:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --background: #f8fafc;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
    margin: 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    background: rgba(255, 255, 255, 0.95);
    padding: 2.5rem;
    border-radius: 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    width: 90%;
    max-width: 500px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

h1 {
    color: #1e293b;
    margin: 0 0 2rem 0;
    font-size: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

.input-group {
    position: relative;
    margin: 1.5rem 0;
    overflow: hidden;
}

input[type="url"] {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid #e2e8f0;
    border-radius: 0.75rem;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: #f8fafc;
    box-sizing: border-box;
    margin: 0;
}

input[type="url"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.link-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #64748b;
}

input[type="submit"] {
    width: 100%;
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 0.75rem;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.2s ease;
    margin-top: 1rem;
}

input[type="submit"]:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

#message {
    margin: 1.5rem 0 0 0;
    padding: 1rem;
    background: #f1f5f9;
    border-radius: 0.5rem;
    color: #1e293b;
    font-size: 0.9rem;
    line-height: 1.5;
}

.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.feature-item {
    text-align: center;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 0.5rem;
}

.feature-item svg {
    width: 24px;
    height: 24px;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

@media (max-width: 480px) {
    .container {
        padding: 1.5rem;
        border-radius: 1rem;
    }
    
    h1 {
        font-size: 1.5rem;
    }
}