/* --- Minimalist Personal Ledger Stylesheet (Human-Crafted Utility Aesthetic) --- */

:root {
    --bg-base: #09090b; /* Zinc 950 */
    --bg-sidebar: #09090b;
    --bg-card: #18181b; /* Zinc 900 */
    --bg-input: #09090b;
    
    --border-color: #27272a; /* Zinc 800 */
    --border-color-hover: #3f3f46; /* Zinc 700 */
    
    --color-primary: #ffffff;
    --color-primary-hover: #f4f4f5; /* Zinc 100 */
    --color-primary-text: #09090b;
    
    --color-secondary: #18181b;
    --color-secondary-hover: #27272a;
    
    --color-success: #10b981; /* Emerald 500 */
    --color-danger: #ef4444; /* Red 500 */
    --color-warning: #f59e0b; /* Amber 500 */
    --color-info: #0ea5e9; /* Sky 500 */
    
    --text-primary: #fafafa; /* Zinc 50 */
    --text-secondary: #a1a1aa; /* Zinc 400 */
    --text-muted: #71717a; /* Zinc 500 */
    --text-disabled: #52525b; /* Zinc 600 */
    
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-full: 9999px;
    
    --transition-fast: 0.12s ease;
    --transition-normal: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base resets */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

/* App Container Layout */
.app-container {
    display: grid;
    grid-template-columns: 240px 1fr;
    min-height: 100vh;
}

/* Sidebar Styling */
.sidebar {
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.25rem;
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: sticky;
    top: 0;
    z-index: 10;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 2.5rem;
    padding-left: 0.5rem;
}

.brand-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
}

.brand h2 {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.2px;
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    flex-grow: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.nav-item i {
    width: 16px;
    height: 16px;
    color: var(--text-muted);
}

.nav-item:hover {
    color: var(--text-primary);
    background-color: var(--bg-card);
}

.nav-item.active {
    color: var(--text-primary);
    background-color: var(--bg-card);
    font-weight: 600;
    border: 1px solid var(--border-color);
}

.nav-item.active i {
    color: var(--text-primary);
}

.sidebar-footer {
    border-top: 1px solid var(--border-color);
    padding-top: 1.25rem;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding-left: 0.4rem;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background-color: var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    border: 1px solid var(--border-color-hover);
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.user-status {
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* Main Content Area */
.main-content {
    padding: 2.5rem 3rem;
    overflow-y: auto;
    height: 100vh;
}

/* Header styling */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
}

.header-title h1 {
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: -0.4px;
    margin-bottom: 0.15rem;
    color: var(--text-primary);
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.85rem;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.85rem;
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition-fast);
    font-family: var(--font-sans);
}

.btn i {
    width: 14px;
    height: 14px;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-primary-text);
    border: 1px solid var(--color-primary);
}

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

.btn-secondary {
    background-color: var(--bg-card);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--bg-base);
    border-color: var(--border-color-hover);
}

.btn-danger {
    background-color: transparent;
    border-color: var(--border-color);
    color: var(--color-danger);
}

.btn-danger:hover {
    background-color: rgba(239, 68, 68, 0.08);
    border-color: var(--color-danger);
}

.btn-block {
    width: 100%;
}

.flex-1 {
    flex: 1;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

/* KPI Cards */
.kpi-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.5rem;
    position: relative;
    overflow: hidden;
}

.kpi-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.kpi-icon {
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
}

.kpi-icon i {
    width: 14px;
    height: 14px;
}

.kpi-body {
    margin-bottom: 1rem;
}

.kpi-main-val {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.3px;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.kpi-sub-val {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.1rem;
}

/* Progress bar in KPI */
.progress-bar-container {
    height: 3px;
    background-color: var(--border-color);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background-color: var(--text-primary);
    border-radius: var(--radius-full);
    transition: width 0.4s ease;
}

.progress-bar-fill.spent-fill {
    background-color: var(--color-warning);
}

.progress-bar-fill.remaining-fill {
    background-color: var(--color-success);
}

/* Layout Columns */
.grid-col-left {
    grid-column: span 2;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.grid-col-right {
    grid-column: span 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Card */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.card-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-body {
    padding: 1.25rem;
}

.card-body.no-padding {
    padding: 0;
}

.scrollable-y {
    max-height: 420px;
    overflow-y: auto;
}

/* Form Styles */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group select {
    width: 100%;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.5rem 0.75rem;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--color-primary-hover);
}

.form-row {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 0.75rem;
}

.input-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
    height: 0.85rem;
    font-style: italic;
}

/* Chart Styles */
.chart-toggle {
    display: flex;
    background-color: var(--bg-base);
    padding: 2px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.chart-tab {
    background: transparent;
    border: none;
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    font-family: var(--font-sans);
    transition: var(--transition-fast);
}

.chart-tab.active {
    background-color: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.chart-container-wrapper {
    height: 240px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 1.25rem;
}

.chart-canvas-container {
    width: 100%;
    height: 100%;
    position: relative;
}

/* Transactions list filters */
.list-filters {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 0.6rem;
    width: 12px;
    height: 12px;
    color: var(--text-muted);
}

.search-box input {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    padding: 0.35rem 0.5rem 0.35rem 1.8rem;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.8rem;
    width: 160px;
    outline: none;
    transition: var(--transition-fast);
}

.search-box input:focus {
    border-color: var(--color-primary-hover);
    width: 200px;
}

.select-filter {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    padding: 0.35rem 0.5rem;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.8rem;
    outline: none;
    cursor: pointer;
    transition: var(--transition-fast);
}

.select-filter:focus {
    border-color: var(--color-primary-hover);
}

/* Transactions List */
.transactions-list {
    display: flex;
    flex-direction: column;
}

.transaction-item {
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    align-items: center;
    gap: 1rem;
    padding: 0.8rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

.transaction-item:hover {
    background-color: rgba(255, 255, 255, 0.01);
}

.transaction-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    background-color: var(--bg-base);
}

.transaction-icon i {
    width: 14px;
    height: 14px;
}

/* Grayscale Tag Badges for developer tools */
.cat-food { color: var(--color-warning); }
.cat-transport { color: var(--color-info); }
.cat-shopping { color: #a855f7; }
.cat-bills { color: var(--color-danger); }
.cat-others { color: var(--text-secondary); }

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

.transaction-desc {
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--text-primary);
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

.transaction-date-cat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.1rem;
}

.transaction-date {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.cat-badge {
    font-size: 0.65rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    padding: 0.05rem 0.35rem;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.25px;
    background-color: var(--bg-base);
}

.transaction-amount {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.btn-action {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.3rem;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.btn-action:hover {
    color: var(--color-danger);
    background-color: rgba(239, 68, 68, 0.05);
}

.btn-action i {
    width: 14px;
    height: 14px;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
    gap: 0.5rem;
}

.empty-state i {
    width: 32px;
    height: 32px;
    opacity: 0.4;
}

.empty-state p {
    font-size: 0.85rem;
    font-weight: 500;
}

/* Data Management layout */
.data-actions {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.import-export-row {
    display: flex;
    gap: 0.5rem;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 1.25rem; /* Prevents modal from touching edges on small screens */
}

.modal {
    width: 100%;
    max-width: 400px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 0.95rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.3rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

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

.modal-body {
    padding: 1.25rem;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

/* Utilities */
.hidden {
    display: none !important;
}

/* Scrollbar styles */
.scrollable-y::-webkit-scrollbar {
    width: 4px;
}

.scrollable-y::-webkit-scrollbar-track {
    background: transparent;
}

.scrollable-y::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: var(--radius-full);
}

.scrollable-y::-webkit-scrollbar-thumb:hover {
    background-color: var(--border-color-hover);
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .grid-col-left {
        grid-column: span 2;
    }
    
    .grid-col-right {
        grid-column: span 2;
        display: grid;
        grid-template-columns: 1.2fr 1fr;
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .app-container {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        display: none;
    }
    
    .main-content {
        padding: 1.5rem;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .grid-col-left,
    .grid-col-right {
        grid-column: span 1;
    }
    
    .grid-col-right {
        display: flex;
        flex-direction: column;
    }
    
    .main-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
    
    .header-actions {
        width: 100%;
    }
    
    .header-actions button {
        flex: 1;
    }
}

/* --- View Toggle Logic --- */
.view-transactions .kpi-card,
.view-transactions #card-charts,
.view-transactions #card-data-management {
    display: none !important;
}

.view-analytics .kpi-card,
.view-analytics #card-transactions-list,
.view-analytics #card-add-transaction {
    display: none !important;
}

/* Make grid columns full width when single columns are used */
.view-analytics .grid-col-left,
.view-transactions .grid-col-left {
    grid-column: span 2;
}

.view-analytics .grid-col-right,
.view-transactions .grid-col-right {
    grid-column: span 1;
}

/* --- Mobile Bottom Navigation --- */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
    height: 56px;
    justify-content: space-around;
    align-items: center;
    z-index: 90;
    padding-bottom: env(safe-area-inset-bottom, 0px);
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.7rem;
    font-weight: 500;
    transition: var(--transition-fast);
    flex: 1;
    height: 100%;
}

.bottom-nav-item i {
    width: 16px;
    height: 16px;
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.bottom-nav-item:hover,
.bottom-nav-item:focus {
    color: var(--text-primary);
}

.bottom-nav-item:hover i {
    color: var(--text-primary);
}

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

.bottom-nav-item.active i {
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .bottom-nav {
        display: flex;
    }
    .main-content {
        padding-bottom: 80px !important; /* Prevents mobile bottom-nav from covering page contents */
    }
}