
    --error-color: #e74c3c;
    --success-color: #2ecc71;
    --input-bg: #f9f9f9;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --card-bg: #1e1e1e;
    --primary-color: #bb86fc;
    --primary-hover: #9c64e8;
    --border-color: #333;
    --input-bg: #2c2c2c;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 800px;
    margin: auto; /* Replaces body align-items center */
}

.dashboard-container {
    width: 100%;
    max-width: 1400px; /* Wider for full screen effect */
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
    align-items: stretch;
    margin: 40px auto; /* Centered with top margin */
}

.dashboard-container .nav {
    grid-column: 1 / -1;
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dashboard-container .card {
    margin-bottom: 0; /* Let grid gap handle spacing */
    height: 100%; /* Make cards in same row equal height */
}

/* Make tables span full width */
.dashboard-container .card.full-width {
    grid-column: 1 / -1;
}

@media (max-width: 768px) {
    .dashboard-container {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

[data-theme="dark"] .card {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

h2, h3 {
    margin-bottom: 20px;
    font-weight: 600;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-size: 0.9em;
    opacity: 0.8;
}

input[type="email"],
input[type="password"],
input[type="number"],
input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--input-bg);
    color: var(--text-color);
    outline: none;
    transition: border-color 0.3s ease;
}

input:focus {
    border-color: var(--primary-color);
}

button {
    width: 100%;
    padding: 12px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.3s ease;
}

button:hover {
    background: var(--primary-hover);
}

button.secondary {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    margin-top: 10px;
}

button.secondary:hover {
    background: rgba(74, 144, 226, 0.1);
}

.theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 10px 15px;
    border-radius: 20px;
    cursor: pointer;
    color: var(--text-color);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    width: auto;
}

.theme-toggle:hover {
    box-shadow: 0 6px 10px rgba(0,0,0,0.1);
}

.message {
    padding: 10px;
    border-radius: 6px;
    margin-bottom: 15px;
    display: none;
}

.message.error {
    background: rgba(231, 76, 60, 0.1);
    color: var(--error-color);
    display: block;
    border: 1px solid var(--error-color);
}

.message.success {
    background: rgba(46, 204, 113, 0.1);
    color: var(--success-color);
    display: block;
    border: 1px solid var(--success-color);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    opacity: 0.7;
    font-size: 0.9em;
}

.amount.positive {
    color: var(--success-color);
    font-weight: 600;
}

.amount.negative {
    color: var(--error-color);
    font-weight: 600;
}

.hidden {
    display: none !important;
}

.balance-display {
    font-size: 2.5em;
    font-weight: bold;
    color: var(--primary-color);
    margin: 10px 0 20px 0;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.nav a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    cursor: pointer;
}

.nav a:hover {
    text-decoration: underline;
}

/* Spinner for loading */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes fadeInSlideUp {
    from {
        opacity: 0;
        transform: translateY(15px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.card:not(.hidden) {
    animation: fadeInSlideUp 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transform: translateY(20px);
    transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.modal.show .modal-content {
    transform: translateY(0);
}

.modal-content h3 {
    margin-bottom: 15px;
    text-align: center;
}

.modal-content .details {
    background: var(--input-bg);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.9em;
}

.modal-content .details p {
    margin-bottom: 8px;
}

.modal-content .details span {
    font-weight: 600;
    float: right;
}

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