/* ===========================================
   Personal Finance Dashboard
   =========================================== */

/* Color Palette */
:root {
    /* Primary Green Palette */
    --color-light-green: #E8F5E8;
    --color-neon-green: #00FF7F;
    --color-dark-green: #006B3F;
    --color-black: #000000;
    --color-dark-gray: #1A1A1A;

    /* Supporting Colors */
    --color-white: #FFFFFF;
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-400: #9CA3AF;
    --color-gray-500: #6B7280;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;

    /* Status Colors */
    --color-success: var(--color-neon-green);
    --color-warning: #F59E0B;
    --color-error: #EF4444;
    --color-info: #3B82F6;

    /* Typography */
    --font-family-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --spacing-xs: 0.25rem;
    /* 4px */
    --spacing-sm: 0.5rem;
    /* 8px */
    --spacing-md: 1rem;
    /* 16px */
    --spacing-lg: 1.5rem;
    /* 24px */
    --spacing-xl: 2rem;
    /* 32px */
    --spacing-2xl: 3rem;
    /* 48px */
    --spacing-3xl: 4rem;
    /* 64px */

    /* Border Radius */
    --radius-sm: 0.375rem;
    /* 6px */
    --radius-md: 0.5rem;
    /* 8px */
    --radius-lg: 0.75rem;
    /* 12px */
    --radius-xl: 1rem;
    /* 16px */
    --radius-2xl: 1.5rem;
    /* 24px */

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* ===========================================
   Reset & Base Styles
   =========================================== */

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

body {
    font-family: var(--font-family-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-gray-900);
    background-color: var(--color-gray-50);
    overflow-x: hidden;
    max-width: 100vw;
}

/* Accessibility */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus States */
*:focus {
    outline: 2px solid var(--color-neon-green);
    outline-offset: 2px;
}

/* ===========================================
   Header & Navigation
   =========================================== */

.header {
    background: linear-gradient(135deg, var(--color-dark-green) 0%, var(--color-black) 100%);
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
}


.nav-brand .nav-title {
    color: var(--color-white);
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.025em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--color-gray-300);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-neon-green);
    background-color: rgba(0, 255, 127, 0.1);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 2px;
    background-color: var(--color-neon-green);
    border-radius: 1px;
}

/* ===========================================
   Main Layout
   =========================================== */

.main {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
    min-height: calc(100vh - 80px);
    width: 100%;
    overflow-x: hidden;
}

/* ===========================================
   Hero Section - Balance Overview
   =========================================== */

.hero-section {
    margin-bottom: var(--spacing-2xl);
}

.balance-card {
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-light-green) 100%);
    border: 2px solid var(--color-neon-green);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.balance-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 255, 127, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.balance-info {
    z-index: 1;
}

.balance-label {
    color: var(--color-gray-600);
    font-size: 1.125rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-sm);
}

.balance-amount {
    color: var(--color-dark-green);
    font-size: 3.5rem;
    font-weight: var(--font-weight-bold);
    line-height: 1;
    letter-spacing: -0.05em;
}

.balance-trend {
    text-align: right;
    z-index: 1;
}

.trend-indicator {
    display: inline-block;
    background-color: var(--color-success);
    color: var(--color-white);
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-sm);
}

.trend-indicator.negative {
    background-color: var(--color-error);
}

.trend-period {
    color: var(--color-gray-600);
    font-size: 0.875rem;
}

/* ===========================================
   Stats Section
   =========================================== */

.stats-section {
    margin-bottom: var(--spacing-2xl);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.stat-card {
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--color-neon-green);
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.stat-card.income {
    border-left-color: var(--color-success);
}

.stat-card.expense {
    border-left-color: var(--color-error);
}

.stat-card.savings {
    border-left-color: var(--color-info);
}

.stat-icon {
    font-size: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--color-light-green), var(--color-neon-green));
    border-radius: var(--radius-lg);
}

.stat-content {
    flex: 1;
}

.stat-label {
    color: var(--color-gray-600);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-amount {
    color: var(--color-gray-900);
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    line-height: 1;
}

/* ===========================================
   Actions Section
   =========================================== */

.actions-section {
    margin-bottom: var(--spacing-2xl);
}

.actions-section h2 {
    color: var(--color-gray-900);
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-lg);
}

.actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-xl);
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    background: linear-gradient(135deg, var(--color-neon-green) 0%, var(--color-dark-green) 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

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

.action-btn:active {
    transform: translateY(0);
}

.action-btn.secondary {
    background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-gray-200) 100%);
    color: var(--color-gray-900);
    border: 1px solid var(--color-gray-300);
}

.btn-icon {
    font-size: 1.25rem;
}

/* ===========================================
   Dashboard Grid
   =========================================== */

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

/* Section Headers */
.dashboard-grid h2 {
    color: var(--color-gray-900);
    font-size: 1.375rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-light-green);
}

/* ===========================================
   Categories Section
   =========================================== */

.categories-section {
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.categories-container {
    display: grid;
    gap: var(--spacing-md);
}

.category-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-light-green) 100%);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-fast);
}

.category-card:hover {
    border-color: var(--color-neon-green);
    transform: scale(1.02);
}

.category-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.category-icon {
    font-size: 1.5rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.category-name {
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
}

.category-amount {
    font-size: 1.125rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-dark-green);
}

/* ===========================================
   Charts Section
   =========================================== */

.charts-section {
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.chart-container {
    position: relative;
    height: 300px;
    margin-top: var(--spacing-lg);
}

/* ===========================================
   Recent Transactions
   =========================================== */

.recent-transactions {
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.transactions-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.transaction-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background-color: var(--color-gray-50);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-gray-300);
    transition: all var(--transition-fast);
}

.transaction-item:hover {
    background-color: var(--color-light-green);
    border-left-color: var(--color-neon-green);
}

.transaction-item.income {
    border-left-color: var(--color-success);
}

.transaction-item.expense {
    border-left-color: var(--color-error);
}

.transaction-details h4 {
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-xs);
}

.transaction-details p {
    font-size: 0.875rem;
    color: var(--color-gray-600);
}

.transaction-amount {
    font-size: 1.125rem;
    font-weight: var(--font-weight-bold);
}

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

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

.view-all-link {
    display: inline-flex;
    align-items: center;
    color: var(--color-neon-green);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.view-all-link:hover {
    color: var(--color-dark-green);
}

/* ===========================================
   Responsive Design
   =========================================== */

@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        gap: var(--spacing-md);
        padding: var(--spacing-md);
    }

    .nav-menu {
        gap: var(--spacing-md);
    }

    .main {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .balance-card {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .balance-amount {
        font-size: 2.5rem;
    }

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

    .dashboard-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

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