/* CSS Variables for easy management */
:root {
    --primary-color: #004e92;
    --secondary-color: #007bb5;
    --dark-bg: rgba(0, 0, 0, 0.8);
    --light-bg: rgba(255, 255, 255, 0.1);
    --text-color: #fff;
    --hover-bg: rgba(255, 255, 255, 0.2);
    --border-radius: 8px;
    --font-size-base: 1rem;
    --font-size-heading: 1.7rem;
    --font-size-subheading: 2rem;
    --font-size-large: 2.8rem;
    --transition-speed: 0.25s ease;
}

/* Global Styles */
html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #000428, #004e92);
    color: var(--text-color);
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
}

header {
    width: 100%;
    padding: 20px 25px;
    background: var(--dark-bg);
    border-bottom: 2px solid var(--primary-color);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    box-sizing: border-box;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

header h1 {
    margin: 0;
    font-size: var(--font-size-heading);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

/* Navigation Styles */
nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
    margin: 0;
    padding: 0;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-color);
    font-size: var(--font-size-base);
    padding: 10px 18px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color var(--transition-speed), transform var(--transition-speed);
    border-radius: var(--border-radius);
}

nav ul li a i {
    font-size: 1.3rem;
}

nav ul li a:hover {
    color: var(--secondary-color);
    transform: translateY(-3px);
}

/* Dropdown Styles */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: var(--dark-bg);
    min-width: 160px;
    box-shadow: 0px 8px 20px rgba(0, 0, 0, 0.3);
    z-index: 1;
    border-radius: var(--border-radius);
    margin-top: 10px;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-content a {
    color: var(--text-color);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    font-size: var(--font-size-base);
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    transition: background-color var(--transition-speed), padding-left var(--transition-speed);
}

.dropdown-content a:hover {
    background-color: var(--secondary-color);
    padding-left: 20px;
}

.dropdown a {
    color: var(--text-color);
    padding: 12px 20px;
    text-decoration: none;
    display: inline-block;
    font-size: var(--font-size-base);
    transition: color var(--transition-speed);
    border-radius: var(--border-radius);
}

.dropdown a:hover {
    color: var(--secondary-color);
}

/* Hero Section */
.hero {
    min-height: 60vh;
    background: url('https://source.unsplash.com/1600x900/?nature,landscape') center/cover no-repeat;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--text-color);
    padding: 40px 20px;
    margin-top: 90px; /* adjust for fixed header */
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

.hero h2 {
    font-size: var(--font-size-large);
    margin-bottom: 15px;
    text-shadow: 2px 2px 15px rgba(0, 0, 0, 0.6);
}

.hero p {
    font-size: 1.1rem;
    margin-bottom: 20px;
    font-weight: 300;
    letter-spacing: 0.5px;
}

.cta-button {
    padding: 12px 30px;
    font-size: 1rem;
    background: var(--primary-color);
    color: var(--text-color);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background var(--transition-speed), transform var(--transition-speed);
}

.cta-button:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

/* Content Section */
.content {
    flex: 1;
    padding: 50px 40px;
    background: var(--text-color);
    color: #000;
    text-align: center;
}

.content h3 {
    font-size: var(--font-size-subheading);
    margin-bottom: 20px;
    letter-spacing: 0.8px;
}

.content p {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 30px;
}

/* Features Section */
.features {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.feature {
    width: 30%;
    padding: 20px;
    background: #f9f9f9;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
}

.feature h4 {
    margin-top: 10px;
    font-size: 1.5rem;
}

.feature p {
    font-size: 1rem;
}

/* Footer */
footer {
    background: var(--dark-bg);
    color: var(--text-color);
    text-align: center;
    padding: 20px;
}

/* Frame Container */
.frame-container {
    flex-grow: 1;
    height: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: url('https://source.unsplash.com/1600x900/?space,stars') center/cover no-repeat;
    overflow: hidden;
}

#gameFrame {
    width: 100%;
    height: 100%;
    border: none;
    display: none;
}

#placeholder {
    color: var(--text-color);
    font-size: 1.5rem;
    text-align: center;
    padding: 20px;
}

/* Layout for the games section */
.container {
    display: flex;
    margin-top: 90px; /* height of fixed header */
    height: calc(100vh - 90px);
    overflow: hidden;
}

.games-list {
    width: 20%;
    background: var(--dark-bg);
    border-right: 2px solid var(--primary-color);
    overflow-y: auto;
    padding: 20px;
}

.games-list ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.games-list li {
    margin-bottom: 15px;
    cursor: pointer;
    padding: 15px;
    background: var(--light-bg);
    border-radius: 10px;
    text-align: center;
    font-size: 1.2rem;
    transition: background var(--transition-speed), transform var(--transition-speed);
}

.games-list li:hover {
    background: var(--hover-bg);
    transform: translateY(-3px);
}

/* Buttons */
.open-tab-button, .toggle-button {
    position: fixed;
    padding: 10px 20px;
    font-size: 1rem;
    background: var(--primary-color);
    color: var(--text-color);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    z-index: 1000;
    transition: background var(--transition-speed), transform var(--transition-speed);
}

.open-tab-button:hover, .toggle-button:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.open-tab-button {
    top: 20px;
    left: 20px;
}

.toggle-button {
    top: 20px;
    right: 20px;
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .games-list {
        width: 100%;
        height: auto;
    }

    .features {
        flex-direction: column;
        align-items: center;
    }

    .feature {
        width: 80%;
        margin-bottom: 20px;
    }

    .cta-button {
        font-size: 1rem;
        padding: 12px 25px;
    }
}