:root {
    --bg-dark: #0f172a;
    --card-bg: #1e293b;
    --accent-blue: #38bdf8;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    scroll-behavior: smooth;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid #334155;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--accent-blue);
}

nav a {
    color: var(--text-main);
    text-decoration: none;
    margin-left: 25px;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

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

nav .btn-sm {
    background-color: var(--accent-blue);
    color: var(--bg-dark);
    padding: 8px 16px;
    border-radius: 6px;
    font-weight: 600;
}

nav .btn-sm:hover {
    background-color: #7dd3fc;
}

.hero {
    padding: 160px 0 100px 0;
    text-align: center;
    background: radial-gradient(circle at top, rgba(56, 189, 248, 0.15), transparent 50%);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    max-width: 800px;
    margin: 0 auto 20px auto;
    letter-spacing: -1px;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 40px auto;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.btn {
    padding: 12px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--accent-blue);
    color: var(--bg-dark);
}

.btn-primary:hover {
    background-color: #7dd3fc;
    transform: translateY(-2px);
}

.btn-secondary {
    border: 1px solid #475569;
    color: var(--text-main);
}

.btn-secondary:hover {
    background-color: #1e293b;
    transform: translateY(-2px);
}

.features {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.2rem;
    margin-bottom: 15px;
}

.section-title p {
    color: var(--text-muted);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background-color: var(--card-bg);
    padding: 40px 30px;
    border-radius: 12px;
    border: 1px solid #334155;
    transition: border-color 0.2s ease;
}

.card:hover {
    border-color: var(--accent-blue);
}

.card .icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

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

footer {
    padding: 60px 0;
    border-top: 1px solid #334155;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

footer a {
    color: var(--accent-blue);
    text-decoration: none;
}

@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    nav { display: none; } /* Add a mobile menu via AI later if needed */
}