/*
==========================================
  WebChainer - Professional Web3 Domain Platform
  Version: 1.0.0
  Author: WebChainer Development Team
==========================================
*/

/* ==========================================
   ROOT VARIABLES & THEME CONFIGURATION
   ========================================== */

:root {
    /* Light Theme Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-elevated: #ffffff;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    --text-inverse: #ffffff;
    
    --border-light: #e2e8f0;
    --border-medium: #cbd5e1;
    --border-heavy: #94a3b8;
    
    --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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Brand Colors */
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #dbeafe;
    --primary-dark: #1e40af;
    
    --secondary: #7c3aed;
    --secondary-hover: #6d28d9;
    --secondary-light: #ede9fe;
    
    --accent: #06b6d4;
    --accent-hover: #0891b2;
    --accent-light: #cffafe;
    
    /* Status Colors */
    --success: #10b981;
    --success-light: #d1fae5;
    --success-dark: #059669;
    
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --warning-dark: #d97706;
    
    --error: #ef4444;
    --error-light: #fee2e2;
    --error-dark: #dc2626;
    
    --info: #3b82f6;
    --info-light: #dbeafe;
    --info-dark: #2563eb;
    
    /* Gradient Colors */
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #2563eb 100%);
    --gradient-accent: linear-gradient(135deg, #7c3aed 0%, #ec4899 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    /* Spacing Scale */
    --space-xs: 0.25rem;    /* 4px */
    --space-sm: 0.5rem;     /* 8px */
    --space-md: 1rem;       /* 16px */
    --space-lg: 1.5rem;     /* 24px */
    --space-xl: 2rem;       /* 32px */
    --space-2xl: 3rem;      /* 48px */
    --space-3xl: 4rem;      /* 64px */
    --space-4xl: 6rem;      /* 96px */
    
    /* 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 */
    --radius-full: 9999px;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Monaco', 'Courier New', monospace;
    
    --text-xs: 0.75rem;     /* 12px */
    --text-sm: 0.875rem;    /* 14px */
    --text-base: 1rem;      /* 16px */
    --text-lg: 1.125rem;    /* 18px */
    --text-xl: 1.25rem;     /* 20px */
    --text-2xl: 1.5rem;     /* 24px */
    --text-3xl: 1.875rem;   /* 30px */
    --text-4xl: 2.25rem;    /* 36px */
    --text-5xl: 3rem;       /* 48px */
    --text-6xl: 3.75rem;    /* 60px */
    --text-7xl: 4.5rem;     /* 72px */
    
    /* Z-Index Scale */
    --z-base: 1;
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-notification: 1080;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;
    --transition-slower: 500ms ease-in-out;
    
    /* Container Widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
    
    /* Header Height */
    --header-height: 80px;
    --header-height-mobile: 70px;
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    --bg-elevated: #334155;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --text-inverse: #0f172a;
    
    --border-light: #334155;
    --border-medium: #475569;
    --border-heavy: #64748b;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.5);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
    
    --primary-light: #1e3a8a;
    --secondary-light: #581c87;
    --accent-light: #164e63;
    --success-light: #065f46;
    --warning-light: #92400e;
    --error-light: #991b1b;
    --info-light: #1e40af;
}

/* ==========================================
   RESET & BASE STYLES
   ========================================== */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-base), color var(--transition-base);
    overflow-x: hidden;
    min-height: 100vh;
}

/* ==========================================
   TYPOGRAPHY
   ========================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

h1 {
    font-size: var(--text-5xl);
    font-weight: 800;
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--text-4xl);
    font-weight: 700;
}

h3 {
    font-size: var(--text-3xl);
    font-weight: 700;
}

h4 {
    font-size: var(--text-2xl);
    font-weight: 600;
}

h5 {
    font-size: var(--text-xl);
    font-weight: 600;
}

h6 {
    font-size: var(--text-lg);
    font-weight: 600;
}

p {
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

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

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

strong, b {
    font-weight: 600;
}

code, pre {
    font-family: var(--font-mono);
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 0.125rem 0.375rem;
    font-size: 0.9em;
}

pre {
    padding: var(--space-md);
    overflow-x: auto;
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */

.container {
    width: 100%;
    max-width: var(--container-xl);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-lg);
    padding-right: var(--space-lg);
}

.container-fluid {
    width: 100%;
    padding-left: var(--space-lg);
    padding-right: var(--space-lg);
}

.text-center {
    text-align: center;
}

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

.text-right {
    text-align: right;
}

.hidden {
    display: none !important;
}

.invisible {
    visibility: hidden;
}

.flex {
    display: flex;
}

.inline-flex {
    display: inline-flex;
}

.grid {
    display: grid;
}

.relative {
    position: relative;
}

.absolute {
    position: absolute;
}

.fixed {
    position: fixed;
}

.sticky {
    position: sticky;
}

/* ==========================================
   HEADER STYLES
   ========================================== */

.header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    z-index: var(--z-sticky);
    transition: all var(--transition-base);
    height: var(--header-height);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.9);
}

[data-theme="dark"] .header.scrolled {
    background-color: rgba(15, 23, 42, 0.9);
}

.header__container {
    max-width: var(--container-2xl);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-xl);
}

/* Logo Section */
.header__logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    text-decoration: none;
    transition: transform var(--transition-fast);
    flex-shrink: 0;
}

.header__logo:hover {
    transform: translateY(-2px);
}

.header__logo-image {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

.header__logo-text {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.header__logo-title {
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--primary);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    line-height: 1;
}

.header__logo-slogan {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* Navigation */
.header__nav {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav__item {
    position: relative;
}

.nav__link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    color: var(--text-primary);
    font-weight: 500;
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

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

.nav__link.active {
    background-color: var(--primary-light);
    color: var(--primary);
}

.nav__link-icon {
    font-size: var(--text-lg);
    transition: transform var(--transition-fast);
}

.nav__item:hover .nav__link-icon {
    transform: rotate(180deg);
}

/* Mega Menu */
.mega-menu {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 900px;
    max-width: 90vw;
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all var(--transition-base);
top: calc(100% + var(--space-sm));
margin-top: 0;
z-index: var(--z-dropdown);
    overflow: visible;
}


.mega-menu::before {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    top: calc(-1 * var(--space-sm));
    height: var(--space-sm);
}

.nav__item:hover .mega-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: all;
    transform: translateX(-50%) translateY(0);
}

.mega-menu__container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    background-color: var(--bg-card);
    border-radius: inherit;
    overflow: hidden;
    padding: var(--space-2xl);
}

.mega-menu__section {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.mega-menu__title {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xs);
}

.mega-menu__list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.mega-menu__link {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    color: var(--text-primary);
}

.mega-menu__link:hover {
    background-color: var(--bg-secondary);
    transform: translateX(4px);
}

.mega-menu__link-icon {
    font-size: var(--text-xl);
    color: var(--primary);
    margin-top: 2px;
    flex-shrink: 0;
}

.mega-menu__link-content {
    flex: 1;
}

.mega-menu__link-title {
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--text-primary);
    margin-bottom: 2px;
}

.mega-menu__link-desc {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    line-height: 1.4;
}



/* Header Actions */
.header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-shrink: 0;
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-light);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background-color: var(--primary);
    border-color: var(--primary);
    transform: scale(1.05);
}

.theme-toggle:hover .theme-toggle__icon {
    color: var(--text-inverse);
}

.theme-toggle__icon {
    font-size: var(--text-lg);
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

/* Wallet Button */
.wallet-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--gradient-primary);
    color: var(--text-inverse);
    font-weight: 600;
    font-size: var(--text-sm);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
    white-space: nowrap;
}

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

.wallet-button__icon {
    font-size: var(--text-lg);
}

.wallet-button--connected {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-medium);
}

.wallet-button--connected:hover {
    background: var(--bg-tertiary);
}

.wallet-address {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--text-primary);
}

.mobile-menu-toggle__icon {
    font-size: var(--text-2xl);
}

/* ==========================================
   HERO SECTION
   ========================================== */

.hero {
    position: relative;
    padding: var(--space-4xl) 0;
    overflow: hidden;
    background: var(--gradient-hero);
    color: var(--text-inverse);
}

[data-theme="dark"] .hero {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero__container {
    position: relative;
    z-index: 1;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.hero__content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero__title {
    font-size: var(--text-6xl);
    font-weight: 900;
    color: var(--text-inverse);
    margin-bottom: var(--space-lg);
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.hero__subtitle {
    font-size: var(--text-xl);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-2xl);
    line-height: 1.6;
    font-weight: 400;
}

.hero__search {
    max-width: 700px;
    margin: 0 auto var(--space-xl);
}

.search-box {
    display: flex;
    gap: var(--space-sm);
    background-color: var(--bg-card);
    border-radius: var(--radius-2xl);
    padding: var(--space-xs);
    box-shadow: var(--shadow-2xl);
    border: 1px solid var(--border-light);
}

.search-box__input-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}

.search-box__icon {
    position: absolute;
    left: var(--space-lg);
    color: var(--text-tertiary);
    font-size: var(--text-xl);
    pointer-events: none;
}

.search-box__input {
    flex: 1;
    padding: var(--space-md) var(--space-lg) var(--space-md) 3.5rem;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: var(--text-lg);
    font-weight: 500;
    outline: none;
}

.search-box__input::placeholder {
    color: var(--text-tertiary);
}

.search-box__select {
    padding: var(--space-md) var(--space-lg);
    border: none;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: var(--text-base);
    font-weight: 600;
    border-radius: var(--radius-xl);
    cursor: pointer;
    outline: none;
    transition: all var(--transition-fast);
}

.search-box__select:hover {
    background: var(--bg-tertiary);
}

.search-box__button {
    padding: var(--space-md) var(--space-2xl);
    background: var(--gradient-primary);
    color: var(--text-inverse);
    font-size: var(--text-base);
    font-weight: 700;
    border: none;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
    white-space: nowrap;
}

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

.hero__stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    margin-top: var(--space-3xl);
}

.stat-card {
    text-align: center;
    padding: var(--space-lg);
}

.stat-card__value {
    font-size: var(--text-4xl);
    font-weight: 900;
    color: var(--text-inverse);
    margin-bottom: var(--space-xs);
}

.stat-card__label {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

/* ==========================================
   FEATURES SECTION
   ========================================== */

.features {
    padding: var(--space-4xl) 0;
    background-color: var(--bg-secondary);
}

.features__header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.features__badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--primary-light);
    color: var(--primary);
    font-size: var(--text-sm);
    font-weight: 700;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.features__title {
    font-size: var(--text-4xl);
    font-weight: 800;
    margin-bottom: var(--space-md);
}

.features__description {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-2xl);
}

.feature-card {
    padding: var(--space-2xl);
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card__icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-3xl);
    color: var(--text-inverse);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-md);
}

.feature-card__title {
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.feature-card__description {
    font-size: var(--text-base);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
}

.feature-card__link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--primary);
    font-weight: 600;
    font-size: var(--text-sm);
    transition: gap var(--transition-fast);
}

.feature-card__link:hover {
    gap: var(--space-sm);
}

/* ==========================================
   SERVICES SECTION
   ========================================== */

.services {
    padding: var(--space-4xl) 0;
    background-color: var(--bg-primary);
}

.services__container {
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.services__header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--secondary-light);
    color: var(--secondary);
    font-size: var(--text-sm);
    font-weight: 700;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-title {
    font-size: var(--text-5xl);
    font-weight: 800;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.section-description {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-xl);
    margin-top: var(--space-3xl);
}

.service-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    padding: var(--space-2xl);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.service-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.service-card:hover::after {
    opacity: 1;
}

.service-card__header {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
    position: relative;
    z-index: 1;
}

.service-card__icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-3xl);
    color: var(--text-inverse);
    box-shadow: var(--shadow-lg);
    flex-shrink: 0;
}

.service-card__title-wrapper {
    flex: 1;
}

.service-card__title {
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.service-card__subtitle {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    font-weight: 500;
}

.service-card__description {
    font-size: var(--text-base);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
    position: relative;
    z-index: 1;
}

.service-card__features {
    list-style: none;
    margin-bottom: var(--space-lg);
    position: relative;
    z-index: 1;
}

.service-card__feature {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    color: var(--text-secondary);
    font-size: var(--text-sm);
}

.service-card__feature-icon {
    color: var(--success);
    font-size: var(--text-lg);
    flex-shrink: 0;
}

.service-card__button {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: var(--gradient-primary);
    color: var(--text-inverse);
    font-weight: 600;
    font-size: var(--text-base);
    border: none;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    z-index: 1;
}

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

/* ==========================================
   WHY WEBCHAINER SECTION
   ========================================== */

.why-webchainer {
    padding: var(--space-4xl) 0;
    background: var(--gradient-hero);
    color: var(--text-inverse);
    position: relative;
    overflow: hidden;
}

[data-theme="dark"] .why-webchainer {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

.why-webchainer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 90% 80%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.why-webchainer__container {
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    position: relative;
    z-index: 1;
}

.why-webchainer__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.why-webchainer__text {
    padding-right: var(--space-2xl);
}

.why-webchainer__title {
    font-size: var(--text-5xl);
    font-weight: 900;
    color: var(--text-inverse);
    margin-bottom: var(--space-lg);
    line-height: 1.2;
}

.why-webchainer__description {
    font-size: var(--text-lg);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-2xl);
    line-height: 1.7;
}

.why-webchainer__list {
    list-style: none;
    margin-bottom: var(--space-2xl);
}

.why-webchainer__item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.why-webchainer__item:last-child {
    border-bottom: none;
}

.why-webchainer__item-icon {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: var(--text-xl);
    flex-shrink: 0;
}

.why-webchainer__item-content h4 {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-inverse);
    margin-bottom: var(--space-xs);
}

.why-webchainer__item-content p {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.why-webchainer__visual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

.visual-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-2xl);
    padding: var(--space-xl);
    text-align: center;
    transition: all var(--transition-base);
}

.visual-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.15);
}

.visual-card__icon {
    font-size: var(--text-5xl);
    margin-bottom: var(--space-md);
}

.visual-card__value {
    font-size: var(--text-4xl);
    font-weight: 900;
    color: var(--text-inverse);
    margin-bottom: var(--space-xs);
}

.visual-card__label {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

/* ==========================================
   CTA SECTION
   ========================================== */

.cta {
    padding: var(--space-4xl) 0;
    background-color: var(--bg-secondary);
}

.cta__container {
    max-width: var(--container-lg);
    margin: 0 auto;
    padding: var(--space-3xl);
    background: var(--gradient-primary);
    border-radius: var(--radius-2xl);
    text-align: center;
    box-shadow: var(--shadow-2xl);
    position: relative;
    overflow: hidden;
}

.cta__container::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.cta__content {
    position: relative;
    z-index: 1;
}

.cta__title {
    font-size: var(--text-4xl);
    font-weight: 900;
    color: var(--text-inverse);
    margin-bottom: var(--space-md);
}

.cta__description {
    font-size: var(--text-lg);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta__buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-2xl);
    font-size: var(--text-base);
    font-weight: 700;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
    text-decoration: none;
    white-space: nowrap;
}

.btn--primary {
    background-color: var(--text-inverse);
    color: var(--primary);
    box-shadow: var(--shadow-lg);
}

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

.btn--outline {
    background-color: transparent;
    color: var(--text-inverse);
    border-color: var(--text-inverse);
}

.btn--outline:hover {
    background-color: var(--text-inverse);
    color: var(--primary);
}

/* ==========================================
   FOOTER
   ========================================== */

.footer {
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-light);
    padding-top: var(--space-4xl);
}

.footer__main {
    max-width: var(--container-2xl);
    margin: 0 auto;
    padding: 0 var(--space-xl) var(--space-3xl);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

.footer__brand {
    padding-right: var(--space-xl);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.footer__logo-image {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

.footer__logo-text {
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--primary);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer__description {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
}

.footer__social {
    display: flex;
    gap: var(--space-sm);
}

.social-link {
    width: 40px;
    height: 40px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--gradient-primary);
    color: var(--text-inverse);
    transform: translateY(-2px);
    border-color: transparent;
}

.footer__section-title {
    font-size: var(--text-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
}

.footer__links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer__link {
    color: var(--text-secondary);
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
    display: inline-block;
}

.footer__link:hover {
    color: var(--primary);
    transform: translateX(4px);
}

.footer__bottom {
    border-top: 1px solid var(--border-light);
    padding: var(--space-xl) var(--space-xl);
}

.footer__bottom-content {
    max-width: var(--container-2xl);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer__copyright {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.footer__legal {
    display: flex;
    gap: var(--space-lg);
}

.footer__legal-link {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

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

/* ==========================================
   MODALS & OVERLAYS
   ========================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal-backdrop);
    padding: var(--space-lg);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
}

.modal {
    background-color: var(--bg-card);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal__header {
    padding: var(--space-xl);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal__title {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--text-primary);
}

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

.modal__close:hover {
    background-color: var(--error);
    color: var(--text-inverse);
}

.modal__body {
    padding: var(--space-xl);
}

.modal__footer {
    padding: var(--space-xl);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: var(--space-md);
    justify-content: flex-end;
}

/* ==========================================
   NOTIFICATIONS
   ========================================== */

.notification {
    position: fixed;
    top: var(--space-xl);
    right: var(--space-xl);
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    box-shadow: var(--shadow-xl);
    max-width: 400px;
    z-index: var(--z-notification);
    animation: slideInRight 0.3s ease-out;
    display: flex;
    gap: var(--space-md);
}

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

.notification__icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xl);
    flex-shrink: 0;
}

.notification--success .notification__icon {
    background-color: var(--success-light);
    color: var(--success);
}

.notification--error .notification__icon {
    background-color: var(--error-light);
    color: var(--error);
}

.notification--warning .notification__icon {
    background-color: var(--warning-light);
    color: var(--warning);
}

.notification--info .notification__icon {
    background-color: var(--info-light);
    color: var(--info);
}

.notification__content {
    flex: 1;
}

.notification__title {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.notification__message {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

/* ==========================================
   RESPONSIVE DESIGN - TABLET
   ========================================== */

@media (max-width: 1024px) {
    :root {
        --header-height: 70px;
    }
    
    .header__container {
        padding: 0 var(--space-lg);
    }
    
    .mega-menu__container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero__title {
        font-size: var(--text-5xl);
    }
    
    .hero__stats {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-lg);
    }
    
    .features__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .why-webchainer__content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .why-webchainer__text {
        padding-right: 0;
    }
    
    .footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer__brand {
        grid-column: 1 / -1;
        padding-right: 0;
    }
}

/* ==========================================
   RESPONSIVE DESIGN - MOBILE
   ========================================== */

@media (max-width: 768px) {
    /* 1. Root Variable Adjustments */
    :root {
        --text-6xl: 2.5rem;
        --text-5xl: 2rem;
        --text-4xl: 1.75rem;
        --text-3xl: 1.5rem;
        --header-height: var(--header-height-mobile);
    }
    
    .container {
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }
    
    /* 2. Header & Navigation Logic */
    .header__nav {
        position: fixed;
        top: var(--header-height-mobile);
        left: 0;
        right: 0;
        /* محاسبه دقیق ارتفاع برای پر کردن صفحه موبایل */
        height: calc(100dvh - var(--header-height-mobile));
        background-color: var(--bg-card);
        
        display: flex;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        
        padding: var(--space-lg);
        padding-bottom: 100px; /* فضای خالی پایین برای اسکرول راحت */
        
        transform: translateX(-100%); /* پیش‌فرض مخفی */
        transition: transform var(--transition-base);
        
        overflow-y: auto; /* فعال کردن اسکرول داخلی */
        z-index: var(--z-fixed);
    }
    
    /* کلاسی که JS اضافه می‌کند برای باز کردن منو */
    .header__nav.active {
        transform: translateX(0);
    }

    /* حذف اسکرول‌بار زشت در منو */
    .header__nav::-webkit-scrollbar {
        width: 0px;
        background: transparent;
    }
    
    .nav__menu {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-sm);
        width: 100%;
        margin: 0;
        padding: 0;
    }

    .nav__item {
        width: 100%;
        position: relative;
    }
    
    .nav__link {
        width: 100%;
        padding: var(--space-md);
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    /* غیرفعال کردن افکت هاور دسکتاپ */
    .nav__item:hover .nav__link-icon { transform: none; }
    
    /* چرخش فلش فقط زمانی که کلاس is-open توسط JS اضافه شود */
    .nav__item.is-open .nav__link-icon { transform: rotate(180deg); }
    
    /* 3. Mega Menu (Accordion Style) */
    .mega-menu {
        position: static; /* در موبایل شناور نیست */
        transform: none;
        width: 100%;
        max-width: 100%;
        margin-top: 0;
        
        box-shadow: none;
        border: none;
        border-left: 2px solid var(--border-light);
        border-radius: 0;
        background: transparent;
        
        /* حالت پیش‌فرض بسته */
        display: none;
        opacity: 0;
        visibility: hidden;
        padding: 0;
        transition: none; /* حذف ترنزیشن دسکتاپ */
    }

    .mega-menu::before {
        display: none; /* حذف فلش بالای منو */
    }
    
    /* حالت باز شده (کلاس is-open از جاوااسکریپت) */
    .nav__item.is-open .mega-menu {
        display: block;
        opacity: 1;
        visibility: visible;
        padding-left: var(--space-md);
        margin-bottom: var(--space-md);
        animation: slideInLeft 0.3s ease;
    }
    
    .mega-menu__container {
        display: grid;
        grid-template-columns: 1fr;
        gap: var(--space-md);
        padding: var(--space-sm) 0;
        background: transparent;
    }

    .mega-menu__section {
        gap: var(--space-sm);
    }
    
    /* 4. Header Actions & Toggle */
    .mobile-menu-toggle {
        display: flex;
        z-index: 101; /* بالاتر از همه چیز */
    }
    
    .header__actions {
        gap: var(--space-sm);
        margin-right: var(--space-xs);
    }
    
    .wallet-button {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--text-xs);
    }
    
    .wallet-button__text {
        display: none; /* مخفی کردن متن دکمه ولت در موبایل */
    }
    
    /* 5. General Layout Adjustments (1 Column) */
    .hero { padding: var(--space-3xl) 0; }
    .hero__title { font-size: var(--text-4xl); margin-bottom: var(--space-md); }
    .hero__subtitle { font-size: var(--text-lg); }
    
    .search-box { flex-direction: column; }
    .search-box__input { padding: var(--space-md) var(--space-lg) var(--space-md) 3.5rem; }
    .search-box__select, .search-box__button { width: 100%; padding: var(--space-md); border-radius: var(--radius-xl); }
    
    /* تبدیل تمام گریدها به تک ستون */
    .hero__stats, 
    .features__grid, 
    .services__grid, 
    .why-webchainer__visual, 
    .footer__grid,
    .why-webchainer__content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .why-webchainer__text { padding-right: 0; }
    
    /* 6. Footer Adjustments */
    .footer__bottom-content {
        flex-direction: column;
        text-align: center;
        gap: var(--space-md);
    }
    
    .footer__legal {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    /* 7. CTA & Buttons */
    .cta__buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn { 
        width: 100%; 
        justify-content: center; 
    }
    
    /* 8. Notification Fix */
    .notification {
        left: var(--space-md);
        right: var(--space-md);
        width: auto;
        max-width: none;
        bottom: auto;
    }
}
/* ==========================================
   ANIMATIONS & EFFECTS
   ========================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-scale-in {
    animation: scaleIn 0.4s ease-out;
}

.animate-slide-in-left {
    animation: slideInLeft 0.5s ease-out;
}

/* ==========================================
   LOADING STATES
   ========================================== */

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-secondary) 0%,
        var(--bg-tertiary) 50%,
        var(--bg-secondary) 100%
    );
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
    border-radius: var(--radius-md);
}

/* ==========================================
   ACCESSIBILITY
   ========================================== */

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

.focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}
/* ==========================================
   NEW JS COMPONENTS STYLES
   ========================================== */

/* 1. Back to Top Button Styling */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--text-inverse);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    z-index: var(--z-fixed);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* 2. Preloader Styling (Optional if you add preloader HTML) */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-primary);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

/* 3. Global Focus State (Accessibility) */
*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}
/* ==========================================
   PRINT STYLES
   ========================================== */

@media print {
    .header,
    .footer,
    .mobile-menu-toggle,
    .theme-toggle,
    .wallet-button,
    .cta {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    a {
        text-decoration: underline;
    }
}