:root {
    /* Color Palette - Deep Ocean & Old Gold */
    --clr-bg: #0b101a;
    --clr-surface: #141c2b;
    --clr-surface-alt: #1c273a;
    --clr-gold: #cba153;
    --clr-gold-hover: #e0b868;
    --clr-gold-muted: rgba(203, 161, 83, 0.2);
    --clr-text: #e2e8f0;
    --clr-text-muted: #94a3b8;
    --clr-border: #2a374a;
    --clr-warning: #92400e;
    --clr-warning-bg: rgba(146, 64, 14, 0.1);

    /* Typography */
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    --font-heading: 'Georgia', 'Times New Roman', serif;
    
    /* Spacing & Layout */
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
    --container-max: 1100px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition: 0.3s ease-in-out;
}

/* =========================================
   Reset & Base Styles
   ========================================= */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--clr-bg);
    color: var(--clr-text);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--clr-gold);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    font-weight: normal;
}

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--clr-gold);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover, a:focus {
    color: var(--clr-gold-hover);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* =========================================
   Layout & Containers
   ========================================= */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    padding: var(--spacing-xl) 0;
}

.text-center {
    text-align: center;
}

.section-heading {
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
}

/* =========================================
   Components (Cards, Buttons, Forms)
   ========================================= */
.card {
    background-color: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    transition: transform var(--transition), box-shadow var(--transition);
}

.btn {
    display: inline-block;
    font-family: var(--font-primary);
    font-weight: 600;
    text-align: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: none;
    transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn-primary {
    background-color: var(--clr-gold);
    color: var(--clr-bg);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--clr-gold-hover);
    color: var(--clr-bg);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px var(--clr-gold-muted);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-full {
    width: 100%;
}

.form-group {
    margin-bottom: var(--spacing-md);
    text-align: left;
}

label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--clr-text-muted);
    font-size: 0.9rem;
}

input, textarea {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--clr-surface-alt);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-sm);
    color: var(--clr-text);
    font-family: var(--font-primary);
    transition: border-color var(--transition);
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--clr-gold);
}

/* =========================================
   Header & Navigation
   ========================================= */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(11, 16, 26, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--clr-border);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

.brand a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--clr-gold);
}

.brand-logo {
    height: 40px;
    width: auto;
}

.main-nav {
    display: none; /* Hidden on mobile by default */
}

.main-nav ul {
    display: flex;
    gap: var(--spacing-lg);
}

.main-nav a {
    color: var(--clr-text);
    font-weight: 500;
    font-size: 0.95rem;
}

.main-nav a:hover {
    color: var(--clr-gold);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--clr-gold);
    transition: var(--transition);
}

/* =========================================
   Hero Section
   ========================================= */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px; /* Offset for fixed header */
    text-align: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(to bottom, rgba(11, 16, 26, 0.7), var(--clr-bg)), url('images/dark-ocean-pirate-treasure-background.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-content h1 {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    margin-bottom: var(--spacing-md);
    text-shadow: 2px 4px 8px rgba(0, 0, 0, 0.8);
}

.hero-content p {
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    color: var(--clr-text);
    margin-bottom: var(--spacing-lg);
    text-shadow: 1px 2px 4px rgba(0, 0, 0, 0.8);
}

/* =========================================
   Game Section
   ========================================= */
.game-section {
    background-color: var(--clr-surface);
    border-top: 1px solid var(--clr-border);
    border-bottom: 1px solid var(--clr-border);
}

.game-container {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    aspect-ratio: 16 / 9;
    background-color: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 0 40px var(--clr-gold-muted);
    border: 2px solid var(--clr-border);
}

.game-container iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
}

/* =========================================
   About Section
   ========================================= */
.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    align-items: center;
}

.about-text p {
    color: var(--clr-text-muted);
}

.about-image-container {
    position: relative;
}

.about-img {
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    border: 1px solid var(--clr-border);
}

.features-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.feature-card {
    text-align: center;
    background-color: var(--clr-surface-alt);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--clr-gold);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--clr-text-muted);
    margin: 0;
}

/* =========================================
   Contact Section
   ========================================= */
.contact-form-container {
    max-width: 600px;
    margin: 0 auto;
}

/* =========================================
   Footer
   ========================================= */
.site-footer {
    background-color: var(--clr-surface);
    border-top: 1px solid var(--clr-border);
    padding-top: var(--spacing-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    color: var(--clr-text-muted);
    font-size: 0.9rem;
}

.site-footer h4 {
    color: var(--clr-text);
    font-family: var(--font-primary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.site-footer ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.site-footer li, .site-footer a {
    color: var(--clr-text-muted);
    font-size: 0.9rem;
}

.site-footer a:hover {
    color: var(--clr-gold);
}

.footer-bottom {
    text-align: center;
    padding: var(--spacing-md);
    border-top: 1px solid var(--clr-border);
    background-color: #080c13;
}

.footer-bottom p {
    margin: 0;
    color: var(--clr-text-muted);
    font-size: 0.85rem;
}

/* =========================================
   Subpage Content
   ========================================= */
.page-section {
    padding-top: 120px;
    padding-bottom: var(--spacing-xl);
    min-height: calc(100vh - 350px);
}

.page-content {
    max-width: 800px;
    margin: 0 auto;
}

.page-content h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--clr-border);
    padding-bottom: var(--spacing-sm);
}

.page-content h3 {
    font-size: 1.25rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--clr-text);
}

.page-content p {
    color: var(--clr-text-muted);
}

/* =========================================
   Media Queries (Mobile First -> Desktop)
   ========================================= */
@media (min-width: 768px) {
    /* Header */
    .menu-toggle {
        display: none;
    }
    
    .main-nav {
        display: block;
    }

    /* About Section */
    .about-grid {
        grid-template-columns: 1fr 1fr;
    }

    .features-row {
        grid-template-columns: repeat(3, 1fr);
    }

    /* Footer */
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

/* JS toggle fallback styling for mobile nav */
.main-nav.active {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--clr-surface);
    border-bottom: 1px solid var(--clr-border);
    padding: var(--spacing-md) 0;
    box-shadow: 0 10px 20px rgba(0,0,0,0.5);
}

.main-nav.active ul {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}