:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --bg-light: #f8fafc;
    --border-color: #e2e8f0;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
}

/* Header */
.navbar {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.8rem;
    color: var(--primary-color) !important;
}

.navbar-nav .nav-link {
    font-weight: 500;
    color: var(--text-dark) !important;
    margin: 0 0.5rem;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: var(--primary-color) !important;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 6rem 0;
    margin-bottom: 4rem;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.hero .btn {
    padding: 12px 30px;
    font-weight: 600;
    border-radius: 50px;
}

/* Tool Cards */
.tool-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    height: 100%;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    text-decoration: none;
    color: inherit;
}

.tool-card .icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: white;
}

.tool-card h4 {
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.tool-card p {
    color: var(--text-light);
    margin: 0;
}

/* Advertisement Spaces */
.ad-banner {
    background: var(--bg-light);
    border: 2px dashed var(--border-color);
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    margin: 3rem 0;
    color: var(--text-light);
}

.ad-sidebar {
    background: var(--bg-light);
    border: 2px dashed var(--border-color);
    border-radius: 10px;
    padding: 1.5rem;
    text-align: center;
    color: var(--text-light);
    margin-bottom: 2rem;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Features Section */
.features {
    background: var(--bg-light);
    padding: 5rem 0;
    margin: 4rem 0;
}

.feature-item {
    text-align: center;
    padding: 2rem;
}

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

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 3rem 0 1rem;
}

.footer h5 {
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: white;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero {
        padding: 4rem 0;
    }
    
    .tool-card {
        margin-bottom: 2rem;
    }
}