:root {
    --primary-color: #00d4ff; /* Cyan/Neon Blue */
    --secondary-color: #008cb3;
    --accent-color: #ff0055; /* For highlights if needed */
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --section-bg-alt: #0a0a0a;
    --text-color: #e0e0e0;
    --text-muted: #b0b0b0;
    --white: #ffffff;
    --border-color: #333;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: var(--card-bg);
    box-shadow: 0 2px 10px rgba(0,0,0,0.5);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

nav ul {
    list-style: none;
    display: flex;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
    font-size: 0.95rem;
}

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

nav ul li a i {
    margin-right: 5px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364); /* Deep dark teal/blue gradient */
    color: var(--white);
    padding: 160px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* Add a subtle pattern overlay if desired */
.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(255,255,255,0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    color: #ddd;
}

.btn {
    display: inline-block;
    background: var(--primary-color);
    color: #000; /* Dark text on bright button */
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    border: 2px solid var(--primary-color);
}

.btn:hover {
    background: transparent;
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.4);
}

.btn i {
    margin-right: 8px;
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: #000;
}

/* Sections */
.section {
    padding: 80px 0;
}

.section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: var(--white);
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--primary-color);
    margin: 10px auto 0;
    border-radius: 2px;
}

.bg-alt {
    background-color: var(--section-bg-alt);
}

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

.feature-item {
    background: var(--card-bg);
    padding: 35px 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
    text-align: center;
}

.feature-item:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.icon-box {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 25px;
    height: 80px;
    width: 80px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    margin-right: auto;
}

.feature-item h3 {
    margin-bottom: 15px;
    color: var(--white);
    font-size: 1.3rem;
}

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

/* Pricing */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.pricing-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    text-align: center;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    transition: transform 0.3s;
}

.pricing-card:hover {
    transform: scale(1.02);
    border-color: var(--primary-color);
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--primary-color);
}

.os-icon {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    opacity: 0.3;
}

.pricing-card h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: var(--white);
}

.price {
    font-size: 2.5rem;
    color: var(--primary-color);
    font-weight: bold;
    margin-bottom: 30px;
    text-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
}

.requirements {
    list-style: none;
    text-align: left;
    margin-bottom: 30px;
    color: var(--text-muted);
}

.requirements li {
    margin-bottom: 12px;
    border-bottom: 1px solid #333;
    padding-bottom: 8px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
}

.requirements li i {
    width: 25px;
    color: var(--secondary-color);
    text-align: center;
    margin-right: 10px;
}

.requirements li strong {
    color: var(--text-color);
    margin-right: 5px;
}

.pricing-card .actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.notice {
    background: rgba(255, 193, 7, 0.1);
    border: 1px solid rgba(255, 193, 7, 0.3);
    padding: 25px;
    border-radius: 8px;
    margin-top: 30px;
    color: var(--text-color);
}

.notice h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: #ffc107;
    display: flex;
    align-items: center;
    gap: 10px;
}

.notice ul {
    list-style: none;
    margin-left: 0;
}

.notice ul li {
    margin-bottom: 10px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: var(--text-muted);
}

.notice ul li i {
    color: #ffc107;
    margin-top: 5px;
    font-size: 0.8rem;
}

.notice strong {
    color: var(--white);
}

/* Footer */
footer {
    background: #050505;
    color: var(--text-muted);
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid #222;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s;
}

footer a:hover {
    color: var(--white);
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        height: auto;
        padding: 15px;
    }

    nav ul {
        margin-top: 15px;
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }

    nav ul li {
        margin-left: 0;
    }
    
    .hero {
        padding: 140px 0 80px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }
    
    .pricing-card .actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
}