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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ec 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 24px;
    padding: 40px;
    max-width: 500px;
    width: 100%;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    text-align: center;
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.icon {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 20px;
    border: 4px solid rgba(255, 255, 255, 0.9);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

h1 {
    color: #333;
    font-size: 28px;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    color: #666;
    font-size: 16px;
    margin-bottom: 30px;
}

.button {
    background: #2c3e50;
    color: white;
    border: none;
    padding: 16px 40px;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(44, 62, 80, 0.25);
    margin: 20px 0;
    display: none;
    text-decoration: none;
}

.button:hover {
    background: #34495e;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(44, 62, 80, 0.35);
}

.button:active {
    transform: translateY(0);
}

.footer {
    margin-top: 30px;
    color: #666;
    font-size: 14px;
    padding: 12px;
    background: #f8f9fa;
    border-radius: 8px;
}

.instagram-notice {
    margin-top: 32px;
    padding: 32px;
    background: #ffffff;
    border: 2px solid #e8eaed;
    border-radius: 16px;
    display: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.instagram-notice .title {
    font-size: 18px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 24px;
    letter-spacing: -0.3px;
}

.instagram-notice .steps {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.instagram-notice .step {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 0;
}

.instagram-notice .step-number {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    background: #2c3e50;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
}

.instagram-notice .step-text {
    flex: 1;
    font-size: 15px;
    line-height: 24px;
    color: #4a4a4a;
}

.instagram-notice .step-text strong {
    font-weight: 600;
    color: #1a1a1a;
}

.instagram-notice .final-note {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #e8eaed;
    font-size: 14px;
    color: #6b6b6b;
    text-align: center;
}

@media (max-width: 480px) {
    .container {
        padding: 30px 20px;
    }

    h1 {
        font-size: 24px;
    }

    .button {
        padding: 14px 30px;
        font-size: 16px;
    }
}