:root {
    --bg-color: #050a14;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-neon: #39ff14;
    /* Microbial Green */
    --accent-blue: #00f3ff;
    /* Cyan Lab Light */
    --glass-blur: blur(12px);
    --font-main: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Background Particle Container */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    background: radial-gradient(circle at 50% 50%, #0d1b2a 0%, #000000 100%);
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

header {
    text-align: center;
    padding: 4rem 0 2rem;
    margin-bottom: 2rem;
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-neon));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 20px rgba(57, 255, 20, 0.3);
    letter-spacing: -1px;
    animation: titleGlow 3s ease-in-out infinite alternate;
}

p.subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 1rem 0;
}

/* Card Styles - Glassmorphism */
.tool-card {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 300px;
    transform-style: preserve-3d;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg,
            transparent,
            rgba(255, 255, 255, 0.05),
            transparent);
    transition: 0.5s;
}

.tool-card:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: var(--accent-neon);
    box-shadow: 0 20px 40px rgba(57, 255, 20, 0.1);
}

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

.card-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--accent-blue);
    transition: color 0.3s ease;
}

.tool-card:hover .card-icon {
    color: var(--accent-neon);
    text-shadow: 0 0 15px var(--accent-neon);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
    flex-grow: 1;
}

.card-link-text {
    margin-top: 1.5rem;
    color: var(--accent-neon);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-link-text::after {
    content: '→';
    transition: transform 0.3s ease;
}

.tool-card:hover .card-link-text::after {
    transform: translateX(5px);
}

/* Animations */
@keyframes titleGlow {
    from {
        text-shadow: 0 0 20px rgba(57, 255, 20, 0.1);
    }

    to {
        text-shadow: 0 0 30px rgba(57, 255, 20, 0.4), 0 0 10px rgba(0, 243, 255, 0.2);
    }
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    .container {
        padding: 1rem;
    }
}