* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #1a2a6c, #b21f1f, #fdbb2d);
    color: #333;
    min-height: 100vh;
    padding: 20px;
}

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

header {
    text-align: center;
    padding: 30px 0;
    margin-bottom: 40px;
}

h1 {
    font-size: 3rem;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    margin-bottom: 10px;
}

.subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 50px;
}

.tool-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.tool-icon {
    background: #2c3e50;
    color: white;
    font-size: 2.5rem;
    padding: 30px 0;
    text-align: center;
}

.tool-content {
    padding: 20px;
}

.tool-content h3 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 1.5rem;
}

.tool-content p {
    color: #666;
    line-height: 1.5;
    margin-bottom: 20px;
}

.tool-link {
    display: inline-block;
    padding: 10px 20px;
    background: #2c3e50;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.3s;
}

.tool-link:hover {
    background: #3498db;
}

footer {
    text-align: center;
    margin-top: 50px;
    color: white;
    padding: 20px;
}

/* Auth Modal */
.auth-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.auth-content {
    background: white;
    border-radius: 15px;
    width: 90%;
    max-width: 450px;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
    animation: modalFade 0.3s;
}

@keyframes modalFade {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.auth-header {
    background: #2c3e50;
    color: white;
    padding: 20px;
    text-align: center;
}

.auth-header h2 {
    font-size: 1.8rem;
    margin-bottom: 5px;
}

.auth-body {
    padding: 25px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2c3e50;
}

.input-group input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border 0.3s;
}

.input-group input:focus {
    border-color: #3498db;
    outline: none;
}

.auth-btn {
    width: 100%;
    padding: 12px;
    background: #2c3e50;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}

.auth-btn:hover {
    background: #3498db;
}

.auth-message {
    padding: 10px;
    margin-top: 15px;
    border-radius: 5px;
    text-align: center;
    display: none;
}

.auth-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 15px;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    h1 {
        font-size: 2.2rem;
    }
}