/* Common Styles for Test Blog Website */
:root {
    --primary-color: #2dd4bf; /* Teal */
    --secondary-color: #14b8a6; /* Darker teal */
    --accent-color: #fbbf24; /* Warm yellow */
    --warm-green: #10b981; /* Emerald */
    --light-teal: #a7f3d0; /* Light teal */
    --dark-bg: #0f172a; /* Dark slate */
    --light-bg: #f8fafc; /* Light gray */
    --text-dark: #1e293b; /* Dark slate */
    --text-light: #64748b; /* Slate */
    --white: #ffffff;
    --gradient-primary: linear-gradient(135deg, #2dd4bf 0%, #14b8a6 100%);
    --gradient-warm: linear-gradient(135deg, #10b981 0%, #fbbf24 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-large: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--light-bg);
}

/* Header Styles */
.header {
    background: var(--gradient-primary);
    box-shadow: var(--shadow-medium);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--white);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 700;
    transition: all 0.3s ease;
}

.logo:hover {
    transform: translateY(-1px);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: 0 4px 12px rgba(45, 212, 191, 0.3);
    transition: all 0.3s ease;
}

.logo:hover .logo-icon {
    transform: rotate(5deg) scale(1.05);
    box-shadow: 0 6px 20px rgba(45, 212, 191, 0.4);
}

.logo-icon::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.logo-icon::after {
    content: '✓';
    position: absolute;
    color: var(--primary-color);
    font-size: 14px;
    font-weight: bold;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
}

.nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.nav-icon {
    font-size: 1.1rem;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.nav-link:hover .nav-icon {
    opacity: 1;
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.2);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1001;
}

.mobile-menu-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.mobile-menu-btn.active {
    background: rgba(255, 255, 255, 0.2);
}

/* Footer Styles */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

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

.footer-section h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-section p,
.footer-section a {
    color: #94a3b8;
    text-decoration: none;
    line-height: 1.8;
}

.footer-section a:hover {
    color: var(--primary-color);
}

/* Social Media Icons */
.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    justify-content: center;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(45, 212, 191, 0.1);
    border: 1px solid rgba(45, 212, 191, 0.3);
    border-radius: 50%;
    color: var(--primary-color);
    font-size: 1.2rem;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(45, 212, 191, 0.3);
}

.footer-links {
    list-style: none;
}

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

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 1rem;
    text-align: center;
    color: #64748b;
}

/* Utility Classes */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.section {
    padding: 4rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.card {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.grid {
    display: grid;
    gap: 2rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-container {
        padding: 0 1rem;
    }
    
    .nav {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(20, 184, 166, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        padding: 2rem;
        z-index: 1000;
        animation: slideInMobile 0.3s ease-out;
    }

    @keyframes slideInMobile {
        from {
            opacity: 0;
            transform: translateY(-100%);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .nav .nav-link {
        font-size: 1.5rem;
        padding: 1rem 2rem;
        margin: 0.5rem 0;
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.1);
        backdrop-filter: blur(5px);
        border: 1px solid rgba(255, 255, 255, 0.2);
        min-width: 200px;
        text-align: center;
        transform: translateY(20px);
        opacity: 0;
        animation: slideInItem 0.3s ease-out forwards;
    }

    .nav .nav-link:nth-child(1) { animation-delay: 0.1s; }
    .nav .nav-link:nth-child(2) { animation-delay: 0.2s; }
    .nav .nav-link:nth-child(3) { animation-delay: 0.3s; }
    .nav .nav-link:nth-child(4) { animation-delay: 0.4s; }
    .nav .nav-link:nth-child(5) { animation-delay: 0.5s; }

    @keyframes slideInItem {
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .nav .nav-link:hover {
        background: rgba(255, 255, 255, 0.2);
        transform: translateY(-2px);
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    }
    
    .nav.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 2rem 0;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .card {
        padding: 1.5rem;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.6s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.6s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}