:root {
    --color-primary: #1e88e5; /* Blue for balances/actions */
    --color-positive: #2e7d32; /* Green for receipts/gains */
    --color-negative: #c62828; /* Red for returns/investments/alerts */
    --color-neutral: #f5f5f5; /* Light background */
    --color-text-dark: #333;
    --color-border: #ddd;
    --padding-base: 15px;
}

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

body {
    background-color: var(--color-neutral);
    color: var(--color-text-dark);
    padding-top: 60px; /* Space for fixed header */
    padding-bottom: 70px; /* Space for fixed footer */
}

/* --- HEADER STYLES --- */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--padding-base);
    background-color: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    z-index: 1000;
}

header h1 {
    font-size: 1.2em;
    font-weight: 600;
    color: var(--color-primary);
}

header nav button {
    background: none;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
    font-size: 0.9em;
    color: var(--color-text-dark);
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

header nav button:hover {
    color: var(--color-primary);
}

header nav button.active {
    color: var(--color-primary);
    border-bottom: 2px solid var(--color-primary);
    font-weight: 600;
}

.header-actions button {
    margin-left: 10px;
}

/* --- BUTTON STYLES --- */
button {
    padding: 8px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.2s;
}

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

.btn-primary:hover {
    background-color: #1565c0;
}

.btn-secondary {
    background-color: #9e9e9e;
    color: white;
}

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

/* --- MAIN CONTENT LAYOUT --- */
main {
    padding: var(--padding-base);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--padding-base);
    margin-bottom: var(--padding-base);
}

.card {
    background-color: white;
    padding: var(--padding-base);
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.card h3 {
    font-size: 1em;
    color: #757575;
    margin-bottom: 5px;
}

.card .amount {
    font-size: 1.8em;
    font-weight: 700;
}

.amount.balance { color: var(--color-primary); }
.amount.positive { color: var(--color-positive); }
.amount.negative { color: var(--color-negative); }

/* --- PEOPLE/INVESTMENT LISTS --- */
.list-container {
    display: grid;
    gap: 10px;
}

.list-item {
    background-color: white;
    padding: var(--padding-base);
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 5px solid var(--color-primary);
}

.list-item-content h4 {
    margin-bottom: 4px;
    font-size: 1.1em;
}

.list-item-actions button {
    margin-left: 5px;
    padding: 5px 10px;
}

.transaction-log {
    list-style: none;
    padding: 0;
}

.log-item {
    padding: 10px 0;
    border-bottom: 1px dashed var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9em;
}

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

.log-amount.Receipt { color: var(--color-positive); }
.log-amount.Return { color: var(--color-negative); }
.log-amount.Investment { color: var(--color-negative); }
.log-amount.Give { color: var(--color-negative); }
.log-amount.Recovery { color: var(--color-positive); }

.log-item-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.btn-edit-tx, .btn-delete-tx {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1em;
    padding: 2px 5px;
    opacity: 0.6;
}
.btn-edit-tx:hover, .btn-delete-tx:hover { opacity: 1; }
/* --- FOOTER STYLES --- */
#dashboard-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: #333;
    color: white;
    z-index: 900;
    box-shadow: 0 -2px 5px rgba(0, 0, 0, 0.2);
}

.footer-summary {
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 10px var(--padding-base);
}

.footer-summary > div {
    text-align: center;
}

.footer-summary span {
    display: block;
    font-size: 0.8em;
}

.footer-summary .amount {
    font-size: 1.2em;
    font-weight: 600;
}

#footer-toggle {
    background: none;
    border: 1px solid white;
    color: white;
    font-size: 0.7em;
    padding: 5px 8px;
}

#footer-details {
    padding: var(--padding-base);
    background-color: #222;
}

.alert-message {
    padding: 10px;
    margin-top: 10px;
    border-radius: 4px;
    font-weight: 600;
    background-color: #ffcdd2;
    color: var(--color-negative);
    border: 1px solid var(--color-negative);
    text-align: center;
}

/* --- MODAL STYLES --- */
.modal {
    display: none; /* Hidden by default */
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
    padding-top: 60px;
}

.modal-content {
    background-color: #fefefe;
    margin: 5% auto; /* 5% from the top and centered */
    padding: 20px;
    border-radius: 8px;
    width: 90%; 
    max-width: 600px;
    position: relative;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.close-btn {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

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

form label {
    display: block;
    margin: 10px 0 5px;
    font-weight: 500;
}

form input[type="text"],
form input[type="number"],
form input[type="date"],
form select {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
}

.form-tabs {
    display: flex;
    margin-bottom: 15px;
}

.form-tabs input[type="radio"] {
    display: none;
}

.form-tabs label {
    flex-grow: 1;
    text-align: center;
    padding: 10px;
    border: 1px solid var(--color-border);
    background-color: var(--color-neutral);
    cursor: pointer;
    font-weight: normal;
    transition: background-color 0.2s;
}

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

.small-note {
    font-size: 0.8em;
    color: #757575;
    margin-bottom: 10px;
}

.allocation-summary {
    background-color: var(--color-neutral);
    padding: 10px;
    border-radius: 4px;
    margin: 15px 0;
    font-weight: 500;
}
.chart-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    align-items: start;
}
.chart-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}
.chart-grid > div {
    /* This helps Chart.js calculate its size correctly and prevents collapsing */
    position: relative;
    /* Use a fixed height to give Chart.js a stable container to draw in. */
    height: 300px; 
}

/* --- RESPONSIVENESS --- */
@media (max-width: 600px) {
    :root {
        --padding-base: 10px; /* Reduce base padding for mobile */
    }

    header {
        flex-direction: column;
        height: auto;
        padding: 10px var(--padding-base);
        align-items: center; /* Changed back to center for better alignment */
    }
    header h1 {
        font-size: 1.1em;
        text-align: center;
        order: -1; /* Ensure h1 appears first */
        margin-bottom: 10px; /* Space below title */
        z-index: 1; /* Ensure h1 is above other elements */
    }
    header nav {
        display: flex;
        justify-content: center;
        width: 100%;
        flex-wrap: wrap; /* Allow nav buttons to wrap if needed */
        order: 0; /* Navigation comes after h1 */
    }
    header nav button {
        padding: 8px 10px; /* Smaller padding for buttons */
        font-size: 0.85em;
    }
    .header-actions {
        display: flex; /* Show header actions on mobile */
        justify-content: center; /* Center buttons */
        flex-wrap: wrap; /* Allow buttons to wrap if needed */
        gap: 10px; /* Space between buttons */
        margin-top: 10px;
        order: 1; /* Actions come after navigation */
        width: 100%; /* Full width for better spacing */
    }
    .header-actions button {
        margin-left: 0; /* Remove left margin for mobile */
        padding: 8px 12px; /* Slightly smaller padding for touch targets */
        font-size: 0.9em; /* Slightly smaller text */
        flex: 1; /* Allow buttons to grow */
        min-width: 120px; /* Ensure buttons are wide enough */
        text-align: center;
    }
    body {
        padding-top: 160px; /* Increased to account for taller header */
        padding-bottom: 100px; /* Increase bottom padding for footer on mobile */
        font-size: 0.95em; /* Slightly smaller base font */
    }
    main {
        padding: var(--padding-base);
    }
    .card-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); /* Smaller min width for cards */
        gap: 10px;
    }
    .card .amount {
        font-size: 1.5em; /* Reduce large amounts */
    }
    .list-item {
        flex-direction: column; /* Stack list item content for mobile */
        align-items: flex-start;
    }
    .list-item-actions {
        margin-top: 10px;
        width: 100%;
        justify-content: flex-end;
    }
    .log-item {
        flex-direction: column; /* Stack log items */
        align-items: flex-start;
        gap: 5px;
    }
    .log-item-actions {
        width: 100%;
        justify-content: flex-end;
    }
    .footer-summary {
        flex-wrap: wrap;
        padding: 8px var(--padding-base);
    }
    .footer-summary > div {
        flex-basis: 45%;
        margin: 5px 0;
        font-size: 0.9em;
    }
    .footer-summary .amount {
        font-size: 1.1em;
    }
    #footer-toggle {
        flex-basis: 100%;
        margin-top: 10px;
    }
    .modal-content {
        margin: 10% auto; /* More top margin for mobile */
        padding: 15px;
    }
    button {
        padding: 10px 15px; /* Larger touch targets */
    }
    .list-item-actions button,
    .btn-edit-tx,
    .btn-delete-tx {
        padding: 8px 12px; /* Larger for touch */
    }
    .form-tabs label {
        padding: 8px;
        font-size: 0.9em;
    }
    .chart-grid {
        grid-template-columns: 1fr; /* Stack charts on mobile */
        gap: 30px;
    }
    .chart-grid > div {
        height: 280px; /* Adjust height for mobile view */
    }
}