/* Global Styles */
:root {
    --primary: #4361ee;
    --secondary: #3f37c9;
    --accent: #4895ef;
    --dark: #1b263b;
    --light: #f8f9fa;
    --success: #4cc9f0;
    --warning: #f72585;
    --binary: #f72585;
    --decimal: #4895ef;
    --octal: #7209b7;
    --hex: #4cc9f0;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: var(--light);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    
}

header {
    background-image: linear-gradient(90deg, rgb(255, 150, 112), coral, rgb(255, 107, 54), rgb(255, 68, 0));
    color: white;
    padding: 2rem 0;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

nav {
    background-color: var(--dark);
    color: white;
    padding: 1rem 0;
    background-image: linear-gradient(90deg, rgb(255, 150, 112), coral, rgb(255, 107, 54), rgb(255, 68, 0));
}

nav ul {
    display: flex;
    list-style: none;
    justify-content: center;
}

nav ul li {
    margin: 0 1rem;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}

nav ul li a:hover, nav ul li a.active {
    background-color: var(--accent);
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    padding: 3rem 0;
    gap: 2rem;
}

.hero-content {
    flex: 1;
}

.hero-image {
    flex: 1;
}

.hero-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.hero h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--dark);
}

.hero p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: #555;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
}

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

.btn-secondary {
    background-color: var(--light);
    color: var(--dark);
    border: 1px solid var(--dark);
}

.btn-secondary:hover {
    background-color: var(--dark);
    color: white;
    transform: translateY(-2px);
}

/* Number Systems Grid */
.number-systems {
    padding: 3rem 0;
}

.number-systems h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--dark);
}

.systems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.system-card {
    background-color: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
    text-align: center;
}

.system-card:hover {
    transform: translateY(-5px);
}

.system-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.5rem;
    color: white;
}

.binary {
    background-color: var(--binary);
}

.decimal {
    background-color: var(--decimal);
}

.octal {
    background-color: var(--octal);
}

.hex {
    background-color: var(--hex);
}

.system-card h3 {
    margin-bottom: 1rem;
    color: var(--dark);
}

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

.example {
    font-family: monospace;
    background-color: #f0f0f0;
    padding: 0.5rem;
    border-radius: 4px;
    font-size: 0.9rem;
}

/* Conversion Methods */
.conversion-methods {
    padding: 3rem 0;
}

.conversion-methods h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--dark);
}

.method-tabs {
    display: flex;
    border-bottom: 1px solid #ddd;
    margin-bottom: 1.5rem;
}

.tab {
    padding: 0.8rem 1.5rem;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
}

.tab:hover {
    color: var(--primary);
}

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 500;
}

.tab-content {
    display: none;
    padding: 1rem;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

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

.tab-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.tab-content pre {
    background-color: #f0f0f0;
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    margin: 1rem 0;
}

/* Footer */
footer {
       background-image: linear-gradient(90deg, rgb(255, 150, 112), coral, rgb(255, 107, 54), rgb(255, 68, 0));
    color: white;
    text-align: center;
    padding: 1.5rem 0;
    margin-top: 2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero {
        flex-direction: column;
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    nav ul li {
        margin: 0.5rem 0;
    }
}