/* Basic Reset and Body Styling */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #000000 0%, #1a1a1a 50%, #00FFFF 100%); /* Black, Dark Gray, Cyan Gradient */
    color: #e0e0e0; /* Off-white text color */
    display: flex;
    overflow: hidden; /* Prevent body scroll, content will scroll internally */
    height: 100vh;
    animation: gradientShift 15s ease infinite alternate; /* Animated background */
}

/* Keyframe animation for background gradient */
@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    100% { background-position: 100% 50%; }
}


/* Container for main layout */
.container {
    display: flex;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7); /* Semi-transparent overlay for content readability */
    box-shadow: 0 0 50px rgba(0, 255, 255, 0.3); /* Cyan glow */
}

/* Sidebar Styling */
.sidebar {
    width: 280px; /* Slightly wider sidebar */
    background-color: #0d0d0d;
    padding: 20px;
    box-shadow: 2px 0 20px rgba(0, 255, 255, 0.3); /* Cyan shadow */
    display: flex;
    flex-direction: column;
    position: relative;
    border-right: 1px solid rgba(0, 255, 255, 0.2); /* Cyan border */
}

.sidebar .logo h1 {
    font-size: 1.8em; /* Slightly larger logo text */
    color: #00FFFF; /* Cyan for logo */
    margin-bottom: 30px;
    text-align: center;
    padding-bottom: 15px;
    border-bottom: 2px solid #00FFFF; /* Cyan border */
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.7);
    animation: pulse 2s infinite alternate; /* Pulsing logo animation */
}

@keyframes pulse {
    0% { text-shadow: 0 0 5px rgba(0, 255, 255, 0.5); }
    100% { text-shadow: 0 0 20px rgba(0, 255, 255, 1); }
}

.nav-menu ul {
    list-style: none;
}

.nav-menu li {
    padding: 15px 20px; /* More padding */
    margin-bottom: 10px; /* More margin */
    cursor: pointer;
    border-radius: 8px; /* More rounded corners */
    transition: background-color 0.4s ease, transform 0.3s ease, color 0.4s ease, box-shadow 0.4s ease;
    display: flex;
    align-items: center;
    gap: 12px;
    background-color: #1a1a1a; /* Darker default item background */
    border: 1px solid rgba(0, 255, 255, 0.1); /* Subtle cyan border */
}

.nav-menu li:hover {
    background-color: rgba(0, 255, 255, 0.2); /* Cyan hover effect */
    transform: translateX(8px) scale(1.02); /* More pronounced hover animation */
    color: #ffffff;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.5); /* Cyan glow on hover */
}

.nav-menu li.active {
    background-color: #00FFFF; /* Cyan active item background */
    color: #000000; /* Black text for active item */
    font-weight: bold;
    box-shadow: 0 0 25px rgba(0, 255, 255, 0.7); /* Intense cyan glow for active */
    transform: translateX(5px); /* Slightly pushed right */
    border-color: #00FFFF;
}

/* Content Area Styling */
.content-area {
    flex-grow: 1;
    padding: 40px; /* More padding */
    overflow-y: auto;
    scroll-behavior: smooth;
    position: relative;
    background: linear-gradient(45deg, rgba(0, 0, 0, 0.8), rgba(26, 26, 26, 0.8)); /* Subtle gradient for content area */
}

.subscription-section {
    min-height: calc(100vh - 80px); /* Adjust min-height for new padding */
    padding-bottom: 60px;
    opacity: 0;
    transform: translateY(30px) scale(0.98); /* Start further down and slightly smaller */
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    position: absolute;
    width: calc(100% - 80px); /* Adjust width for new padding */
    top: 40px; /* Align with top padding */
    left: 40px; /* Align with left padding */
    visibility: hidden;
}

.subscription-section.active {
    opacity: 1;
    transform: translateY(0) scale(1);
    position: relative;
    visibility: visible;
    animation: fadeInScale 0.8s ease-out; /* Add entry animation for section */
}

@keyframes fadeInScale {
    from { opacity: 0; transform: translateY(50px) scale(0.9); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.subscription-section h2 {
    font-size: 3em; /* Larger heading */
    margin-bottom: 30px;
    color: #00FFFF; /* Cyan heading */
    text-shadow: 0 0 15px rgba(0, 255, 255, 0.5);
    border-bottom: 2px solid rgba(0, 255, 255, 0.3); /* Subtle cyan underline */
    padding-bottom: 10px;
}

.subscription-section p {
    font-size: 1.2em; /* Slightly larger paragraph text */
    line-height: 1.7;
    margin-bottom: 25px;
    color: #c0c0c0; /* Lighter gray for paragraphs */
}

.account-options {
    display: flex;
    gap: 40px; /* More space between cards */
    flex-wrap: wrap;
    margin-top: 40px;
}

.option-card {
    background: linear-gradient(135deg, #1f1f1f 0%, #2a2a2a 100%); /* Dark gradient for cards */
    border: 1px solid rgba(0, 255, 255, 0.3); /* Cyan border */
    border-radius: 12px; /* More rounded corners */
    padding: 30px; /* More padding */
    flex: 1;
    min-width: 300px; /* Slightly wider min-width */
    max-width: 450px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.4s ease, border-color 0.4s ease; /* Enhanced transition */
    position: relative; /* For button positioning */
    overflow: hidden; /* Hide anything overflowing */
}

.option-card:hover {
    transform: translateY(-10px) scale(1.03); /* More pronounced lift and scale */
    box-shadow: 0 12px 35px rgba(0, 255, 255, 0.4); /* Intense cyan glow on hover */
    border-color: #00FFFF; /* Solid cyan border on hover */
}

.option-card h3 {
    font-size: 1.6em; /* Larger heading */
    color: #00FFFF; /* Cyan for card headings */
    margin-bottom: 20px;
    text-shadow: 0 0 8px rgba(0, 255, 255, 0.3);
}

.option-card p {
    font-size: 1.3em; /* Larger price text */
    color: #ffffff;
    font-weight: bold;
    margin-bottom: 25px; /* Space before button */
}

/* Buy Button Styling */
.buy-button {
    background: linear-gradient(45deg, #00FFFF, #00B3B3); /* Cyan gradient button */
    color: #000000; /* Black text on button */
    border: none;
    padding: 15px 30px; /* Larger padding */
    border-radius: 50px; /* Pill shape */
    font-size: 1.1em;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 255, 255, 0.4);
    transition: background 0.4s ease, transform 0.2s ease, box-shadow 0.4s ease, color 0.2s ease;
    width: 100%; /* Make button full width of card */
    margin-top: auto; /* Push button to bottom if content varies */
    display: block; /* Ensure it takes full width */
}

.buy-button:hover {
    background: linear-gradient(45deg, #33FFFF, #00E6E6); /* Lighter cyan on hover */
    transform: translateY(-3px); /* Subtle lift */
    box-shadow: 0 8px 25px rgba(0, 255, 255, 0.6); /* More intense shadow on hover */
    color: #333333; /* Darker text on hover */
}

.buy-button:active {
    transform: translateY(0); /* Press effect */
    box-shadow: 0 2px 5px rgba(0, 255, 255, 0.3);
    background: #00CCCC; /* Solid darker cyan on click */
}

/* Scrollbar styling for webkit browsers */
.content-area::-webkit-scrollbar {
    width: 10px; /* Wider scrollbar */
}

.content-area::-webkit-scrollbar-track {
    background: #0d0d0d; /* Darker track */
    border-radius: 5px;
}

.content-area::-webkit-scrollbar-thumb {
    background-color: #00FFFF; /* Cyan scrollbar thumb */
    border-radius: 5px;
    border: 2px solid #1a1a1a; /* Border to match background */
}

.content-area::-webkit-scrollbar-thumb:hover {
    background-color: #33FFFF; /* Lighter cyan on hover */
}