/* ========================================
   ROOT & VARIABLES
   ======================================== */
:root {
    --primary-color: #7fd3a1;
    --secondary-color: #2f855a;
    --accent-color: #63b3a6;
    --danger-color: #f56565;
    --light-bg: #f0f4f8;
    --white: #ffffff;
    --text-dark: #1a202c;
    --text-muted: #718096;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    --sidebar-width: 280px;
    --transition: all 0.3s ease;
}

body.theme-dark {
    --primary-color: #7fd3a1;
    --secondary-color: #4ade80;
    --accent-color: #63b3a6;
    --danger-color: #f87171;
    --light-bg: #0f172a;
    --white: #111827;
    --text-dark: #e2e8f0;
    --text-muted: #94a3b8;
    --border-color: #1f2937;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
}

/* ========================================
   GLOBAL STYLES
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-dark);
    background-color: var(--light-bg);
    height: 100%;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--secondary-color);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    border-radius: var(--radius);
    transition: var(--transition);
}

input, select, textarea {
    font-family: inherit;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 8px 12px;
    font-size: 14px;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(127, 211, 161, 0.2);
}

/* ========================================
   SKIP LINK
   ======================================== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: var(--white);
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

/* ========================================
   APP CONTAINER
   ======================================== */
.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ========================================
   STARTUP PROMPT
   ======================================== */
.startup-overlay {
    position: fixed;
    inset: 0;
    background: rgba(26, 32, 44, 0.55);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 24px;
}

.startup-overlay.is-visible {
    display: flex;
}

.startup-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    max-width: 420px;
    width: 100%;
    padding: 24px;
    text-align: left;
}

.startup-card h2 {
    font-size: 20px;
    margin-bottom: 8px;
}

.startup-card p {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 20px;
}

.startup-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* ========================================
   SIDEBAR
   ======================================== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--white);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 24px 16px;
}

.sidebar-header {
    margin-bottom: 32px;
}

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

.logo .site-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
}

.main-nav {
    margin-bottom: auto;
    flex: 1;
}

.nav-list {
    list-style: none;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius);
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    transition: var(--transition);
}

.nav-link:hover {
    background-color: var(--light-bg);
    color: var(--primary-color);
}

.nav-link.active {
    background-color: rgba(127, 211, 161, 0.2);
    color: var(--primary-color);
}

.nav-icon {
    font-size: 18px;
    display: flex;
    align-items: center;
}

.nav-label {
    flex: 1;
}

/* ========================================
   SIDEBAR EXPORT
   ======================================== */
.sidebar-export {
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
    margin-top: 16px;
}

.sidebar-export h3 {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.export-icon-btn {
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    padding: 10px;
    border-radius: var(--radius);
    margin-right: 8px;
    margin-bottom: 8px;
    font-size: 16px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* ========================================
   SIDEBAR SOCIAL
   ======================================== */
.sidebar-social {
    display: flex;
    gap: 12px;
    margin-top: 16px;
    padding: 12px 0;
    border-top: 1px solid var(--border-color);
}

.social-link {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-bg);
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary-color);
    color: var(--white);
}

/* ========================================
   SIDEBAR FOOTER
   ======================================== */
.sidebar-footer {
    font-size: 11px;
    text-align: center;
    color: var(--text-muted);
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.sidebar-footer strong {
    display: block;
    margin-top: 4px;
    color: var(--text-dark);
}

/* ========================================
   MAIN WRAPPER
   ======================================== */
.main-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ========================================
   TOP HEADER
   ======================================== */
.top-header {
    background: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.header-left {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 12px;
}

.mobile-menu-btn {
    display: none;
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    width: 36px;
    height: 36px;
    border-radius: 10px;
    font-size: 18px;
    align-items: center;
    justify-content: center;
}

.search-bar {
    width: 100%;
    max-width: 450px;
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 14px;
    background: var(--light-bg);
    flex: 1;
}

.search-bar::placeholder {
    color: var(--text-muted);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.notification-btn,
.settings-btn {
    background: var(--light-bg);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
}

.notification-btn:hover,
.settings-btn:hover {
    background: var(--primary-color);
    color: var(--white);
}

.theme-toggle {
    font-size: 16px;
}

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

.avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-color);
}

.user-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
}

.dropdown-btn {
    background: none;
    font-size: 12px;
    color: var(--text-muted);
    cursor: pointer;
}

/* ========================================
   MAIN CONTENT
   ======================================== */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 32px;
}

.main-content section {
    display: none;
}

.main-content section:not(.hidden) {
    display: block;
}

.hidden {
    display: none !important;
}

/* ========================================
   DASHBOARD SECTION
   ======================================== */
.dashboard-section h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 32px;
    color: var(--text-dark);
}

.section-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

/* ========================================
   STATS CARDS CONTAINER
   ======================================== */
.stats-cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

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

.balance-card {
    background: linear-gradient(135deg, var(--primary-color), #58b888);
    color: var(--white);
    grid-column: span 2;
}

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

.balance-card .card-header h3 {
    font-size: 14px;
    font-weight: 500;
    opacity: 0.9;
}

.card-amount {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
}

.card-date {
    font-size: 12px;
    opacity: 0.8;
}

.stats-card {
    background: var(--white);
}

.card-icon {
    font-size: 28px;
    margin-bottom: 12px;
}

.card-label {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.card-percentage {
    font-size: 12px;
    color: var(--danger-color);
    margin-bottom: 12px;
}

.stats-card .card-amount {
    font-size: 24px;
    color: var(--primary-color);
}

/* ========================================
   CHARTS CONTAINER
   ======================================== */
.charts-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 32px;
}

.chart-card,
.breakdown-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-md);
}

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

.chart-header h3,
.breakdown-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
}

.time-select {
    padding: 6px 12px;
    font-size: 12px;
    background: var(--light-bg);
    border: 1px solid var(--border-color);
}

.chart-legend {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-muted);
}

.legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.legend-dot.income {
    background: var(--primary-color);
}

.legend-dot.expense {
    background: var(--text-muted);
}

.breakdown-tabs {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.tab-btn {
    padding: 8px 16px;
    background: var(--light-bg);
    border: none;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn.active {
    background: var(--primary-color);
    color: var(--white);
}

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

#cashflowChart,
#expensesCategoryChart,
.breakdown-chart {
    max-width: 100%;
    height: 250px;
}

/* ========================================
   BOTTOM ROW
   ======================================== */
.bottom-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

/* ========================================
   MONTHLY PAYMENTS CARD
   ======================================== */
.monthly-payments-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-md);
}

.monthly-payments-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.payment-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.payment-icon {
    font-size: 24px;
    width: 40px;
    text-align: center;
}

.payment-info {
    flex: 1;
}

.payment-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 4px;
}

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

.payment-amount {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
}

/* ========================================
   TRANSACTION FORM
   ======================================== */
.transaction-form {
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-md);
    margin-bottom: 24px;
}

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

.form-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
}

.form-subtitle {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
}

.form-group input,
.form-group select {
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    padding: 10px 12px;
    font-size: 13px;
}

.error-text {
    font-size: 11px;
    color: var(--danger-color);
    min-height: 14px;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.primary-btn,
.secondary-btn {
    padding: 10px 18px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
}

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

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

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

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

/* ========================================
   TABLE ACCENTS
   ======================================== */
#transactionsTable .amount-income {
    color: var(--secondary-color);
    font-weight: 600;
}

#transactionsTable .amount-expense {
    color: var(--danger-color);
    font-weight: 600;
}

mark.highlight {
    background: rgba(127, 211, 161, 0.35);
    padding: 0 2px;
    border-radius: 2px;
}

/* ========================================
   TRANSACTIONS SECTION
   ======================================== */
.transactions-section {
    display: block;
}

.transactions-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.transactions-top h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
}

.transactions-controls {
    display: flex;
    gap: 12px;
}

.filter-btn,
.export-btn {
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    background: var(--white);
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.filter-btn:hover,
.export-btn:hover {
    background: var(--light-bg);
}

.filter-btn::before {
    content: '⚙️';
}

.export-btn::before {
    content: '📤';
}

/* ========================================
   FILTER BAR
   ======================================== */
.filter-bar {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
    background: var(--white);
    padding: 20px;
    border-radius: var(--radius);
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}

.filter-bar.is-hidden {
    display: none;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.filter-group label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
}

.filter-group input,
.filter-group select {
    padding: 8px 12px;
    font-size: 13px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--light-bg);
}

/* ========================================
   TABLE CONTAINER
   ======================================== */
.table-container {
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-md);
    overflow-x: auto;
}

#transactionsTable {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

#transactionsTable thead {
    background: var(--light-bg);
}

#transactionsTable th {
    padding: 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 12px;
    border-bottom: 2px solid var(--border-color);
}

#transactionsTable td {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-dark);
}

#transactionsTable tbody tr:hover {
    background: var(--light-bg);
}

#transactionsTable tbody tr:last-child td {
    border-bottom: none;
}

/* ========================================
   SCROLLBAR
   ======================================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

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