/* Global Styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    /* Dark gradient background */
    background: linear-gradient(135deg, #0d0d0d 0%, #1a1a1a 100%);
    color: #e0e0e0; /* Light Text */
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background-color: #000000; /* Black Header */
    /* Subtle gradient overlay on header */
    background-image: linear-gradient(to bottom, #000000, #111111);
    color: #39ff14; /* Neon Green Text */
    padding: 2rem 0;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
    border-bottom: 1px solid #39ff14;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    text-shadow: 0 0 10px rgba(57, 255, 20, 0.3); /* Soft glow */
}

nav ul {
    list-style: none;
    padding: 0;
    margin-top: 20px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

nav ul li {
    margin: 0 15px;
}

nav a {
    color: #39ff14; /* Neon Green Text */
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    padding: 5px 10px;
    border-radius: 4px;
}

nav a:hover {
    color: #000000;
    background-color: #39ff14; /* Invert on hover for interaction */
    text-shadow: none;
    box-shadow: 0 0 15px #39ff14;
}

/* Sections */
section {
    margin: 40px 0;
    padding: 30px;
    background: #1e1e1e; /* Dark Gray Card */
    /* Subtle gradient on cards */
    background: linear-gradient(to bottom right, #1e1e1e, #252525);
    border-radius: 12px; /* Softer corners */
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    border: 1px solid #333;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

section:hover {
    transform: translateY(-5px); /* Lift effect */
    box-shadow: 0 8px 25px rgba(0,0,0,0.4);
    border-color: #39ff14; /* Highlight border on hover */
}

h2 {
    color: #39ff14; /* Neon Green */
    border-bottom: 1px solid rgba(57, 255, 20, 0.3); /* Softer divider */
    padding-bottom: 15px;
    margin-top: 0;
}

/* Category Cards */
.category-card {
    border-left: 5px solid #39ff14; /* Neon Green Accent */
}

/* Video Placeholder */
.video-placeholder {
    background-color: #000;
    color: #fff;
    height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid #333;
}

/* Buttons */
.btn {
    display: inline-block;
    /* Gradient button */
    background: linear-gradient(45deg, #39ff14, #32cb10);
    color: #000000; /* Black Text */
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 25px; /* Pill shape is more welcoming */
    margin-top: 15px;
    font-weight: bold;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background: linear-gradient(45deg, #32cb10, #39ff14);
    box-shadow: 0 0 15px rgba(57, 255, 20, 0.6);
    transform: scale(1.05);
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 20px;
    background-color: #000000;
    background-image: linear-gradient(to top, #000000, #111111);
    color: #888; /* Softer text color */
    margin-top: 50px;
    border-top: 1px solid #333;
}

footer p {
    margin: 0;
}