/* CSS Variables for Theme Management */
:root {
    --primary-color: #3C2415;
    --secondary-color: #6F4E37;
    --accent-color: #A67B5B;
    --light-accent: #C4915C;
    --background-color: #F5EFE6;
    --text-color: #3C2415;
    --white: #FFFFFF;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --danger-color: #EF4444;
    --info-color: #3B82F6;
    --border-color: #D4C4B0;
    --shadow-color: rgba(60, 36, 21, 0.08);
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --header-height: 120px;
    --bottom-nav-height: 72px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    transition: var(--transition);
    padding-top: var(--header-height);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
    width: 100%;
}

/* ==================== HEADER STYLES ==================== */
.header {
    background-color: var(--white);
    color: var(--primary-color);
    padding: 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    box-shadow: 0 2px 12px var(--shadow-color);
    border-bottom: 1px solid var(--border-color);
    overflow: visible;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    gap: 1rem;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}
.black-bar {
position: fixed;
bottom: 0;
left: 0;
right: 0;
height: 30px;
background-color: #000000;
z-index: 1001;
}
.logo-img {
    width: 288px;
    height: 288px;
    object-fit: contain;
    flex-shrink: 0;
    position: relative;
    z-index: 1001;
}

.logo {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.3px;
    white-space: nowrap;
    margin: 0;
}

/* Desktop Navigation */
.desktop-nav {
    display: flex;
    gap: 4px;
}

.nav-btn {
    background: transparent;
    border: none;
    color: var(--secondary-color);
    padding: 8px 16px;
    cursor: pointer;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-btn .nav-icon {
    width: 18px;
    height: 18px;
    stroke-width: 2;
}

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

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


/* ==================== BOTTOM NAVIGATION ==================== */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background-color: var(--white);
    border-top: 1px solid var(--border-color);
    z-index: 1000;
    padding: 8px 0;
    padding-bottom: max(8px, env(safe-area-inset-bottom));
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 80px;
}

.bottom-nav-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    background: none;
    border: none;
    color: var(--secondary-color);
    opacity: 0.6;
    cursor: pointer;
    transition: var(--transition);
    padding: 4px;
    font-size: 0.625rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.bottom-nav-icon {
    width: 24px;
    height: 24px;
    stroke-width: 2;
}

.bottom-nav-btn.active {
    color: var(--primary-color);
    opacity: 1;
}

.bottom-nav-btn.active .bottom-nav-icon {
    stroke-width: 2.5;
}

/* ==================== MAIN CONTENT ==================== */
.main {
    min-height: calc(100vh - var(--header-height) - 60px);
    padding: 24px 0;
}

.section {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.section.active {
    display: block;
}

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

.section-title {
    font-size: 1.75rem;
    margin-bottom: 24px;
    color: var(--primary-color);
    text-align: center;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), var(--light-accent));
    margin: 12px auto 0;
    border-radius: 2px;
}

/* ==================== DASHBOARD STYLES ==================== */
.dashboard-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.summary-card {
    background: var(--white);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px var(--shadow-color);
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}

.summary-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--shadow-color);
}

.summary-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-sm);
    background: linear-gradient(135deg, var(--accent-color), var(--light-accent));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.summary-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--white);
}

.summary-icon.expense {
    background: linear-gradient(135deg, var(--warning-color), #FBBF24);
}

.summary-icon.balance {
    background: linear-gradient(135deg, var(--success-color), #34D399);
}

.summary-content {
    flex: 1;
    min-width: 0;
}

.summary-card h3 {
    color: var(--secondary-color);
    margin-bottom: 4px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.summary-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ==================== CATEGORIES GRID ==================== */
.categories-overview,
.alerts-section {
    margin-bottom: 32px;
}

.categories-overview h3,
.alerts-section h3 {
    color: var(--secondary-color);
    margin-bottom: 16px;
    font-size: 1rem;
    font-weight: 600;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.category-card {
    background: var(--white);
    padding: 16px;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px var(--shadow-color);
    transition: var(--transition);
}

.category-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--shadow-color);
}

.category-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.category-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-sm);
    background: var(--background-color);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.category-icon svg {
    width: 20px;
    height: 20px;
    stroke: var(--secondary-color);
}

.category-name {
    font-weight: 600;
    color: var(--primary-color);
    flex-grow: 1;
    margin-left: 12px;
    font-size: 0.9rem;
}

.category-amount {
    font-weight: 700;
    color: var(--secondary-color);
    font-size: 0.9rem;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background-color: var(--background-color);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--success-color), #34D399);
    transition: width 0.4s ease;
    border-radius: 3px;
}

.progress-fill.warning {
    background: linear-gradient(90deg, var(--warning-color), #FBBF24);
}

.progress-fill.danger {
    background: linear-gradient(90deg, var(--danger-color), #F87171);
}

.progress-text {
    font-size: 0.75rem;
    color: var(--secondary-color);
    text-align: center;
}

/* ==================== ALERTS SECTION ==================== */
.alerts-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.alert {
    padding: 16px;
    border-radius: var(--border-radius-sm);
    border-left: 4px solid;
    background-color: var(--white);
    box-shadow: 0 2px 8px var(--shadow-color);
    font-size: 0.875rem;
}

.alert.warning {
    border-left-color: var(--warning-color);
    background-color: #FEF3C7;
}

.alert.danger {
    border-left-color: var(--danger-color);
    background-color: #FEE2E2;
}

.alert.info {
    border-left-color: var(--info-color);
    background-color: #DBEAFE;
}

/* ==================== FORM STYLES ==================== */
.budget-form,
.expense-form {
    background: var(--white);
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px var(--shadow-color);
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--secondary-color);
    font-weight: 500;
    font-size: 0.875rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--white);
    color: var(--text-color);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(60, 36, 21, 0.08);
}

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

/* ==================== BUTTON STYLES ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 600;
    transition: var(--transition);
    text-align: center;
}

.btn-icon {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(60, 36, 21, 0.25);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--accent-color), var(--light-accent));
    color: var(--white);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(166, 123, 91, 0.25);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), #F87171);
    color: var(--white);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.25);
}

.form-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* ==================== BUDGET CATEGORIES ==================== */
.categories-budget h3 {
    color: var(--secondary-color);
    margin-bottom: 16px;
    font-size: 1rem;
    font-weight: 600;
}

.budget-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 12px;
}

.budget-category {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    background-color: var(--background-color);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.budget-category-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-sm);
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
}

.budget-category-icon svg {
    width: 20px;
    height: 20px;
    stroke: var(--secondary-color);
}

.budget-category-info {
    flex-grow: 1;
}

.budget-category-name {
    font-weight: 500;
    color: var(--primary-color);
    font-size: 0.875rem;
}

.budget-category input {
    width: 100px;
    padding: 8px 12px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    text-align: right;
    font-size: 0.875rem;
    transition: var(--transition);
}

.budget-category input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* ==================== EXPENSES LIST ==================== */
.expenses-list {
    background: var(--white);
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.expenses-list h3 {
    color: var(--secondary-color);
    margin-bottom: 16px;
    font-size: 1rem;
    font-weight: 600;
}

.expenses-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.expense-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    background-color: var(--background-color);
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    gap: 12px;
}

.expense-item:hover {
    background-color: #EDE5D8;
}

.expense-info {
    flex-grow: 1;
    min-width: 0;
}

.expense-description {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.expense-description svg {
    width: 18px;
    height: 18px;
    stroke: var(--secondary-color);
    flex-shrink: 0;
}

.expense-details {
    font-size: 0.75rem;
    color: var(--secondary-color);
}

.expense-amount {
    font-weight: 700;
    color: var(--primary-color);
    font-size: 1rem;
    white-space: nowrap;
}

.expense-actions {
    display: flex;
    gap: 8px;
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.75rem;
}

/* ==================== REPORTS SECTION ==================== */
.report-controls {
    display: flex;
    align-items: flex-end;
    gap: 16px;
    margin-bottom: 24px;
    background: var(--white);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.report-controls .form-group {
    margin-bottom: 0;
    flex: 1;
}

.report-content {
    display: none;
}

.report-content.active {
    display: block;
}

.report-summary {
    margin-bottom: 24px;
}

.report-summary h3,
.category-comparison h3 {
    color: var(--secondary-color);
    margin-bottom: 16px;
    font-size: 1rem;
    font-weight: 600;
}

.report-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.report-card {
    background: var(--white);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px var(--shadow-color);
    text-align: center;
}

.report-card h4 {
    color: var(--secondary-color);
    margin-bottom: 8px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.report-card .value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* Category Comparison */
.category-comparison {
    background: var(--white);
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.comparison-chart {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.comparison-item {
    display: flex;
    align-items: center;
    padding: 16px;
    background-color: var(--background-color);
    border-radius: var(--border-radius-sm);
}

.comparison-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-sm);
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 16px;
}

.comparison-icon svg {
    width: 20px;
    height: 20px;
    stroke: var(--secondary-color);
}

.comparison-info {
    flex-grow: 1;
}

.comparison-name {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.comparison-bars {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}

.comparison-bar {
    height: 24px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    color: var(--white);
    font-weight: 600;
    min-width: 60px;
    padding: 0 12px;
}

.comparison-bar.budget {
    background: linear-gradient(90deg, var(--info-color), #60A5FA);
}

.comparison-bar.expense {
    background: linear-gradient(90deg, var(--warning-color), #FBBF24);
}

.comparison-values {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--secondary-color);
    gap: 8px;
}

/* ==================== FOOTER ==================== */
.footer {
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
    padding: 16px 0;
    margin-top: 32px;
    margin-bottom: 60px;
}

.footer p {
    margin: 0;
    font-size: 0.875rem;
    opacity: 0.9;
}

/* ==================== LOADING AND ERROR STATES ==================== */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 32px;
    font-size: 1rem;
    color: var(--secondary-color);
}

.error {
    background-color: #FEE2E2;
    color: #991B1B;
    padding: 16px;
    border-radius: var(--border-radius-sm);
    border: 1px solid #FCA5A5;
    margin: 16px 0;
}

.success {
    background-color: #D1FAE5;
    color: #065F46;
    padding: 16px;
    border-radius: var(--border-radius-sm);
    border: 1px solid #6EE7B7;
    margin: 16px 0;
}

/* ==================== RESPONSIVE DESIGN ==================== */

/* Tablet and smaller screens */
@media (max-width: 1024px) {
    .report-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile devices */
@media (max-width: 768px) {
    :root {
        --header-height: 85px;
    }

    body {
        padding-bottom: var(--bottom-nav-height);
    }

    /* Hide desktop nav, show bottom nav */
    .desktop-nav {
        display: none;
    }

    .bottom-nav {
        display: flex;
    }

    .logo {
        font-size: 1rem;
    }

    .logo-img {
        width: 180px;
        height: 180px;
    }

    .header-controls {
        gap: 6px;
    }

    .theme-toggle,
    .lang-toggle {
        width: 36px;
        height: 36px;
    }

    .main {
        padding: 16px 0;
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: 20px;
    }

    .dashboard-summary {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .summary-card {
        padding: 16px;
    }

    .summary-icon {
        width: 40px;
        height: 40px;
    }

    .summary-icon svg {
        width: 20px;
        height: 20px;
    }

    .summary-value {
        font-size: 1.25rem;
    }

    .categories-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .budget-categories {
        grid-template-columns: 1fr;
    }

    .budget-form,
    .expense-form,
    .expenses-list,
    .category-comparison {
        padding: 16px;
    }

    .report-controls {
        flex-direction: column;
        align-items: stretch;
        padding: 16px;
    }

    .report-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .report-card {
        padding: 16px;
    }

    .report-card .value {
        font-size: 1.125rem;
    }

    .expense-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .expense-actions {
        width: 100%;
        justify-content: flex-end;
    }

    .comparison-bars {
        flex-direction: column;
    }

    .comparison-values {
        flex-direction: column;
        gap: 4px;
    }

    .footer {
        margin-bottom: 0;
        padding-bottom: calc(16px + var(--bottom-nav-height));
    }
}

/* Small mobile devices */
@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }

    .header-left {
        gap: 8px;
    }

    .summary-card {
        gap: 12px;
    }

    .budget-category {
        padding: 10px 12px;
    }

    .budget-category input {
        width: 80px;
        padding: 6px 10px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.875rem;
    }

    .report-cards {
        grid-template-columns: 1fr;
    }
}

/* ==================== ACCESSIBILITY ==================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
button:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --shadow-color: rgba(0, 0, 0, 0.3);
        --border-color: #000000;
    }
    
    .category-card,
    .summary-card,
    .expense-item {
        border: 2px solid var(--border-color);
    }
}

/* ==================== UTILITY CLASSES ==================== */
.text-center {
    text-align: center;
}

.text-success {
    color: var(--success-color) !important;
}

.text-warning {
    color: var(--warning-color) !important;
}

.text-danger {
    color: var(--danger-color) !important;
}

/* Hide on mobile/desktop helpers */
@media (max-width: 768px) {
    .hide-mobile {
        display: none !important;
    }
}

@media (min-width: 769px) {
    .hide-desktop {
        display: none !important;
    }
}