:root {
    --bg-color: #0f1117;
    --bg-alt: #161922;
    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    --accent: #bd93f9;
    --accent-hover: #ff79c6;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.08);
    
    /* Adjusted "grounded" accent colors */
    --accent-primary: #8b5cf6; /* subtle violet */
    --accent-secondary: #0ea5e9; /* subtle sky blue */
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: 'Playfair Display', serif;
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

a {
    color: var(--accent-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--text-main);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 6rem 0;
}

.bg-alt {
    background-color: var(--bg-alt);
    border-top: 1px solid var(--card-border);
    border-bottom: 1px solid var(--card-border);
}

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

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(14, 165, 233, 0.1) 0%, transparent 50%),
                linear-gradient(to bottom, transparent 0%, var(--bg-color) 100%);
    z-index: 1;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: url("assets/great_pyramid.jpg");
    background-size: cover;
    background-position: center;
    opacity: 0.15;
    z-index: 0;
    filter: grayscale(80%) contrast(1.2);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 2rem;
}

.tagline {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--accent-secondary);
    margin-bottom: 1rem;
    font-weight: 600;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    text-shadow: 0 4px 20px rgba(0,0,0,0.5);
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    font-weight: 600;
    border-radius: 4px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn:hover {
    background-color: var(--card-border);
    border-color: var(--text-muted);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

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

/* Images */
.image-wrapper {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

.image-wrapper::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    border: 1px solid var(--card-border);
    border-radius: 8px;
    z-index: 2;
    pointer-events: none;
}

.rounded-img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
    transition: transform 0.5s ease;
    filter: grayscale(30%);
}

.image-wrapper:hover .rounded-img {
    transform: scale(1.03);
    filter: grayscale(0%);
}

.caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
    color: var(--text-main);
    font-size: 0.9rem;
    z-index: 2;
}

.caption small {
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Cards Grid */
.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 0.5rem;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 4rem;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 2rem;
    border-radius: 8px;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease, background 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-secondary), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
}

.card:hover::before {
    opacity: 1;
}

.card-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--accent-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Playfair Display', serif;
    font-size: 1.2rem;
    color: var(--accent-secondary);
    margin-bottom: 1.5rem;
}

.card h3 {
    font-size: 1.25rem;
}

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

/* Tabs */
.tabs-container {
    margin-top: 3rem;
}

.tab-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 1rem;
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.1rem;
    font-family: 'Playfair Display', serif;
    cursor: pointer;
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
    border-radius: 4px;
}

.tab-btn:hover {
    color: var(--text-main);
    background: var(--card-bg);
}

.tab-btn.active {
    color: var(--accent-secondary);
    background: var(--card-bg);
    border: 1px solid var(--card-border);
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease forwards;
}

.tab-content.active {
    display: block;
}

.tab-content h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-main);
}

.tab-content p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

/* Lists & Callouts */
.predictions-list {
    list-style: none;
    margin-top: 2rem;
}

.predictions-list li {
    padding: 1rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    margin-bottom: 1rem;
    border-radius: 4px;
    color: var(--text-muted);
    position: relative;
    padding-left: 3rem;
}

.predictions-list li::before {
    content: '→';
    position: absolute;
    left: 1.25rem;
    color: var(--accent-secondary);
    font-weight: bold;
}

.predictions-list li strong {
    color: var(--text-main);
}

.callout {
    background: rgba(14, 165, 233, 0.05);
    border: 1px solid rgba(14, 165, 233, 0.2);
    padding: 3rem;
    border-radius: 8px;
    text-align: center;
}

.callout h3 {
    font-size: 1.8rem;
}

.callout p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

/* Footer */
footer {
    padding: 3rem 0;
    border-top: 1px solid var(--card-border);
    margin-top: 4rem;
}

footer .small {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.visible {
    opacity: 1;
    transform: translate(0);
}

/* Responsive */
@media (max-width: 900px) {
    .grid-2 {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
}