:root {
    --bg-color: #050505;
    --card-bg: #111111;
    --card-border: #222222;
    --text-main: #f0f0f0;
    --text-muted: #888888;
    --accent: #00e676; /* Neon Green */
    --accent-glow: rgba(0, 230, 118, 0.15);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

a {
    color: var(--text-main);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Navigation */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 5%;
    max-width: 1400px;
    margin: 0 auto;
    border-bottom: 1px solid var(--card-border);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    color: var(--accent);
    font-size: 1.8rem;
    line-height: 1;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}

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

/* Main Container */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 5%;
    min-height: calc(100vh - 200px);
}

/* Buttons */
.btn {
    display: inline-block;
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 0.6rem 1.5rem;
    border-radius: 4px;
    font-weight: 500;
    transition: all 0.2s ease;
    cursor: pointer;
}

.btn:hover {
    background: var(--accent);
    color: var(--bg-color);
    box-shadow: 0 0 15px var(--accent-glow);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 6rem 0;
    border: 1px solid var(--card-border);
    border-radius: 8px;
    background: linear-gradient(180deg, rgba(17,17,17,0) 0%, rgba(17,17,17,0.5) 100%);
    position: relative;
    overflow: hidden;
    margin-bottom: 4rem;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.5;
}

.hero h1 {
    font-size: 3rem;
    max-width: 800px;
    margin: 0 auto 1.5rem;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 2rem;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
    border-color: #333;
    transform: translateY(-2px);
}

.card-icon {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    display: inline-block;
    padding: 0.8rem;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--card-border);
    border-radius: 50%;
    color: var(--text-main);
}

.card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
}

.card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Lists */
.qual-list {
    list-style: none;
    margin-top: 1.5rem;
}

.qual-list li {
    margin-bottom: 1rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.qual-list li::before {
    content: '→';
    color: var(--accent);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header p {
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Utility */
.highlight {
    color: var(--accent);
}

/* Media Queries */
@media (max-width: 900px) {
    .grid-3, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .nav-links {
        display: none; /* Add a hamburger menu later if needed */
    }
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    .hero h1 {
        font-size: 2rem;
    }
}