:root {
    /* Palette: Elegant & Soft */
    --primary-color: #bfa094; /* Dusty Rose/Taupe */
    --primary-dark: #a08075;
    --secondary-color: #f3e9e4; /* Pale Blush */
    --accent-color: #8a9a5b; /* Sage Green (for success/active) */
    --bg-color: #f9f7f6; /* Off-white warm */
    --card-bg: #ffffff;
    --text-main: #4a4a4a;
    --text-light: #888888;
    --border-color: #e0d8d6;
    
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.1);
    
    --font-heading: 'Cormorant Garamond', serif;
    --font-body: 'Lato', sans-serif;
    
    --radius-lg: 16px;
    --radius-sm: 8px;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    padding-bottom: 80px;
}

/* Header */
header {
    background-color: var(--card-bg);
    padding: 2.5rem 1rem 1rem; /* Reduced bottom padding */
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

h1 {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 600;
    color: var(--text-main);
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-style: italic;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

/* Navigation */
.main-nav {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.nav-btn {
    background: transparent;
    border: none;
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--text-light);
    cursor: pointer;
    padding: 0.5rem 1.5rem;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.nav-btn:hover {
    color: var(--primary-color);
}

.nav-btn.active {
    color: var(--text-main);
    border-bottom-color: var(--primary-color);
    font-weight: 600;
}

.date-setter-container {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 1.5rem;
    flex-wrap: wrap;
    padding-top: 1rem;
    border-top: 1px solid #fafafa;
}

.input-group {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
}

.input-group label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-light);
    font-weight: 700;
}

.arrow-divider {
    font-size: 1.5rem;
    color: var(--border-color);
    padding-bottom: 0.5rem;
}

input[type="date"] {
    padding: 0.6rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--text-main);
    background: #fff;
    transition: all 0.2s;
    min-width: 160px;
}

input[type="date"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--secondary-color);
}

input[type="date"]:disabled {
    background-color: #f5f5f5;
    color: #ccc;
    cursor: not-allowed;
}

/* Recommend Button */
.recommend-btn {
    padding: 0.6rem 1.2rem;
    background-color: var(--secondary-color);
    color: var(--primary-dark);
    border: 1px solid var(--primary-color);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 2px;
}

.recommend-btn:hover {
    background-color: #efe5df;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.sparkle-icon {
    font-size: 1.1rem;
}

/* Views */
.view-container {
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Layout - Timeline */
#timeline-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
    padding: 0 2rem;
    max-width: 1600px;
    margin: 0 auto;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem;
    color: var(--text-light);
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    border: 1px dashed var(--border-color);
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

/* Month Card */
.month-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    height: 500px;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    overflow: hidden;
    border: 1px solid transparent;
}

.month-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.month-card.is-past {
    opacity: 0.8;
    background-color: #fafafa;
}

.month-card.collapsed {
    height: 70px;
    opacity: 0.7;
    box-shadow: none;
    border-color: var(--border-color);
}

.month-card.collapsed:hover {
    opacity: 1;
    box-shadow: var(--shadow-sm);
    transform: translateY(0);
}

.month-header {
    padding: 1rem 1.25rem;
    background-color: #fff;
    border-bottom: 1px solid var(--secondary-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    height: 70px;
    flex-shrink: 0;
}

.month-card.is-past .month-header {
    background-color: #f4f4f4;
}

.month-title-group {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.month-name {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--text-main);
}

.year-label {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 600;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.task-count-badge {
    font-size: 0.75rem;
    color: var(--text-light);
    background: var(--secondary-color);
    padding: 2px 8px;
    border-radius: 10px;
    opacity: 0;
    transition: opacity 0.2s;
}

.month-card.collapsed .task-count-badge {
    opacity: 1;
}

.toggle-btn {
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s;
}

.month-card.collapsed .toggle-btn {
    transform: rotate(180deg);
}

.collapsible-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.task-list {
    flex-grow: 1;
    padding: 1rem;
    overflow-y: auto;
    background-color: #fff;
}

.task-list.drag-over {
    background-color: rgba(138, 154, 91, 0.1);
    border: 2px dashed var(--accent-color);
}

.task-item {
    background: white;
    padding: 0.8rem 1rem;
    margin-bottom: 0.8rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 2px rgba(0,0,0,0.02);
    display: flex;
    align-items: flex-start;
    gap: 10px;
    transition: all 0.2s;
    position: relative;
}

.task-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.task-item.dragging {
    opacity: 0.5;
    background: var(--secondary-color);
    border: 1px dashed var(--primary-color);
}

.drag-handle {
    color: #ddd;
    cursor: grab;
    font-size: 1.2rem;
    line-height: 1.2;
    padding-top: 2px;
}

.task-checkbox {
    margin-top: 5px;
    cursor: pointer;
    width: 18px;
    height: 18px;
    accent-color: var(--accent-color);
    border-radius: 4px;
}

.task-content {
    flex-grow: 1;
    word-break: break-word;
    font-size: 0.95rem;
    padding: 2px 4px;
    border-radius: 4px;
    line-height: 1.5;
    outline: none;
}

.task-content:focus {
    background-color: #fffbef;
}

.task-item.completed .task-content {
    text-decoration: line-through;
    color: #aaa;
}

.task-item.completed {
    background-color: #fafafa;
    border-color: #eee;
}

.delete-btn {
    background: none;
    border: none;
    color: #e57373;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s;
    padding: 2px;
}

.task-item:hover .delete-btn {
    opacity: 1;
}

.add-task-container {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    background: #fff;
}

.add-btn {
    width: 100%;
    padding: 0.8rem;
    background-color: #fff;
    border: 1px dashed var(--primary-color);
    color: var(--primary-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-body);
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.add-btn:hover {
    background-color: var(--secondary-color);
    color: var(--primary-dark);
}

.task-list::-webkit-scrollbar {
    width: 5px;
}

.task-list::-webkit-scrollbar-track {
    background: transparent;
}

.task-list::-webkit-scrollbar-thumb {
    background: #e0d8d6;
    border-radius: 3px;
}

/* --- Expenses View Styles --- */

#expenses-view {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1rem;
}

.expenses-summary {
    margin-bottom: 2rem;
    text-align: center;
}

.summary-card {
    background: var(--text-main);
    color: #fff;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    display: inline-block;
    min-width: 300px;
}

.summary-card h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.total-amount {
    font-size: 2.5rem;
    font-weight: 700;
    font-family: var(--font-heading);
    color: var(--secondary-color);
}

.card {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.add-expense-form h3 {
    margin-bottom: 1rem;
    font-family: var(--font-heading);
    color: var(--primary-dark);
}

.form-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.form-row input {
    flex: 1;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    min-width: 200px;
}

.form-row input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-row .full-width {
    flex: 3;
}

.add-btn-primary {
    padding: 0.8rem 2rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
}

.add-btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

/* Expenses Table Styles */
.table-container {
    overflow-x: auto;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.expenses-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px; /* Ensure readability on mobile */
}

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

.expenses-table th {
    background-color: var(--secondary-color);
    font-weight: 600;
    color: var(--primary-dark);
    font-size: 0.95rem;
    text-transform: uppercase;
}

.expenses-table tr:last-child td {
    border-bottom: none;
}

.expenses-table tr:hover {
    background-color: #fafafa;
}

/* Editable Cells */
.editable-cell {
    cursor: text;
    transition: background 0.2s;
    outline: none;
    border-radius: 4px;
    padding: 8px; /* Hit area */
}

.editable-cell:hover {
    background-color: #f0f0f0;
}

.editable-cell:focus {
    background-color: #fffbef;
    box-shadow: inset 0 0 0 2px var(--primary-color);
}

.cell-cost {
    font-family: var(--font-body);
    font-weight: 600;
    color: var(--text-main);
}

.cell-category {
    font-size: 0.9rem;
    color: var(--text-light);
    background-color: #f5f5f5;
    padding: 2px 6px;
    border-radius: 4px;
    display: inline-block;
}

.cell-note {
    color: var(--text-light);
    font-size: 0.9rem;
}

.action-cell {
    text-align: center;
}

.delete-icon-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: #e57373;
    font-size: 1.2rem;
    padding: 4px;
    border-radius: 50%;
    transition: background 0.2s;
}

.delete-icon-btn:hover {
    background-color: #ffebee;
}

/* Adjust Form Layout for Table Alignment */
.add-expense-form .form-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

@media (max-width: 600px) {
    .table-container {
        border-radius: var(--radius-sm);
    }
    
    .expenses-table th, 
    .expenses-table td {
        padding: 0.8rem 0.5rem;
        font-size: 0.9rem;
    }
    
    .add-expense-form .form-row {
        flex-direction: column;
        align-items: stretch;
    }
}