/* ==========================================================================
   SpendLog Design System & Stylesheet
   Modern, Fast, Local-First Expense & Budget Tracker
   ========================================================================== */

:root {
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Light Theme (Default CSS Variables) */
    --bg-page: #f8fafc;
    --bg-surface: #ffffff;
    --bg-surface-raised: #f1f5f9;
    --bg-surface-hover: #e2e8f0;
    --bg-surface-glass: rgba(255, 255, 255, 0.85);

    --border-subtle: #e2e8f0;
    --border-medium: #cbd5e1;
    --border-focus: #0f172a;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;

    /* Brand / Semantic Accents */
    --primary: #0f172a;
    --primary-hover: #1e293b;
    --primary-light: #e2e8f0;

    --accent-emerald: #10b981;
    --accent-emerald-subtle: #d1fae5;
    --accent-emerald-text: #065f46;

    --accent-amber: #f59e0b;
    --accent-amber-subtle: #fef3c7;
    --accent-amber-text: #92400e;

    --accent-rose: #f43f5e;
    --accent-rose-subtle: #ffe4e6;
    --accent-rose-text: #9f1239;

    --accent-indigo: #6366f1;
    --accent-indigo-subtle: #e0e7ff;
    --accent-indigo-text: #3730a3;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.03);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    --transition-fast: 0.15s ease;
    --transition-base: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark Theme Overrides */
html.dark, html[data-theme="dark"] {
    --bg-page: #090d16;
    --bg-surface: #111827;
    --bg-surface-raised: #1e293b;
    --bg-surface-hover: #26334d;
    --bg-surface-glass: rgba(17, 24, 39, 0.85);

    --border-subtle: #1f293d;
    --border-medium: #334155;
    --border-focus: #38bdf8;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-inverse: #0f172a;

    --primary: #f8fafc;
    --primary-hover: #e2e8f0;
    --primary-light: #1e293b;

    --accent-emerald: #10b981;
    --accent-emerald-subtle: rgba(16, 185, 129, 0.15);
    --accent-emerald-text: #34d399;

    --accent-amber: #f59e0b;
    --accent-amber-subtle: rgba(245, 158, 11, 0.15);
    --accent-amber-text: #fbbf24;

    --accent-rose: #f43f5e;
    --accent-rose-subtle: rgba(244, 63, 94, 0.15);
    --accent-rose-text: #fb7185;

    --accent-indigo: #818cf8;
    --accent-indigo-subtle: rgba(129, 140, 248, 0.15);
    --accent-indigo-text: #c7d2fe;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
}

/* Reset & Base Setup */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Tabular lining figures for numbers */
.num, .amount-val, .metric-value, .chart-value, .stat-value {
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.02em;
}

/* App Shell Structure */
.spendlog-shell {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 1.25rem 4rem 1.25rem;
}

/* Header & Navigation */
.app-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 2rem;
    position: sticky;
    top: 0;
    z-index: 40;
    background-color: var(--bg-surface-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.brand-section {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
}

.brand-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    font-size: 1.25rem;
    box-shadow: var(--shadow-sm);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.brand-version {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: var(--radius-full);
    background-color: var(--bg-surface-raised);
    color: var(--text-secondary);
}

.brand-slogan {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.nav-links-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--bg-surface-raised);
    padding: 0.3rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-subtle);
}

.nav-tab-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.9rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

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

.nav-tab-item.active {
    color: var(--text-inverse);
    background-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.header-actions-group {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

/* Action Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.55rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
    line-height: 1.25;
}

.btn:active {
    transform: scale(0.98);
}

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

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

.btn-accent {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.btn-accent:hover {
    filter: brightness(1.08);
}

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

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

.btn-ghost {
    background-color: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
}

.btn-icon {
    width: 38px;
    height: 38px;
    padding: 0;
    border-radius: var(--radius-md);
}

.btn-danger {
    background-color: var(--accent-rose);
    color: #ffffff;
}

.btn-danger:hover {
    background-color: #e11d48;
}

/* Date Navigator Toolbar */
.month-selector-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 0.75rem 1.25rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.month-nav-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.month-title-display {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    min-width: 160px;
    text-align: center;
}

/* Metric Cards Grid */
.metrics-overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.75rem;
}

.metric-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.metric-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.metric-card.highlight {
    border-color: rgba(16, 185, 129, 0.4);
    background: linear-gradient(to bottom right, var(--bg-surface), var(--accent-emerald-subtle));
}

.metric-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.metric-card-label {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-secondary);
}

.metric-card-icon {
    font-size: 1.2rem;
}

.metric-card-value {
    font-size: 1.85rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.metric-card-sub {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* Pacing Status Badges */
.pacing-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.pacing-badge.under {
    background-color: var(--accent-emerald-subtle);
    color: var(--accent-emerald-text);
}

.pacing-badge.edge {
    background-color: var(--accent-amber-subtle);
    color: var(--accent-amber-text);
}

.pacing-badge.over {
    background-color: var(--accent-rose-subtle);
    color: var(--accent-rose-text);
}

/* Dashboard Analytics Grid */
.dashboard-columns-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

@media (max-width: 1024px) {
    .dashboard-columns-grid {
        grid-template-columns: 1fr;
    }
}

.card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* SVG Donut Chart */
.chart-container-donut {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.donut-svg-wrapper {
    position: relative;
    width: 170px;
    height: 170px;
    flex-shrink: 0;
}

.donut-svg-wrapper svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.donut-center-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    pointer-events: none;
}

.donut-center-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
}

.donut-center-value {
    font-size: 1.1rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.category-legend-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    flex: 1;
    min-width: 220px;
}

.category-legend-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.85rem;
    padding: 0.35rem 0.5rem;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.category-legend-item:hover {
    background-color: var(--bg-surface-raised);
}

.cat-legend-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cat-color-dot {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
}

.cat-legend-name {
    font-weight: 600;
    color: var(--text-primary);
}

.cat-legend-right {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.cat-legend-amount {
    font-weight: 700;
}

.cat-legend-pct {
    font-size: 0.75rem;
    color: var(--text-muted);
    min-width: 38px;
    text-align: right;
}

/* Weekly Trend Bar Chart */
.trend-chart-container {
    display: flex;
    align-items: flex-end;
    gap: 0.45rem;
    height: 160px;
    padding-top: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-subtle);
    overflow-x: auto;
}

.trend-bar-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
    justify-content: flex-end;
    min-width: 18px;
    position: relative;
    cursor: pointer;
}

.trend-bar-fill {
    width: 100%;
    max-width: 28px;
    border-radius: 4px 4px 0 0;
    background-color: var(--accent-indigo);
    transition: height var(--transition-base), background-color var(--transition-fast);
}

.trend-bar-column:hover .trend-bar-fill {
    background-color: #4f46e5;
}

.trend-bar-column.is-today .trend-bar-fill {
    background-color: var(--accent-emerald);
}

.trend-bar-label {
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-top: 0.4rem;
}

/* Transaction List & Rows */
.transactions-table-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.transaction-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1rem;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.transaction-row:hover {
    border-color: var(--border-medium);
    transform: translateX(2px);
}

.tx-left {
    display: flex;
    align-items: center;
    gap: 0.9rem;
}

.tx-cat-icon {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    flex-shrink: 0;
}

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

.tx-title {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--text-primary);
}

.tx-meta {
    font-size: 0.78rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tx-right {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.tx-amount {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--text-primary);
}

.tx-actions {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    opacity: 0.85;
}

.tx-actions:hover {
    opacity: 1;
}

/* Filter Bar */
.filter-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.search-input-box {
    position: relative;
    flex: 1;
    min-width: 220px;
}

.search-input {
    width: 100%;
    padding: 0.55rem 0.75rem 0.55rem 2.25rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-medium);
    background-color: var(--bg-surface);
    color: var(--text-primary);
    font-size: 0.875rem;
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.select-control {
    padding: 0.55rem 0.85rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-medium);
    background-color: var(--bg-surface);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
}

/* Modal Overlay & Card */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    animation: fadeIn 0.2s ease-out;
}

.modal-dialog-box {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    padding: 1.75rem;
    animation: slideUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-header-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.modal-title-text {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1.25rem;
}

.form-label {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.form-input, .form-textarea {
    width: 100%;
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-medium);
    background-color: var(--bg-surface-raised);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.92rem;
    transition: border-color var(--transition-fast);
}

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

.form-amount-input {
    font-size: 1.75rem;
    font-weight: 800;
    text-align: center;
    padding: 0.75rem;
}

/* Category Grid Picker in Modal */
.category-picker-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 0.5rem;
    max-height: 180px;
    overflow-y: auto;
    padding: 0.25rem;
}

.category-pick-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    padding: 0.6rem 0.4rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background-color: var(--bg-surface-raised);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.category-pick-card:hover {
    border-color: var(--border-medium);
    transform: translateY(-1px);
}

.category-pick-card.selected {
    border-color: var(--primary);
    background-color: var(--primary-light);
    font-weight: 700;
}

.category-pick-icon {
    font-size: 1.35rem;
}

.category-pick-name {
    font-size: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 100%;
}

/* Quick Presets Bar */
.quick-presets-row {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
    margin-top: 0.4rem;
}

.preset-chip {
    padding: 0.25rem 0.6rem;
    font-size: 0.78rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    background-color: var(--bg-surface-raised);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    cursor: pointer;
}

.preset-chip:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
}

/* Notification Toast */
.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 120;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast-item {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    padding: 0.75rem 1.15rem;
    box-shadow: var(--shadow-lg);
    font-size: 0.875rem;
    font-weight: 600;
    animation: slideInRight 0.25s ease-out;
}

.toast-item.success {
    border-left: 4px solid var(--accent-emerald);
}

.toast-item.warning {
    border-left: 4px solid var(--accent-amber);
}

.toast-item.danger {
    border-left: 4px solid var(--accent-rose);
}

/* Initial loader */
.initial-app-loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    gap: 1rem;
    color: var(--text-primary);
    background-color: var(--bg-page);
}

.loader-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-medium);
    border-top-color: var(--accent-emerald);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loader-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.loader-logo {
    font-size: 2rem;
}

.loader-title {
    font-size: 1.5rem;
    font-weight: 800;
}

.loader-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(24px); }
    to { opacity: 1; transform: translateX(0); }
}

/* Responsive tweaks */
@media (max-width: 640px) {
    .spendlog-shell {
        padding: 0 0.75rem 4rem 0.75rem;
    }
    .app-nav-header {
        flex-direction: column;
        gap: 0.75rem;
        align-items: stretch;
    }
    .nav-links-group {
        justify-content: space-around;
    }
    .metrics-overview-grid {
        grid-template-columns: 1fr;
    }
}