:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #888888;
    --text-muted: #555555;
    --accent: #00ff88;
    --accent-dim: #00cc6a;
    --income: #00ff88;
    --expense: #ff4444;
    --border: #252525;
    --shadow: rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'IBM Plex Mono', monospace;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.app {
    min-height: 100vh;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 1.25rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 1.25rem;
    font-weight: 500;
    letter-spacing: -0.02em;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.375rem;
    transition: background 0.2s;
}

.icon-btn:hover {
    background: var(--bg-tertiary);
}

/* Main */
.main {
    padding: 1.25rem;
}

.view {
    display: none;
    animation: fadeIn 0.3s ease;
}

.view.active {
    display: block;
}

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

/* Balance Card */
.balance-card {
    background: var(--bg-secondary);
    padding: 2rem 1.5rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border);
    margin-bottom: 1.5rem;
    text-align: center;
}

.balance-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.balance-amount {
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: -0.03em;
    margin-bottom: 0.25rem;
}

.balance-currency {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

/* Quick Actions */
.quick-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.quick-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--text-primary);
    transition: all 0.2s;
}

.quick-btn:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.quick-btn svg {
    stroke-width: 2.5;
}

.quick-btn.income svg {
    color: var(--income);
}

.quick-btn.expense svg {
    color: var(--expense);
}

/* Sections */
.sections {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.section {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.25rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.section-header h2 {
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.add-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    width: 2rem;
    height: 2rem;
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 1.25rem;
    color: var(--accent);
    transition: all 0.2s;
}

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

/* Items List */
.items-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.875rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    transition: all 0.2s;
}

.item:hover {
    border-color: var(--accent);
}

.item-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    flex: 1;
}

.item-name {
    font-size: 0.875rem;
    font-weight: 500;
}

.item-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.item-value {
    font-size: 0.875rem;
    font-weight: 500;
    text-align: right;
    margin-right: 1rem;
}

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

/* Transactions */
.transactions-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.transaction {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 0.375rem;
    border: 1px solid var(--border);
}

.transaction-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.transaction-category {
    font-size: 0.875rem;
}

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

.transaction-amount {
    font-size: 0.875rem;
    font-weight: 500;
}

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

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

/* View Header */
.view-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.back-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

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

.view-header h2 {
    font-size: 1.25rem;
    font-weight: 500;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
}

.tabs::-webkit-scrollbar {
    height: 4px;
}

.tabs::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.tab {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 0.625rem 1rem;
    border-radius: 0.375rem;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    white-space: nowrap;
    transition: all 0.2s;
}

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

.tab.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg-primary);
}

.tab-content {
    min-height: 300px;
}

/* Forms */
.form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input,
.form-group select,
.form-group textarea {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 0.875rem;
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--text-primary);
    transition: border-color 0.2s;
}

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

.form-group textarea {
    resize: vertical;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: 0.875rem 1.5rem;
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid;
}

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

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

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

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

/* Menu */
.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    display: none;
    backdrop-filter: blur(4px);
}

.menu-overlay.active {
    display: block;
    animation: fadeIn 0.2s ease;
}

.menu {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 300px;
    max-width: 85vw;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    padding: 1.5rem;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { transform: translateX(100%); }
    to { transform: translateX(0); }
}

.menu-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-primary);
    cursor: pointer;
    margin-bottom: 2rem;
}

.menu-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.menu-item {
    padding: 0.875rem;
    border-radius: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.2s;
    display: block;
}

.menu-item:hover {
    background: var(--bg-tertiary);
}

.menu-item.active {
    background: var(--accent);
    color: var(--bg-primary);
}

.menu-item.danger {
    color: var(--expense);
}

.menu-divider {
    height: 1px;
    background: var(--border);
    margin: 0.5rem 0;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
    animation: fadeIn 0.2s ease;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.5rem;
    width: 90%;
    max-width: 400px;
    animation: scaleIn 0.3s ease;
}

@keyframes scaleIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.modal-content h3 {
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

#modalBody {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.modal-actions {
    display: flex;
    gap: 0.75rem;
}

.modal-actions button {
    flex: 1;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

.empty-state svg {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
    opacity: 0.3;
}

.empty-state p {
    font-size: 0.875rem;
}

/* Utility */
.text-muted {
    color: var(--text-muted);
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }

/* Calendar */
.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding: 0 0.5rem;
}

.calendar-header h2 {
    font-size: 1.125rem;
    font-weight: 500;
}

.nav-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

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

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.375rem;
    margin-bottom: 1.5rem;
}

.calendar-day-header {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
    padding: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.calendar-day {
    aspect-ratio: 1;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    padding: 0.25rem;
}

.calendar-day:hover {
    border-color: var(--accent);
    transform: scale(1.05);
}

.calendar-day.other-month {
    opacity: 0.3;
    pointer-events: none;
}

.calendar-day.today {
    border-color: var(--accent);
    background: var(--bg-tertiary);
}

.calendar-day.selected {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg-primary);
}

.calendar-day.in-range {
    background: rgba(0, 255, 136, 0.1);
    border-color: var(--accent);
}

.day-number {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.125rem;
}

.day-indicator {
    display: flex;
    gap: 0.125rem;
    margin-top: 0.125rem;
}

.day-dot {
    width: 0.25rem;
    height: 0.25rem;
    border-radius: 50%;
}

.day-dot.income {
    background: var(--income);
}

.day-dot.expense {
    background: var(--expense);
}

/* Stats Panel */
.stats-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-radius: 1rem 1rem 0 0;
    padding: 1.25rem;
    transform: translateY(100%);
    transition: transform 0.3s ease;
    z-index: 500;
    max-width: 600px;
    margin: 0 auto;
    max-height: 70vh;
    overflow-y: auto;
}

.stats-panel.active {
    transform: translateY(0);
}

.stats-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.stats-header h3 {
    font-size: 1rem;
    font-weight: 500;
}

.close-stats {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-primary);
    cursor: pointer;
    line-height: 1;
}

.stats-content {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.stat-value {
    font-size: 1.125rem;
    font-weight: 500;
}

.stat-divider {
    height: 1px;
    background: var(--border);
    margin: 0.25rem 0;
}

.stats-transactions {
    margin-top: 1.5rem;
}

.stats-transaction-item {
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: 0.5rem;
    margin-bottom: 0.75rem;
    border: 1px solid var(--border);
}

.stats-transaction-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.stats-transaction-category {
    font-size: 0.875rem;
    font-weight: 500;
}

.stats-transaction-amount {
    font-size: 1rem;
    font-weight: 500;
}

.stats-transaction-comment {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: 0.375rem;
    line-height: 1.5;
}

.stats-transaction-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.btn-small {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    border-radius: 0.375rem;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-small.edit {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-small.edit:hover {
    background: var(--accent);
    color: var(--bg-primary);
}

.btn-small.delete {
    border-color: var(--expense);
    color: var(--expense);
}

.btn-small.delete:hover {
    background: var(--expense);
    color: var(--bg-primary);
}

/* Calculator Result */
.calculator-result {
    margin-top: 2rem;
}

.result-summary {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.625rem 0;
}

.result-item:not(:last-child) {
    border-bottom: 1px solid var(--border);
}

.result-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.result-value {
    font-size: 1rem;
    font-weight: 500;
}

.result-value.highlight {
    color: var(--accent);
    font-size: 1.125rem;
}

.result-table {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    overflow: hidden;
}

.table-header {
    display: grid;
    grid-template-columns: 1.5fr 2fr 1.5fr 1.5fr 2fr;
    gap: 0.5rem;
    padding: 0.875rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
}

.table-row {
    display: grid;
    grid-template-columns: 1.5fr 2fr 1.5fr 1.5fr 2fr;
    gap: 0.5rem;
    padding: 0.875rem;
    border-bottom: 1px solid var(--border);
}

.table-row:last-child {
    border-bottom: none;
}

.table-cell {
    font-size: 0.75rem;
    overflow: hidden;
    text-overflow: ellipsis;
}

.table-header .table-cell {
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.7rem;
}

/* Modal Header */
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.close-modal {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-primary);
    cursor: pointer;
    line-height: 1;
}

/* History */
.history-filters {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.filter-select {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 0.875rem;
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.2s;
}

.filter-select:focus {
    outline: none;
    border-color: var(--accent);
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.history-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 1rem;
}

.history-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.history-item-left {
    flex: 1;
}

.history-item-category {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.history-item-date {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.history-item-amount {
    font-size: 1rem;
    font-weight: 500;
    text-align: right;
}

.history-item-comment {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    line-height: 1.5;
}

.history-item-source {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.375rem;
}

.history-item-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.history-empty {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}