/* Global Styles */
:root {
    --primary-color: #007bff; /* Ocean Blue */
    --secondary-color: #ff6b6b; /* Accent Orange */
    --bg-color: #f8f9fa;
    --text-color: #333;
    --card-bg: #ffffff;
    --border-color: #e9ecef;
    --footer-bg: #343a40;
    --footer-text: #adb5bd;
    --font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --spacing-unit: 1rem;
    --container-width: 1100px;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

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

a:hover {
    color: #0056b3;
}

ul {
    list-style: none;
}

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

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
}

/* Header & Navigation */
header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #333;
}

.logo span {
    color: var(--secondary-color);
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    color: #555;
    font-weight: 500;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary-color);
}

/* Hamburger Menu (Mobile) */
.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 123, 255, 0.8), rgba(0, 86, 179, 0.9)), url('https://placehold.co/1200x400/007bff/fff?text=Hungry+Shark+Evolution');
    background-size: cover;
    background-position: center;
    color: #fff;
    padding: 4rem 1rem;
    text-align: center;
    border-radius: 0 0 10px 10px;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--secondary-color);
    color: #fff;
    border-radius: 5px;
    font-weight: bold;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #ff5252;
    color: #fff;
}

/* Layout: Sidebar + Main Content */
.main-wrapper {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

/* Blog Cards */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background-color: #eee;
}

.card-content {
    padding: 1.5rem;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.card-meta {
    font-size: 0.85rem;
    color: #777;
    margin-bottom: 1rem;
}

.card-text {
    color: #555;
    margin-bottom: 1rem;
}

.read-more {
    font-weight: 600;
    font-size: 0.9rem;
}

/* Sidebar */
.sidebar {
    position: sticky;
    top: 90px;
    height: fit-content;
}

.widget {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.widget-title {
    font-size: 1.1rem;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

.widget-links li {
    margin-bottom: 0.5rem;
}

.widget-links a {
    color: #555;
    display: block;
    padding: 5px 0;
    border-bottom: 1px solid #eee;
}

.widget-links a:hover {
    padding-left: 5px;
}

/* Content Page Styling */
.post-content h2 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: #222;
}

.post-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: #444;
}

.post-content p {
    margin-bottom: 1rem;
}

.post-content ul, .post-content ol {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.post-content li {
    margin-bottom: 0.5rem;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    background: #fff;
}

table th, table td {
    padding: 12px;
    border: 1px solid var(--border-color);
    text-align: left;
}

table th {
    background-color: #f1f3f5;
    font-weight: 600;
}

/* Download Box */
.download-box {
    background: #fff;
    border: 1px solid #ddd;
    border-left: 5px solid var(--secondary-color);
    padding: 2rem;
    margin: 2rem 0;
    text-align: center;
    border-radius: 5px;
}

.file-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 10px;
    margin-bottom: 1.5rem;
    background: #f9f9f9;
    padding: 1rem;
    border-radius: 5px;
}

.info-item span {
    display: block;
    font-weight: bold;
    color: #555;
}

/* Footer */
footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
    padding: 3rem 0;
    margin-top: 3rem;
    font-size: 0.9rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-col h4 {
    color: #fff;
    margin-bottom: 1rem;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--footer-text);
}

.footer-links a:hover {
    color: #fff;
}

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #495057;
}

/* Responsive */
@media (max-width: 900px) {
    .main-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none; /* Add JS toggle later if needed or CSS hover */
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #fff;
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 4px 4px rgba(0,0,0,0.1);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
}