:root {
    /* Color Palette - Playful Purple & Rose */
    --primary: #8b5cf6;      /* Violet */
    --primary-hover: #7c3aed;
    --secondary: #f43f5e;    /* Rose */
    --secondary-hover: #e11d48;
    --accent: #f59e0b;       /* Amber */
    
    --bg-main: #f5f3ff;      /* Soft Violet White */
    --bg-surface: #ffffff;
    --bg-alt: #ede9fe;       /* Violet Tint */
    
    --text-primary: #1a192b; /* Deep Purple-Grey */
    --text-secondary: #45435b;/* Medium Purple-Grey */
    --text-muted: #828096;   /* Light Purple-Grey */
    
    --border-color: #ddd9f5; 
    --border-color-hover: #c9c3eb;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-section: 5rem;
    
    /* Typography */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
    --font-size-4xl: 3.5rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows (Softer Neumorphic Depth) */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.03);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.04), 0 2px 4px -2px rgb(0 0 0 / 0.04);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.06), 0 4px 6px -4px rgb(0 0 0 / 0.04);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.08), 0 8px 10px -6px rgb(0 0 0 / 0.04);
    --shadow-glow: 0 0 20px rgba(139, 92, 246, 0.4);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-main);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    opacity: 0;
    animation: fadeInPage 0.4s ease-out forwards;
}

body.fade-out {
    animation: fadeOutPage 0.3s ease-in forwards;
}

@keyframes fadeInPage {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeOutPage {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(-10px); }
}

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

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

ul {
    list-style: none;
}

img, svg {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-section) 0;
}

/* Typography Utilities */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: inherit;
    font-size: var(--font-size-base);
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--bg-surface);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-alt);
    border-color: var(--border-color-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Header & Navigation */
.site-header {
    background-color: var(--bg-surface);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 50;
    padding: var(--spacing-md) 0;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--primary);
}

.site-logo {
    height: 48px;
    width: auto;
    object-fit: contain;
}

.main-nav ul {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.main-nav a {
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    padding-bottom: var(--spacing-xs);
}

.main-nav a:hover, .main-nav a.active {
    color: var(--primary);
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: width var(--transition-base);
}

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

/* Mobile Menu Toggle */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    color: var(--text-primary);
    cursor: pointer;
}

/* Main Content Area */
.site-main {
    flex: 1;
}

/* Hero Section */
.hero {
    position: relative;
    background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-alt) 100%);
    padding: calc(var(--spacing-section) * 1.5) 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    overflow: hidden; /* Contains floating particles */
}

.hero .container {
    position: relative;
    z-index: 10;
}

.hero h1 {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    line-height: 1.1;
}

.hero p {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-cta .btn {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
    border-radius: var(--radius-full);
}

/* Floating Particles */
.particle {
    position: absolute;
    z-index: 1;
    opacity: 0.4;
    pointer-events: none;
    animation: float 20s infinite ease-in-out alternate;
}

.particle svg {
    width: 100%;
    height: 100%;
}

/* Particle Positions & Animations */
.p1 { top: 15%; left: 10%; width: 60px; color: var(--primary); animation-duration: 25s; animation-delay: 0s; }
.p2 { top: 70%; left: 5%; width: 40px; color: var(--secondary); animation-duration: 20s; animation-delay: -5s; }
.p3 { top: 20%; right: 15%; width: 50px; color: var(--accent); animation-duration: 22s; animation-delay: -2s; }
.p4 { bottom: 10%; right: 10%; width: 70px; color: var(--primary); animation-duration: 28s; animation-delay: -10s; }
.p5 { top: 50%; left: 25%; width: 30px; color: #ec4899; animation-duration: 18s; animation-delay: -7s; }
.p6 { top: 80%; right: 25%; width: 45px; color: #8b5cf6; animation-duration: 24s; animation-delay: -4s; }

@keyframes float {
    0% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(180deg); }
    100% { transform: translateY(0) rotate(360deg); }
}

/* Tools Cards Section */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.tool-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition-slow);
    position: relative;
    overflow: hidden;
}

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

.tool-card .icon-wrapper {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    background-color: var(--bg-alt);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    transition: background-color var(--transition-base), color var(--transition-base);
}

.tool-card:hover .icon-wrapper {
    background-color: var(--primary);
    color: white;
}

.tool-card .icon-wrapper svg {
    width: 32px;
    height: 32px;
}

.tool-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.tool-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    flex-grow: 1;
}

.tool-card .btn {
    width: 100%;
    transition: all var(--transition-base);
}

.tool-card:hover .btn {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
    box-shadow: 0 0 15px rgba(79, 70, 229, 0.4);
}

/* Featured Tool Cards */
.tool-card.featured {
    border: 2px solid transparent;
    background-image: linear-gradient(var(--bg-surface), var(--bg-surface)), 
                      linear-gradient(135deg, var(--primary), var(--secondary));
    background-origin: border-box;
    background-clip: padding-box, border-box;
    box-shadow: var(--shadow-md);
}

.tool-card.featured .icon-wrapper {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
}

.tool-card.featured:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-glow), var(--shadow-xl);
}

.featured-badge {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-sm);
}

/* Footer Section */
.site-footer {
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-2xl) 0 var(--spacing-md);
    margin-top: auto;
}

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

.footer-col h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.footer-col h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--primary);
    border-radius: var(--radius-full);
}

.footer-col p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-col ul a {
    color: var(--text-secondary);
    transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer-col ul a:hover {
    color: var(--primary);
    padding-left: var(--spacing-xs);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background-color: var(--bg-alt);
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.social-links a:hover {
    background-color: var(--primary);
    color: white;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Responsive Overrides */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .mobile-toggle {
        display: block;
    }

    .main-nav {
        display: none; /* simple toggle handled in JS */
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-surface);
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        border-top: 1px solid var(--border-color);
    }
    
    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .main-nav a {
        display: block;
        width: 100%;
        padding: var(--spacing-sm) 0;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .hero h1 {
        font-size: var(--font-size-2xl);
    }
    .hero p {
        font-size: var(--font-size-base);
    }
    .hero-cta {
        flex-direction: column;
    }
    .hero-cta .btn {
        width: 100%;
    }
}

/* --- JS Micro-Animations --- */

/* Material Ripple Effect */
.ripple {
    position: absolute;
    border-radius: 50%;
    transform: scale(0);
    animation: ripple-animation 600ms linear;
    background-color: rgba(255, 255, 255, 0.4);
    pointer-events: none;
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}