/* ==================== CSS Variables & Tokens ==================== */
:root {
    /* Colors - Light Mode */
    --bg-primary: #f0f2f5;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-sidebar: #0f172a;
    --bg-sidebar-hover: #1e293b;
    --bg-sidebar-active: rgba(99, 102, 241, 0.15);
    --bg-modal: #ffffff;
    --bg-input: #f8fafc;

    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-sidebar: #cbd5e1;
    --text-sidebar-active: #818cf8;
    --text-on-dark: #ffffff;

    --border-color: #e2e8f0;
    --border-input: #cbd5e1;

    --accent-primary: #6366f1;
    --accent-primary-hover: #4f46e5;
    --accent-primary-light: rgba(99, 102, 241, 0.1);

    --color-income: #10b981;
    --color-income-light: rgba(16, 185, 129, 0.1);
    --color-income-gradient: linear-gradient(135deg, #10b981, #059669);

    --color-expense: #ef4444;
    --color-expense-light: rgba(239, 68, 68, 0.1);
    --color-expense-gradient: linear-gradient(135deg, #ef4444, #dc2626);

    --color-balance: #6366f1;
    --color-balance-light: rgba(99, 102, 241, 0.1);
    --color-balance-gradient: linear-gradient(135deg, #6366f1, #4f46e5);

    --color-danger: #ef4444;
    --color-danger-hover: #dc2626;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    --sidebar-width: 260px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    /* Chart Colors */
    --chart-1: #6366f1;
    --chart-2: #ec4899;
    --chart-3: #f59e0b;
    --chart-4: #10b981;
    --chart-5: #3b82f6;
    --chart-6: #8b5cf6;
    --chart-7: #14b8a6;
    --chart-8: #f97316;
}

/* Dark Mode */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-sidebar: #0b1120;
    --bg-sidebar-hover: #162032;
    --bg-modal: #1e293b;
    --bg-input: #0f172a;

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border-color: #334155;
    --border-input: #475569;

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

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
}

h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
}

/* ==================== Sidebar ==================== */
.sidebar {
    width: var(--sidebar-width);
    min-height: 100vh;
    background: var(--bg-sidebar);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    transition: transform var(--transition);
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 800;
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.logo-text {
    font-size: 22px;
    font-weight: 800;
    background: linear-gradient(135deg, #818cf8, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border: none;
    background: transparent;
    color: var(--text-sidebar);
    font-family: inherit;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    width: 100%;
    text-align: left;
}

.nav-item:hover {
    background: var(--bg-sidebar-hover);
    color: #e2e8f0;
}

.nav-item.active {
    background: var(--bg-sidebar-active);
    color: var(--text-sidebar-active);
}

.nav-item.active svg {
    filter: drop-shadow(0 0 6px rgba(99, 102, 241, 0.3));
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px;
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--text-sidebar);
    transition: all var(--transition);
}

.theme-toggle:hover {
    background: var(--bg-sidebar-hover);
}

.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* ==================== Mobile Header ==================== */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--bg-sidebar);
    z-index: 90;
    padding: 0 16px;
    align-items: center;
    gap: 12px;
}

.menu-toggle {
    background: none;
    border: none;
    color: var(--text-sidebar);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: background var(--transition);
}

.menu-toggle:hover {
    background: var(--bg-sidebar-hover);
}

.overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 95;
    backdrop-filter: blur(4px);
}

.overlay.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* ==================== Main Content ==================== */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 32px;
    max-width: 1200px;
    width: calc(100% - var(--sidebar-width));
}

.page {
    display: none;
    animation: pageIn 0.4s ease;
}

.page.active {
    display: block;
}

@keyframes pageIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.page-header {
    margin-bottom: 28px;
}

.page-header h1 {
    font-size: 28px;
    letter-spacing: -0.5px;
    margin-bottom: 4px;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ==================== Summary Cards ==================== */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 28px;
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
}

.card-balance::before { background: var(--color-balance-gradient); }
.card-income::before { background: var(--color-income-gradient); }
.card-expense::before { background: var(--color-expense-gradient); }

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

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.card-balance .card-icon {
    background: var(--color-balance-light);
    color: var(--color-balance);
}

.card-income .card-icon {
    background: var(--color-income-light);
    color: var(--color-income);
}

.card-expense .card-icon {
    background: var(--color-expense-light);
    color: var(--color-expense);
}

.card-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.card-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.card-value {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.card-income .card-value { color: var(--color-income); }
.card-expense .card-value { color: var(--color-expense); }

/* ==================== Section Card ==================== */
.section-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 18px;
}

.btn-link {
    background: none;
    border: none;
    color: var(--accent-primary);
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: color var(--transition);
}

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

/* ==================== Transaction List ==================== */
.transaction-list {
    display: flex;
    flex-direction: column;
}

.transaction-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition);
    cursor: default;
}

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

.transaction-item:hover {
    background: var(--accent-primary-light);
    margin: 0 -12px;
    padding-left: 12px;
    padding-right: 12px;
    border-radius: var(--radius-sm);
}

.transaction-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.transaction-icon.income {
    background: var(--color-income-light);
}

.transaction-icon.expense {
    background: var(--color-expense-light);
}

.transaction-details {
    flex: 1;
    min-width: 0;
}

.transaction-category {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 2px;
}

.transaction-desc {
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.transaction-right {
    text-align: right;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

.transaction-amount {
    font-weight: 700;
    font-size: 15px;
}

.transaction-amount.income { color: var(--color-income); }
.transaction-amount.expense { color: var(--color-expense); }

.transaction-date {
    font-size: 12px;
    color: var(--text-muted);
}

.transaction-actions {
    display: flex;
    gap: 4px;
    margin-left: 8px;
    opacity: 0;
    transition: opacity var(--transition);
}

.transaction-item:hover .transaction-actions {
    opacity: 1;
}

.btn-action {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition);
}

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

.btn-action.danger:hover {
    background: var(--color-expense-light);
    color: var(--color-danger);
}

/* ==================== Empty State ==================== */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 20px;
    text-align: center;
    color: var(--text-muted);
}

.empty-state p {
    font-size: 16px;
    font-weight: 600;
    margin-top: 16px;
    color: var(--text-secondary);
}

.empty-state span {
    font-size: 14px;
    margin-top: 6px;
}

/* ==================== Filter Bar ==================== */
.filter-bar {
    display: flex;
    gap: 12px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.filter-select {
    padding: 10px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-input);
    background: var(--bg-input);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition);
    min-width: 150px;
}

.filter-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-primary-light);
}

/* ==================== Report Page ==================== */
.report-controls {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.report-toggle {
    display: flex;
    background: var(--bg-input);
    border-radius: var(--radius-full);
    padding: 4px;
    border: 1px solid var(--border-color);
}

.toggle-btn {
    padding: 8px 20px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition);
}

.toggle-btn.active {
    background: var(--accent-primary);
    color: white;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.report-selector {
    display: flex;
    align-items: center;
    gap: 12px;
}

.report-selector.hidden {
    display: none;
}

.btn-icon {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition);
}

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

.report-period {
    font-weight: 600;
    font-size: 16px;
    min-width: 140px;
    text-align: center;
}

.report-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 24px;
}

.report-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.report-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
}

.report-income::before { background: var(--color-income-gradient); }
.report-expense::before { background: var(--color-expense-gradient); }
.report-net::before { background: var(--color-balance-gradient); }

.report-card-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
    display: block;
    margin-bottom: 8px;
}

.report-card-value {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.report-income .report-card-value { color: var(--color-income); }
.report-expense .report-card-value { color: var(--color-expense); }

/* ==================== Charts ==================== */
.charts-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.chart-card {
    min-height: 350px;
}

.chart-card h3 {
    font-size: 16px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.chart-container {
    position: relative;
    width: 100%;
    min-height: 280px;
}

.chart-container-pie {
    display: flex;
    align-items: center;
    gap: 20px;
}

.chart-container-pie canvas {
    max-width: 180px;
    max-height: 180px;
}

.pie-legend {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.legend-label {
    flex: 1;
    color: var(--text-secondary);
}

.legend-value {
    font-weight: 600;
    font-size: 13px;
}

/* ==================== Category Breakdown ==================== */
.category-breakdown {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.category-row {
    display: flex;
    align-items: center;
    gap: 14px;
}

.category-emoji {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    background: var(--bg-primary);
}

.category-info {
    flex: 1;
}

.category-name {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 6px;
}

.category-bar-bg {
    width: 100%;
    height: 8px;
    background: var(--bg-primary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.category-bar {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.category-amount {
    font-weight: 600;
    font-size: 14px;
    white-space: nowrap;
    min-width: 100px;
    text-align: right;
}

.category-percent {
    font-size: 12px;
    color: var(--text-muted);
    text-align: right;
    min-width: 45px;
}

/* ==================== FAB ==================== */
.fab {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 80;
    transition: all var(--transition);
}

.fab:hover {
    transform: scale(1.1) rotate(90deg);
    box-shadow: 0 8px 28px rgba(99, 102, 241, 0.5);
}

.fab:active {
    transform: scale(0.95);
}

/* ==================== Modal ==================== */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 200;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.modal {
    background: var(--bg-modal);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 480px;
    padding: 28px;
    box-shadow: var(--shadow-xl);
    animation: modalIn 0.3s ease;
    border: 1px solid var(--border-color);
}

.modal-small {
    max-width: 380px;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

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

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.modal-header h2 {
    font-size: 20px;
}

.btn-close {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--bg-primary);
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition);
}

.btn-close:hover {
    background: var(--color-expense-light);
    color: var(--color-danger);
}

.delete-message {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 15px;
    line-height: 1.5;
}

/* ==================== Form ==================== */
.type-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 20px;
}

.type-option {
    cursor: pointer;
}

.type-option input {
    display: none;
}

.type-label {
    display: block;
    text-align: center;
    padding: 12px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 14px;
    border: 2px solid var(--border-color);
    transition: all var(--transition);
}

.type-expense {
    color: var(--text-secondary);
}

.type-income {
    color: var(--text-secondary);
}

.type-option input:checked + .type-expense {
    background: var(--color-expense-light);
    border-color: var(--color-expense);
    color: var(--color-expense);
}

.type-option input:checked + .type-income {
    background: var(--color-income-light);
    border-color: var(--color-income);
    color: var(--color-income);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-input);
    background: var(--bg-input);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 15px;
    transition: all var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-primary-light);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.btn {
    flex: 1;
    padding: 12px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
    transform: translateY(-1px);
}

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

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

.btn-danger {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    box-shadow: 0 4px 16px rgba(239, 68, 68, 0.4);
    transform: translateY(-1px);
}

/* ==================== Toast ==================== */
.toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.4s ease, toastOut 0.3s ease 2.5s forwards;
    max-width: 340px;
}

.toast-success {
    background: var(--color-income);
    color: white;
}

.toast-error {
    background: var(--color-danger);
    color: white;
}

.toast-info {
    background: var(--accent-primary);
    color: white;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(100%); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(100%); }
}

/* ==================== Responsive ==================== */
@media (max-width: 1024px) {
    .summary-cards {
        grid-template-columns: 1fr;
    }
    .report-summary {
        grid-template-columns: 1fr;
    }
    .charts-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open {
        transform: translateX(0);
    }
    .mobile-header {
        display: flex;
    }
    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 80px 16px 100px;
    }
    .page-header h1 {
        font-size: 24px;
    }
    .fab {
        bottom: 24px;
        right: 24px;
    }
    .filter-bar {
        flex-direction: column;
    }
    .filter-select {
        min-width: auto;
        width: 100%;
    }
    .report-controls {
        flex-direction: column;
        align-items: flex-start;
    }
    .chart-container-pie {
        flex-direction: column;
    }
    .chart-container-pie canvas {
        max-width: 200px;
        max-height: 200px;
        margin: 0 auto;
    }
    .transaction-actions {
        opacity: 1;
    }
}

/* ==================== Scrollbar ==================== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ==================== Lock Screen ==================== */
.lock-screen {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 500;
    background: var(--bg-primary);
    align-items: center;
    justify-content: center;
}

.lock-screen.active {
    display: flex;
}

.lock-screen::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 50% 80%, rgba(236, 72, 153, 0.08) 0%, transparent 50%);
}

.lock-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 400px;
    padding: 40px 32px;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
    text-align: center;
    animation: modalIn 0.5s ease;
}

.lock-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-bottom: 12px;
}

.lock-logo-icon {
    width: 56px;
    height: 56px;
    font-size: 28px;
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.lock-logo-text {
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(135deg, #6366f1, #8b5cf6, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.lock-subtitle {
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: 28px;
}

.lock-form {
    text-align: left;
}

.lock-form .form-group {
    margin-bottom: 16px;
}

.password-input-wrapper {
    position: relative;
}

.password-input-wrapper input {
    width: 100%;
    padding: 12px 44px 12px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-input);
    background: var(--bg-input);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 15px;
    transition: all var(--transition);
}

.password-input-wrapper input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-primary-light);
}

.toggle-password {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: color var(--transition);
}

.toggle-password:hover {
    color: var(--text-secondary);
}

.lock-error {
    background: var(--color-expense-light);
    color: var(--color-expense);
    padding: 10px 14px;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 16px;
    animation: shake 0.4s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-6px); }
    50% { transform: translateX(6px); }
    75% { transform: translateX(-4px); }
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    user-select: none;
}

.remember-me input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-primary);
    cursor: pointer;
}

.lock-btn {
    width: 100%;
    padding: 14px;
    font-size: 16px;
    border-radius: var(--radius-md);
}

.lock-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 20px 0;
    color: var(--text-secondary);
    font-size: 14px;
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ==================== Logout Button ==================== */
.btn-logout {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 16px;
    margin-top: 8px;
    border: none;
    background: transparent;
    color: var(--text-sidebar);
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-logout:hover {
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
}