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

:root {
    /* Modern Student-Friendly Color Palette */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    --success-gradient: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    --warm-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --purple-pink: linear-gradient(135deg, #667eea 0%, #f093fb 100%);
    --blue-teal: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --orange-pink: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
    --green-blue: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    
    /* Fresh Color System */
    --primary-color: #6366f1;
    --secondary-color: #ec4899;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    /* Neutral Palette - Modern & Clean */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Student-Friendly Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Poppins', 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Modern Spacing System */
    --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 */
    
    /* Layout & Components */
    --container-max-width: 1200px;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    
    /* Enhanced Shadows - More Depth */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
    --shadow-colored: 0 10px 15px -3px rgba(99, 102, 241, 0.1), 0 4px 6px -2px rgba(99, 102, 241, 0.05);
    
    /* Smooth Transitions */
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Base Styles */
body {
    font-family: var(--font-primary);
    line-height: 1.7;
    color: var(--gray-700);
    background: linear-gradient(135deg, var(--gray-50) 0%, #fef7ff 50%, var(--gray-50) 100%);
    overflow-x: hidden;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

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

/* Enhanced Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--space-md);
    letter-spacing: -0.025em;
    color: var(--gray-800);
}

h1 { 
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 { 
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
}

h3 { 
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 600;
}

h4 { 
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    font-weight: 600;
}

p {
    margin-bottom: var(--space-lg);
    line-height: 1.7;
    color: var(--gray-600);
}

/* Enhanced Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px) saturate(180%);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    box-shadow: var(--shadow-lg);
    background: rgba(255, 255, 255, 0.98);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.5rem;
    text-decoration: none;
    transition: var(--transition-bounce);
}

.nav-brand:hover {
    transform: scale(1.05);
}

.nav-brand i {
    font-size: 2rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-brand span {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: var(--space-2xl);
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition-normal);
    position: relative;
    padding: var(--space-sm) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
    transform: translateX(-50%);
    border-radius: 2px;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover {
    color: var(--primary-color);
    transform: translateY(-2px);
}

.nav-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-color);
    padding: var(--space-sm);
    border-radius: var(--border-radius-md);
    transition: var(--transition-normal);
}

.nav-toggle:hover {
    background: var(--gray-100);
    transform: scale(1.1);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 var(--space-md);
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--space-3xl);
        transition: var(--transition-normal);
        box-shadow: var(--shadow-xl);
        gap: var(--space-xl);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        font-size: 1.25rem;
        padding: var(--space-lg) var(--space-xl);
        border-radius: var(--border-radius-lg);
        width: 250px;
        text-align: center;
        background: var(--gray-50);
        border: 2px solid transparent;
    }
    
    .nav-link:hover {
        background: var(--primary-color);
        color: white;
        transform: scale(1.05);
        border-color: var(--primary-color);
    }
    
    .nav-toggle {
        display: block;
    }
}

/* Enhanced Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border: none;
    border-radius: var(--border-radius-lg);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-bounce);
    font-family: var(--font-primary);
    text-align: center;
    min-height: 52px;
    position: relative;
    overflow: hidden;
    text-transform: none;
    letter-spacing: 0.025em;
    box-shadow: var(--shadow-md);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-3px) scale(1.02);
}

.btn:active {
    transform: translateY(-1px) scale(0.98);
}

.btn-primary {
    background: var(--primary-gradient);
    color: var(--white);
    box-shadow: var(--shadow-colored);
}

.btn-primary:hover {
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.btn-gradient {
    background: var(--warm-gradient);
    color: var(--white);
    box-shadow: 0 10px 15px -3px rgba(250, 112, 154, 0.3);
}

.btn-gradient:hover {
    box-shadow: 0 20px 25px -5px rgba(250, 112, 154, 0.4);
}

.btn-success {
    background: var(--blue-teal);
    color: var(--white);
    box-shadow: 0 10px 15px -3px rgba(6, 182, 212, 0.3);
}

.btn-success:hover {
    box-shadow: 0 20px 25px -5px rgba(6, 182, 212, 0.4);
}

/* Enhanced Hero Section */
.hero {
    margin-top: 80px;
    padding: var(--space-3xl) 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    overflow: hidden;
    position: relative;
    min-height: 70vh;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(255, 255, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Ccircle cx='30' cy='30' r='4'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.hero-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 900;
    margin-bottom: var(--space-lg);
    background: linear-gradient(45deg, #ffffff, #f8fafc, #ffffff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 3vw, 1.5rem);
    margin-bottom: var(--space-2xl);
    opacity: 0.95;
    line-height: 1.6;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero-img {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-2xl);
    animation: float 6s ease-in-out infinite;
    filter: brightness(1.05) contrast(1.05);
    border: 4px solid rgba(255, 255, 255, 0.2);
}

@keyframes float {
    0%, 100% { transform: translateY(0px) scale(1); }
    50% { transform: translateY(-15px) scale(1.02); }
}

@media (max-width: 768px) {
    .hero {
        padding: var(--space-2xl) 0;
        min-height: 60vh;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-xl);
    }
    
    .hero-buttons {
        justify-content: center;
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: 280px;
    }
}

/* Enhanced Section Styles */
section {
    padding: var(--space-3xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-lg);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary-gradient);
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    margin-bottom: var(--space-3xl);
    color: var(--gray-500);
    font-size: 1.25rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* Enhanced Quick Tools Section */
.quick-tools {
    background: var(--white);
    position: relative;
}

.quick-tools::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%236366f1' fill-opacity='0.02'%3E%3Cpath d='M20 20c0-5.5-4.5-10-10-10s-10 4.5-10 10 4.5 10 10 10 10-4.5 10-10zm10 0c0-5.5-4.5-10-10-10s-10 4.5-10 10 4.5 10 10 10 10-4.5 10-10z'/%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-2xl);
    margin-top: var(--space-3xl);
    position: relative;
}

.tool-card {
    background: var(--white);
    padding: var(--space-2xl);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition-bounce);
    border: 2px solid var(--gray-100);
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: var(--transition-normal);
    transform-origin: left;
}

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

.tool-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-2xl);
    border-color: var(--primary-color);
}

.tool-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
    transition: var(--transition-bounce);
    box-shadow: var(--shadow-lg);
}

.tool-card:hover .tool-icon {
    transform: scale(1.15) rotate(10deg);
    box-shadow: var(--shadow-xl);
}

.tool-card h3 {
    margin-bottom: var(--space-md);
    color: var(--gray-800);
    font-weight: 700;
    font-size: 1.375rem;
}

.tool-card p {
    color: var(--gray-500);
    margin-bottom: var(--space-xl);
    line-height: 1.6;
    font-size: 1rem;
}

.tool-link {
    background: var(--primary-gradient);
    color: var(--white);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-bounce);
    display: inline-block;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    font-size: 1rem;
}

.tool-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: var(--transition-slow);
}

.tool-link:hover::before {
    left: 100%;
}

.tool-link:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-xl);
}

/* ... keep existing code (credit cards, features, footer sections) the same ... */

/* Enhanced Credit Cards Section */
.credit-cards {
    background: linear-gradient(135deg, var(--gray-50) 0%, #fef7ff 100%);
    position: relative;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--space-2xl);
    margin-bottom: var(--space-3xl);
}

.credit-card {
    background: var(--white);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transition: var(--transition-bounce);
    border: 2px solid var(--gray-100);
    position: relative;
}

.credit-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition-normal);
}

.credit-card:hover::before {
    opacity: 1;
}

.credit-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-2xl);
    border-color: var(--primary-color);
}

.card-header {
    background: var(--primary-gradient);
    color: var(--white);
    padding: var(--space-2xl);
    text-align: center;
    position: relative;
}

.card-name {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.025em;
}

.card-tagline {
    opacity: 0.95;
    font-size: 1rem;
    font-weight: 400;
}

.card-body {
    padding: var(--space-2xl);
}

.card-benefits {
    list-style: none;
    margin-bottom: var(--space-xl);
}

.card-benefits li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    color: var(--gray-700);
    font-size: 1rem;
    line-height: 1.5;
}

.card-benefits i {
    color: var(--success-color);
    font-size: 1.125rem;
    margin-top: 2px;
    flex-shrink: 0;
}

.card-cta {
    width: 100%;
    background: var(--blue-teal);
    color: var(--white);
    border: none;
    padding: var(--space-lg);
    border-radius: var(--border-radius-lg);
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-bounce);
    text-decoration: none;
    display: inline-block;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.card-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: var(--transition-slow);
}

.card-cta:hover::before {
    left: 100%;
}

.card-cta:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

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

/* Enhanced Features Section */
.features {
    background: var(--white);
    position: relative;
}

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

.feature-item {
    text-align: center;
    padding: var(--space-2xl);
    transition: var(--transition-bounce);
    border-radius: var(--border-radius-lg);
    border: 2px solid transparent;
}

.feature-item:hover {
    transform: translateY(-5px);
    background: var(--gray-50);
    border-color: var(--gray-200);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
    border-radius: 50%;
    background: var(--orange-pink);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
    transition: var(--transition-bounce);
    box-shadow: var(--shadow-lg);
}

.feature-item:hover .feature-icon {
    transform: scale(1.1) rotate(-10deg);
    box-shadow: var(--shadow-xl);
}

.feature-item h3 {
    margin-bottom: var(--space-md);
    color: var(--gray-800);
    font-weight: 700;
    font-size: 1.25rem;
}

.feature-item p {
    color: var(--gray-500);
    line-height: 1.6;
}

/* Enhanced Footer */
.footer {
    background: var(--gray-800);
    color: var(--white);
    padding: var(--space-3xl) 0 var(--space-lg);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

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

.footer-brand .nav-brand {
    color: var(--white);
    margin-bottom: var(--space-md);
}

.footer-brand p {
    margin-top: var(--space-md);
    opacity: 0.9;
    font-size: 1rem;
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-2xl);
}

.footer-section h4 {
    margin-bottom: var(--space-lg);
    color: var(--white);
    font-weight: 700;
    font-size: 1.125rem;
}

.footer-section a {
    display: block;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    margin-bottom: var(--space-md);
    transition: var(--transition-normal);
    font-size: 1rem;
    padding: var(--space-xs) 0;
}

.footer-section a:hover {
    color: var(--white);
    transform: translateX(8px);
    padding-left: var(--space-sm);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-lg);
    text-align: center;
}

.footer-bottom p {
    margin-bottom: var(--space-sm);
    font-size: 0.9rem;
}

.affiliate-disclaimer {
    margin-top: var(--space-md);
    opacity: 0.7;
    font-size: 0.8rem;
}

/* Related Tools Section */
.related-tools {
    padding: var(--space-2xl) 0;
    background: var(--gray-50);
}

.related-tools h3 {
    text-align: center;
    margin-bottom: var(--space-xl);
    color: var(--gray-800);
    font-size: 1.75rem;
    font-weight: 700;
}

.tool-link-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: var(--white);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    color: var(--gray-700);
    transition: var(--transition-bounce);
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--gray-100);
}

.tool-link-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-lg);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.tool-link-card i {
    font-size: 2rem;
    color: var(--primary-color);
    transition: var(--transition-bounce);
}

.tool-link-card:hover i {
    transform: scale(1.2) rotate(10deg);
}

.tool-link-card span {
    font-weight: 600;
    font-size: 0.9rem;
}

/* Enhanced Loading Animation */
.loading {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid rgba(99, 102, 241, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

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

/* Utility Classes */
.text-center { text-align: center; }
.hidden { display: none !important; }

/* Responsive Design Enhancements */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .btn {
        padding: var(--space-md) var(--space-lg);
        font-size: 0.9rem;
        min-height: 48px;
    }
    
    .tools-grid,
    .cards-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        width: 100%;
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: 280px;
    }
    
    section {
        padding: var(--space-2xl) 0;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}

@media (max-width: 480px) {
    .tool-card,
    .credit-card {
        margin: 0 var(--space-sm);
    }
    
    .nav-container {
        padding: 0 var(--space-md);
    }
}

/* Accessibility Enhancements */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Enhanced Focus styles for accessibility */
.btn:focus,
.nav-link:focus,
.tool-link:focus,
.card-cta:focus {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .navbar,
    .footer {
        display: none;
    }
    
    .hero {
        margin-top: 0;
    }
    
    * {
        box-shadow: none !important;
    }
}